CN101510022A - Display panel, photovoltaic device and production process thereof - Google Patents
Display panel, photovoltaic device and production process thereof Download PDFInfo
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- CN101510022A CN101510022A CNA2009101283702A CN200910128370A CN101510022A CN 101510022 A CN101510022 A CN 101510022A CN A2009101283702 A CNA2009101283702 A CN A2009101283702A CN 200910128370 A CN200910128370 A CN 200910128370A CN 101510022 A CN101510022 A CN 101510022A
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Abstract
The invention provides a display panel, a photoelectric device and a manufacturing method thereof. The display panel comprises a pair of substrates, a color filter layer and a display medium. The substrate is provided with a plurality of pixels, and each pixel comprises at least one first sub-pixel, one second sub-pixel, one third sub-pixel and one fourth sub-pixel. The colored filter layer is arranged on one of the substrates and comprises at least one first color filter pattern positioned on the first sub-pixel, one second color filter pattern positioned on the second sub-pixel, one third color filter pattern positioned on the third sub-pixel, and one fourth color filter pattern positioned on the fourth sub-pixel. The display medium is arranged between the substrates, and the mediums on the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel respectively have a first thickness T1, a second thickness T2, a third thickness T3 and a fourth thickness T4, wherein T1 is larger than T2, T2 is larger than T3 and T1 is larger than T4, and T4 is larger than T3.
Description
Technical field
The invention relates to a kind of display panel, electrooptical device and manufacture method thereof, and particularly relevant for a kind of display panel, electrooptical device and manufacture method thereof of sub-pixel (sub-pixel) of the display medium (display medium) with different-thickness.
Background technology
Along with the maturation of photoelectricity and semiconductor technology, the development of flat-panel screens also with leap.In many flat-panel screens, LCD becomes the main flow in market then because of having advantageous characteristic such as high spatial utilization ratio, low consumpting power, radiationless and low electromagnetic interference (EMI).
The backlight design of conventional liquid crystal is a white light, and white light source enters after the liquid crystal panel, by being relatively arranged on the locational colored filter of each pixel (pixel) (color filter), and is demonstrated the color of each pixel.In addition, in traditional LCD, all can be provided with on each location of pixels with red (R), green (G) and hinder the chromatic filter layer that is constituted, and be known as sub-pixel (sub-pixel) with the pixel of the position of blue (B) three kinds of colors with respect to red (R), green (G) with the look of blue (B) three kinds of colors.In every case human eye can observed all colours, all can obtain with different depth level mix and match with blueness (B) primaries via aforementioned redness (R), green (G).When RGB three coloured light all reach the brightlyest, what mix is white, and when RGB closes, then mixing what come out is black.Again can be according to its color depth level between the darkest (black) and the brightest (white) different, and be divided into many gray levels (grey level).
Yet light only has 1/3rd the light can be by leaving chromatic filter layer after entering chromatic filter layer, in other words, has 2/3rds light to be absorbed by the look resistance and slattern, and the transmittance that causes display panel integral body is low and cause brightness not good.Moreover, make the required material cost of three look looks resistance, also be a very important expenditure.
Therefore, more and more be subjected to important this moment, how overcome or improve the problems referred to above, the real problem that overcomes on production technology, demanded urgently for present display panel in the high brightness demand of LCD.
Summary of the invention
The invention provides a kind of display panel, it has preferable image quality.
The present invention provides a kind of manufacture method of display panel in addition, and it passes through the thickness of display medium in the regulator pixel, and makes display panel present preferable image quality.
The present invention provides a kind of electrooptical device again, and it has preferable image quality.
The present invention more provides a kind of manufacture method of electrooptical device, to make above-mentioned electrooptical device.
The present invention proposes a kind of display panel, and it comprises a pair of substrate, a chromatic filter layer and a display medium.This has a plurality of pixels to substrate, and each pixel comprises one first sub-pixel, one second sub-pixel, one the 3rd sub-pixel and one the 4th sub-pixel at least.Chromatic filter layer is arranged at this to substrate on one of them, and wherein chromatic filter layer comprises that at least one first color filter pattern is positioned at that first sub-pixel, one second color filter pattern are positioned at second sub-pixel, one the 3rd color filter pattern is positioned at the 3rd sub-pixel and one the 4th color filter pattern is positioned at the 4th sub-pixel.Display medium is arranged at this between the substrate, the display medium that wherein is positioned at first sub-pixel has one first thickness T 1, the display medium that is positioned at second sub-pixel has one second thickness T 2, the display medium that is positioned at the 3rd sub-pixel has one the 3rd thickness T 3, the display medium that is positioned at the 4th sub-pixel has one the 4th thickness T 4, wherein T1〉T2〉T3 and T1〉T4〉T3.
The present invention proposes a kind of manufacture method of display panel, and it comprises the following steps.At first, provide a pair of substrate, wherein this has a plurality of pixels to substrate, and each pixel comprises one first sub-pixel, one second sub-pixel, one the 3rd sub-pixel and one the 4th sub-pixel at least.Then, be provided with a chromatic filter layer in this to substrate on one of them, wherein chromatic filter layer comprises that at least one first color filter pattern is positioned at that first sub-pixel, one second color filter pattern are positioned at second sub-pixel, one the 3rd color filter pattern is positioned at the 3rd sub-pixel and one the 4th color filter pattern is positioned at the 4th sub-pixel.Afterwards, one display medium is set between this is to substrate, the display medium that wherein is positioned at first sub-pixel has one first thickness T 1, the display medium that is positioned at second sub-pixel has one second thickness T 2, the display medium that is positioned at the 3rd sub-pixel has one the 3rd thickness T 3, the display medium that is positioned at the 4th sub-pixel has one the 4th thickness T 4, wherein T1〉T2〉T3 and T1〉T4〉T3.
The present invention more proposes an electrooptical device, comprises the display panel of the foregoing description.
The present invention proposes the manufacture method of an electrooptical device again, comprises the manufacture method of the display panel of the foregoing description.
In sum, the present invention is by setting up a sub-pixel and suitably regulating and control display medium thickness corresponding to each sub-pixel, improving brightness and the not good problem of contrast in the traditional design, and then reach and improve luminescence efficiency, power saving, saving cost and the preferable effect of image display quality.
Description of drawings
Fig. 1 is the vertical view of a kind of display panel of the present invention.
Fig. 2～Fig. 9 is the diagrammatic cross-section of a kind of display panel of one embodiment of the invention.
Figure 10 does not do the gamma curve of suitable adjustment according to sub-pixel for its display medium thickness of a kind of display panel.
Figure 11 and Figure 12 be respectively among Figure 10 red sub-pixel in the coordinate of X and Y colourity and the relation of gray level.
Figure 13 is the gamma curve of a kind of display panel of one embodiment of the invention.
Figure 14～Figure 15 is respectively the gamma curve of a kind of display panel of the present invention under the display medium thickness of different subpixel.
Figure 16～Figure 21 is respectively that the gamma curve of white picture is adjusted to γ=1.9,2.0,2.1,2.3,2.4,2.5 o'clock gamma graph.
Figure 22 is that the gamma curve of white picture is adjusted to γ=2.2 o'clock, the gamma graph of TR=TG=TB=TW=3.6um.
Figure 23 is that the gamma curve of white picture is adjusted to γ=2.2 o'clock, TR=TG=TB=3.8um and the gamma graph of TW=3.6um.
Figure 24 is that the gamma curve of white picture is adjusted to γ=2.2 o'clock, TY〉TG〉TB and TY〉TW〉gamma graph of TB.
Figure 25 is that the gamma curve of white picture is adjusted to γ=2.2 o'clock, TR〉TG〉TB and TY〉TW〉gamma graph of TB.
Figure 26 is the synoptic diagram of a kind of electrooptical device of one embodiment of the invention.
Drawing reference numeral
100,300,400,500,600,700,800,900: display panel
110a, 110b: substrate
112: pixel
112a: first sub-pixel
112b: second sub-pixel
112c: the 3rd sub-pixel
112d: the 4th sub-pixel
120: chromatic filter layer
120a: the first color filter pattern
120b: the second color filter pattern
120c: the 3rd color filter pattern
120d: the 4th color filter pattern
130: display medium
140,540: overlayer
320,420,520,920: overlayer
T1, T2, T3, T4: thickness
T1, t2, t3, t4: thickness
T1 ', t2 ', t3 ', t4 ': thickness
H1, h2, h3, h4: thickness
A: display panel
B: electronic component
C: electrooptical device
Embodiment
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and cooperate appended accompanying drawing to be described in detail below.
Fig. 1 is the vertical view of a kind of display panel of the present invention, please refer to Fig. 1, in the partial pixel 112 that Fig. 1 illustrated, each pixel 112 comprises one first sub-pixel 112a, one second sub-pixel 112b, one the 3rd sub-pixel 112c and one the 4th sub-pixel 112d all at least.Yet the present invention is not particularly limited the sub-pixel quantity upper limit that 112 of each pixels can comprise, for instance, in other embodiment, each pixel 112 can comprise 5,6,7 or 8 sub-pixels.In addition, in Fig. 1 of the embodiment of the invention, described sub-pixel 112a, 112b, 112c and 112d all independently are provided with out of the ordinary, but are not limited thereto.In the embodiment that other does not illustrate, with vertical view, at least one the 4th sub-pixel 112d can be arranged between the first sub-pixel 112a, the second sub-pixel 112b and the 3rd sub-pixel 112c or at least one the 4th sub-pixel 112d can be arranged at the first sub-pixel 112a, the second sub-pixel 112b and the 3rd sub-pixel 112c wherein among at least one.
In the present embodiment, the color that the first sub-pixel 112a, one second sub-pixel 112b, one the 3rd sub-pixel 112c and one the 4th sub-pixel 112d are presented is red, blue, green and white in regular turn, but is not limited to this.In other embodiment, also can adopt other to be positioned at color on the chromaticity coordinates, for example yellow, purple, brown, yellow, cyan, pink, orange or color that other is suitable.If pixel 112 comprises four sub-pixels at least, then less preferredly, the mixed color that first, second and third sub-pixel 112a, 112b and 112c presented is white (transparent).Preferably, the mixed light color that presented of the first, second, third and the 4th sub-pixel 112a, 112b, 112c and 112d is white (transparent).
Moreover display medium (not being illustrated in Fig. 1) is arranged between two substrates of corresponding each sub-pixel, and display medium for example is liquid crystal material, self-luminescent material, electrophoresis material, other suitable material or above-mentioned combination.Embodiments of the invention for example are that liquid crystal material or electrophoresis material are example with display medium, but are not limited thereto.In addition, and the display medium that is positioned at the first sub-pixel 112a has one first thickness T 1 (not being illustrated in Fig. 1), the display medium that is positioned at the second sub-pixel 112b has one second thickness T 2 (not being illustrated in Fig. 1), the display medium that is positioned at the 3rd sub-pixel 112c has one the 3rd thickness T 3 (not being illustrated in Fig. 1), and the display medium that is positioned at the 4th sub-pixel 112d has one the 4th thickness T 4 (not being illustrated in Fig. 1), wherein T1〉T2〉T3 and T1〉T4〉T3.Specifically, be not particularly limited the size of T2 and T4 herein, in other words, relation can be T1 between the thickness of the aforementioned display medium that is positioned at different subpixel〉T2〉T4〉T3, T1〉T4〉T2〉T3 or T1〉T4=T2〉T3.T1 preferably〉T4=T2〉T3.Therefore, cause the difference in thickness of the display medium in each sub-pixel of the present invention, please check each following embodiment.
First embodiment:
Fig. 2 is the diagrammatic cross-section of a kind of display panel of one embodiment of the invention.Please be simultaneously with reference to Fig. 1 and Fig. 2, display panel 100 comprises a pair of substrate 110a, 110b, a chromatic filter layer 120 and a display medium 130.This is to substrate 110a, and 110b has a plurality of pixels 112, and each pixel 112 comprises one first sub-pixel 112a, one second sub-pixel 112b, one the 3rd sub-pixel 112c and one the 4th sub-pixel 112d at least.
In the present embodiment, on substrate 110a, has an overlayer 140, wherein overlayer 140 thickness that is positioned at the first sub-pixel 112a, the second sub-pixel 112b, the 3rd sub-pixel 112c and the 4th sub-pixel 112d is respectively h1, h2, h3 and h4, wherein h1＜h2＜h3, and h1＜h4＜h3.For example, overlayer 140 can be active cell array layer, flatness layer, electrode layer, both alignment layers or its combination.
In addition, in the present embodiment, substrate 110a, 110b wherein one material are to comprise inorganic transparent material (as: glass, quartzy, or other suitable material, or above-mentioned combination), organic transparent material (as: polyalkenes Ju Hai class, polyalcohols, polyesters, rubber, thermoplastic polymer, thermosetting polymer, the poly aromatic hydro carbons, poly-methyl propionyl acid methyl esters class, polycarbonate-based, or other suitable material, or above-mentioned derivant, or above-mentioned combination), inorganic transparent materials (as: silicon chip, pottery, or other suitable material, or above-mentioned combination), or above-mentioned combination.
In the present embodiment, the formation method of chromatic filter layer 120 for example is by steps such as spin coating process (spincoating) and baking process, the first color filter pattern 120a that forms patterning in regular turn in different sub-pixel area for example is red filter pattern (R), the second color filter pattern 120b for example is green tint filter pattern (G), the 3rd color filter pattern 120c for example is blue color filter pattern (B), the 4th color filter pattern 120d for example is transparent (white) filter pattern (W), forms a plurality of light-shielding patterns (not illustrating) between each sub-pixel afterwards again; Or form earlier that to form the first color filter pattern 120a again after a plurality of light-shielding patterns for example be that red (R), the second color filter pattern 120b for example are that green (G), the 3rd color filter pattern 120c for example are that blue (B) and the 4th color filter pattern 120d for example are transparent (W) color filter pattern.Certainly, be not particularly limited the production method of chromatic filter layer 120 herein, in other embodiments, also can make chromatic filter layer 120 by ink jet printing method (ink-jet printing) or other technology that is fit to.
Second embodiment:
Fig. 3 is the diagrammatic cross-section of a kind of display panel of one embodiment of the invention, please refer to Fig. 3, display panel 300 is similar to the display panel 100 among first embodiment, please consult the description of Fig. 1 and first embodiment Fig. 2, in this superfluous words no longer, and present embodiment and the foregoing description difference are, in the present embodiment, also comprise on the aforementioned chromatic filter layer 120 that is positioned on the substrate 110b forming an overlayer 320, to cover chromatic filter layer 120.What deserves to be mentioned is, in the present embodiment, be arranged at the overlayer 320 of the 4th sub-pixel 112d, preferably, also can be used as the color filter pattern of the 4th sub-pixel 112d simultaneously, form the 4th sub-pixel 112d so can save, for example: the time and the cost of transparent (white) filter pattern (W).
Specifically; overlayer 320 can be the combination of a protective seam or a protective seam and an electrode layer; protective seam can be the single or multiple lift material; and its material is polymkeric substance preferably; for example be acryl resin (acrylic resin) or phenolics (novolac resin); electrode layer can be the single or multiple lift material, and its material for example is an indium tin oxide; indium-zinc oxide; indium tin zinc oxide; hafnia; indium oxide; tin oxide; zinc paste; aluminium oxide; the aluminium tin-oxide; the aluminium zinc oxide; the cadmium tin-oxide; cadmium zinc oxide or above-mentioned combination.In the present embodiment, identical in fact with respect to the first color filter pattern 120a, the second color filter pattern 120b, the 3rd color filter pattern 120c with the thickness of the overlayer 320 of the 4th color filter pattern 120d.That is to say that the overlayer 320 that is positioned on the first, second, third and the 4th sub-pixel 112a, 112b, 112c and the 112d presents flat condition in fact.
What deserves to be mentioned is that in the present embodiment, be positioned at display medium 130 thickness T 1, T2, T3 and the T4 of different subpixel, the difference of its thickness is contributed by the height that is positioned at the overlayer 140 on the substrate 110a.
The 3rd embodiment:
Fig. 4 is the diagrammatic cross-section of a kind of display panel of one embodiment of the invention, please refer to Fig. 4, display panel 400 is similar to the display panel 100 among first embodiment, please consult the description of Fig. 1 and first embodiment Fig. 2, in this superfluous words no longer, and the present embodiment and the first embodiment difference are, in the present embodiment, chromatic filter layer 120 is on the overlayer 140 that is arranged on the substrate 110a.In other words, substrate 110a one is integrated with the active array substrate (Color Filter on Arraysubstrate, COA substrate) of chromatic filter layer.In other possible embodiment, aforementioned chromatic filter layer 120 can also be arranged under the overlayer 140 on the substrate 110a, in other words, substrate 110a one is integrated with the colored optical filtering substrates (Array on Color Filter substrate, AOC substrate) of active array layer.Wherein, the rete of overlayer 140 can be active cell array layer, flatness layer, electrode layer, both alignment layers or its combination or other suitable rete.
What deserves to be mentioned is that in the present embodiment, be positioned at display medium 130 thickness T 1, T2, T3 and the T4 of different subpixel, the difference of its thickness is contributed by the height that is positioned at the overlayer 140 on the substrate 110a.
The 4th embodiment:
Fig. 5 is the diagrammatic cross-section of a kind of display panel of one embodiment of the invention, please refer to Fig. 5, display panel 100 among the display panel 500 and first embodiment is similar, please consult the description of Fig. 1 and first embodiment Fig. 2, in this superfluous words no longer, and the present embodiment and the first embodiment difference are, at first, in the present embodiment, have an overlayer 540 on the substrate 110a, it has the identical thickness of essence with respect to the first sub-pixel 112a, the second sub-pixel 112b, the 3rd sub-pixel 112c and the 4th sub-pixel 112d part.Secondly, the first color filter pattern 120a, the second color filter pattern 120b, the 3rd color filter pattern 120c are identical in fact with the thickness of the 4th color filter pattern 120d.Moreover, in the present embodiment, also comprise on the aforementioned chromatic filter layer 120 that is positioned on the substrate 110b forming an overlayer 520, to cover chromatic filter layer 120.Overlayer 520 is respectively t1 ', t2 ', t3 ' and t4 ', wherein t1 '＜t2 '＜t3 ', and t1 '＜t4 '＜t3 ' in the thickness of the first sub-pixel 112a, the second sub-pixel 112b, the 3rd sub-pixel 112c and the 4th sub-pixel 112d.What deserves to be mentioned is, in the present embodiment, be arranged at the overlayer 520 of the 4th sub-pixel 112d part, preferably, also, form the 4th color optical filtering case so can save, for example: the time and the cost of transparent (white) filter pattern (W) simultaneously as the color filter pattern of the 4th sub-pixel 112d.
What deserves to be mentioned is, in the present embodiment, be positioned at display medium 130 thickness T 1, T2, T3 and the T4 of different subpixel, the difference of its thickness is contributed by overlayer 520 height that are positioned on the substrate 110b.
The 5th embodiment:
Fig. 6 is the diagrammatic cross-section of a kind of display panel of one embodiment of the invention, please refer to Fig. 6, display panel 600 is similar to the display panel 500 among the 4th embodiment, please consult the 4th embodiment and relevant description also can be consulted Fig. 2 of the Fig. 1 and first embodiment simultaneously, in this superfluous words no longer, and present embodiment and the 4th embodiment difference are, in the present embodiment, chromatic filter layer 120 is on the overlayer 540 that is arranged on the substrate 110a, in other words, substrate 110a one is integrated with the active array substrate (Color Filter on Array substrate, COA substrate) of chromatic filter layer.
What deserves to be mentioned is, in the present embodiment, be positioned at display medium 130 thickness T 1, T2, T3 and the T4 of different subpixel, the difference of its thickness is contributed by overlayer 520 height that are positioned on the substrate 110b.
The 6th embodiment:
Fig. 7 is the diagrammatic cross-section of a kind of display panel of one embodiment of the invention, please refer to Fig. 7, display panel 600 among display panel 700 and the 5th embodiment is similar, please consult the 5th embodiment and relevant description also can be consulted Fig. 2 of the Fig. 1 and first embodiment simultaneously, in this superfluous words no longer, and present embodiment and the 5th embodiment difference are, at first, in the present embodiment, has an overlayer 540 on the substrate 110a.In addition, overlayer 540 has the identical thickness of essence with respect to the first sub-pixel 112a, the second sub-pixel 112b, the 3rd sub-pixel 112c and the 4th sub-pixel 112d part.Secondly, in the present embodiment, also have another overlayer 720 on the substrate 110b, it has the identical thickness of essence with respect to the first color filter pattern 120a, the second color filter pattern 120b, the 3rd color filter pattern 120c with the overlayer 720 of the 4th color filter pattern 120d.Moreover chromatic filter layer 120 is arranged on the substrate 110a, and in the present embodiment, chromatic filter layer 120 is on the overlayer 540 that is arranged on the substrate 110a.Wherein the thickness of the first color filter pattern 120a, the second color filter pattern 120b, the 3rd color filter pattern 120c and the 4th color filter pattern 120d is respectively t1, t2, t3 and t4, wherein t1＜t2＜t3, and t1＜t4＜t3.In other words, in the time of on chromatic filter layer 120 is the overlayer 540 that is arranged on the substrate 110a, substrate 110a one is integrated with the active array substrate (Color Filter on Arraysubstrate, COA substrate) of chromatic filter layer.When, chromatic filter layer 120 is under the overlayer 540 that is arranged on the substrate 110a time, substrate 110a one is integrated with the colored optical filtering substrates (Array onColor Filter substrate, AOC substrate) of active array layer.
What deserves to be mentioned is, in the present embodiment, be positioned at display medium 130 thickness T 1, T2, T3 and the T4 of different subpixel, the difference of its thickness is by being positioned at the first color filter pattern 120a, the second color filter pattern 120b on the substrate 110a, the 3rd color filter pattern 120c different contribution of thickness with the 4th color filter pattern 120d.
The 7th embodiment:
Fig. 8 is the diagrammatic cross-section of a kind of display panel of one embodiment of the invention, please refer to Fig. 8, display panel 800 is similar to the display panel 700 among the 6th embodiment, please consult the 6th embodiment and relevant description also can be consulted Fig. 2 of the Fig. 1 and first embodiment simultaneously, in this superfluous words no longer, and the present embodiment difference is, in the present embodiment, from the above, chromatic filter layer 120 is to be arranged on the substrate 110b.In the present embodiment, the thickness of the first color filter pattern 120a, the second color filter pattern 120b, the 3rd color filter pattern 120c and the 4th color filter pattern 120d is respectively t1, t2, t3 and t4, wherein t1＜t2＜t3, and t1＜t4＜t3.
What deserves to be mentioned is, in the present embodiment, be positioned at display medium 130 thickness T 1, T2, T3 and the T4 of different subpixel, the difference of its thickness is that thickness t 1, t2, t3 and the t4 by the first color filter pattern 120a, the second color filter pattern 120b, the 3rd color filter pattern 120c and the 4th color filter pattern 120d on the chromatic filter layer 120 that is positioned on the substrate 110b contributed.Therefore, be positioned at first thickness T 1 of the display medium 130 of the first sub-pixel 112a, be positioned at second thickness T 2 of the display medium 130 of the second sub-pixel 112b, be positioned at the 3rd thickness T 3 of the display medium 130 of the 3rd sub-pixel 112c, and the pass of the 4th thickness T 4 that is positioned at the display medium 130 of the 4th sub-pixel 112d is T1〉T2〉T3 and T1〉T4〉T3.
The 8th embodiment:
Fig. 9 is the diagrammatic cross-section of a kind of display panel of one embodiment of the invention, please refer to Fig. 9, display panel 900 is similar to the display panel 800 among the 7th embodiment, please consult the 7th embodiment and relevant description also can be consulted Fig. 2 of the Fig. 1 and first embodiment simultaneously, in this superfluous words no longer, and the present embodiment difference is, in the present embodiment, also comprise on the aforementioned chromatic filter layer 120 that is positioned on the substrate 110b forming an overlayer 920, and overlayer 920 is to be covered in the first color filter pattern 120a, the second color filter pattern 120b, on the surface of the 3rd color filter pattern 120c and the 4th color filter pattern 120d.What deserves to be mentioned is, in the present embodiment, be arranged at the overlayer 920 of the 4th sub-pixel 112d part, preferably, also the while is as the color filter pattern of the 4th sub-pixel 112d, so can save time and the cost that forms transparent (white) filter pattern (W).
Specifically, overlayer 920 can be the combination of a protective seam or a protective seam and an electrode layer.Protective seam can be the single or multiple lift structure, and its material for example is acryl resin (acrylic resin) or phenolics (novolac resin).Electrode layer can be the single or multiple lift structure, and its material for example is indium tin oxide, indium-zinc oxide, indium tin zinc oxide, hafnia, zinc paste, aluminium oxide, aluminium tin-oxide, aluminium zinc oxide, cadmium tin-oxide, cadmium zinc oxide or above-mentioned combination.
What deserves to be mentioned is, in the present embodiment, be positioned at display medium 130 thickness T 1, T2, T3 and the T4 of different subpixel, the difference of its thickness is that thickness t 1, t2, t3 and the t4 by the first color filter pattern 120a, the second color filter pattern 120b, the 3rd color filter pattern 120c and the 4th color filter pattern 120d on the chromatic filter layer 120 that is positioned on the substrate 110b contributed.Therefore, be positioned at first thickness T 1 of the display medium 130 of the first sub-pixel 112a, be positioned at second thickness T 2 of the display medium 130 of the second sub-pixel 112b, be positioned at the 3rd thickness T 3 of the display medium 130 of the 3rd sub-pixel 112c, and the pass of the 4th thickness T 4 that is positioned at the display medium 130 of the 4th sub-pixel 112d is T1〉T2〉T3 and T1〉T4〉T3.
Compared to traditional three primary colors (RGB) display, at least four look displays, for example: (RGBW), because of adding the 4th sub-pixel, for example: the W sub-pixel, thus can improve the penetrance of backlight to display panel, thereby have and promote brightness, power saving and advantage cheaply.But because of the 4th sub-pixel, for example: the brightness of W sub-pixel is far above first to the 3rd sub-pixel, for example: the brightness of RGB sub-pixel is easy to make the image that manifests to produce serious colour cast, and then reduces image quality.Be the practice of the display medium thickness of regulator pixel among proof the present invention, with the raising image quality positive influences arranged really, please refer to following experiment reducing colour cast.
Because display must provide the picture of suitable image gray levels performance with suiting measures to local conditions; add that brightness that in fact human eye can experience is not linear for the variation of ambient light intensity; therefore; the deviation of the image gray levels that causes for the brightness that improves because of user place environment; usually can be so that an external resistor to be set on hardware; to produce one voltage-penetrance curve (V-T curve), be used for describing the light transmission features of liquid crystal panel under the different voltages.The funtcional relationship that gamma curve (Gamma curve) is followed is T=(i/g) γ, and wherein T is a penetrability, and g is the gray level sum, and i is a certain gray level among the gray level sum g, and γ is a constant.At least four look displays of the present invention are that the RGBW of white (transparent) color is used as example with the mixed color that can present, but are not limited thereto.When our gamma curve at the white picture of adjustment at least four look displays, optimum condition is at least four sub-pixels, for example: the voltage of four sub-pixels of RGBW-penetrance curve overlaps, make when gamma curve when white picture is adjusted to γ=2.2, at least four sub-pixels, for example: the gamma curve of four sub-pixels of RGBW also is γ=2.2, and can reach preferable image quality this moment.
But when making panel, if at least four sub-pixels, for example: the display medium thickness of four sub-pixels of RGBW is not through suitably design, cause at least four sub-pixels, for example: the voltage of four sub-pixels of RGBW-penetrance curve does not overlap, this moment is if be adjusted to γ=2.2 o'clock with the gamma curve of white picture, at least four sub-pixels, for example: the gamma curve of four sub-pixels of RGBW can all not be γ=2.2, and because of the 4th sub-pixel, for example: the brightness of W sub-pixel is far above first to the 3rd sub-pixel, for example: the brightness of RGB sub-pixel, occupy bigger weight, win to the 3rd sub-pixel, for example so can make: the gamma curve of three sub-pixels of RGB causes at least four sub-pixels more away from γ=2.2, for example: RGBW display image bad, for example the color trace of pure color (color tracking) can be more serious than three look displays.
Figure 10 is that its display medium thickness of a kind of display panel is not made the suitably gamma curve of adjustment according to sub-pixel.Please refer to Figure 10, the thickness of the display medium of four sub pixels of the display of Figure 10 is not through suitably adjusting, so display medium thickness T R=3.6um of red sub-pixel, the display medium thickness T G=3.6um of green sub-pixels, the display medium thickness T B=3.6um of blue subpixels, and the display medium thickness T W=4.2um of transparent (white) sub-pixel is an example.X-axis is represented number of greyscale levels, and Y-axis is represented the penetrance of light.When the gamma curve of white picture was adjusted to γ=2.2, the voltage of the sub-pixel of each color-the neither meeting of penetrance curve gamma curve equaled 2.2 (γ=2.2), and at least four sub-pixels, and for example: the gamma curve of RGBW can obviously be separated.
Figure 11 and Figure 12 be respectively among Figure 10 red sub-pixel in the coordinate of X and Y colourity and the relation of gray level.Please also refer to Figure 11 and Figure 12, ditto described, because the brightness of transparent (white) sub-pixel W is far above the brightness of three primary colors sub-pixel RGB, so when the display medium thickness of sub-pixel is unjustified, transparent (white) sub-pixel W can occupy higher weight in the overall brightness summation, and make brightness originally just the gamma curve of darker red sub-pixel R cause red color trace (color tracking) to show to depart from desirable curve more serious more away from γ=2.2.
Figure 13 is the gamma curve of a kind of display panel of one embodiment of the invention.Please refer to Figure 13, the thickness of the display medium of at least four sub-pixels of its display is through suitably design and adjustment.At least four sub-pixels of the present invention are that the RGBW of white (transparent) color is an example with the mixed color that can present, but are not limited thereto.Specifically, the display medium thickness of red sub-pixel is example with TR=4.2um, the display medium thickness of green sub-pixels is example with TG=3.8um, the display medium thickness of blue subpixels is example with TB=3.5um, and the display medium thickness of transparent (white) sub-pixel is with the TW=3.8um example.Display medium thickness of the present invention only is example, and is non-in order to limit scope of the present invention.X-axis is represented number of greyscale levels, and Y-axis is represented the penetrance of light.When the gamma curve of white picture is adjusted to γ=2.2, voltage-penetrance curve and at least four sub-pixels, for example: an ancient woman's ornament Maqu line of RGBW nearly all is 2.2 (γ=2.2).
Can know by Figure 10～Figure 13 and to learn that the practice of display medium thickness between each sub-pixel of regulation and control among the present invention has positive influences really for reducing colour cast and improving image quality.In other words, the thickness of the display medium by adjusting sub-pixel can make at least four sub-pixels, and for example: the gamma curve of RGBW is nearly all in γ=2.2, and relatively its image quality is also preferable.
In addition, for obtaining preferable image quality, at least four sub-pixels of display, for example: the relation between the display medium thickness of RGBW is required to be: TR〉TG〉TB and TR〉TW〉TB, so can make the voltage-penetrance curve (V-T curve) of each sub-pixel approaching as far as possible, and then it is approaching that its gamma curve also can be tried one's best, to present preferable image quality.Yet the present invention is the magnitude relationship between restricted T G and TW not, and except TG=TW as shown in Figure 13, TG also can be greater than TW or less than TW.To be that example is done explanation below with Figure 15 and Figure 16.
Figure 14～Figure 15 is respectively the gamma curve of a kind of display panel of the present invention under the display medium thickness of different subpixel.Please refer to Figure 14, the thickness of the display medium of each sub-pixel of display is adjusted to through suitably designing: TR=4.2um, and TG=3.8um, TB=3.5um, and TW=3.6um is the example explanation.That is TR〉TG〉TB, TR〉TW〉TB and TG〉TW.Similarly, when the gamma curve of white picture is adjusted to γ=2.2, the voltage of three primary colors sub-pixel RGB-penetrance curve overlaps haply, and near γ=2.2, and voltage-penetrance curve of transparent (white) sub-pixel W is a little less than the gamma curve of three-primary colours sub-pixel RGB.
Please refer to Figure 15, the thickness of the display medium of at least four sub-pixels is through suitably design and adjustment in the display.At least four sub-pixels of the present invention are that the RGBW of white (transparent) color is an example with the mixed color that can present, but are not limited thereto.Specifically, TR=4.2um, TG=3.8um, TB=3.5um, and TW=4.0um is the example explanation.That is TR〉TG〉TB, TR〉TW〉TB and TG＜TW.X-axis is represented number of greyscale levels, and Y-axis is represented the penetrance of light.When the gamma curve of white picture was adjusted to γ=2.2, the voltage of three primary colors sub-pixel RGB-penetrance curve also overlapped haply near γ=2.2, and voltage-penetrance curve of transparent (white) sub-pixel W is a little more than the gamma curve of each sub-pixels of RGB.
In addition, though a plurality of before example all with the constant of γ=2.2 as gamma curve, the present invention does not only limit in γ=2.2 and o'clock can obtain better display quality.For example, γ also can be 1.9,2.0,2.1,2.3,2.4,2.5 or other suitable constants.To be that example is done explanation below with Figure 16～Figure 21.
Figure 16～Figure 21 is respectively that the gamma curve of white picture is adjusted to γ=1.9,2.0,2.1,2.3,2.4,2.5 o'clock gamma graph.Can know by Figure 16～Figure 21 and to learn that the practice of display medium thickness between each sub-pixel of regulation and control among the present invention is in γ=1.9,2.0,2.1,2.3,2.4,2.5 the time, the gamma curve of each color sub-pixel does not still have obviously and departs from, and has positive influences for reducing colour cast and improving image quality.
Figure 22 is that the gamma curve of white picture is adjusted to γ=2.2 o'clock, and TR=TG=TB=TW=3.6um is the gamma graph of example.Figure 23 is that the gamma curve of white picture is adjusted to γ=2.2 o'clock, TR=TG=TB=3.8um and TW=3.6um is the gamma graph of example.Can know by Figure 22～Figure 23 and to learn, when three sub-pixels, for example: the display medium layer thickness of RGB and the 4th sub-pixel, for example: when the not special process of the display dielectric layer of W designed and adjusts, the gamma curve of each color sub-pixel can very significantly depart from γ=2.2.
In addition, above-mentioned at least four sub-pixels, for example: the thickness of the display medium of red, green, blue, transparent four looks (RGBW) sub-pixel adjusts and can have positive influences for the minimizing colour cast and the raising image quality of display.And for other kinds color sub-pixel, for example be yellow, green, blue, transparent (YGBW), the effect that then reduces colour cast and raising image quality is limited.That is to say, when the mixed color that wherein three presented at least in first to fourth sub-pixel is not equal to white (transparent) in fact, limited for the effect that reduces colour cast and raising image quality, even to no effect, will be that example is done explanation below with Figure 24～Figure 25.
Figure 24 is that the gamma curve of white picture is adjusted to γ=2.2 o'clock, the display medium thickness T Y=4.0um of yellow sub-pixel, the display medium thickness T G=3.8um of green sub-pixels, the display medium thickness T B=3.5um of blue subpixels and the display medium thickness T W=3.6um of transparent (white) sub-pixel is an example, just TY〉TG〉TB and TY〉TW〉gamma graph of TB.Figure 25 is that the gamma curve of white picture is adjusted to γ=2.2 o'clock, TR=4.2um, and TG=3.8um, TB=3.5um, TY=4.0um, TW=3.6um are example.TR just〉TG〉TB and TY〉TW〉gamma graph of TB.Please earlier with reference to Figure 24, the gamut range that this display with YGBW four sub-pixels can show is little than the gamut range of RGBW four look displays, and promptly its color that can show is less.As additionally add the red R sub-pixel again in the display with YGBW four sub-pixels, as shown in figure 25, then whole colourity can be slightly better than Figure 24 in the performance of redness.But among above-mentioned Figure 24 and Figure 25, the gamma curve of each sub-pixel still can not exclusively concentrate on γ=2.2.
Figure 26 is the synoptic diagram of a kind of electrooptical device of one embodiment of the invention.Please refer to Figure 26, display panel A can electrically connect and be combined into an electrooptical device C with electronic component B, and display panel A for example be the foregoing description display panel 100,300,400,500,600,700,800 or 900 one of them.Display panel A manufacture method comprises the manufacture method of aforesaid display panel 100,300,400,500,600,700,800 or 900, assembles the gained display according to the manufacturing course of various electronic component B again, to obtain electrooptical device C.
In addition, electronic component B comprises as control element, executive component, treatment element, input element, memory cell, driving element, light-emitting component, protecting component, sensing element, detecing element or other function element or aforesaid combination.And the type of electrooptical device C comprises the panel in portable product (as mobile phone, video camera, camera, notebook computer, game machine, wrist-watch, music player, electronic mail transceiver, map navigator, digital photo or similar products like), video and audio product (as audio-visual projector or similar products like), screen, TV, billboard, the projector etc.
In sum, the present invention makes the voltage-penetrance curve of each sub-pixel approaching as far as possible haply by the thickness of display medium in each sub-pixel of regulation and control display panel, and adjusted gamma curve also can be tried one's best approaching, so can present preferable image quality.
Though the present invention discloses as above with embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little change and retouching, so protection scope of the present invention is when being as the criterion with claim institute confining spectrum.
Claims (18)
1. a display panel is characterized in that, described display panel comprises:
A pair of substrate, wherein this has a plurality of pixels to substrate, and each pixel comprises one first sub-pixel, one second sub-pixel, one the 3rd sub-pixel and one the 4th sub-pixel at least;
One chromatic filter layer, be arranged at this to substrate on one of them, wherein said chromatic filter layer comprises that at least one first color filter pattern is positioned at that described first sub-pixel, one second color filter pattern are positioned at described second sub-pixel, one the 3rd color filter pattern is positioned at described the 3rd sub-pixel and one the 4th color filter pattern is positioned at described the 4th sub-pixel;
One display medium, be arranged at this between the substrate, the described display medium that wherein is positioned at described first sub-pixel has one first thickness T 1, the described display medium that is positioned at described second sub-pixel has one second thickness T 2, the described display medium that is positioned at described the 3rd sub-pixel has one the 3rd thickness T 3, the described display medium that is positioned at described the 4th sub-pixel has one the 4th thickness T 4, wherein T1〉T2〉T3 and T1〉T4〉T3.
2. display panel as claimed in claim 1, it is characterized in that, the thickness of the described first color filter pattern, the described second color filter pattern, described the 3rd color filter pattern and described the 4th color filter pattern is respectively t1, t2, t3 and t4, wherein t1＜t2＜t3, and t1＜t4＜t3.
3. display panel as claimed in claim 1 is characterized in that described display panel more comprises an overlayer, covers described chromatic filter layer.
4. display panel as claimed in claim 3 is characterized in that, is arranged at the color filter pattern of the described overlayer of described these the 4th sub-pixel parts as described the 4th sub-pixel.
5. display panel as claimed in claim 3, it is characterized in that, described overlayer is respectively t1 ', t2 ', t3 ' and t4 ' in the thickness of described first sub-pixel, described second sub-pixel, described the 3rd sub-pixel and described the 4th sub-pixel, wherein t1 '＜t2 '＜t3 ', and t1 '＜t4 '＜t3 '.
6. display panel as claimed in claim 3, it is characterized in that, described display panel more comprises another overlayer, it is arranged on the different substrates with described overlayer, the thickness that wherein said another overlayer is positioned at described first sub-pixel, described second sub-pixel, described the 3rd sub-pixel and described the 4th sub-pixel is respectively h1, h2, h3 and h4, wherein h1＜h2＜h3, and h1＜h4＜h3.
7. display panel as claimed in claim 3 is characterized in that described display panel more comprises another overlayer, and itself and described chromatic filter layer are arranged on the same substrate.
8. display panel as claimed in claim 7, it is characterized in that, the thickness that described another overlayer is positioned at described first sub-pixel, described second sub-pixel, described the 3rd sub-pixel and described the 4th sub-pixel is respectively h1, h2, h3 and h4, wherein h1＜h2＜h3, and h1＜h4＜h3.
9. the manufacture method of a display panel is characterized in that, the manufacture method of described display panel comprises:
A pair of substrate is provided, and wherein this has a plurality of pixels to substrate, and each pixel comprises one first sub-pixel, one second sub-pixel, one the 3rd sub-pixel and one the 4th sub-pixel at least;
Be provided with a chromatic filter layer in this to substrate on one of them, wherein said chromatic filter layer comprises that at least one first color filter pattern is positioned at that described first sub-pixel, one second color filter pattern are positioned at described second sub-pixel, one the 3rd color filter pattern is positioned at described the 3rd sub-pixel and one the 4th color filter pattern is positioned at described the 4th sub-pixel;
One display medium is set between this is to substrate, the described display medium that wherein is positioned at described first sub-pixel has one first thickness T 1, the described display medium that is positioned at described second sub-pixel has one second thickness T 2, the described display medium that is positioned at described the 3rd sub-pixel has one the 3rd thickness T 3, the described display medium that is positioned at described the 4th sub-pixel has one the 4th thickness T 4, wherein T1〉T2〉T3 and T1〉T4〉T3.
10. the manufacture method of display panel as claimed in claim 9, it is characterized in that, the thickness of the described first color filter pattern, the described second color filter pattern, described the 3rd color filter pattern and described the 4th color filter pattern is respectively t1, t2, t3 and t4, wherein t1＜t2＜t3, and t1＜t4＜t3.
11. the manufacture method of display panel as claimed in claim 9 is characterized in that, described method comprises that more covering one overlayer is in described chromatic filter layer.
12. the manufacture method of display panel as claimed in claim 11 is characterized in that, is arranged at the color filter pattern of the described overlayer of described these the 4th sub-pixel parts as described the 4th sub-pixel.
13. the manufacture method of display panel as claimed in claim 11, it is characterized in that, the thickness that described overlayer is positioned at described first sub-pixel, described second sub-pixel, described the 3rd sub-pixel and described the 4th sub-pixel is respectively t1 ', t2 ', t3 ' and t4 ', wherein t1 '＜t2 '＜t3 ', and t1 '＜t4 '＜t3 '.
14. the manufacture method of display panel as claimed in claim 11, it is characterized in that, described method more comprises another overlayer of formation, it is positioned on the different substrates with described overlayer, the thickness that wherein said another overlayer is positioned at described first sub-pixel, described second sub-pixel, described the 3rd sub-pixel and described the 4th sub-pixel is respectively h1, h2, h3 and h4, wherein h1＜h2＜h3, and h1＜h4＜h3.
15. the manufacture method of display panel as claimed in claim 11 is characterized in that, described method more comprises another overlayer of formation, and it is positioned on the identical substrate with described chromatic filter layer.
16. the manufacture method of display panel as claimed in claim 9, it is characterized in that, the thickness that described another overlayer is positioned at described first sub-pixel, described second sub-pixel, described the 3rd sub-pixel and described the 4th sub-pixel is respectively h1, h2, h3 and h4, wherein h1＜h2＜h3, and h1＜h4＜h3.
17. an electrooptical device is characterized in that described electrooptical device comprises display panel as claimed in claim 1.
18. the manufacture method of an electrooptical device is characterized in that, described method comprises the manufacture method of display panel as claimed in claim 9.
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| CNA2009101283702A CN101510022A (en) | 2009-04-07 | 2009-04-07 | Display panel, photovoltaic device and production process thereof |
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