CN102937762B - Transflective liquid crystal display device - Google Patents
Transflective liquid crystal display device Download PDFInfo
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- CN102937762B CN102937762B CN201210460322.5A CN201210460322A CN102937762B CN 102937762 B CN102937762 B CN 102937762B CN 201210460322 A CN201210460322 A CN 201210460322A CN 102937762 B CN102937762 B CN 102937762B
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Abstract
The invention provides a transflective liquid crystal display device which comprises a first substrate, a second substrate and a liquid crystal layer. The second substrate is opposite to the first substrate, and the liquid crystal layer is arranged between the first substrate and the second substrate. A transmitting area and a reflecting area are reserved between the first substrate and the second substrate, and liquid crystal gaps of the transmitting area and the reflecting area are the same. The first substrate is provided with a transparent electrode corresponding to the whole transmitting area and the whole reflecting area, a covering layer is arranged on one side of the transparent electrode close to the liquid crystal layer; the part of the second substrate, corresponding to the reflecting area, is provided with a first pixel electrode, and the part of the second substrate, corresponding to the transmitting area, is provided with a plurality of second pixel electrodes at intervals and common electrodes below the second pixel electrodes, and a first insulating layer corresponding to the whole transmitting area and the whole reflecting area is arranged between the second pixel electrodes and the common electrodes. The transflective liquid crystal display device has a transflective display effect.
Description
Technical field
The present invention relates to liquid crystal indicator field, refer to a kind of Transflective liquid crystal display device especially.
Background technology
Panel of LCD is generally become box-like with array base palte by color membrane substrates, is packaged with liquid crystal layer in the space between two substrates; Because liquid crystal molecule self is not luminous, so display panel needs light source to show image, according to the difference adopting light source type, liquid crystal display can be divided into transmission-type, reflective and Transflective.
Wherein, the display panels of transmission-type, mainly using backlight as light source, is provided with backlight after liquid crystal panel, the pixel electrode on array base palte be transparency electrode as transmission area, the ght transmission being conducive to backlight through liquid crystal layer to show image;
Reflecting type liquid crystal display panel is mainly using front light-source or external light source as light source, and its array base palte adopts metal or other reflecting electrodes with good reflection elastomeric material as echo area, is suitable for the light reflection by front light-source or external light source;
Transreflective liquid crystal display panel then can be considered the combination of transmission-type and reflecting type liquid crystal display panel, and array base palte is both provided with echo area, is provided with transmission area again, and backlight and front light-source or external light source can be utilized to show simultaneously.
The advantage of transmissive liquid crystal display panel can show bright image under dark environment, but shortcoming is permeable light, and to account for the ratio of backlight emission of light less, backlight utilization factor is not high, and just need for improving display brightness the brightness increasing substantially backlight, therefore energy consumption is high.
The advantage of reflecting type liquid crystal display panel to utilize external light source, and power consumption is relatively low, but shortcoming in the dark cannot show image due to the dependence to external light source.
Transreflective liquid crystal display panel has the advantage of transmission-type and reflecting type liquid crystal display panel concurrently, both can show bright image under dark environment, indoor use, also can in outdoor application.Therefore, it is widely used in the display device of Portable movable electronic product, as mobile phone, and digital camera, palm PC, the mobile products such as GPRS.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of Transflective liquid crystal display device, adopts new electrode structure, can realize semi-transparent semi-reflecting display effect.Meanwhile, the electrode structural designs that echo area adopts expands display view angle, improves contrast, adopts structure that single box is thick can the difficulty of Simplified flowsheet.
For solving the problems of the technologies described above, embodiments of the invention provide a kind of Transflective liquid crystal display device, comprising: first substrate; The second substrate be oppositely arranged with first substrate; Be arranged at the liquid crystal layer between first substrate and second substrate; Comprise between first substrate and second substrate: regional transmission and reflector space; The liquid crystal cell of regional transmission and reflector space is thick equal; Described first substrate is provided with transparency electrode corresponding to whole regional transmission and reflector space; The side of the close described liquid crystal layer of described transparency electrode is provided with overlayer; The part corresponding to described reflector space above described second substrate is provided with first pixel electrode; The part of described regional transmission is corresponded to above described second substrate, be provided with spaced multiple second pixel electrode, and the public electrode be arranged at below described second pixel electrode, there is between described second pixel electrode and described public electrode the first insulation course corresponding to whole regional transmission and reflector space.
Wherein, the width of described first pixel electrode is the first value;
Described multiple second equidistant interval of pixel electrode is arranged, and the spacing distance between adjacent two the second pixel electrodes is the second value;
The size of described first value and described second value is: when light is matched by the phase-delay quantity of the liquid crystal of described reflector space by the phase-delay quantity of the liquid crystal of described regional transmission and light, corresponding size.
Wherein, the liquid crystal of described liquid crystal layer is positivity liquid crystal;
The described tectal side near described liquid crystal layer on described first substrate is also provided with the first oriented layer corresponding to whole regional transmission and reflector space;
Side near described liquid crystal layer on described second substrate is also provided with corresponding to whole regional transmission and reflector space and covers the second oriented layer of described first pixel electrode and described second pixel electrode.
Wherein, first, second oriented layer described is adopt to make described positivity liquid crystal be the polyimide material be vertically oriented when not powering up.
Wherein, the part described second substrate corresponding to described reflector space is provided with reflection horizon.
Wherein, described second substrate be also provided with corresponding to whole regional transmission and reflector space and cover second insulation course in described reflection horizon, described public electrode is positioned on described second insulation course.
Wherein, described first substrate is also provided with the first polaroid, described second substrate is also provided with the second polaroid.
Wherein, described tectal material is resin material.
The beneficial effect of technique scheme of the present invention is as follows:
In such scheme, by the design of the electrode structure to regional transmission and reflector space, semi-transparent semi-reflecting display effect can be realized.Meanwhile, the electrode structural designs that echo area adopts expands display view angle, improves contrast, adopts structure that single box is thick can the difficulty of Simplified flowsheet.
Accompanying drawing explanation
Fig. 1 be the thick semi-transparent semi-reflecting display of single box of the present invention embodiment 1 not making alive time structural representation;
Structural representation when Fig. 2 is embodiment 1 making alive of single box of the present invention thick semi-transparent semi-reflecting display.
Embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
As Figure 1-Figure 2, embodiments of the invention provide a kind of Transflective liquid crystal display device, comprising: first substrate 22; The second substrate 301 be oppositely arranged with first substrate 22; Be arranged at the liquid crystal layer 25 between first substrate 22 and second substrate 301; Comprise between first substrate 22 and second substrate 301: regional transmission and reflector space; The liquid crystal cell of regional transmission and reflector space is thick equal;
As shown in Figure 1, have liquid crystal layer 25 between first substrate 22 and second substrate 301, whole part first substrate 22 corresponding to regional transmission and reflector space is provided with transparency electrode 23; Covering (OC) layer 24 be positioned on transparency electrode 23 is also provided with above first substrate 22; The part corresponding to reflector space above second substrate 301 is provided with first pixel electrode 26; The part of regional transmission is corresponded to above second substrate 301, be provided with spaced multiple second pixel electrode 304, and be provided with the first insulation course 27 be positioned at below the second pixel electrode 304, and be positioned at the public electrode 28 below the second pixel electrode 304; Wherein, the first insulation course 27 is covered with whole regional transmission and reflector space, not only for the second pixel electrode and public electrode 28 being insulated, and makes the liquid crystal cell of regional transmission and reflector space thick equal.
Wherein, the width of the first pixel electrode 26 is the first value; Multiple second pixel electrode 304 equidistantly interval is arranged, and the spacing distance between adjacent two the second pixel electrodes 304 is the second value;
The size of described first value and described second value is: when light is matched by the phase-delay quantity of the liquid crystal of reflector space by the phase-delay quantity of the liquid crystal of regional transmission and light, corresponding size.
As shown in Figure 1, liquid crystal layer 25 is positivity liquid crystal, first substrate 22 is also provided with near the side of liquid crystal layer and is positioned at above OC layer 24, and correspond to the first oriented layer 302 of whole regional transmission and reflector space;
Second substrate 301 be also provided with corresponding to whole regional transmission and reflector space and cover the second oriented layer 303 of the first pixel electrode 26 and the second pixel electrode 304.Preferably, described ground floor oriented layer 302 and described second oriented layer 303 adopt and make described positivity liquid crystal be the PI(polyimide be vertically oriented when not powering up) material.First substrate 22 is also provided with the first polaroid 21, second substrate 301 is also provided with the second polaroid 300; Second substrate 301 corresponds to the part of reflector space, also be provided with reflection horizon 29, described second substrate 301 is also provided with the second insulation course 305, described second insulation course 305 corresponds to whole regional transmission and reflector space, and covers the reflection horizon 29 of described reflector space.
At regional transmission and reflector space, embodiments of the invention at first substrate 22(as color membrane substrates) and second substrate 301(as array base palte) oriented layer all use the material that when not powering up, liquid crystal is vertically oriented, as polyimide (PI) can reduce dark-state light leak, improve contrast.The light of regional transmission and reflector space can not produce optical path difference through the liquid crystal layer be vertically oriented.Because the polarization direction of emergent ray does not change, so will be blocked completely by color film polaroid (i.e. above-mentioned first polaroid 21), realize the display of dark-state.
As shown in Figure 2, at regional transmission, embodiments of the invention adopt the electrode structure of new liquid crystal mode, at first substrate 22(as color membrane substrates) on the color film public electrode of transparency electrode 23(is set, ITO layer), and increase one deck OC layer 24(over coater layer on its surface, overlayer).Preferably, described OC layer is one deck resin material, for strengthening the horizontal component of electric field, and weakens the vertical component of electric field, can produce more uniform transverse horizontal electric field like this in the liquid crystal cell of whole transmission area.During making alive, the positivity liquid crystal molecule of transmission area gradually becomes horizontal due to the impact by horizontal component of electric field, produces the phase delay of horizontal direction.
At reflector space, embodiments of the invention adopt the electrode structure of ASV pattern, during making alive, the arranging situation that the positivity liquid crystal molecule of echo area gradually becomes as shown in Figure 2 due to the impact by ASV mode electric field, light will produce the phase delay of less horizontal direction by the liquid crystal of reflector space.
Postpone for △ n1 if light can produce larger horizontal phase by the positivity liquid crystal of regional transmission under horizontal component of electric field effect, light is postponed for △ n2 by the horizontal phase that the positivity liquid crystal of reflector space is less because the impact being subject to ASV mode electric field can produce under tilting electric field effect.
Can by the optimization (adjusting the size of above-mentioned first value and the second value) to regional transmission pixel electrode spacing and echo area pixel electrode width, make the light through regional transmission can produce phase delay more more than echo area, to realize anti-display, light is matched by the phase-delay quantity of the liquid crystal of reflector space by the phase-delay quantity of the liquid crystal of regional transmission and light;
For regional transmission and reflector space, by adjusting the size of above-mentioned first value and the second value, whole regional transmission light under the effect of horizontal component of electric field is made to be 2 times of reflector space by the phase-delay quantity of liquid crystal, i.e. △ n1/ △ n2=2, regional transmission light is the half of reflector space light by the light path of liquid crystal by the light path of liquid crystal, i.e. dn=dm/2; Whole structure is seen, △ n1 × dn=△ n2 × dm; The phase-delay quantity of the liquid crystal of regional transmission and the liquid crystal of reflector space matches, and finally reaches semi-transparent semi-reflecting display effect.
It should be noted that: the concrete size of above-mentioned first value and the second value can experimentally obtain, but being not limited to is a certain occurrence, specifically can according to following method of testing for the panel comprising specific a kind of positivity liquid crystal, determine the size of the first value and the second value: first, different test panels is manufactured according to the several values preset, further, above-mentioned specific a kind of positivity liquid crystal is all filled in these test panels.Secondly, draw the regional transmission of these test panels and the V-T(voltage-transmitance of reflector space) curve characteristic, if the regional transmission of a test panel is consistent in error range with the curve characteristic of reflector space, then illustrate that light is roughly 2 times of the phase-delay quantity of echo area through the phase-delay quantity of regional transmission, be so worth just can as the reference value in actual production for above-mentioned first value and second of this test panel.In embodiments of the present invention restriction is not added to above-mentioned value, and be as the criterion so that the regional transmission of same pixel region, the light of reflector space can be made in actual production to be matched by the phase-delay quantity that positivity liquid crystal layer produces.
In the above embodiment of the present invention, by the change of the electrode mode to regional transmission and reflector space, semi-transparent semi-reflecting display effect can be realized.Meanwhile, the electrode structural designs of the ASV pattern that echo area adopts expands display view angle, improves contrast.Adopt structure that single box is thick can the difficulty of Simplified flowsheet.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. a Transflective liquid crystal display device, comprising: first substrate; The second substrate be oppositely arranged with first substrate; Be arranged at the liquid crystal layer between first substrate and second substrate; Comprise between first substrate and second substrate: regional transmission and reflector space; The liquid crystal cell of regional transmission and reflector space is thick equal; It is characterized in that,
Described first substrate is provided with transparency electrode corresponding to whole regional transmission and reflector space;
The side of the close described liquid crystal layer of described transparency electrode is provided with the horizontal component for strengthening electric field, and weakens the overlayer of the vertical component of electric field, and described overlayer is resin material;
The part corresponding to described reflector space above described second substrate is provided with first pixel electrode;
The part of described regional transmission is corresponded to above described second substrate, be provided with spaced multiple second pixel electrode, and the public electrode be arranged at below described second pixel electrode, there is between described second pixel electrode and described public electrode the first insulation course corresponding to whole regional transmission and reflector space.
2. Transflective liquid crystal display device according to claim 1, is characterized in that, the width of described first pixel electrode is the first value;
Described multiple second equidistant interval of pixel electrode is arranged, and the spacing distance between adjacent two the second pixel electrodes is the second value;
The size of described first value and described second value is: when light is matched by the phase-delay quantity of the liquid crystal of described reflector space by the phase-delay quantity of the liquid crystal of described regional transmission and light, corresponding size.
3. Transflective liquid crystal display device according to claim 1, is characterized in that, the liquid crystal of described liquid crystal layer is positivity liquid crystal;
The described tectal side near described liquid crystal layer on described first substrate is also provided with the first oriented layer corresponding to whole regional transmission and reflector space;
Side near described liquid crystal layer on described second substrate is also provided with corresponding to whole regional transmission and reflector space and covers the second oriented layer of described first pixel electrode and described second pixel electrode.
4. Transflective liquid crystal display device according to claim 3, is characterized in that, first, second oriented layer described is adopt to make described positivity liquid crystal be the polyimide material be vertically oriented when not powering up.
5. the Transflective liquid crystal display device according to claim 1-4, is characterized in that, the part described second substrate corresponding to described reflector space is provided with reflection horizon.
6. Transflective liquid crystal display device according to claim 5, it is characterized in that, described second substrate be also provided with corresponding to whole regional transmission and reflector space and cover second insulation course in described reflection horizon, described public electrode is positioned on described second insulation course.
7. Transflective liquid crystal display device according to claim 1, is characterized in that, described first substrate is also provided with the first polaroid, and described second substrate is also provided with the second polaroid.
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| CN201210460322.5A CN102937762B (en) | 2012-11-15 | 2012-11-15 | Transflective liquid crystal display device |
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| CN201210460322.5A CN102937762B (en) | 2012-11-15 | 2012-11-15 | Transflective liquid crystal display device |
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| CN102937762B true CN102937762B (en) | 2015-01-07 |
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| CN103207474B (en) * | 2013-03-28 | 2015-05-27 | 京东方科技集团股份有限公司 | Half-transmitting half-reflecting liquid crystal display panel and display utilizing same |
| CN104460129A (en) * | 2014-12-10 | 2015-03-25 | 深圳市华星光电技术有限公司 | Transflective liquid crystal display panel and liquid crystal display |
| CN109828405B (en) * | 2019-03-14 | 2022-01-11 | 京东方科技集团股份有限公司 | Color film substrate and manufacturing method thereof, display panel and display device |
| CN110412793B (en) * | 2019-07-05 | 2021-07-23 | 昆山龙腾光电股份有限公司 | Display panel and display device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1862328A (en) * | 2005-05-11 | 2006-11-15 | 京东方显示器科技公司 | Fringe field switching mode transflective liquid crystal display |
| TW200914961A (en) * | 2007-09-28 | 2009-04-01 | Innolux Display Corp | Transflective liquid crystal display |
| CN102012588A (en) * | 2010-12-16 | 2011-04-13 | 四川大学 | Single box thickness transflective blue-phase liquid crystal display |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1862328A (en) * | 2005-05-11 | 2006-11-15 | 京东方显示器科技公司 | Fringe field switching mode transflective liquid crystal display |
| TW200914961A (en) * | 2007-09-28 | 2009-04-01 | Innolux Display Corp | Transflective liquid crystal display |
| CN102012588A (en) * | 2010-12-16 | 2011-04-13 | 四川大学 | Single box thickness transflective blue-phase liquid crystal display |
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