CN101201494A - Liquid crystal display apparatus - Google Patents
Liquid crystal display apparatus Download PDFInfo
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- CN101201494A CN101201494A CNA2006101575177A CN200610157517A CN101201494A CN 101201494 A CN101201494 A CN 101201494A CN A2006101575177 A CNA2006101575177 A CN A2006101575177A CN 200610157517 A CN200610157517 A CN 200610157517A CN 101201494 A CN101201494 A CN 101201494A
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- liquid crystal
- crystal indicator
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- polaroid
- compensation film
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Abstract
The invention relates to a liquid crystal display device and comprises at least an optical membrane; the optical membrane intermingles with material which can absorb visible light with the wavelength more than 700 nanometer. The brightness of the liquid crystal display device of the invention is decreased when presenting dark-state picture and then the contrast of the liquid crystal display device is increased.
Description
Technical field
The present invention relates to a kind of liquid crystal indicator.
Background technology
Liquid crystal indicator is a kind of non-self-emission display apparatus, it shows generally passing through or do not realize by liquid crystal panel by control light beam that light source sends, therefore need to adopt light source and corresponding guiding device usually, as module backlight, described module backlight can be with the described liquid crystal panel of the beam direction that its light source sent.
Seeing also Fig. 1, is a kind of liquid crystal indicator side structure synoptic diagram of prior art.Described liquid crystal indicator 10 comprises a liquid crystal panel 100 and a module 110 backlight.Described module backlight 110 provides planar backlight for described liquid crystal panel 100.Described liquid crystal panel 100 comprises one first polaroid 101, one first substrate 103, a liquid crystal layer 105, one second substrate 107 and one second polaroid 109 that is cascading from top to bottom.Described first polaroid 101 is orthogonal with the polarization direction of described second polaroid 109.
On first, second substrate 103,107 of described liquid crystal panel 100, load a voltage, when described liquid crystal indicator 10 shows dark attitude picture, under electric field action, the long axis direction of the liquid crystal molecule in the middle of the described liquid crystal layer 105 rotates to the direction vertical with described first, second substrate 103,107, near but the liquid crystal molecule described first, second substrate 103,107, because be subjected to the influence of boundary effect, its long axis direction and described first, second substrate 103,107 have a pitch angle.Because the existence at described pitch angle, through the polarization light of described second polaroid 109 through described liquid crystal layer 105 time, produce a positive phase delay, thereby make it the time through described first polaroid 101, can not fully be absorbed, so described liquid crystal indicator 10 has light leakage phenomena to take place when showing dark attitude picture.
In order to address the above problem, present liquid crystal indicator is provided with phase compensation film usually, as shown in Figure 2, compares with liquid crystal indicator 10, and described liquid crystal indicator 20 further comprises one first phase compensation film 202 and one second phase compensation film 208.Described first phase compensation film 202 is arranged between described first polaroid 201 and described first substrate 203, and described second phase compensation film 208 is arranged between described second substrate 207 and described second polaroid 209.Described first phase compensation film 202 all is negative phase compensation film with described second phase compensation film 208, and its optical axis direction is orthogonal.
Light is converted into a polarization light after described second polaroid 209, described polarization light is through behind described second phase compensation film 208, produce a negative phase delay, when described light arrives described liquid crystal layer 205 centres, produce a positive phase delay, described minus phase postpones to postpone to cancel out each other with described positive phase; Light from the middle of the described liquid crystal layer 205 when passing described liquid crystal layer 205, also produce a positive phase delay, described positive phase delay and light postpone to offset through the minus phase that described first compensate film 202 backs produce, thereby make described light by described first polaroid, 201 basic absorption.
So, at present the twisted nematic liquid crystals display device is when showing dark attitude picture, because the phase delay difference that the light of different wave length produces in same medium, after injecting described second polaroid 209 greater than the visible light of 700 nanometers, the wavelength that sends from module backlight changes a polarization light into, described polarization light is passing through described second phase compensation film 208 successively, behind described liquid crystal layer 205 and described first phase compensation film 202, drawing its phase delay by experiment can not cancel out each other, and causes described wavelength can't fully be absorbed by described first polaroid 201 greater than the visible light of 700 nanometers.Therefore, described liquid crystal indicator 20 is when showing dark attitude picture, and display brightness increases, thereby described liquid crystal indicator 20 contrasts descend.
Summary of the invention
In order to solve the low problem of liquid crystal indicator contrast in the prior art, the invention provides a kind of liquid crystal indicator that improves contrast.
A kind of liquid crystal indicator, it comprises at least one blooming piece, mix in the described blooming piece can absorbing wavelength greater than the material of the visible light of 700 nanometers.
Compared with prior art, the present invention's liquid crystal indicator can effectively absorb wavelength that light source the sends visible light greater than 700 nanometers, makes described liquid crystal indicator when showing dark attitude picture, and brightness descends, thereby has improved contrast.Simultaneous contrast's raising helps reducing the influence that described liquid crystal indicator causes the visual angle because of the gray-scale inversion characteristic.
Description of drawings
Fig. 1 is a kind of liquid crystal indicator side structure synoptic diagram of prior art.
Fig. 2 is a kind of liquid crystal indicator side structure synoptic diagram that phase compensation film is arranged of prior art.
Fig. 3 is the liquid crystal indicator first embodiment side structure synoptic diagram of the present invention.
Fig. 4 is the liquid crystal indicator second embodiment side structure synoptic diagram of the present invention.
Fig. 5 is liquid crystal indicator the 3rd an embodiment side structure synoptic diagram of the present invention.
Fig. 6 is liquid crystal indicator the 4th an embodiment side structure synoptic diagram of the present invention.
Fig. 7 is liquid crystal indicator the 5th an embodiment side structure synoptic diagram of the present invention.
Embodiment
Seeing also Fig. 3, is the liquid crystal indicator first embodiment side structure synoptic diagram of the present invention.Described liquid crystal indicator 30 comprises a liquid crystal panel 300 and a module 310 backlight.Described module backlight 310 provides planar backlight for described liquid crystal panel 300.
Described liquid crystal panel 300 comprises one first polaroid 301, one first phase compensation film 302, one first substrate 303, a liquid crystal layer 305, one second substrate 307, one second phase compensation film 308 and one second polaroid 309 that is cascading from top to bottom.Described first polaroid 301 is orthogonal with the polarization direction of described second polaroid 309.Described first phase compensation film 302 all is negative phase compensation film with described second phase compensation film 308, and its optical axis direction is orthogonal.
Described module backlight 310 comprises one first diffusion sheet 312, a blast sheet 314, one second diffusion sheet 315, a light guide plate 317, a reflector plate 318 and a light source 319, described light guide plate 317 comprises an exiting surface 3171 and an incidence surface 3172, described first diffusion sheet 312, described blast sheet 314 and described second diffusion sheet 315 are cascadingly set on described light guide plate 317 exiting surfaces 3,171 one sides, described reflector plate 318 is arranged at and deviates from described light guide plate 317 exiting surfaces 3,171 one sides, and described light source 319 is arranged at described light guide plate 317 incidence surfaces 3,172 one sides.Be doped with in described first diffusion sheet 312 and described second diffusion sheet 315 can absorbing wavelength greater than the material of the visible light of 700 nanometers, described material can be can absorbing wavelength greater than the pigment or the scintilla material of the visible light of 700 nanometers.Described scintilla material can be carbon nano-tube (Carbon Nanotube) or nanostructured zinc oxide.
The light that described light source 319 sends changes planar light into after described light guide plate 317, after described planar light is injected described second diffusion sheet 315, wavelength is absorbed by described second diffusion sheet 315 and described first diffusion sheet 312 greater than the visible light of 700 nanometers, does not have the visible light of wavelength greater than 700 nanometers in the light of described liquid crystal panel 300 thereby described module backlight 310 is injected.When described liquid crystal indicator 30 shows dark attitude picture, light changes a polarization light into through after described second polaroid 309, described polarization light is cancelled each other through described second phase compensation film 308, described liquid crystal layer 305 and described first phase compensation film, 302 back phase delays successively, thereby described light is fully absorbed by described first polaroid 301, has reduced the light leak of described liquid crystal indicator 30.Therefore, the brightness when showing dark attitude picture of described liquid crystal indicator 30 reduces.
Described liquid crystal indicator 30 done penetrating spectrum measurement, when described liquid crystal indicator 30 shows dark attitude picture brightness be the liquid crystal indicator 20 of prior art when showing dark attitude picture brightness 91%; When showing bright attitude picture, the liquid crystal indicator 20 that its brightness drops to prior art when showing bright attitude picture brightness 98.2%, therefore described liquid crystal indicator 30 contrasts are brought up to 98.2%/91%=108% of liquid crystal indicator 20 contrasts of prior art, and the raising rate is 8%.
Compared with prior art, add in first diffusion sheet 301 of liquid crystal indicator 30 of the present invention and second diffusion sheet 305 and can absorb wavelength that light source 319 sends material greater than the visible light of 700 nanometers, thereby described part visible light is fully absorbed, make described liquid crystal indicator 30 when showing dark attitude picture, brightness descends, and contrast improves.Simultaneous contrast's raising helps reducing the influence that described liquid crystal indicator causes the visual angle because of the gray-scale inversion characteristic.
Seeing also Fig. 4, is the liquid crystal indicator second embodiment side structure synoptic diagram of the present invention.Described liquid crystal indicator 40 comprises a liquid crystal panel 400 and a module 410 backlight.Described module backlight 410 provides planar backlight for described liquid crystal panel 400.
Described liquid crystal panel 400 comprises one first polaroid 401, one first phase compensation film 402, one first substrate 403, a liquid crystal layer 405, one second substrate 407, one second phase compensation film 408 and one second polaroid 409 that is cascading from top to bottom.Described first polaroid 401 is orthogonal with the polarization direction of described second polaroid 409.Described first phase compensation film 402 all is negative phase compensation film with described second phase compensation film 408, and its optical axis direction is orthogonal.
Described module backlight 410 comprises one first diffusion sheet 412, a blast sheet 414, one second diffusion sheet 415, a light guide plate 417, a reflector plate 418 and a light source 419, described light guide plate 417 comprises an exiting surface 4171 and an incidence surface 4172, described first diffusion sheet 412, described blast sheet 414 and described second diffusion sheet 415 are cascadingly set on described light guide plate 417 exiting surfaces 4,171 one sides, described reflector plate 418 is arranged at and deviates from described light guide plate 417 exiting surfaces 4,171 one sides, and described light source 419 is arranged at described light guide plate 417 incidence surfaces 4,172 one sides.Be doped with in the described blast sheet 414 can absorbing wavelength greater than the material of the visible light of 700 nanometers, described material can be can absorbing wavelength greater than the pigment or the scintilla material of the visible light of 700 nanometers.Described scintilla material can be carbon nano-tube or nanostructured zinc oxide.
The light that described light source 419 sends changes planar light into after described light guide plate 417, after described planar light is injected described blast sheet 414, wavelength is absorbed by described blast sheet 414 greater than the visible light of 700 nanometers, does not have the visible light of wavelength greater than 700 nanometers in the light of described liquid crystal panel 400 thereby described module backlight 410 is injected.When described liquid crystal indicator 40 when showing dark attitude picture, light changes a polarization light into through after described second polaroid 409, described polarization light is cancelled out each other through described second phase compensation film 408, described liquid crystal layer 405 and described first phase compensation film, 402 back phase delays successively, thereby described light is fully absorbed by described first polaroid 401, reduced the light leak of described liquid crystal indicator 40.Therefore, the brightness when showing dark attitude picture of described liquid crystal indicator 40 reduces.
Seeing also Fig. 5, is liquid crystal indicator the 3rd embodiment side structure synoptic diagram of the present invention.Described liquid crystal indicator 50 comprises a liquid crystal panel 500 and a module 510 backlight.Described module backlight 510 provides planar backlight for described liquid crystal panel 500.
Described liquid crystal panel 500 comprises one first polaroid 501, one first phase compensation film 502, one first substrate 503, a liquid crystal layer 505, one second substrate 507, one second phase compensation film 508 and one second polaroid 509 that is cascading from top to bottom.Described first polaroid 501 is orthogonal with the polarization direction of described second polaroid 509.Described first phase compensation film 502 all is negative phase compensation film with described second phase compensation film 508, and its optical axis direction is orthogonal.
Described module backlight 510 comprises one first diffusion sheet 512, one blast sheet 514, one second diffusion sheet 515, one optical filter 516, one light guide plate 517, one reflector plate 518 and a light source 519, described light guide plate 517 comprises an exiting surface 5171 and an incidence surface 5172, described first diffusion sheet 512, described blast sheet 514, described second diffusion sheet 515 and described optical filter 516 are cascadingly set on described light guide plate 517 exiting surfaces 5,171 one sides, described reflector plate 518 is arranged at and deviates from described light guide plate 517 exiting surfaces 5,171 one sides, and described light source 519 is arranged at described light guide plate 517 incidence surfaces 5,172 one sides.Be doped with in the described optical filter 516 can absorbing wavelength greater than the material of the visible light of 700 nanometers, described material can be can absorbing wavelength greater than the pigment or the scintilla material of the visible light of 700 nanometers.Described scintilla material can be carbon nano-tube or nanostructured zinc oxide.
The light that described light source 519 sends changes planar light into through described light guide plate 517, described planar light is through behind the described optical filter 516, wavelength is absorbed greater than the visible light of 700 nanometers, does not have the visible light of wavelength greater than 700 nanometers in the light of described liquid crystal panel 500 thereby described module backlight 510 is injected.When described liquid crystal indicator 50 when showing dark attitude picture, light changes a polarization light into through described second polaroid 509, after described polarization light passes through described second phase compensation film 508, described liquid crystal layer 505 and described first phase compensation film 502 successively, phase delay is cancelled out each other, thereby described light is fully absorbed by described first polaroid 501, and then has reduced the light leak brightness of described liquid crystal indicator 50.Therefore, the brightness when dark attitude picture of described liquid crystal indicator 50 reduces, and helps improving described contrast of LCD degree.
Seeing also Fig. 6, is liquid crystal indicator the 4th embodiment side structure synoptic diagram of the present invention.Described liquid crystal indicator 60 comprises a liquid crystal panel 600 and a module 610 backlight.Described module backlight 610 provides planar backlight for described liquid crystal panel 600.
Described liquid crystal panel 600 comprises one first polaroid 601, one first phase compensation film 602, one first substrate 603, a liquid crystal layer 605, one second substrate 607, one second phase compensation film 608 and one second polaroid 609 that is cascading from top to bottom.Described first phase compensation film 602 all is negative phase compensation film with described second phase compensation film 608, and its optical axis direction is orthogonal.Described first polaroid 601 is orthogonal with the polarization direction of described second polaroid 609, and be doped with can absorbing wavelength greater than the material of the visible light of 700 nanometers, described material can be can absorbing wavelength greater than the pigment or the scintilla material of the visible light of 700 nanometers.Described scintilla material can be carbon nano-tube or nanostructured zinc oxide.
The planar light that described module backlight 610 sends changes a polarization light into through after described second polaroid 609, and wavelength is absorbed greater than the visible light of 700 nanometers, described polarization light is cancelled out each other through described second phase compensation film 608, described liquid crystal layer 605 and described first phase compensation film, 602 back phase delays successively, thereby the visible light of all wavelengths is fully absorbed by described first polaroid 601, reduced the light leak of described liquid crystal indicator 60.Therefore, the brightness when showing dark attitude picture of described liquid crystal indicator 60 reduces.
Seeing also Fig. 7, is liquid crystal indicator the 5th embodiment side structure synoptic diagram of the present invention.Described liquid crystal indicator 70 comprises a liquid crystal panel 700 and a module 710 backlight.Described module backlight 710 provides planar backlight for described liquid crystal panel 700.
Described liquid crystal panel 700 comprises one first polaroid 701, one first phase compensation film 702, one first substrate 703, a liquid crystal layer 705, one second substrate 707, one second phase compensation film 708 and one second polaroid 709 that is cascading from top to bottom.Described first polaroid 701 is orthogonal with the polarization direction of described second polaroid 709.Described first phase compensation film 702 all is negative phase compensation film with described second phase compensation film 708, its optical axis direction is orthogonal, and be doped with can absorbing wavelength greater than the material of the visible light of 700 nanometers, described material can be can absorbing wavelength greater than the pigment or the scintilla material of the visible light of 700 nanometers.Described scintilla material can be carbon nano-tube or nanostructured zinc oxide.
The planar light that described module backlight 710 sends changes a polarization light into through after described second polaroid 709, described polarization light is grown up through described second phase compensation film 708, described liquid crystal layer 705 and described first phase compensation film, 702 postwaves successively and is absorbed in the visible light of 700 nanometers, and wavelength is cancelled out each other less than the visible light phase delay of 700 nanometers, thereby light is fully absorbed by described first polaroid 701, reduced the light leak of described liquid crystal indicator 70.Therefore, the brightness when showing dark attitude picture of described liquid crystal indicator 70 reduces.
The optical filter position of liquid crystal indicator of the present invention can be arranged on other position of described module backlight as required, described can absorbing wavelength also can being entrained in other assembly of liquid crystal indicator greater than the material of the visible light of 700 nanometers, it is described to be not limited to above-mentioned embodiment.
Claims (10)
1. liquid crystal indicator, it comprises at least one blooming piece, it is characterized in that: mix in the described blooming piece can absorbing wavelength greater than the material of the visible light of 700 nanometers.
2. liquid crystal indicator as claimed in claim 1 is characterized in that: described can absorbing wavelength be pigment or scintilla material greater than the material of the visible light of 700 nanometers.
3. liquid crystal indicator as claimed in claim 2 is characterized in that: described scintilla material is carbon nano-tube or nanostructured zinc oxide.
4. liquid crystal indicator as claimed in claim 1 is characterized in that: described blooming piece is a diffusion sheet.
5. liquid crystal indicator as claimed in claim 4, it is characterized in that: described liquid crystal indicator also comprises a blast sheet and a light guide plate, described light guide plate comprises an exiting surface, described diffusion sheet is arranged at described light guide plate exiting surface one side, and described blast sheet is arranged at described diffusion sheet and deviates from described light guide plate one side.
6. liquid crystal indicator as claimed in claim 1 is characterized in that: described blooming piece is the blast sheet.
7. liquid crystal indicator as claimed in claim 1 is characterized in that: described blooming piece is an optical filter.
8. liquid crystal indicator as claimed in claim 1 is characterized in that: described blooming piece is a polaroid.
9. liquid crystal indicator as claimed in claim 1 is characterized in that: described blooming piece is a phase compensation film.
10. liquid crystal indicator as claimed in claim 9, it is characterized in that: described liquid crystal indicator also comprises first, second substrate and first, second polaroid, be provided with a liquid crystal layer in the middle of described first, second substrate, described phase compensation film is arranged at the side that described first, second substrate deviates from described liquid crystal layer respectively, and described first, second polaroid is arranged at the side that described phase compensation film deviates from described liquid crystal layer respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101575177A CN101201494A (en) | 2006-12-13 | 2006-12-13 | Liquid crystal display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101575177A CN101201494A (en) | 2006-12-13 | 2006-12-13 | Liquid crystal display apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101201494A true CN101201494A (en) | 2008-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101575177A Pending CN101201494A (en) | 2006-12-13 | 2006-12-13 | Liquid crystal display apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102460282A (en) * | 2009-04-24 | 2012-05-16 | 富士胶片株式会社 | Liquid crystal display apparatus and liquid crystal cell |
| CN111051936A (en) * | 2017-09-26 | 2020-04-21 | 株式会社Lg化学 | Optical film, optical element, and imaging device |
| CN112782887A (en) * | 2019-11-07 | 2021-05-11 | 合肥鑫晟光电科技有限公司 | Display panel and display device |
-
2006
- 2006-12-13 CN CNA2006101575177A patent/CN101201494A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102460282A (en) * | 2009-04-24 | 2012-05-16 | 富士胶片株式会社 | Liquid crystal display apparatus and liquid crystal cell |
| US8715792B2 (en) | 2009-04-24 | 2014-05-06 | Fujifilm Corporation | Liquid-crystal display device and liquid-crystal cell |
| CN102460282B (en) * | 2009-04-24 | 2015-01-21 | 富士胶片株式会社 | Liquid crystal display apparatus and liquid crystal cell |
| CN111051936A (en) * | 2017-09-26 | 2020-04-21 | 株式会社Lg化学 | Optical film, optical element, and imaging device |
| US11366259B2 (en) | 2017-09-26 | 2022-06-21 | Lg Chem, Ltd. | Optical film, optical element, and imaging device |
| CN112782887A (en) * | 2019-11-07 | 2021-05-11 | 合肥鑫晟光电科技有限公司 | Display panel and display device |
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