CN101907800A - Liquid crystal display panel and liquid crystal display - Google Patents
Liquid crystal display panel and liquid crystal display Download PDFInfo
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- CN101907800A CN101907800A CN2009100861122A CN200910086112A CN101907800A CN 101907800 A CN101907800 A CN 101907800A CN 2009100861122 A CN2009100861122 A CN 2009100861122A CN 200910086112 A CN200910086112 A CN 200910086112A CN 101907800 A CN101907800 A CN 101907800A
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Abstract
The invention relates to a liquid crystal display panel and a liquid crystal display. The liquid crystal display panel comprises a first substrate and a second substrate which are arranged in an involution way, the two substrates are correspondingly formed with a plurality of sub pixels which are arranged in matrix form, each sub pixel is respectively corresponding to colour membrane in one colour, the colours at least include a first colour and a second colour; wherein the area of the sub pixel in the first colour is larger than the area of the sub pixel in the second colour. The liquid crystal display comprises the liquid crystal display panel of the invention and also comprises a frame, a control circuit and a backlight module; wherein the liquid crystal display panel is inlaid in the frame and is connected with the control circuit, the backlight module is arranged at the outer side of the liquid crystal display panel, the light source in the backlight module includes a plurality of colour point light sources, and the colours of the colour point light sources at least include a first colour and a second colour. The invention can adjust lighting effect after light passes through the liquid crystal display panel by adjusting area proportional relation of all the sub pixels. The invention makes the most of luminous power of light source and improves light utilization factor.
Description
Technical field
The present invention relates to lcd technology, relate in particular to a kind of liquid crystal panel and LCD.
Background technology
LCD (Liquid Crystal Display; Hereinafter to be referred as: LCD) be present widely used flat-panel monitor, liquid crystal panel wherein is the important display unit of LCD.Liquid crystal panel usually by two substrates to box after the filling liquid crystal layer form, on liquid crystal panel, be formed with a plurality of sub-pixels that matrix form is arranged.For presenting coloured image, be provided with the color rete of corresponding each sub-pixel in the liquid crystal panel usually, present different colours after making light pass the color film of different colours.Common liquid crystal panel comprises array base palte and color membrane substrates at present, and the color rete that adopts resin to make is arranged on the color membrane substrates.
Because liquid crystal can not autoluminescence, so LCD needs the external world that light source is provided.Wherein, transmission-type LCD is provided with backlight in LCD inside light source is provided.At present, because of light emitting diode (Light Emitting Diode; Hereinafter to be referred as: LED) have advantages such as high colour gamut, energy-conservation, lightening, quick response, it more and more has been applied among the LCD as light source, and RGB_LED employing backlight is dynamically after the control, but the first mate improves contrast and the colour gamut of LCD.
Existing LED is that coloured pointolite LED with red (R), green (G), blue (B) three primary colours makes up and forms white light as a kind of technology of light source, then offers liquid crystal panel.No matter adopt the straight-down negative or the backlight of side-light type, LED all is arranged on the outside of liquid crystal panel, number by LED is set and the brightness of LED of all kinds make light present white before entering liquid crystal panel, and the white area source that meets the requirement of white point coordinate is provided for liquid crystal panel.After this white light enters array base palte after liquid crystal molecule rotatory polarization direction from the color membrane substrates outgoing, presents and the corresponding color of color resin.
But there is following defective in above-mentioned employing LED as the scheme of LCD light source: the light efficiency difference of red, green, blue three-primary color LED when presenting white light, the brightness that generally needs green LED brightness to be higher than red and blue led just can present white light.The means that prior art is taked for the acquisition white light source are: 1) adopt more green LED to improve green brightness, but reaching under the prerequisite of same brightness like this, will certainly increase the quantity of LED, and then cause cost to increase; 2) by controlling the brightness that the power supply pulse reduces red and blue led, this method can be sacrificed the light efficiency of red and blue led, and light utilization efficiency is lower, can reduce back light source brightness, and LED can not be made the best use of everything simultaneously, so cause the waste on the use cost.
Summary of the invention
The purpose of this invention is to provide a kind of liquid crystal panel and LCD, to improve the light utilization efficiency of LED.
For achieving the above object, the invention provides a kind of liquid crystal panel, comprise first substrate and second substrate that box is provided with, the corresponding a plurality of sub-pixels that are formed with the matrix form arrangement on the two substrates, each sub-pixel is the color film of corresponding a kind of color respectively, described color comprises first color and second color at least, and wherein: the area of the described first color sub-pixel is greater than the area of the second color sub-pixel.
For achieving the above object, the present invention also provides a kind of LCD that comprises liquid crystal panel of the present invention, also comprise framework, control circuit and module backlight, described liquid crystal panel is embedded in described framework and links to each other with described control circuit, described module backlight is arranged on the outside of described liquid crystal panel, wherein: the light source that comprises in the described module backlight is a plurality of coloured pointolites, and the color of described coloured pointolite comprises first color and second color at least.
Concrete, also comprising the 3rd color on the liquid crystal panel, first color is green, and second color is red, and the 3rd color is blue, and preferably the area of green sub-pixels is respectively greater than the area of red sub-pixel and the area of blue subpixels.
By above technical scheme as can be known, the present invention adopts the technological means of adjusting area ratio relation between each sub-pixels, can make and enter the light that does not present white before the liquid crystal panel and after seeing through liquid crystal panel, presenting white, therefore can control the transmitance of light of all kinds by the area of sub-pixel, the luminous power of having avoided adjusting light luminance before the process liquid crystal panel and having wasted light source is so can improve light utilization efficiency.Realize in LCD MODULE under the situation of same brightness, can reduce power or the quantity of LED in the backlight, thereby reduce cost of products.
Description of drawings
Fig. 1 is the structural representation of a kind of pixel layout in the liquid crystal panel that first embodiment of the invention provided;
Fig. 2 is the structural representation of another kind of pixel layout in the liquid crystal panel that first embodiment of the invention provided;
Fig. 3 is the structural representation of first kind of pixel layout in the liquid crystal panel that second embodiment of the invention provided;
Fig. 4 is the structural representation of second kind of pixel layout in the liquid crystal panel that second embodiment of the invention provided;
Fig. 5 is the structural representation of the third pixel layout in the liquid crystal panel that second embodiment of the invention provided;
Fig. 6 is the structural representation of the 4th kind of pixel layout in the liquid crystal panel that second embodiment of the invention provided;
Fig. 7 is the structural representation of the LCD that third embodiment of the invention provided.
Embodiment
The embodiment of the invention provides a kind of liquid crystal panel, comprise first substrate and second substrate that box is provided with, the corresponding a plurality of sub-pixels that are formed with the matrix form arrangement on the two substrates, each sub-pixel is the color film of corresponding a kind of color respectively, color comprises first color and second color at least, and the area of the first color sub-pixel is greater than the area of the second color sub-pixel.
The present invention concerns that by the area ratio of adjusting each sub-pixels adjusting light of all kinds sees through light efficiency after the liquid crystal panel, avoids suppressing the light loss that causes when light-source brightness is adjusted light efficiency, thereby can improve light utilization efficiency.
Concrete, also comprise the 3rd color, and first color be green, second color be a redness, the 3rd color is a blueness.Adopting three primary colours is technology of generally using at present.And because white light is higher to the light efficiency requirement of green light, so the present invention is provided with the area of green sub-pixels respectively greater than the area of red sub-pixel and the area of blue subpixels.
Make the area of green sub-pixels have multiple greater than the form of red sub-pixel and blue subpixels area respectively, for example can increase the area of each green sub-pixels or the quantity of increase green sub-pixels, also in conjunction with the accompanying drawings the present invention is described in further detail below by specific embodiment.
First embodiment
Fig. 1 is the structural representation of a kind of pixel layout in the liquid crystal panel that first embodiment of the invention provided.The liquid crystal panel of present embodiment comprises first substrate and second substrate that box is provided with, and is specially array base palte and color membrane substrates.The corresponding a plurality of sub-pixels that are formed with the matrix form arrangement on the two substrates, each sub-pixel is the color film of corresponding a kind of color respectively, and color film specifically can be arranged on the color membrane substrates.Color film color comprises redness, blueness and green, and then each sub-pixel specifically can be called green sub-pixels, red sub-pixel and blue subpixels, and the area of green sub-pixels is respectively greater than the area of red sub-pixel and the area of blue subpixels.
Concrete, in the present embodiment, the quantity of every kind of color institute corresponding sub-pixel equates, and the area of a green sub-pixels 11 is greater than the area of a red sub-pixel 12, also greater than the area of a blue subpixels 13.Fig. 1 has specifically illustrated the structure of 10 corresponding regions of a pixel, when the liquid crystal panel display image, be unit with pixel 10, for making this pixel 10 present colour, then this pixel 10 need comprise varicolored a plurality of sub-pix, a sub-pixel on the corresponding liquid crystal panel of each sub-pix.Specifically be to constitute a pixel 10 in the present embodiment by a red sub-pixel 12, a green sub-pixels 11 and a blue subpixels 13.In each pixel 10, red sub-pixel 12, green sub-pixels 11 and blue subpixels 13 are order and are set up in parallel.Preferably green sub-pixels 11 is arranged on the centre of red sub-pixel 12 and blue subpixels 13.
Fig. 2 is the structural representation of another kind of pixel layout in the liquid crystal panel that first embodiment of the invention provided.Than the distribution form of pixel shown in Fig. 1 10, a pixel 10 shown in Fig. 2 comprises a red sub-pixel 12, a green sub-pixels 11 and a blue subpixels 13 equally; But difference is that in each pixel 10, red sub-pixel 12 is set up in parallel with blue subpixels 13, green sub-pixels 11 on the concordant one side of red sub-pixel 12 and blue subpixels 13 in abutting connection with setting.
Liquid crystal panel of the present invention improves light utilization efficiency by the area of relative increase green sub-pixels, describes the principle that the present invention improves light utilization efficiency below against existing technologies in detail.
Suppose that at first then the luminosity of red LED is 9 lumens (1m) to the rated current of LED input 100 milliamperes (mA), the luminosity of green LED is 211m, and the luminosity of blue led is 2.81m.When the color film of light process, color film plays the effect of filtrator, the light of non-intrinsic colour can be filtered out, and only allows red light to pass through as the color film of redness, and filters out green and blue ray.
The area of each sub-pixel equates in the liquid crystal panel that prior art provided.For obtaining white light, need to suppress the brightness of ruddiness and blue light, the combination of the blue light of the green glow of 211m, the ruddiness of 6.131m and 1.511m can present white light.The light of above-mentioned brightness combination sees through each color film respectively after entering liquid crystal panel.(21+6.13+1.51) white light of 1m correspondingly, through presenting the green glow of 211m behind the green tint film, presents the blue light of 1.511m through presenting the ruddiness of 6.131m behind the red color film behind the process blue color film.Being equivalent to backlight provides the white light of (21+6.13+1.51) * 3=85.921m, and finally see through be the light of 21+6.13+1.51=28.641m.
The present invention has changed the area of sub-pixel, each sub-pixels accounts for an area percentage in the pixel and is 33.3% in the prior art, it is 44.8% that the present invention is provided with the area percentage of green sub-pixels in a pixel, the area percentage of red sub-pixel in a pixel is 30.8%, and the area percentage of blue subpixels in a pixel is 24.4%.This moment, the brightness to ruddiness and blue light did not suppress, and still injected liquid crystal panel with former brightness, i.e. 91m ruddiness, 211m green glow and 2.81m blue light.Be 9 * (30.8% ÷ 33.3%)=8.3161m then through the ruddiness brightness behind the red color film on the liquid crystal panel, through the green glow brightness behind the green tint film is 21 * (44.8% ÷ 33.3%)=28.2241m, is 2.8 * (22.4% ÷ 33.3%)=2.0501m through the blue light brightness behind the blue color film.The LED of identical luminous power, the sub-pixel design proposal of employing this embodiment of the invention, the luminance brightness that sees through liquid crystal panel can reach 8.316+28.224+2.050=38.591m, has improved about 35% than prior art.
The embodiment of the invention is adjusted through the light luminance after the liquid crystal panel by the area ratio that changes between green, redness and the blue subpixels, specifically be improve to see through the green glow of liquid crystal panel and the ratio between ruddiness and the blue light, green glow can determine the brightness of white light behind the mixed light substantially.So ratio of the area by each sub-pixels rationally is set, though what can make that light presented before entering liquid crystal panel is not white light, but after seeing through liquid crystal panel, can present white light, color is shown not influence, and brightness can significantly improve.Under the situation of obtaining the same brightness demonstration, can reduce the quantity of LED.For example, prior art can be that three LED of three primary colours are one group, and every group of tens of, hundreds of sub-pixel of LED correspondence simulated white area source is provided.Adopt technical scheme of the present invention, the quantity that can reduce the LED group reaches 25%, reaches original brightness requirement simultaneously.The minimizing of LED quantity has significantly reduced the cost of LED-backlit source LCD, has promoted the commercialization development process of this type of LCD.In addition, because the brightness that can reach increases, therefore can correspondingly reduce the power supply energy consumption of backlight, the energy-conservation of backlight is the important performance indexes of portable LCD.
Ratio between the sub-pixel area of all kinds can be calculated according to factors such as color film transmitance, LED brightness and obtain, make liquid crystal panel energy 100% utilize the luminosity of LED, after seeing through liquid crystal panel, obtain to satisfy the white light of white point coordinate requirement simultaneously, realize the maximization of light utilization efficiency.
Adopt technical scheme of the present invention, the area of red sub-pixel can equal the area of blue subpixels, preferably greater than the area of blue subpixels, can better meet and mix the demand of obtaining white light.If the color of liquid crystal panel is other colors, also can design the area ratio of sub-pixel according to light efficiency, make through the light behind the liquid crystal panel to present white light, at utmost utilize to enter the preceding light luminance of liquid crystal panel.
Second embodiment
Fig. 3 is the structural representation of first kind of pixel layout in the liquid crystal panel that second embodiment of the invention provided.The prize color of film of present embodiment still comprises redness, blueness and green three kinds, be with the difference of above-mentioned first embodiment: the area of each sub-pixel all equates, the quantity of green sub-pixels 11 is respectively more than the quantity of red sub-pixel 12 and blue subpixels 13, then the total area of green sub-pixels 11 is greater than the total area of red sub-pixel 12, also greater than the total area of blue subpixels 13.
The preferable distribution form of each sub-pixels that quantity is different as shown in Figure 3, red sub-pixel 12, two green sub-pixels 11 and a blue subpixels 13 constitute a pixel 10; In each pixel 10, red sub-pixel 12, green sub-pixels 11 and blue subpixels 13 orders and be set up in parallel, two green sub-pixels 11 are adjacent, and are arranged between red sub-pixel 12 and the blue subpixels 13.Perhaps, as shown in Figure 4, two green sub-pixels 11 also can be provided with red sub-pixel 12 and blue subpixels 13 compartment of terrains.
Perhaps, each sub-pixels can be matrix pattern and arrange setting, promptly adopts and piles up form, and as shown in Figure 5, two green sub-pixels 11 can be provided with across with red sub-pixel 12 and blue subpixels 13.Again or, as shown in Figure 6, two green sub-pixels 11 are set up in parallel, and are arranged on a side of red sub-pixel arranged side by side 12 and blue subpixels 13.
The technical scheme of present embodiment can also be saved the design cost again of liquid crystal panel except that improving as described in the first embodiment the light utilization efficiency.Because color rete can only be arranged on the substrate, for example can only be arranged on the color membrane substrates usually, so present embodiment can not change the design proposal of sub-pixel on the array base palte, only changes the layout of formed each color film on the color membrane substrates.Therefore can reduce the cost that array base palte designs again at least, be easier in existing actual production, promote.
In the present embodiment, for satisfying the white light requirement after shielding under the situation about determining in sub-pixel area, the luminous light efficiency that can further adjust ruddiness and blue light makes the light that finally sees through satisfy the requirement that mixes the acquisition white light, the light efficiency of raising ruddiness that particularly can be bigger.The adjustment of light efficiency and the area adjustment of sub-pixel are combined, improving brightness, and reduce design cost more as far as possible the available liquid crystal substrate.
In above-mentioned two embodiment, the color of color film can also comprise white, promptly can reach through the purpose that presents white light behind the liquid crystal panel by the area relationship of adjusting each sub-pixels.The Rankine-Hugoniot relations of sub-pixel can be form arranged side by side, that pile up as mentioned above in a pixel, perhaps also can adopt other the arrangement mode that can make pixel mix primary colours and present colour.
The 3rd embodiment
Fig. 7 is the structural representation of the LCD that third embodiment of the invention provided.Comprise the liquid crystal panel 20 of the arbitrary embodiment of the present invention in this LCD, and also comprise framework 30, control circuit (not shown) and module backlight.Liquid crystal panel 20 is embedded in framework 30, link to each other with control circuit, carrying out image under the control of control circuit shows, module backlight is arranged on the outside of liquid crystal panel 20, module backlight for straight-down negative, it specifically can comprise structures such as reflecting plate 41, optics cavity 42, light source 43 and optical film 44, and as shown in Figure 7, optical film 44 can comprise prismatic lens, diffusion sheet, light-collecting piece, increment film etc. according to concrete needs.In the present embodiment, light source 43 is a plurality of coloured pointolites, and the color of coloured pointolite comprises first color and second color at least.
In actual applications, also can adopt the module backlight of side-light type, the module backlight of side-light type can comprise the optical film between light guide plate, the light source that is arranged on the light guide plate side that is arranged on liquid crystal panel one side, the reflection side plate that is around in light guide plate and light source outside and reflected bottom plate and light guide plate and the liquid crystal panel etc. usually, forms side-light type back light by the light guide plate directing light.
Concrete, the color of coloured pointolite also comprises the 3rd color, and first color be green, and second color be a redness, and the 3rd color is a blueness.Coloured pointolite is specifically as follows LED, i.e. red LED, green LED and blue led.
In the present embodiment, the quantity of versicolor coloured pointolite can equate or not wait, and can make the final light that sees through liquid crystal panel satisfy the requirement of white point coordinate by adjusting the area of each sub-pixels on the liquid crystal panel.
LCD of the present invention can farthest be brought into play the luminous power of LED, improve light utilization efficiency, reaching under the situation of same brightness requirement, can reduce the quantity of LED or cut down the consumption of energy, thereby can reduce the cost of LCD, promote the popularization of LED as the LCD of backlight.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (12)
1. liquid crystal panel, comprise first substrate and second substrate that box is provided with, the corresponding a plurality of sub-pixels that are formed with the matrix form arrangement on the two substrates, each sub-pixel is the color film of corresponding a kind of color respectively, described color comprises first color and second color at least, it is characterized in that: the area of the described first color sub-pixel is greater than the area of the second color sub-pixel.
2. liquid crystal panel according to claim 1 is characterized in that: described color also comprises the 3rd color, and described first color is green, and second color be red, and the 3rd color is a blueness; The area of green sub-pixels is respectively greater than the area of red sub-pixel and the area of blue subpixels.
3. liquid crystal panel according to claim 2 is characterized in that: the area of red sub-pixel is greater than the area of blue subpixels.
4. according to claim 2 or 3 described liquid crystal panels, it is characterized in that: the quantity of every kind of color sub-pixel equates; The area of a green sub-pixels is respectively greater than the area of a red sub-pixel and the area of a blue subpixels.
5. liquid crystal panel according to claim 4 is characterized in that: a red sub-pixel, a green sub-pixels and a blue subpixels constitute a pixel; In each pixel, red sub-pixel, green sub-pixels and blue subpixels order and be set up in parallel.
6. liquid crystal panel according to claim 4 is characterized in that: a red sub-pixel, a green sub-pixels and a blue subpixels constitute a pixel; In each pixel, red sub-pixel and blue subpixels are set up in parallel, green sub-pixels on red sub-pixel one side concordant with blue subpixels in abutting connection with setting.
7. according to claim 2 or 3 described liquid crystal panels, it is characterized in that: the area of each sub-pixel all equates; The quantity of green sub-pixels is respectively more than the quantity of red sub-pixel and the quantity of blue subpixels.
8. liquid crystal panel according to claim 7 is characterized in that: a red sub-pixel, two green sub-pixels and a blue subpixels constitute a pixel; In each pixel, red sub-pixel, green sub-pixels and blue subpixels order and be set up in parallel or be matrix pattern and arrange and be provided with.
9. LCD that comprises the arbitrary described liquid crystal panel of claim 1～8, also comprise framework, control circuit and module backlight, described liquid crystal panel is embedded in described framework and links to each other with described control circuit, described module backlight is arranged on the outside of described liquid crystal panel, it is characterized in that: the light source that comprises in the described module backlight is a plurality of coloured pointolites, and the color of described coloured pointolite comprises first color and second color at least.
10. LCD according to claim 9 is characterized in that: the color of described coloured pointolite also comprises the 3rd color, and described first color is green, and second color be red, and the 3rd color is a blueness.
11. LCD according to claim 10 is characterized in that: the quantity of versicolor coloured pointolite equates or does not wait.
12. LCD according to claim 10 is characterized in that: described coloured pointolite is a light emitting diode.
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| CN2009100861122A CN101907800B (en) | 2009-06-02 | 2009-06-02 | Liquid crystal display panel and liquid crystal display |
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| CN2009100861122A CN101907800B (en) | 2009-06-02 | 2009-06-02 | Liquid crystal display panel and liquid crystal display |
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