WO2004066136A2 - Touch sensitive display device - Google Patents
Touch sensitive display device Download PDFInfo
- Publication number
- WO2004066136A2 WO2004066136A2 PCT/IB2003/006339 IB0306339W WO2004066136A2 WO 2004066136 A2 WO2004066136 A2 WO 2004066136A2 IB 0306339 W IB0306339 W IB 0306339W WO 2004066136 A2 WO2004066136 A2 WO 2004066136A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- touch sensitive
- display device
- layer
- sensitive display
- layers
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
Definitions
- the invention relates to a touch sensitive display device with a multiple of picture elements and having means for applying driving voltages to said picture elements the display device.
- the display device is for instance a liquid crystal display device.
- Liquid crystal display devices have found widespread use in the computer industry and in handheld devices ranging from mobile telephones and price tags to palm top computers and organizers. Also the combination with a touching device such as a stylus has found widespread applications, while also a need for ways of providing input via the display screen is felt.
- USP 5,777,596 describes a touch sensitive liquid crystal display device that allows putting input into the associated device (e.g. a computer) by simply touching the display screen with a finger, a stylus or a pen.
- the device continuously compares the charge time of the liquid crystal display elements (picture elements) to a reference value and uses the result of the comparison to determine which elements are being touched.
- One of the problems in said touch sensitive liquid crystal display device resides in restoring the right image after sensing. This is due to the fact that a blinking line is used which represents the switching of all picture elements in a row between two extreme states. When the blinking line reaches a certain row touching is detected by measuring the charging time of the picture elements. After measuring the picture elements are provided with adequate voltages to display the right image. In a similar way sensing by means of a blinking spot is disclosed in USP 5,777,596.
- DC bias voltages may be present whereby charging differs for writing odd or even frames.
- DC -driving methods low power liquid crystal displays, electrophoretic displays
- no inversion occurs so the method cannot be used at all there.
- a touch sensitive display device comprises a layer of touch sensitive material, the touch sensitive display device having means for monitoring the electrical characteristics of said layer of touch sensitive material and sensing a change in said electrical characteristics.
- the display structure By incorporating a layer with pressure sensitive characteristics (e.g. non-linear resistivity such as may be realized by means of quantum tunneling composites or a piezoresistive layer) into the display structure, the display structure itself becomes intrinsically touch sensitive.
- a layer with pressure sensitive characteristics e.g. non-linear resistivity such as may be realized by means of quantum tunneling composites or a piezoresistive layer
- the pressure sensitive layer is sandwiched in between two optical films (retardation film, polarizer film, etc.) which are in front of the display cell or in between the display cell and one of these optical layers, deteriorating of the front of screen performance due to air-substrate interfaces in front of the device, which refract and reflect light is prevented.
- two optical films retardation film, polarizer film, etc.
- Figure 1 schematically shows a touch sensitive (liquid crystal) display device
- Figures 2 shows a cross-sections of a part of a touch sensitive (liquid crystal) display device according to the invention
- Figures 3 and 4 show the principle of determining the coordinates of touching a touch sensitive (liquid crystal) display device according to the invention.
- Figure 5 shows a further embodiment of a touch sensitive (liquid crystal) display device according to the invention.
- Figure 1 is an electric equivalent circuit diagram of a part of a touch sensitive display device 1 to which the invention is applicable. It comprises in one possible embodiment (one mode of driving, called the "passive mode") a matrix of picture elements 8 defined by the areas of crossings of row or selection electrodes 7 and column or data electrodes 6.
- the row electrodes are consecutively selected by means of a row driver 4, while the column electrodes are provided with data via a data register 5.
- incoming data 2 are first processed, if necessary, in a processor 3.
- Mutual synchronization between the row driver 4 and the data register 5 takes place via drive lines 9.
- signals from the row driver 4 select the picture electrodes via thin- film transistors (TFTs) 10 whose gate electrodes are electrically connected to the row electrodes 7 and the source electrodes are electrically connected to the column electrodes.
- TFTs thin-film transistors
- the signal which is present at the column electrode 6 is transferred via the TFT to a picture electrode of a picture element 8 coupled to the drain electrode.
- the other picture electrodes are connected to, for example, one (or more) common counter electrode(s).
- TFTs thin-film transistor
- Figure 2 shows a cross-section of apart of a touch sensitive liquid crystal device having a bottom substrate 11 and an upper substrate 12 with a liquid crystal layer 13 between said substrates.
- the touch sensitive liquid crystal device has (not shown) picture electrodes on the bottom substrate 11 and on the other substrate 12.
- the display device in this example further comprises a polarizer 14, an analyzer 15, a backlight structure 18 and in this particular example a further optical layer 16 such as for instance a quarter lambda plate and a protective layer 17.
- a structure or layer 19 with pressure sensitive characteristics is provided, in this particular example between the bottom substrate 11 and the polarizer 14.
- the pressure sensitive structure or layer 19 in this example has pressure sensitive particles 22 together with spacer particles 21 between two transparent conducting layers 20 (e.g. indium tin oxide).
- QTC Quantum Tunneling Composites
- the space separation of the particles is reduced by the presence of the dendrites. At a certain loading point, the space separation of the particles becomes close enough to enable the electrons from one particle to jump to the other particle through the dendrites. However, the dendrites from two different particles are still not in contact with each other. The quantum tunneling act of the electrons leads to rapid resistivity decrease of the material as a whole.
- QTC is a pressure/force sensitive switching material whose switching properties are comparable to these of a mechanical switch. Moreover it can be moulded into different shapes and can be mixed with other polymers.
- normal polymer non-conducting spherical spacers 21 prevent the QTC spacers 22 from being overloaded and going to plasticity.
- Another function of the normal polymer spacer is to ensure that there is no shorting between the upper and lower layers 20.
- the diameter of the QTC spacer 22 preferably is less than or equal to the size of the normal polymer spacer 21.
- the sensitive layer can be a mixture of compressible bonding material, such as a silicone rubber mixed with conducting spherical spacers, having a diameter smaller than the thickness of the layer of compressible silicone rubber.
- FIG. 3 a is an electrical equivalent of the pressure sensitive structure or layer 19, by means of the variable resistor 23.
- Figures 3 and 4 show how the impedance between the upper and lower electrode is monitored.
- a rapid drop in resistance indicates a touch action.
- the amount of pressure is determined by measuring the impedance of the pressure sensitive structure or layer 19. Said resistance is
- V - V ⁇ R QTC ⁇ r R- read m which R rea d is a readout resistor, indicated in Figure 3 by the
- the sensing system then may proceed to detect the x y co-ordinates by means of using one of the electrodes 20 as a probe. As shown in Figures 3b and 3 c the voltage N s is applied to the edges of an electrode 20, either directly or via mutually insulated low - impedance strips 24, such as metal strips. In one direction (y), if the picture element has a
- V T R r spacer layer upon touching.
- V read ead —
- the sensing system starts with a calibration step 31 ( Figure 4) in which the values of N s are calibrated (e.g. V s (0, H) and N s (W,0) together with N s (0,0), the latter generally being ground. Then the sensing system, if necessary after being switched on (step 32) goes to the touch detect mode (step 33) The sensing system then may proceed to detect the x - y co-ordinates by means of using one of the electrodes 20 as a probe. Indication of a touch action is determined by measuring the amount of pressure (e.g. by measuring the impedance of the pressure sensitive structure or layer 19, Figure 3a).
- the sensing system then may proceed to detect the x y co-ordinates by means of using the method Figures 3b and 3 c (step 36) and then return to the touch detect mode (arrow 37). If a too small amount of pressure is present the sensing system immediately returns to the touch detect mode (arrow 35).
- the pressure sensitive layer may also be present between two optical films (in this case a retardation film 16 and a polarizer 15, but other kinds of optical films, like mirror layers, reflective and transflective layers are possible too) in front of the display device.
- the pressure sensitive layer may also be present in between the substrate 13 of the display device and one of these optical layers. In this case no extra films are used in front of the display cell and the number of air-substrate interfaces, which refract and reflect light, in front of the screen is reduced.
- the protective scope of the invention is not limited to the embodiments described, while the invention is also applicable to other display devices, for example, emissive, electrochromic and elecfrowetting displays.
- the normal polymer spacers 21 as shown in Figure 2 need not always be present.
- flexible substrates may be used (wearable displays, wearable electronics).
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003292482A AU2003292482A1 (en) | 2003-01-20 | 2003-12-24 | Touch sensitive display device |
JP2004567071A JP2006513501A (en) | 2003-01-20 | 2003-12-24 | Touch sensitive display |
EP03768063A EP1588247A2 (en) | 2003-01-20 | 2003-12-24 | Touch sensitive display device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03100097 | 2003-01-20 | ||
EP03100097.9 | 2003-01-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004066136A2 true WO2004066136A2 (en) | 2004-08-05 |
WO2004066136A3 WO2004066136A3 (en) | 2004-12-16 |
Family
ID=32748918
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2003/006339 WO2004066136A2 (en) | 2003-01-20 | 2003-12-24 | Touch sensitive display device |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1588247A2 (en) |
JP (1) | JP2006513501A (en) |
KR (1) | KR20050100625A (en) |
CN (1) | CN1739087A (en) |
AU (1) | AU2003292482A1 (en) |
TW (1) | TWM256560U (en) |
WO (1) | WO2004066136A2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007012899A1 (en) | 2005-07-25 | 2007-02-01 | Plastic Logic Limited | Flexible touch screen display |
WO2009064601A1 (en) * | 2007-11-09 | 2009-05-22 | Motorola, Inc. | Mobile electronic device having capacitive sensor with reduced visibility isolation areas and corresponding method |
WO2012010739A1 (en) * | 2010-07-22 | 2012-01-26 | Nokia Corporation | User interface with touch pressure level sensing |
WO2011115650A3 (en) * | 2010-03-17 | 2012-08-09 | Motorola Solutions, Inc. | Transparent force sensor and method of fabrication |
US8451249B2 (en) | 2005-07-25 | 2013-05-28 | Plastic Logic Limited | Flexible touch screen display |
US8963874B2 (en) | 2010-07-31 | 2015-02-24 | Symbol Technologies, Inc. | Touch screen rendering system and method of operation thereof |
US8988191B2 (en) | 2009-08-27 | 2015-03-24 | Symbol Technologies, Inc. | Systems and methods for pressure-based authentication of an input on a touch screen |
US9229600B2 (en) | 2006-06-05 | 2016-01-05 | Flexenable Limited | Multi-touch active display keyboard |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101432569B1 (en) * | 2007-11-20 | 2014-08-21 | 엘지디스플레이 주식회사 | Liquid crystal display device having touch screen and method for fabricating the same |
KR101703780B1 (en) * | 2008-12-15 | 2017-02-07 | 코닌클리케 필립스 엔.브이. | User interface device and method |
GB2468870B (en) * | 2009-03-25 | 2016-08-03 | Peratech Holdco Ltd | Sensor |
CN106019676B (en) * | 2016-07-29 | 2020-11-06 | 京东方科技集团股份有限公司 | Display substrate and display panel |
CN109782956B (en) * | 2019-01-22 | 2020-06-02 | 上海大学 | Display panel manufacturing method |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4814760A (en) * | 1984-12-28 | 1989-03-21 | Wang Laboratories, Inc. | Information display and entry device |
EP0773497A1 (en) * | 1995-11-13 | 1997-05-14 | Symbios Logic Inc. | Electrically driven display and method |
EP0817110A2 (en) * | 1996-06-28 | 1998-01-07 | Nokia Mobile Phones Ltd. | Terminal device with touch screen |
GB2321707A (en) * | 1997-01-31 | 1998-08-05 | John Karl Atkinson | A means for determining the x, y and z co-ordinates of a touched surface |
US5949501A (en) * | 1996-02-13 | 1999-09-07 | Kabushiki Kaisha Pilot | Coordinates input device using liquid crystal sheet |
WO2001002899A2 (en) * | 1999-07-01 | 2001-01-11 | E Ink Corporation | Electrophoretic medium provided with spacers |
US20020025837A1 (en) * | 2000-05-22 | 2002-02-28 | Levy David H. | Input devices and their use |
US6501529B1 (en) * | 1999-08-18 | 2002-12-31 | International Business Machines Corporation | Liquid crystal display element integrated with a touch sensor |
WO2004013746A2 (en) * | 2002-08-01 | 2004-02-12 | Koninklijke Philips Electronics N.V. | Touch sensitive display device |
-
2003
- 2003-12-24 EP EP03768063A patent/EP1588247A2/en not_active Withdrawn
- 2003-12-24 KR KR1020057013302A patent/KR20050100625A/en not_active Application Discontinuation
- 2003-12-24 JP JP2004567071A patent/JP2006513501A/en active Pending
- 2003-12-24 WO PCT/IB2003/006339 patent/WO2004066136A2/en not_active Application Discontinuation
- 2003-12-24 CN CNA2003801089084A patent/CN1739087A/en active Pending
- 2003-12-24 AU AU2003292482A patent/AU2003292482A1/en not_active Abandoned
-
2004
- 2004-01-16 TW TW093200870U patent/TWM256560U/en not_active IP Right Cessation
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4814760A (en) * | 1984-12-28 | 1989-03-21 | Wang Laboratories, Inc. | Information display and entry device |
EP0773497A1 (en) * | 1995-11-13 | 1997-05-14 | Symbios Logic Inc. | Electrically driven display and method |
US5949501A (en) * | 1996-02-13 | 1999-09-07 | Kabushiki Kaisha Pilot | Coordinates input device using liquid crystal sheet |
EP0817110A2 (en) * | 1996-06-28 | 1998-01-07 | Nokia Mobile Phones Ltd. | Terminal device with touch screen |
GB2321707A (en) * | 1997-01-31 | 1998-08-05 | John Karl Atkinson | A means for determining the x, y and z co-ordinates of a touched surface |
WO2001002899A2 (en) * | 1999-07-01 | 2001-01-11 | E Ink Corporation | Electrophoretic medium provided with spacers |
US6501529B1 (en) * | 1999-08-18 | 2002-12-31 | International Business Machines Corporation | Liquid crystal display element integrated with a touch sensor |
US20020025837A1 (en) * | 2000-05-22 | 2002-02-28 | Levy David H. | Input devices and their use |
WO2004013746A2 (en) * | 2002-08-01 | 2004-02-12 | Koninklijke Philips Electronics N.V. | Touch sensitive display device |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007012899A1 (en) | 2005-07-25 | 2007-02-01 | Plastic Logic Limited | Flexible touch screen display |
US8451249B2 (en) | 2005-07-25 | 2013-05-28 | Plastic Logic Limited | Flexible touch screen display |
US8890831B2 (en) | 2005-07-25 | 2014-11-18 | Plastic Logic Limited | Flexible touch screen display |
US9229600B2 (en) | 2006-06-05 | 2016-01-05 | Flexenable Limited | Multi-touch active display keyboard |
WO2009064601A1 (en) * | 2007-11-09 | 2009-05-22 | Motorola, Inc. | Mobile electronic device having capacitive sensor with reduced visibility isolation areas and corresponding method |
US9018030B2 (en) | 2008-03-20 | 2015-04-28 | Symbol Technologies, Inc. | Transparent force sensor and method of fabrication |
US8988191B2 (en) | 2009-08-27 | 2015-03-24 | Symbol Technologies, Inc. | Systems and methods for pressure-based authentication of an input on a touch screen |
WO2011115650A3 (en) * | 2010-03-17 | 2012-08-09 | Motorola Solutions, Inc. | Transparent force sensor and method of fabrication |
WO2012010739A1 (en) * | 2010-07-22 | 2012-01-26 | Nokia Corporation | User interface with touch pressure level sensing |
US8963874B2 (en) | 2010-07-31 | 2015-02-24 | Symbol Technologies, Inc. | Touch screen rendering system and method of operation thereof |
US9310920B2 (en) | 2010-07-31 | 2016-04-12 | Symbol Technologies, Llc | Touch screen rendering system and method of operation thereof |
Also Published As
Publication number | Publication date |
---|---|
AU2003292482A1 (en) | 2004-08-13 |
AU2003292482A8 (en) | 2004-08-13 |
KR20050100625A (en) | 2005-10-19 |
EP1588247A2 (en) | 2005-10-26 |
WO2004066136A3 (en) | 2004-12-16 |
TWM256560U (en) | 2005-02-01 |
CN1739087A (en) | 2006-02-22 |
JP2006513501A (en) | 2006-04-20 |
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