CN103813579A - Light emitting diode driving circuit and driving system of light emitting diode - Google Patents
Light emitting diode driving circuit and driving system of light emitting diode Download PDFInfo
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Abstract
A light emitting diode driving circuit and a driving system of a light emitting diode are suitable for driving at least one light emitting diode, and the light emitting diode driving circuit comprises two shift temporary storage units and a data storage unit. The two shift register units can respectively store the values of different bits in the plurality of brightness setting data, and the data storage unit can be used for temporarily storing the value stored by one of the shift register units. Through the circuit architecture, the light emitting diode driving circuit can drive the light emitting diode by using the values of a plurality of bits in the same driving period, so that the driving efficiency of the light emitting diode driving circuit is improved.
Description
Technical field
The present invention relates to a kind of LED driving circuit, and particularly relate to a kind of single drive output and can drive according to the value of two bits LED driving circuit and the drive system of light-emitting diode.
Background technology
Light-emitting diode (Light Emitting Diode is called for short LED) is a kind of solid-state light emitting element, is made up of the semi-conducting material of P type and N-type, and it can be created in the autoradiolysis light in ultraviolet ray, visible ray and infrared spectral range.Because LED has the plurality of advantages such as power saving, the life-span is long, brightness is high, recently under the trend of environmental protection and energy-saving and carbon-saving, the application of LED is more and more extensive, the various lighting device of the such as backlight module of traffic signals, street lamp, flashlight, liquid crystal display or for example LED bulb etc.
LED display industry at present all take high color range resolution, high picture refreshing rate, high LED utilance, high number of scans, drive a chip serial connection number more and reduce costs as developing goal.Adopt basic money to drive chip price comparatively cheap, but under the application of scan screen, will reach high color range resolution, high picture refreshing rate, high number of scans can cause LED utilance to reduce and a chip serial connection number tails off defect.Adopt more expensive built-in pulse width modulation (plus width modulation, PWM), although the driving chip of function can more easily reach the target of high color range resolution and high LED utilance under the application of scan screen, must reduce a chip serial connection number and number of scans if will pursue high picture refreshing rate.And adopt the driving chip cost of built-in pulse width modulation (plus width modulation, PWM) function can increase many.
Parts of traditional technology propose LED driving method for improve light-emitting diode utilance (effective rate) with picture update rate (refresh rate), can in same drive cycle, the data with multiple bits drive, but general circuit framework also cannot provide multiple bits of multiple brightness settings simultaneously.
Summary of the invention
The invention provides a kind of LED driving circuit and its drive system, two displacement temporary storage unit of its LED driving circuit tool and a data storage element, can store the data of two bits simultaneously and carry out Data Update an output, making it be applicable to the LED driving method that needs multiple bits to drive.
The embodiment of the present invention proposes a kind of LED driving circuit, be applicable to drive at least one light-emitting diode, comprise one first displacement temporary storage unit, one second displacement temporary storage unit, a path selection unit, a data storage element, an output select unit and a driver element.The first displacement temporary storage unit is in order to receive one first data in brightness settings data; The second displacement temporary storage unit is in order to receive one second data in brightness settings data; Path selection unit is coupled to this first displacement temporary storage unit and this second displacement temporary storage unit, switches to the output of this first displacement temporary storage unit or the output of this second displacement temporary storage unit according to a path select signal; Data storage element is coupled to this first displacement temporary storage unit, stores these first data in this first shift registor according to a latch-up signal.
Output select unit is coupled to this data storage element and this second displacement temporary storage unit, selects signal to select stored value or the stored value of this second displacement temporary storage unit of this data storage element of output according to an output.Driver element is coupled to this output select unit, determines a fluorescent lifetime of these light-emitting diodes according to the stored value of the stored value of this data storage element, this second displacement temporary storage unit and an enable signal.
In an embodiment of the present invention, above-mentioned the first displacement temporary storage unit and this second displacement temporary storage unit are obtained respectively these first data and this second data in this brightness settings according to this path select signal.
In an embodiment of the present invention, above-mentioned driver element comprises at least one gate and a driver output circuit, two inputs of this gate are respectively coupled to the output of this enable signal and this output select unit, and the output of this gate couples this driver output circuit.
In an embodiment of the present invention, above-mentioned LED driving circuit also comprises a signal generation unit, be coupled to this output select unit, this path selection unit and this data storage element, this signal generation unit is selected signal, this path select signal and this latch-up signal according to this output of the array output of a switching signal and this enable signal.
In another embodiment of the present invention, above-mentioned LED driving circuit also comprises a signal generation unit, be coupled to this output select unit, this path selection unit and this data storage element, this signal generation unit is selected signal, this path select signal and this latch-up signal according to this output of the array output of a switching signal and a data clock signal.
The another drive system that proposes a kind of light-emitting diode of the present invention, comprises a control unit and above-mentioned LED driving circuit.Control unit is in order to export an enable signal and brightness settings data to above-mentioned LED driving circuit.
In sum, LED driving circuit of the present invention and its drive system have two displacement temporary storage unit and a data storage element, can store the data of two bits to provide driver element to drive light-emitting diode in single drive cycle to a drive output simultaneously.Circuit framework of the present invention goes for using the driving method of multidigit unit, and its circuit framework is simple and easy, and cost is low and must not improve transfer of data frequency range and can reach and obtain multiple bits simultaneously and drive technology effect of usefulness to improve.
For above-mentioned feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and coordinate appended graphicly, be described in detail below.
Accompanying drawing explanation
Fig. 1 illustrates the drive system schematic diagram of the light-emitting diode of the embodiment of the present invention.
Fig. 2 illustrates the LED driving circuit schematic diagram of the embodiment of the present invention.
Fig. 3 A illustrates the circuit diagram of the LED driving circuit 120 of the embodiment of the present invention.
Fig. 3 B is the schematic diagram of signal generation unit according to another embodiment of the present invention.
Fig. 4 is the signal waveform schematic diagram of the embodiment of the present invention.
[main element symbol description]
Drive system: 100
Light-emitting diode: 101
Control unit: 110
LED driving circuit: 120
The first displacement temporary storage unit: 210
The second displacement temporary storage unit: 220
Path selection unit: 230
Data storage element: 240
Output select unit: 250
Driver element: 260
Signal generation unit: 310
With door: 311,321
Shift registor: 312,322
Inverse gate: 323
With door: 351 ~ 35P
Driver output circuit: 361 ~ 36P
Waveform: 411 ~ 418
Output: OUT1 ~ OUTP
Signal: SOUT is selected in output
The first clock signal: CLK1
Second clock signal: CLK2
Data input signal: DIN
Data output signal: DO
Data clock signal: DCK
Latch-up signal: LAT
Enable signal: EN
Anti-phase enable signal: ENB
Path select signal: SEL
Switching signal: SW
Embodiment
Hereinafter, will describe the present invention in detail by graphic explanation embodiments of the invention, and same reference numbers in graphic can be in order to element like representation class.
Please refer to Fig. 1, Fig. 1 illustrates the drive system schematic diagram of the light-emitting diode of the embodiment of the present invention.Drive system 100 comprises control unit 110 and LED driving circuit 120, and control unit 110 is coupled to LED driving circuit 120, and output enable signal EN and data input signal DIN are to LED driving circuit 120.LED driving circuit 120 drives light-emitting diode 101 according to enable signal EN and data input signal DIN, in order to produce gray scale variation.Control unit 110 is for example the controller of light emitting diode (LED) display screen, can be used to process and output display data, also can provide switching signal, latched data signal or data clock signal to LED driving circuit 120.
According to different chip specification and design requirement, control unit 110 can have different functions, and this enforcement is not limited.LED driving circuit 120 is for example the driving chip of light-emitting diode, is mainly used to provide drive current to drive light-emitting diode 101.LED driving circuit 120 can utilize size of current or electric current output timing to adjust the GTG (brightness) that light-emitting diode 101 produces.Control unit 110 can be connected via printed circuit board (PCB) or holding wire with LED driving circuit 120, and the present embodiment does not limit the annexation between control unit 110 and LED driving circuit 120.
Please refer to Fig. 2, Fig. 2 illustrates the LED driving circuit schematic diagram of the embodiment of the present invention.LED driving circuit 120 comprises the first displacement temporary storage unit 210, the second displacement temporary storage unit 220, path selection unit 230, data storage element 240, output select unit 250 and driver element 260.The input of the first displacement temporary storage unit 210 and the second displacement temporary storage unit 220 is coupled to the data input pin of LED driving circuit 120, in order to receive data input signal DIN.Data input signal DIN comprises brightness settings data, in order to represent the driving brightness of indivedual light-emitting diodes 101, the coded system of its data input signal DIN is for example general string order sequenced data, DMX512 agreement, Manchester's code (MANCHESTER Encoding), but the coded system of the present embodiment is not restricted to this.
The output of the first displacement temporary storage unit 210 and the second displacement temporary storage unit 220 is coupled to path selection unit 230, in order to transmit data.The output of path selection unit 230 is in order to export data output signal DO.Data storage element 240 is coupled to the first displacement temporary storage unit 210, in order to store the data in the first displacement temporary storage unit 210.Output select unit 250 is coupled to data storage element 240 and the second displacement temporary storage unit 220, in order to select the data in output data storage element 240 or the second displacement temporary storage unit 220.
The first displacement temporary storage unit 210 and the second displacement temporary storage unit 220 are mainly used to temporary from the brightness settings data in the data input signal DIN of control unit 110, and it can be stored in respectively two working areas by two relevant data of brightness settings according to the bit order of data input signal DIN.Brightness settings data in data input signal DIN are for example the luma data (n is positive integer) of n bit.Luma data is corresponding to the brightness settings of the light-emitting diode of indivedual outputs, and different outputs can have different brightness settings.LED driving circuit 120 can determine the light-emitting diode luminance driving according to brightness settings data.
The first displacement temporary storage unit 210 and the second displacement temporary storage unit 220 can receive respectively the first data and the second data in brightness settings data according to path select signal SEL, for example the value of the different bits of luma data.With the brightness settings data instance explanation of 8 bits, the first displacement temporary storage unit 210 can be carried out data shift register to obtain the value of the 2nd position in many brightness settings data of corresponding different outputs in the time that path select signal SEL is high level, and the second displacement temporary storage unit 220 can be carried out data shift register to obtain the value of the 3rd bit in many brightness settings data of corresponding different outputs in the time that path select signal SEL is low level.Data to the first displacement temporary storage unit 210 and the second displacement temporary storage unit 220 that under different time, transmit data input signal DIN, the first displacement temporary storage unit 210 can get different bit values or data from the second displacement temporary storage unit 220 by this.The first displacement temporary storage unit 210 and the second displacement temporary storage unit 220 can be by: the flip-flops such as R-S flip-flop (flip-flop), D type flip-flop, T-shaped flip-flop, JK flip-flop, D type latch unit or latch unit form, but the present embodiment is not limited.
The first displacement temporary storage unit 210 and the second displacement temporary storage unit 220 can have multiple data storage elements, can store the bit value of many brightness settings data with the multiple drive output of correspondence simultaneously.For instance, 220 bit numbers that can store of the first displacement temporary storage unit 210 and the second displacement temporary storage unit can be identical with the number of the output OUT1 ~ OUTP of driver element 260, but the present embodiment does not limit.
It is to come from the first displacement temporary storage unit 210 or the second displacement temporary storage unit 220 that path selection unit 230 can switch the data of transmitting according to path select signal SEL.For instance, in the time that the first displacement temporary storage unit 210 is carried out data acquisition, path selection unit 230 can switch to the first displacement temporary storage unit 210, makes the data in the first displacement temporary storage unit 210 can be passed to the first displacement temporary storage unit in next LED driving circuit (driving chip).In the time that the second displacement temporary storage unit 220 is carried out data acquisition, path selection unit 230 can switch to the second displacement temporary storage unit 220, makes the data in the first displacement temporary storage unit 220 can be passed to the second displacement temporary storage unit in next LED driving circuit (driving chip).Path selection unit 230 is for example multiplexer, but the present embodiment is not limited.
Output select unit 250 can select signal SOUT to select value stored in the stored value of output data storage element 240 or the second displacement temporary storage unit 220 to driver element 260 according to output.For instance, output select unit 250 can be exported the value of the 3rd stored in the value of the 2nd bit in data storage element 240 and the second displacement temporary storage unit 220 to driver element 260 in the drive cycle of a light-emitting diode.
It is positive integer that driver element 260 has multiple output OUT1 ~ OUTP(P), in order to couple light-emitting diode 101.Driver element 250 can be adjusted the electric current of output OUT1 ~ OUTP to drive multiple light-emitting diodes 101.Generally speaking, driver element 250 has multiple constant-current circuits, can control respectively the electric current that flows into output OUT1 ~ OUTP to determine fluorescent lifetime and the brightness of light-emitting diode 101.Sense of current can be determined according to the driving direction of design requirement and light-emitting diode 101, and the present embodiment does not limit the electric current outbound course of driver element 250 and the circuit design framework of its constant-current circuit.
Because LED driving circuit 120 has two displacement temporary storage unit 210,220 and data storage element 240, therefore LED driving circuit 120 can be carried out Data Update and driving simultaneously.For instance, the first displacement temporary storage unit 210 and the second displacement temporary storage unit 220 can store respectively the 1st bit (the first data) and the 2nd bit (the second data) in multiple brightness settings according to path select signal SEL.Then, data storage element 240 can be obtained from the first displacement temporary storage unit 210 value of the 1st bit, completes after the storage of the 1st bit at data storage element 240, and the first displacement temporary storage unit 210 just can be carried out Data Update.Now, output select unit 250 can export value in value or the data storage element 240 in the second displacement temporary storage unit 220 to driver element 260 to drive light-emitting diode.
Complete after data updating in the first displacement temporary storage unit 210, the second displacement temporary storage unit 220 can then be carried out data updating, and now, the data that output select unit 250 can be exported in data storage element 240 drive light-emitting diode.In other words, the second displacement temporary storage unit 220 can be carried out Data Update in the time that output select unit 250 switches to data storage element 240, and the first displacement temporary storage unit 210 can be carried out Data Update after data storage element 240 obtains the data in the first displacement temporary storage unit 210.That is to say, in the time that output select unit 250 switches to the second displacement temporary storage unit 220 once again, the second displacement temporary storage unit 220 has completed the action of Data Update, driver element 260 does not need to wait update time of pending data, can obtain next record brightness settings data or next required bit value drives light-emitting diode.
It should be noted that, above-mentioned path select signal SEL, latch-up signal LAT, enable signal EN select signal SOUT to be provided or to be provided by the internal circuit of LED driving circuit 120 by external circuit (as control unit 110) with output, and the present embodiment is unrestricted.
Please refer to Fig. 3 A, Fig. 3 A illustrates the circuit diagram of the LED driving circuit 120 of the embodiment of the present invention.Driver element 260 can be by multiple gates and driver output the electric circuit constitute, for example multiple and door (AND gate) 351 ~ 35P and driver output circuit 361 ~ 36P.Receive respectively the output of enable signal EN and output select unit 250 with the input of door 351 ~ 35P, be coupled to driver output circuit 361 ~ 36P with the output of door 351 ~ 35P, determine according to the output of enable signal EN and output select unit 250 whether driver output circuit 361 ~ 36P drives light-emitting diode 101.From Fig. 3 A, when enable signal EN is logic high potential and output select unit 250 while being output as logic high potential (logical one), just can enable with the output of door 351 ~ 35P, make driver output circuit 361 ~ 36P output current.Driver output circuit 361 ~ 36P, for example for to determine current output circuit, can export and determine electric current to drive light-emitting diode 101.
Please refer to Fig. 3 B, Fig. 3 B is the schematic diagram of signal generation unit according to another embodiment of the present invention.In another embodiment of the present invention, signal generation unit 310 is coupled to output select unit 250, path selection unit 230 and data storage element 240, can select signal SOUT, path select signal SEL and latch-up signal LAT according to the above-mentioned output of the array output of switching signal SW and data clock signal DCK.
Output selects signal SOUT, path select signal SEL all relevant with the sequential that data are transmitted to latch-up signal LAT, as long as the coherent signal of sequential that therefore can response data input signal DIN all can be used to produce output and selects signal SOUT, path select signal SEL and latch-up signal LAT, the present embodiment does not limit producing method.It should be noted that, the signals such as switching signal SW, enable signal EN, data input signal DIN and data clock signal DCK in Fig. 3 A can all or part ofly export LED driving circuit 120 to by control unit 110, but the not producing method of restricting signal of the present embodiment.
The first displacement temporary storage unit 210 comprises gate (with door 311) and shift registor 312, receive respectively with two inputs of door 311 the data clock signal DCK and the path select signal SEL that come from control unit 110, its output is exported the first clock signal clk 1 to shift registor 312.The input of shift registor 312 is coupled to data input signal DIN, and its input end of clock is coupled to the output with door 311.
The second displacement temporary storage unit 220 comprises gate (with door 321 and inverse gate 323) and shift registor 322, receive respectively the output of the data clock signal DCK and the inverse gate 323 that come from control unit 110 with two inputs of door 321, the input of inverse gate 323 is coupled to path select signal SEL.Export second clock signal CLK2 to shift registor 322 with the output of door 321.The input of shift registor 322 is coupled to data input signal DIN, and its input end of clock is coupled to the output with door 321.
From foregoing circuit framework, in the time that path select signal SEL is logic high potential, the first displacement temporary storage unit 210 can be carried out Data Update, and the second displacement temporary storage unit 220 can not carried out Data Update; In the time that path select signal SEL is logic low potential, the second displacement temporary storage unit 220 can be carried out Data Update, and the first displacement temporary storage unit 210 can not carried out Data Update.
Utilize path select signal SEL, the first displacement temporary storage unit 210 can be obtained the brightness settings data in data input signal DIN from the second displacement temporary storage unit 220 in different sequential.And the first displacement temporary storage unit 210 and the second displacement temporary storage unit 220 can be according to the brightness settings data in data clock signal DCK temporal data input signal DIN.
Next, please also refer to Fig. 4, the signal waveform schematic diagram that Fig. 4 is the embodiment of the present invention.Fig. 4 illustrates that above-mentioned data input signal DIN, data clock signal DCK, switching signal SW, enable signal EN, anti-phase enable signal ENB, path select signal SEL, second clock signal CLK2, the first clock signal clk 1, latch-up signal LAT and output selects the sequential relationship of signal SOUT.
When the waveform 411 of path select signal SEL is high level, the first displacement temporary storage unit 210 is obtained for example the 5th bit of multiple high bit MSB(in many brightness settings data by data input signal DIN) value, then, when the waveform 411 of path select signal SEL switches to low level waveform 412, the second displacement temporary storage unit 220 is obtained for example the 1st bit of multiple low bit LSB(in many brightness settings data by data input signal DIN) value.Then, latch-up signal LAT produces enabling pulse 413, makes data storage element 240 obtain the value of the multiple high bit MSB in the first displacement temporary storage unit 210.Then,, when output selects the waveform 414 of signal SOUT to be low level, output select unit 250 can be exported the value of multiple low bit LSB stored in the second displacement temporary storage unit 220.
Enable signal EN enables waveform 415(high level) make driver element 260 drive light-emitting diode 101 according to the value of multiple low bit LSB stored in the second displacement temporary storage unit 220.Now, path select signal SEL switches to the waveform 416 of high level, makes the first displacement temporary storage unit 210 carry out Data Update.Then, output selects the waveform 418 of signal SOUT correspondence to switch to high level, make output select unit 240 export value stored in data storage element 240 to driver element 260, what enable signal EN switched to high level afterwards enables waveform 417, makes driver element 260 drive light-emitting diode 101 according to the value of multiple high bit MSB stored in data storage element 240.The rest may be inferred, and LED driving circuit 120 can be constantly updated data and drive light-emitting diode according to new data.
It should be noted that, above-mentioned waveform is only for illustrating one of execution mode of the present embodiment circuit, the enabling level and can determine according to design requirement of its each signal, via the explanation of above-described embodiment, those skilled in the art should know all the other execution modes easily by inference, do not add and repeat at this.
In addition, it should be noted that the relation that couples between said elements comprises direct or indirect electric connection, as long as can reach required electrical signal transfer function, the present invention is not limited.Technological means in above-described embodiment can merge or use separately, and its element can increase, remove, adjust or replace according to its function and design requirement, and the present invention is not limited.After the explanation via above-described embodiment, those skilled in the art should know its execution mode by inference, do not add and repeat at this.
In sum, the framework of the LED driving circuit that the embodiment of the present invention proposes can store different bit value in many brightness settings data simultaneously, make the drive circuit can be in same drive cycle, utilize multiple bit values to drive, can improve by this light-emitting diode utilance and picture update rate.
Although embodiments of the invention have disclosed as above; but the present invention is not limited to above-described embodiment; any person of an ordinary skill in the technical field; not departing from the disclosed scope of the present invention; when doing a little change and adjustment, therefore protection scope of the present invention should with accompanying claim the person of being defined be as the criterion.
Claims (12)
1. a LED driving circuit, is applicable to drive at least one light-emitting diode, it is characterized in that, described LED driving circuit comprises:
The first displacement temporary storage unit, in order to receive one first data in brightness settings data;
The second displacement temporary storage unit, in order to receive one second data in brightness settings data;
Path selection unit, is coupled to described the first displacement temporary storage unit and described the second displacement temporary storage unit, switches to the output of described the first displacement temporary storage unit or the output of described the second displacement temporary storage unit according to a path select signal;
Data storage element, is coupled to described the first displacement temporary storage unit, stores described the first data in described the first shift registor according to a latch-up signal;
Output select unit, is coupled to described data storage element and described the second displacement temporary storage unit, selects signal to select to export the stored value of described data storage element or the stored value of described the second displacement temporary storage unit according to an output; And
Driver element, is coupled to described output select unit, decides the fluorescent lifetime of described light-emitting diode according to the stored value of the stored value of described data storage element, described the second displacement temporary storage unit and an enable signal.
2. LED driving circuit according to claim 1, it is characterized in that, described the first displacement temporary storage unit and described the second displacement temporary storage unit are obtained respectively described the first data and described the second data in described brightness settings data according to described path select signal.
3. LED driving circuit according to claim 1, is characterized in that, described path select signal, described output select signal and described latch-up signal to be produced by an internal circuit.
4. LED driving circuit according to claim 1, it is characterized in that, described driver element comprises at least one gate and a driver output circuit, two inputs of described gate are respectively coupled to the output of described enable signal and described output select unit, and the output of described gate is coupled to described driver output circuit.
5. LED driving circuit according to claim 1, is characterized in that, described LED driving circuit also comprises:
Signal generation unit, be coupled to described output select unit, described path selection unit and described data storage element, described signal generation unit is exported described path select signal, described output selection signal and described latch-up signal according to the combination of a switching signal and described enable signal.
6. LED driving circuit according to claim 1, is characterized in that, described LED driving circuit also comprises:
Signal generation unit, be coupled to described output select unit, described path selection unit and described data storage element, described signal generation unit is exported described path select signal, described output selection signal and described latch-up signal according to the combination of a switching signal and a data clock signal.
7. LED driving circuit according to claim 1, it is characterized in that, described the second displacement temporary storage unit can be carried out Data Update in the time that described output select unit is selected the described data storage element of output, and described the first displacement temporary storage unit can be obtained at described data storage element the laggard row Data Update of data of described the first displacement temporary storage unit.
8. a drive system for light-emitting diode, is characterized in that, described drive system comprises:
Control unit, in order to export an enable signal and brightness settings data; And
LED driving circuit, is coupled to described control unit, and described LED driving circuit comprises:
The first displacement temporary storage unit, in order to receive one first data in described brightness settings data;
The second displacement temporary storage unit, in order to receive one second data in described brightness settings data;
Path selection unit, is coupled to described the first displacement temporary storage unit and described the second displacement temporary storage unit, switches to the output of described the first displacement temporary storage unit or the output of described the second displacement temporary storage unit according to a path select signal;
Data storage element, is coupled to described the first displacement temporary storage unit, stores described the first data in described the first shift registor according to a latch-up signal;
Output select unit, is coupled to described data storage element and described the second displacement temporary storage unit, selects signal to select to export the stored value of described data storage element or the stored value of described the second displacement temporary storage unit according to an output; And
Driver element, is coupled to described output select unit, and the value that the value, described the second displacement temporary storage unit that store according to described data storage element are stored and an enable signal decide the fluorescent lifetime of described light-emitting diode.
9. the drive system of light-emitting diode according to claim 8, it is characterized in that, described the first displacement temporary storage unit and described the second displacement temporary storage unit are obtained respectively described the first data and described the second data in described brightness settings data according to described path select signal.
10. the drive system of light-emitting diode according to claim 8, it is characterized in that, described control unit can be exported a switching signal, and described LED driving circuit is exported described path select signal, described output selection signal and described latch-up signal according to the combination of described switching signal and described enable signal.
The drive system of 11. light-emitting diodes according to claim 8, it is characterized in that, described control unit can be exported a switching signal and a data clock signal, and described LED driving circuit is exported described path select signal, described output selection signal and described latch-up signal according to the combination of described switching signal and described clock signal.
The drive system of 12. light-emitting diodes according to claim 8, it is characterized in that, described the second displacement temporary storage unit can be carried out Data Update in the time that described output select unit is selected the described data storage element of output, and described the first displacement temporary storage unit can be obtained at described data storage element the laggard row Data Update of data of described the first displacement temporary storage unit.
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| TW101141796A TWI491304B (en) | 2012-11-09 | 2012-11-09 | Led driver circuit and driver system |
| TW101141796 | 2012-11-09 |
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| WO2020019872A1 (en) * | 2018-07-26 | 2020-01-30 | 深圳市爱协生科技有限公司 | Display device |
| CN110768879A (en) * | 2018-07-26 | 2020-02-07 | 深圳市爱协生科技有限公司 | Communication control link |
| CN114582271A (en) * | 2020-11-16 | 2022-06-03 | 明阳半导体股份有限公司 | Gray scale generating circuit and method |
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| TWI489909B (en) | 2013-09-18 | 2015-06-21 | Macroblock Inc | Light emitting diode drive system and control method |
| TWI609602B (en) * | 2014-12-16 | 2017-12-21 | Macroblock Inc | Multi-channel light emitting diode drive control device and system |
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| CN110768879A (en) * | 2018-07-26 | 2020-02-07 | 深圳市爱协生科技有限公司 | Communication control link |
| CN110768879B (en) * | 2018-07-26 | 2021-11-19 | 深圳市爱协生科技有限公司 | Communication control link |
| CN114582271A (en) * | 2020-11-16 | 2022-06-03 | 明阳半导体股份有限公司 | Gray scale generating circuit and method |
| CN114582271B (en) * | 2020-11-16 | 2023-10-10 | 明阳半导体股份有限公司 | Gray scale generation circuit and method |
Also Published As
| Publication number | Publication date |
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| TW201419937A (en) | 2014-05-16 |
| CN103813579B (en) | 2016-04-06 |
| TWI491304B (en) | 2015-07-01 |
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