CN1141613C - Four-color and color-mixing LCD screen - Google Patents
Four-color and color-mixing LCD screen Download PDFInfo
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- CN1141613C CN1141613C CNB021149925A CN02114992A CN1141613C CN 1141613 C CN1141613 C CN 1141613C CN B021149925 A CNB021149925 A CN B021149925A CN 02114992 A CN02114992 A CN 02114992A CN 1141613 C CN1141613 C CN 1141613C
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- 239000011521 glass Substances 0.000 claims description 8
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- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The present invention relates to a liquid crystal display screen, particularly to a four-color and adjustable multicolor liquid crystal display screen. The liquid crystal display screen is composed of many pixels, wherein each pixel is composed of an upper and a lower full color polarizing films, and two liquid crystal boxes placed in the middle of the two full color polarizing films. Compared with the electric control birefringence color liquid crystal display screen in the past, the display screen has the advantages of wide visual angles, omnidirection at an angle of 360 DEG during observation, achievement of 80 DEG of a visual line incident angle, insensitive dependence of displayed colors on temperature, showy displayed colors and simple drive circuits. Compared with the luminous tube display screen, the display screen has the advantages of low power consumption, long service life, low cost, etc., wherein the display screen with a plurality of square meters is driven only by ten watts of power; the display screen is not maintained in general when the display screen is used for more than ten years. The pixel of the display screen is large. The display screen is particularly suitable for being used as a large color display screen for large words or graphics, and the display area of the display screen can reach tens of square meters or hundreds of square meters.
Description
Technical field
The present invention relates to a kind of LCDs, the LCDs of particularly a kind of four looks and adjustable polychrome.
Background technology
The present chromatic liquid crystal screen of supplying on the market, have with the colour filter film, have with the color polaroid.The color of its colour filter or selection has only three kinds of red, green, blues; The variable color of its pixel has only two kinds.Adopt this display packing,, can obtain the picture of different colours by colour mixture for the smaller display screen of pixel.But for the bigger display screen of pixel, its effect is just poor, needs the color liquid crystal display arrangement of the variable multiple color of each pixel of development.There is the method for human electrically conerolled birefringence to obtain the LCD of the variable multiple color of each pixel in the past, but its view effect is very poor, color is bright-coloured inadequately, its colour will change when environment temperature has small change with the voltage that is added in liquid crystal cell, colored stability and the poor reliability that shows, add that its driving circuit is very complicated, therefore can't reach realistic scale.
Summary of the invention
The purpose of this invention is to provide four bigger looks of a kind of pixel and adjustable multi-color LCD display screen, its pixel can be carried out multiple color change, and driving circuit is fairly simple, bright-colored, picture and text clear display.
The present invention's four looks and adjustable multi-color LCD display screen are made up of many pixels, each pixel is by two panchromatic polaroids, two liquid crystal cells of middle placement are constituted (as Fig. 1) up and down, two liquid crystal cells can adopt the different thickness and the STN of different twist angles, its thickness is got 4-8 μ m respectively, twist angle is got the 180-270 degree, irritate the liquid crystal that Δ n=0.1-0.23 is arranged in the liquid crystal cell, the relative orientation of liquid crystal cell A and liquid crystal cell B polishing direction is the 0-90 degree, and polaroid A and polaroid B select folk prescription to being the 0-180 degree.As add completely reflecting mirror below polaroid B, this display is reflective; As add the incident light source below polaroid B, this display is a transmission-type.The circuit that LCDs adopts connects and drives liquid crystal cell A and liquid crystal cell B respectively, when the voltage V1 (or V2) that is added in liquid crystal cell A (or liquid crystal cell B) is the off attitude during less than threshold voltage, is expressed as V1off (or V2off); When voltage surpasses threshold voltage is the on attitude, is expressed as V1on (or V2on).Therefore, the voltage that is added on the liquid crystal cell can have four kinds of assembled state (V1onV2on; V1off V2off; V1on V2off; V1off V2on), each state people can be visual to different colors on polaroid A, shows so be called four dichroic liquid crystals.These four kinds of colors depend on the selection of the polarization direction of the relative orientation of PI film polishing direction of form (being the polishing direction of PI film in the liquid crystal cell), liquid crystal cell A and liquid crystal cell B of molecular orientation of the thickness of liquid crystal cell and the liquid crystal that poured into, liquid crystal cell and polaroid A, polaroid B.To this four-color liquid crystal display as long as the rotation that the orientation of polaroid A is made different angles can obtain four kinds of different colors (every kind of color adds different voltage statuss corresponding to liquid crystal cell), can change multiple color thereby obtain each pixel very easily, this claims adjustable polychrome device of liquid crystals.Its driving circuit of multi-color LCD display screen of being made up of many pixels can be with static drive or two kinds of methods of multiplex addressing (so-called dynamic driving), the very precipitous stn liquid crystal display of response curve need be adopted for dynamic drive method, bigger electric current should be able to be provided to the bigger display drive circuit of pixel in addition.After the thickness of two liquid crystal cells and twist angle are determined, need to select to have suitable optically anisotropic liquid crystal respectively and pour into liquid crystal cell, and the polarization direction of liquid crystal cell A, the liquid crystal cell B polishing relative orientation of direction and polaroid A, polaroid B done suitable adjustment, could obtain multiple chromatic colour.This multi-color LCD display screen change color way the most easily is to change the two added voltage of LCD panel (V1on V2on; V1offV2off; V1on V2off; Four kinds of states of V1off V2on) and change polaroid A select folk prescription to, it has the Presentation Function of four looks or adjustable polychrome.
This LCDs is compared the advantage with wide viewing angle with the electrically conerolled birefringence chromatic liquid crystal screen in past, can be comprehensive during observation 360 degree, the sight line incident angle reaches 80 degree; The color that shows depends on temperature insensitively, can be applicable to wide temperature range; The color that shows is very bright-coloured; It adopts the driving method of multiplex addressing, and driving circuit is very simple.This display screen has been compared following advantage with the luminotron display screen: low-power consumption only needs ten watts power can drive several square metres display screen; Long-life, use the more than ten years generally need not keep in repair; Cheap etc.; When the colour of strong more its demonstration of extraneous light bright-coloured more.The pixel of this display screen bigger (being generally several square centimeters), therefore be especially suitable for use as under the outdoor high light, large colour display screen as very big literal or figure, its display area can reach tens of square metres or hundreds of square metres, the characteristic that can give full play to us like this is that each pixel can change multiple color, can certainly be used for making the display screen of small pixel (less than one square centimeter).
Fig. 1 is the dot structure synoptic diagram of four looks and adjustable multi-color LCD display screen.
Among Fig. 1, each pixel by two panchromatic polaroids up and down, middlely place two liquid crystal cells and constituted, wherein 1 is polaroid A, 2 is polaroid B, 3 is liquid crystal cell A, 4 is liquid crystal cell B.Liquid crystal cell A, liquid crystal cell B can select the stn liquid crystal box of two 240 degree distortions, and the thickness of two liquid crystal cells is 6.3 μ m; Liquid crystal cell pours into the liquid crystal of SLC5411-035 model; The polishing direction of liquid crystal cell A: lower-glass is along 75 degree angles, and upper glass is along 15 degree angles; The polishing direction of liquid crystal cell B: lower-glass is along 30 degree angles, and upper glass is along-30 degree angles.Liquid crystal cell A connects voltage V1, and liquid crystal cell B connects voltage V2.When the polarization direction of polaroid B during along zero angle, making alive is four kinds of different states, if the polarization direction of polaroid A can demonstrate red, green, blue, Bai Sise during along 75 degree angles; If the polarization direction of polaroid A presents pink, blue, coffee, pure white when 35 spend angles; If the polarization direction of polaroid A presents purplish red, cadmium yellow, sky blue, silver grey when-10 spend angles; If it is blackish green, light blue, yellow, pitch black that the polarization direction of polaroid A presents when-50 spend; If it is green, golden yellow, light blue, black that the polarization direction of polaroid A presents when-75 spend.Above given stationary digital allow bigger variation range and still can obtain similar display effect, what this LCD can change liquid crystal cell A, the added voltage of liquid crystal cell B or change polaroid A selects folk prescription to obtaining different Show Colors, has the Presentation Function of four looks or adjustable polychrome.
Above-mentioned display screen adopts the driving method of multiplex addressing, we adopt the chip for driving (Samsung KS0066) of LCD directly to drive by the 1/8duty mode during less than 0.1 square centimeter when the area of pixel, during the area as pixel bigger (above 0.1 square centimeter), the add one operation amplifier provides sufficient drive current before the row and column input of LCD panel, this display screen is the chromatic liquid crystal screen that the unit constitutes different display areas with 16 * 16 lattice modules, installs very convenient.
Claims (2)
1, a kind of four looks and adjustable multi-color LCD display screen, form by many pixels, each pixel that it is characterized in that this LCDs is by two panchromatic polaroids, two liquid crystal cells of middle placement are constituted up and down, two liquid crystal cells can adopt the different thickness and the STN of different twist angles, its thickness is got 4-8 μ m respectively, twist angle is got the 180-270 degree, irritate the liquid crystal that Δ n=0.1-0.23 is arranged in the liquid crystal cell, the relative orientation of liquid crystal cell A and liquid crystal cell B polishing direction is the 0-90 degree, and polaroid A and polaroid B select folk prescription to being the 0-180 degree; The circuit that LCDs adopts connects and drives liquid crystal cell A and liquid crystal cell B respectively, when the voltage V1 that is added in liquid crystal cell A or liquid crystal cell B or V2 are the off attitude during less than threshold voltage, is expressed as V1off or V2off; When voltage surpasses threshold voltage is the on attitude, is expressed as V1on or V2on; Therefore, the voltage that is added on the liquid crystal cell can have four kinds of assembled state V1on V2on; V1off V2off; V1onV2off; V1off V2on goes out four kinds of different colors according to four kinds of status adjustment.
2, a kind of four looks as claimed in claim 1 and adjustable multi-color LCD display screen, the twist angle that it is characterized in that two liquid crystal cells are 240 degree, and thickness is 6.3 μ m, and liquid crystal cell pours into the liquid crystal of SLC 5411-035 model; The polishing direction of liquid crystal cell A: lower-glass is along 75 degree angles, and upper glass is along 15 degree angles; The polishing direction of liquid crystal cell B: lower-glass is along 30 degree angles, and upper glass is along-30 degree angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021149925A CN1141613C (en) | 2002-03-22 | 2002-03-22 | Four-color and color-mixing LCD screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021149925A CN1141613C (en) | 2002-03-22 | 2002-03-22 | Four-color and color-mixing LCD screen |
Publications (2)
| Publication Number | Publication Date |
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| CN1371020A CN1371020A (en) | 2002-09-25 |
| CN1141613C true CN1141613C (en) | 2004-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021149925A Expired - Fee Related CN1141613C (en) | 2002-03-22 | 2002-03-22 | Four-color and color-mixing LCD screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100383607C (en) * | 2006-01-23 | 2008-04-23 | 厦门亚东眼镜企业有限公司 | Improved structure of polarizing optical lens and making method thereof |
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- 2002-03-22 CN CNB021149925A patent/CN1141613C/en not_active Expired - Fee Related
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