WO2019210636A1 - 液晶显示器 - Google Patents

液晶显示器 Download PDF

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Publication number
WO2019210636A1
WO2019210636A1 PCT/CN2018/105593 CN2018105593W WO2019210636A1 WO 2019210636 A1 WO2019210636 A1 WO 2019210636A1 CN 2018105593 W CN2018105593 W CN 2018105593W WO 2019210636 A1 WO2019210636 A1 WO 2019210636A1
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WIPO (PCT)
Prior art keywords
liquid crystal
crystal panel
resolution
backlight
data signal
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PCT/CN2018/105593
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English (en)
French (fr)
Inventor
廖炳杰
张裕桦
胡安乐
Original Assignee
深圳市华星光电技术有限公司
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Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US16/308,477 priority Critical patent/US20210080767A1/en
Publication of WO2019210636A1 publication Critical patent/WO2019210636A1/zh

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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
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G02F1/13471—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells
    • 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
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • 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
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    • 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
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    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
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    • 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
    • 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
    • G02F1/133601—Illuminating devices for spatial active dimming
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
    • 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
    • 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
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
    • 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
    • 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
    • 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
    • G09G2300/02—Composition of display devices
    • G09G2300/023—Display panel composed of stacked panels
    • 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
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a liquid crystal display.
  • LCD Liquid Crystal Display
  • PDA personal digital assistant
  • digital camera computer screen or Laptop screens, etc.
  • backlight type liquid crystal display devices which include a backlight module 100 and a liquid crystal panel 200 disposed on the backlight module 100 .
  • a conventional liquid crystal panel generally includes a color filter substrate (CF) 201, a thin film transistor array substrate (TFT Array Substrate) 202, and a substrate between the two substrates.
  • CF color filter substrate
  • TFT Array Substrate thin film transistor array substrate
  • Liquid Crystal Layer 203. 1 and 2 the working principle of the conventional liquid crystal display is to control the rotation of the liquid crystal molecules in the liquid crystal layer to refract the light of the backlight module by applying a driving voltage, and the light is generated through the color filter substrate 201.
  • the vertical alignment type UD liquid crystal display products commonly available on the market usually do not have the function of local Dimming. Even if some LCD TV models have Local Dimming function, the number of backlight partitions is not enough. In the prior art, the number of backlight partitions is 10 to 200. In the special screen, there is still a display defect: the bright area is not bright enough, the dark area is not dark enough, and the contrast is poor, which affects the user's viewing experience.
  • the present invention provides a liquid crystal display including a backlight module, a first liquid crystal panel disposed on the backlight module, and a second liquid crystal panel disposed on the first liquid crystal panel;
  • the first liquid crystal panel includes a first TFT array substrate and a first liquid crystal layer disposed on the first TFT array substrate; the first liquid crystal panel divides a backlight emitted by the backlight module into n ⁇ m Partition, n ⁇ m is the resolution of the first liquid crystal panel;
  • the second liquid crystal panel includes a second TFT array substrate, a color filter substrate disposed opposite to the second TFT array substrate, and a second portion disposed between the second TFT array substrate and the color filter substrate Liquid crystal layer
  • the resolution of the second liquid crystal panel is higher than the resolution of the first liquid crystal panel.
  • the first liquid crystal panel further includes a first lower polarizer attached under the first TFT array substrate and a first upper polarizer disposed on the first liquid crystal layer.
  • the second liquid crystal panel further includes a second lower polarizer attached under the second TFT array substrate and a second upper polarizer attached above the color filter substrate.
  • the color filter substrate includes at least a red color resist, a green color resist, and a blue color resist.
  • the liquid crystal display further includes a field programmable gate array; the field programmable gate array is configured to process the original data signal, and output a first data signal conforming to the resolution of the first liquid crystal panel to the first liquid crystal panel And outputting, to the second liquid crystal panel, a second data signal that conforms to the resolution of the second liquid crystal panel.
  • the field programmable gate array outputs a first data signal to the first liquid crystal panel and a second data signal to the second liquid crystal panel for synchronization.
  • the resolution of the first liquid crystal panel is 1920 ⁇ 1080, and the resolution of the second liquid crystal panel is 3840 ⁇ 2160.
  • the original data signal conforms to a resolution of 3840 ⁇ 2160; the field programmable gate array outputs a first resolution corresponding to a resolution of 1920 ⁇ 1080 to the first liquid crystal panel by performing compression processing on the original data signal.
  • Data signal The original data signal conforms to a resolution of 3840 ⁇ 2160; the field programmable gate array outputs a first resolution corresponding to a resolution of 1920 ⁇ 1080 to the first liquid crystal panel by performing compression processing on the original data signal.
  • Data signal
  • the present invention provides a liquid crystal display in which a first liquid crystal panel and a second liquid crystal panel are disposed on a backlight module.
  • the first liquid crystal panel divides the backlight emitted by the backlight module into n ⁇ m partitions, where n ⁇ m is the resolution of the first liquid crystal panel, so that the number of backlight partitions is greatly increased, and the first
  • the color filter substrate is not disposed in the liquid crystal panel, and functions like a black and white screen, and can control the light transmittance ratio of each backlight partition to realize fine sub-area adjustment backlight; the backlight of the first liquid crystal panel is adjusted by the sub-area
  • the brightness contrast can be significantly improved, the display effect can be improved, and the display quality can be improved.
  • FIG. 1 is a perspective view of a conventional liquid crystal display
  • FIG. 2 is a perspective exploded view of a liquid crystal panel in a conventional liquid crystal display
  • FIG. 3 is a perspective view of a liquid crystal display of the present invention.
  • FIG. 4 is a perspective exploded view of a liquid crystal display of the present invention.
  • FIG. 5 is a schematic diagram of a field programmable gate array outputting a first data signal to a first liquid crystal panel and a second data signal to a second liquid crystal panel, respectively, in the liquid crystal display of the present invention.
  • the present invention provides a liquid crystal display.
  • the liquid crystal display of the present invention includes a backlight module 1 , a first liquid crystal panel 3 disposed on the backlight module 1 , and a second liquid crystal disposed on the first liquid crystal panel 3 .
  • Panel 5 the liquid crystal display of the present invention.
  • the backlight module 1 is used to emit a backlight.
  • the color filter substrate is not disposed in the first liquid crystal panel 3, and includes only the first TFT array substrate 31 and the first liquid crystal layer 32 disposed on the first TFT array substrate 31. And a first lower polarizer 35 attached under the first TFT array substrate 31 and a first upper polarizer 37 disposed on the first liquid crystal layer 32.
  • the second liquid crystal panel 5 is a conventional liquid crystal panel for color display, and includes a second TFT array substrate 51 and a color filter substrate 53 disposed opposite to the second TFT array substrate 51. a second liquid crystal layer 52 between the second TFT array substrate 51 and the color filter substrate 53, a second lower polarizer 55 attached under the second TFT array substrate 51, and attached to the color filter A second upper polarizer 57 above the sheet substrate 53. Further, the color filter substrate 53 includes at least a red color resist R, a green color resist G, and a blue color resist B such that light passing through the color filter substrate 53 exhibits color.
  • the first liquid crystal panel 3 Since the color filter substrate is not disposed in the first liquid crystal panel 3, it functions like a black and white screen, and only the transmittance ratio of the light can be controlled. Therefore, the first liquid crystal panel 3 is responsible for controlling and adjusting the backlight module 1 The backlight is emitted.
  • the resolution of the first liquid crystal panel 3 is n ⁇ m (n is a positive integer, and m is a positive integer)
  • the first liquid crystal panel 3 divides the backlight emitted by the backlight module 1 into n.
  • the first liquid crystal panel 3 is preferably a full-HD type liquid crystal panel with a color filter removed, and the resolution is 1920 ⁇ 1080, so that the first liquid crystal panel 3 can be used for the backlight module.
  • the backlight emitted by the group 1 is divided into 1920 ⁇ 1080 partitions, and the number of backlight partitions is as high as 2073600, which is 1000 times of the number of backlight partitions of the conventional liquid crystal panel, and the light of each backlight partition of the first liquid crystal panel 3 is controlled to pass through.
  • the ratio can achieve a fine sub-area adjustment backlight, for example, if a partial picture is brighter, increase the light transmission ratio of the plurality of backlight partitions corresponding to the partial picture of the first liquid crystal panel 3; If the image is darker, the light transmittance ratio of the plurality of backlight partitions corresponding to the partial screen of the first liquid crystal panel 3 is reduced, so that the brightness and darkness of the screen are sharp and the contrast is enhanced.
  • the backlight that has been sub-regionally adjusted by the first liquid crystal panel 3 is incident on the second liquid crystal panel 5 for color display, thereby significantly improving the contrast between light and dark, improving the display effect, and improving the display image quality.
  • the resolution of the second liquid crystal panel 5 is higher than the resolution of the first liquid crystal panel 3.
  • the second liquid crystal panel 5 is an ultra high definition liquid crystal panel having a resolution of 3840 ⁇ 2160.
  • the liquid crystal display of the present invention further includes a field programmable gate array FPGA, and the field programmable gate array FPGA is configured to receive the original data signal and process the original data signal.
  • the original data signal conforms to a resolution of 3840 ⁇ 2160, which is the same.
  • the second data signal outputted to the second liquid crystal panel 5 after the original data signal is processed by the field programmable gate array FPGA conforms to a resolution of 3840 ⁇ 2160, and the first output to the first liquid crystal panel 3
  • the data signal conforms to a resolution of 1920 ⁇ 1080.
  • the field programmable gate array FPGA outputs a first data signal conforming to a resolution of 1920 ⁇ 1080 to the first liquid crystal panel 3 by performing compression processing on the original data signal.
  • the first liquid crystal panel and the second liquid crystal panel are disposed on the backlight module.
  • the first liquid crystal panel divides the backlight emitted by the backlight module into n ⁇ m partitions, where n ⁇ m is the resolution of the first liquid crystal panel, so that the number of backlight partitions is greatly increased, and the first
  • the color filter substrate is not disposed in the liquid crystal panel, and functions like a black and white screen, and can control the light transmittance ratio of each backlight partition to realize fine sub-area adjustment backlight; the backlight of the first liquid crystal panel is adjusted by the sub-area

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Liquid Crystal (AREA)

Abstract

一种液晶显示器。所述液晶显示器包括背光模组(1)、设于所述背光模组(1)上的第一液晶面板(3)及设于所述第一液晶面板(3)上的第二液晶面板(5)。所述第一液晶面板(3)将所述背光模组(1)发出的背光划分为n×m个分区，n×m为所述第一液晶面板(3)的解析度，使得背光分区的数目大幅增加，且所述第一液晶面板(3)内不设置彩色滤光片基板，起到类似于黑白屏的作用，能够控制各个背光分区的光线透过比例实现精细的分区域调整背光；经第一液晶面板(3)分区域调整后的背光射入第二液晶面板(5)进行彩色显示，能够明显提高亮暗对比度，改善显示效果，提升显示画质。

Description

液晶显示器 技术领域
本发明涉及显示技术领域，尤其涉及一种液晶显示器。
背景技术
液晶显示器(Liquid Crystal Display，LCD)具有机身薄、省电、无辐射等众多优点，得到了广泛地应用，如：液晶电视、移动电话、个人数字助理(PDA)、数字相机、计算机屏幕或笔记本电脑屏幕等。
请参阅图1，现有市场上的液晶显示器大部分为背光型液晶显示装置，其包背光模组(Backlight module)100及设于所述背光模组100上的液晶面板200。
请参阅图2，现有的液晶面板通常包括一彩色滤光片基板(Color Filter，CF)201、一薄膜晶体管阵列基板(Thin Film Transistor Array Substrate，TFT Array Substrate)202以及一配置于两基板间的液晶层(Liquid Crystal Layer)203。结合图1与图2，现有的液晶显示器的工作原理是通过施加驱动电压来控制液晶层内液晶分子的旋转将背光模组的光线折射出来，光线再经由所述彩色滤光片基板201产生彩色画面。
近年来，液晶显示器一直都在朝更大尺寸、更高解析度的方向发展，由最初的高清(High Definition，HD)、全高清(Full HD，FHD)发展到目前市场上主流的解析度为3840×2160(业内称为4K2K)的超高清(Ultra High Definition，UD)产品。如何做出产品的差异化，是各大显示器厂商面临的一个问题。
目前市面上常见的垂直配向型的UD液晶显示器产品通常不具备局部背光调节(Local Dimming)的功能，即使部分液晶电视(TV)机型带有Local Dimming功能，但由于背光分区数不够多(现有技术中，背光分区的数目为10～200)，在特殊画面下，还是存在显示缺陷：该亮的区域不够亮，该暗的区域不够暗，对比度较差，影响用户的观看体验。
发明内容
本发明的目的在于提供一种液晶显示器，能够使得背光分区的数目大幅增加以精细地进行分区域调整背光，提高亮暗对比度，改善显示效果，提升显示画质。
为实现上述目的，本发明提供一种液晶显示器，包括背光模组、设于所述背光模组上的第一液晶面板及设于所述第一液晶面板上的第二液晶面板；
所述第一液晶面板包括第一TFT阵列基板及设于所述第一TFT阵列基板上的第一液晶层；所述第一液晶面板将所述背光模组发出的背光划分为n×m个分区，n×m为所述第一液晶面板的解析度；
所述第二液晶面板包括第二TFT阵列基板、与所述第二TFT阵列基板相对设置的彩色滤光片基板及设于所述第二TFT阵列基板与彩色滤光片基板之间的第二液晶层；
所述第二液晶面板的解析度高于所述第一液晶面板的解析度。
所述第一液晶面板还包括贴附在所述第一TFT阵列基板下方的第一下偏光片及设于所述第一液晶层上的第一上偏光片。
所述第二液晶面板还包括贴附在所述第二TFT阵列基板下方的第二下偏光片及贴附在所述彩色滤光片基板上方的第二上偏光片。
所述彩色滤光片基板至少包括红色色阻、绿色色阻与蓝色色阻。
所述液晶显示器还包括现场可编程门阵列；所述现场可编程门阵列用于对原始数据信号进行处理，并向所述第一液晶面板输出符合第一液晶面板的解析度的第一数据信号及向所述第二液晶面板输出符合第二液晶面板的解析度的第二数据信号。
所述现场可编程门阵列向所述第一液晶面板输出第一数据信号及向所述第二液晶面板输出第二数据信号同步。
所述第一液晶面板的解析度为1920×1080，所述第二液晶面板的解析度为3840×2160。
所述原始数据信号符合的解析度为3840×2160；所述现场可编程门阵列通过对所述原始数据信号进行压缩处理实现向所述第一液晶面板输出符合解析度为1920×1080的第一数据信号。
本发明的有益效果：本发明提供的一种液晶显示器，在背光模组上设置第一液晶面板及第二液晶面板。所述第一液晶面板将所述背光模组发出的背光划分为n×m个分区，n×m为所述第一液晶面板的解析度，使得背光分区的数目大幅增加，且所述第一液晶面板内不设置彩色滤光片基板，起到类似于黑白屏的作用，能够控制各个背光分区的光线透过比例实现精细的分区域调整背光；经第一液晶面板分区域调整后的背光射入第二液晶面板进行彩色显示，能够明显提高亮暗对比度，改善显示效果，提升显示画质。
附图说明
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图中，
图1为现有的液晶显示器的立体示意图；
图2为现有的液晶显示器中液晶面板的立体分解示意图；
图3为本发明的液晶显示器的立体示意图；
图4为本发明的液晶显示器的立体分解示意图；
图5为本发明的液晶显示器中现场可编程门阵列分别向第一液晶面板输出第一数据信号及向第二液晶面板输出第二数据信号的示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请同时参阅图3至图5，本发明提供一种液晶显示器。
如图3与图4所示，本发明的液晶显示器包括背光模组1、设于所述背光模组1上的第一液晶面板3及设于所述第一液晶面板3上的第二液晶面板5。
所述背光模组1用于发出背光。
与常规的液晶面板相比，所述第一液晶面板3内不设置彩色滤光片基板，仅包括第一TFT阵列基板31、设于所述第一TFT阵列基板31上的第一液晶层32、贴附在所述第一TFT阵列基板31下方的第一下偏光片35及设于所述第一液晶层32上的第一上偏光片37。
所述第二液晶面板5为一常规的用于彩色显示的液晶面板，包括第二TFT阵列基板51、与所述第二TFT阵列基板51相对设置的彩色滤光片基板53、设于所述第二TFT阵列基板51与彩色滤光片基板53之间的第二液晶层52、贴附在所述第二TFT阵列基板51下方的第二下偏光片55及贴附在所述彩色滤光片基板53上方的第二上偏光片57。进一步地，所述彩色滤光片基板53至少包括红色色阻R、绿色色阻G与蓝色色阻B，使得穿过所述彩色滤光片基板53的光线呈现出彩色。
由于所述第一液晶面板3内不设置彩色滤光片基板，起到类似于黑白屏的作用，仅能够控制光线的透过比例，所以该第一液晶面板3负责控制 及调整背光模组1发出的背光。在所述第一液晶面板3的解析度是n×m(n为正整数，m为正整数)的情况下，该第一液晶面板3便将所述背光模组1发出的背光划分为了n×m个分区；进一步地，所述第一液晶面板3优选全高清型的去除了彩色滤光片的液晶面板，解析度达到1920×1080，这样该第一液晶面板3能够将所述背光模组1发出的背光划分为1920×1080个分区，背光分区的数目高达2073600，是传统液晶面板的背光分区数的1000倍之多，通过控制所述第一液晶面板3各个背光分区的光线透过比例能够实现精细的分区域调整背光，例如：若一局部画面较亮，则增大所述第一液晶面板3对应于该局部画面的数个背光分区的光线透过比例；若另一局部画面较暗，则减小所述第一液晶面板3对应于该局部画面的数个背光分区的光线透过比例，使得画面的亮暗分明，对比度增强。经所述第一液晶面板3分区域调整后的背光射入所述第二液晶面板5进行彩色显示，能够明显提高亮暗对比度，改善显示效果，提升显示画质。
所述第二液晶面板5的解析度高于所述第一液晶面板3的解析度。优选地，所述第二液晶面板5是解析度为3840×2160的超高清型的液晶面板。
值得注意的是，要完整地实现分区域调整背光的功能，不仅需要将所述背光模组1发出的背光划分为多个精细的分区即处理背光，还需要对欲用于显示的原始数据信号做搭配背光的相应处理，所以如图5所示，本发明的液晶显示器还包括现场可编程门阵列FPGA，所述现场可编程门阵列FPGA用于接收原始数据信号，对原始数据信号进行处理，然后向所述第一液晶面板3输出符合第一液晶面板3的解析度的第一数据信号及向所述第二液晶面板5输出符合第二液晶面板5的解析度的第二数据信号，且所述现场可编程门阵列FPGA向所述第一液晶面板3输出第一数据信号与向所述第二液晶面板5输出第二数据信号同步，优选地，所述第一数据信号与第二数据信号的频率均为60Hz。
在所述第一液晶面板3的解析度为1920×1080、所述第二液晶面板5的解析度为3840×2160的情况下，所述原始数据信号符合的解析度为3840×2160，相同的原始数据信号经所述现场可编程门阵列FPGA处理后向所述第二液晶面板5输出的第二数据信号符合的解析度保持3840×2160，而向所述第一液晶面板3输出的第一数据信号符合的解析度为1920×1080。进一步地，所述现场可编程门阵列FPGA通过对所述原始数据信号进行压缩处理实现向所述第一液晶面板3输出符合解析度为1920×1080的第一数据信号。
综上所述，本发明的液晶显示器，在背光模组上设置第一液晶面板及 第二液晶面板。所述第一液晶面板将所述背光模组发出的背光划分为n×m个分区，n×m为所述第一液晶面板的解析度，使得背光分区的数目大幅增加，且所述第一液晶面板内不设置彩色滤光片基板，起到类似于黑白屏的作用，能够控制各个背光分区的光线透过比例实现精细的分区域调整背光；经第一液晶面板分区域调整后的背光射入第二液晶面板进行彩色显示，能够明显提高亮暗对比度，改善显示效果，提升显示画质。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明的权利要求的保护范围。

Claims (9)

  1. 一种液晶显示器，包括背光模组、设于所述背光模组上的第一液晶面板及设于所述第一液晶面板上的第二液晶面板；
    所述第一液晶面板包括第一TFT阵列基板及设于所述第一TFT阵列基板上的第一液晶层；所述第一液晶面板将所述背光模组发出的背光划分为n×m个分区，n×m为所述第一液晶面板的解析度；
    所述第二液晶面板包括第二TFT阵列基板、与所述第二TFT阵列基板相对设置的彩色滤光片基板及设于所述第二TFT阵列基板与彩色滤光片基板之间的第二液晶层；
    所述第二液晶面板的解析度高于所述第一液晶面板的解析度。
  2. 如权利要求1所述的液晶显示器，其中，所述第一液晶面板还包括贴附在所述第一TFT阵列基板下方的第一下偏光片及设于所述第一液晶层上的第一上偏光片。
  3. 如权利要求1所述的液晶显示器，其中，所述第二液晶面板还包括贴附在所述第二TFT阵列基板下方的第二下偏光片及贴附在所述彩色滤光片基板上方的第二上偏光片。
  4. 如权利要求2所述的液晶显示器，其中，所述第二液晶面板还包括贴附在所述第二TFT阵列基板下方的第二下偏光片及贴附在所述彩色滤光片基板上方的第二上偏光片。
  5. 如权利要求1所述的液晶显示器，其中，所述彩色滤光片基板至少包括红色色阻、绿色色阻与蓝色色阻。
  6. 如权利要求1所述的液晶显示器，还包括现场可编程门阵列；所述现场可编程门阵列用于对原始数据信号进行处理，并向所述第一液晶面板输出符合第一液晶面板的解析度的第一数据信号及向所述第二液晶面板输出符合第二液晶面板的解析度的第二数据信号。
  7. 如权利要求6所述的液晶显示器，其中，所述现场可编程门阵列向所述第一液晶面板输出第一数据信号及向所述第二液晶面板输出第二数据信号同步。
  8. 如权利要求6所述的液晶显示器，其中，所述第一液晶面板的解析度为1920×1080，所述第二液晶面板的解析度为3840×2160。
  9. 如权利要求8所述的液晶显示器，其中，所述原始数据信号符合的解析度为3840×2160；所述现场可编程门阵列通过对所述原始数据信号进行 压缩处理实现向所述第一液晶面板输出符合解析度为1920×1080的第一数据信号。
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