CN104111557A - Color membrane substrate, backlight source and display device - Google Patents
Color membrane substrate, backlight source and display device Download PDFInfo
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- CN104111557A CN104111557A CN201410291225.7A CN201410291225A CN104111557A CN 104111557 A CN104111557 A CN 104111557A CN 201410291225 A CN201410291225 A CN 201410291225A CN 104111557 A CN104111557 A CN 104111557A
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Abstract
The invention discloses a color membrane substrate, a backlight source and a display device and relates to the technical field of display. The color membrane substrate comprises a plurality of pixel units. Each pixel unit comprises a first sub-pixel and a second sub-pixel, the first sub-pixels are color sub-pixels, the second sub-pixels are transparent sub-pixels, the areas, located on the first sub-pixels, of the color membrane substrate comprise resin layers and fluorescent powder layers, the resin layers and fluorescent powder layers are sequentially formed on a lining substrate body and are identical with the first sub-pixels in color, and the fluorescent powder layers can be stimulated by light rays emitted to the fluorescent powder layers to emit light with the color same as the color of the first sub-pixels. The backlight source comprises a first light source and a second light source, and the first light source and the second light source emit light alternately and are used in cooperation with the color membrane substrate. Compared with the prior art, the display device is higher in light transmittance, one working procedure is omitted for the color membrane substrate, and cost can be reduced.
Description
Technical field
The present invention relates to display technique field, relate in particular to a kind of color membrane substrates, the backlight being used in conjunction with this color membrane substrates and the display device that comprises this color membrane substrates and this backlight.
Background technology
Tradition liquid crystal indicator comprises: display panel, backlight and control system etc.Fig. 1 is the structural representation of existing display device, display panel comprises array base palte 3, color membrane substrates 5 and is positioned at liquid crystal 4 between the two, wherein, color membrane substrates 5 comprises multiple pixel cells, each pixel cell comprises redness, green, blue three sub-pixels that matrix is arranged, as shown in Figure 2.Described display panel also comprises the polaroid 2 that is attached to display panel outside.Backlight 1 is white light source, and common type is blue light source and phosphor combination, blue-light excited fluorescent powder, and the light being inspired and blue light form white light.Fluorescent powder can be yellow fluorescent powder, yellow red fluorescent powder or red green fluorescence powder.
When liquid crystal indicator work, to backlight, power supply makes it send white light to control system on the one hand, controls on the other hand display panel, makes it according to the printing opacity situation of the signal controlling redness of input, green, blue three sub-pixels, thereby realizes colored demonstration.
In traditional liquid crystal indicator, form white light by blue light source excitated fluorescent powder, respectively above-mentioned white light is filtered and forms redness, green, blue transmission light by red, green, blue resins again, and be generally respectively 20%, 60% and 10% through transmittance red, green, blue resins, so average transmittance is 30% left and right only, transmittance is low.
Summary of the invention
The object of the present invention is to provide a kind of color membrane substrates, backlight and display device, to improve the transmittance of liquid crystal indicator.
For solving the problems of the technologies described above, as first aspect of the present invention, a kind of color membrane substrates is provided, comprise multiple pixel cells, each described pixel cell comprises the first sub-pixel and the second sub-pixel, described the first sub-pixel is color sub-pixel, described the second sub-pixel is transparent sub-pixel, the region that described color membrane substrates is positioned at described the first sub-pixel comprises the resin bed identical with described the first sub-pixel colors that be formed on successively on underlay substrate and the phosphor powder layer identical with described the first sub-pixel colors, the light that described phosphor powder layer can be fired to described phosphor powder layer inspires the light that color is identical with described the first sub-pixel colors.
Preferably, described the first sub-pixel is red sub-pixel, and described resin bed is red resin layer, and described phosphor powder layer is red fluorescence bisque.
Preferably, described the first sub-pixel is green sub-pixels, and described resin bed is green resin layer, and described phosphor powder layer is green phosphor layer.
Preferably, the thickness of described phosphor powder layer is between 0.001mm-1mm.
As second aspect of the present invention, a kind of backlight is also provided, be used in conjunction with above-mentioned color membrane substrates provided by the present invention, described backlight comprises the first light source and secondary light source, described the first light source and described secondary light source are alternately luminous, the light that the light that described the first light source sends and described secondary light source send has different colors, and all different from described the first sub-pixel colors, the light that described the first light source sends inspires the light that color is identical with described the first sub-pixel colors after described phosphor powder layer, the light being sent by described the first light source, the light that described secondary light source sends can obtain the light of any one color after mixing according to predetermined ratio with the light that appears described the first sub-pixel.
As the 3rd aspect of the present invention, a kind of display device is also provided, comprise display panel and backlight, described display panel comprises above-mentioned color membrane substrates provided by the present invention, described backlight is above-mentioned backlight provided by the present invention.
Preferably, described the first sub-pixel is red sub-pixel, and described resin bed is red resin layer, and described phosphor powder layer is red fluorescence bisque, and described the first light source is blue light source, and described secondary light source is green-light source.
Preferably, described the first sub-pixel is green sub-pixels, and described resin bed is green resin layer, and described phosphor powder layer is green phosphor layer, and described the first light source is blue light source, and described secondary light source is red-light source.
Preferably, the two field picture that described display panel shows comprises the first sub-frame images and the second sub-frame images, in the time showing described the first sub-frame images, and described the first light source luminescent, in the time showing described the second sub-frame images, described secondary light source is luminous.
Preferably, the sweep frequency of described display panel is the integral multiple of 120Hz or 120Hz.
In display device provided by the invention, each pixel cell only includes two sub-pixels, in the situation that pixel cell is measure-alike, is divided into three sub-pixels with respect to a traditional pixel cell, and in the present invention, pixel aperture ratio is higher.And in the present invention, one of them sub-pixel is transparent sub-pixel, and average transmittance is improved.On the other hand, in the manufacturing process of color membrane substrates, only need to form a kind of resin bed and phosphor powder layer two procedures of color, reduce by a procedure with respect to traditional color membrane substrates, be conducive to reduce costs.
Brief description of the drawings
Accompanying drawing is to be used to provide a further understanding of the present invention, and forms a part for instructions, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.
Fig. 1 is the structural representation of existing display device;
Fig. 2 is the pixel schematic diagram in existing color membrane substrates;
Fig. 3 is the structural representation of display device provided by the invention;
Fig. 4 is the structural representation of the display device in the embodiment of the present invention one;
Fig. 5 is the pixel schematic diagram in the embodiment of the present invention one;
Fig. 6 is the structural representation of the display device in the embodiment of the present invention two;
Fig. 7 is the pixel schematic diagram in the embodiment of the present invention two;
In the accompanying drawings, 1: backlight of the prior art; 2: polaroid; 3: array base palte; 4: liquid crystal; 5: color membrane substrates of the prior art; 21: the backlight in the present invention; 11: the first light sources; 12: secondary light source; 25: the color membrane substrates in the present invention; 501: the first sub-pixels; 502: the second sub-pixels; 51: resin bed; 52: phosphor powder layer; 53: underlay substrate.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
First the present invention provides a kind of color membrane substrates, comprise multiple pixel cells, as shown in Figure 3, each pixel cell in described color membrane substrates 25 comprises the first sub-pixel 501 and the second sub-pixel 502, the first sub-pixel 501 is color sub-pixel, the second sub-pixel 502 is transparent sub-pixel, the region that color membrane substrates 25 is positioned at the first sub-pixel 501 comprises the resin bed 51 identical with the first sub-pixel 501 colors that be formed on successively on underlay substrate 53 and the phosphor powder layer 52 identical with the first sub-pixel 501 colors, the light that described phosphor powder layer 52 can be fired to it inspires the light that color is identical with the first sub-pixel 501 colors.
Conventionally, color sub-pixel has three kinds of red, green, blues, transmittance red, green, blue resins is respectively 20%, 60% and 10%, in the prior art, the average transmittance of pixel region is 30% left and right only, and in the present invention because the second sub-pixel 502 is transparent sub-pixel, cancel the resin bed with filter action, the light backlight not being sent filters, and the transmittance that is therefore positioned at the second subpixel area is 100%, makes pixel region in the present invention have higher transmittance.
In addition, compared with prior art, in the situation that pixel cell is measure-alike, in the present invention, a pixel cell is only divided into two sub-pixels, is divided into three sub-pixels with respect to a traditional pixel cell, and in the present invention, pixel aperture ratio is higher.This is that sub-pixel size is larger due in the situation that pixel cell is measure-alike, and general aperture opening ratio is also higher, has further improved the transmittance of display panel.
If sub-pixel measure-alike in the size of each sub-pixel and prior art in the present invention, the sub-pixel that so each pixel cell comprises has become two from three, also have superiority at PPI (per inch pixel count, the Pixels Per Inch) aspect that improves display device.
On the other hand, color membrane substrates provided by the invention only need to form a kind of resin bed and phosphor powder layer two procedures of color in manufacturing process, has reduced by a procedure with respect to traditional color membrane substrates, is conducive to reduce costs.
As shown in Figure 4, the first sub-pixel 501 that color membrane substrates 25 comprises is red sub-pixel to the first color membrane substrates provided by the invention, and resin bed 51 is red resin layer, and phosphor powder layer 52 is red fluorescence bisque.The region that color membrane substrates 25 is positioned at the first sub-pixel 501 comprises the red resin layer and the red fluorescence bisque that are formed on successively on underlay substrate 53.The region that color membrane substrates 25 is positioned at the second sub-pixel 502 (being transparent sub-pixel) can form optical lens gelatin and replace traditional resin bed on underlay substrate 53.Fig. 5 is the pixel schematic diagram in the present embodiment, and each pixel cell comprises two sub-pixels, is respectively red sub-pixel and transparent sub-pixel.In the present embodiment, light is approximately 55% through the average transmittance of pixel region.
As shown in Figure 6, the first sub-pixel 501 that color membrane substrates 25 comprises is green sub-pixels to the second color membrane substrates provided by the invention, and resin bed 51 is green resin layer, and phosphor powder layer 52 is green phosphor layer.The region that color membrane substrates 25 is positioned at the first sub-pixel 501 comprises the green resin layer and the green phosphor layer that are formed on successively on underlay substrate 53.The region that color membrane substrates 25 is positioned at the second sub-pixel 502 (being transparent sub-pixel) can form optical lens gelatin and replace traditional resin bed on underlay substrate 53.Fig. 7 is the pixel schematic diagram in the present embodiment, and each pixel cell comprises two sub-pixels, is respectively green sub-pixels and transparent sub-pixel.In the present embodiment, light is approximately 65% through the average transmittance of pixel region.
Described red fluorescence powder or described green emitting phosphor can be selected from RG powder in the industry, i.e. conventional R powder or G powder in WLED (white light-emitting diode, White LED), and the thickness of phosphor powder layer 52 is in the scope of 0.001mm-1mm.
Be mainly to carry out excitated fluorescent powder to obtain the light of other colors by blue light at present, the material of conventional blue-light excited red fluorescence powder has following several:
1) alkaline earth sulfide fluorescent powder series: as Ca
1-xsr
xs:Eu
2+(0≤x≤1), with x difference, can excite peak value at 600-660nm ruddiness, half-peak breadth 70nm left and right;
2) Nitride phosphor series: as M
2si
5n
8: Eu
2+, can excite peak value at 605nm-615nm ruddiness, wherein, M is selected from Ca, Sr or Ba;
3) the fluorescent powder series based on aluminate: as Sr
3al
2o
6: Eu
2+deng.
The material of the red fluorescence powder using in the present invention can be any one or arbitrarily several mixing in above-mentioned material.
The material of conventional blue-light excited green emitting phosphor has following several:
1) SrCa
2s
4: Eu
2+, can excite peak value 535nm green glow;
2) SiAlON:Yb
2+, can excite peak value 549nm green glow;
3) Sr
2siO
4: Eu
2+doping Ba
2+and/or Mg
2+fluorescent powder, should be understood that " Eu herein
2+doping Ba
2+and/or Mg
2+" refer to Eu
2+in doped with Ba
2+and/or Mg
2+.
The material of the green emitting phosphor using in the present invention can be any one or arbitrarily several mixing in above-mentioned material.
The present invention also provides a kind of backlight, is used in conjunction with above-mentioned color membrane substrates provided by the present invention.As shown in Figure 3, described backlight 21 comprises that the first light source 11 and secondary light source 12, the first light sources 11 and secondary light source 12 can be alternately luminous by driving circuit control.
The light that the light that the first light source 11 sends and secondary light source 12 send has different colors, and all different from described the first sub-pixel 501 colors, the light that the first light source 11 sends inspires the light that color is identical with the first sub-pixel 501 colors after described phosphor powder layer 52, and the light that the light being sent by the first light source 11, secondary light source 12 send and the light that appears the first sub-pixel 501 can obtain the light of any one color after mixing according to predetermined ratio.
First light source 11 here and secondary light source 12 can be the light sources that LED chip, cathode fluorescent tube or other meet above-mentioned luminescent condition.
The present invention also provides a kind of display device, comprises display panel and backlight, and described display panel comprises above-mentioned color membrane substrates provided by the present invention, and described backlight is above-mentioned backlight provided by the present invention.
Fig. 4 is the structural representation of the first display device provided by the invention, the first sub-pixel 501 that wherein color membrane substrates 25 comprises is red sub-pixel, described resin bed 51 is red resin layer, described phosphor powder layer 52 is red fluorescence bisque, described the first light source 11 is blue light source, and described secondary light source 12 is green-light source.
Each two field picture that described display panel shows comprises the first sub-frame images and the second sub-frame images, the GTG signal of the first sub-pixel 501 while showing described the first sub-frame images and the second sub-pixel 502 and the second sub-pixel 502 while showing described the second sub-frame images is three color GTG signals that picture is corresponding, and described the first subframe and described the second subframe are synthesized a picture.
In the time showing described the first sub-frame images, blue light source is luminous, and in the first sub-pixel 501 regions, the blue light that blue light source sends inspires through red fluorescence bisque the light that comprises ruddiness, then passes through the filtration of red resin layer, transmits ruddiness.The blue light that blue light source sends transmits blue light by the second sub-pixel 502 (being transparent sub-pixel) region.
In the time showing described the second sub-frame images, green-light source is luminous, and the green glow that now green-light source is sent transmits green glow by the second sub-pixel 502 (being transparent sub-pixel) region.And in the first sub-pixel 501 regions, conventionally green glow can excitated red fluorescent powder layer, and red resin layer also can filter out the light of non-redness.To be on the safe side, the GTG that also can control the first sub-pixel 501 regions by TFT is L0 state, so that the first sub-pixel 501 regions do not have light to appear.
Green glow when ruddiness while showing described the first subframe, blue light and described the second subframe of demonstration is mixed to form white light, and by the gray scale in the first sub-pixel 501 regions and the second sub-pixel 502 regions is controlled, the colour that can realize random color shows.
The frequency of the frequency of the first sub-frame images and the second sub-frame images should be enough high, due to the delayed-action of human eye, the residual image of the first sub-frame images and the second sub-frame images are overlapping in people's brain, therefore, observer cannot tell the first sub-frame images and the second sub-frame images, can only experience the first overlapping sub-frame images and the second sub-frame images.Owing to only having red and blue two kinds of colors in the first sub-frame images, in the second sub-frame images, only have green a kind of color, the overlapping color that just can obtain various required demonstrations of two frame subimages, therefore, human eye also can be seen shades of colour.
Concrete, the sweep frequency of described display panel is the integral multiple of 120Hz or 120Hz.Taking the sweep frequency of described display panel as 120Hz is as example, the frequency of described the first sub-frame images is 120Hz, the frequency of described the second sub-frame images is 120Hz, thereby can make to show that the frequency of a two field picture is 60Hz, and human eye can be seen the image of continuous demonstration.
Fig. 6 is the structural representation of the second display device provided by the invention, the first sub-pixel 501 that wherein color membrane substrates 25 comprises is green sub-pixels, described resin bed 51 is green resin layer, described phosphor powder layer 52 is green phosphor layer, described the first light source 11 is blue light source, and described secondary light source 12 is red-light source.
Equally, each two field picture that described display panel shows comprises the first sub-frame images and the second sub-frame images, and the GTG signal of described the first sub-frame images and described the second sub-frame images is identical, and described the first subframe and described the second subframe are synthesized a picture.
In the time showing described the first sub-frame images, blue light source is luminous, and in the first sub-pixel 501 regions, the blue light that blue light source sends inspires through green phosphor layer the light that comprises green glow, then passes through the filtration of green resin layer, transmits green glow.The blue light that blue light source sends transmits blue light by the second sub-pixel 502 (being transparent sub-pixel) region.
In the time showing described the second sub-frame images, red-light source is luminous, and the ruddiness that now red-light source sends transmits ruddiness by the second sub-pixel 502 (being transparent sub-pixel) region.And in the first sub-pixel 501 regions, ruddiness can not excite green phosphor layer conventionally, and green resin layer also can filter out the light of non-green.To be on the safe side, the GTG that also can control the first sub-pixel 501 regions by TFT is L0 state, so that the first sub-pixel 501 regions do not have light to appear.
Ruddiness when green glow while showing described the first subframe, blue light and described the second subframe of demonstration is mixed to form white light, and by the gray-scale Control to the first sub-pixel 501 regions and the second sub-pixel 502 regions, the colour that can realize random color shows.
Concrete, the sweep frequency of described display panel is the integral multiple of 120Hz or 120Hz.Taking the sweep frequency of described display panel as 120Hz is as example, the frequency of described the first sub-frame images is 120Hz, the frequency of described the second sub-frame images is 120Hz, thereby can make to show that the frequency of a two field picture is 60Hz, and human eye can be seen the image of continuous demonstration.
Display device provided by the invention is the display device that an order and sequential are mixed, under identical pixel cell size, each pixel cell is only divided into two sub-pixels, pixel aperture ratio is higher, and one of them sub-pixel is transparent sub-pixel, light is not filtered, average transmittance is improved.As described above, the average transmittance of common display device pixel region is approximately 30%, and the average transmittance of display device of the present invention pixel region is approximately 60%.
If sub-pixel measure-alike in the size of each sub-pixel and prior art in the present invention, the sub-pixel that so each pixel cell comprises has become two from three, also have superiority at PPI (per inch pixel count, the Pixels Per Inch) aspect that improves display device.
On the other hand, in the manufacturing process of color membrane substrates, only need to form a kind of resin bed and phosphor powder layer two procedures of color, reduce by a procedure with respect to traditional color membrane substrates, be conducive to reduce costs.
Be understandable that, above embodiment is only used to principle of the present invention is described and the illustrative embodiments that adopts, but the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (10)
1. a color membrane substrates, comprise multiple pixel cells, it is characterized in that, each described pixel cell comprises the first sub-pixel and the second sub-pixel, described the first sub-pixel is color sub-pixel, described the second sub-pixel is transparent sub-pixel, the region that described color membrane substrates is positioned at described the first sub-pixel comprises the resin bed identical with described the first sub-pixel colors that be formed on successively on underlay substrate and the phosphor powder layer identical with described the first sub-pixel colors, the light that described phosphor powder layer can be fired to described phosphor powder layer inspires the light that color is identical with described the first sub-pixel colors.
2. color membrane substrates according to claim 1, is characterized in that, described the first sub-pixel is red sub-pixel, and described resin bed is red resin layer, and described phosphor powder layer is red fluorescence bisque.
3. color membrane substrates according to claim 1, is characterized in that, described the first sub-pixel is green sub-pixels, and described resin bed is green resin layer, and described phosphor powder layer is green phosphor layer.
4. according to the color membrane substrates described in any one in claim 1-3, it is characterized in that, the thickness of described phosphor powder layer is between 0.001mm-1mm.
5. a backlight, be used in conjunction with the color membrane substrates described in claim 1, it is characterized in that, described backlight comprises the first light source and secondary light source, described the first light source and described secondary light source are alternately luminous, the light that the light that described the first light source sends and described secondary light source send has different colors, and all different from described the first sub-pixel colors, the light that described the first light source sends inspires the light that color is identical with described the first sub-pixel colors after described phosphor powder layer, the light being sent by described the first light source, the light that described secondary light source sends can obtain the light of any one color after mixing according to predetermined ratio with the light that appears described the first sub-pixel.
6. a display device, comprises display panel and backlight, it is characterized in that, described display panel comprises color membrane substrates claimed in claim 1, and described backlight comprises backlight claimed in claim 5.
7. display device according to claim 6, is characterized in that, described the first sub-pixel is red sub-pixel, described resin bed is red resin layer, described phosphor powder layer is red fluorescence bisque, and described the first light source is blue light source, and described secondary light source is green-light source.
8. display device according to claim 6, is characterized in that, described the first sub-pixel is green sub-pixels, described resin bed is green resin layer, described phosphor powder layer is green phosphor layer, and described the first light source is blue light source, and described secondary light source is red-light source.
9. according to the display device described in any one in claim 6-8, it is characterized in that, the two field picture that described display panel shows comprises the first sub-frame images and the second sub-frame images, in the time showing described the first sub-frame images, described the first light source luminescent, in the time showing described the second sub-frame images, described secondary light source is luminous.
10. display device according to claim 9, is characterized in that, the sweep frequency of described display panel is the integral multiple of 120Hz or 120Hz.
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| CN201410291225.7A CN104111557B (en) | 2014-06-25 | 2014-06-25 | Color membrane substrate, backlight source and display device |
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| CN201410291225.7A CN104111557B (en) | 2014-06-25 | 2014-06-25 | Color membrane substrate, backlight source and display device |
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| CN106200092A (en) * | 2015-05-29 | 2016-12-07 | 三星显示有限公司 | Display device and the method being used for driving display device |
| CN110456560A (en) * | 2019-07-29 | 2019-11-15 | 武汉华星光电技术有限公司 | A kind of display panel and its display device |
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|---|---|
| CN104111557B (en) | 2017-02-15 |
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