WO2019192346A1 - 显示装置及其驱动方法 - Google Patents

显示装置及其驱动方法 Download PDF

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Publication number
WO2019192346A1
WO2019192346A1 PCT/CN2019/079593 CN2019079593W WO2019192346A1 WO 2019192346 A1 WO2019192346 A1 WO 2019192346A1 CN 2019079593 W CN2019079593 W CN 2019079593W WO 2019192346 A1 WO2019192346 A1 WO 2019192346A1
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WIPO (PCT)
Prior art keywords
liquid crystal
dimming
display device
polymer liquid
regions
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PCT/CN2019/079593
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English (en)
French (fr)
Inventor
高贤永
余强
曾凡建
伏思庆
陆旭
高亮
雷嗣军
Original Assignee
京东方科技集团股份有限公司
重庆京东方光电科技有限公司
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Application filed by 京东方科技集团股份有限公司, 重庆京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US16/641,717 priority Critical patent/US11094270B2/en
Publication of WO2019192346A1 publication Critical patent/WO2019192346A1/zh

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    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer
    • G—PHYSICS
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    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
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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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    • 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
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    • G02—OPTICS
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    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G—PHYSICS
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    • 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
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    • 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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    • G02F1/00—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
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Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a display device and a driving method.
  • HDR High-Dynamic Range
  • TFT-LCD Thin Film Transistor-Liquid Crystal Display
  • the liquid crystal display LCD
  • the image or character it displays is the result of modulating the light emitted by the backlight. Therefore, the illumination effect of the backlight directly affects the visual effect of the liquid crystal display module.
  • the main technology for LCD to achieve high dynamic contrast is Local Dimming technology.
  • the backlight used in the liquid crystal display realizes high dynamic contrast by controlling the contrast of the displayed image by controlling the brightness of the light emitting diode (LED) in the backlight by adopting a direct type architecture.
  • LED light emitting diode
  • the direct-down architecture has constraints on thickness bottlenecks.
  • the liquid crystal display panel is located on the light exit side of the side-entry backlight module
  • the polymer liquid crystal film is disposed between the liquid crystal display panel and the side-entry backlight module, and the polymer liquid crystal film comprises a plurality of independent dimming regions arranged closely, and each dimming region is configured to be transparent. The rate is independently controlled.
  • the polymer liquid crystal film includes: an electrode structure located in each dimming region, and the electrode structure is configured to control the light dimming region The light transmittance of the polymer liquid crystal layer.
  • the electrode structure includes: a first electrode on one side of the polymer liquid crystal layer, and a second electrode on the other side of the polymer liquid crystal layer; The first electrodes in each of the dimming regions are insulated from each other.
  • the second electrode in each dimming region constitutes an integrated structure.
  • the second electrodes in the respective dimming regions are independent of each other.
  • the second electrodes in each dimming region are electrically connected by a signal line.
  • the material of the polymer liquid crystal layer in the polymer liquid crystal film is a polymer dispersed liquid crystal or a polymer network liquid crystal.
  • each of the dimming regions in the polymer liquid crystal film is arranged in an array.
  • the liquid crystal display panel includes a plurality of sub-pixel regions arranged in an array; and one of the polymer liquid crystal films covers at least the liquid crystal display panel A sub-pixel area in .
  • the liquid crystal display panel includes a plurality of pixel regions arranged in an array; and one of the polymer liquid crystal films covers at least the liquid crystal display panel One pixel area.
  • an embodiment of the present disclosure provides a driving method of the above display device, including:
  • Each dimming region of the polymer liquid crystal film is driven separately according to the driving parameters.
  • determining the driving parameters corresponding to each dimming region according to the gray value of each sub-pixel corresponding to each dimming region specifically includes:
  • the driving parameter corresponding to the preset grayscale threshold range that meets the largest number is used as the driving parameter corresponding to the dimming region.
  • the driving parameter corresponding to the preset grayscale threshold range that meets the maximum number is used as the driving parameter corresponding to the dimming region, and specifically includes:
  • the determined driving voltage is used as a driving parameter corresponding to the dimming area.
  • each of the dimming regions of the polymer liquid crystal film is respectively driven according to the driving parameter, and specifically includes:
  • the first electrode of each dimming region is loaded with a dimming voltage, and the difference between the dimming voltage and the reference voltage is a driving voltage.
  • FIG. 1a and 1b are schematic structural views of a display device according to an embodiment of the present disclosure
  • FIGS. 2a to 2c are schematic structural views of a polymer liquid crystal film in a display device according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of a corresponding relationship between a sub-pixel and a dimming area in a display device according to an embodiment of the present disclosure
  • FIG. 4 is a schematic flowchart diagram of a driving method according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram of driving voltages applied to respective dimming regions in a display device according to an embodiment of the present disclosure.
  • a display device provided by an embodiment of the present disclosure includes:
  • the liquid crystal display panel 200 is located on the light exit side of the side-entry backlight module 100;
  • the polymer liquid crystal film 300 is disposed between the liquid crystal display panel 200 and the side-entry backlight module 100.
  • the polymer liquid crystal film 300 includes a plurality of independent dimming regions 310 arranged in close proximity. Region 310 is configured to independently control light transmittance.
  • the display device adds a polymer liquid crystal film 300 between the edge-lit backlight module 100 and the liquid crystal display panel 200, and divides the polymer liquid crystal film 300 into a plurality of independent dimming regions. 310 way to achieve high dynamic brightness contrast adjustment.
  • the number and size of the dimming regions 310 can be divided according to the contrast range required to be displayed. The larger the contrast range generally required, the finer the dimming region 310 is.
  • the number of the dimming regions 310 needs to be increased correspondingly in the polymer liquid crystal film 300, and even a dimming region 310 can be disposed corresponding to each pixel in the display panel 100. Thereby, the brightness value of each pixel is adjusted to maximize the contrast of the displayed image.
  • the side-lit backlight module 100 includes a light guide plate 110 , a light source 120 disposed on one side of the light guide plate 110 , and a light source 120 disposed outside the light source 120 .
  • the light-emitting surface of the light guide plate 110 emits a uniform backlight, and the different brightness adjustments of the respective light-adjusting regions 310 incident on the liquid crystal display panel 200 are realized by modulation of the respective light-modulating regions in the polymer liquid crystal film 300.
  • the display panel 200 includes at least a polarizing plate 210 , a transparent substrate 220 , a pixel electrode 230 , a liquid crystal layer 240 , a common electrode 250 , and a filter 260 .
  • the specific structure of the pixel electrode 230 and the common electrode 250 may be various and will not be described in detail herein.
  • the polymer liquid crystal film 300 may include: An electrode structure located in each of the dimming regions 310, the electrode structure being configured to control the light transmittance of the polymer liquid crystal layer 303 in the dimming region 310.
  • the voltage applied to the polymer liquid crystal layer 303 can be adjusted by the electrode structure in each of the dimming regions 310, thereby realizing the light transmittance adjustment of the polymer liquid crystal layer 303 in the dimming region.
  • the optical axis of the polymer liquid crystal molecules is deflected to change from a scattering state to a transparent state, thereby adjusting the transmittance of the polymer liquid crystal layer 303.
  • the transmittance of the polymer liquid crystal layer 303 is proportional to the voltage to which it is applied.
  • the curve formed by the transmittance of the polymer liquid crystal layer 303 and the voltage applied thereto can be adjusted to the GMA curve by appropriately adjusting the gray scale voltage value, wherein GMA The curve is a curve of gray scale voltage and transmittance.
  • the GMA curve is 2.2 when the human eye perceives the best degree of brightness.
  • the electrode structure may specifically include: a first electrode 301 located on one side of the polymer liquid crystal layer 303, located in the polymer liquid crystal layer
  • the second electrode 302 on the other side of the 303; the first electrodes 301 in each of the dimming regions 310 are insulated from each other.
  • the first electrodes 301 in each of the dimming regions 310 can be electrically connected to the control circuit 400 through signal lines, respectively, and the first voltage signal loaded to the first electrodes 301 is adjusted by the control circuit 400.
  • the second electrode 302 in each dimming region 310 may constitute an integrated structure, that is, the second electrode 302 in each dimming region 310. Interconnected to form a one-sided electrode.
  • the planar electrode can be electrically coupled directly to the control circuit 400 to load a second voltage signal that can be the same as the common voltage signal in the display panel.
  • the second electrodes 302 in each dimming region 310 may also be independent of each other, that is, the second electrode 302 in each dimming region 310. They are spaced apart from each other.
  • the mutually independent second electrodes 302 can be electrically connected to the control circuit 400 through different signal lines to load the same or different second voltage signals, which can be combined with the liquid crystal display panel 200.
  • the common voltage signal is the same.
  • the second electrodes 302 in each dimming region 310 can be turned on by a signal line, and then uniformly passed through a wire and a control circuit.
  • the 400 is electrically connected to load the same second voltage signal, which may be the same as the common voltage signal in the liquid crystal display panel 200.
  • the arrangement of the dimming regions 310 in the polymer liquid crystal film 300 may be determined according to the arrangement manner of the sub-pixels in the liquid crystal display panel and the range of image contrast required to be displayed.
  • each of the dimming regions 310 in the polymer liquid crystal film 300 may be arranged in an array.
  • the liquid crystal display panel 200 generally includes a plurality of sub-pixel regions R, G, and B arranged in an array; the polymer liquid crystal film 300 One of the dimming regions 310 may cover at least one of the sub-pixel regions R, G, B in the liquid crystal display panel 200.
  • the liquid crystal display panel includes a plurality of pixel regions arranged in an array, that is, one pixel region is composed of RGB; the polymer liquid crystal film 300 One of the dimming regions 310 may cover at least one pixel region RGB in the liquid crystal display panel 200.
  • the material of the polymer liquid crystal layer 303 in the polymer liquid crystal film 300 may be a polymer dispersed liquid crystal (PDLC) or a polymer network liquid crystal (PDLC). PNLC, Polymer Network Liquid Crystal).
  • the embodiment of the present disclosure is not limited to the polymer liquid crystal layer 303 prepared by the above two materials, and loading different voltages on both sides of the polymer liquid crystal film 300 prepared from any polymer liquid crystal material may cause a change in transmittance thereof.
  • the materials are all included in the embodiments of the present disclosure.
  • the display device may be a handheld device, an in-vehicle device, a wearable device, or a computing device having a display function.
  • a handheld device for example, mobile phones, tablet computers, laptops, televisions, smart watches, and the like.
  • the embodiment of the present disclosure further provides a driving method of the above display device, as shown in FIG. 4, including:
  • S402. Determine driving parameters corresponding to the respective dimming regions according to gray values of the respective sub-pixels corresponding to the dimming regions.
  • the S402 determines, according to the gradation value of each sub-pixel corresponding to each dimming region, the driving parameter corresponding to each dimming region, which may specifically include:
  • the driving parameter corresponding to the preset grayscale threshold range that meets the largest number is used as the driving parameter corresponding to the dimming region.
  • the driving parameter corresponding to the preset gray-scale threshold value range that is the largest number is used as the driving parameter corresponding to the dimming area, and may specifically include:
  • the determined driving voltage is used as a driving parameter corresponding to the dimming area.
  • the relationship between the preset grayscale threshold range and the driving voltage is: if the pixel grayscale value of the displayed image is greater than or equal to 0 and less than 64, it is determined to belong to the first set, and the driving voltage loaded for the first set is, for example, 3V ( Volt); if the pixel gray value of the displayed image is greater than or equal to 64, and less than 128, it is determined to belong to the second set, and the driving voltage of 6V is loaded for the second set; if the pixel gray value of the displayed image is greater than or equal to 128, and less than 192, it is determined to belong to the third set, and the driving voltage of 9V is loaded for the third set; if the pixel gray value of the displayed image is greater than or equal to 192 and less than or equal to 256, it is determined to belong to the fourth set, The fourth set loads a 12V drive voltage. According to the above relationship, it can be seen that the brightness of the backlight module includes four brightness values.
  • S403 respectively drives each dimming region of the polymer liquid crystal film according to the driving parameter, and specifically includes:
  • the first electrode of each dimming region is loaded with a dimming voltage, that is, a first voltage signal, and the difference between the dimming voltage and the reference voltage is a driving voltage.
  • embodiments of the present disclosure provide a display device and a driving method thereof, which use different characteristics of a polymer liquid crystal film to load different driving voltages in different dimming regions, thereby changing the transmittance of the polymer liquid crystal film. Therefore, the backlight brightness of different dimming areas can be adjusted without changing the light source, and local dimming is realized, thereby increasing the contrast of the displayed image, thereby improving the visual effect of displaying the image.
  • embodiments of the present disclosure can be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware aspects. Moreover, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

一种显示装置及驱动方法，该显示装置包括：侧入式背光模组（100）；液晶显示面板（200），位于侧入式背光模组（100）的出光侧；聚合物液晶膜片（300），聚合物液晶膜片（300）位于液晶显示面板（200）和侧入式背光模组（100）之间，聚合物液晶膜片（300）包括紧密排列的多个独立调光区域（310），各调光区域（310）被配置为光透过率独立控制。该显示装置利用聚合物液晶膜片（300）的特性，在不同调光区域（310）加载不同的驱动电压，改变聚合物液晶膜片（300）的透过率，无需变更光源，即可实现对不同调光区域（310）的背光亮度的调节，实现区域调光，从而增大了显示图像的对比度，提升显示图像的视觉效果。

Description

显示装置及其驱动方法
相关申请的交叉引用
本申请要求在2018年04月02日提交中国专利局、申请号为201810284973.0、发明名称为“一种侧入式背光模组、显示模组以及背光调节方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及显示技术领域，尤其涉及一种显示装置及驱动方法。
背景技术
由于搭载HDR(High-Dynamic Range，高动态范围图像)技术的显示设备显示的效果与人眼观察到的图像最为接近，随着人眼对图像的显示效果的需求不断提升，因此HDR技术已经成为一种潮流。HDR是一个既需要硬件支持，又需要软件支撑的技术。从硬件层面来说，目前支持HDR的显示器包括有分辨率4K支持HDR的显示器、分辨率2K支持HDR的显示器以及分辨率1080P支持HDR的显示器。通过调节显示器的显示亮度，增强图像中最暗的区域与最亮的区域的对比度，来丰富图像中的层次。
在薄膜效应管液晶显示器(Thin Film Transistor-Liquid Crystal Display，TFT-LCD)显示中，因为液晶显示器(LCD)本身不发光，它显示的图像或字符是它对背光源发出的光线进行调制的结果，因此背光源的发光效果将直接影响到液晶显示模块视觉效果。目前LCD实现高动态对比度的主要技术是区域背光(Local Dimming)技术。液晶显示器中使用的背光源，通过采用直下式架构，通过控制该背光源中的发光二极管(LED)的亮度，调节显示的图像的对比度，使得LCD实现高动态对比度。然而，在显示器轻薄化的大趋势下，直下式架构存在着厚度瓶颈的制约。
综上，现阶段业界亟需在保证显示器轻薄的前提下，增强对比度的图像显示技术。
发明内容
本公开实施例提供的一种显示装置，包括：
侧入式背光模组；
液晶显示面板，位于侧入式背光模组的出光侧；
聚合物液晶膜片，聚合物液晶膜片位于液晶显示面板和侧入式背光模组之间，聚合物液晶膜片包括紧密排列的多个独立调光区域，各调光区域被配置为光透过率独立控制。
在一种可能的实现方式中，在本公开实施例提供的上述显示装置中，聚合物液晶膜片包括：位于各调光区域内的电极结构，电极结构被配置为控制所在调光区域内的聚合物液晶层的光透过率。
在一种可能的实现方式中，在本公开实施例提供的上述显示装置中，电极结构包括：位于聚合物液晶层一侧的第一电极，位于聚合物液晶层另一侧的第二电极；各调光区域内的第一电极之间相互绝缘。
在一种可能的实现方式中，在本公开实施例提供的上述显示装置中，各调光区域内的第二电极构成一体结构。
在一种可能的实现方式中，在本公开实施例提供的上述显示装置中，各调光区域内的第二电极相互独立。
在一种可能的实现方式中，在本公开实施例提供的上述显示装置中，各调光区域内的第二电极之间通过信号线导通。
在一种可能的实现方式中，在本公开实施例提供的上述显示装置中，聚合物液晶膜片中的聚合物液晶层的材料为聚合物分散液晶或聚合物网络液晶。
在一种可能的实现方式中，在本公开实施例提供的上述显示装置中，聚合物液晶膜片中的各调光区域呈阵列排布。
在一种可能的实现方式中，在本公开实施例提供的上述显示装置中，液晶显示面板包括多个呈阵列排布的子像素区域；聚合物液晶膜片中的一个区域至少覆盖液晶显示面板中的一个子像素区域。
在一种可能的实现方式中，在本公开实施例提供的上述显示装置中，液晶显示面板包括多个呈阵列排布的像素区域；聚合物液晶膜片中的一个区域至少覆盖液晶显示面板中的一个像素区域。
另一方面，本公开实施例提供了一种上述显示装置的驱动方法，包括：
根据接收到的待显示图像以及液晶显示面板中子像素与聚合物液晶膜片中各调光区域的对应关系，确定待显示图像中与各调光区域对应的各子像素的灰度值；
根据各调光区域对应的各子像素的灰度值，确定各调光区域对应的驱动参数；
根据驱动参数，分别驱动聚合物液晶膜片的各调光区域。
在一种可能的实现方式中，在本公开实施例提供的上述驱动方法中，根据各调光区域对应的各子像素的灰度值，确定各调光区域对应的驱动参数，具体包括：
针对各调光区域，确定对应的各子像素的灰度值满足不同预设灰阶阈值范围的个数；
将满足个数最多的预设灰阶阈值范围对应的驱动参数作为调光区域对应的驱动参数。
在一种可能的实现方式中，在本公开实施例提供的上述驱动方法中，将满足个数最多的预设灰阶阈值范围对应的驱动参数作为调光区域对应的驱动参数，具体包括：
确定满足个数最多的预设灰阶阈值范围；
根据预先设定的各预设灰阶阈值范围与驱动电压的关系，确定满足个数最多的预设灰阶阈值范围对应的驱动电压；
将确定出的驱动电压作为调光区域对应的驱动参数。
在一种可能的实现方式中，在本公开实施例提供的上述驱动方法中，根据驱动参数，分别驱动聚合物液晶膜片的各调光区域，具体包括：
对各调光区域的第二电极加载基准电压；
对各调光区域的第一电极加载调光电压，调光电压与基准电压的差值为驱动电压。
附图说明
图1a和图1b分别为本公开实施例提供的显示装置的结构示意图；
图2a至图2c分别为本公开实施例提供的显示装置中聚合物液晶膜片的结构示意图；
图3a和图3b分别为本公开实施例提供的显示装置中子像素与调光区域的对应关系的示意图；
图4为本公开实施例提供的驱动方法的流程示意图；
图5为本公开实施例提供的显示装置中各调光区域施加的驱动电压的示意图。
具体实施方式
以下结合说明书附图对本公开的优选实施例进行说明，应当理解，此处所描述的优选实施例仅用于说明和解释本公开，并不用于限定本公开，并且在不冲突的情况下，本公开中的实施例及实施例中的特征可以相互组合。
本公开实施例提供的一种显示装置，如图1a和图1b所示，包括：
侧入式背光模组100；
液晶显示面板200，位于侧入式背光模组100的出光侧；
聚合物液晶膜片300，聚合物液晶膜片300位于液晶显示面板200和侧入式背光模组100之间，聚合物液晶膜片300包括紧密排列的多个独立调光区域310，各调光区域310被配置为光透过率独立控制。
由于相关技术是通过将背光模组的整体划分为多个区域，由多个区域分 别控制光线的透过率，通过该方式背光模组最多也只能划分出百个区域，无法满足对图像的对比度日益增长的需求。而本公开实施例提供的显示装置是在侧入式背光模组100与液晶显示面板200之间增加聚合物液晶膜片300，通过将聚合物液晶膜片300划分成多个独立的调光区域310的方式，实现高动态亮度对比的调节。在聚合物液晶膜片300中可以根据所需显示的对比度范围，划分调光区域310的数量和大小，一般所需对比度范围越大，调光区域310划分越细。当显示面板所需显示图像的对比度范围大时，在聚合物液晶膜片300中需对应增加调光区域310的个数，甚至可以达到显示面板100中的每一像素对应设置一个调光区域310，从而实现调节每一像素的亮度值，以使显示图像的对比度最大化。
具体地，本公开实施例提供的显示装置中，如图1a所示，侧入式背光模组100包括导光板110、设置在导光板110一侧的光源120以及围设在该光源120外的反射板130。导光板110的出光面发出均匀的背光，通过聚合物液晶膜片300中各调光区域的调制，实现各调光区域310入射至液晶显示面板200的不同亮度调节。
具体地，本公开实施例提供的显示装置中，如图1b所示，显示面板200至少包括偏光板210、透明基板220、像素电极230、液晶层240、公共电极250、滤光片260。其中，像素电极230和公共电极250的具体结构可以有多种，在此不作详述。
可选地，在本公开实施例提供的上述显示装置中，为了实现单独控制各调光区域310内的光透过率，如图2a至图2c所示，聚合物液晶膜片300可以包括：位于各调光区域310内的电极结构，电极结构被配置为控制所在调光区域310内的聚合物液晶层303的光透过率。这样，通过各调光区域310内电极结构可以调节施加在聚合物液晶层303的电压，实现对该调光区域内的聚合物液晶层303的光透过率调整。当聚合物液晶层303加载的电压不同时，聚合物液晶分子的光轴进行偏转，使其由散射态转为透明态，从而调节了聚合物液晶层303的透过率。一般地，聚合物液晶层303的透过率随着其加载 的电压成正比。为更好的适应人眼对明暗程度的视觉感知要求，可以将聚合物液晶层303的透过率与其加载的电压形成的曲线，通过适当的调整灰阶电压值来满足GMA曲线，其中，GMA曲线为灰阶电压与透过率的曲线。人眼感知明暗程度最佳的状态时GMA曲线为2.2。
可选地，在本公开实施例提供的上述显示装置中，如图2a至图2c所示，电极结构可以具体包括：位于聚合物液晶层303一侧的第一电极301，位于聚合物液晶层303另一侧的第二电极302；各调光区域310内的第一电极301之间相互绝缘。通过对第一电极301加载不同的第一电压信号，对各第二电极302加载相同的第二电压信号，可以实现调节聚合物液晶层303加载电压的调节，从而实现聚合物液晶层303的透过率调节。
具体地，各调光区域310中的第一电极301可以分别通过信号线与控制电路400电连接，通过控制电路400调节加载至第一电极301的第一电压信号。
可选地，在本公开实施例提供的上述显示装置中，如图2a所示，各调光区域310内的第二电极302可以构成一体结构，即各调光区域310内的第二电极302相互连接构成一面状电极。具体地，面状电极可以直接与控制电路400电连接，以加载第二电压信号，该第二电压信号可以与显示面板中的公共电压信号相同。
可选地，在本公开实施例提供的上述显示装置中，如图2c所示，各调光区域310内的第二电极302也可以相互独立，即各调光区域310内的第二电极302之间相互间隔设置。具体地，相互独立的第二电极302可以分别通过不同的信号线与控制电路400电连接，以加载相同或不同的第二电压信号，该相同的第二电压信号可以与液晶显示面板200中的公共电压信号相同。
可选地，在本公开实施例提供的上述显示装置中，如图2b所示，各调光区域310内的第二电极302之间可以通过信号线导通，之后统一通过一条导线与控制电路400电连接，以加载相同的第二电压信号，该第二电压信号可以与液晶显示面板200中的公共电压信号相同。
在本公开实施例提供的上述显示装置中，聚合物液晶膜片300中调光区域310的排列方式可以根据液晶显示面板中的子像素的排列方式以及所需显示的图像对比度范围确定。
可选地，在本公开实施例提供的上述显示装置中，如图3a和图3b所示，根据对比度调节范围，聚合物液晶膜片300中的各调光区域310可以呈阵列排布。
可选地，在本公开实施例提供的上述显示装置中，如图3b所示，液晶显示面板200一般包括多个呈阵列排布的子像素区域R、G、B；聚合物液晶膜片300中的一个调光区域310可以至少覆盖液晶显示面板200中的一个子像素区域R、G、B。
可选地，在本公开实施例提供的上述显示装置中，如图3a所示，液晶显示面板包括多个呈阵列排布的像素区域，即由RGB构成一个像素区域；聚合物液晶膜片300中的一个调光区域310可以至少覆盖液晶显示面板200中的一个像素区域RGB。
在本公开实施例提供的上述显示装置中，聚合物液晶膜片300中的聚合物液晶层303的材料可以为聚合物分散液晶(PDLC，Polymer Dispersed Liquid Crystal)，也可以为聚合物网络液晶(PNLC，Polymer Network Liquid Crystal)。并且，本公开实施例不限于上述两种材料制备的聚合物液晶层303，向任一聚合物液晶材料制备的聚合物液晶膜片300的两侧加载不同电压，会导致其透过率发生变化的材料均包括在本公开实施例中。
在本公开实施例中，该显示装置可以为具有显示功能的手持设备、车载设备、可穿戴设备或计算设备。例如，手机、平板型电脑、膝上型电脑、电视、智能手表等。
本公开实施例还提供了一种上述显示装置的驱动方法，如图4所示，包括：
S401、根据接收到的待显示图像以及液晶显示面板中子像素与聚合物液晶膜片中各调光区域的对应关系，确定待显示图像中与各调光区域对应的各 子像素的灰度值；
S402、根据各调光区域对应的各子像素的灰度值，确定各调光区域对应的驱动参数；
S403、根据驱动参数，分别驱动聚合物液晶膜片的各调光区域。
可选地，本公开实施例提供的上述驱动方法中，S402根据各调光区域对应的各子像素的灰度值，确定各调光区域对应的驱动参数，可以具体包括：
首先，针对各调光区域，确定对应的各子像素的灰度值满足不同预设灰阶阈值范围的个数；
之后，将满足个数最多的预设灰阶阈值范围对应的驱动参数作为调光区域对应的驱动参数。
可选地，本公开实施例提供的上述驱动方法中，将满足个数最多的预设灰阶阈值范围对应的驱动参数作为调光区域对应的驱动参数，可以具体包括：
确定满足个数最多的预设灰阶阈值范围；
根据预先设定的各预设灰阶阈值范围与驱动电压的关系，确定满足个数最多的预设灰阶阈值范围对应的驱动电压；
将确定出的驱动电压作为调光区域对应的驱动参数。
例如，预设灰度阈值范围与驱动电压的关系为：若显示图像的像素灰度值大于或等于0，且小于64，则确定属于第一集合，针对第一集合加载的驱动电压例如3V(伏，Volt)；若显示图像的像素灰度值大于或等于64，且小于128，则确定属于第二集合，针对第二集合加载6V的驱动电压；若显示图像的像素灰度值大于或等于128，且小于192，则确定属于第三集合，针对第三集合加载9V的驱动电压；若显示图像的像素灰度值大于或等于192，且小于或等于256，则确定属于第四集合，针对第四集合加载12V的驱动电压。根据上述关系可以看出该背光模组的亮度包括四个亮度值。
确定待显示图像中对应的调光区域中的子像素的灰度值，并统计分别落入第一集合、第二集合、第三集合和第四集合中子像素的个数，假设落入第一集合中子像素的个数最多，则确定该调光区域的驱动电压为3V，最终得到 图5所示的各调光区域施加施加的驱动电压。
可选地，本公开实施例提供的上述驱动方法中，S403根据驱动参数，分别驱动聚合物液晶膜片的各调光区域，具体包括：
对各调光区域的第二电极加载基准电压，即第二电压信号；
对各调光区域的第一电极加载调光电压即第一电压信号，调光电压与基准电压的差值为驱动电压。
综上，本公开实施例提供了一种显示装置及其驱动方法，利用聚合物液晶膜片的特性，在不同调光区域加载不同的驱动电压，从而改变聚合物液晶膜片的透过率，从而无需变更光源，即可实现对不同调光区域的背光亮度的调节，实现区域调光(Local Dimming)，从而增大了显示图像的对比度，从而提升显示图像的视觉效果。
本领域内的技术人员应明白，本公开的实施例可提供为方法、***、或计算机程序产品。因此，本公开可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本公开可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本公开是参照根据本公开实施例的方法、设备(***)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或 多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本公开进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (14)

  1. 一种显示装置，其中，包括：
    侧入式背光模组；
    液晶显示面板，位于侧入式背光模组的出光侧；
    聚合物液晶膜片，聚合物液晶膜片位于液晶显示面板和侧入式背光模组之间，聚合物液晶膜片包括紧密排列的多个独立调光区域，各调光区域被配置为光透过率独立控制。
  2. 如权利要求1的显示装置，其中，聚合物液晶膜片包括：位于各调光区域内的电极结构，电极结构被配置为控制所在调光区域内的聚合物液晶层的光透过率。
  3. 如权利要求2的显示装置，其中，电极结构包括：位于聚合物液晶层一侧的第一电极，位于聚合物液晶层另一侧的第二电极；各调光区域内的第一电极之间相互绝缘。
  4. 如权利要求3的显示装置，其中，各调光区域内的第二电极构成一体结构。
  5. 如权利要求3的显示装置，其中，各调光区域内的第二电极相互独立。
  6. 如权利要求5的显示装置，其中，各调光区域内的第二电极之间通过信号线导通。
  7. 如权利要求1-6任一项的显示装置，其中，聚合物液晶膜片中的聚合物液晶层的材料为聚合物分散液晶或聚合物网络液晶。
  8. 如权利要求1-6任一项的显示装置，其中，聚合物液晶膜片中的各调光区域呈阵列排布。
  9. 如权利要求8的显示装置，其中，液晶显示面板包括多个呈阵列排布的子像素区域；聚合物液晶膜片中的一个调光区域至少覆盖液晶显示面板中的一个子像素区域。
  10. 如权利要求8的显示装置，其中，液晶显示面板包括多个呈阵列排 布的像素区域；聚合物液晶膜片中的一个调光区域至少覆盖液晶显示面板中的一个像素区域。
  11. 一种如权利要求1-10任一项的显示装置的驱动方法，其中，包括：
    根据接收到的待显示图像以及液晶显示面板中子像素与聚合物液晶膜片中各调光区域的对应关系，确定待显示图像中与各调光区域对应的各子像素的灰度值；
    根据各调光区域对应的各子像素的灰度值，确定各调光区域对应的驱动参数；
    根据驱动参数，分别驱动聚合物液晶膜片的各调光区域。
  12. 如权利要求11的驱动方法，其中，根据各调光区域对应的各子像素的灰度值，确定各调光区域对应的驱动参数，具体包括：
    针对各调光区域，确定对应的各子像素的灰度值满足不同预设灰阶阈值范围的个数；
    将满足个数最多的预设灰阶阈值范围对应的驱动参数作为调光区域对应的驱动参数。
  13. 如权利要求12的驱动方法，其中，将满足个数最多的预设灰阶阈值范围对应的驱动参数作为调光区域对应的驱动参数，具体包括：
    确定满足个数最多的预设灰阶阈值范围；
    根据预先设定的各预设灰阶阈值范围与驱动电压的关系，确定满足个数最多的预设灰阶阈值范围对应的驱动电压；
    将确定出的驱动电压作为调光区域对应的驱动参数。
  14. 如权利要求13的驱动方法，其中，根据驱动参数，分别驱动聚合物液晶膜片的各调光区域，具体包括：
    对各调光区域的第二电极加载基准电压；
    对各调光区域的第一电极加载调光电压，调光电压与基准电压的差值为驱动电压。
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