CN105629577A - Backlight unit, display screen and display device - Google Patents
Backlight unit, display screen and display device Download PDFInfo
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- CN105629577A CN105629577A CN201610200696.1A CN201610200696A CN105629577A CN 105629577 A CN105629577 A CN 105629577A CN 201610200696 A CN201610200696 A CN 201610200696A CN 105629577 A CN105629577 A CN 105629577A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
Abstract
The embodiment of the invention discloses a backlight unit, a display screen and a display device. The backlight unit comprises a light source and a light guide plate, wherein the light source comprises a plurality of illuminating unit groups and at least one color cast compensation illuminating unit; each illuminating unit group comprises at least three basic illuminating units for emitting light rays of different colors; the light guide plate comprises at least one incident side; the illuminating unit groups and the color cast compensation illuminating units are opposite to the incident side; and the color cast compensation illuminating unit is arranged at the corner of the incident side. According to the technical scheme of the embodiment of the invention, the problem of color cast at the corner of the backlight unit is solved, and the image display quality is improved.
Description
Technical field
The embodiment of the present invention relates to technique of display field, particularly relates to a kind of back light unit and comprises display screen and the display unit of this back light unit.
Background technology
In the display unit of the non-autonomous luminescences such as liquid crystal indicator, usually by back light unit for display unit provides light, in the injection type backlight unit of side, general employing photodiode is as backlight, through the effect of light guiding plate, change the direction of incident light, convert side light source to light source towards display screen, via optical film transmission display screen, realize the image display function of indicating meter.
In back light unit, many the photodiode series connection or parallel connection that send different colours light can be adopted, and it is supplied to the stable electric current of each photodiode by corresponding control unit, so that each photodiode keeps stable brightness, maintain the normal display of various image.
But, incomplete owing to there is assorted light colour mixture at the two ends of back light unit and corner place, cause back light unit two ends and corner place colour mixture incomplete, namely there is the problem of colour cast at back light unit corner place.
Summary of the invention
The present invention provides a kind of back light unit, display screen and display unit, to overcome the colour cast problem at back light unit corner place, it is to increase image displaying quality.
The one side of the embodiment of the present invention provides a kind of back light unit, and described back light unit comprises:
Light source, described light source comprises multiple luminous unit groups and at least one colour cast compensates luminous unit; Each luminous unit group comprises the basic luminescence unit that at least three kinds send different colours light;
Light guiding plate, described light guiding plate comprises at least one incident side, and described luminous unit group and described colour cast compensate luminous unit and described incident side is oppositely arranged, and described colour cast compensates the corner place that luminous unit is arranged at described incident side.
The another aspect of the embodiment of the present invention also provides a kind of display screen, and described display screen comprises the back light unit described in any embodiment of the present invention.
The one side again of the embodiment of the present invention also provides a kind of display unit, and described display unit comprises the display screen described in any embodiment of the present invention.
Embodiments provide a kind of back light unit, back light unit comprises light source and light guiding plate, light source comprises multiple luminous unit groups and at least one colour cast compensates luminous unit, each luminous unit group comprises the basic luminescence unit that at least three kinds send different colours light, light guiding plate comprises at least one incident side, luminous unit group and colour cast compensate luminous unit and incident side is oppositely arranged, and colour cast compensates the corner place that luminous unit is arranged at light guiding plate incident side, overcome the colour cast problem at back light unit corner place, it is to increase image displaying quality.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of back light unit that the embodiment of the present invention provides;
Fig. 2 is the structural representation of the back light unit with a luminous unit of colour cast compensation that the embodiment of the present invention provides;
Fig. 3 is the structural representation of the back light unit with one group of luminous unit of colour cast compensation that the embodiment of the present invention provides;
Fig. 4 is the structure of backlight unit schematic diagram with the luminous unit of white colour cast compensation that the embodiment of the present invention provides;
Fig. 5 is the structural representation of the back light unit with the different row arrangement luminous unit of colour cast compensation that the embodiment of the present invention provides;
Fig. 6 is the structural representation that the non-corner place that the embodiment of the present invention provides arranges the back light unit of the luminous unit of colour cast compensation;
Fig. 7 is the structural representation that the non-corner place that the embodiment of the present invention provides arranges the back light unit of the white luminous unit of colour cast compensation;
Fig. 8 is the structural representation that another non-corner that the embodiment of the present invention provides arranges the back light unit of the white luminous unit of colour cast compensation;
Fig. 9 is the structural representation of a kind of back light unit with backlight control unit that the embodiment of the present invention provides;
Figure 10 is the structural representation of a kind of printed circuit board (PCB) that the embodiment of the present invention provides;
Figure 11 is the light path schematic diagram that a kind of light that the embodiment of the present invention provides enters light guiding plate;
Figure 12 is the schematic diagram of a kind of light guiding plate that the embodiment of the present invention provides;
Figure 13 is the schematic diagram of another kind of light guiding plate that the embodiment of the present invention provides;
Figure 14 is the functional relationship figure of each module of a kind of backlight control unit that the embodiment of the present invention provides;
Figure 15 is the schematic diagram of a kind of display screen that the embodiment of the present invention provides;
Figure 16 is the schematic diagram of a kind of array of sub-pixels that the embodiment of the present invention provides;
Figure 17 is the schematic diagram of another sub pixel array that the embodiment of the present invention provides;
Figure 18 is the functional relationship figure of the control unit of a kind of display screen that the embodiment of the present invention provides;
Figure 19 is the schematic diagram of a kind of display unit that the embodiment of the present invention provides.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail. It should be appreciated that specific embodiment described herein is only for explaining the present invention, but not limitation of the invention. It also should be noted that, for convenience of description, accompanying drawing illustrate only part related to the present invention and not all structure.
Fig. 1 is the structural representation of a kind of back light unit that the embodiment of the present invention provides, and with reference to figure 1, back light unit comprises: light source 11 and light guiding plate 12. Wherein, light source 11 comprises multiple luminous unit groups 110 and at least one colour cast compensates luminous unit 120, and each luminous unit group 110 comprises the basic luminescence unit 111 that at least three kinds send different colours light. Light guiding plate 12 comprises at least one incident side. The incident side that luminous unit group 110 and colour cast compensate luminous unit 120 and light guiding plate 12 is oppositely arranged, and colour cast compensates the corner place that luminous unit 120 is arranged at the incident side of light guiding plate 12. Compensating luminous unit 120 for intuitively representing colour cast in the drawings, with diagonal line hatches background, what the present embodiment was exemplary represents that colour cast compensates luminous unit 120, represent basic luminescence unit 111 with white background.
It should be noted that, basic luminescence unit 111 can comprise emitting red light unit R, green emitting unit G and blue-light-emitting unit B. Wherein, the arrangement mode of emitting red light unit R, green emitting unit G and blue-light-emitting unit B can have multiple situation, can by RGBRGBRGB as shown in Figure 1 ... mode arrange, can also by RBGRBGRBG ... RRBGRRBGRRBG ... arrange etc. mode, the arrangement mode of each basic luminescence unit 111, depending on concrete situation, does not do special restriction at this. In addition, in Fig. 1, in each luminous unit group 110, the number of basic luminescence unit 111 is 3, can also be multiple in other embodiments, also be not specifically limited at this. By arranging at the corner place of light guiding plate 12 incident side, at least one colour cast compensates luminous unit 120 to the present embodiment, overcome the colour cast problem at back light unit corner place, it is to increase image displaying quality.
With reference to figure 1, the colour cast that the corner place of light guiding plate 12 incident side is arranged compensates luminous unit 120 can be different from the glow color of the basic luminescence unit 111 of nearest neighbour. Concrete, two colour casts as shown in Figure 1 can be set at each corner place and compensate luminous unit 120, namely on the left of light guiding plate 12 incident side, corner place arranges the green emitting unit G different from emitting red light unit R glow color and blue-light-emitting unit B, and on the right side of light guiding plate 12 incident side, corner place arranges the emitting red light unit R different from blue-light-emitting unit B glow color and green emitting unit G.
In addition, 1 luminous compensating unit 120 can also be set at each corner place, Fig. 2 is the structural representation of the back light unit with a luminous unit of colour cast compensation that the embodiment of the present invention provides, with reference to figure 2, at corner, the left side place of light guiding plate 12 incident side, a blue-light-emitting unit B can be set, corner place, right side can arrange an emitting red light unit R, and the blue-light-emitting unit B at corner, the left side place of light guiding plate 12 incident side basic luminescence unit red with is adjacent, and color need not, the emitting red light unit R at corner, the right side place of light guiding plate 12 incident side basic luminescence unit blue with is adjacent, the two color is also different. luminous unit 120 is compensated, it is possible to be make light guiding plate 12 corner areas colour mixture complete, overcome colour cast problem, it is to increase image displaying quality by arranging colour cast at the corner place of light guiding plate 12 incident side.
Fig. 3 is the structural representation of the back light unit with one group of luminous unit of colour cast compensation that the present embodiment provides, with reference to figure 3, at least three kinds of colour casts sending different colours light can also be set at the corner place of light guiding plate 12 incident side and compensate luminous unit 120, and the glow color quantity of the luminous unit 120 of colour cast compensation at the corner place of this incident side is identical with the glow color quantity of luminous unit group 110. As shown in Figure 3, colour cast compensates luminous unit 120 and comprises emitting red light unit R, green emitting unit G and blue-light-emitting unit B, and glow color quantity is identical with the glow color quantity of luminous unit group 110. Compensate luminous unit 120 by arranging the colour cast identical with the glow color quantity of luminous unit group 110 at light guiding plate 12 incident side corner place, make light guiding plate 12 corner place colour mixture completely, overcome colour cast problem, it is to increase image displaying quality.
In addition, colour cast compensates the glow color of luminous unit 120 can also be white. With reference to figure 4, Fig. 4 is the structure of backlight unit schematic diagram with the luminous unit of white colour cast compensation that the present embodiment provides, white luminous unit W is set respectively at light source 11 left end and right-hand member and compensates luminous unit 120 as colour cast, make light guiding plate 12 corner place colour mixture complete, overcome colour cast problem, it is to increase image displaying quality.
In above-described embodiment, in the plane parallel with light guiding plate 12 incident side, colour cast compensates luminous unit 120 and is positioned at same a line with luminous unit group 110. In the present embodiment, in the plane parallel with light guiding plate 12 incident side, colour cast compensates luminous unit can also the arrangement of different row with luminous unit group 110. Fig. 5 is the structural representation of the back light unit with the different row arrangement luminous unit of colour cast compensation that the embodiment of the present invention provides, with reference to figure 5, it is white luminous unit W that colour cast compensates luminous unit 120, it is positioned at the plane parallel with incident side with luminous unit group 110, and colour cast compensates the lower section that luminous unit 120 is positioned at the luminous unit group 110 at incident side corner place, makes corner place colour mixture complete. Wherein, colour cast compensates luminous unit 120 can also be the luminous unit such as R, B, RG, GB or the RGB in above-described embodiment.
In above-described embodiment, colour cast compensates the corner place that luminous unit 120 is all positioned at light guiding plate 12 incident side, and in the present embodiment, colour cast compensates the non-corner place that luminous unit 120 can also be positioned at incident side.
Fig. 6 is the structural representation that the non-corner place that the embodiment of the present invention provides arranges the back light unit of the luminous unit of colour cast compensation, with reference to figure 6, in the plane parallel with incident side, colour cast compensates the row arrangement different from luminous unit group 110 of luminous unit 120, and with the luminous unit group 110 of a line sends the basic luminescence unit 111 of different colours light, and compensate luminous unit 120 according to default rule repeated arrangement with at least three kinds of a line colour casts sending different colours light, and the light color of different rows puts in order difference. Concrete, as shown in Figure 6, luminous unit 111 based on the first row of light source 11, wherein, in luminous unit group 110, basic luminescence unit presses RGBRGBRGB ... order arrangement, the first row and the 2nd behavior colour cast compensate luminous unit 120, respectively according to GBRGBRGBR ... and BRGBRGBRG ... order arrangement. Fig. 6 is only exemplary gives basic luminescence unit 111 and colour cast compensates the ordering of luminous unit 120, can also otherwise arrange in other embodiments, and be not specifically limited. By arranging, many row colour cast compensates luminous unit 120 to the present embodiment, overcome colour cast problem, and make the more units of backlight color, it is to increase image displaying quality and contrast gradient.
It should be noted that, in the plane parallel with incident side, the arrangement line number sum that colour cast compensates luminous unit 120 and luminous unit group 110 is greater than or equal to 2. Concrete line number can set according to the thickness of back light unit.
In addition, colour cast compensate luminous unit 120 for glow color be white time, colour cast compensation luminescence unit 120 can also be positioned at the non-corner place of light guiding plate 12 incident side. Concrete, it is possible to colour cast is set in the both sides of partly or entirely luminous unit group 110 and compensates luminous unit 120. Fig. 7 is the structural representation that the non-corner place that the embodiment of the present invention provides arranges the back light unit of the white luminous unit of colour cast compensation, with reference to figure 7, it is possible to all arranges white luminous unit W in each luminous unit group 110 both sides and compensates luminous unit 120 as colour cast. So not only overcoming the problem of corner place colour cast, all colour mixture is complete to also assures that each luminous unit group 110, it is to increase image displaying quality.
Concrete, when luminous unit 120 glow color of colour cast compensation is white, when arranging with the luminous different row of unit group 110, the luminous unit 120 of colour cast compensation can also be positioned at the non-corner place of incident side. Fig. 8 is the structural representation that another non-corner that the embodiment of the present invention provides arranges the back light unit of the white luminous unit of colour cast compensation, with reference to figure 8, it is possible to arrange one or more white luminous unit W in the lower section of one or more groups luminous unit group 110 at non-corner place and compensate luminous unit 120 as colour cast.
It should be noted that, the situation that light guiding plate has an incident side only exemplary in above-described embodiment is illustrated, in other embodiments, light guiding plate can also have multiple incident side, it is possible to arranges colour cast in each incident side in the manner described above and compensates luminous unit.
In the above-described embodiments, light guiding plate 12 can comprise N number of predeterminable area, and the light that light source 11 sends is propagated in reducing-pitch thread in each predeterminable area, and N is positive integer, and N >=1, backlight control unit obtains the view data signal corresponding to N number of predeterminable area, by view data signal corresponding for each predeterminable area by calculating colourity and the brightness information of each predeterminable area correspondence image, and to compensate luminous unit according to the luminous unit group of the colourity of each predeterminable area correspondence image and brightness information Control and colour cast be that each predeterminable area provides light. Fig. 9 is the structural representation of a kind of back light unit with backlight control unit that the embodiment of the present invention provides, with reference to figure 9, light guiding plate 12 comprises and is divided into N number of predeterminable area, backlight control unit 130 draws colourity and the brightness information of each predeterminable area corresponding image by analytical calculation, and show that control enters the width modulation (PWM of each basic luminescence unit 111 emitted light of each predeterminable area according to colourity and brightness information, PulseWidthModulation) signal, control basic luminescence unit 111 according to this pwm signal and send required light, because each basic luminescence unit institute energy requirement is modulated by pwm signal, make the energy of light source 11 can properly distributed, thus reduce the overall power of back light unit, as when the colourity corresponding to a certain predeterminable area with in brightness information, red component is X1%, green component is X2%, when blue component is X3%, can according to X1, X2, ratio between X3 is determined to be supplied to emitting red light unit respectively, the current value of green emitting unit and blue-light-emitting unit, such that it is able to avoid unnecessary energy waste. especially, when carrying out monochromatic display, only it is required to be and provides the corresponding basic luminescence unit 111 of shown color to provide electric current, and each basic luminescence unit 111 providing other colors can be closed, thus greatly reduce the power consumption of back light unit. in addition, light is propagated in reducing-pitch thread in each predeterminable area so that while the energy of backlight reduces further, improve the contrast gradient of display frame. in addition, the only exemplary subregion situation illustrating light guiding plate 12 correspondence when display panel is divided into N number of rectangular region being arranged side by side in Fig. 9, in other embodiments, it is also possible to be divided into the region of N number of arranged, be not specifically limited at this.
The predeterminable area A1 of light guiding plate 12, A2 ... in AN, each predeterminable area unit 111 luminous with several is relative, basic luminescence unit 111 shown in Fig. 9 is only schematic example, the quantity of the basic luminescence unit 111 corresponding to each predeterminable area, depending on particular case, does not do special restriction at this.
With continued reference to Fig. 9, it should be noted that, in the present embodiment, corresponding to, in the basic luminescence unit 111 of same predeterminable area, having and be one another in series between the basic luminescence unit 111 of same color, namely emitting red light unit is connected mutually, green emitting unit is connected mutually, and blue-light-emitting unit connects mutually, and separate between basic luminescence unit 111 corresponding to different predeterminable area, such that it is able to avoid mutually disturbing between different predeterminable area.
Further, the spacing that luminous unit group 110 in the various embodiments described above and colour cast compensate in luminous unit 120 between adjacent two luminous unit is 0.01mm-4mm, when researchist is 0.01mm-4mm by the spacing that test of many times draws between two luminous unit, after the light that luminous unit corresponding to each predeterminable area sends enters corresponding predeterminable area, light can mix, it is provided that preferably display effect. When between two luminous unit, spacing is greater than 4mm, because the distance between luminous unit is too big, and in the present embodiment, light is propagated in reducing-pitch thread in light guiding plate, make light that each luminous unit sends in predeterminable area cannot Homogeneous phase mixing, and then make luminous unit cannot be that predeterminable area provides required light according to the colourity of predeterminable area corresponding image and brightness information. In the present embodiment, studying discovery further, when the spacing between luminous unit is 0.3mm-1.5mm, the light of each luminous unit can present best admixture in corresponding predeterminable area, thus provides better display effect.
It should be noted that, in some optional enforcement modes of the present embodiment, luminous unit group 110 and the luminous unit 120 of colour cast compensation in the various embodiments described above can be light-emitting diode chip for backlight unit, and namely the luminous unit of R, G, B shown in figure is respectively red light emitting diodes chip, green LED chip and blue led chips. Wherein, optionally, each light-emitting diode chip for backlight unit is preferably dimensioned to be 100um-300um. Because the size of light-emitting diode chip for backlight unit is less, a predeterminable area of light guiding plate 12 may correspond to multiple light-emitting diode chip for backlight unit, so that the distribution of light entering predeterminable area is even, it is provided that more accurate picture display.
In some other optional enforcement modes of the present embodiment, it can also be nano-wire LED unit that luminous unit group 110 and colour cast compensate luminous unit 120, i.e. R, G, the luminous unit of B is respectively red nano line light emitting diode, Preen nono line light emitting diode and blue nano-wire LED unit, wherein, optionally, nano-wire LED unit is of a size of 5um-30um, nano-wire LED unit is be formed in substrate to be of a size of nano level photodiode array, substrate can be silicon chip or other materials, special restriction is not done at this. after being formed in substrate, nano-wire LED unit is transferred to light source place again, as luminous unit. because the size of nano-wire LED unit is minimum, it can make the corresponding multiple nano-wire LED unit of a predeterminable area of light guiding plate as luminous unit, so that the distribution of light entering predeterminable area is even, it is provided that more accurate picture display.
In some other optional enforcement modes of the present embodiment, it can also be light emitting diode with quantum dots unit that luminous unit group 110 and colour cast compensate luminous unit 120, i.e. R, G, the luminous unit of B is respectively red light emitting diode with quantum dots unit, green light emitting diode with quantum dots unit and blue light emitting diode with quantum dots unit, because the luminescent material of light emitting diode with quantum dots unit is nanocrystal, so the size of light emitting diode with quantum dots unit can be Nano grade, a predeterminable area of light guiding plate 12 is made to may correspond to multiple light emitting diode with quantum dots unit, so that the distribution of light entering predeterminable area is even, more accurate picture display is provided.
Further, in the present embodiment, back light unit also comprises printed circuit board (PCB), with reference to Figure 10, Figure 10 is the structural representation of a kind of printed circuit board (PCB) that the embodiment of the present invention provides, wherein, luminous unit group 110 and colour cast compensate luminous unit 120 and are integrated on printed circuit board (PCB) 140, and carry out overall package by packaged material 150. Packaged material 150 is transparent material, it is possible to being the transparent glue-line that silica gel, silicone adhesive and epoxy resin etc. are formed, this is not done special restriction by the present embodiment. The specific refractory power getting packaged material 150 is n1, and the specific refractory power of light guiding plate is n2, then-5%��(n1-n2)/n2��5%, and namely packaged material 150 is equal with the specific refractory power of light guiding plate 12 or approximately equal.
Figure 11 is the light path schematic diagram that a kind of light that the embodiment of the present invention provides enters light guiding plate, with reference to Figure 11, wherein, arrow show the propagation direction of light, when the specific refractory power n1 of packaged material 150 is equal with the specific refractory power n2 of light guiding plate 12 or during approximately equal, calculation formula according to specific refractory power, n1/n2=sin �� 2/sin �� 1, then �� 1 �� �� 2, namely after light enters light guiding plate 12 by packaged material 150, there is not considerable change in its propagation direction, thus light can be made from luminous unit injection, when packaged material 150 enters light guiding plate 12, the total internal reflection of the interface between packaged material 150 and the light-entering surface of light guiding plate 12 reduces even to be eliminated, make light that luminous unit sends all or close to all entering light guiding plate 12, reduce the loss of light.
With reference to the schematic diagram that Figure 12, Figure 12 are a kind of light guiding plates that the embodiment of the present invention provides, wherein, light guiding plate 12 comprises the first incident side 121, and the two side faces 122 relative with the first incident side. N number of predeterminable area A1 of light guiding plate, A2, AN extends to two side faces 122 by the first incident side 121, and the light that luminous unit group sends enters N number of predeterminable area A1 by the first incident side 121, A2, in AN, figure, arrow schematically shows the radiation direction entering the first incident side 121.
In addition, light guiding plate can also have the 2nd incident side 123, with reference to Figure 13, Figure 13 is the schematic diagram of another kind of light guiding plate that the embodiment of the present invention provides, wherein, light guiding plate 12 comprises the first incident side 121, and two incident side 123 relative with the first incident side 121, N number of predeterminable area comprises the first predeterminable area 101 and the 2nd predeterminable area 102, the one group of predeterminable area extending to light guiding plate 12 inside by the first incident side 121 is the first predeterminable area 101, the one group of predeterminable area extending to light guiding plate 12 inside by the 2nd incident side 123 is the 2nd predeterminable area 102, first predeterminable area 101 comprises predeterminable area A1, A2, Am, 2nd predeterminable area 102 comprises predeterminable area Am+1, AN, wherein, m is positive integer, and 1��m��N. the light that luminous unit group and the luminous unit of polarisation compensation send enters each first predeterminable area 101 by the first incident side 121, the light that luminous unit group and the luminous unit of polarisation compensation send enters arrow in each 2nd predeterminable area 102, figure by the 2nd incident side 123 and is respectively the direction of the light entering the first incident side 121 and the 2nd incident side 123. especially, as shown in figure 13, each first predeterminable area 101 is extended to the middle part of light guiding plate 12 by the first incident side 121, and each 2nd predeterminable area 102 is extended to the middle part of light guiding plate 12 by the 2nd incident side 123, and the middle part of light guiding plate 12 is as shown in phantom in FIG..
Said structure makes the luminous unit group relative with light guiding plate first incident side 121 and colour cast compensate luminous unit for the first predeterminable area 101 and provides light, the luminous unit group relative with light guiding plate the 2nd incident side 123 and colour cast compensate luminous unit for the 2nd predeterminable area 102 provides light, the distribution of light of each predeterminable area is even, avoid the situation that light propagation distance crosses length and produce light losing, it is provided that preferably display effect.
Further, with reference to figure 9, back light unit comprises backlight control unit 130, and backlight control unit 130 comprises graphic information receiver module, image information analysis module and luminous unit control module. Above-mentioned each module achieves backlight control unit jointly to the control of the N number of predeterminable area of light guiding plate, and the function of each module and connection relation each other are as shown in figure 14. Figure 14 is the functional relationship figure of each module of a kind of backlight control unit that the embodiment of the present invention provides, and wherein, graphic information receiver module receives and is transferred to view data signal corresponding to each predeterminable area of back light unit by the integrated circuit related with same in display screen. Sub image signal analyses module by view data signal corresponding for each predeterminable area by calculating colourity and the brightness information of each predeterminable area corresponding image, wherein, colourity and brightness information are the brightness information of the redness of each predeterminable area correspondence image, green and the component shared by shades of colour such as blue and shades of colour. After the colourity obtaining each predeterminable area correspondence image and brightness information, according to colourity and brightness information, luminous unit control module show that control enters the pwm signal of the various luminous unit emitted light of each predeterminable area, and send required light according to the luminous unit of this pwm signal control. As previously described, when in the colourity and brightness information of a certain predeterminable area corresponding image, red component is X1%, green component is X2%, when blue component is X3%, can according to X1, X2, ratio between X3 draws the pwm signal of control emitting red light unit, green emitting unit and blue-light-emitting unit emitted light, the different current value being supplied to emitting red light unit, green emitting unit and blue-light-emitting unit according to this pwm signal, such that it is able to avoid unnecessary energy waste.
The another aspect of the embodiment of the present invention provides a kind of display screen, comprises the back light unit in above-mentioned any enforcement mode.
With reference to the schematic diagram that Figure 15, Figure 15 are a kind of display screens that the embodiment of the present invention provides, wherein, display screen 100 comprises the back light unit in above-mentioned any enforcement mode. In addition, display screen 100 also comprises array of sub-pixels, array of sub-pixels comprises the sub-pixel in array distribution, as shown in figure 16, Figure 16 is the schematic diagram of a kind of array of sub-pixels that the embodiment of the present invention provides, wherein, sub-pixel 210 can be red sub-pixel R1, green sub-pixels G1 and blue subpixels B1 tri-sub pixel, and above-mentioned three sub pixels are the staggered repeated arrangement of array.
In addition, above-mentioned array of sub-pixels can also comprise white sub-pixels, and as shown in figure 17, Figure 17 is the schematic diagram of another sub pixel array that the embodiment of the present invention provides. wherein, sub-pixel 210 can be red sub-pixel R1, green sub-pixels G1, blue subpixels B1 and white sub-pixels W tetra-sub pixel, and above-mentioned four sub pixels are the staggered repeated arrangement of array. now, with reference to Figure 18, Figure 18 is the functional relationship figure of the control unit of a kind of display screen that the embodiment of the present invention provides, wherein, when comprising white sub-pixels in the array of sub-pixels of above-mentioned display screen, display screen also comprises white algorithm control unit, white algorithm control unit is according to the white color component of view data signal corresponding to each predeterminable area by calculating in Image Chroma Information corresponding to each predeterminable area, and the pwm signal of each luminous unit emitted light of control is drawn according to white color component, and then control each luminous unit for each predeterminable area offer light.
Further, as shown in figure 18, the above-mentioned R1 of comprising, G1 and B1 tri-sub pixel and comprise R1, G1, B1 and W tetra-sub pixel display screen in, also comprise gamma and regulate unit, gamma regulates unit to regulate the gamma curve of display screen display image, the distortion phenomenon of removal of images, it is provided that show image accurately.
The one side again of the embodiment of the present invention provides a kind of display unit, comprises the display screen in above-mentioned any enforcement mode.
With reference to the schematic diagram that Figure 19, Figure 19 are a kind of display unit that the embodiment of the present invention provides, wherein, display unit 200 comprises in above-mentioned any enforcement mode the display screen 100 described.
By foregoing description, back light unit, display screen and the display unit that the embodiment of the present invention provides, compensate luminous unit by arranging colour cast in light guiding plate incident side, overcome the colour cast problem not exclusively brought due to light source two ends colour mixture, it is to increase image displaying quality.
Note, above are only the better embodiment of the present invention and institute's application technology principle. It is understood by those skilled in the art that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and protection scope of the present invention can not be departed from. Therefore, although being described in further detail invention has been by above embodiment, but the present invention is not limited only to above embodiment, when not departing from present inventive concept, other equivalence embodiments more can also be comprised, and the scope of the present invention is determined by appended right.
Claims (18)
1. a back light unit, it is characterised in that, comprising:
Light source, described light source comprises multiple luminous unit groups and at least one colour cast compensates luminous unit; Each luminous unit group comprises the basic luminescence unit that at least three kinds send different colours light;
Light guiding plate, described light guiding plate comprises at least one incident side, and described luminous unit group and described colour cast compensate luminous unit and described incident side is oppositely arranged, and described colour cast compensates the corner place that luminous unit is arranged at described incident side.
2. back light unit according to claim 1, it is characterised in that, it is different from the glow color of the described basic luminescence unit of nearest neighbour that the colour cast that the corner place of described incident side is arranged compensates luminous unit.
3. back light unit according to claim 1, it is characterized in that, the corner place of described incident side is provided with at least three kinds of colour casts sending different colours light and compensates luminous unit, and the glow color quantity of the luminous unit of described colour cast compensation at the corner place of described incident side is identical with the glow color quantity of described luminous unit group.
4. back light unit according to claim 1, it is characterised in that, it is white that described colour cast compensates luminous unit glow color.
5. according to described back light unit arbitrary in claim 1-4, it is characterised in that, in the plane parallel with described incident side, described colour cast compensates luminous unit and described luminous unit group is positioned at same a line.
6. according to described back light unit arbitrary in claim 1-4, it is characterised in that, in the plane parallel with described incident side, described colour cast compensates luminous unit and the different row arrangement of described luminous unit group.
7. back light unit according to claim 3, it is characterised in that, described colour cast compensates the non-corner place that luminous unit is also positioned at described incident side;
In the plane parallel with described incident side, described colour cast compensates luminous unit and the different row arrangement of described luminous unit group;
With the basic luminescence unit sending different colours light in the described luminous unit group of a line, and compensate luminous unit according to default rule repeated arrangement with described in a line at least three kinds colour casts sending different colours light, and the light color of different rows puts in order difference.
8. back light unit according to claim 7, it is characterised in that, in the plane parallel with described incident side, the arrangement line number sum that described colour cast compensates luminous unit and described luminous unit group is greater than or equal to 2.
9. back light unit according to claim 5, it is characterised in that, described colour cast compensates luminous unit when be glow color being white, and described colour cast compensates the non-corner place that luminous unit is also positioned at described incident side.
10. back light unit according to claim 9, it is characterised in that, luminous unit group both sides described in each are provided with described colour cast and compensate luminous unit.
11. back light units according to claim 6, it is characterised in that, when the luminous unit glow color of described colour cast compensation is white, described colour cast compensates the non-corner place that luminous unit is also positioned at described incident side.
12. back light units according to claim 1, it is characterised in that, described light guiding plate comprises N number of predeterminable area, and the light that described light source sends is propagated in reducing-pitch thread in each described predeterminable area, and N is positive integer, and N >=1;
Backlight control unit, described backlight control unit obtains the view data signal corresponding to described N number of predeterminable area, by view data signal corresponding for each described predeterminable area by calculating colourity and the brightness information of each described predeterminable area correspondence image, and luminous unit group and described colour cast according to the colourity of each described predeterminable area correspondence image and brightness information Control compensates luminous unit is that each described predeterminable area provides light.
13. back light units according to claim 1, it is characterised in that, described back light unit also comprises printed circuit board (PCB), and described luminous unit group and described colour cast compensate luminous collection of units and be formed on described printed circuit board (PCB), and carry out overall package by packaged material.
14. back light units according to claim 1, it is characterized in that, described light guiding plate comprises the first incident side, and the two side faces relative with described first incident side, described N number of predeterminable area extends to described two side faces by described first incident side, and the light of described luminous unit group and the luminous unit of described colour cast compensation enters described N number of predeterminable area by described first incident side.
15. back light units according to claim 1, it is characterized in that, described light guiding plate comprises the first incident side, and two incident side relative with described first incident side, described N number of predeterminable area comprises the first predeterminable area and the 2nd predeterminable area, it is inner that described first predeterminable area extends to described light guiding plate by described first incident side, it is inner that described 2nd predeterminable area extends to described light guiding plate by described 2nd incident side, and the light of described luminous unit group and the luminous unit of described colour cast compensation enters described first predeterminable area by described first incident side, the light that described luminous unit group and described colour cast compensate luminous unit enters described 2nd predeterminable area by described 2nd incident side.
16. back light units according to claim 1, it is characterised in that, described backlight control unit comprises:
Image signal receiving receives module, and described image signal receiving is received module and received view data signal corresponding to described predeterminable area;
Sub image signal analysis module, described sub image signal analyses module by view data signal corresponding for described predeterminable area by calculating colourity and the brightness information of described predeterminable area correspondence image;
Luminous unit control module, described luminous unit control module provides signal according to described colourity and brightness information for described luminous unit group and described colour cast compensate luminescence unit, makes described luminous unit group and described colour cast compensate luminous unit for described predeterminable area offer light.
17. 1 kinds of display screens, it is characterised in that, described display screen comprises the back light unit described in claim 1-16 any one.
18. 1 kinds of display unit, it is characterised in that, described display unit comprises display screen according to claim 17.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610200696.1A CN105629577B (en) | 2016-03-31 | 2016-03-31 | Back light unit, display screen and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610200696.1A CN105629577B (en) | 2016-03-31 | 2016-03-31 | Back light unit, display screen and display device |
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