CN102944958A - Semi-transmissive and semi-reflective display device - Google Patents
Semi-transmissive and semi-reflective display device Download PDFInfo
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- CN102944958A CN102944958A CN2012104603988A CN201210460398A CN102944958A CN 102944958 A CN102944958 A CN 102944958A CN 2012104603988 A CN2012104603988 A CN 2012104603988A CN 201210460398 A CN201210460398 A CN 201210460398A CN 102944958 A CN102944958 A CN 102944958A
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Abstract
The invention provides a semi-transmissive and semi-reflective display device which comprises a first substrate, a second substrate corresponding to the first substrate and a liquid crystal layer arranged between the first substrate and the second substrate, wherein a transmissive area and a reflective area are arranged between the first substrate and the second substrate, and liquid crystal boxes for the transmissive area and the reflective area are of the same thickness; pixel electrodes and common electrodes are respectively arranged on areas on the second substrate corresponding to the transmissive area and the reflective area, and the pixel electrodes and the common electrodes are arranged alternately; a transparent electrode is arranged on an area on the first substrate corresponding to the transmissive area, and the transparent electrode is provided with a covering layer for increasing horizontal electric field components in the liquid crystal box for the transmissive area. The technical scheme of the invention can realize the matching of phase delay of light through the transmissive area and the reflective area to achieve a semi-transmissive and semi-reflective display effect.
Description
Technical field
The present invention relates to field of liquid crystal, refer to especially a kind of semi-transparent semi-reflecting liquid crystal indicator.
Background technology
According to the difference that adopts light source type, liquid crystal display can be divided into transmission-type, reflective and Transflective.Transflective display device has the advantage of transmission-type and reflective liquid-crystal display concurrently, both can be in indoor use, and also can be in outdoor application.Therefore, it is widely used in the display device of Portable movable electronic product.
In order to promote the display quality of liquid crystal display, realize higher contrast, faster response time and the wider visual angle of watching, blue phase liquid crystal material with rapid answer characteristic comes into one's own gradually, wherein indigo plant is a kind of a kind of liquid crystal phase between isotropy attitude and cholesteric phase mutually, the temperature range of its existence is very narrow, approximately only has 1 ℃ temperature range.But discovered in recent years exists temperature range greatly to widen through polymer-stabilized later blue phase liquid crystal, substantially can satisfy the serviceability temperature scope as liquid crystal display material.Blue phase liquid crystal display is as the ergastic display of future generation of tool, and have following revolutionary feature: (1) in not alive situation, blue phase liquid crystal is isotropy, and it is large that blue phase liquid crystal display has an angle of visibility, the dark good characteristics of attitude.(2) the theoretical response time of blue phase liquid crystal display can reach below the Millisecond, thereby has improved the response time greatly.(3) because the stabilizing polymer of blue phase liquid crystal is isotropy, so that it does not need other the necessary oriented layer of various liquid crystal display patterns, thereby reduce manufacturing cost in not alive situation, simplified manufacturing process.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of semi-transparent semi-reflecting liquid crystal indicator, by adopting new electrode structure, being complementary of the phase-delay quantity of the light that can realize regional transmission and reflector space by liquid crystal layer, and finally reach semi-transparent semi-reflecting display effect.
For solving the problems of the technologies described above, embodiments of the invention provide a kind of semi-transparent semi-reflecting liquid crystal indicator, comprising: first substrate; The second substrate that is oppositely arranged with described first substrate; Be arranged at the liquid crystal layer between described first substrate and the described second substrate; Comprise between described first substrate and the described second substrate: regional transmission and reflector space; The liquid crystal cell of described regional transmission and described reflector space is thick to be equated;
Be equipped with pixel electrode and public electrode corresponding to the part of regional transmission with corresponding to the part of reflector space on the described second substrate, described pixel electrode and described public electrode interval arrange;
Part corresponding to regional transmission on the described first substrate is provided with a transparency electrode, also is provided with one on the described transparency electrode for the overlayer that strengthens horizontal electric field component in the regional transmission liquid crystal cell.
Wherein, the pixel electrode of described regional transmission and public electrode interval arrange and spacing equates, the pixel electrode of described reflector space and public electrode interval arrange and spacing equates.
Wherein, described tectal thickness is the first preset value, and when the pixel electrode of described regional transmission and the spacing of public electrode were the second preset value, the electric field between whole regional transmission pixel electrode and the public electrode was the horizontal component of electric field of even intensity.
Wherein, the span of described the first preset value is: 1.8 microns ~ 2.4 microns.
Wherein, the liquid crystal of described liquid crystal layer is the positivity liquid crystal;
Also be provided with on the described first substrate and be positioned at described overlayer top, and corresponding to the first oriented layer of whole regional transmission and reflector space;
Also be provided with the second oriented layer that is positioned at corresponding to whole regional transmission and reflector space on the described second substrate.
Wherein, the material of described the first oriented layer and described the second oriented layer is the polyimide material that the positivity liquid crystal is vertically oriented.
Wherein, the liquid crystal of described liquid crystal layer is blue phase liquid crystal.
Wherein, be provided with on the second substrate corresponding to described reflector space the reflection horizon.
Wherein, also be provided with corresponding to whole regional transmission and reflector space on the described second substrate and cover the insulation course in described reflection horizon.
Wherein, also be provided with the first polaroid on the described first substrate, also be provided with the second polaroid on the described second substrate.
Wherein, described tectal material is resin material.
The beneficial effect of technique scheme of the present invention is as follows:
In the such scheme, be provided with a transparency electrode by the part corresponding to regional transmission on first substrate; On the second substrate corresponding to the part of regional transmission with corresponding to the part of reflector space, be equipped with pixel electrode and public electrode, described pixel electrode and described public electrode interval arrange, also be provided with one on the described transparency electrode and be used for strengthening horizontal electric field component in the regional transmission liquid crystal cell, absorb simultaneously or reduce covering (OC) layer of the vertical electric field between described transparency electrode and the described pixel electrode.That is to say, whole regional transmission adopts new electrode structure, reflector space adopts the electrode structure of IPS pattern, thereby can realize that the light of regional transmission and reflector space is by the coupling of the phase-delay quantity of liquid crystal layer, the semi-transparent semi-reflecting display effect of final realization, and adopt the thick structure of single box can simplify the difficulty of technique.
Description of drawings
Fig. 1 is embodiment 1 structural representation during making alive not of the thick semi-transparent semi-reflecting display device of a kind of single box of the present invention;
Structural representation when Fig. 2 is embodiment 1 making alive of the thick semi-transparent semi-reflecting display device of a kind of single box of the present invention;
Fig. 3 is embodiment 2 structural representation during making alive not of the thick semi-transparent semi-reflecting display device of a kind of single box that proposes of the present invention;
Structural representation when Fig. 4 is embodiment 2 making alive of the thick semi-transparent semi-reflecting display device of a kind of single box that proposes of the present invention.
Embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Such as Fig. 1-shown in Figure 4, embodiments of the invention provide a kind of semi-transparent semi-reflecting liquid crystal indicator, comprising: first substrate 2(such as color membrane substrates); The second substrate 10(such as the array base palte that are oppositely arranged with first substrate 2); Be arranged at the liquid crystal layer 5 between first substrate 2 and the second substrate 10; Comprise between first substrate 2 and the second substrate 10: regional transmission and reflector space; The liquid crystal cell of described regional transmission and described reflector space is thick to be equated (thickness that is liquid crystal layer equates);
Wherein, corresponding to the part of regional transmission with corresponding to the part of reflector space, be equipped with pixel electrode and public electrode on the second substrate 10, described pixel electrode and described public electrode interval arrange;
Part corresponding to regional transmission on the first substrate 2 is provided with a transparency electrode 3(such as transparent conductive film ITO); Also be provided with one on the transparency electrode 3 for covering (OC, the Over Coater) layer that strengthens horizontal electric field component in the regional transmission liquid crystal cell, this OC layer can also absorb or reduce simultaneously the vertical electric field between transparency electrode and the pixel electrode; The part of the reflector space corresponding with transparency electrode 3 and OC layer 4 also is covered with the OC layer on the described first substrate 2; Wherein, this OC adopts resin material, finally guarantees thick the equating of liquid crystal cell of regional transmission and reflector space.
This embodiment of the present invention, adopt new electrode structural designs by the part corresponding to regional transmission on first substrate, can realize that the light of regional transmission and reflector space is by the coupling of the phase-delay quantity of liquid crystal layer, the semi-transparent semi-reflecting display effect of final realization, and adopt the thick structure of single box can simplify the difficulty of technique.
In the first implementation column of the present invention, as depicted in figs. 1 and 2:
The liquid crystal of liquid crystal layer 5 is the positivity liquid crystal; Also be provided with on the first substrate 2 and be positioned at OC layer 4 top, and corresponding to the first oriented layer 11 of whole regional transmission and reflector space; Also be provided with the second oriented layer 12 that is positioned at corresponding to whole regional transmission and reflector space on the second substrate 10; Wherein, the material of the first oriented layer 11 and the second oriented layer 12 is polyimide (hereinafter to be referred as the PI) material that the positivity liquid crystal is vertically oriented, as the PI material that adopts the VA pattern that the positivity liquid crystal is vertically oriented, do not need the Rubbing(friction) technique, the tilt angle that the effect of direct dependence PI material makes the positivity liquid crystal molecule namely is vertically oriented near 90 °.
The reflection horizon 8 of reflector space is arranged in the underlay substrate of second substrate 10; Insulation course 13 corresponding to whole regional transmission and reflector space and covering reflection horizon 8 also is set on this second substrate 10; 8 both sides, reflection horizon can be filled and led up, make thick the equating of whole liquid crystal cell of regional transmission and reflector space.
Also be provided with the first polaroid 1 on the described first substrate 2, also be provided with the second polaroid 9 on the described second substrate 10, make the light that enters liquid crystal layer produce polarization state.
The pixel electrode 6 that the regional transmission interval arranges and the spacing between the public electrode 7 equate and be d1, and the pixel electrode 6 that the reflector space interval arranges and the spacing between the public electrode 7 equate and be d2; Wherein, d1 can equal d2, also can be less than d2; And this public electrode 7 can be the transparency electrode that transparent conductive material is made.
As shown in Figure 1, when not powering up, when d1=d2 or d1＜d2, regional transmission and reflector space all do not have electric field, because the setting of the first oriented layer 11 and the second oriented layer 12, liquid crystal in the positivity liquid crystal layer 5 all is vertically oriented, and the light of regional transmission and reflector space will can not produce phase-delay quantity through the positivity liquid crystal layer that is vertically oriented.Because the polarization direction of emergent ray does not change, so will be blocked fully by the first polaroid 1 on the first substrate 2, realizes the demonstration of dark attitude.
As shown in Figure 2, when powering up, when d1=d2 or d1＜d2, at regional transmission, because the transparency electrode on the first substrate 2 and the setting of OC layer 4, strengthened the electric field intensity away from the electrode position place on the second substrate 10, by optimizing the thickness of OC layer, such as the arbitrary value between 1.8 microns ~ 2.4 microns, and when obtaining by experiment spacing d1 between pixel electrode and the public electrode and being the second preset value, has uniform horizontal component of electric field in the regional transmission in the whole liquid crystal layer, because the setting of this OC layer 4, can absorb or stop the vertical electric field between the pixel electrode on this transparency electrode and the second substrate 10, and strengthen horizontal electric field component in the regional transmission liquid crystal cell, can in the liquid crystal cell of whole transmission area, produce so more uniformly transverse horizontal electric field of electric field intensity; This OC layer 4 is preferably resin material and makes;
Above-mentioned experimental technique specifically can carry out according to following method of testing:
For the panel that comprises specific a kind of positivity liquid crystal, determine the size of thickness and above-mentioned second preset value of OC layer: at first, make different test panels according to predefined several values, and, all fill a kind of positivity liquid crystal in these test panels.Secondly, draw the V-T(voltage-transmitance of regional transmission and the reflector space of these several test panels) curve characteristic, if the regional transmission of a test panel is consistent in error range with the curve characteristic of reflector space, illustrate that then light is roughly 2 times of phase-delay quantity of echo area through the phase-delay quantity of regional transmission, the size of the thickness of the OC layer of this test panel and the spacing d1 between pixel electrode and the public electrode just can be used as the reference value in the actual production so.In embodiments of the present invention above-mentioned value is not added restriction, and with can be so that the phase-delay quantity that the light of the regional transmission of same pixel region, reflector space is produced by the positivity liquid crystal layer is complementary is as the criterion in the actual production.
Electric field in the reflector space then along the direction vertical with first substrate 2 and second substrate 10 along with weakening gradually away from the electrode on the second substrate 10.Near the liquid crystal molecule horizontal alignment of second substrate 10, and still be vertically oriented near the liquid crystal molecule of first substrate 2, still, because the light of echo area will pass through liquid crystal cell for twice, so the actual light path of the light of reflector space can be 2 times of unidirectional light path.
If the phase-delay quantity of the polarized light component by the horizontal direction of liquid crystal molecule is decided: the light of regional transmission by the optical path difference that liquid crystal layer produces is: △ n1 * dn, wherein, △ n1 is refractive index poor of the refractive index of major axis of liquid crystal of regional transmission and minor axis, and dn is that light is through the liquid crystal light path;
And reflector space light by the optical path difference that liquid crystal layer produces is: △ n2 * dm, and wherein, △ n2 is refractive index poor of refractive index and minor axis of major axis of the liquid crystal of reflector space, dm is that light passes through the liquid crystal light path;
If realize anti-the demonstration, need phase-delay quantity and light the phase-delay quantity by the liquid crystal of reflector space of light by the liquid crystal of regional transmission to be complementary;
For regional transmission and reflector space, if whole regional transmission △ n of liquid crystal under the effect of horizontal component of electric field is 2 times of reflector space, be △ n1/ △ n2=2, the light path of regional transmission light by liquid crystal is reflector space light by half of the light path of liquid crystal, i.e. dn=dm/2; Thick such as whole liquid crystal cell is d, dn=d, and dm=2 * unidirectional light path=2d, wherein unidirectional light path=d sees on the whole structure, △ n1 * dn=△ n2 * dm; The phase-delay quantity of the liquid crystal of regional transmission and the liquid crystal of reflector space is complementary, and finally reaches semi-transparent semi-reflecting display effect.
In the second implementation column of the present invention, as shown in Figure 3 and Figure 4, different from above-mentioned the first embodiment is that the liquid crystal of described liquid crystal layer 5 is blue phase liquid crystal.
As shown in Figure 3, blue phase liquid crystal is the isotropy attitude when not powering up.Incident ray will can not produce phase-delay quantity through the blue phase liquid crystal of isotropy attitude.Therefore, can save the first oriented layer 11 and the second oriented layer 12, simplify manufacture craft.
As shown in Figure 4, at regional transmission, the present invention adopts the electrode structure of new liquid crystal mode, at color membrane substrates transparency electrode (such as the ITO layer) is set, and at its surface increase one deck OC layer, can in the liquid crystal cell of whole transmission area, produce so more uniformly transverse horizontal electric field.
In the echo area, the present invention adopts the electrode structure of common IPS pattern, electric field intensity can be reduced gradually by second substrate 10 to first substrate 2, therefore can produce result as shown in Figure 4, near the blue phase liquid crystal molecular level orientation of second substrate, and still be the isotropy attitude near the liquid crystal molecule of first substrate 2.
But, because the light of echo area will pass through liquid crystal cell twice, so the actual distance of the light of reflector space is 2 times of unidirectional light path.Can make the light of transmission area and echo area identical by the phase-delay quantity that liquid crystal layer produces by optimizing the thickness of OC layer, just can realize the coupling of the phase-delay quantity of transmission area and echo area, and finally reach semi-transparent semi-reflecting display effect.
Electrode structural designs of the present invention just can realize semi-transparent semi-reflecting display effect with a kind of simple method.Adopt the thick structure of single box can simplify the difficulty of technique.
The above is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away 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 (11)
1. a semi-transparent semi-reflecting liquid crystal indicator comprises: first substrate; The second substrate that is oppositely arranged with described first substrate; Be arranged at the liquid crystal layer between described first substrate and the described second substrate; Comprise between described first substrate and the described second substrate: regional transmission and reflector space; The liquid crystal cell of described regional transmission and described reflector space is thick to be equated; It is characterized in that,
Be equipped with pixel electrode and public electrode corresponding to the part of regional transmission with corresponding to the part of reflector space on the described second substrate, described pixel electrode and described public electrode interval arrange;
Part corresponding to regional transmission on the described first substrate is provided with a transparency electrode, also is provided with one on the described transparency electrode for the overlayer that strengthens horizontal electric field component in the regional transmission liquid crystal cell.
2. semi-transparent semi-reflecting liquid crystal indicator according to claim 1 is characterized in that, the pixel electrode of described regional transmission and public electrode interval arrange and spacing equates, the pixel electrode of described reflector space and public electrode interval arrange and spacing equates.
3. semi-transparent semi-reflecting liquid crystal indicator according to claim 1, it is characterized in that, described tectal thickness is the first preset value, when the pixel electrode of described regional transmission and the spacing of public electrode were the second preset value, the electric field between whole regional transmission pixel electrode and the public electrode was the horizontal component of electric field of even intensity.
4. semi-transparent semi-reflecting liquid crystal indicator according to claim 3 is characterized in that, the span of described the first preset value is: 1.8 microns ~ 2.4 microns.
5. semi-transparent semi-reflecting liquid crystal indicator according to claim 1 is characterized in that, the liquid crystal of described liquid crystal layer is the positivity liquid crystal;
On the described first substrate in the first oriented layer that also is provided with near a side of described liquid crystal layer corresponding to whole regional transmission and reflector space;
Also be provided with the second oriented layer that is positioned at corresponding to whole regional transmission and reflector space in the side near described liquid crystal layer on the described second substrate.
6. semi-transparent semi-reflecting liquid crystal indicator according to claim 5 is characterized in that, the material of described the first oriented layer and described the second oriented layer is the polyimide material that the positivity liquid crystal is vertically oriented.
7. semi-transparent semi-reflecting liquid crystal indicator according to claim 1 is characterized in that, the liquid crystal of described liquid crystal layer is blue phase liquid crystal.
8. described semi-transparent semi-reflecting liquid crystal indicator is characterized in that according to claim 1-7, be provided with on the described second substrate corresponding to described reflector space the reflection horizon.
9. semi-transparent semi-reflecting liquid crystal indicator according to claim 8 is characterized in that, also is provided with corresponding to reflector space and regional transmission on the described second substrate and covers the insulation course in described reflection horizon.
10. semi-transparent semi-reflecting liquid crystal indicator according to claim 1 is characterized in that, also is provided with the first polaroid on the described first substrate, also is provided with the second polaroid on the described second substrate.
11. semi-transparent semi-reflecting liquid crystal indicator according to claim 1 is characterized in that, described tectal material is resin material.
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| CN103278975A (en) * | 2013-05-27 | 2013-09-04 | 京东方科技集团股份有限公司 | Semi-transmission semi-reflection liquid crystal display panel, array substrate, colorized film substrate and manufacturing method |
| CN107247349A (en) * | 2017-05-25 | 2017-10-13 | 菏泽学院 | A kind of multi-functional continuous visual angle controllable display |
| CN110794625A (en) * | 2019-10-18 | 2020-02-14 | 深圳市华星光电技术有限公司 | Semi-transparent semi-reflection liquid crystal display device |
| US10649266B2 (en) | 2016-06-24 | 2020-05-12 | Boe Technology Group Co., Ltd. | Liquid crystal display and display device |
| US10705368B2 (en) | 2015-10-13 | 2020-07-07 | Boe Technology Group Co., Ltd. | Display panel and manufacturing method thereof |
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