WO2018113612A1 - 液晶显示器件 - Google Patents

液晶显示器件 Download PDF

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Publication number
WO2018113612A1
WO2018113612A1 PCT/CN2017/116708 CN2017116708W WO2018113612A1 WO 2018113612 A1 WO2018113612 A1 WO 2018113612A1 CN 2017116708 W CN2017116708 W CN 2017116708W WO 2018113612 A1 WO2018113612 A1 WO 2018113612A1
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Prior art keywords
light
grayscale value
liquid crystal
crystal display
sets
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PCT/CN2017/116708
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English (en)
French (fr)
Inventor
陈猷仁
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惠科股份有限公司
重庆惠科金渝光电科技有限公司
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Priority to US16/471,714 priority Critical patent/US10923053B2/en
Publication of WO2018113612A1 publication Critical patent/WO2018113612A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3666—Control of matrices with row and column drivers using an active matrix with the matrix divided into sections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G09G5/06—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed using colour palettes, e.g. look-up tables
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/028—Improving the quality of display appearance by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present application relates to the field of liquid crystal display technology, and in particular to a liquid crystal display device.
  • Typical large-size liquid crystal display devices mostly use negative VA liquid crystal or IPS liquid crystal technology.
  • the VA type liquid crystal drive rapidly saturates the driving voltage with a large viewing angle, which leads to a serious visual role, which in turn affects the image quality. Since the brightness of the blue sub-pixels of the side view increases with the gray level, the trend of brightness saturation is more significant and faster than that of the red sub-pixels and the green sub-pixels, so that the mixed-color viewing angle will have a significant defect of blue-bias.
  • a liquid crystal display device comprising a backlight member, comprising a light guide plate, a light source, a fluorescent film, a reflection sheet, a light compensation layer and a light absorbing layer
  • the light guide plate comprises a light incident surface, a bottom surface, a light exit surface and a side surface, and the light output
  • the light incident surface is opposite to the bottom surface, and is opposite to the side surface and is respectively connected between the light emitting surface and the bottom surface
  • the light source is adjacent to the light incident surface for generating the first a wavelength light and a second wavelength light
  • the fluorescent film is located on the light emitting surface side
  • the reflective sheet includes a first reflective sheet and a second reflective sheet, the first reflective sheet is located on the bottom surface side, and the second a reflective sheet is located on the side of the side surface
  • the light compensation layer is located on the first reflective sheet and adjacent to the side surface
  • the light absorbing layer is located on a side of the second reflective sheet near the side surface
  • the liquid crystal display panel a pixel
  • the acquiring unit is configured to perform, by using a grayscale value lookup table, to obtain a corresponding two sets of target grayscale value pairs according to the average grayscale value; each of the grayscale value lookup tables A grayscale value corresponds to two sets of target grayscale value pairs.
  • control component further includes a determining unit; the determining unit is configured to determine a grayscale range to which an average grayscale value of the blue subpixel in each pixel group belongs; the acquiring unit is configured to: Obtaining a corresponding grayscale value lookup table according to the grayscale range in each pixel group, and obtaining corresponding two by using a corresponding grayscale value lookup table according to an average grayscale value of the blue subpixel in each pixel group. Group target grayscale value pairs.
  • a storage component is further included; the storage component is configured to store the grayscale value lookup table.
  • the driving component controls the driving voltages of the adjacent two blue sub-pixels to be one high and one low when driving the blue sub-pixels on the corresponding pixel groups according to the two sets of driving voltage pairs.
  • the light absorbing layer material is a red light absorbing material, or a red light and blue light absorbing material.
  • the light absorbing layer material comprises one or more of an anthraquinone dye, a flower enamel pigment, and a diimine pigment.
  • the light compensation layer is in the shape of a dot, and the volume and density of the light compensation layer are reduced in a direction pointing to the side of the light incident surface along the side of the light guide plate.
  • the light compensation layer material is a green quantum dot material or a green phosphor.
  • the light source is an LED light source, the LED light source comprising a blue chip and a red phosphor.
  • the red phosphor includes one or more of a nitride phosphor, a fluoride phosphor, and a sulfide phosphor.
  • the fluorescent film material is a green phosphor or a green quantum dot material.
  • FIG. 1 is a flow chart showing a driving method of a liquid crystal display panel in an embodiment
  • FIG. 2 is a schematic diagram of pixel division after performing S110 in FIG. 1;
  • FIG. 4 is a comparison diagram of brightness versus gray scale curve of a blue sub-pixel at a positive viewing angle and a side viewing angle when driving with a single driving voltage
  • FIG. 5 is a graph showing brightness as a gray scale change of a blue sub-pixel at a side viewing angle when driving with a high driving voltage, a low driving voltage, and a high driving voltage;
  • FIG. 6 is a schematic diagram of driving after executing S150
  • Figure 7 is a comparison of the brightness of the ideal brightness with the gray scale and the brightness of each of the two voltage combinations as a function of the gray scale;
  • FIG. 8 and 9 are partial enlarged views of Fig. 7;
  • Figure 10 is a block diagram showing the structure of a liquid crystal display device in an embodiment
  • Figure 11 is a block diagram showing the structure of a control unit in an embodiment
  • Figure 12 is a schematic view showing the structure of a backlight unit in an embodiment.
  • the driving method of the liquid crystal display panel can improve the color shift (or chromatic aberration) defect caused by the refractive index mismatch of the liquid crystal large viewing angle. In particular, it is possible to effectively improve the defect that the blue sub-pixel of the large viewing angle is prematurely saturated to cause color shift.
  • the liquid crystal display panel may be a TN, OCB, VA type liquid crystal display panel or a curved liquid crystal display panel, but is not limited thereto.
  • the driving method includes the following steps:
  • each pixel group After division, each pixel group includes an even number of pixels arranged in a matrix.
  • each pixel group 90 includes four pixels arranged in a matrix, as shown in FIG.
  • Each of the pixels 92 includes a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B, that is, each pixel group 90 includes four blue sub-pixels arranged in a matrix.
  • the number of pixels included in each pixel group can be set as needed.
  • S120 Determine an average grayscale value of the blue sub-pixel in each sub-pixel according to the picture input signal.
  • the gray scale value of each blue sub-pixel is represented by B i,j .
  • B represents blue
  • (i, j) represents the sequential number of the blue sub-pixels in the entire liquid crystal display panel.
  • the average grayscale value B'n of the blue subpixels in each sub-pixel group is calculated as follows:
  • B'n Average(B i,j +B i+1,j +B i,j+1 +B i+1,j+1 ).
  • Each set of target grayscale value pairs includes a high and low grayscale value.
  • the gray level value of the high level and the low level needs to satisfy the same positive viewing angle brightness of the mixed gray level value B'n.
  • the high viewing angle brightness corresponding to the high and low gray scale values is as close as possible to the positive viewing angle brightness of the average gray scale value.
  • the difference between the gray level value of the high-low level of the target gray-scale value pair needs to be greater than the preset difference range, thereby ensuring two gray levels in the target gray-scale value pair.
  • the value has a large grayscale difference.
  • the two sets of target grayscale value pairs have different visual role partial improvement ranges, wherein the visual role partial improvement range of one group is lower than the visual role partial improvement range of the other set, that is, one set can have a large viewing angle for high grayscale values.
  • the color shift has a better improvement effect, and the other group can better improve the color shift of the low gray scale value large viewing angle.
  • the high grayscale value is relative to the low grayscale value of the other group.
  • a large viewing angle can be defined as greater than 60° or customized according to the user.
  • the acquisition of the target grayscale value pairs can be performed by finding a grayscale value lookup table (LUT). Specifically, each grayscale value in the grayscale value lookup table corresponds to two sets of target grayscale value pairs.
  • the grayscale value lookup table in one embodiment is shown in the following table:
  • the above grayscale value lookup table is only an example and does not constitute a limitation on a specific grayscale value lookup table.
  • the color-offset improvement range of the two sets of target gray-scale value pairs in each gray-scale value lookup table does not overlap as much as possible, thereby ensuring the brightness of the blue sub-pixel from the gray-scale value from the low grayscale value to the high grayscale value.
  • the change can be close to the positive viewing angle effect, effectively improving the defect of the color shift caused by the premature saturation of the blue sub-pixel of the large viewing angle.
  • the grayscale value lookup table can be pre-stored in the storage component. Therefore, the corresponding two sets of target grayscale value pairs can be obtained according to the average grayscale value.
  • the acquisition process of the target grayscale value pair includes the following steps, as shown in FIG.
  • the grayscale value of the blue subpixel is pre-defined into a preset grayscale range, such as 0-50, 51-101, 102-152, 153-203, and 204 to 255. It can be understood that the division of the gray scale range can be divided according to actual needs, and is not limited thereto. Each gray scale range can be determined based on the degree of improvement in the desired color shift. Different grayscale range divisions are also pre-stored in the storage component so that the acquisition can be directly found.
  • grayscale ranges have different effects on the visual role bias, so different grayscale ranges correspond to different grayscale value lookup tables, so that corresponding grayscale values can pass target grayscales more suitable for the grayscale range.
  • the target gray scale value pair is driven by the driving voltage, that is, by a more suitable driving voltage, thereby ensuring that the brightness of the adjusted blue sub-pixel in the side view is closer to the front view with the gray scale change.
  • the curve of change The correspondence table between the grayscale value range and the grayscale value lookup table may be stored in the storage component in advance, so that the corresponding driving voltage can be determined according to the obtained grayscale range.
  • the grayscale value lookup table LUT1 is used, as shown in the following table:
  • the grayscale value lookup table LUT2 is used, as shown in the following table:
  • the above is only a specific example, and the range division of the grayscale value lookup table and the respective grayscale value lookup tables are not limited to the implementations defined in the above embodiments.
  • the corresponding two sets of target grayscale value pairs can be obtained by looking up the table.
  • the corresponding driving voltage can be obtained according to the grayscale value. Therefore, the corresponding two sets of driving voltages (B n'_H1 and B n'_L1 , B n'_H2 and B n'_L2 ) can be determined according to the two sets of target gray scale value pairs.
  • the drive voltage pair can be obtained by the drive voltage lookup table.
  • the driving voltage lookup table is a correspondence table of the color grayscale value and the driving voltage in the input signal of the blue sub-pixel. Specifically, each grayscale value of the blue sub-pixel corresponds to one driving voltage signal.
  • Each set of high and low driving voltage pairs can make the brightness of the adjusted blue sub-pixels in the side view closer to the brightness in the front view as the gray level curve.
  • the brightness variation of the blue sub-pixels in the side view can be controlled, so that the saturation trend of the blue sub-pixels is close to the red sub-pixels and the blue sub-pixels or the same
  • the brightness saturation curves of the lower red sub-pixel, the green sub-pixel, and the blue sub-pixel are close to each other to reduce the defect of the apparent role.
  • FIG. 4 is a graph showing the luminance as a grayscale value in a front view and a side viewing angle when a blue subpixel adopts a single driving voltage, wherein L71 represents a curve in front view and L72 represents a curve in side view. Obviously, in the side view, its brightness will easily approach saturation with the gray-scale value curve, so that the mixed-color viewing angle will show obvious defects of blue-bias.
  • FIG. 5 is a schematic diagram showing the comparison of the brightness variation curves at the side angles of driving with high and low driving voltages and driving with high voltage and low voltage driving.
  • L81 is the gray-scale curve seen from the side angle of view when driving with high voltage
  • L82 is the curve of the brightness of the low-drive voltage seen with the side view
  • L83 is mixed with L81 and L82. That is to say, the brightness of the high-low driving voltage is changed with the gray-scale curve. It is obviously closer to the brightness under the front view with the gray-scale curve L84, that is, the high-low driving voltage pair can improve the visual role.
  • each of the pixel groups has a driving voltage pair capable of improving the color shift of the high grayscale value large viewing angle and a driving voltage pair capable of improving the color shift of the low grayscale value large viewing angle, thereby making the low grayscale value
  • the high gray scale value, the brightness of the blue sub-pixel can be close to the positive viewing angle effect with the change of the gray scale value, and effectively improves the defect of the color shift caused by the premature saturation of the blue sub-pixel of the large viewing angle.
  • two sets of driving voltage pairs (B n'_H1 and B n'_L1 , B n'_H2 and B n'_L2 ) are separately driven to the blue sub-pixels on the corresponding pixel group, so that The driving voltages of two adjacent blue sub-pixels are one high and one low, thereby improving the visual character deviation defect by high-low voltage phase-to-phase driving, as shown in FIG. 6.
  • two sets of target grayscale value pairs are obtained according to an average grayscale value of each pixel group on the liquid crystal display panel.
  • Each set of target grayscale value pairs includes a high-low-low grayscale value, and the mixed positive-angle brightness of the two is the same as the positive-angle brightness of the average grayscale value, so that the brightness is not affected.
  • the corresponding two sets of driving voltage pairs are obtained, so that there are two sets of driving voltage pairs in the pixel group with improved visual role bias. Since different driving voltages have different effects on the effect of different grayscale value ranges, so that the luminance of the blue sub-pixels can be changed from the grayscale value to the high grayscale value after mixing.
  • the pixels on the liquid crystal display panel need not be designed as primary and secondary pixels, thereby greatly improving the transmittance and resolution of the TFT display panel, and reducing the backlight design cost.
  • Target gamma is a curve of the luminance of the target blue sub-pixel as a grayscale value, corresponding to L61 in FIG.
  • the spatial subdivision through the blue sub-pixel must be satisfied that the RGB luminance ratio does not change.
  • the high-voltage and low-voltage combination of the blue sub-pixel spatial division gamma1 and gamma2 are saturated with the voltage, and correspond to L62 and L63 in FIG. 7, respectively.
  • FIG. 8 and 9 are partial enlarged views of Fig. 7. It can be seen from FIG. 7 to FIG. 9 that the blue sub-pixels on the display panel are driven by a set of high and low voltages, and the brightness of the grayscale conversion curve is much faster than that of the target gamma.
  • the side view role bias problem cannot be solved very well. That is, the high voltage and low voltage combination of only one blue sub-pixel spatial division cannot simultaneously satisfy the requirement that the high and low voltage luminances are close to the target luminance.
  • the difference d1(n) between the actual brightness of the gamma1 and the target brightness is much larger than the difference between the actual brightness of the gamma2 and the target brightness d2. (n).
  • the difference d1(n) between the actual brightness of the gamma1 and the target brightness is much smaller than the difference d2(n) between the actual brightness of the gamma2 and the target brightness.
  • each pixel group includes a driving voltage pair suitable for a high grayscale value and a driving voltage pair suitable for a low grayscale value, thereby causing a change in viewing angle brightness generated by combining the two driving voltage pairs.
  • the curve combines the advantages of both, which in turn makes the viewing angle curve closer to the target value, and the curve changes smoothly, without the phenomenon that the image quality is abrupt or the color mixing is abnormal.
  • the gamma3 (corresponding to L64 in FIGS. 7 to 9) in FIGS. 7 to 9 is a viewing angle luminance curve generated by using a combination of high and low voltages such as gamma1 plus gamma2. Obviously, the difference d3(n) between the actual brightness of gamma3 and the target brightness is always between d1(n) and d2(n), that is, the change is closer to the target value requirement, which can effectively improve the visual role bias problem.
  • the present application also provides a liquid crystal display device as shown in FIG.
  • the liquid crystal display device can perform the above driving method.
  • the liquid crystal display device includes a backlight member 310, a liquid crystal display panel 320, a control member 330, and a driving member 340.
  • the control component 330 and the driving component 340 can be integrated on the liquid crystal display panel 310, and the backlight component 310 can be directly implemented by using a backlight module. It will be understood that the manner in which the components are integrated is not limited thereto.
  • the backlight unit 310 is for providing a backlight.
  • the backlight unit 310 can be a direct type backlight or a side-in type backlight.
  • a side-lit backlight unit is taken as an example.
  • the backlight unit 310 includes a light source 311, a light guide plate 312, a fluorescent film 313, a reflection sheet, a light compensation layer 315, and a light absorbing layer 316.
  • the light source 311 may be a white light, an RGB three-color light source, an RGBW four-color light source, or an RGBY four-color light source, but is not limited thereto, and the light source 311 in this embodiment is used to generate the first wavelength.
  • the first wavelength light exciting the fluorescent film 313 to generate a first excitation light of a specified color
  • the light source 311 is an LED light source, including a blue chip 311a and a red phosphor 311b, wherein the blue light
  • the chip 311a emits blue light
  • the red phosphor 311b is encapsulated around the blue chip 311a, and is excited by the blue light emitted by the blue chip 311a to generate red light.
  • the red phosphor 311b may be a nitride phosphor, a fluoride phosphor or a sulfide phosphor. Therefore, the light source 311 appears to generate magenta light (mixed light of blue light and red light);
  • the light guide plate 312 includes a light incident surface 312a, a bottom surface 312b, a light emitting surface 312c, and a side surface 312d.
  • the light emitting surface 312c is opposite to the bottom surface 312b.
  • the light incident surface 312a is opposite to the side surface 312d and is respectively connected to the light emitting surface 312a.
  • the light source 311 is adjacent to the light incident surface 312a, and the reflective sheet includes a first reflective sheet 314a and a second reflective sheet 314b respectively located at the light guide plate 312. a side of the bottom surface 312b and the side surface 312d;
  • the fluorescent film 313 is located on the side of the light-emitting surface 312c.
  • the material of the fluorescent film 313 includes, for example, a green phosphor and a green quantum dot material.
  • the light emitted by the light guide plate 312 includes blue light and red light. After passing through the fluorescent film 313, a part of the blue light is directly It is revealed that a larger portion of the excitation fluorescent film 313 generates green light, and the red light completely passes through the fluorescent film 313, and red light, blue light and green light are mixed to produce white color on the liquid crystal display panel;
  • the light compensation layer 315 is located on the first reflection sheet 314a and adjacent to the side surface 312d.
  • the light compensation layer 315 is, for example, a dot shape, because the side of the side surface 312d of the light guide plate 312 is directed toward the side of the light incident surface 312a.
  • the degree of color shift of the liquid crystal display panel 320 is getting lighter and lighter. In order to achieve different light compensation effects for different degrees of color cast, the volume and density of each dot on the light compensation layer 315 in this direction are reduced.
  • the material of the light compensation layer 315 includes, for example, a green phosphor or a green quantum dot material, which can absorb blue light, is excited to generate green light, and compensates for the green light of the edge of the liquid crystal display bread 320.
  • the light absorbing layer 316 is located on a side of the second reflective sheet 314b near the side surface 312d, and is composed of a red light absorbing material or a red light absorbing material, and the light absorbing layer 316 has a material characteristic of a red light absorbing band. Or red and blue light bands have higher absorption, and have higher stealing enthalpy for other color light bands, so that when red or red light and blue light are irradiated on the light absorbing layer 316, red light or red light and blue light Light in the band is absorbed, while light in other bands is transmitted unaffected.
  • the light absorbing layer 316 material includes, for example, one or more of an anthraquinone pigment, a calyceoid pigment, and a diimine pigment;
  • the backlight unit 310 is provided with a light absorbing layer 316 and a light compensation layer 315 on the light-emitting surface 312c side of the light guide plate 312.
  • the light absorbing layer 316 is configured to absorb incident light that is incident on the first reflection sheet 314a or the second reflection sheet 314b, thereby solving the incident.
  • the problem of color cast phenomenon caused by the diffuse reflection light generated by the light passing through the reflective sheet directly exiting the light guide plate 312, and the light compensation layer 315 is excited to generate the second excitation light of the same color as the first excitation light, thereby solving the edge of the display screen.
  • the light compensation layer 315 and the light absorbing layer 316 are combined to work together to absorb the specific color spectrum while also compensating for the excitation light of the specified color, thereby making it better.
  • the problem of color cast around the display screen in the prior art is solved.
  • the liquid crystal display panel 320 can be a TN, OCB, or VA type TFT display panel, but is not limited thereto.
  • the liquid crystal display panel 320 may be a liquid crystal display panel having a curved panel.
  • the pixels on the liquid crystal display panel 320 are divided into a plurality of pixel groups. Each pixel group includes an even number of pixels arranged in a matrix. In this embodiment, each pixel group includes four pixels arranged in a matrix, that is, it includes four blue sub-pixels arranged in a matrix, as shown in FIG.
  • Control component 330 includes computing units 332 and 334, as shown in FIG.
  • the calculating unit 334 is configured to receive the picture input signal, and determine an average gray level value of the blue sub-pixel in each pixel group according to the picture input signal.
  • the calculating unit 332 is further configured to obtain two sets of target grayscale value pairs according to the average grayscale value.
  • Each set of target grayscale value pairs includes a high and low grayscale value.
  • the positive viewing angle luminance of the high-low one grayscale value is the same as the positive viewing angle luminance of the corresponding average grayscale value.
  • the target grayscale value pair can be obtained from the grayscale value lookup table.
  • Each grayscale value in the grayscale value lookup table corresponds to two sets of target grayscale value pairs.
  • the grayscale value lookup table can be used to find the corresponding two sets of target grayscale value pairs.
  • a storage component 350 is also included. The storage component 350 is configured to store the grayscale value lookup table.
  • control component 330 further includes a determination unit 336.
  • the determining unit 336 is configured to determine a grayscale range to which the average grayscale value of each pixel group belongs.
  • the obtaining unit 334 is further configured to obtain a corresponding grayscale value lookup table according to the grayscale range, and obtain two sets of target grayscale value pairs by using the corresponding grayscale value lookup table according to the two sets of target grayscale value pairs of each subpixel group.
  • the storage unit 350 stores the grayscale value lookup table corresponding to each grayscale range, the grayscale range and the grayscale value lookup table, and the grayscale value lookup table corresponding to each grayscale range.
  • the obtaining unit 334 is further configured to acquire corresponding two sets of driving voltage pairs according to the two sets of target grayscale value pairs in each pixel group.
  • the driving member 340 is connected to the control unit 330 and the liquid crystal display panel 320, respectively.
  • the driving part 340 is configured to drive the blue sub-pixels on the corresponding pixel groups according to the two sets of driving voltage pairs. Specifically, when the driving component 340 is driven, the driving voltages of the adjacent two blue sub-pixels are controlled to be one high and one low, so that each pixel group is driven by the high and low phase voltages.
  • each set of target grayscale value pairs includes a high-low-low grayscale value, and the mixed positive-angle brightness of the two is the same as the positive-angle brightness of the average grayscale value, so that the brightness is not affected.
  • Corresponding two sets of driving voltage pairs are obtained according to the target gray scale value pair, so that each group of pixels has two driving voltage pairs that improve the apparent role bias. Since different driving voltages have different effects on the effect of different grayscale value ranges, so that the luminance of the blue sub-pixels can be changed from the grayscale value to the high grayscale value after mixing. Close to the positive viewing angle effect, effectively improving the defect of color deviation caused by premature saturation of blue sub-pixels at large viewing angles.

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Abstract

一种液晶显示器件，包括：背光部件（310），其包括导光板（312）、光源（311）、荧光膜（313）、反射片（314）、光补偿层（315）及光吸收层（316）；液晶显示面板（320），其上的像素（92）被划分为多个像素组（90）；每个像素组（90）包括偶数个呈矩阵排布的像素（92）；控制部件（330），包括计算单元（332）和获取单元（334）；计算单元（332）用于接收画面输入信号，并根据画面输入信号求取每个像素组（90）中的蓝色子像素的平均灰阶值，还用于根据平均灰阶值获取两组目标灰阶值对，每组目标灰阶值对包括一高一低的灰阶值；获取单元（334）用于根据每个像素组（90）中的两组目标灰阶值对获取对应的两组驱动电压对；驱动部件（340），分别与控制部件（330）和液晶显示面板（320）连接，用于根据两组驱动电压对对相应的像素组（90）上的蓝色子像素进行驱动。

Description

液晶显示器件 技术领域
本申请涉及液晶显示技术领域，特别是涉及一种液晶显示器件。
背景技术
典型的大尺寸液晶显示器件多采用负型VA液晶或者IPS液晶技术。VA型液晶驱动在大视角下亮度随驱动电压快速饱和，从而导致视角色偏较为严重，进而影响画质品质。由于侧视角蓝色子像素的亮度随灰阶增加，亮度饱和的趋势比红色子像素、绿色子像素来的显著及快速，使得混色视角观察画质会呈现偏蓝色偏的明显缺陷。
发明内容
基于此，有必要提供一种能够改善视角色偏问题的液晶显示器件。
一种液晶显示器件，包括背光部件，其包括导光板、光源、荧光膜、反射片、光补偿层及光吸收层，所述导光板包括入光面、底面、出光面及侧面，所述出光面与所述底面相对，所述入光面与所述侧面相对且分别与连接于所述出光面与所述底面之间；所述光源与所述入光面相邻，用于产生第一波长光与第二波长光；所述荧光膜位于所述出光面侧；所述反射片包括第一反射片和第二反射片，所述第一反射片位于所述底面侧，所述第二反射片位于所述侧面侧，所述光补偿层位于所述第一反射片上且靠近所述侧面处；所述光吸收层位于所述第二反射片上的靠近所述侧面一侧；液晶显示面板，所述液晶显示面板上的像素被划分为多个像素组；每个像素组包括偶数个成矩阵排布的像素；控制部件，包括计算单元和获取单元；所述计算单元用于接收画面输入信号，并根据所述画面输入信号求取每个像素组中的蓝色子像素的平均灰阶值；所述计算单元还用于根据所述平均灰阶值获取两组目标灰阶值对；每组目标灰阶值对包括一高一低的灰阶值；所述一高一低的灰阶值的正视角亮度与所述平均灰阶值的正视角亮度相同；所述获取单元用于根据每个像素组中的两组目标灰阶值对获 取对应的两组驱动电压对；以及驱动部件，分别与所述控制部件和所述液晶显示面板连接；所述驱动部件用于根据所述两组驱动电压对对相应的像素组上的蓝色子像素进行驱动。
在其中一个实施例中，所述获取单元用于根据所述平均灰阶值利用灰阶值查找表进行查找获取得到对应的两组目标灰阶值对；所述灰阶值查找表中的每一灰阶值对应两组目标灰阶值对。
在其中一个实施例中，所述控制部件还包括确定单元；所述确定单元用于确定每个像素组中的蓝色子像素的平均灰阶值所属的灰阶范围；所述获取单元用于根据每个像素组中的所述灰阶范围获取对应的灰阶值查找表，并根据每个像素组中的蓝色子像素的平均灰阶值利用对应的灰阶值查找表获取对应的两组目标灰阶值对。
在其中一个实施例中，还包括存储部件；所述存储部件用于存储所述灰阶值查找表。
在其中一个实施例中，所述驱动部件根据两组驱动电压对对相应的像素组上的蓝色子像素进行驱动时，控制相邻两个蓝色子像素的驱动电压为一高一低。
在其中一个实施例中，所述光吸收层材料为红光吸收材料，或红光与蓝光吸收材料。
在其中一个实施例中，所述光吸收层材料包括酞箐系色素、花箐系色素及二亚胺类色素中的一种或多种。
在其中一个实施例中，所述光补偿层为网点状，沿所述导光板的侧面侧指向入光面侧的方向上，所述光补偿层的体积与密度均减小。
在其中一个实施例中，所述光补偿层材料为绿色量子点材料或绿色荧光粉。
在其中一个实施例中，所述光源为LED光源，所述LED光源包括蓝光芯片和红色荧光粉。
在其中一个实施例中，所述红色荧光粉包括氮化物荧光粉、氟化物荧光粉和硫化物荧光粉中的一种或多种。
在其中一个实施例中，所述荧光膜材料为绿色荧光粉或绿色量子点材料。
附图说明
图1为一实施例中的液晶显示面板的驱动方法的流程图；
图2为图1中执行S110后的像素划分示意图；
图3为图1中的S130的具体流程图；
图4为采用单一驱动电压进行驱动时蓝色子像素在正视角和侧视角下的亮度随灰阶变化曲线对比图；
图5为分别采用高驱动电压、低驱动电压、高低驱动电压对进行驱动时蓝色子像素在侧视角下的亮度随灰阶变化曲线；
图6为执行S150后的驱动示意图；
图7为理想亮度随灰阶的变化曲线与两种电压组合各自的亮度随灰阶变化曲线的对比图；
图8和图9为图7的局部放大图；
图10为一实施例中的液晶显示器件的结构框图；
图11为一实施例中的控制部件的结构框图；
图12为一实施例中的背光部件的结构示意图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
图1为一实施例中的液晶显示面板的驱动方法的流程图。该液晶显示面板的驱动方法可以改善液晶大视角折射率不匹配造成的色偏(或者色差)缺点。尤其是能够有效改善大视角蓝色子像素过早饱和造成色偏的缺陷。液晶显示面板可以为TN、OCB、VA型液晶显示面板以及曲面型液晶显示面板，但并不限于此。
参见图1，该驱动方法包括以下步骤：
S110，将液晶显示面板上的像素划分为多个像素组。
划分后，每个像素组包括偶数个成矩阵排布的像素。在本实施例中，划分 后，每个像素组90包括四个成矩阵排布的像素，如图2所示。每个像素92包括一个红色子像素R、一个绿色子像素G和一个蓝色子像素B，也即，每个像素组90中包括四个成矩阵排布的蓝色子像素。在其他的实施例中，每个像素组中包括的像素个数可以根据需要进行设定。
S120，根据画面输入信号求取每个子像素中的蓝色子像素的平均灰阶值。
每个蓝色子像素的灰阶值用B i，j表示。其中，B表示蓝色，(i，j)表示该蓝色子像素在整个液晶显示面板中的顺序编号。每个子像素组中的蓝色子像素的平均灰阶值B＇n的计算方法如下：
B＇n＝Average(B i，j+B i+1，j+B i，j+1+B i+1，j+1)。
S130，根据每个像素组的该平均灰阶值获取两组目标灰阶值对。
每组目标灰阶值对包括一高一低的灰阶值。该一高一低的灰阶值需要满足二者混合后的正视角亮度与该平均灰阶值B＇n的正视角亮度相同。可选的，一高一低的灰阶值对应的大视角亮度与该平均灰阶值的正视角亮度尽可能接近。在一实施例中，目标灰阶值对中的一高一低的灰阶值二者之间的差值需要大于预设的差值范围，从而确保目标灰阶值对中的两个灰阶值有较大的灰阶差。两组目标灰阶值对具有不同的视角色偏改善范围，其中一组的视角色偏改善范围低于另一组的视角色偏改善范围，也即其中一组能够对高灰阶值大视角的色偏有较好的改善效果，而另一组能够对低灰阶值大视角的色偏有较好的改善效果。在本实施例中，高灰阶值是相对于另一组的低灰阶值而言。大视角可以定义为大于60°，或者根据用户进行自定义。目标灰阶值对的获取可以通过查找灰阶值查找表(LUT)进行查找获取。具体地，灰阶值查找表中的每一灰阶值对应两组目标灰阶值对。一实施例中的灰阶值查找表如下表所示：
Figure PCTCN2017116708-appb-000001
Figure PCTCN2017116708-appb-000002
上述灰阶值查找表仅仅为一个示例，并不构成对具体灰阶值查找表的限定。每个灰阶值查找表中的两组目标灰阶值对的色偏改善范围尽可能不发生重叠，从而确保从低灰阶值到高灰阶值，蓝色子像素的亮度随灰阶值的变化都能够接近正视角效果，有效改善大视角蓝色子像素过早饱和造成色偏的缺陷。灰阶值查找表可以预先存储在存储部件内。因此，根据平均灰阶值即可获取到对应的两组目标灰阶值对。
在一实施例中，目标灰阶值对的获取过程包括以下步骤，如图3所示。
S210，确定每个像素组的蓝色子像素的平均灰阶值所属的灰阶范围。
在确定平均灰阶值所属的灰阶范围之前，会预先将蓝色子像素的灰阶值划分为预设个灰阶范围，比如0～50，51～101，102～152，153～203以及204～255。可以理解，灰阶范围的划分可以根据实际需要进行划分，并不限于此。每个灰阶范围可以根据所需色偏改善的程度决定。不同的灰阶范围划分同样会预先存储在存储部件内，从而可以直接查找获取。
S220，根据该灰阶范围获取对应的灰阶值查找表。
不同的灰阶范围对视角色偏的影响不同，因此不同的灰阶范围对应不同的灰阶值查找表，从而使得对应于不同的灰阶值能够通过更为适合该灰阶范围的目标灰阶值对，目标灰阶值对与驱动电压对应，也即通过更为合适的驱动电压来进行驱动，进而可以确保调节后的蓝色子像素在侧视下的亮度随灰阶变化更接近正视下的变化曲线。各灰阶值范围与灰阶值查找表的对应关系表可以预先存储在存储部件内，因此根据获取到的灰阶范围即可确定对对应的驱动电压。
例如，当平均灰阶值属于0～50之间时采用灰阶值查找表LUT1，如下表：
Figure PCTCN2017116708-appb-000003
当平均灰阶值属于51～100之间时采用灰阶值查找表LUT2，如下表：
Figure PCTCN2017116708-appb-000004
同样，上述仅仅为一具体示例，灰阶值查找表的范围划分以及各灰阶值查找表并不限于上述实施例所限定实现方式。
S230，根据每个像素组中的蓝色子像素的平均灰阶值利用对应的灰阶值查找表获取对应的两组目标灰阶值对。
如上所示，根据获取到平均灰阶值以及灰阶值查找表即可查表获取到对应 的两组目标灰阶值对。
S140，根据每个像素组中的两组目标灰阶值对获取对应的两组驱动电压对。
驱动电压与灰阶值存在一一对应的关系，因此根据灰阶值即可获取到对应的驱动电压。故根据两组目标灰阶值对即可确定对应的两组驱动电压(B n’_H1和B n’_L1，B n’_H2和B n’_L2)。在本实施例中，由于驱动电压与灰阶值存在一一对应关系，因此驱动电压对中同样存在一高一低的驱动电压。驱动电压对可以通过驱动电压查找表查表获取到。驱动电压查找表为蓝色子像素的输入信号中的颜色灰阶值与驱动电压的对应关系表。具体地，蓝色子像素的每个灰阶值对应一个驱动电压信号。
每一组高低驱动电压对能够使得调节后的蓝色子像素在侧视下的亮度随灰阶变化曲线更接近正视下的亮度随灰阶变化曲线。通过高低电压驱动每个子像素组中的蓝色子像素，可以使得侧视角下蓝色子像素的亮度变化得到控制，使得蓝色子像素的饱和趋势接近红色子像素和蓝色子像素或者同正视下红色子像素、绿色子像素和蓝色子像素的亮度饱和曲线趋势接近，来减少视角色偏的缺陷。图4为蓝色子像素采用单一驱动电压时在正视图和侧视角下的亮度随灰阶值变化曲线，其中，L71表示正视下的曲线，L72表示侧视下的曲线。显然在侧视下其亮度随灰阶值变化曲线容易趋近饱和，从而使得混色视角观察画质会呈现偏蓝色偏的明显缺陷。图5为采用高低驱动电压对进行驱动和采用高电压驱动、低电压驱动在侧视角下的亮度变化曲线的对比示意图。其中，L81为高电压驱动时在侧视角下看到的亮度随灰阶变化曲线，L82为低驱动电压在侧视角下看到的亮度随灰阶变化曲线，而L83为L81和L82混合，也即采用高低驱动电压对后看起来的亮度随灰阶变化曲线，显然其更接近正视下的亮度随灰阶变化曲线L84，也即采用高低驱动电压对后能够使得视角色偏获得改善。
由于不同的驱动电压对对不同的灰阶值范围的视角色偏改善效果不同，从而使得两组驱动电压对中必然有一组驱动电压对对应于高灰阶值，而另外一组驱动电压对则对应于低灰阶值。因此。每一像素组中均有一能够对高灰阶值大视角进行色偏改善的驱动电压对和一能够对低灰阶值大视角进行色偏改善的驱动电压对，从而使得从低灰阶值到高灰阶值，蓝色子像素的亮度随灰阶值的变 化都能够接近正视角效果，有效改善大视角蓝色子像素过早饱和造成色偏的缺陷。
S150，根据两组驱动电压对对相应的像素组上的蓝色子像素进行驱动。
具体地，驱动过程中会将两组驱动电压对(B n’_H1和B n’_L1，B n’_H2和B n’_L2)对相应像素组上的蓝色子像素进行分别驱动，以使得相邻两个蓝色子像素的驱动电压为一高一低，从而通过高低电压相间驱动来改善视角色偏缺陷，如图6所示。
上述液晶显示面板的驱动方法，根据液晶显示面板上的每个像素组的平均灰阶值求取两组目标灰阶值对。每组目标灰阶值对包括一高一低的灰阶值，且二者混合的正视角亮度与平均灰阶值的正视角亮度相同，从而不会对亮度产生影响。根据这两组目标灰阶值对获取对应的两组驱动电压对，从而使得每个像素组中有两组对视角色偏进行改善的驱动电压对。由于不同的驱动电压对对不同的灰阶值范围的视角色偏改善效果不同，从而使得混合后从低灰阶值到高灰阶值，蓝色子像素的亮度随灰阶值的变化都能够接近正视角效果，有效改善大视角蓝色子像素过早饱和造成色偏的缺陷。并且，采用上述驱动方法后，液晶显示面板上的像素不用再设计成主要和次要像素，从而大大提升了TFT显示面板的穿透率和解析度，减少了背光设计成本。
下面结合图7～图9对本实施例中的驱动方法的色偏改善效果做进一步说明。参考图7，Target gamma为目标蓝色子像素(blue sub-pixel)的亮度随灰阶值变化曲线，对应于图7中的L61。透过蓝色子像素空间分割必须满足正看RGB亮度比例不变化。蓝色子像素空间分割的高电压与低电压信号有多种组合，每种组合造成的侧看亮度随电压变化饱和的情况不同。如附图7，蓝色子像素空间分割的高电压与低电压组合gamma1与gamma2两种侧看亮度随电压变化饱和的情况，分别对应于图7中的L62和L63。图8和图9为图7的局部放大示意图。从图7～图9中可以看出，采用一组高低电压对对显示面板上的蓝色子像素进行驱动，其亮度随灰阶变换曲线的饱和趋势比Target gamma的变化趋势快很多，从而并不能很好解决侧视角色偏问题。也即，仅一种蓝色子像素空间分割的高电压与低电压组合无法同时满足高低电压亮度与目标亮度贴近的需求。
如附图8所示，当考量低电压(对应于低灰阶值)与亮度变化关系时，gamma1的实际亮度与目标亮度的差异d1(n)远大于gamma2的实际亮度与目标亮度的差异d2(n)。但是如附图9，当考量高电压与亮度变化关系时，gamma1的实际亮度与目标亮度的差异d1(n)远小于gamma2的实际亮度与目标亮度的差异d2(n)。也即，gamma1适合当画质内容上呈现蓝色子像素较高电压信号(也即蓝色子像素的灰阶值较高)的时候。反之，gamma2适合当画质内容上呈现蓝色子像素较低电压信号(也即蓝色子像素的灰阶值较低)的时候。本实施例中的驱动方法，每个像素组包括一适用于高灰阶值的驱动电压对和一适用于低灰阶值的驱动电压对，从而使得两组驱动电压对组合产生的视角亮度变化曲线结合了二者的优势，进而使得视角曲线更贴近目标值需求，曲线变化较为平滑，不会有画质颜色突变或混色异常的现象发生。图7～图9中的gamma3(对应于图7～图9中的L64)即为运用如gamma1加上gamma2的高低电压组合产生的视角亮度曲线。显然gamma3的实际亮度与目标亮度的差异d3(n)始终位于d1(n)和d2(n)之间，也即其变化更贴近目标值需求，从而能够有效改善视角色偏问题。
本申请还提供一种液晶显示器件，如图10所示。该液晶显示器件可以执行上述驱动方法。该液晶显示器件包括背光部件310、液晶显示面板320、控制部件330和驱动部件340。其中，控制部件330和驱动部件340均可以集成在液晶显示面板310上，而背光部件310则可以直接采用背光模组来实现。可以理解，各部件的集成方式并不限于此。
背光部件310用于提供背光。背光部件310可以为直下式背光或者侧入式背光，本实施例以侧入式背光部件为例进行叙述。背光部件310包括光源311、导光板312、荧光膜313、反射片、光补偿层315及光吸收层316。
如图12所示，具体地，光源311可以为白光、RGB三色光源、RGBW四色光源或者RGBY四色光源，但并不限于此，本实施例中的光源311用于产生包括第一波长光与第二波长光的入射光，该第一波长光激发荧光膜313产生指定颜色的第一激发光；可选地，光源311为LED光源，包括蓝光芯片311a与红色荧光粉311b，其中蓝光芯片311a发射出蓝光，红色荧光粉311b封装在蓝光芯片311a周围，受蓝光芯片311a发出的蓝光激发产生红光，红色荧光粉311b 可以为氮化物荧光粉、氟化物荧光粉或者硫化物荧光粉等，因此，光源311表现为产生洋红色的光(蓝光与红光的混合光)；
导光板312包括入光面312a、底面312b、出光面312c及侧面312d，所述出光面312c与所述底面312b相对，所述入光面312a与所述侧面312d相对且分别与连接于所述出光面312c与所述底面312b之间，所述光源311与所述入光面312a相邻；所述反射片包括第一反射片314a和第二反射片314b，分别位于所述导光板312的底面312b和侧面312d一侧；
所述荧光膜313位于所述出光面312c侧，荧光膜313的材料例如包括绿色荧光粉、绿色量子点材料，导光板312出射的光包括蓝光、红光，经过荧光膜313后，蓝光一部分直接透出，更大一部分激发荧光膜313产生绿光，红光完全透过荧光膜313，红光、蓝光与绿光混合，在液晶显示面板上产生白色；
所述光补偿层315位于第一反射片314a上且靠近所述侧面312d处，光补偿层315例如为网点状，因为沿所述导光板312的侧面312d侧指向入光面312a侧的方向上，液晶显示面板320的偏色程度越来越轻，为了达到对不同程度的偏色有不同的光补偿效果，因此在该方向的光补偿层315上各网点的体积与密度均减小。此外，光补偿层315材料例如包括绿色荧光粉或绿色量子点材料，可以吸收蓝光，受激发产生成绿光，对液晶显示面包320边缘进行绿光补偿。
所述光吸收层316位于第二反射片314b上的靠近侧面312d的一侧，其构成材料例如为红光吸收材料，或红光与蓝光吸收材料，光吸收层316材料特性为对红光波段或红光与蓝光波段具有较高的吸收性，对于其它颜色光的波段具有较高的偷过腥，从而当红光或红光与蓝光照射在光吸收层316时，红光或红光与蓝光波段的光被吸收，而其它波段的光能不受影响的透过。可选地，光吸收层316材料例如包括酞箐系色素、花箐系色素及二亚胺类色素中的一种或多种；
上述背光部件310在导光板312出光面312c侧设置光吸收层316与光补偿层315，光吸收层316用于吸收射向第一反射片314a或第二反射片314b的入射光，从而解决入射光经过反射片以后产生的漫反射光直接射出导光板312而产生的偏色现象问题，同时，光补偿层315受激发产生与第一激发光颜色相同的 第二激发光，从而解决显示屏边缘因缺少指定颜色激发光造成的偏色现象问题，光补偿层315与光吸收层316两者相互结合，共同作用，在吸收特定颜色光谱的同时，也能补偿指定颜色的激发光，从而更好地解决现有技术中显示屏周围偏色现象的问题。
液晶显示面板320可以采用TN、OCB、VA型TFT显示面板，但并不限于此。液晶显示面板320可以为具有曲面面板的液晶显示面板。在本实施例中，液晶显示面板320上的像素被划分为多个像素组。每个像素组包括偶数个成矩阵排布的像素。在本实施例中，每个像素组包括四个成矩阵排布的像素，也即其包括四个成矩阵排布的蓝色子像素，如图2所示。
控制部件330包括计算单元332和334，如图11所示。计算单元334用于接收画面输入信号，并根据画面输入信号求取每个像素组中的蓝色子像素的平均灰阶值。计算单元332还用于根据该平均灰阶值获取两组目标灰阶值对。每组目标灰阶值对中包括一高一低的灰阶值。该一高一低的灰阶值的正视角亮度与对应的平均灰阶值的正视角亮度相同。目标灰阶值对可以根据灰阶值查找表获取到。灰阶值查找表中的每一灰阶值对应两组目标灰阶值对。因此根据获取到的平均灰阶值即可通过灰阶值查找表查找到与之对应的两组目标灰阶值对。在一实施例中，还包括存储部件350。存储部件350用于存储该灰阶值查找表。
在一实施例中，控制部件330还包括确定单元336。确定单元336用于确定每个像素组的平均灰阶值所属的灰阶范围。获取单元334还用于根据该灰阶范围获取对应的灰阶值查找表，并根据每个子像素组的两组目标灰阶值对利用对应的灰阶值查找表获取两组目标灰阶值对。在本实施例中，存储部件350会预先对各灰阶范围、各灰阶范围与灰阶值查找表的对应关系以及各灰阶范围对应的灰阶值查找表进行存储。获取单元334还用于根据每个像素组中的两组目标灰阶值对获取对应的两组驱动电压对。
驱动部件340分别与控制部件330和液晶显示面板320连接。驱动部件340用于根据两组驱动电压对对相应的像素组上的蓝色子像素进行驱动。具体地，驱动部件340在进行驱动时，控制相邻两个蓝色子像素的驱动电压为一高一低，从而利用高低相间的电压对每个像素组进行驱动。
上述液晶显示器件，根据液晶显示面板上的每个像素组的平均灰阶值求取两组目标灰阶值对。每组目标灰阶值对包括一高一低的灰阶值，且二者混合的正视角亮度与平均灰阶值的正视角亮度相同，从而不会对亮度产生影响。根据该目标灰阶值对获取对应的两组驱动电压对，从而使得每个像素组中均有两组对视角色偏进行改善的驱动电压对。由于不同的驱动电压对对不同的灰阶值范围的视角色偏改善效果不同，从而使得混合后从低灰阶值到高灰阶值，蓝色子像素的亮度随灰阶值的变化都能够接近正视角效果，有效改善大视角蓝色子像素过早饱和造成色偏的缺陷。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (20)

  1. 一种液晶显示器件，包括：
    背光部件，其包括导光板、光源、荧光膜、反射片、光补偿层及光吸收层，所述导光板包括入光面、底面、出光面及侧面，所述出光面与所述底面相对，所述入光面与所述侧面相对且分别与连接于所述出光面与所述底面之间；所述光源与所述入光面相邻，用于产生第一波长光与第二波长光；所述荧光膜位于所述出光面侧；所述反射片包括第一反射片和第二反射片，所述第一反射片位于所述底面侧，所述第二反射片位于所述侧面侧，所述光补偿层位于所述第一反射片上且靠近所述侧面处；所述光吸收层位于所述第二反射片上的靠近所述侧面一侧；
    液晶显示面板，所述液晶显示面板上的像素被划分为多个像素组；每个像素组包括偶数个成矩阵排布的像素；
    控制部件，包括计算单元和获取单元；所述计算单元用于接收画面输入信号，并根据所述画面输入信号求取每个像素组中的蓝色子像素的平均灰阶值；所述计算单元还用于根据所述平均灰阶值获取两组目标灰阶值对；每组目标灰阶值对包括一高一低的灰阶值；所述一高一低的灰阶值的正视角亮度与所述平均灰阶值的正视角亮度相同；所述获取单元用于根据每个像素组中的两组目标灰阶值对获取对应的两组驱动电压对；以及
    驱动部件，分别与所述控制部件和所述液晶显示面板连接；所述驱动部件用于根据所述两组驱动电压对对相应的像素组上的蓝色子像素进行驱动；
    其中，所述获取单元用于根据所述平均灰阶值利用灰阶值查找表进行查找获取得到对应的两组目标灰阶值对；所述灰阶值查找表中的每一灰阶值对应两组目标灰阶值对；
    所述控制部件还包括确定单元；所述确定单元用于确定每个像素组中的蓝色子像素的平均灰阶值所属的灰阶范围；所述获取单元用于根据每个像素组中的所述灰阶范围获取对应的灰阶值查找表，并根据每个像素组中的蓝色子像素的平均灰阶值利用对应的灰阶值查找表获取对应的两组目标灰阶值对；
    所述驱动部件根据两组驱动电压对对相应的像素组上的蓝色子像素进行驱动时，控制相邻两个蓝色子像素的驱动电压为一高一低；
    所述光补偿层为网点状，沿所述导光板的侧面侧指向入光面侧的方向上，所述光补偿层的体积与密度均减小。
  2. 一种液晶显示器件，包括：
    背光部件，其包括导光板、光源、荧光膜、反射片、光补偿层及光吸收层，所述导光板包括入光面、底面、出光面及侧面，所述出光面与所述底面相对，所述入光面与所述侧面相对且分别与连接于所述出光面与所述底面之间；所述光源与所述入光面相邻，用于产生第一波长光与第二波长光；所述荧光膜位于所述出光面侧；所述反射片包括第一反射片和第二反射片，所述第一反射片位于所述底面侧，所述第二反射片位于所述侧面侧，所述光补偿层位于所述第一反射片上且靠近所述侧面处；所述光吸收层位于所述第二反射片上的靠近所述侧面一侧；
    液晶显示面板，所述液晶显示面板上的像素被划分为多个像素组；每个像素组包括偶数个成矩阵排布的像素；
    控制部件，包括计算单元和获取单元；所述计算单元用于接收画面输入信号，并根据所述画面输入信号求取每个像素组中的蓝色子像素的平均灰阶值；所述计算单元还用于根据所述平均灰阶值获取两组目标灰阶值对；每组目标灰阶值对包括一高一低的灰阶值；所述一高一低的灰阶值的正视角亮度与所述平均灰阶值的正视角亮度相同；所述获取单元用于根据每个像素组中的两组目标灰阶值对获取对应的两组驱动电压对；以及
    驱动部件，分别与所述控制部件和所述液晶显示面板连接；所述驱动部件用于根据所述两组驱动电压对对相应的像素组上的蓝色子像素进行驱动。
  3. 根据权利要求2所述的液晶显示器件，其中，所述获取单元用于根据所述平均灰阶值利用灰阶值查找表进行查找获取得到对应的两组目标灰阶值对；所述灰阶值查找表中的每一灰阶值对应两组目标灰阶值对。
  4. 根据权利要求3所述的液晶显示器件，其中，所述光补偿层为网点状，沿所述导光板的侧面侧指向入光面侧的方向上，所述光补偿层的体积与密度均减小。
  5. 根据权利要求4所述的液晶显示器件，其中，所述光补偿层材料为绿色 量子点材料或绿色荧光粉。
  6. 根据权利要求3所述的液晶显示器件，其中，所述控制部件还包括确定单元；所述确定单元用于确定每个像素组中的蓝色子像素的平均灰阶值所属的灰阶范围；所述获取单元用于根据每个像素组中的所述灰阶范围获取对应的灰阶值查找表，并根据每个像素组中的蓝色子像素的平均灰阶值利用对应的灰阶值查找表获取对应的两组目标灰阶值对。
  7. 根据权利要求3所述的液晶显示器件，还包括存储部件，所述存储部件用于存储所述灰阶值查找表。
  8. 根据权利要求2所述的液晶显示器件，其中，所述驱动部件根据两组驱动电压对对相应的像素组上的蓝色子像素进行驱动时，控制相邻两个蓝色子像素的驱动电压为一高一低。
  9. 根据权利要求8所述的液晶显示器件，其中，所述光吸收层材料包括酞箐系色素、花箐系色素及二亚胺类色素中的一种或多种。
  10. 根据权利要求8所述的液晶显示器件，其中，所述光源为LED光源，所述LED光源包括蓝光芯片和红色荧光粉。
  11. 根据权利要求10所述的液晶显示器件，其中，所述红色荧光粉包括氮化物荧光粉、氟化物荧光粉和硫化物荧光粉中的一种或多种。
  12. 根据权利要求2所述的液晶显示器件，其中，所述光吸收层材料为红光吸收材料，或红光与蓝光吸收材料。
  13. 根据权利要求2所述的液晶显示器件，其中，所述光吸收层材料包括酞箐系色素、花箐系色素及二亚胺类色素中的一种或多种。
  14. 根据权利要求13所述的液晶显示器件，其中，所述驱动部件根据两组驱动电压对对相应的像素组上的蓝色子像素进行驱动时，控制相邻两个蓝色子像素的驱动电压为一高一低。
  15. 根据权利要求2所述的液晶显示器件，其中，所述光补偿层为网点状，沿所述导光板的侧面侧指向入光面侧的方向上，所述光补偿层的体积与密度均减小。
  16. 根据权利要求15所述的液晶显示器件，其中，所述光吸收层材料为红 光吸收材料，或红光与蓝光吸收材料。
  17. 根据权利要求15所述的液晶显示器件，其中，所述光补偿层材料为绿色量子点材料或绿色荧光粉。
  18. 根据权利要求2所述的液晶显示器件，其中，所述光源为LED光源，所述LED光源包括蓝光芯片和红色荧光粉。
  19. 根据权利要求18所述的液晶显示器件，其中，所述红色荧光粉包括氮化物荧光粉、氟化物荧光粉和硫化物荧光粉中的一种或多种。
  20. 根据权利要求2所述的液晶显示器件，其中，所述荧光膜材料为绿色荧光粉或绿色量子点材料。
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WO2018113613A1 (zh) 2018-06-28
US10741134B2 (en) 2020-08-11
US20200035172A1 (en) 2020-01-30
WO2018113190A1 (zh) 2018-06-28
US10818252B2 (en) 2020-10-27
CN106782371A (zh) 2017-05-31
US10923053B2 (en) 2021-02-16
WO2018113610A1 (zh) 2018-06-28
WO2018113611A1 (zh) 2018-06-28
WO2018113609A1 (zh) 2018-06-28
CN106782371B (zh) 2018-01-19
US20190325831A1 (en) 2019-10-24

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