CN1104340A - Liquid crystal-disply device and its making technology - Google Patents
Liquid crystal-disply device and its making technology Download PDFInfo
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- CN1104340A CN1104340A CN 93120973 CN93120973A CN1104340A CN 1104340 A CN1104340 A CN 1104340A CN 93120973 CN93120973 CN 93120973 CN 93120973 A CN93120973 A CN 93120973A CN 1104340 A CN1104340 A CN 1104340A
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- liquid crystal
- crystal display
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Abstract
The present invention provides a feasible method for realizing confounded arrangement display mode of liquid crystal molecules by using flash cooling method to make liquid crystal molecules implement macroscopic unordered arrangement and microscopic ordered arrangement on the surface which is not passed through the process of orientation treatment. The confounded arrangement hypertorsional nematic phase liquid crystal display mode is a liquid crystal display mode without surface orientation treatment, so that it has an important significance for raising the production rate of finished products of liquid crystal display device, in particular active matrix liquid crystal display device. This displaymode has a good visual angle property, and overcomes the disadvantage of narrow visual range of existent liquid crystal display device.
Description
The invention belongs to liquid crystal display device.
For a long time, people are seeking a kind of display mode that does not rub always, because friction process can reduce the yield rate that liquid crystal device is produced greatly, especially for the liquid crystal display of active driving addressing.Simultaneously, because the optical anisotropy of liquid crystal, there is the narrow problem of visible angle in liquid crystal display device, influences it and uses widely.People generally improve its viewing angle characteristic with the way of compensate film or compensation liquid crystal layer now, but the complex process of this method, the cost height, viewing angle characteristic is also improved completely.
The objective of the invention is to disclose a kind of friction free technology display mode, can improve the yield rate of liquid crystal device production and reach the incomparable viewing angle characteristic of general display mode.
The present invention realizes above-mentioned purpose like this:
Liquid crystal is that microcosmic is unordered at its isotropy warm area, i.e. the orientation of each molecule all is arbitrarily, and this moment, its optical characteristics was isotropic.After the isotropy warm area of liquid crystal molecule directly reduced to the liquid crystal phase warm area, liquid crystal molecule can form many small local farmlands on the surface that not oriented is handled, and the orientation of liquid crystal molecule is consistent in the farmland; But the orientation difference on each farmland, its direction is arbitrarily, thereby from macroscopic view, the arrangement of liquid crystal molecule is unordered, uniform.But because Liquid Crystal Molecules Alignment still has specific direction on the microcosmic, thereby the propagation of energy polarisation-affecting light, have optical anisotropy, thereby can realize the chaotic display mode of arranging of liquid crystal.
The speed of cooling is big or small influential to the local farmland, and the speed of cooling is fast more, and the local farmland of formation is just more little.For the display mode that confusion is arranged, the local farmland should be less than the resolution (about 0.1 millimeter) of human eye, and the local farmland is more little, and its macroscopical randomness is strong more, and display performance is good more.
Because liquid crystal is to arrange arbitrarily on the surface of no orientation process, thereby the twist angle of liquid crystal molecule between liquid crystal cell two inside surfaces is only thick by box and the pitch decision of liquid crystal, specifically is expressed as: φ
Tmiet2 π d/P
Work as φ
TmietBe that the chaotic twisted nematic liquid crystal of arranging shows (TNLCD) pattern in the time of 90 °, the angle of front and back two polaroid optical axises also is 90 ° usually, when institute's making alive during greater than threshold voltage liquid crystal molecule can tend to the parallel electric field direction and arrange, this moment is for being parallel to the polarized light that the direction of an electric field people penetrates, liquid crystal is optically isotropic, therefore liquid crystal layer does not change the polarization polarized state of light, thereby the two vertical polaroids of placing are light tight, and device shows dark attitude.The dark attitude of this display mode is bigger to the dependence that the light people penetrates the inclination angle, and the steepness of electro-optical characteristic is more slow, and displaying principle is main according to the variation that sees through light intensity.Work as φ
TmietBe that the chaotic supertwist nematic liquid crystal of arranging shows (STNLCD) pattern in the time of＞90 °, not only seeing through light intensity with the voltage increase can change, and main is that color also changes.
Arrange nematic two kinds of display modes as confusion, the chaotic TNLCD that arranges is mainly used in active matrix, because slow electro-optical characteristic can provide good gray shade scale; The chaotic STNLCD that arranges then is applied to passive matrix, because steeper electro-optical characteristic can provide bigger multichannel driving force.
Fig. 1 is the picture that obtains under polarizing microscope with the present invention.
The present invention is described in further detail below in conjunction with accompanying drawing and embodiment.
On transparent conducting glass (ito glass), apply insulation course Substance P I(polyimide equably), thermal treatment then, when being 280 ℃, temperature on two substrate surfaces, forms solid PI, after envelope box glue (epoxy resin) envelope box solidifies, to contain chiral material nematic liquid crystal (90 ℃) under isotropic temperature injects in the box, rapidly liquid crystal cell is put into refrigerator then, make it sharply be cooled to liquid crystal phase warm area (0 ℃), obtain that liquid crystal molecule realizes on the surface that not oriented is handled that macroscopic view is unordered but arrangement that microcosmic is orderly, can under polarizing microscope, observe.Stick polaroid in the liquid crystal cell both sides and can obtain the chaotic nematic liquid crystal display box of arranging.
Claims (2)
1, a kind of liquid crystal display device, it is characterized in that liquid crystal molecule the surface to be arranged as macroscopic view unordered and microcosmic is orderly.
2, a kind of technology of making the described liquid crystal display device of claim 1 is characterized in that the cooling scope is directly reduced to the liquid crystal phase warm area from the isotropy warm area of liquid crystal molecule to the liquid crystal molecule arrangement of lowering the temperature on the surface that not oriented is handled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93120973 CN1104340A (en) | 1993-12-21 | 1993-12-21 | Liquid crystal-disply device and its making technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93120973 CN1104340A (en) | 1993-12-21 | 1993-12-21 | Liquid crystal-disply device and its making technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1104340A true CN1104340A (en) | 1995-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93120973 Pending CN1104340A (en) | 1993-12-21 | 1993-12-21 | Liquid crystal-disply device and its making technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1104340A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100426079C (en) * | 1997-12-26 | 2008-10-15 | 日石三菱株式会社 | Liquid crystal displays |
-
1993
- 1993-12-21 CN CN 93120973 patent/CN1104340A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100426079C (en) * | 1997-12-26 | 2008-10-15 | 日石三菱株式会社 | Liquid crystal displays |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |