WO2015027624A1 - 显示装置 - Google Patents

显示装置 Download PDF

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Publication number
WO2015027624A1
WO2015027624A1 PCT/CN2013/089485 CN2013089485W WO2015027624A1 WO 2015027624 A1 WO2015027624 A1 WO 2015027624A1 CN 2013089485 W CN2013089485 W CN 2013089485W WO 2015027624 A1 WO2015027624 A1 WO 2015027624A1
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WO
WIPO (PCT)
Prior art keywords
filter
blue
red
green
backlight
Prior art date
Application number
PCT/CN2013/089485
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English (en)
French (fr)
Inventor
林丽锋
占红明
王永灿
Original Assignee
京东方科技集团股份有限公司
北京京东方显示技术有限公司
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Application filed by 京东方科技集团股份有限公司, 北京京东方显示技术有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US14/362,116 priority Critical patent/US20150062201A1/en
Publication of WO2015027624A1 publication Critical patent/WO2015027624A1/zh

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Classifications

    • 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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • 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
    • G02F1/133621—Illuminating devices providing coloured light
    • 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
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0235—Field-sequential colour display
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature

Definitions

  • FIG. 2 is a schematic view showing the structure of a display device in the prior art.
  • the display device includes a backlight module 21, a lower polarizing layer 22 is formed on the backlight module 21, a lower substrate 23 is formed on the lower polarizing layer 22, and a liquid crystal layer is formed between the lower substrate 23 and the protective layer 25.
  • a protective layer 25 is formed with a filter layer 26, wherein the filter layer 26 is alternately composed of three kinds of red, green and blue filters.
  • the filter layer 26 is formed with an upper substrate 27, and the upper substrate 27 is formed with Upper polarizing layer 28.
  • a backlight composed of the LED chip 29 and the phosphor 30 is included in the backlight module 21.
  • the current backlights are generally white LED backlights.
  • White LED backlights can be mainly composed of blue LED plus yellow phosphor, blue LED plus yellow red phosphor, blue LED plus red and green phosphor, blue-green LED plus red phosphor. , or red, green and blue LEDs, the color performance of the white LED backlights is increasing.
  • the color performance specifications of liquid crystal displays in this field are divided into: NTSC 72% or less, NTSC 72%, sRGB matching rate 100% (hereinafter referred to as sRGB100%), and Adobe matching rate 100% (hereinafter referred to as Adobel00%).
  • sRGB100% and Adobel00% are high-end products, where sRGB 100% and Adobe 100% specifications are the same for red (R) / blue (B), while for green (G) specifications, Adobel00% is more than sRGB100% high.
  • the color performance of sRGB 100% corresponds to 74.1% of Adobe.
  • Method 1 Replace the blue LED with red and green phosphors into blue-green LEDs and red phosphors. However, under the same power consumption, the overall efficacy of the blue-green LED plus red phosphor is low, and the luminous flux is reduced by more than half compared with the blue LED plus red-green phosphor. Although the transmittance of the filter substrate using the blue-green LED plus red phosphor is about 8% higher than that of the blue LED plus red-green phosphor, the overall brightness of the liquid crystal display still has a loss of more than 46%.
  • Method 2 replace the green filter resin.
  • Table 2 shows a modified example of the green filter resin when sRGB100% is changed to Adobe100%, where X, y is the color coordinate and Y is the transmittance.
  • the transmittance of the green filter resin satisfying the Adobe l00% standard is 40% lower than that of the green filter resin satisfying the sRGB 100% standard.
  • Table 3 shows the sRGB display panel after matching the existing LED backlight on the display product and by replacing the Adobe l00% standard.
  • the chromaticity characteristics of the RGBW of the green filter resin display panel as can be seen from Table 3, after replacing the Adobe l00% standard green filter resin, although the RGB color coordinate setting can satisfy the Adobe l00% problem,
  • the white light color coordinates Wx and Wy are very different from the standard deviation. It can be seen from Table 3 that the deviation of Wx is 0.011 and the deviation of Wy is 0.075. Adjusting the color block of the white LED can be micro-toning coordinates, but due to the large deviation, it is difficult to adjust the color coordinates of the white light to the standard by adjusting the color block of the white LED.
  • the display device of the prior art generally has a problem that the luminance loss is large or the white light color coordinate and the standard deviation are large, and the color performance is low.
  • the technical problem to be solved by the present invention is to reduce the problem that the white light color coordinate and the standard deviation of the display device are large.
  • the present invention discloses a display device including a display panel, a backlight module located under the display panel, and a driving circuit, wherein: the filter substrate of the display panel includes a plurality of sets of filter combinations. Each set of filter combinations includes a red filter, a blue filter, and a transparent filter; the backlight module includes a white light backlight and a green backlight; and the driving circuit drives the white backlight in an odd frame
  • the filter substrate of the display panel includes a plurality of sets of filter combinations.
  • Each set of filter combinations includes a red filter, a blue filter, and a transparent filter
  • the backlight module includes a white light backlight and a green backlight
  • the driving circuit drives the white backlight in an odd frame
  • the source light is emitted, and the red pixel and the blue pixel respectively corresponding to the red filter and the blue filter are displayed, and the green backlight is driven to emit light in an even frame, and the transparent pixel corresponding to the transparent filter is displayed;
  • the driving circuit drives the white light
  • the drive circuit drives the backlight to illuminate and the pixel to display a refresh frequency of 120 Hz.
  • the red filter of the filter substrate is made of a red resin
  • the blue filter is made of a blue resin
  • the transparent filter is made of a transparent material.
  • the filter substrate is further covered with a protective layer.
  • the material of the protective layer is the same as the material of the transparent filter.
  • the white light backlight of the backlight module is formed by a blue LED chip and a yellow phosphor package, or is formed by a blue LED chip and a yellow phosphor package, or The blue LED chip is formed by adding a red-green phosphor package, or is formed by a blue-green LED chip plus a red phosphor package, or is formed by a red-green blue LED chip package; the green backlight is composed of a green LED chip.
  • the white light backlight of the backlight module and the green backlight have a brightness ratio of 1/1 to 1/0.1.
  • the display device of the present invention adds a green backlight and filters red, green and blue in the existing filter substrate on the basis of a combination of a white light backlight and a red, green and blue filter in an existing display device.
  • the position of the green filter in the sheet combination is replaced with a transparent filter for use with a green backlight, such that in the display device of the present invention, two light sources and filter combinations for achieving display are included: White light backlight and red and blue filter; green backlight and transparent filter, by means of driving circuit, the two light sources and filter combination are time-divisionally controlled, which can drive white light backlight and red filter
  • the red and blue pixels corresponding to the slice and the blue filter are respectively displayed, the color coordinates satisfy the requirements of the Adobe red and blue coordinates; and when the green backlight is driven to emit and the transparent pixels corresponding to the transparent filter are displayed, , so that the color coordinates satisfy the requirements of the Adobe green coordinates, so that the deviation of the white light color coordinates from the standard can be reduced while satisfying the Adobe
  • the color of the mixed light can be adjusted and the brightness can be improved while satisfying the Adobe RGB color coordinates, and the manufacturing process of the filter substrate can be reduced, and the manufacturing cost can be reduced.
  • FIG. 1 is a schematic structural view of a display device according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of a display device in the prior art
  • FIG. 3 and 4 respectively show corresponding structural views formed by two main steps in a method of forming a filter layer according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram showing the corresponding structure formed by a main step in the method of forming a filter layer according to another embodiment of the present invention.
  • FIG. 1 is a block diagram showing the structure of a display device according to an embodiment of the present invention.
  • the backlight module 1 is formed with a lower polarizing layer 2
  • the lower polarizing layer 2 is formed with a lower substrate 3
  • the lower substrate 3 and the protective layer 5 are formed with
  • a filter layer 6 is formed on the protective layer 5
  • an upper substrate 7 is formed on the filter layer 6, and an upper polarizing layer 8 is formed on the upper substrate 7.
  • a display device is different from a display device in the prior art in that: the filter layer 6 includes a combination of a plurality of sets of red filters, blue filters, and transparent filters, and The corresponding position of the green filter in the filter layer of the technology is replaced by a transparent filter, wherein the red filter is preferably made of a red resin, the blue filter is preferably made of a blue resin, transparent filter
  • the light sheet is preferably made of a transparent material;
  • the light source in the backlight module 1 includes a white light LED and a green light LED 11, and the white light LED is encapsulated by the LED chip 9 and the phosphor 10.
  • the brightness ratio of the white LED and the green LED may be from 1/1 to 1/0.1.
  • the filter layer 6 according to an embodiment of the present invention can be formed by various methods.
  • a corresponding structural diagram formed by two main steps in the method of forming a color filter layer according to an embodiment of the present invention is shown in Figs.
  • FIG. 3 first, a plurality of sets of red and blue filters 60 are formed on the upper substrate 7, and in each set of red and blue filters 60, the red filter and the blue filter are arranged adjacent to each other, and The adjacent two sets of red and blue filters 60 have a certain interval, and the width of the interval is substantially equal to the width of the red filter or the blue filter.
  • a protective layer 5 is formed on the plurality of sets of red and blue filters 60, the protective layer 5 covers the plurality of sets of red and blue filters 60, and fills two adjacent sets of red and blue filters.
  • Slice 60 The interval between them forms a filter layer 6.
  • the protective layer 5 is subjected to a rubbing treatment to form a flat surface, or a transparent material which can form a flat surface is directly used as a protective layer. This reduces the number of steps in forming the filter layer.
  • a red filter, a blue filter, and a transparent filter may be separately formed on the upper substrate 7 in the same manner as the three types of red, green, and blue filters are formed in the prior art.
  • the sheet is formed to form the filter layer 6, wherein the order in which the red filter, the blue filter, and the transparent filter are formed is not limited; then the protective layer 5 is formed on the filter layer 6.
  • the white LED in the embodiment of the invention may use a blue LED chip plus a yellow phosphor, a blue LED chip plus a yellow red phosphor, a blue LED chip plus a red and green phosphor, a blue-green LED chip plus a red phosphor, or a red-green color.
  • a blue LED chip package is formed.
  • the white LED and the green LED 11 are controlled by a drive circuit (not shown) in a time division manner.
  • the present invention does not limit the driving circuit as long as it satisfies the display required to drive the white LED and the green LED 11 when needed.
  • time division control can be realized by switching between two prior art driving circuits, one driving circuit for driving white LED illumination and corresponding pixels for display, and the other driving circuit for driving green LED 11 to emit light and The pixels corresponding thereto are displayed; for example, an integrated driving circuit can be used to drive the white LED illumination and its corresponding pixels for display and the green LED 11 illumination and corresponding pixels for display in a time-sharing manner.
  • the display panel according to the present invention is a fast response panel, for example, the refresh frequency is 120 Hz, and the driving circuit drives the white LED to emit light in an odd frame (or even frame) and drives the red and blue pixels corresponding to the red and blue color filters 60 for display.
  • the green LED is driven to emit light in an even frame (or an odd frame) and the transparent pixel corresponding to the transparent filter is driven for display.
  • the driving circuit drives the white LED to emit light and drives the red and blue pixels corresponding to the red and blue filters for display
  • the color coordinates satisfy the requirements of Adobe red and blue coordinates; when the driving circuit drives the green LED to emit light and drive and transparent filter
  • the color coordinates meet the requirements of Adobe Green Coordinates. Thereby, a display device that satisfies the Adobe l00% standard is realized.
  • the color coordinates of the mixed white light can be adjusted to meet various display specification requirements by adjusting the brightness of the green LED 11.
  • the scheme according to the embodiment of the present invention satisfies the ratio of sRGB% at the same power consumption when the luminance ratio of the white backlight and the green backlight is 1/0.6 in the case where Adobe 100% is satisfied.
  • the solution is 4.7% higher, 38% higher than the Adobe comparison solution; when the brightness ratio of the white backlight and the green backlight is 1/0.45, the transmittance is 13.1% lower than the sRGB% scheme at the same power consumption, compared with Adobe.
  • the solution is 30% higher; when the brightness ratio of the white backlight and the green backlight is 1/0.3, the transmittance is 31% lower than the 81 ⁇ 3 ⁇ 4% scheme at the same power consumption; 12% higher than the Adobe comparison scheme; When the brightness ratio of the white backlight and the green backlight changes from 1/0.6 to 1/0.3, Wx becomes larger and Wy becomes smaller. Since the white light color coordinate specifications of LCDs for TVs, monitors, and notebooks are different, it can be different according to different products. The need to adjust the brightness ratio of the white light backlight and the green light backlight to achieve white light color coordinates can be adjusted.
  • the manner in which the color shift of the display device according to the present invention is adjusted is not limited to the Adobe 100% mode, and is applicable to any chromaticity requirement that satisfies the RGB color coordinate setting and the white light color coordinates need to be adjusted.
  • the color of the mixed light can be adjusted and the brightness can be improved while satisfying the Adobe RGB color coordinates, and the filter substrate can be reduced in one manufacturing process, thereby reducing manufacturing. cost. While the invention has been described with respect to the embodiments of the embodiments of the embodiments of the invention Within the limits defined.

Abstract

一种显示装置，包括显示面板、位于所述显示面板下方的背光模组（1）以及驱动电路，其中：所述显示面板的滤光片基板（7）包括多组滤光片组合（6），每组滤光片组合（6）包括红滤光片、蓝滤光片和透明滤光片；所述背光模组（1）包括白光背光源和绿光背光源（11）；并且所述驱动电路在奇数帧（或偶数帧）时驱动所述白光背光源发光、将于红滤光片和蓝滤光片分别对应的红像素和蓝像素进行显示，在偶数帧（或奇数帧）时驱动所述绿光背光源（11）发光、将与透明滤光片对应的透明像素进行显示。该显示装置能够在满足Adobe RGB色坐标的前提下，同时实现混合光颜色的可调和亮度的提升。

Description

显示装置
技术领域 本发明涉及显示技术领域， 具体涉及一种显示装置。 背景技术 常规显示装置主要包括显示面板、背光模组以及控制系统。 图 2 示出了现有技术中显示装置的结构示意图。 如图 2所示， 显示装置 包括背光模组 21 , 背光模组 21上形成有下偏光层 22, 下偏光层 22 上形成有下基板 23, 下基板 23与保护层 25之间形成有液晶层 24, 保护层 25上形成有滤光片层 26, 其中滤光片层 26由红绿蓝三种滤 光片交替构成， 滤光片层 26上形成有上基板 27, 上基板 27上形成 有上偏光层 28。 在背光模组 21中包括由 LED芯片 29和荧光粉 30 构成的背光源。
目前的背光源一般都为白光 LED背光源， 白光 LED背光源可 主要由蓝光 LED加黄荧光粉、 蓝光 LED加黄红荧光粉、 蓝光 LED 加红绿荧光粉、 蓝绿光 LED加红荧光粉、 或红绿蓝光 LED构成， 所构成的白光 LED背光源色彩表现能力依次递增。
本领域液晶显示器色彩表现能力规格从低到高依次分为： NTSC 72%以下、 NTSC 72%、 sRGB匹配率 100% (以下简称 sRGB100% )、 Adobe 匹配率 100% (以下简称 Adobel00% )。 其中 sRGB100%和 Adobel00%为高端产品要求， 其中 sRGB 100%和 Adobe 100%规格中 的红（R ) /蓝（B )的规格相同， 而对于绿（G )的规格， Adobel00% 比 sRGB100%更高。 sRGB100%的色彩表现能力对应为 Adobe 的 74.1%。
Figure imgf000004_0001
SRGB100%使用蓝光 LED 加红绿光荧光粉对应即可， 但是 Adobe匹配率还远远不能达到 100%,实现 Adobel00%主要有如下两 种方法：
方法 1、将蓝光 LED加红绿荧光粉更换成蓝绿光 LED加红荧光 粉。 但是同样的功耗下， 蓝绿光 LED加红荧光粉的整体光效低， 与 蓝光 LED加红绿荧光粉相比， 其光通量将降低一半以上。 虽然使用 蓝绿光 LED加红荧光粉的滤光片基板透过率将比使用蓝光 LED加 红绿荧光粉提高 8%左右，但是液晶显示器的整体亮度仍然有 46%以 上的损失。
方法 2、 更换绿色滤光片树脂。 表 2 为 sRGB100%变更至 Adobel00%时， 绿色滤光片树脂的一个变更实例， 其中 X, y为色坐 标， Y表征透过率。 从表 2中可以看出， 釆用满足 Adobel00%标准 的绿色滤光片树脂的透过率比满足 sRGB100%标准的绿色滤光片树 脂的透过率低 40%。 表 2 两种绿色滤光片树脂的规格
Figure imgf000005_0001
由于满足 Adobel00%标准的绿色滤光片树脂的透过率对 RGB 混合的白光色坐标有较大影响， 表 3为显示器产品上匹配现有 LED 背光源后的 sRGB显示面板以及通过更换 Adobel00%标准的绿色滤 光片树脂的显示面板的 RGBW的色度特性， 从表 3中可以看出， 更 换 Adobel00%标准的绿色滤光片树脂之后， 虽然 RGB的色坐标设 置可以满足 Adobel00%的问题， 但是白光色坐标 Wx、 Wy与标准偏 差很大，从表 3中可以看出 Wx的偏差为 0.011 , Wy的偏差为 0.075。 调整白光 LED的色块可微调色坐标， 但是由于偏差较大， 调整白光 LED的色块也很难将白光的色坐标校正至标准。
表 3 两种显示面板的 RGBW的色度特性
Adobel00%
sRGB100%
原 RB+AdobelOO% 标准
原 RGB
的绿色滤光片树脂
Rx 0.640 0.640
Ry 0.330 0.330
RY 0.180 0.180
Gx 0.300 0.210
Gy 0.600 0.710
GY 60.0% 24.0%
Bx 0.150 0.150
By 0.060 0.060 BY 6.0% 6.0%
Wx 0.314 0.303
Wy 0.330 0.255
WY 28.0% 16.0% 因此， 现有技术中的显示装置普遍存在亮度损耗大或者白光色 坐标与标准偏差较大， 对色彩表现能力低的问题。 发明内容
本发明所要解决的技术问题是降低显示装置白光色坐标与标准 偏差较大的问题。
为此目的， 本发明公开了一种显示装置， 包括显示面板、 位于所 述显示面板下方的背光模组以及驱动电路， 其中： 所述显示面板的滤 光片基板包括多组滤光片组合， 每组滤光片组合包括红滤光片、 蓝滤 光片和透明滤光片； 所述背光模组包括白光背光源和绿光背光源； 并 且所述驱动电路在奇数帧时驱动所述白光背光源发光、将与红滤光片 和蓝滤光片分别对应的红像素和蓝像素进行显示，在偶数帧时驱动所 述绿光背光源发光、将与透明滤光片对应的透明像素进行显示； 或者 所述驱动电路在偶数帧时驱动所述白光背光源发光、将与红滤光片和 蓝滤光片分别对应的红像素和蓝像素进行显示，在奇数帧时驱动所述 绿光背光源发光、 将与透明滤光片对应的透明像素进行显示。
优选地，所述驱动电路驱动背光源发光和使像素进行显示的刷新 频率为 120Hz。
优选地， 所述滤光片基板的所述红滤光片由红色树脂制成， 所述 蓝滤光片由蓝色树脂制成， 所述透明滤光片由透明材料制成。
优选地， 所述滤光片基板上还覆盖有保护层。
优选地， 所述保护层的材料与所述透明滤光片的材料相同。 优选地， 所述背光模组的所述白光背光源由蓝光 LED芯片加黄 荧光粉封装形成、 或者由蓝光 LED芯片加黄红荧光粉封装形成、 或 者由蓝光 LED芯片加红绿荧光粉封装形成、或者由蓝绿光 LED芯片 加红荧光粉封装形成、 或者由红绿蓝光 LED芯片封装形成； 所述绿 光背光源由绿光 LED芯片构成。
优选地，所述背光模组的所述白光背光源和所述绿光背光源的亮 度比为 1/1至 1/0.1。
在现有显示装置中通过白光背光源与红绿蓝滤光片组合实现显 示的基础上，本发明的显示装置增加了绿光背光源并且将现有的滤光 片基板中的红绿蓝滤光片组合中的绿滤光片的位置替换为与绿光背 光源相配合使用的透明滤光片， 这样， 在本发明的显示装置中， 包括 用于实现显示的两个光源和滤光片组合： 白光背光源和红蓝滤光片； 绿光背光源和透明滤光片，借助于驱动电路对这两个光源和滤光片组 合进行分时控制，能够在驱动白光背光源发光和与红滤光片和蓝滤光 片分别对应的红像素和蓝像素进行显示时， 使色坐标满足 Adobe红蓝 色坐标的要求；而在驱动绿光背光源发光和与透明滤光片对应的透明 像素进行显示时， 使色坐标满足 Adobe绿色坐标的要求， 从而能够在 满足 Adobel00%规格的同时减小白光色坐标与标准的偏差。通过釆用 本发明所公开的显示装置， 能够在满足 Adobe RGB色坐标的前提下， 同时实现混合光颜色的可调和亮度的提升，并且还可以使滤光片基板 少一道制造工序， 降低制造成本。 附图说明 通过参考附图会更加清楚的理解本发明的特征和优点，附图是示 意性的而不应当理解为对本发明进行任何限制， 在附图中：
图 1示出了根据本发明实施例的显示装置的结构示意图； 图 2示出了现有技术中显示装置的结构示意图；
图 3和图 4分别示出了根据本发明一个实施例的形成滤光片层的 方法中的两个主要步骤所形成的对应结构示意图； 以及 图 5示出了根据本发明另一个实施例的形成滤光片层方法中的一 个主要步骤所形成的对应结构示意图。 具体实施方式 下面将结合附图对本发明的实施例进行详细描述。
图 1示出了根据本发明实施例的显示装置的结构示意图。
如图 1所示， 与现有技术中的显示装置类似， 背光模组 1上形成有 下偏光层 2, 下偏光层 2上形成有下基板 3, 下基板 3与保护层 5之间形 成有液晶层 4,保护层 5上形成有滤光片层 6, 滤光片层 6上形成有上基 板 7, 上基板 7上形成有上偏光层 8。
根据本发明实施例的显示装置与现有技术中的显示装置的不同 之处在于： 滤光片层 6包括多组红滤光片、 蓝滤光片和透明滤光片组 成的组合，现有技术的滤光片层中的绿滤光片的相应位置由透明滤光 片取代， 其中红滤光片优选地由红色树脂制成， 蓝滤光片优选地由蓝 色树脂制成， 透明滤光片优选地由透明材料制成； 背光模组 1中的光 源包括白光 LED和绿光 LED 11 , 所述白光 LED由 LED芯片 9和荧光粉 10封装而成。 所述白光 LED和所述绿光 LED的亮度比可以为 1/1至 1/0.1。
根据本发明实施例的滤光片层 6可以釆用多种方法形成。图 3至图 4中示出了形成根据本发明实施例的滤光片层的方法中的两个主要步 骤所形成的对应结构示意图。 如图 3所示， 首先， 在上基板 7上形成多 组红和蓝滤光片 60, 在每组红和蓝滤光片 60中， 红滤光片和蓝滤光片 相邻布置， 且相邻的两组红和蓝滤光片 60之间具有一定的间隔， 间隔 的宽度大致等于红滤光片或蓝滤光片的宽度。
然后， 如图 4所示， 在多组红和蓝滤光片 60上形成保护层 5, 保护 层 5覆盖多组红和蓝滤光片 60, 并填充相邻的两组红和蓝滤光片 60之 间的间隔， 从而形成了滤光片层 6。 并对保护层 5进行研磨处理， 以形 成平坦表面， 或者直接釆用可形成平坦表面的透明材料作为保护层。 这样可以减少一道形成滤光片层的工序。
或者， 如图 5所示， 也可以釆用与现有技术中形成红绿蓝三种滤 光片一样的方式， 在上基板 7上分别形成红滤光片、 蓝滤光片和透明 滤光片以形成滤光片层 6, 其中红滤光片、 蓝滤光片和透明滤光片的 形成顺序不受限制； 然后在滤光片层 6上形成保护层 5。
本发明实施例中的白光 LED可以釆用蓝光 LED芯片加黄荧光粉、 蓝光 LED芯片加黄红荧光粉、 蓝光 LED芯片加红绿荧光粉、 蓝绿光 LED芯片加红荧光粉、 或者红绿蓝光 LED芯片封装形成。 白光 LED和 绿光 LED 11由驱动电路（未示出）分时进行控制。本发明不对驱动电 路进行限制， 只要其能满足在需要时对白光 LED、绿光 LED 11进行驱 动实现所需要的显示即可。例如， 可以通过两个现有技术的驱动电路 的切换来实现分时控制，一个驱动电路用于驱动白光 LED发光及与其 对应的像素进行显示，另一个驱动电路用于驱动绿光 LED 11发光及与 其对应的像素进行显示； 又例如， 可以釆用一个集成驱动电路来以分 时控制的方式驱动白光 LED发光及其对应的像素进行显示和绿光 LED 11发光及其对应的像素进行显示。
根据本发明的显示面板为快速响应面板,例如刷新频率为 120Hz, 驱动电路在奇数帧（或偶数帧）时驱动白光 LED发光并且驱动与红和 蓝滤光片 60对应的红蓝像素进行显示， 在偶数帧（或奇数帧）驱动绿 光 LED发光并且驱动与透明滤光片对应的透明像素进行显示。 当驱动 电路驱动白光 LED发光并且驱动与红和蓝滤光片对应的红蓝像素进 行显示时， 其色坐标满足 Adobe红蓝色坐标的要求； 当驱动电路驱动 绿光 LED发光并且驱动与透明滤光片对应的透明像素进行显示时，其 色坐标满足 Adobe绿色坐标的要求。 从而实现了满足 Adobel00%规格 的显示装置。
进一步地， 为了适应各种显示规格要求， 可以通过调整绿光 LED 11的亮度， 来使混合白光的色坐标满足各种显示规格要求。
作为一个实施例， 所述白光 LED的 LED芯片 9是蓝光 LED且荧光 粉 10是红绿荧光粉的情况下，将本发明实施例的显示装置与本发明的 背景技术部分提到的 sRGB方案以及两种 Adobe方案的色彩表现能力 规格进行对比， 结果如表 4所示。 表 4本发明实施例的方案与现有技术方案的色彩表现能力规格
Figure imgf000010_0001
两种背光
源的亮度 ― ― ― 1/0.6 1/0.45 1/0.3 比
白光 X 0.314 0.290 0.303 0.283 0.290 0.299 白光 y 0.330 0.336 0.255 0.351 0.317 0.274 白光 Y 28.00% 30.30% 16.00% 29.33% 24.33% 19.33% 亮度降低 0%(参考 ) 46%； 43%； 4.7%† 13.1%； 31%； 其中， 亮度降低是以同样功耗下， 蓝绿光 LED芯片加红荧光粉封 装形成的白光 LED的光通量为蓝光 LED芯片加红绿荧光粉形成的白 光 LED的光通量的一半， 绿光 LED的光通量等于蓝光 LED加红荧光粉 形成的白光 LED的光通量来计算的。
从表 4中可以看出， 根据本发明实施例的方案在满足 Adobel00% 的情况下， 白光背光源和绿光背光源的亮度比为 1/0.6时， 在同样功耗 下透过率比 sRGB%方案高 4.7%, 比 Adobe对比方案高 38%以上； 在白 光背光源和绿光背光源的亮度比为 1/0.45时， 在同样功耗下透过率比 sRGB%方案低 13.1%, 比 Adobe对比方案高 30%以上； 在白光背光源 和绿光背光源的亮度比为 1/0.3时， 在同样功耗下透过率比 81^¾%方 案低 31%; 比 Adobe对比方案高 12%以上； 在白光背光源和绿光背光 源的亮度比从 1/0.6变化至 1/0.3时， Wx变大， Wy变小， 由于电视、 显 示器、 笔记本用 LCD的白光色坐标规格不同， 所以可以根据不同产品 的需要，通过调整白光背光源和绿光背光源的亮度比来实现白光色坐 标可调。
根据本发明的显示装置的调整色偏的方式不局限于 Adobel00% 的方式，适用于任何满足 RGB色坐标设置、 而白光色坐标需要调整的 色度要求。
通过釆用根据本发明实施例的显示装置，能够在满足 Adobe RGB 色坐标的前提下， 同时实现混合光颜色的可调和亮度的提升， 还可以 使滤光片基板少一道制造工序， 降低了制造成本。 虽然结合附图描述了本发明的实施方式，但是本领域技术人员可 以在不脱离本发明的精神和范围的情况下作出各种修改和变型，这样 的修改和变型均落入由所附权利要求所限定的范围之内。

Claims

权 利 要 求 书
1、 一种显示装置， 包括显示面板、 位于所述显示面板下方的背 光模组以及驱动电路， 其特征在于：
所述显示面板的滤光片基板包括多组滤光片组合，每组滤光片组 合包括红滤光片、 蓝滤光片和透明滤光片；
所述背光模组包括白光背光源和绿光背光源； 并且
所述驱动电路在奇数帧时驱动所述白光背光源发光、将与红滤光 片和蓝滤光片分别对应的红像素和蓝像素进行显示，在偶数帧时驱动 所述绿光背光源发光、将与透明滤光片对应的透明像素进行显示； 或 者所述驱动电路在偶数帧时驱动所述白光背光源发光、将与红滤光片 和蓝滤光片分别对应的红像素和蓝像素进行显示，在奇数帧时驱动所 述绿光背光源发光、 将与透明滤光片对应的透明像素进行显示。
2、 根据权利要求 1所述的显示装置， 其特征在于， 所述驱动电路 驱动背光源发光和使像素进行显示的刷新频率为 120Hz。
3、 根据权利要求 1所述的显示装置， 其特征在于： 所述滤光片 基板的所述红滤光片由红色树脂制成， 所述蓝滤光片由蓝色树脂制 成， 所述透明滤光片由透明材料制成。
4、 根据权利要求 1所述的显示装置， 其特征在于： 所述滤光片 基板上还覆盖有保护层。
5、 根据权利要求 4所述的显示装置， 其特征在于： 所述保护层 的材料与所述透明滤光片的材料相同。
6、 根据权利要求 1所述的显示装置， 其特征在于： 所述背光模 组的所述白光背光源由蓝光 LED芯片加黄荧光粉封装形成、 或者由 蓝光 LED芯片加黄红荧光粉封装形成、或者由蓝光 LED芯片加红绿 荧光粉封装形成、 或者由蓝绿光 LED芯片加红荧光粉封装形成， 或 者由红绿蓝光 LED封装形成；所述绿光背光源由绿光 LED芯片构成。
7、 根据权利要求 1-6 中任一项所述的显示装置， 其特征在于： 所述背光模组的所述白光背光源和所述绿光背光源的亮度比为 1/1至 1/0.1。
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