CN107942575A - The display system of multilayer TN LCD - Google Patents
The display system of multilayer TN LCD Download PDFInfo
- Publication number
- CN107942575A CN107942575A CN201711174028.7A CN201711174028A CN107942575A CN 107942575 A CN107942575 A CN 107942575A CN 201711174028 A CN201711174028 A CN 201711174028A CN 107942575 A CN107942575 A CN 107942575A
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- China
- Prior art keywords
- lcd
- display system
- multilayer
- backlight
- liquid crystal
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
- G02F1/133565—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements inside the LC elements, i.e. between the cell substrates
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The present invention relates to a kind of display system of multilayer TN LCD, including：Backlight, multilayer TN LCD, light polarizing film and 1/2 wavelength plate, backlight is located at the inner side of display system, multilayer TN LCD are stacked gradually from the inner side of display system toward outside, light polarizing film is provided with the surface of the close backlight of innermost one layer of TN LCD, light polarizing film is also equipped with the surface of the remote backlight of one layer of TN LCD on the outermost side, 1/2 wavelength plate is between innermost TN LCD and outermost TN LCD.During tonal gradation is lifted, briliancy first reduces the display system with the lifting of tonal gradation, then increases with the lifting of tonal gradation, so that colourity changes in particular range, ensures display quality.
Description
Technical field
The present invention relates to field of liquid crystal display, more particularly, to a kind of display system of multilayer TN-LCD.
Background technology
Liquid crystal display (Liquid Crystal Displays, LCD) has become essential in people's daily life
One of equipment.At present, multilayer LCD is applied to secure display system, and secure display system is generally adopted by multilayer distortion
Nematic liquid crystal displays (Twisted Nematic-LCD, TN-LCD).
Shown in please referring to Fig.1, in the prior art, secure display system includes：Backlight BL (Back Light), multilayer
Twisted nematic liquid crystal display TN-LCD and light polarizing film PF (Polarization Film), multilayer twisted nematic liquid crystal display
TN-LCD is stacked, and backlight BL is located at the side of multilayer twisted nematic liquid crystal display TN-LCD, every layer of twisted-nematic liquid
Two surfaces of crystal display TN-LCD are respectively equipped with a light polarizing film PF, and the polarization direction of the light polarizing film PF on two surfaces
Vertically.
The operation principle of individual layer twisted nematic liquid crystal display TN-LCD is as follows：Backlight BL shines, and light passes through first
After a light polarizing film PF of a twisted nematic liquid crystal display TN-LCD, the polarised light propagated along specific direction is formed；Distorting
Before liquid crystal molecule in nematic liquid crystal displays TN-LCD twists, light cannot penetrate another light polarizing film PF；Work as needs
During display, the partial liquid crystal molecule in twisted nematic liquid crystal display TN-LCD is controlled to reverse 90 °, so that the light of the part
Transmission direction change 90 °, it is identical with the polarization direction of another light polarizing film PF, so as to penetrate another light polarizing film PF.
The operation principle of secure display system is as follows：Picture to be shown is divided into multiple figure layers, each figure layer is by one layer
Twisted nematic liquid crystal display TN-LCD shows that the angles of display of all twisted nematic liquid crystal display TN-LCD has overlapping portion
Point, the angular range of the lap is final visible angle scope, is usually 90 ° to 120 °.Visible angle scope with
For position watch display system screen when, can only see the picture that part twisted nematic liquid crystal display TN-LCD is shown,
I.e. other people can not watch complete picture, so as to play the effect shown safely.
However, the display system passes through the heap poststack of multilayer TN-LCD, with the lifting of tonal gradation, its integral brightness is only
It can increase, and cannot reduce, being continuously increased for this briliancy can influence colourity change, reduce the quality of display system.
The content of the invention
The present invention provides a kind of display system of multilayer TN-LCD to solve the above-mentioned problems, the display system bag
Include：Backlight, multilayer TN-LCD, light polarizing film and 1/2 wavelength plate, the backlight are located at the inner side of the display system, multilayer
TN-LCD is stacked gradually from the inner side of the display system toward outside, positioned at the close backlight of innermost one layer of TN-LCD
The light polarizing film is provided with the surface in source, is also set on the surface of the remote backlight of one layer of TN-LCD on the outermost side
The light polarizing film is equipped with, 1/2 wavelength plate is between innermost TN-LCD and outermost TN-LCD.
Specifically, do not have the light polarizing film between innermost TN-LCD and outermost TN-LCD.
Specifically, the TN-LCD is two layers.
The beneficial effects of the present invention are：Display system is during tonal gradation is lifted, and briliancy is first with gray scale etc.
The lifting of level and reduce, then increase with the lifting of tonal gradation, so that colourity changes in particular range, ensure display
Quality.
Brief description of the drawings
Fig. 1 is the schematic diagram of display system of the prior art；
Fig. 2 is the schematic diagram of display system of the present invention；
Fig. 3 is the schematic diagram of detection device of the present invention；
Fig. 4 a are gray scale-luminance variations schematic diagram of first group of display system；
Fig. 4 b are gray scale-luminance variations schematic diagram of second group of display system；
Fig. 4 c are gray scale-luminance variations schematic diagram of the 3rd group of display system；
Fig. 5 is the luminance variations comparison diagram of display system of the present invention and existing display system；
Fig. 6 is one group of gray scale-colourity change schematic diagram of display system of the present invention；
Gray scale-colourity change schematic diagram of display system when Fig. 7 this briliancy of a initial value is 4.5；
Fig. 7 b are gray scale-colourity change schematic diagram of display system when briliancy initial value is 6；
Fig. 7 c are gray scale-colourity change schematic diagram of display system when briliancy initial value is 8.
Embodiment
The present invention is further elaborated below in conjunction with the accompanying drawings：
As shown in Fig. 2, the display system of the present invention includes：Backlight 1,2 (i.e. TN- of multilayer twisted nematic liquid crystal display
LCD), 3 and 1/2 wavelength plate 4 of light polarizing film.Backlight 1 is located at the inner side of display system, multilayer twisted nematic liquid crystal display 2 from
The inner side of display system is stacked gradually toward outside, positioned at the close backlight 1 of innermost one layer of twisted nematic liquid crystal display 2
Surface on be provided with light polarizing film 3, the surface of the remote backlight 1 of one layer of twisted nematic liquid crystal display 2 on the outermost side
On be provided with 3,1/2 wavelength plate 4 of light polarizing film and be located at innermost twisted nematic liquid crystal display 2 and outermost twisted-nematic liquid
Between crystal display 2.In the present embodiment, twisted nematic liquid crystal display 2 is two layers, i.e. the picture of display system is divided into two
Figure layer.As a preferred solution, innermost twisted nematic liquid crystal display 2 is shown with outermost twisted nematic liquid crystal
Do not have light polarizing film between device 2, can so reduce the integral thickness of display system, and the shadow of unnecessary light polarizing film can be eliminated
Ring.In the present embodiment, twisted nematic liquid crystal display 2 is two layers, and safety is realized by two layers of twisted nematic liquid crystal display 2
Display function, can further reduce the thickness of display system.
The present invention tests the briliancy of above-mentioned display system by test device as shown in Figure 3, test device bag
Include：Supporting table 101, speculum 102 and briliancy detector 103.Display system is placed in supporting table 101, and display system goes out
Penetrate angle in 90 ° between direction and the detection direction of briliancy detector 103.The outgoing with display system respectively of speculum 102
Angle at 45 ° between direction and the detection direction of briliancy detector 103.
As shown in fig. 4 a, the briliancy initial value of display system is 4.5cd, when outermost twisted nematic liquid crystal display 2
Tonal gradation start during lifting (usual tonal range be 0-255), the brightness value of display system reduces, after gray scale arrival 110,
The brightness value of display system starts to increase, and when gray scale reaches 190, the brightness value of display system revert to 4.5cd again, and continues
Lifted and increased with tonal gradation.
As shown in Figure 4 b, the briliancy initial value of display system is 6cd, when outermost twisted nematic liquid crystal display 2
When tonal gradation starts lifting, the brightness value of display system reduces, and after gray scale reaches 130, the brightness value of display system starts to increase
Greatly, when gray scale reaches 220, the brightness value of display system revert to 6cd again, and continues to be lifted and increased with tonal gradation.
As illustrated in fig. 4 c, the briliancy initial value of display system is 8cd, when outermost twisted nematic liquid crystal display 2
When tonal gradation starts lifting, the brightness value of display system reduces, and after gray scale reaches 140, the brightness value of display system starts to increase
Greatly, when gray scale reaches 255, the brightness value of display system revert to 8cd again.
As shown in figure 5, I axis represents brightness value, lines R1 represents that innermost twisted nematic liquid crystal is shown in the prior art
The luminance variations situation of device, lines R2 represent the luminance variations situation of the innermost twisted nematic liquid crystal display of the present invention, line
Bar F represents the luminance variations situation of the outermost twisted nematic liquid crystal display of the present invention.It can be obtained with reference to above-mentioned testing result, by
Be provided with 1/2 wavelength plate in the display system of the present invention, the luminance variations curve of innermost twisted nematic liquid crystal display from
First phenomenon is overturn to the second phenomenon, so that the briliancy of most interior and outermost twisted nematic liquid crystal display realizes subtraction
Superposition, therefore, compared with prior art, the brightness value of display system of the invention is not just with tonal gradation from the starting stage
Lifting and increase, but undergo and first reduce with the lifting of tonal gradation, then increase with the lifting of tonal gradation
Process, after increasing to equal with briliancy initial value, then it is in incremental state to continue.
The colourity of display system is tested, as shown in fig. 6, in colourity test, tonal gradation is promoted to 255 from 0,
Wherein, left arrow represents that tonal gradation is promoted to the process of tonal gradation when display system briliancy is minimum value, right arrow from 0
Represent tonal gradation from display system briliancy be minimum value when tonal gradation be promoted to 255 process.
When briliancy is decreased to minimum value from initial value, colourity changes paramount color from the region of low colour temperature (0.21,0.19)
The region (0.31,0.36) of temperature；When briliancy increases to maximum from minimum value, colourity from the region of high color temperature (0.31,
0.36) low color temperature regions (0.21,0.19) are changed to again.
As shown in Fig. 7 a, Fig. 7 b and Fig. 7 c, the initial value of briliancy is respectively 4.5,6.0 and 8.0, when tonal gradation carries respectively
When rising to 110,130 and 140, its colourity be changed to respectively the region (0.31,0.36) of high color temperature, (0.29,0.35) and
(0.28,0.34)；When tonal gradation is promoted to 190,220 and 255 respectively, its colourity is changed to the area of low colour temperature again respectively
Domain (0.21,0.19), (0.20,0.20) and (0.21,0.19).As it can be seen that the variation tendency of colourity and display system briliancy just
Initial value is unrelated.
Display system of the invention can be seen that during tonal gradation is lifted by above-mentioned test result, briliancy
First reduce with the lifting of tonal gradation, then increase with the lifting of tonal gradation, so that colourity is in particular range
Change, ensures display quality.
Embodiment described above, simply the present invention preferred embodiments, be not limit the present invention practical range, therefore it is all according to
The equivalent change or modification that construction, feature and principle described in scope of the present invention patent are done, should all be included in the present invention
In patent claim.
Claims (3)
1. a kind of display system of multilayer TN-LCD, it is characterised in that the display system includes：Backlight, multilayer TN-LCD,
Light polarizing film and 1/2 wavelength plate, the backlight are located at the inner side of the display system, and multilayer TN-LCD is from the display system
Inner side is stacked gradually toward outside, is provided with the surface of the close backlight of innermost one layer of TN-LCD described inclined
Light film, is also equipped with the light polarizing film on the surface of the remote backlight of one layer of TN-LCD on the outermost side, and described 1/2
Wavelength plate is between innermost TN-LCD and outermost TN-LCD.
2. the display system of multilayer TN-LCD as claimed in claim 1, it is characterised in that innermost TN-LCD and outermost
TN-LCD between do not have the light polarizing film.
3. the display system of multilayer TN-LCD as claimed in claim 2, it is characterised in that the TN-LCD is two layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711174028.7A CN107942575B (en) | 2017-11-22 | 2017-11-22 | Display system of multilayer TN-LCD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711174028.7A CN107942575B (en) | 2017-11-22 | 2017-11-22 | Display system of multilayer TN-LCD |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107942575A true CN107942575A (en) | 2018-04-20 |
| CN107942575B CN107942575B (en) | 2021-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711174028.7A Active CN107942575B (en) | 2017-11-22 | 2017-11-22 | Display system of multilayer TN-LCD |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021068661A1 (en) * | 2019-10-08 | 2021-04-15 | 京东方科技集团股份有限公司 | Liquid crystal display panel and driving method therefor, and display apparatus |
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| CN1873502A (en) * | 2005-05-30 | 2006-12-06 | 斯坦雷电气株式会社 | Liquid crystal display device |
| CN101470306A (en) * | 2007-12-29 | 2009-07-01 | 胜华科技股份有限公司 | Double-layer ultra-torsion nematic liquid crystal display panel and its aberration compensation method |
| CN201859284U (en) * | 2010-10-28 | 2011-06-08 | 精电(河源)显示技术有限公司 | Double-layer liquid crystal display panel |
| CN202815382U (en) * | 2012-06-01 | 2013-03-20 | 信利半导体有限公司 | DTSN (Double Super Twisted Nematic) module and liquid crystal compensation box thereof |
| CN103105709A (en) * | 2013-01-30 | 2013-05-15 | 江苏亿成光电科技有限公司 | Multi-content super-wide temperature liquid crystal display |
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2017
- 2017-11-22 CN CN201711174028.7A patent/CN107942575B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1873502A (en) * | 2005-05-30 | 2006-12-06 | 斯坦雷电气株式会社 | Liquid crystal display device |
| CN101470306A (en) * | 2007-12-29 | 2009-07-01 | 胜华科技股份有限公司 | Double-layer ultra-torsion nematic liquid crystal display panel and its aberration compensation method |
| CN201859284U (en) * | 2010-10-28 | 2011-06-08 | 精电(河源)显示技术有限公司 | Double-layer liquid crystal display panel |
| CN202815382U (en) * | 2012-06-01 | 2013-03-20 | 信利半导体有限公司 | DTSN (Double Super Twisted Nematic) module and liquid crystal compensation box thereof |
| CN103105709A (en) * | 2013-01-30 | 2013-05-15 | 江苏亿成光电科技有限公司 | Multi-content super-wide temperature liquid crystal display |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021068661A1 (en) * | 2019-10-08 | 2021-04-15 | 京东方科技集团股份有限公司 | Liquid crystal display panel and driving method therefor, and display apparatus |
| US11347090B2 (en) | 2019-10-08 | 2022-05-31 | Boe Technology Group Co., Ltd. | Liquid crystal display panel, driving method thereof, and display device |
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| Publication number | Publication date |
|---|---|
| CN107942575B (en) | 2021-05-04 |
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