CN202453609U - Passive matrix liquid crystal display (LCD) - Google Patents
Passive matrix liquid crystal display (LCD) Download PDFInfo
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- CN202453609U CN202453609U CN2012200407847U CN201220040784U CN202453609U CN 202453609 U CN202453609 U CN 202453609U CN 2012200407847 U CN2012200407847 U CN 2012200407847U CN 201220040784 U CN201220040784 U CN 201220040784U CN 202453609 U CN202453609 U CN 202453609U
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- glass substrate
- pixel electrode
- lcd
- liquid crystal
- passive matrix
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Abstract
The embodiment of the utility model discloses a passive matrix liquid crystal display (LCD). The passive matrix LCD comprises a first glass substrate and a second glass substrate which are arranged opposite to each other, as well as a liquid crystal layer positioned between the first glass substrate and the second glass substrate, wherein one surface, facing to the liquid crystal layer, of the first glass substrate is provided with first pixel electrodes which are arranged at intervals, and one surface, facing to the liquid crystal layer, of the second glass substrate is provided with second pixel electrodes which are arranged at intervals. The passive matrix LCD also comprises light-proof insulating medium layers which are arranged in all interval areas of the first pixel electrodes, and/or light-proof insulating medium layers which are arranged in all interval areas of the second pixel electrodes. The passive matrix LCD provided by the utility model can block light emitted into all the interval areas of all the pixel electrodes, thus reducing the light transmittance of all the interval areas of all the pixel electrodes, then improving the contrast of the LCD, and increasing the visual angle range of the LCD.
Description
Technical field
The utility model relates to technical field of liquid crystal display, relates in particular to a kind of passive matrix type LCD.
Background technology
Lcd technology has been widely applied to the every field of people's live and work as the display technique of a new generation.And the liquid crystal mesogens display can be divided into passive matrix type LCD and active-matrix formula LCD according to the difference of control mode.The passive matrix type LCD display receives the influence of its display mode, device configuration in the prior art, and contrast and angular field of view all can not reach perfect condition.
With reference to figure 1, Fig. 1 is the diagrammatic cross-section of passive matrix type LCD display structure in the prior art.As can be seen from Figure 1, this display comprises first glass substrate and second glass substrate that is oppositely arranged, and is respectively arranged with spaced pixel electrode on first glass substrate and second glass substrate.Wherein, be shown as example, when the spacer region between each pixel electrode is in the ON state at the passive matrix type LCD display with negative-appearing image; Can there be light leakage phenomena to a certain degree; Especially when observing with great visual angle, light leakage phenomena is even more serious, thereby causes the angular field of view of LCD display to descend; And when the passive matrix type LCD display switched to the OFF state, still can there be bigger transmittance in the spacer region between each pixel electrode, produced light leakage phenomena, thereby the display screen when causing the OFF state is black inadequately, had reduced the contrast of this LCD display.
The utility model content
For solving the problems of the technologies described above, the utility model embodiment provides a kind of passive matrix type LCD, and this display has higher contrast ratio and bigger angular field of view.
For addressing the above problem, the utility model embodiment provides following technical scheme:
A kind of passive matrix type LCD; Comprise: first glass substrate that is oppositely arranged, second glass substrate and the liquid crystal layer between said first glass substrate and second glass substrate; Said first glass substrate simultaneously is provided with spaced first pixel electrode towards liquid crystal layer; Said second glass substrate simultaneously is provided with spaced second pixel electrode towards liquid crystal layer, also comprises: the lighttight insulating medium layer that is arranged on each spacer region of said first pixel electrode; And/or be arranged on the lighttight insulating medium layer of each spacer region of said second pixel electrode.
Preferably, the width of said insulating medium layer is slightly larger than or equals the spacing of each spacer region of said pixel electrode.
Preferably, said pixel electrode is the ITO electrode.
Preferably, said insulating medium layer is a black-matrix layer, and its material is the organic material with high optical density.
Preferably, the thickness of said insulating medium layer is in the scope of
.
Preferably, said display also comprises: be arranged at said first glass substrate and deviate from first polaroid on the liquid crystal layer one side and be arranged at said second glass substrate and deviate from second polaroid on the liquid crystal layer one side; And be connected with said second polaroid and deviate from the backlight of said second glass substrate.
Compared with prior art, technique scheme has the following advantages:
In the passive matrix type LCD that the utility model provided, comprise the lighttight insulating medium layer of each spacer region that is arranged on said first pixel electrode; And/or be arranged on the lighttight insulating medium layer of each spacer region of said second pixel electrode; This insulating medium layer can shelter from the light in each spacer region that is mapped to said each pixel electrode; Thereby reduced the transmittance at each spacer region place of said each pixel electrode; Weakened the light leakage phenomena in each spacer region of each pixel electrode described in the passive matrix type LCD; And then improved the contrast of said LCD, increased the angular field of view of said LCD simultaneously.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the diagrammatic cross-section of passive matrix type LCD display structure in the prior art;
Fig. 2 is the floor map of viewing area in the passive matrix type LCD display in the prior art;
Fig. 3 is the diagrammatic cross-section of the passive matrix type LCD display structure that provided among the utility model embodiment;
Fig. 4 is the diagrammatic cross-section of the another kind of structure of the passive matrix type LCD display that provided among the utility model embodiment;
Fig. 5 is the structural representation of viewing area in the passive matrix type LCD display that is provided among the utility model embodiment;
Fig. 6 is the floor map of viewing area in the passive matrix type LCD display that is provided among the utility model embodiment.
Illustrated among Fig. 1～Fig. 6: the spacer region 4 of first glass substrate 1, first polaroid 2, first pixel electrode 3, pixel electrode, liquid crystal layer 5, second glass substrate 6, second polaroid 7, second pixel electrode 8, backlight 9, pixel region 10, insulating medium layer 11.
Embodiment
To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
A lot of details have been set forth in the following description so that make much of the utility model; But the utility model can also adopt other to be different from alternate manner described here and implement; Those skilled in the art can do similar popularization under the situation of the utility model intension, so the utility model does not receive the restriction of following disclosed specific embodiment.
Secondly, the utility model combines synoptic diagram to be described in detail, when the utility model embodiment is detailed; For ease of explanation; The sectional view of expression device architecture can be disobeyed general ratio and done local the amplification, and said synoptic diagram is example, and it should not limit the scope of the utility model protection at this.The three dimensions size that in actual fabrication, should comprise in addition, length, width and the degree of depth.
Said as the background technology part; In the prior art in the passive matrix type LCD LCD; There is certain light leakage phenomena in each spacer region of said each pixel electrode, thereby has dwindled the angular field of view of said LCD display, has reduced the contrast of said LCD display simultaneously.
In view of this; The utility model provides a kind of passive matrix type LCD; Not only comprise: first glass substrate that is oppositely arranged, second glass substrate and the liquid crystal layer between said first glass substrate and second glass substrate; Said first glass substrate simultaneously is provided with spaced first pixel electrode towards liquid crystal layer; Said second glass substrate simultaneously is provided with spaced second pixel electrode towards liquid crystal layer, but also comprises: the lighttight insulating medium layer that is arranged on each spacer region of said first pixel electrode; And/or be arranged on the lighttight insulating medium layer of each spacer region of said second pixel electrode, thus improved the contrast of said LCD, increased the angular field of view of said LCD simultaneously.
Below in conjunction with accompanying drawing the passive matrix type display that is provided among the utility model embodiment is described in detail.
The LCD LCD is divided into erect image and shows with negative-appearing image and show two kinds, the LCD LCD that shows for erect image, and when on the pixel electrode not during making alive, the LCD LCD is in the OFF state, and luminous energy becomes white attitude through the LCD LCD; When adding voltage on the pixel electrode, the LCD LCD is in the ON state, and light can not see through the LCD LCD and become black attitude.The LCD LCD that shows for negative-appearing image, when on the pixel electrode not during making alive, the LCD LCD is in the OFF state, and light can not see through the LCD LCD and become black attitude; When adding voltage on the pixel electrode, the LCD LCD is in the ON state, and luminous energy sees through the LCD LCD and becomes white attitude.Through selectively on pixel electrode, applying voltage, just can on display screen, demonstrate pictures different.Being shown as example with negative-appearing image among the utility model embodiment describes.
With reference to figure 3, Fig. 3 is the diagrammatic cross-section of the passive matrix type LCD display structure that provided among the utility model embodiment.As can beappreciated from fig. 3; The passive matrix type display that is provided among the utility model embodiment comprises: first glass substrate 1, second glass substrate 6 and the liquid crystal layer 5 between said first glass substrate 1 and second glass substrate 6 that are oppositely arranged; Said first glass substrate 1 is provided with spaced first pixel electrode 3 towards liquid crystal layer 5 one sides; Said second glass substrate 6 is provided with spaced second pixel electrode 8 towards liquid crystal layer 5 one sides, and is provided with lighttight insulating medium layer 11 in each spacer region 4 of said second pixel electrode 8.Wherein, said insulating medium layer 11 covers on second pixel electrode 8 that is positioned at said second glass substrate 6 surfaces with netted mode.
Need to prove; Said insulating medium layer 11 among the utility model embodiment can also be produced on said first glass substrate 1; As shown in Figure 4; Each spacer region 4 that is positioned at first pixel electrode 3 on said first glass substrate 1 surface is provided with lighttight insulating medium layer 11, also can in each spacer region 4 of said first pixel electrode 3 and second pixel electrode 8, lighttight insulating medium layer 11 be set simultaneously.
Can be among the utility model embodiment through technologies such as exposure, serigraphy or inkjet printings; Each spacer region 4 at each pixel electrode that is positioned at said glass baseplate surface forms lighttight insulating medium layer 11, and with common PMLCD, TN type product is an example; Said lighttight insulating medium layer 11 is a black-matrix layer; Be produced on first glass substrate, 1 surface, its concrete manufacturing process can for: at each spacer region 4 inward turning coating black matrix glue-lines of each pixel electrode of said first glass substrate 1 surface, and it is carried out the precuring of certain hour; Adopt the mask of figure that the black matrix" glue-line is made public afterwards with filter pattern and pixel electrode pattern; On said black matrix" glue-line surface, form filter pattern and pixel electrode pattern, obtain having the black matrix" glue-line of filter pattern and ITO electrode pattern figure after developing, then it is heating and curing; Form post bake, obtain lighttight insulating medium layer 11.The structural representation of the viewing area after completing is as shown in Figure 5; Pixel region 10 and insulating medium layer 11 have been shown among the figure; Wherein, The width of said lighttight insulating medium layer 11 is slightly larger than or equals the spacing of each spacer region 4 of said pixel electrode; Its material is the organic material with high optical density, and thickness is in the scope of
; And said pixel electrode is the ITO electrode.
Need to prove; The width of said lighttight insulating medium layer 11 is slightly larger than the spacing of each spacer region 4 of said pixel electrode; Be meant that said lighttight insulating medium layer 11 covers a little edge of said pixel electrode, thereby cover each spacer region 4 of said pixel electrode fully, the utility model does not limit this; So long as not covering said pixel electrode fully, and the electric conductivity that does not influence said each pixel electrode gets final product.
The passive matrix type LCD that the utility model embodiment is provided also comprises: be arranged at said first glass substrate 1 and deviate from first polaroid 2 on liquid crystal layer 5 one side and be arranged at said second glass substrate 6 and deviate from second polaroid 7 on liquid crystal layer 5 one sides; And be connected with said second polaroid 7 and deviate from the backlight 9 of said second glass substrate 6.
Wherein, be coated with one deck oriented layer in the whole viewing area of said first glass substrate 1 and second glass substrate, 6 inboards, the effect of this oriented layer is that the liquid crystal molecule in the liquid crystal layer 5 is arranged according to specific direction.And the polarizing axis of said first polaroid 2 and second polaroid 7 is parallel to each other, and is parallel to each other with the direction of the inboard oriented layer of glass substrate or vertical.
When backlight 9 was opened, the light rays that backlight 9 is sent got into the liquid crystal layer 5 that comprises a plurality of liquid crystal droplets through said second polaroid 7 and second glass substrate.Drop in the said liquid crystal layer 5 all is comprised in the tiny cell structure, and one or more cells constitute a pixel on the screen.Between said glass substrate and the said liquid crystal layer is pixel electrode, and the effect of this electrode mainly is that external voltage signal is added to liquid crystal layer 5 both sides, thereby through changing the optically-active state that voltage changes liquid crystal.When first pixel electrode 3 in the LCD display and 8 generations of second pixel electrode electric field; Liquid crystal molecule in the said liquid crystal layer 5 will be distorted; Thereby the light that will pass through wherein carries out well-regulated refraction, shows on screen through said first glass substrate 1 and first polaroid 2 successively at last.
The light that sends at said backlight 9 is during through said pixel electrode, has in each spacer region 4 that part light is mapped to said each pixel electrode, thereby causes certain light leakage phenomena.And in the LCD display that is provided among the utility model embodiment; Be provided with lighttight insulating medium layer 11 in each spacer region 4 of said each pixel electrode; And said lighttight insulating medium layer 11 covers on second pixel electrode 8 on second glass substrate, 6 surfaces with netted mode; Thereby can the light in each spacer region 4 that be mapped to said second pixel electrode 8 be sheltered from; Reduce the transmittance at each spacer region 4 places of said second pixel electrode; Weaken the light leakage phenomena at each spacer region 4 places of second pixel electrode described in the passive matrix type LCD, and then improved the contrast of said LCD display, increased the angular field of view of said LCD display simultaneously.
With a specific embodiment LCD that the utility model was provided is described below.
With elemental area is 180 μ m*180 μ m, and the display of the spacing 20 μ m of pixel electrode spacer region 4 is an example, and when adopting in the prior art passive matrix type LCD display, the floor map of its viewing area is as shown in Figure 2, supposes that its contrast is 200: 1.
If adopt the passive matrix type LCD display described in the utility model embodiment, the floor map of its viewing area is as shown in Figure 6.Can find out that in conjunction with Fig. 2 and Fig. 6 in the LCD display that the utility model embodiment is provided, each spacer region 4 surfaces of said each pixel electrode are provided with lighttight insulating medium layer 11.Suppose in the whole pixel display area territory that (promptly in the display area of 200 μ m*200 μ m) brightness is even, owing to do not have pixel electrode in each spacer region 4 of said each pixel electrode, can't driving liquid crystal; Therefore; When no matter said LCD display was in OFF state or ON state, the brightness in each spacer region 4 of said each pixel electrode all remained unchanged the display brightness when being in the OFF state near said LCD display; It is former then when said LCD display is in the OFF state; Because the lighttight insulating medium layer 11 on each spacer region 4 surfaces of said each pixel electrode has sheltered from the part light in each spacer region 4 that is mapped to said each pixel electrode, thereby reduced the transmittance of each spacer region 4 of said each pixel electrode, made that original (180*180)/(200*200) reduced in the brightness in the whole pixel display area territory; Promptly 81%; And when said LCD display was in the ON state, the brightness in the whole pixel display area territory remained unchanged, thereby made the contrast of this LCD display this moment become 200: 0.81; Be about 249: 1, the contrast of said LCD display has been improved more than 20%.
And passive matrix type LCD display of the prior art; Because there is light leakage phenomena in each spacer region 4 of said each pixel electrode; The not black situation of background color when causing said LCD display to be in the OFF state easily; And the passive matrix type LCD display that is provided among the utility model embodiment because each spacer region 4 surfaces of said each pixel electrode are provided with lighttight insulating medium layer 11, has weakened the light leak degree of each spacer region 4 of said each pixel electrode greatly; Thereby increased the contrast value of angular field of view, enlarged the angular field of view of said LCD display.
In sum; The passive matrix type LCD that the utility model embodiment is provided; Because each spacer region surface of said each pixel electrode is provided with lighttight insulating medium layer, when backlight is opened, can the light in each spacer region that be mapped to said each pixel electrode be sheltered from; Reduced the transmittance of each spacer region of said each pixel electrode; Thereby weakened the interior light leakage phenomena of each spacer region of each pixel electrode, and then improved the contrast of said LCD, increased the angular field of view of said LCD simultaneously.And the passive matrix type LCD that the utility model provided can be widely used in fields such as vehicle-mounted demonstration, consumer electronics demonstration and industry control instrument.
Various piece adopts the mode of going forward one by one to describe in this instructions, and what each part stressed all is and the difference of other parts that identical similar part is mutually referring to getting final product between the various piece.
Need to prove; In this article; Relational terms such as first and second grades only is used for an entity or operation are made a distinction with another entity or operation, and not necessarily requires or hint relation or the order that has any this reality between these entities or the operation.And; Term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability; Thereby make and comprise that process, method, article or the equipment of a series of key elements not only comprise those key elements; But also comprise other key elements of clearly not listing, or also be included as this process, method, article or equipment intrinsic key element.Under the situation that do not having much more more restrictions, the key element that limits by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises said key element and also have other identical element.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation of spirit that does not break away from the utility model or scope in other embodiments among this paper.Therefore, the utility model will can not be restricted to embodiment illustrated herein, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (6)
1. passive matrix type LCD; Comprise: first glass substrate that is oppositely arranged, second glass substrate and the liquid crystal layer between said first glass substrate and second glass substrate; Said first glass substrate simultaneously is provided with spaced first pixel electrode towards liquid crystal layer; Said second glass substrate simultaneously is provided with spaced second pixel electrode towards liquid crystal layer, it is characterized in that, also comprises:
Be arranged on the lighttight insulating medium layer of each spacer region of said first pixel electrode;
And/or
Be arranged on the lighttight insulating medium layer of each spacer region of said second pixel electrode.
2. passive matrix type LCD according to claim 1 is characterized in that the width of said insulating medium layer is slightly larger than or equals the spacing of each spacer region of said pixel electrode.
3. passive matrix type LCD according to claim 1 is characterized in that, said pixel electrode is the ITO electrode.
4. passive matrix type LCD according to claim 1 is characterized in that, said insulating medium layer is a black-matrix layer, and its material is the organic material with high optical density.
5. passive matrix type LCD according to claim 1; It is characterized in that the thickness of said insulating medium layer is in the scope of
.
6. passive matrix type LCD according to claim 1 is characterized in that, said display also comprises:
Being arranged at said first glass substrate deviates from first polaroid on the liquid crystal layer one side and is arranged at said second glass substrate and deviate from second polaroid on the liquid crystal layer one side;
And be connected with said second polaroid and deviate from the backlight of said second glass substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200407847U CN202453609U (en) | 2012-02-08 | 2012-02-08 | Passive matrix liquid crystal display (LCD) |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200407847U CN202453609U (en) | 2012-02-08 | 2012-02-08 | Passive matrix liquid crystal display (LCD) |
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| CN202453609U true CN202453609U (en) | 2012-09-26 |
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| CN2012200407847U Expired - Lifetime CN202453609U (en) | 2012-02-08 | 2012-02-08 | Passive matrix liquid crystal display (LCD) |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540591A (en) * | 2012-02-08 | 2012-07-04 | 信利半导体有限公司 | Passive matrix type liquid crystal display |
| CN103744243A (en) * | 2013-12-31 | 2014-04-23 | 南京中电熊猫液晶显示科技有限公司 | LCD (Liquid Crystal Display) panel and manufacturing method thereof |
| CN105929597A (en) * | 2016-05-20 | 2016-09-07 | 京东方科技集团股份有限公司 | Backlight source, manufacturing method thereof, display substrate, display device and display method of display device |
-
2012
- 2012-02-08 CN CN2012200407847U patent/CN202453609U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540591A (en) * | 2012-02-08 | 2012-07-04 | 信利半导体有限公司 | Passive matrix type liquid crystal display |
| CN103744243A (en) * | 2013-12-31 | 2014-04-23 | 南京中电熊猫液晶显示科技有限公司 | LCD (Liquid Crystal Display) panel and manufacturing method thereof |
| CN103744243B (en) * | 2013-12-31 | 2016-09-28 | 南京中电熊猫液晶显示科技有限公司 | A kind of display panels and manufacture method thereof |
| CN105929597A (en) * | 2016-05-20 | 2016-09-07 | 京东方科技集团股份有限公司 | Backlight source, manufacturing method thereof, display substrate, display device and display method of display device |
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Granted publication date: 20120926 |