CN102081268B - Single-box thick transflective blue phase liquid crystal display with low operating voltage and high optical efficiency - Google Patents
Single-box thick transflective blue phase liquid crystal display with low operating voltage and high optical efficiency Download PDFInfo
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- CN102081268B CN102081268B CN2011100548309A CN201110054830A CN102081268B CN 102081268 B CN102081268 B CN 102081268B CN 2011100548309 A CN2011100548309 A CN 2011100548309A CN 201110054830 A CN201110054830 A CN 201110054830A CN 102081268 B CN102081268 B CN 102081268B
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- liquid crystal
- transparent wedge
- upper substrate
- blue phase
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Abstract
The invention discloses a single-box thick transflective blue phase liquid crystal display with low operating voltage and high optical efficiency. The transflective liquid crystal display is characterized in that a transmissive area and a reflecting area have the same liquid crystal box thickness; an upper substrate comprises an upper substrate glass layer, an upper substrate quarter wave plate, an upper substrate half wave plate and an upper substrate polarizing plate; a lower substrate comprises a lower substrate glass layer, a lower substrate quarter wave plate, a lower substrate half wave plate and a lower substrate polarizing plate; and a reflecting layer of the reflecting area is arranged inside the lower substrate glass substrate. A bottom edge for arranging transparent wedge electrodes is arranged on the upper substrate glass layer and the lower substrate glass layer, and an area opposite to the right angle edge of the transparent wedge electrodes is the transmissive area, and an area opposite to the oblique angle edge of the transparent wedge electrodes is the reflecting area. A gap between adjacent transparent wedge electrodes on the transmissive area is smaller than a gap between adjacent transparent wedge electrodes on the reflecting area, and the transparent wedge electrodes comprise alternately arranged pixel electrodes and common electrode. By adjusting the liquid crystal box thickness, the height and the bottom edge width of the transparent wedge electrodes and the gaps between the adjacent transparent wedge electrodes on the transmissive area and on the reflecting area, the single-box thick blue phase liquid crystal display has the characteristics of low operating voltage, high optical efficiency, wide visual angle and the like.
Description
Technical field
The present invention relates to field of liquid crystal display, more particularly, the present invention relates to anti-field of liquid crystal display, refer to adopt the transflective lcd of blue phase liquid crystal especially.
Background technology
Transflective lcd adopts the backlight light-emitting mode because of its transmission area, and the light source mode of surround lighting is adopted in the echo area, and making all has good readability and color saturation indoor with the open air, is widely used in the various electronic display units.Transflective lcd can be divided into thick transflective lcd of single box and dual-box thick transflective lcd by its principle of work; The thick transflective lcd of wherein single box is easy to make; But transmission area and echo area phase delay are not easy coupling; Dual-box thick transflective lcd transmission area and echo area phase delay are mated easily, but make difficulty.For transflective lcd, it is the standard of weighing its display effect that fast response time, high-contrast, wide visual angle and less look split.The liquid crystal that the tradition transflective lcd adopts can be divided into three kinds of nematic phase, smectic phase and cholesteric phases, through the electrode structure of transmission area and echo area in the design pixel, can obtain good display and key in technical field herein and describe paragraph.
For the fast moving scene, LCD phenomenons such as streaking and look split can occur usually, all be because the response time fast inadequately.For the look that solves transflective lcd splits problem, colored sequential technology has been proposed, do not need color filter film thereby adopt red-green-blue LED to do backlight at transmission area.Adopt colored sequential technology can make optical efficiency and resolution increase about three times; Make the power consumption of transflective lcd lower; But this Technology Need liquid crystal response time is less than 1ms, and the conventional liquid crystal response time is generally 10ms, does not reach the response time requirement of colored sequential technology.
Than traditional liquid crystal, blue phase liquid crystal has plurality of advantages, can address the above problem and better effect is arranged in other respects: blue phase liquid crystal does not need oriented layer, makes manufacturing process simplify greatly; The response time of blue phase liquid crystal helps to reduce the fuzzy of moving image and can utilize red, green and blue LED to do backlight less than 1ms, realizes that colored sequential shows; Blue phase liquid crystal optical property when making alive not is isotropic, and this makes that the visual angle of blue phase liquid crystal display is very wide and symmetrical.But the universal existence of blue phase liquid crystal display two big obstacles: the driving voltage of (1) blue phase liquid crystal display is too high, is unfavorable for being applied in the portable electronic display device; (2) optical efficiency of blue phase liquid crystal display is low, and viewing effect is not good.
Summary of the invention
The present invention proposes the thick anti-blue phase liquid crystal display of the single box of the high optical efficiency of a kind of low-work voltage; Comprise: upper substrate 10 and infrabasal plate 20; Parallel each other placement, liquid crystal layer 30 is between two substrates up and down, and each pixel is divided into transmission area and echo area; The liquid crystal layer 30 of transmission area and echo area all uses identical blue phase liquid crystal material, and transmission area adopts identical thickness of liquid crystal box with the echo area
dUpper substrate 10 comprises upper substrate glassy layer 11, upper substrate quarter-wave plate 12, upper substrate 1/2nd wave plates 13 and upper substrate polaroid 14; Infrabasal plate 20 comprises lower baseplate glass layer 21, infrabasal plate quarter-wave plate 22, infrabasal plate 1/2nd wave plates 23 and infrabasal plate polaroid 24; Wherein upper substrate quarter-wave plate 12 is parallel to each other with infrabasal plate quarter-wave plate 22 optical axis directions; Upper substrate 1/2nd wave plates 13 are parallel to each other with infrabasal plate 1/2nd wave plates 23 optical axis directions, and upper substrate polaroid 14 is vertical each other with infrabasal plate polaroid 24 light transmission shaft directions; The base of transparent wedge electrode 25 places on the upper substrate glassy layer 11 upper and lower base plate glass layers 21; Transparent wedge electrode 25 right-angle side region facing are transmission area; Limit, transparent wedge electrode 25 oblique angle region facing is the echo area, and the top of transparent wedge electrode 25 can also can be arc for pointed; Can also be the plane; The top of transparent wedge electrode 25 can contact upper substrate glassy layer 11 or lower baseplate glass layer 21, also can certain distance be arranged, the height of promptly transparent wedge electrode 25 with upper substrate glassy layer 11 or lower baseplate glass layer 21
hBe less than or equal to thickness of liquid crystal box
d, transparent wedge electrode 25 is made up of pixel capacitors (P) and public electrode (C) again alternately, and the gap of transmission area adjacent transparent wedge electrode 25
l TGap less than echo area adjacent transparent wedge electrode 25
l R, the reflection horizon 26 of echo area places lower baseplate glass layer 21 inside;
Preferably, thickness of liquid crystal box
d≤5 μ m and
d>=1 μ m.
Preferably, said liquid crystal cell is thick
D=4 μ m.
Preferably, the height of transparent wedge electrode 25
h≤5 μ m and
h>=1 μ m.
Preferably, the height of said transparent wedge electrode 25
h=4 μ m.
Preferably, the base width of transparent wedge electrode 25
w≤4 μ m and
w>=1 μ m.
Preferably, the base width of said transparent wedge electrode 25
w=1 μ m.
Preferably, the gap of 25 of transmission area adjacent two transparent wedge electrodes
l T=3 μ m.
Preferably, the gap of 25 of echo area adjacent two transparent wedge electrodes
l R=5 μ m.Key in technical field herein and describe paragraph.
Description of drawings
Fig. 1 is the structural drawing of the thick anti-blue phase liquid crystal display of the single box of the high optical efficiency of low-work voltage of the present invention.
Accompanying drawing 2 is the transmissivity and the reflectance curve figure of the thick anti-blue phase liquid crystal display of the single box of the high optical efficiency of low-work voltage of the present invention.
Accompanying drawing 3 is the full vision area contrast contour map of the thick anti-blue phase liquid crystal display of the single box of the high optical efficiency of low-work voltage of the present invention (light wavelength lambda=550nm).
Shown by reference numeral in above-mentioned each accompanying drawing is:
10 upper substrates, 11 upper substrate glassy layers, 12 upper substrate quarter-wave plates, 13 upper substrates, 1/2nd wave plates; 14 upper substrate polaroids, 20 infrabasal plates, 21 lower baseplate glass layers; 22 infrabasal plate quarter-wave plates, 23 infrabasal plates, 1/2nd wave plates, 24 infrabasal plate polaroids; 25 transparent wedge electrodes, reflection horizon, 26 echo area, 30 liquid crystal layers.
Specific embodiment
Specify the embodiment of the thick anti-blue phase liquid crystal display of the single box of the high optical efficiency of a kind of low-work voltage of the present invention's proposition below, the present invention is further specifically described.Be necessary to be pointed out that at this; Following examples only are used for the present invention and do further explanation; Can not be interpreted as restriction to protection domain of the present invention; This art skilled person makes some nonessential improvement and adjustment according to the invention described above content to the present invention, still belongs to protection scope of the present invention.
One embodiment of the invention propose the thick anti-blue phase liquid crystal display of the single box of the high optical efficiency of a kind of low-work voltage.Shown in accompanying drawing 1, this transmission area that passes through anti-blue phase liquid crystal display has identical thickness with the echo area
dUpper substrate 10 comprises upper substrate glassy layer 11, upper substrate quarter-wave plate 12, upper substrate 1/2nd wave plates 13 and upper substrate polaroid 14; Infrabasal plate 20 comprises lower baseplate glass layer 21, infrabasal plate quarter-wave plate 22, infrabasal plate 1/2nd wave plates 23 and infrabasal plate polaroid 24; Upper substrate quarter-wave plate 12 is parallel to each other with infrabasal plate quarter-wave plate 22 optical axis directions; Upper substrate 1/2nd wave plates 13 are parallel to each other with infrabasal plate 1/2nd wave plates 23 optical axis directions, and upper substrate polaroid 14 is vertical each other with infrabasal plate polaroid 24 light transmission shaft directions; Transparent wedge electrode 25 right-angle side region facing are transmission area; Limit, transparent wedge electrode 25 oblique angle region facing is the echo area, and the top of transparent wedge electrode 25 can also can be arc for pointed; Can also be the plane; The top of transparent wedge electrode 25 can contact upper substrate glassy layer 11 or lower baseplate glass layer 21, also can certain distance be arranged, the height of promptly transparent wedge electrode 25 with upper substrate glassy layer 11 or lower baseplate glass layer 21
hBe less than or equal to thickness of liquid crystal box
d, transparent wedge electrode 25 is made up of pixel capacitors (P) and public electrode (C) again alternately, and the gap of transmission area adjacent transparent wedge electrode 25
l TGap greater than echo area adjacent transparent wedge electrode 25
l RReflection horizon, echo area 26 places lower baseplate glass layer 21 inside; The liquid crystal layer 30 of transmission area and echo area all uses identical blue phase liquid crystal material.
Setting infrabasal plate polaroid 24 light transmission shaft directions is 0 °; Infrabasal plate 1/2nd wave plates 23 optical axis directions are 75 °; Infrabasal plate quarter-wave plate 22 optical axis directions are-75 °; Upper substrate quarter-wave plate 12 optical axis directions are-75 °, and upper substrate 1/2nd wave plates 13 optical axis directions are 75 °, and upper substrate polaroid 14 light transmission shaft directions are 90 °.
In the present embodiment, transparent wedge electrode 25 tops are pointed, are right-angle triangle; Relative at transmission area two transparent wedge electrode 25 right-angle sides, produce very strong horizontal component of electric field, make backlight make the bigger phase delay of generation through transmission area liquid crystal layer 30; Two transparent wedge electrodes, 25 oblique angles are just relative in the echo area; The parallel electric field that forms, horizontal component be less than transmission area, causes phase delay that surround lighting passes through echo area liquid crystal layer 30 less than transmission area.Because backlight through transmission area liquid crystal layer 30 once, and surround lighting passes the liquid crystal layer 30 twice of echo area, through the adjustment thickness of liquid crystal box
D, Transparent wedge electrode 25 height
H,The gap of transmission area adjacent transparent wedge electrode 25
l TAnd the gap of echo area adjacent transparent wedge electrode 25
l R, realized that transmission area and echo area phase delay equate, obtain low-work voltage, high optical efficiency, wide visual angle, transmission area and the good blue phase liquid crystal display of echo area electro-optical characteristic curves coupling.
The characterisitic parameter of executing the liquid crystal material that uses in the example of the present invention is: greatest birefringence
=0.2, Kerr constanr
K=12.68
Nm/ V
2, thickness of liquid crystal box
d=4
μ mThe base of transparent wedge electrode 25 is wide
w 1=1
μ m, height
h=4 μ m, the gap that transmission area adjacent two transparent wedge electrodes are 25
l T=3 μ m, the gap that echo area adjacent two transparent wedge electrodes are 25
l R=5 μ m.
Accompanying drawing 3 is the full vision area contrast contour map of the thick anti-blue phase liquid crystal display of the single box of the high optical efficiency of low-work voltage of the present invention.Because blue phase liquid crystal is under the condition that does not apply voltage, the liquid crystal optics isotropy is in conjunction with upper substrate quarter-wave plate 12; Upper substrate 1/2nd wave plates 13; Infrabasal plate 1/2nd wave plates 23, infrabasal plate quarter-wave plate 22 makes whole liquid crystal cell demonstrate an extraordinary dark attitude.Applying under the condition of voltage, blue phase liquid crystal becomes optical anisotropy, and the optical axis of liquid-crystal refractive-index ellipsoid is along the direction of electric field.Because the use of transparent wedge electrode 25 makes that the horizontal component of electric field of transmission area and echo area is all very big, the big and optical phase put-off increase of the birefringent horizontal component that causes electric field to be induced, the optical efficiency that obtains at last also increases.Can know the visual angle broad and the symmetry of the thick anti-blue phase liquid crystal display of the single box of the high optical efficiency of low-work voltage of the present invention by accompanying drawing 3.Particularly, transmission area and echo area contrast are that the curve of 10:1 has almost covered whole vision area, shown in accompanying drawing 3 (a); The echo area is under the situation that does not add any compensate film, and contrast curves is that the vision area of 10:1 has reached 40
o, shown in accompanying drawing 3 (b).
Claims (8)
1. the thick anti-blue phase liquid crystal display of the single box of the high optical efficiency of a low-work voltage comprises:
Upper substrate (10) and infrabasal plate (20); Parallel placement; Liquid crystal layer (30) is up and down between the two substrates; Each pixel is divided into transmission area and echo area, and the liquid crystal layer (30) of transmission area and echo area all uses identical blue phase liquid crystal material, and transmission area adopts identical thickness of liquid crystal box d with the echo area;
Upper substrate (10) comprises upper substrate glassy layer (11), upper substrate quarter-wave plate (12), upper substrate 1/2nd wave plates (13) and upper substrate polaroid (14);
Infrabasal plate (20) comprises lower baseplate glass layer (21), infrabasal plate quarter-wave plate (22), infrabasal plate 1/2nd wave plates (23) and infrabasal plate polaroid (24);
Wherein upper substrate quarter-wave plate (12) and infrabasal plate quarter-wave plate (22) optical axis direction are parallel to each other; Upper substrate 1/2nd wave plates (13) and infrabasal plate 1/2nd wave plates (23) optical axis direction are parallel to each other, and upper substrate polaroid (14) is vertical each other with infrabasal plate polaroid (24) light transmission shaft direction;
Transparent wedge electrode (25) right-angle side region facing is a transmission area; Transparent wedge electrode (25) limit, oblique angle region facing is the echo area, and the top of transparent wedge electrode (25) can also can be arc for pointed; Can also be the plane; The top of transparent wedge electrode (25) can contact upper substrate glassy layer (11) or lower baseplate glass layer (21), also can certain distance be arranged with upper substrate glassy layer (11) or lower baseplate glass layer (21), and the height h of promptly transparent wedge electrode (25) is less than or equal to thickness of liquid crystal box d; Transparent wedge electrode (25) is made up of pixel capacitors (P) and public electrode (C) again alternately, and the gap l of transmission area adjacent transparent wedge electrode (25)
TGap l less than echo area adjacent transparent wedge electrode (25)
R, the reflection horizon of echo area (26) place lower baseplate glass layer (21) inside.
2. the thick anti-blue phase liquid crystal display of the single box of the high optical efficiency of a kind of low-work voltage according to claim 1 is characterized in that said thickness of liquid crystal box d≤5 μ m and d>=1 μ m.
3. the thick anti-blue phase liquid crystal display of the single box of the high optical efficiency of a kind of low-work voltage according to claim 1 is characterized in that said thickness of liquid crystal box d=4 μ m.
4. the thick anti-blue phase liquid crystal display of the single box of the high optical efficiency of a kind of low-work voltage according to claim 1 is characterized in that the height h of said transparent wedge electrode (25)≤5 μ m and h>=1 μ m.
5. the thick anti-blue phase liquid crystal display of the single box of the high optical efficiency of a kind of low-work voltage according to claim 1 is characterized in that the height h=4 μ m of transparent wedge electrode (25).
6. the thick anti-blue phase liquid crystal display of the single box of the high optical efficiency of a kind of low-work voltage according to claim 1 is characterized in that the base width w of transparent wedge electrode (25)≤4 μ m and w>=1 μ m.
7. the thick anti-blue phase liquid crystal display of the single box of the high optical efficiency of a kind of low-work voltage according to claim 1 is characterized in that the base width w=1 μ m of said transparent wedge electrode (25).
8. the thick anti-blue phase liquid crystal display of the single box of the high optical efficiency of a kind of low-work voltage according to claim 1 is characterized in that the gap l of said transmission area adjacent transparent wedge electrode (25)
T=3 μ m, the gap l of echo area adjacent transparent wedge electrode (25)
R=5 μ m.
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| CN2011100548309A CN102081268B (en) | 2011-03-09 | 2011-03-09 | Single-box thick transflective blue phase liquid crystal display with low operating voltage and high optical efficiency |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102231027B (en) * | 2011-06-29 | 2013-04-03 | 四川大学 | Transmission-reflection blue-phase liquid crystal display with corrugated electrode |
| CN102645798B (en) * | 2012-02-27 | 2014-10-15 | 京东方科技集团股份有限公司 | Display device and manufacturing method thereof |
| CN102662282B (en) * | 2012-05-11 | 2015-01-21 | 京东方科技集团股份有限公司 | Blue-phase liquid crystal panel and display device |
| CN102778778B (en) * | 2012-07-05 | 2014-08-06 | 京东方科技集团股份有限公司 | Transflective liquid crystal display panel and transflective type liquid crystal displayer |
| CN102789087B (en) * | 2012-07-26 | 2015-07-08 | 京东方科技集团股份有限公司 | Blue-phase LCD device and display equipment |
| CN102799019B (en) * | 2012-08-13 | 2015-03-18 | 昆山龙腾光电有限公司 | Blue-phase liquid crystal display device and production method thereof |
| CN102830540B (en) * | 2012-09-07 | 2015-07-15 | 京东方科技集团股份有限公司 | Blue phase liquid crystal panel and liquid crystal display applying same |
| CN102879958A (en) * | 2012-09-28 | 2013-01-16 | 京东方科技集团股份有限公司 | Array substrate, method for manufacturing same and liquid crystal display device |
| CN102998840A (en) * | 2012-12-12 | 2013-03-27 | 京东方科技集团股份有限公司 | Display panel and display device comprising same |
| CN103529601B (en) * | 2013-11-08 | 2016-02-03 | 河北工业大学 | The blue phase liquid crystal display of low driving voltage high permeability |
| CN104849924B (en) * | 2015-05-21 | 2017-09-15 | 武汉华星光电技术有限公司 | Liquid crystal display and its liquid crystal display module |
| CN105068351B (en) * | 2015-08-28 | 2018-01-09 | 武汉华星光电技术有限公司 | Blue phase liquid crystal display module, blue phase liquid crystal display and preparation method thereof |
| CN110501841A (en) * | 2019-09-23 | 2019-11-26 | 北京航空航天大学 | A kind of triangular prism dielectric layer protrusion reflective liquid-crystal display |
| CN113267926B (en) * | 2021-05-31 | 2023-05-16 | 北京京东方光电科技有限公司 | Display panel, display device and polaroid |
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| KR101472082B1 (en) * | 2008-10-10 | 2014-12-16 | 삼성디스플레이 주식회사 | Liquid crystal display and method of fabricating the same |
| US8964161B2 (en) * | 2009-06-16 | 2015-02-24 | Kent State University | Electro-optical device and method for controlling color with polymer stabilized liquid crystal |
| CN101943815A (en) * | 2009-07-07 | 2011-01-12 | 友达光电股份有限公司 | Liquid crystal display device and manufacturing method of electrode substrate thereof |
| CN101976002B (en) * | 2010-11-02 | 2012-07-18 | 昆山龙腾光电有限公司 | Blue phase liquid crystal display panel and liquid crystal display device |
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