WO2019233305A1 - Liquid crystal display apparatus and control method therefor, and application - Google Patents
Liquid crystal display apparatus and control method therefor, and application Download PDFInfo
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- WO2019233305A1 WO2019233305A1 PCT/CN2019/088599 CN2019088599W WO2019233305A1 WO 2019233305 A1 WO2019233305 A1 WO 2019233305A1 CN 2019088599 W CN2019088599 W CN 2019088599W WO 2019233305 A1 WO2019233305 A1 WO 2019233305A1
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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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
Definitions
- the invention relates to the technical field of liquid crystal display, in particular to a liquid crystal display device and a control method and application thereof.
- the liquid crystal display panel has the characteristics of rich colors, good reliability, mature technology, and relatively low cost, and is currently the most widely used display panel.
- the structure of a conventional liquid crystal display panel currently used in display devices is shown in FIG. 1, which includes upper and lower polarizing plates, upper and lower glass substrates, color filters, alignment layers, liquid crystal, and the like.
- the current liquid crystal display panels have some insurmountable defects such as slow response time, narrow viewing angle, high power consumption, and low contrast.
- Figure 2 where arrows indicate light Direction
- the state of the sub-pixel is either closed or on
- the luminous flux entering the two sub-pixels from the lower polarizer is the same and scattered light exists near the sub-pixel.
- the sub-pixel that should have been closed Pixels still have light leakage, which causes serious light leakage in the dark state, resulting in low contrast, impure colors, and low saturation.
- the existing liquid crystal display panel must use a light alignment technology to obtain a relatively high contrast, which makes it complicated to manufacture, high in cost, and low in yield.
- an object of the present invention is to provide a liquid crystal display device and a control method and application thereof, which aim to solve the problem of low contrast of a liquid crystal display panel in the prior art.
- a liquid crystal display device includes a first liquid crystal panel, a second liquid crystal panel, and a backlight module, which are stacked in order.
- the first liquid crystal panel and the second liquid crystal panel are connected to the same signal source.
- the first liquid crystal panel and the second liquid crystal panel simultaneously display different gray levels according to different input signals.
- the first liquid crystal panel is a flat field switching mode liquid crystal panel or a multi-domain vertical alignment liquid crystal panel
- the second liquid crystal panel is a flat field switching mode liquid crystal panel or a multi-domain vertical alignment liquid crystal panel.
- the first liquid crystal panel is a flat field switching mode liquid crystal panel
- the second liquid crystal panel is a multi-domain vertical alignment liquid crystal panel.
- the first liquid crystal panel includes an upper polarizing plate, a first upper glass substrate, a color filter, a first alignment layer, a first liquid crystal layer, and a first lower glass substrate. And the first lower polarizer.
- the second liquid crystal panel layer includes a second upper glass substrate, a second alignment layer, a second liquid crystal layer, a second lower glass substrate, and a second lower polarizing plate, which are stacked.
- the first liquid crystal panel and the second liquid crystal panel have the same size.
- a resolution of the second liquid crystal panel is less than or equal to a resolution of the first liquid crystal panel.
- the sub-pixels of the first liquid crystal panel and the sub-pixels of the second liquid crystal panel are in one-to-one correspondence.
- the first alignment layer and the second alignment layer both adopt friction alignment technology.
- the polarizing angles of the upper polarizing plate and the first lower polarizing plate are perpendicular to each other, and the polarizing angles of the first lower polarizing plate and the second lower polarizing plate are the same.
- a method for controlling a liquid crystal display device as described above comprising the steps of:
- the sub-pixels controlling the first liquid crystal panel and the corresponding sub-pixels of the second liquid crystal panel receive the same grayscale signal.
- each gray level is controlled to be 2.0 to 2.4.
- each gray level is controlled to be 2.2.
- liquid crystal display device as described above, wherein the liquid crystal display device is applied to a mobile phone, a computer, a tablet, or a television.
- the liquid crystal display device provided by the embodiment of the present invention includes two layers of liquid crystal display panels stacked and a backlight module provided on one side of the display panel, and then controls the two layers of liquid crystal display panels to use a signal source. Then, the two layers of liquid crystal display panels are simultaneously controlled by a signal source to display synchronously. In this way, the two-layer liquid crystal display panel can effectively improve the contrast of the light output color and improve the color of the light output. The problem.
- FIG. 1 is a schematic structural diagram of a conventional liquid crystal display panel.
- FIG. 2 is a schematic diagram of the working principle of a conventional liquid crystal display panel.
- FIG. 3 is a schematic structural diagram of a preferred embodiment of a liquid crystal display device according to an embodiment of the present invention.
- FIG. 4 is a schematic structural diagram of a preferred embodiment of a first liquid crystal panel according to an embodiment of the present invention.
- FIG. 5 is a schematic structural diagram of a preferred embodiment of a second liquid crystal panel according to an embodiment of the present invention.
- the liquid crystal display device includes a first liquid crystal panel 100, a second liquid crystal panel 200, and a backlight module 300 which are sequentially stacked.
- the first liquid crystal panel 100 And the second liquid crystal panel 200 is connected to the same signal source.
- the two-layer liquid crystal display panel is controlled to display synchronously, because it is equivalent to adding a new liquid crystal panel, which can greatly reduce the light leakage in the dark state, thereby effectively improving. Contrast.
- the first liquid crystal panel 100 may be a flat field switching mode liquid crystal panel or a multi-domain vertical alignment liquid crystal panel
- the second liquid crystal panel 200 may also be a flat field switching mode liquid crystal panel or a multi-domain vertical liquid crystal panel.
- Alignment LCD panel In some embodiments, the first liquid crystal panel 100 is a flat field switching mode liquid crystal panel, and the second liquid crystal panel 200 is a multi-domain vertical alignment liquid crystal panel, because the main function of the second liquid crystal panel 200 is to control light incidence.
- the first LCD panel 100 is mainly used for displaying final imaging, improving the problem of narrow viewing angles and improving brightness, while the planar field switching LCD panel has a better viewing angle, and the multi-domain vertical alignment LCD panel has higher contrast. Therefore, setting the first liquid crystal panel 100 as a flat field switching mode liquid crystal panel and setting the second liquid crystal panel 200 as a multi-domain vertical alignment liquid crystal panel can achieve higher contrast, better color purity, and a larger viewing angle.
- the first liquid crystal panel 100 includes an upper polarizing plate 101, a first upper glass substrate 102, a color filter 103, and the like.
- the second liquid crystal panel 200 includes a second upper glass substrate 201, a second alignment layer 202, a second liquid crystal layer 203, a second lower glass substrate 204 and Second lower polarizing plate 205.
- the second liquid crystal panel 200 has fewer color filters than the first liquid crystal panel 100, because it is considered that the function of the second liquid crystal panel 200 is to prevent the sub-pixels and sub-pixels that should have been closed due to the optical rotation of the liquid crystal from still having light.
- the leakage causes verification of light leakage in the dark state, which improves the transmission contrast, and omitting the color filter does not affect the realization of its function, and can make the structure more compact and compact.
- the present invention controls the synchronous display of the first liquid crystal panel 100 and the second liquid crystal panel 200 through the same signal source to provide the final image contrast and color purity, it is also convenient to accurately control the first liquid crystal panel in order to obtain better image quality.
- 100 and the second liquid crystal panel 200 In some embodiments, the length and width dimensions of the first liquid crystal panel 100 and the second liquid crystal panel 200 are the same.
- the resolution of the second liquid crystal panel 200 is less than or equal to the resolution of the first liquid crystal panel 100. In some embodiments, the resolution of the second liquid crystal panel 200 is equal to the resolution of the first liquid crystal panel 100 and the sub-pixels of the first liquid crystal panel 100 correspond to the sub-pixels of the second liquid crystal panel 200 one by one. The backlight intensity received by each sub-pixel of the first liquid crystal panel can be adjusted.
- the signals of the first liquid crystal panel 100 and the second liquid crystal panel 200 are derived from the same chip.
- the first liquid crystal panel 100 and the second liquid crystal panel 200 display different gray levels simultaneously according to different input signals.
- the polarizing plate including the first lower polarized light Plate and upper polarizing plate
- the transmittance of the first LCD panel is about 5.5%, and the transmittance of the color filter layer is about 30%.
- the second LCD panel has no color filter layer, and the transmittance is At about 27%, the contrast ratio of the first LCD panel is about 5000.
- the traditional LCD panel structure is the same as the first LCD panel
- the first alignment layer 104 and the second alignment layer 202 both adopt friction alignment technology, which makes the device structure simple to manufacture, and reduces the production yield while reducing the yield. Out of its production cost.
- the polarizing angles of the upper polarizing plate 101 and the first lower polarizing plate 107 are perpendicular to each other, and the polarizing light of the first lower polarizing plate 107 and the second lower polarizing plate 205 The angles are perpendicular to each other.
- a method for controlling a liquid crystal display device as described above comprising the steps of:
- the sub-pixels controlling the first liquid crystal panel and the corresponding sub-pixels of the second liquid crystal panel receive the same grayscale signal. It is precisely by controlling the sub-pixels of the first liquid crystal panel and the corresponding sub-pixels on the second liquid crystal panel to synchronously receive the same grayscale signal for opening and closing control, so that the contrast can be improved and the image can be clearly displayed with fuller color saturation.
- the high and low voltage of the second liquid crystal panel that is, the voltage range corresponding to L255 and L0 should be wide enough.
- the L255 voltage setting should not cause afterimages and take into account energy consumption requirements and IC driving capability.
- the gamma of the second liquid crystal panel may need to be set to 2.2, because the gamma of the final display device is based on the gamma of the first liquid crystal panel.
- the gray-scale setting voltage of the entire liquid crystal device should be as small as possible so that the spectrum variation between the gray-scales is small, that is, the closer the L0-L254 gray-scale spectrum and the L255 spectrum are, the better.
- each grayscale spectrum is changed.
- each gray level is controlled to have a range of 2.0 to 2.4.
- each gray level is controlled.
- the level gamma is 2.2, and the chromaticity coordinates of each gray level are as consistent as possible with L255, for example, they are adjusted to (0.280, 0.290).
- the image quality displayed on the first liquid crystal panel is affected by the backlight, and it needs to be adjusted by the second liquid crystal panel. It is also controlled by the first liquid crystal panel. Therefore, the relationship between the three must be coordinated at the same time to adjust the final result.
- An embodiment of the present invention also provides an application of the liquid crystal display device as described above, wherein the liquid crystal display device is applied to a mobile phone, a computer, a tablet, or a television.
- liquid crystal display device provided by the embodiment of the present invention, two layers of liquid crystal display panels are stacked, a backlight module is provided on one side of the display panel, and then the two layers of liquid crystal display panels are controlled with a signal source.
- the two layers of liquid crystal display panels are controlled by a signal source to display simultaneously. In this way, the two-layer liquid crystal display panel can effectively improve the color contrast of the light output and improve the color of the light output. High problem.
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Abstract
Description
涉及液晶显示技术领域，尤其涉及一种液晶显示装置及其控制方法、应用。The invention relates to the technical field of liquid crystal display, in particular to a liquid crystal display device and a control method and application thereof.
液晶显示面板具有色彩丰富、可靠度好、技术成熟且成本相对较低的特点，是目前应用最为广泛的显示面板。目前显示设备所用传统的液晶显示面板的结构如图1所示，包含上、下偏光板，上、下玻璃基板，彩色滤光片，配向层，液晶等。但是，目前的液晶显示面板有如响应时间慢、视角窄、功耗高、对比度低等一些难以克服的缺陷，液晶显示面板对比度低、颜色不纯净的主要原因如图2所示(其中箭头表示光线方向)，子像素的状态要么是关闭状态要么是打开状态，而由下偏光板进入两颗子像素的光通量是相同的且临近子像素散射光存在，由于液晶旋光性质存在，本应关闭的子像素仍有光漏出，这就造成了暗态时漏光严重，使得对比度低、颜色不纯净、饱和度低。另外，现有的液晶显示面板必须使用光配向技术才能获得相对较高的对比度，这使得其制造复杂、成本高、良率低。The liquid crystal display panel has the characteristics of rich colors, good reliability, mature technology, and relatively low cost, and is currently the most widely used display panel. The structure of a conventional liquid crystal display panel currently used in display devices is shown in FIG. 1, which includes upper and lower polarizing plates, upper and lower glass substrates, color filters, alignment layers, liquid crystal, and the like. However, the current liquid crystal display panels have some insurmountable defects such as slow response time, narrow viewing angle, high power consumption, and low contrast. The main reasons for low contrast and impure color of liquid crystal display panels are shown in Figure 2 (where arrows indicate light Direction), the state of the sub-pixel is either closed or on, and the luminous flux entering the two sub-pixels from the lower polarizer is the same and scattered light exists near the sub-pixel. Due to the optical rotation of the liquid crystal, the sub-pixel that should have been closed Pixels still have light leakage, which causes serious light leakage in the dark state, resulting in low contrast, impure colors, and low saturation. In addition, the existing liquid crystal display panel must use a light alignment technology to obtain a relatively high contrast, which makes it complicated to manufacture, high in cost, and low in yield.
因此，现有技术还有待于改进和发展。Therefore, the existing technology needs to be improved and developed.
发明内容Summary of the Invention
鉴于上述现有技术的不足，本发明的目的在于提供一种液晶显示装置及其控制方法、应用，旨在解决现有技术中液晶显示面板对比度不高的问题。In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a liquid crystal display device and a control method and application thereof, which aim to solve the problem of low contrast of a liquid crystal display panel in the prior art.
本发明的技术方案如下：The technical scheme of the present invention is as follows:
一种液晶显示装置，其中，包括依次叠层设置的第一液晶面板、第二液晶面板及背光模组，所述第一液晶面板及第二液晶面板与同一信号源相接。A liquid crystal display device includes a first liquid crystal panel, a second liquid crystal panel, and a backlight module, which are stacked in order. The first liquid crystal panel and the second liquid crystal panel are connected to the same signal source.
所述的液晶显示装置，其中，第一液晶面板与第二液晶面板根据输入信号不同同步显示不同灰阶。In the liquid crystal display device, the first liquid crystal panel and the second liquid crystal panel simultaneously display different gray levels according to different input signals.
所述的液晶显示装置，其中，所述第一液晶面板为平面场切换模式液晶面板或多畴垂直配向液晶面板，所述第二液晶面板为平面场切换模式液晶面板或多畴 垂直配向液晶面板。In the liquid crystal display device, the first liquid crystal panel is a flat field switching mode liquid crystal panel or a multi-domain vertical alignment liquid crystal panel, and the second liquid crystal panel is a flat field switching mode liquid crystal panel or a multi-domain vertical alignment liquid crystal panel. .
所述的液晶显示装置，其中，所述第一液晶面板为平面场切换模式液晶面板，所述第二液晶面板为多畴垂直配向液晶面板。In the liquid crystal display device, the first liquid crystal panel is a flat field switching mode liquid crystal panel, and the second liquid crystal panel is a multi-domain vertical alignment liquid crystal panel.
所述的液晶显示装置，其中，所述第一液晶面板包括叠层设置的上偏光板、第一上玻璃基板、彩色滤光片、第一配向层、第一液晶层、第一下玻璃基板和第一下偏光板。In the liquid crystal display device, the first liquid crystal panel includes an upper polarizing plate, a first upper glass substrate, a color filter, a first alignment layer, a first liquid crystal layer, and a first lower glass substrate. And the first lower polarizer.
所述的液晶显示装置，其中，所述第二液晶面板层包括叠层设置的第二上玻璃基板、第二配向层、第二液晶层、第二下玻璃基板和第二下偏光板。In the liquid crystal display device, the second liquid crystal panel layer includes a second upper glass substrate, a second alignment layer, a second liquid crystal layer, a second lower glass substrate, and a second lower polarizing plate, which are stacked.
所述的液晶显示装置，其中，所述第一液晶面板与第二液晶面板的尺寸相同。In the liquid crystal display device, the first liquid crystal panel and the second liquid crystal panel have the same size.
所述的液晶显示装置，其中，所述第二液晶面板的解析度小于或等于第一液晶面板的解析度。In the liquid crystal display device, a resolution of the second liquid crystal panel is less than or equal to a resolution of the first liquid crystal panel.
所述的液晶显示装置，其中，所述第一液晶面板的子像素与第二液晶面板的子像素一一对应。In the liquid crystal display device, the sub-pixels of the first liquid crystal panel and the sub-pixels of the second liquid crystal panel are in one-to-one correspondence.
所述的液晶显示装置，其中，所述第一配向层与第二配向层均采用摩擦配向技术。In the liquid crystal display device, the first alignment layer and the second alignment layer both adopt friction alignment technology.
所述的液晶显示装置，其中，所述上偏光板与第一下偏光板的偏光角度相互垂直，所述第一下偏光板与第二下偏光板的偏光角度相同。In the liquid crystal display device, the polarizing angles of the upper polarizing plate and the first lower polarizing plate are perpendicular to each other, and the polarizing angles of the first lower polarizing plate and the second lower polarizing plate are the same.
一种如上所述的液晶显示装置的控制方法，其中，包括步骤：A method for controlling a liquid crystal display device as described above, comprising the steps of:
控制第一液晶面板的子像素与第二液晶面板的对应子像素接收相同灰阶信号。The sub-pixels controlling the first liquid crystal panel and the corresponding sub-pixels of the second liquid crystal panel receive the same grayscale signal.
所述的液晶显示装置的控制方法，其中，调整完各灰阶频谱后，调试第一液晶面板的gamma与色度，控制各灰阶gamma均为2.0～2.4。In the method for controlling a liquid crystal display device, after adjusting the spectrum of each gray level, the gamma and chromaticity of the first liquid crystal panel are adjusted, and each gray level is controlled to be 2.0 to 2.4.
所述的液晶显示装置的控制方法，其中，控制各灰阶gamma为2.2。The control method of the liquid crystal display device, wherein each gray level is controlled to be 2.2.
一种如上所述的液晶显示装置的的应用，其中，将所述液晶显示装置应用于手机、电脑、平板或电视中。An application of the liquid crystal display device as described above, wherein the liquid crystal display device is applied to a mobile phone, a computer, a tablet, or a television.
有益效果：本发明的实施方式所提供的液晶显示装置，将两层液晶显示面板叠层设置，并在显示面板一侧设置背光模组，然后控制两层液晶显示面板均与用一信号源相接，通过一个信号源同时控制两层液晶显示面板同步显示，这样在两层液晶显示面板的作用下，能够有效提高出光颜色对比度，改善出光颜色，解决 了现有技术中液晶显示面板对比度不高的问题。Beneficial effect: The liquid crystal display device provided by the embodiment of the present invention includes two layers of liquid crystal display panels stacked and a backlight module provided on one side of the display panel, and then controls the two layers of liquid crystal display panels to use a signal source. Then, the two layers of liquid crystal display panels are simultaneously controlled by a signal source to display synchronously. In this way, the two-layer liquid crystal display panel can effectively improve the contrast of the light output color and improve the color of the light output. The problem.
图1为传统的液晶显示面板的结构示意图。FIG. 1 is a schematic structural diagram of a conventional liquid crystal display panel.
图2为传统的液晶显示面板工作原理示意图。FIG. 2 is a schematic diagram of the working principle of a conventional liquid crystal display panel.
图3为本发明实施方式所述液晶显示装置的较佳实施例结构示意图。FIG. 3 is a schematic structural diagram of a preferred embodiment of a liquid crystal display device according to an embodiment of the present invention.
图4为本发明实施方式所述第一液晶面板的较佳实施例结构示意图。FIG. 4 is a schematic structural diagram of a preferred embodiment of a first liquid crystal panel according to an embodiment of the present invention.
图5为本发明实施方式所述第二液晶面板的较佳实施例结构示意图。FIG. 5 is a schematic structural diagram of a preferred embodiment of a second liquid crystal panel according to an embodiment of the present invention.
为使本发明的目的、技术方案及效果更加清楚、明确，以下对本发明进一步详细说明。应当理解，此处所描述的实施方式和具体实施例仅仅用以解释本发明，并不用于限定本发明。In order to make the objectives, technical solutions, and effects of the present invention more clear and specific, the present invention is further described in detail below. It should be understood that the embodiments and specific examples described herein are only used to explain the present invention, and are not intended to limit the present invention.
本发明实施方式提供了一种液晶显示装置，其中，如图3所示，包括依次叠层设置的第一液晶面板100、第二液晶面板200及背光模组300，所述第一液晶面板100及第二液晶面板200与同一信号源相接，在一些实施方式中，控制两层液晶显示面板同步显示，因为相当于新增了一个液晶面板，可以将暗态漏光大幅度降低，从而有效提升对比度。An embodiment of the present invention provides a liquid crystal display device. As shown in FIG. 3, the liquid crystal display device includes a first
在一些实施方式中，所述第一液晶面板100可为平面场切换模式液晶面板或多畴垂直配向液晶面板，所述及第二液晶面板200也可为平面场切换模式液晶面板或多畴垂直配向液晶面板。在一些具体实施方式中，所述第一液晶面板100为平面场切换模式液晶面板，所述第二液晶面板200为多畴垂直配向液晶面板，因为第二液晶面板200的主要作用是控制光入射量、提高对比度，而第一液晶面板100的主要作用是用于显示最终成像、改善视角窄的问题并提高亮度，而平面场切换液晶面板视角更优，多畴垂直配向液晶面板对比度更高，因此设置第一液晶面板100为平面场切换模式液晶面板且设置第二液晶面板200为多畴垂直配向液晶面板，可以取得更高的对比度、更佳的颜色纯度及更大的视觉角度。In some embodiments, the first
在一些实施方式中，所述的液晶显示装置中，如图4所示，所述第一液晶面板100包括叠层设置的上偏光板101、第一上玻璃基板102、彩色滤光片103、 第一配向层104、第一液晶层105、第一下玻璃基板106和第一下偏光板107。在一些实施方式中，如图5所示，所述第二液晶面板200包括叠层设置的第二上玻璃基板201、第二配向层202、第二液晶层203、第二下玻璃基板204和第二下偏光板205。可以看出，第二液晶面板200较第一液晶面板100减少了彩色滤光片，因为考虑到第二液晶面板200的作用是防止因为液晶旋光性导致本应关闭的子像素子像素仍有光漏出而造成暗态时漏光验证、提高透光对比度，而省却彩色滤光片并不影响其功能的实现，并且能够使结构更加精简紧凑。In some embodiments, in the liquid crystal display device, as shown in FIG. 4, the first
因为本发明是通过同一个信号源控制第一液晶面板100与第二液晶面板200同步显示来提供最终呈现的图像对比度及颜色纯度，因而为了获取更优的画质也是便于精准控制第一液晶面板100与第二液晶面板200，在一些实施方式中，设置所述第一液晶面板100与第二液晶面板200的长、宽尺寸相同。在一些具体实施方式中，所述第二液晶面板200的解析度小于或等于第一液晶面板100的解析度。在一些实施方式中，所述第二液晶面板200的解析度等于第一液晶面板100的解析度且所述第一液晶面板100的子像素与第二液晶面板200的子像素一一对应，这样可以使第一液晶面板每个子像素所接收到的背光强度实现可调整。Because the present invention controls the synchronous display of the first
在一些实施方式中，第一液晶面板100与第二液晶面板200的信号均来源于同一芯片，第一液晶面板100与第二液晶面板200会根据输入信号不同同步显示不同灰阶，背光经第二液晶面板200后进入第一液晶面板100后再出射的光通量，即实现了精准控制同步控制。如第二液晶面板200全亮子像素临近子像素为关闭状态，则仅有极小部分光会进入第一液晶面板100，因为进入第一液晶面板100后还必须经过偏光板(包括第一下偏光板及上偏光板)、彩色滤光层等低透过层，所以最终几乎不会有光从关闭子像素区漏出。In some embodiments, the signals of the first
以65寸4K 8bits液晶面板为例，目前第一液晶面板透过率为5.5％左右，彩色滤光层透过率为30％左右，第二液晶面板因为无彩色滤光层，透过率在27％左右，第一液晶面板的对比度在5000左右。假设背光亮度为4000nits，则传统液晶显示面板(结构与第一液晶面板一致)L255＝4000*8％＝320nits，L0＝320/1800＝0.18nits，也就是说红/绿/蓝像素点打开时，仍有绿&蓝/红&蓝/红&绿的杂光混入。而如果使用本发明所述的液晶显示装置，L255＝4000*27％*5.5％＝59.4nits，因为两层液晶面板综合作用L0趋近于0，也就 是说红/绿/蓝像素点打开时，基本不会有绿&蓝/红&蓝/红&绿的杂光混入，对比度可以达到1000000:1以上；因为L255亮度较低，可以适当增加背光亮度。Take a 65-inch 4K 8bits LCD panel as an example. At present, the transmittance of the first LCD panel is about 5.5%, and the transmittance of the color filter layer is about 30%. The second LCD panel has no color filter layer, and the transmittance is At about 27%, the contrast ratio of the first LCD panel is about 5000. Assuming the backlight brightness is 4000nits, the traditional LCD panel (structure is the same as the first LCD panel) L255 = 4000 * 8% = 320nits, L0 = 320/1800 = 0.18nits, that is, when the red / green / blue pixels are turned on , There are still green & blue / red & blue / red & green stray light. If the liquid crystal display device of the present invention is used, L255 = 4000 * 27% * 5.5% = 59.4nits, because the comprehensive effect of two-layer liquid crystal panel L0 approaches 0, that is, when the red / green / blue pixels are turned on , Basically no green & blue / red & blue / red & green stray light is mixed in, the contrast can reach more than 1,000,000: 1; because the brightness of L255 is low, the backlight brightness can be appropriately increased.
在一些实施方式中，本发明所述的液晶显示装置中，所述第一配向层104与第二配向层202均采用摩擦配向技术，使得装置结构制作简单，在提高制作良品率的同时也降低了其制作成本。In some embodiments, in the liquid crystal display device of the present invention, the
在一些实施方式中，所述的液晶显示装置中，所述上偏光板101与第一下偏光板107的偏光角度相互垂直，所述第一下偏光板107与第二下偏光板205的偏光角度相互垂直。In some embodiments, in the liquid crystal display device, the polarizing angles of the upper
一种如上所述的液晶显示装置的控制方法，其中，包括步骤：A method for controlling a liquid crystal display device as described above, comprising the steps of:
控制第一液晶面板的子像素与第二液晶面板的对应子像素接收相同灰阶信号。正是通过控制第一液晶面板的子像素与第二液晶面板上的对应子像素同步接收相同的灰阶信号进行开闭控制，才能够实现提高对比度以更饱满的色彩饱和度清晰显示图像。The sub-pixels controlling the first liquid crystal panel and the corresponding sub-pixels of the second liquid crystal panel receive the same grayscale signal. It is precisely by controlling the sub-pixels of the first liquid crystal panel and the corresponding sub-pixels on the second liquid crystal panel to synchronously receive the same grayscale signal for opening and closing control, so that the contrast can be improved and the image can be clearly displayed with fuller color saturation.
在一些实施方式中，控制第二液晶面板的高低电压即L255与L0对应电压范围要足够宽，L255电压设定应不会出现残像且考量能耗需求以及IC驱动能力。在一些具体实施方式中，第二液晶面板gamma可以需要设定为2.2，因为最终显示设备gamma以第一液晶面板gamma为准。而整个液晶装置的灰阶设定电压应尽量使各灰阶之间频谱变化较小，也就是说L0～L254灰阶频谱与L255频谱越接近越好。另外，因为透过第二液晶面板后，各灰阶频谱是在变化的。所以在一些实施方式中，调整完各灰阶频谱后，调试第一液晶面板之gamma与色度，此时控制各灰阶gamma均为2.0～2.4范围，在一些具体实施方式中，控制各灰阶gamma为2.2，而且各灰阶色度坐标与L255尽量一致，例如都调整到(0.280,0.290)。In some embodiments, the high and low voltage of the second liquid crystal panel, that is, the voltage range corresponding to L255 and L0 should be wide enough. The L255 voltage setting should not cause afterimages and take into account energy consumption requirements and IC driving capability. In some embodiments, the gamma of the second liquid crystal panel may need to be set to 2.2, because the gamma of the final display device is based on the gamma of the first liquid crystal panel. The gray-scale setting voltage of the entire liquid crystal device should be as small as possible so that the spectrum variation between the gray-scales is small, that is, the closer the L0-L254 gray-scale spectrum and the L255 spectrum are, the better. In addition, after passing through the second liquid crystal panel, each grayscale spectrum is changed. Therefore, in some embodiments, after adjusting the spectrum of each gray level, the gamma and chromaticity of the first liquid crystal panel are adjusted. At this time, each gray level is controlled to have a range of 2.0 to 2.4. In some specific embodiments, each gray level is controlled. The level gamma is 2.2, and the chromaticity coordinates of each gray level are as consistent as possible with L255, for example, they are adjusted to (0.280, 0.290).
具体地画质调整所需函数如公式(1)所示：The functions required for specific image quality adjustment are shown in formula (1):
也就是说，第一液晶面板上显示的画质即受到背光的影响，又需要接受第二液晶面板的调整，也受到第一液晶面板的控制，因而需要同时协调三者的关系，共同调节最终显示的图像及画质，而在调整第一液晶面板电压时，同样需要注意残像等影响。In other words, the image quality displayed on the first liquid crystal panel is affected by the backlight, and it needs to be adjusted by the second liquid crystal panel. It is also controlled by the first liquid crystal panel. Therefore, the relationship between the three must be coordinated at the same time to adjust the final result. The displayed image and image quality, and when adjusting the voltage of the first liquid crystal panel, it is also necessary to pay attention to the effects of afterimages and the like.
本发明的实施方式还提供了一种如上所述的液晶显示装置的的应用，其中，将所述液晶显示装置应用于手机、电脑、平板或电视中。An embodiment of the present invention also provides an application of the liquid crystal display device as described above, wherein the liquid crystal display device is applied to a mobile phone, a computer, a tablet, or a television.
关于上述应用的技术细节和好处已在上述液晶显示装置中进行了详细阐述，此处不再赘述。The technical details and benefits of the above application have been described in detail in the above-mentioned liquid crystal display device, and will not be repeated here.
综上所述，本发明实施方式所提供的液晶显示装置，将两层液晶显示面板叠层设置，并在显示面板一侧设置背光模组，然后控制两层液晶显示面板均与用一信号源相接，通过一个信号源同时控制两层液晶显示面板同步显示，这样在两层液晶显示面板的作用下，能够有效提高出光颜色对比度，改善出光颜色，解决了现有技术中液晶显示面板对比度不高的问题。In summary, in the liquid crystal display device provided by the embodiment of the present invention, two layers of liquid crystal display panels are stacked, a backlight module is provided on one side of the display panel, and then the two layers of liquid crystal display panels are controlled with a signal source. The two layers of liquid crystal display panels are controlled by a signal source to display simultaneously. In this way, the two-layer liquid crystal display panel can effectively improve the color contrast of the light output and improve the color of the light output. High problem.
应当理解的是，本发明的应用不限于上述的举例，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，所有这些改进和变换都应属于本发明所附权利要求的保护范围。It should be understood that the application of the present invention is not limited to the above examples. For those of ordinary skill in the art, improvements or changes can be made according to the above description, and all these improvements and changes should fall within the protection scope of the appended claims of the present invention.
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| CN101354504A (en) * | 2007-07-25 | 2009-01-28 | Nec液晶技术株式会社 | Stacked LCD Unit |
| CN107908053A (en) * | 2017-12-26 | 2018-04-13 | 惠州市华星光电技术有限公司 | Display panel and display device |
| CN208689323U (en) * | 2018-09-14 | 2019-04-02 | 信利半导体有限公司 | A kind of liquid crystal display die set and display device |
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| JP2008070470A (en) * | 2006-09-12 | 2008-03-27 | Stanley Electric Co Ltd | Liquid crystal display device |
| CN103676364A (en) * | 2013-12-20 | 2014-03-26 | 深圳市华星光电技术有限公司 | Display panel |
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| JPH0588197A (en) * | 1991-09-30 | 1993-04-09 | Fuji Electric Co Ltd | Composite liquid crystal display panel device |
| CN101263417A (en) * | 2005-09-30 | 2008-09-10 | 夏普株式会社 | Liquid crystal display device and television receiver |
| CN101354504A (en) * | 2007-07-25 | 2009-01-28 | Nec液晶技术株式会社 | Stacked LCD Unit |
| CN107908053A (en) * | 2017-12-26 | 2018-04-13 | 惠州市华星光电技术有限公司 | Display panel and display device |
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