CN104111557B - Color membrane substrate, backlight source and display device - Google Patents
Color membrane substrate, backlight source and display device Download PDFInfo
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- CN104111557B CN104111557B CN201410291225.7A CN201410291225A CN104111557B CN 104111557 B CN104111557 B CN 104111557B CN 201410291225 A CN201410291225 A CN 201410291225A CN 104111557 B CN104111557 B CN 104111557B
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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 technology field, the back of the body that more particularly, to a kind of color membrane substrates are used cooperatively with this color membrane substrates
Light source and the display device including this color membrane substrates and this backlight.
Background technology
Traditional liquid crystal display device comprises：Display floater, backlight and control system etc..Fig. 1 is existing display device
Structural representation, display floater includes array base palte 3, color membrane substrates 5 and is located at liquid crystal 4 between the two, wherein, color film base
Plate 5 includes multiple pixel cells, and each pixel cell includes red, green, blue three sub-pixels of matrix arrangement, such as Fig. 2
Shown in.Described display floater also includes being attached to the polaroid 2 outside display floater.Backlight 1 is white light source, common
Type is blue light source and phosphor combination, blue light excitated fluorescent powder, and the light being inspired forms white light with blue light.Fluorescence
Powder can be yellow fluorescent powder, yellow red fluorescent material or red green fluorescence powder.
During liquid crystal indicator work, control system one side is powered to backlight makes it send white light, on the other hand controls
Display floater processed is so as to control red, green, blue three sub-pixels printing opacity situations according to the signal of input, thus realizing
Colored display.
In traditional liquid crystal display device, white light is formed by blue light source excitated fluorescent powder, then by red, green, blue
Resin is filtered to above-mentioned white light respectively and is formed redness, green, blue transmission light, and through red, green, blue resins
Light transmittance general be respectively 20%, 60% and 10%, so average transmittance only 30% about, light transmittance is low.
Content of the invention
It is an object of the invention to provide a kind of color membrane substrates, backlight and display device, to improve liquid crystal indicator
Light transmittance.
For solving above-mentioned technical problem, as the first aspect of the invention, provide a kind of color membrane substrates, including multiple pictures
Plain unit, each described pixel cell includes the first sub-pixel and the second sub-pixel, and described first sub-pixel is color sub-pixel,
Described second sub-pixel is clear subpixel, and the region that described color membrane substrates are located at described first sub-pixel includes being sequentially formed at
On underlay substrate with described first sub-pixel colors identical resin bed and with described first sub-pixel colors identical fluorescence
Bisque, the light that described phosphor powder layer can be fired to described phosphor powder layer inspires color and described first sub-pixel colors phase
Same light.
Preferably, described first sub-pixel is red sub-pixel, and described resin bed is red resin layer, described phosphor powder layer
For Red phosphor layer.
Preferably, described first sub-pixel is green sub-pixels, and described resin bed is green resin layer, described phosphor powder layer
For green phosphor layer.
Preferably, the thickness of described phosphor powder layer is between 0.001mm-1mm.
As the second aspect of the invention, also provide a kind of backlight, with above-mentioned color membrane substrates provided by the present invention
Use cooperatively, described backlight includes the first light source and secondary light source, described first light source and described secondary light source are alternately luminous,
Light that described first light source sends and the light that described secondary light source sends have different colors, and all with described first sub-pixel
Color is different, and the light that described first light source sends inspires color and described first sub-pixel colors phase after described phosphor powder layer
With light, the light that the light being sent by described first light source, described secondary light source send and appear the light of described first sub-pixel by
According to the light that can obtain any one color after predetermined ratio mixing.
As the third aspect of the invention, also provide a kind of display device, including display floater and backlight, described aobvious
Show that panel includes above-mentioned color membrane substrates provided by the present invention, described backlight is above-mentioned backlight provided by the present invention.
Preferably, described first sub-pixel is red sub-pixel, and described resin bed is red resin layer, described phosphor powder layer
For Red phosphor layer, described first light source is blue light source, and described secondary light source is green-light source.
Preferably, described first sub-pixel is green sub-pixels, and described resin bed is green resin layer, described phosphor powder layer
For green phosphor layer, described first light source is blue light source, and described secondary light source is red-light source.
Preferably, the two field picture that described display floater shows includes the first sub-frame images and the second sub-frame images, aobvious
When showing described first sub-frame images, described first light source luminescent, when showing described second sub-frame images, described secondary light source is sent out
Light.
Preferably, the rate of scanning of described display floater is the integral multiple of 120Hz or 120Hz.
In the display device that the present invention provides, each pixel cell only includes two sub-pixels, in pixel cell size phase
In the case of same, it is divided into three sub-pixels with respect to a traditional pixel cell, in the present invention, pixel aperture ratio is higher.And
And one of sub-pixel is clear subpixel in the present invention, average transmittance is improved.On the other hand, in color membrane substrates
Manufacturing process in it is only necessary to form a kind of resin bed of color and phosphor powder layer two procedures, with respect to traditional color film base
Plate decreases one procedure, advantageously reduces cost.
Brief description
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, with following tool
Body embodiment is used for explaining the present invention together, but is not construed as limiting the invention.
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 the display device that the present invention provides；
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：In prior art
Color membrane substrates；21：Backlight in the present invention；11：First light source；12：Secondary light source；25：Color membrane substrates in the present invention；
501：First sub-pixel；502：Second sub-pixel；51：Resin bed；52：Phosphor powder layer；53：Underlay substrate.
Specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explains the present invention, is not limited to the present invention.
Present invention firstly provides a kind of color membrane substrates, including multiple pixel cells, as shown in Figure 3, described color membrane substrates
Each pixel cell in 25 includes the first sub-pixel 501 and the second sub-pixel 502, and the first sub-pixel 501 is color sub-pixel,
Second sub-pixel 502 is clear subpixel, and the region that color membrane substrates 25 are located at the first sub-pixel 501 includes being sequentially formed at substrate
On substrate 53 with the first sub-pixel 501 color identical resin bed 51 and with the first sub-pixel 501 color identical fluorescent material
Layer 52, described phosphor powder layer 52 can be fired to its light and inspire color and the first sub-pixel 501 color identical light.
Generally, color sub-pixel has three kinds of a red, green, blue, red, green, blue resins light transmittances are respectively 20%,
60% and 10%, in the prior art, the average transmittance only 30% about of pixel region, and due to the second sub-pixel in the present invention
502 is clear subpixel, eliminates the resin bed with filtration, the light that backlight sends is not filtered, therefore
It is 100% so that pixel region has higher light transmittance in the present invention positioned at the light transmittance of the second subpixel area.
Additionally, compared with prior art, in the case of pixel cell size identical, a pixel cell in the present invention
It is divided into two sub-pixels, be divided into three sub-pixels, pixel aperture ratio in the present invention with respect to a traditional pixel cell
Higher.This is that general aperture opening ratio is also higher, enters one because, in the case of pixel cell size identical, sub-pixel size is bigger
Step improves the light transmittance of display floater.
If in the present invention, the size of each sub-pixel and prior art sub-pixel is equivalently-sized, then each pixel
The sub-pixel that unit comprises becomes two from three, in the PPI (per inch pixel count, the Pixels Per that improve display device
Inch) aspect is also advantageous.
On the other hand, the color membrane substrates that the present invention provides only need to be formed in manufacturing process a kind of resin bed of color and
Phosphor powder layer two procedures, decrease one procedure with respect to traditional color membrane substrates, advantageously reduce cost.
The present invention provide the first color membrane substrates as shown in Figure 4, the first sub-pixel 501 that color membrane substrates 25 include
For red sub-pixel, resin bed 51 is red resin layer, and phosphor powder layer 52 is Red phosphor layer.Color membrane substrates 25 are located at first
The region of sub-pixel 501 includes the red resin layer being sequentially formed on underlay substrate 53 and Red phosphor layer.Color membrane substrates
25 regions being located at the second sub-pixel 502 (i.e. clear subpixel) can form Optical transparent adhesive to replace on underlay substrate 53
Traditional resin bed.Fig. 5 is the pixel schematic diagram in the present embodiment, and each pixel cell includes two sub-pixels, is red respectively
Sub-pixels and clear subpixel.In the present embodiment, light through the average transmittance of pixel region be about 55%.
The present invention provide second color membrane substrates as shown in Figure 6, the first sub-pixel 501 that color membrane substrates 25 include
For green sub-pixels, resin bed 51 is green resin layer, and phosphor powder layer 52 is green phosphor layer.Color membrane substrates 25 are located at first
The region of sub-pixel 501 includes the green resin layer being sequentially formed on underlay substrate 53 and green phosphor layer.Color membrane substrates
25 regions being located at the second sub-pixel 502 (i.e. clear subpixel) can form Optical transparent adhesive to replace on underlay substrate 53
Traditional resin bed.Fig. 7 is the pixel schematic diagram in the present embodiment, and each pixel cell includes two sub-pixels, is green respectively
Sub-pixels and clear subpixel.In the present embodiment, light through the average transmittance of pixel region be about 65%.
Described red fluorescence powder or described green emitting phosphor can be selected from RG powder in the industry, i.e. WLED (white luminous two poles
Pipe, White LED) in conventional R powder or G powder, the thickness of phosphor powder layer 52 is in the range of 0.001mm-1mm.
It is presently mainly the light obtaining other colors by blue light come excitated fluorescent powder, the light activated redness of conventional indigo plant
The material of fluorescent material has following several：
1) alkaline earth sulfide fluorescent material series：As Ca1-xSrxS:Eu2+(0≤x≤1), different with x, peak value can be excited
In 600-660nm HONGGUANG, half-peak breadth 70nm about；
2) Nitride phosphor series：As M2Si5N8:Eu2+, peak value can be excited in 605nm-615nm HONGGUANG, wherein, M selects
From Ca, Sr or Ba；
3) the fluorescent material series based on aluminate：As Sr3Al2O6:Eu2+Deng.
Used in the present invention material of red fluorescence powder can be in above-mentioned material any one or arbitrarily several
Mixing.
The material of the light activated green emitting phosphor of conventional indigo plant has following several：
1)SrCa2S4:Eu2+, peak value 535nm green glow can be excited；
2)SiAlON:Yb2+, peak value 549nm green glow can be excited；
3)Sr2SiO4:Eu2+Doping Ba2+And/or Mg2+Fluorescent material it should be appreciated that " Eu herein2+Doping Ba2+
And/or Mg2+" refer to Eu2+In doped with Ba2+And/or Mg2+.
Used in the present invention material of green emitting phosphor can be in above-mentioned material any one or arbitrarily several
Mixing.
Present invention also offers a kind of backlight, use cooperatively with above-mentioned color membrane substrates provided by the present invention.In Fig. 3
Shown, described backlight 21 includes the first light source 11 and secondary light source 12, and the first light source 11 and secondary light source 12 can be electric by driving
Road controls alternately luminous.
Light that first light source 11 sends and the light that secondary light source 12 sends have different colors, and all with the described first son
Pixel 501 color is different, and the light that the first light source 11 sends inspires color and the first sub-pixel 501 after described phosphor powder layer 52
Color identical light, the light that the light being sent by the first light source 11, secondary light source 12 send and appear the light of the first sub-pixel 501 by
According to the light that can obtain any one color after predetermined ratio mixing.
Here the first light source 11 and secondary light source 12 can be LED chip, cathode fluorescent tube or other satisfactions
The light source of above-mentioned luminescent condition.
Present invention also offers a kind of display device, including display floater and backlight, described display floater includes this
Bright provided above-mentioned color membrane substrates, described backlight is above-mentioned backlight provided by the present invention.
Fig. 4 be the present invention provide the first display device structural representation, wherein color membrane substrates 25 include first
Sub-pixel 501 is red sub-pixel, and described resin bed 51 is red resin layer, and described phosphor powder layer 52 is Red phosphor layer,
Described 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 floater shows includes the first sub-frame images and the second sub-frame images, display described the
The second son when the first sub-pixel 501 during one sub-frame images and the second sub-pixel 502 and described second sub-frame images of display
The grayscale signal of pixel 502 is the corresponding three color grayscale signal of picture, and described first subframe and described second subframe synthesize
One picture.
When showing described first sub-frame images, blue light source lights, and in the first sub-pixel 501 region, blue light source is sent out
The blue light going out inspires the light including HONGGUANG, then the filtration through red resin layer through Red phosphor layer, transmits red
Light.The blue light that blue light source sends transmits blue light by the second sub-pixel 502 (i.e. clear subpixel) region.
When showing described second sub-frame images, green-light source lights, and the green glow that now green-light source sends passes through second
Sub-pixel 502 (i.e. clear subpixel) region transmits green glow.And in the first sub-pixel 501 region, usual green glow will not excite
Red phosphor layer, and red resin layer can also filter out the light of non-redness.To be on the safe side it is also possible to pass through TFT
The GTG controlling the first sub-pixel 501 region is L0 state, so that the first sub-pixel 501 region does not have light to appear.
Show HONGGUANG during described first subframe, blue light and show that green glow during described second subframe is mixed to form white light,
By being controlled to the gray scale in the first sub-pixel 501 region and the second sub-pixel 502 region, you can to realize random color
Colored display.
The frequency of the frequency of the first sub-frame images and the second sub-frame images should be sufficiently high, and the delay due to human eye is made
Overlapping in the brain of people with, the residual image of the first sub-frame images and the second sub-frame images, therefore, observer cannot tell
First sub-frame images and the second sub-frame images, can only experience the first sub-frame images and second sub-frame images of overlap.Due to
In one sub-frame images, only red and blue two kinds of colors, only have a kind of green color, two frame subimages in the second sub-frame images
Overlap just can get the color of various required displays, therefore, human eye it can also be seen that shades of colour.
Specifically, the rate of scanning of described display floater is the integral multiple of 120Hz or 120Hz.With described display floater
Rate of scanning be 120Hz as a example, the frequency of described first sub-frame images is 120Hz, and the frequency of described second sub-frame images is
120Hz, so that the frequency of display one two field picture is 60Hz, human eye can see the image continuously displaying.
Fig. 6 be the present invention provide second display device structural representation, wherein color membrane substrates 25 include first
Sub-pixel 501 is green sub-pixels, and described resin bed 51 is green resin layer, and described phosphor powder layer 52 is green phosphor layer,
Described 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 floater shows includes the first sub-frame images and the second sub-frame images, described
First sub-frame images are identical with the grayscale signal of described second sub-frame images, and described first subframe and described second subframe synthesize one
Individual picture.
When showing described first sub-frame images, blue light source lights, and in the first sub-pixel 501 region, blue light source is sent out
The blue light going out inspires the light including green glow, then the filtration through green resin layer through green phosphor layer, transmits green
Light.The blue light that blue light source sends transmits blue light by the second sub-pixel 502 (i.e. clear subpixel) region.
When showing described second sub-frame images, red-light source lights, and the HONGGUANG that now red-light source sends passes through second
Sub-pixel 502 (i.e. clear subpixel) region transmits HONGGUANG.And in the first sub-pixel 501 region, usual HONGGUANG will not excite
Green phosphor layer, and green resin layer can also filter out the light of non-green.To be on the safe side it is also possible to pass through TFT
The GTG controlling the first sub-pixel 501 region is L0 state, so that the first sub-pixel 501 region does not have light to appear.
Show green glow during described first subframe, blue light and show that HONGGUANG during described second subframe is mixed to form white light,
By the gray-scale Control to the first sub-pixel 501 region and the second sub-pixel 502 region, you can to realize the colour of random color
Display.
Specifically, the rate of scanning of described display floater is the integral multiple of 120Hz or 120Hz.With described display floater
Rate of scanning be 120Hz as a example, the frequency of described first sub-frame images is 120Hz, and the frequency of described second sub-frame images is
120Hz, so that the frequency of display one two field picture is 60Hz, human eye can see the image continuously displaying.
The display device that the present invention provides is a sequence and the display device of sequential mixing, in identical pixel cell size
Under, each pixel cell is only divided into two sub-pixels, and pixel aperture ratio is higher, and one of sub-pixel is transparent sub- picture
Element, does not filter to light, and average transmittance is improved.As described above, the average transmittance of conventional display device pixel region
Rate is about 30%, and the average transmittance of display device pixel region of the present invention is about 60%.
If in the present invention, the size of each sub-pixel and prior art sub-pixel is equivalently-sized, then each pixel
The sub-pixel that unit comprises becomes two from three, in the PPI (per inch pixel count, the Pixels Per that improve display device
Inch) aspect is also advantageous.
On the other hand, it is only necessary to form a kind of resin bed of color and phosphor powder layer in the manufacturing process of color membrane substrates
Two procedures, decrease one procedure with respect to traditional color membrane substrates, advantageously reduce cost.
It is understood that the embodiment of above principle being intended to be merely illustrative of the present and the exemplary enforcement adopting
Mode, but the invention is not limited in this.For those skilled in the art, in the essence without departing from the present invention
In the case of god and essence, various modifications and improvement can be made, these modifications and improvement are also considered as protection scope of the present invention.
Claims (7)
1. a kind of backlight, is used cooperatively it is characterised in that described color membrane substrates with color membrane substrates, including multiple pixel cells,
Each described pixel cell includes the first sub-pixel and the second sub-pixel, and described first sub-pixel is color sub-pixel, and described the
Two sub-pixels are clear subpixel, and the region that described color membrane substrates are located at described first sub-pixel includes being sequentially formed at substrate base
On plate with described first sub-pixel colors identical resin bed and with described first sub-pixel colors identical phosphor powder layer, institute
State phosphor powder layer and can be fired to the light of described phosphor powder layer and inspire color and described first sub-pixel colors identical light；
Described backlight includes the first light source and secondary light source, and described first light source and described secondary light source are alternately luminous, and described first
Light that light source sends and the light that described secondary light source sends have different colors, and all with described first sub-pixel colors not
With the light that described first light source sends inspires color and described first sub-pixel colors identical after described phosphor powder layer
Light, the light that the light being sent by described first light source, described secondary light source send and appear the light of described first sub-pixel according to pre-
The light of any one color can be obtained after certainty ratio mixing.
2. a kind of display device, including display floater and backlight it is characterised in that described display floater includes color membrane substrates,
Described color membrane substrates, including multiple pixel cells, each described pixel cell includes the first sub-pixel and the second sub-pixel, described
First sub-pixel is color sub-pixel, and described second sub-pixel is clear subpixel, and described color membrane substrates are located at described first son
The region of pixel include being sequentially formed on underlay substrate with described first sub-pixel colors identical resin bed and with described
First sub-pixel colors identical phosphor powder layer, the light that described phosphor powder layer can be fired to described phosphor powder layer inspires face
Color and described first sub-pixel colors identical light；Described backlight adopts the backlight described in claim 1.
3. display device according to claim 2 is it is characterised in that described first sub-pixel is red sub-pixel, described
Resin bed is red resin layer, and described phosphor powder layer is Red phosphor layer, and described first light source is blue light source, described second
Light source is green-light source.
4. display device according to claim 2 is it is characterised in that described first sub-pixel is green sub-pixels, described
Resin bed is green resin layer, and described phosphor powder layer is green phosphor layer, and described first light source is blue light source, described second
Light source is red-light source.
5. the display device according to any one of claim 2-4 is it is characterised in that the frame that shows of described display floater
Image includes the first sub-frame images and the second sub-frame images, when showing described first sub-frame images, described first light source luminescent,
When showing described second sub-frame images, described secondary light source lights.
6. display device according to claim 5 it is characterised in that described display floater rate of scanning be 120Hz or
The integral multiple of person 120Hz.
7. the display device according to claim 5 is it is characterised in that the thickness of described phosphor powder layer is in 0.001mm-
Between 1mm.
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| KR102277030B1 (en) * | 2015-05-29 | 2021-07-14 | 삼성디스플레이 주식회사 | Display device and method for driving the same |
| CN105182600A (en) * | 2015-10-27 | 2015-12-23 | 京东方科技集团股份有限公司 | Color film substrate, display panel and display device and working method thereof |
| 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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| CN101226291A (en) * | 2007-01-15 | 2008-07-23 | 胜华科技股份有限公司 | Field sequence LCD and drive method thereof |
| CN102338900A (en) * | 2011-10-11 | 2012-02-01 | 鸿富锦精密工业（深圳）有限公司 | Color filter and reflective display device with same |
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| KR19990000306A (en) * | 1997-06-04 | 1999-01-15 | 손욱 | Liquid crystal display and its color control method |
| JP2003027057A (en) * | 2001-07-17 | 2003-01-29 | Hitachi Ltd | Light source and image display device using the same |
| TW201426114A (en) * | 2012-12-19 | 2014-07-01 | Radiant Opto Electronics Corp | Liquid crystal display |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101226291A (en) * | 2007-01-15 | 2008-07-23 | 胜华科技股份有限公司 | Field sequence LCD and drive method thereof |
| CN102338900A (en) * | 2011-10-11 | 2012-02-01 | 鸿富锦精密工业（深圳）有限公司 | Color filter and reflective display device with same |
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