CN101986189A - Reflective liquid crystal display panel - Google Patents
Reflective liquid crystal display panel Download PDFInfo
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- CN101986189A CN101986189A CN2010105302531A CN201010530253A CN101986189A CN 101986189 A CN101986189 A CN 101986189A CN 2010105302531 A CN2010105302531 A CN 2010105302531A CN 201010530253 A CN201010530253 A CN 201010530253A CN 101986189 A CN101986189 A CN 101986189A
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Abstract
The invention provides a reflective liquid crystal display (LCS) panel, which is characterized by at least comprising: a first substrate; a plurality of thin film diodes installed on the first substrate; an insulating layer covering the first substrate and having an opening for exposing a source/drain electrode of each thin film diode; a specular layer covering the first substrate and covered by the insulating layer in an insulating manner; a plurality of pattern transparent conductive layers positioned above the insulating layer, electrically insulated with each other and respectively electrically connected to one source/drain electrode exposed from the opening; a second substrate; a transparent electrode layer positioned on one surface of the second substrate and between the first substrate and the second substrate; and a liquid crystal layer positioned between a reflecting electrode layer and the transparent electrode layer, wherein the degree of scattered reflection of the specular layer is very low, so that a contrast ratio of the reflective LCD panel is greatly raised.
Description
Technical field
The present invention relates to a kind of reflecting type liquid crystal display panel, relate in particular to a kind of reflecting type liquid crystal display panel that is applicable in the liquid crystal indicator.
Background technology
General liquid crystal indicator is to adopt the transmissive liquid crystal display screen, just below the transmissive liquid crystal display screen, be provided with module backlight, module backlight is lighted the light source of back as liquid crystal indicator, and the transmissive liquid crystal display screen has then been played the part of the role of light source switch.This module backlight can adopt light emitting diode (LED), cold cathode ray tube (CCFL), EL cold light film etc., and the light that generally transmits is white light, and we just can see the content on the liquid crystal display like this.Because light arrives human eye through liquid crystal board, therefore this LCDs just is called " transmission-type liquid crystal display ".
The advantage of transmission display panel is to make the user can see the even brightness screen under dim situation, but entire aphototropism mould must all keep Chang Liang always when work, otherwise screen is just seen can be pitch-dark, therefore also must open backlight in broad day, this electric quantity consumption for palm PC is undoubtedly huge, and be kind of a waste, therefore in newer palm PC, all abandon adopting this LCDs, the substitute is reflection type lcd panel.
Reflective display screen is loaded onto reflectorized material below liquid crystal board, replace the luminescent material of transmission display panel, utilizes ambient light as light source, and it utilizes the light through direct reflection to illuminate screen.The reflective liquid-crystal display of existing diffusion modulation type, at not alive state,, present the arrangement of property out of order because of liquid crystal is subjected to irregular polymkeric substance side chain influence, incident ray can be reflected by the minute surface of liquid crystal layer below, and then presents uniform bright attitude disperse state.When impressed voltage was non-vanishing, liquid crystal was subjected to electric field effects and marshalling, when using metal material to be used as the reflection horizon as if infrabasal plate, when avoiding the angle of direct reflection, then can be used as dark attitude and used in the design.
Fig. 1 is the synoptic diagram that illustrates present reflective display screen, and the diagrammatic cross-section that circle 102 is indicated among Fig. 1 is illustrated in Fig. 2.As shown in Figure 2, on substrate 104, has thin film diode (not illustrating), insulation course 106 is positioned on the substrate 104, insulation course 106 has a source/drain electrode 108 that opening exposes thin film diode, and the metallic reflector 110 of pattern picture and transparency electrode 112 are positioned on the insulation course 106 and electric connection source/drain electrode 108.As shown in Figure 1, the metallic reflector 110 of pattern picture and transparency electrode 112 have constituted pixel electrode 103.The metallic reflector of the reflective liquid-crystal display of existing diffusion modulation type also can be used as pixel electrode simultaneously and use, and then can drive liquid crystal molecule with the voltage difference of upper substrate electrode, controls the bright dark degree of this picture element.Because if adjacent picture element is when needing the function of independent displaying, the electrode of adjacent picture element must do independent zones every, metallic reflector 110 must be done the design of picture element formula, therefore, the metallic reflector 110 of this patterned structure has considerable edge, the degree that this can increase scattered reflection causes the reflectivity of dark attitude too high (being about 10%), and makes the contrast of reflective display screen descend.
Summary of the invention
For solving the problem of reflecting type liquid crystal display panel because of the reflected light scattered reflection due to the edge of metallic reflector, purpose of the present invention just provides a kind of reflecting type liquid crystal display panel structure, the degree of scattered reflection of specular layer that wherein is positioned at liquid crystal layer below is very low, and makes the contrast of reflecting type liquid crystal display panel significantly rise.
According to one embodiment of the invention, a kind of reflecting type liquid crystal display panel is proposed, it is characterized in that described reflecting type liquid crystal display panel comprises at least: first substrate; A plurality of thin film diodes are positioned on described first substrate; Insulation course covers on described first substrate, and described insulation course has opening to expose a source/drain electrode of each described a plurality of thin film diode; Specular layer covers on described first substrate and is the coating of being insulated of described insulation course; A plurality of pattern picture transparency conducting layers are positioned on the described insulation course, and each described a plurality of pattern picture transparency conducting layer is electrically insulated to each other and is electrically connected to described source/drain electrode that a described opening is exposed respectively; Second substrate; Transparent electrode layer is on the one side of described second substrate and be arranged between described first substrate and described second substrate; And liquid crystal layer, between described reflection electrode layer and described transparent electrode layer.
In preferred embodiment of the present invention, first substrate and described second substrate are glass substrate.Insulation course comprises first insulation course and second insulation course.The material that first insulation course and second insulation course are adopted is an identical materials, for example monox, silicon oxynitride or silicon nitride.First insulation course also can adopt different materials with second insulation course.In addition, first insulation course and second insulation course can be single layer structure or sandwich construction.
In preferred embodiment of the present invention, the material of specular layer is a metal.The material of drawing transparency conducting layer is indium oxide, tin oxide or tin indium oxide.The transparent electrode layer that is positioned on second substrate then is to be common electrode.
The disclosed reflecting type liquid crystal display panel according to the present invention, with the pattern picture formula metallic reflector in the reflecting type liquid crystal display panel before, the minute surface that makes holohedral form into is penetrated layer (Mirror like reflector), therefore, behind the edge that reduces pattern picture formula metallic reflector, make the specular layer of entire emission formula display panels reach the effect (being about 2%) of as minute surface, hanging down scattered reflection, the specular layer of whole formula is coated by insulation course, not and the source/drain electrode electrically connects, so do not have a pixel electrode function.Therefore except the existing insulation course in below, a layer insulating need be added in the top, and pixel electrode then changes and utilizes the transparency electrode of pattern picture to reach.Utilization the invention has the advantages that the degree of the scattered reflection that can reduce the specular layer that is positioned at the liquid crystal layer below, and makes the contrast of reflecting type liquid crystal display panel significantly rise.
Description of drawings
For above and other objects of the present invention, feature, advantage and embodiment can be become apparent, being described in detail as follows of appended accompanying drawing:
Fig. 1 illustrates the synoptic diagram of present reflective display screen;
Fig. 2 illustrates the diagrammatic cross-section of 102 marker locations of circle among Fig. 1;
Fig. 3 illustrates the cut-away section synoptic diagram of the reflective display screen shown in one embodiment of the invention.
Embodiment
Below will and describe clear explaination spirit of the present invention in detail with accompanying drawing, any those of ordinary skill in the art is after understanding preferred embodiment of the present invention, when can be by the disclosed technology of the present invention, change and modification, and do not break away from spirit of the present invention and scope.
Please refer to Fig. 3, it illustrates the cut-away section synoptic diagram of the reflective display screen shown in one embodiment of the invention.As shown in Figure 3, have thin film diode (not illustrating) on substrate 204, insulation course 206 is positioned on the substrate 204 in regular turn with metallic reflector 210, and insulation course 206 has a source/drain electrode 208 that opening exposes thin film diode with metallic reflector 210.Insulation course 209 covers metallic reflector 210, and insulation course 209 has an opening and exposes source/drain electrode 208.Pattern picture transparency electrode 212 defines pixel electrode 103 as shown in Figure 1.
Referring again to Fig. 3, reflective display screen has substrate 218, on the one side of substrate 218 and transparent electrode layer 216 is set, transparent electrode layer 216 is between substrate 204 and substrate 218, and liquid crystal layer 214 is then between pattern picture transparency electrode 212 and transparent electrode layer 216.
In the present embodiment, substrate 204 is a transparency carrier with substrate 218, for example is glass substrate.Insulation course 206 and insulation course 209 are respectively the individual layer silicon nitride layer, also can adopt monox or silicon oxynitride in other embodiments.Insulation course 206 and insulation course 209 also can adopt the multilayer material structure of different materials or silicon nitride/silicon oxynitride and so on.
In preferred embodiment of the present invention, the material of specular layer 210 is a metal, for example is aluminium.The material of pattern picture transparency electrode 212 and transparent electrode layer 216 is a tin indium oxide, in other embodiments, also can use indium oxide or tin oxide.216 of transparent electrode layers that are positioned on the substrate 218 are to be common electrode.Can change the arrangement of liquid crystal molecule in the liquid crystal layer 216 by the current potential of rewriting pattern picture transparency electrode 212, with in that drawn between transparency electrode 212 defined picture elements represent light by different pattern dark.
According to preferred embodiment of the present invention, the structure on the substrate 204 forms with following processing procedure.After forming thin film diode and lead (sweep trace and data line) on the glass substrate, form first insulation course with chemical vapor deposition process and be covered on the substrate, then form specular layer on first insulation course.With the micro image etching procedure etching specular layer and first insulation course form first opening with a source/drain electrode that exposes thin film diode after, forming second insulation course with chemical vapor deposition process again is covered on the substrate, form second opening to expose a source/drain electrode of thin film diode with micro image etching procedure etching second insulation course, the deposition indium tin oxide layer is on second insulation course and fill up second opening, and the pattern picture indium tin oxide layer is to form pixel electrode and to define picture element.
By above-mentioned processing procedure, specular layer is that insulating material coats and is not the part of pixel electrode, so specular layer can comprehensively be formed on the substrate, make the specular layer of entire emission formula display panels reach the effect (being about 2%) of as minute surface, hanging down scattered reflection, the specular layer of whole formula is coated by insulation course, not and the source/drain electrode electrically connects, so do not have a pixel electrode function.Therefore except the existing insulation course in below, a layer insulating need be added in the top, and pixel electrode then changes and utilizes the transparency electrode of pattern picture to reach.Utilization the invention has the advantages that the degree of the scattered reflection that can reduce the specular layer that is positioned at the liquid crystal layer below, and makes the contrast of reflecting type liquid crystal display panel significantly rise.
Though the present invention discloses as above with embodiment; right its is not in order to limit the present invention; any those of ordinary skill in the art; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (8)
1. a reflecting type liquid crystal display panel is characterized in that, described reflecting type liquid crystal display panel comprises at least:
First substrate;
A plurality of thin film diodes are positioned on described first substrate;
Insulation course covers on described first substrate, and described insulation course has opening to expose a source/drain electrode of each described a plurality of thin film diode;
Specular layer covers on described first substrate and is the coating of being insulated of described insulation course;
A plurality of pattern picture transparency conducting layers are positioned on the described insulation course, and each described a plurality of pattern picture transparency conducting layer is electrically insulated to each other and is electrically connected to described source/drain electrode that a described opening is exposed respectively;
Second substrate;
Transparent electrode layer is on the one side of described second substrate and be arranged between described first substrate and described second substrate; And
Liquid crystal layer is between described reflection electrode layer and described transparent electrode layer.
2. reflecting type liquid crystal display panel according to claim 1 is characterized in that, described insulation course comprises first insulation course and second insulation course.
3. reflecting type liquid crystal display panel according to claim 2 is characterized in that, described insulation course comprises that first insulation course and second insulation course adopt identical materials.
4. reflecting type liquid crystal display panel according to claim 1 is characterized in that, the material of described insulation course is monox, silicon oxynitride or silicon nitride.
5. reflecting type liquid crystal display panel according to claim 1 is characterized in that, the material of described specular layer is a metal.
6. reflecting type liquid crystal display panel according to claim 1 is characterized in that, the material of described a plurality of pattern picture transparency conducting layers is indium oxide, tin oxide or tin indium oxide.
7. reflecting type liquid crystal display panel according to claim 1 is characterized in that, described transparent electrode layer is a common electrode.
8. reflecting type liquid crystal display panel according to claim 1 is characterized in that, described first substrate and described second substrate are glass substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105302531A CN101986189A (en) | 2010-10-21 | 2010-10-21 | Reflective liquid crystal display panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105302531A CN101986189A (en) | 2010-10-21 | 2010-10-21 | Reflective liquid crystal display panel |
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| CN101986189A true CN101986189A (en) | 2011-03-16 |
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| CN2010105302531A Pending CN101986189A (en) | 2010-10-21 | 2010-10-21 | Reflective liquid crystal display panel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105118392A (en) * | 2015-07-16 | 2015-12-02 | 蔡思强 | Energy-saving display screen capable of utilizing ambient light through specular light reflection principle |
| CN106019683A (en) * | 2015-03-26 | 2016-10-12 | 三星显示有限公司 | Display device including reflecting layer |
| CN113594146A (en) * | 2021-08-26 | 2021-11-02 | 华玻视讯(珠海)科技有限公司 | Method for manufacturing direct type backlight lamp panel of liquid crystal display module |
-
2010
- 2010-10-21 CN CN2010105302531A patent/CN101986189A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019683A (en) * | 2015-03-26 | 2016-10-12 | 三星显示有限公司 | Display device including reflecting layer |
| CN105118392A (en) * | 2015-07-16 | 2015-12-02 | 蔡思强 | Energy-saving display screen capable of utilizing ambient light through specular light reflection principle |
| CN105118392B (en) * | 2015-07-16 | 2019-01-22 | 蔡思强 | A kind of energy saving display screen utilizing ambient light by specular light line reflection principle |
| CN113594146A (en) * | 2021-08-26 | 2021-11-02 | 华玻视讯(珠海)科技有限公司 | Method for manufacturing direct type backlight lamp panel of liquid crystal display module |
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Application publication date: 20110316 |