WO2017197928A1 - 显示面板及显示装置 - Google Patents
显示面板及显示装置 Download PDFInfo
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- WO2017197928A1 WO2017197928A1 PCT/CN2017/073019 CN2017073019W WO2017197928A1 WO 2017197928 A1 WO2017197928 A1 WO 2017197928A1 CN 2017073019 W CN2017073019 W CN 2017073019W WO 2017197928 A1 WO2017197928 A1 WO 2017197928A1
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Definitions
- Embodiments of the present invention relate to the field of liquid crystal display technologies, and in particular, to a display panel and a display device.
- Thin Film Transistor Liquid Crystal Display has the characteristics of small size, low power consumption, no radiation, relatively low manufacturing cost, and has a dominant position in the current flat panel display device market.
- the flat panel display device may be, for example, a liquid crystal television, a mobile phone, a personal digital assistant (PDA), a digital camera, a computer screen, or a laptop screen.
- a liquid crystal display device includes a housing, a liquid crystal display panel disposed in the housing, and a backlight module.
- the liquid crystal display panel of the core component of the TFT-LCD is mainly composed of a Thin Film Transistor Array Substrate (TFT Array Substrate), a Color Filter (CF) pair box, and a substrate between the two substrates.
- the liquid crystal layer (Liquid Crystal Layer) is composed of.
- the process of the box is to prevent the liquid crystal from flowing between the array substrate and the color filter substrate, and the sealant is coated on the peripheral edges of the array substrate and the color filter substrate to form a liquid crystal cell, thereby achieving the purpose of liquid crystal light guiding and display.
- a spacer is usually provided between the array substrate and the color filter substrate to maintain the thickness of the case.
- the liquid crystal is filled on the array substrate and the color filter substrate, and the liquid crystal deflection is controlled by an electric field to control the intensity of the light, and the image to be expressed is displayed in conjunction with the function of the color filter substrate.
- the distance between the array substrate and the color filter substrate is the thickness of the liquid crystal cell, which has an important influence on the liquid crystal display effect. Therefore, it is generally required to accurately control the thickness of the liquid crystal cell during the process of manufacturing the liquid crystal display device.
- the cell gap and the pre angle are two important parameters that affect the performance of the liquid crystal display panel.
- the thickness of the cell is the thickness of the liquid crystal layer disposed between the array substrate and the color filter substrate.
- the thickness of the cell affects the light transmittance of the liquid crystal display panel and the reaction time of the liquid crystal. In order to obtain high contrast, high brightness, and high response speed display, the box thickness must be strictly controlled.
- the response time of liquid crystal displays in the field of AR (Augmented Reality)/VR (Virtual Reality) is extremely demanding (gray order response time GTG ⁇ 3ms).
- process optimization and response time improvement are required.
- the response time of the liquid crystal is divided into two parts: the rising edge time (Ton) is mainly determined by the driving voltage, and the falling edge time (Toff) is determined by the viscous force of the liquid crystal itself. Therefore, while the liquid crystal material is being lifted, Toff needs to be increased to reduce the response time.
- the existing research direction is to neglect the thickness of the liquid crystal cell by minimizing the transmittance of the liquid crystal cell. Panels with short response times and low transmission requirements have a good market prospect, but there is no specific solution.
- embodiments of the present invention provide a display panel and a display device, which reduce the thickness of the display panel, thereby reducing the response time of the liquid crystal.
- an embodiment of the present invention provides a display panel, the display panel includes an array substrate and a color filter substrate formed in a box structure, and a liquid crystal layer is disposed between the array substrate and the color filter substrate;
- the liquid crystal layer has a thickness of 1.5 um to 3 um.
- the liquid crystal layer has a thickness of 1.5 um.
- the surface of the color filter substrate facing the array substrate side includes a plurality of mounting regions for arranging columnar spacers for supporting display panel thickness, and the mounting region includes The groove structure of the column spacer is accommodated.
- the groove structure has a depth of 0.2 um to 0.3 um.
- the color filter substrate comprises a glass substrate, a black matrix, a color filter layer, a common electrode layer, and a liquid crystal molecular alignment layer; wherein the color filter layer has a columnar protrusion.
- the color filter substrate includes a black matrix, a color filter layer, and a reflective layer formed on the array substrate; the black matrix has an opening that limits a sub-pixel region; the color filter layer and the color A reflective layer is located in the sub-pixel region, and the reflective layer is located on a side of the color filter layer adjacent to the array substrate.
- the array substrate includes a substrate, the substrate includes a plurality of light transmissive regions and a plurality of non-transmissive regions;
- the light transmissive area corresponds to a plurality of arrayed pixel electrodes disposed on the base substrate, and the non-transmissive area corresponds to a plurality of arrays of thin film transistors, data lines and gates disposed on the base substrate line;
- the array substrate further includes a transparent common electrode, wherein a thickness of the common electrode at least partially located in the non-transmissive region is greater than a thickness of the common electrode located in the transparent region.
- the array substrate is covered with a flat layer, and the flat layer is provided with an alignment film, wherein the flat layer extends to a non-display area of the array substrate, and the thickness of the flat layer is not Less than the depth of the via located in the non-display area on the array substrate.
- the array substrate includes a gate and a common electrode disposed in the same layer;
- the common electrode and the gate are made of the same material, and the thickness of the common electrode is smaller than the thickness of the gate, and the common electrode is formed with a plurality of slits;
- the pixel electrode and the source drain are made of the same material, and the thickness of the pixel electrode is smaller than the thickness of the source drain, and the pixel electrode is formed. Slots.
- the array substrate includes source and drain electrodes and pixel electrodes disposed in the same layer;
- the pixel electrode and the source drain are made of the same material, and the thickness of the pixel electrode is smaller than the thickness of the source drain, and the pixel electrode is formed. Slots.
- an embodiment of the present invention further provides a display device including the above display panel.
- the display panel and the display device provided by the embodiments of the invention reduce the thickness of the liquid crystal layer, greatly reduce the falling edge time of the display panel, and reduce the response time of the display panel as a whole.
- FIG. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention.
- FIG. 2 is a schematic diagram showing the relationship between optical phase retardation and transmittance in an embodiment of the present invention
- FIG. 3 is a schematic structural view of a color filter substrate according to an embodiment of the present invention.
- FIG. 4 is a schematic structural view of a color filter substrate according to another embodiment of the present invention.
- FIG. 5 is a schematic structural diagram of a color filter substrate according to still another embodiment of the present invention.
- FIG. 6 is a schematic diagram of a planar structure of an array substrate according to an embodiment of the present invention.
- FIG. 7 is a schematic structural diagram of an array substrate according to an embodiment of the present invention.
- FIG. 8 is a schematic structural diagram of an array substrate according to another embodiment of the present invention.
- FIG. 9 is a schematic structural diagram of an array substrate according to still another embodiment of the present invention.
- FIG. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention.
- the display panel includes an array substrate and a color filter substrate formed in a box structure, and a liquid crystal layer is disposed between the array substrate and the color filter substrate; the liquid crystal layer has a thickness of 1.5 um to 3 um.
- the response time is a performance parameter that indicates when the liquid crystal changes from full dark to full bright and then from full bright to full dark.
- the response time is measured by the rising edge time Ton and the falling edge time Toff.
- the rising edge time Ton is the time required for the transmittance to rise from the minimum value to 90% of the maximum value.
- the falling edge time Toff is the time required for the transmittance to fall from the maximum value to 10% of the maximum value.
- the rising edge time of the liquid crystal is mainly calculated by the formula (1).
- Ton represents the rising edge time
- ⁇ 1 represents the liquid crystal rotational viscosity coefficient
- ⁇ 0 represents the dielectric constant in vacuum
- ⁇ ⁇ ⁇ parallel - ⁇ vertical
- ⁇ parallel represents the component of the dielectric constant parallel to the liquid crystal director
- ⁇ vertical A component representing a dielectric constant perpendicular to the liquid crystal director
- E representing an applied electric field strength
- E th 2 representing a threshold electric field.
- the rising edge time of the liquid crystal is mainly calculated by the formula (2).
- Toff represents a falling edge time
- ⁇ 1 represents a liquid crystal rotational viscosity coefficient
- d represents a thickness of the liquid crystal layer
- K 22 represents a twisting elastic constant.
- the direct relationship between the response time of the liquid crystal and the thickness of the liquid crystal layer can be effectively obtained.
- the falling edge time Toff of the liquid crystal can be effectively reduced by lowering the thickness d of the liquid crystal layer.
- the response time when the liquid crystal MAT-995 having different liquid crystal layer thicknesses adopts the FFS mode is simulated by the simulation software TechWiz. It can be seen that if the thickness of the liquid crystal layer is reduced from 2.0 um to 1.5 um, both the rising edge time Ton and the falling edge time Toff are reduced.
- Table 1 LCD response timeline when the thickness of the liquid crystal layer is 2.0 microns and 1.5 microns
- Thickness of liquid crystal layer 2.0um MAT-995 Rising time Ton 10.7ms Falling edge time Toff 3.8ms Response time RT 14.5ms
- Thickness of liquid crystal layer 1.5um MAT-995 Rising time Ton 7.6ms Falling edge time Toff 2.3ms
- T represents the transmittance of the display panel
- d represents the thickness of the liquid crystal layer
- ⁇ is the wavelength
- ⁇ n is the birefringence.
- the present invention provides a display panel including an array substrate and a color filter substrate formed in a box structure, a liquid crystal layer disposed between the array substrate and the color filter substrate, and a thickness of the liquid crystal layer It is 1.5um to 3um.
- a thickness of the liquid crystal layer It is 1.5um to 3um.
- the transmittance continues to decrease.
- the AR (Augmented Reality)/VR (Virtual Reality) field does not require high transmittance for liquid crystal displays, it is necessary to further consider user perception and process characteristics.
- the thickness of the liquid crystal layer is reduced, and the uniformity of the column spacer (Photo Spacer) is deteriorated. Therefore, the embodiment of the present invention selects a liquid crystal layer thickness of 1.5 um. In the embodiment of the present invention, the thickness of the display panel is reduced by the following embodiments.
- the display panel provided by the embodiment of the invention includes a color filter substrate, and the surface of the color film substrate facing the array substrate includes a plurality of mounting regions for arranging column spacers, and the column spacers are used for supporting the thickness of the display panel.
- the area includes a groove structure that is used to accommodate the column spacers.
- the surface of the color filter substrate facing the array substrate includes a plurality of mounting regions for arranging the column spacers 3, and the column spacers 3 are used to support the thickness of the display panel.
- the mounting area includes a groove structure for accommodating the column spacers 3. The plurality of grooves correspond to the position of the column spacer, and the depth of the groove may be 0.2 um to 0.3 um.
- the color filter substrate of the embodiment of the present invention includes the substrate 4.
- a black matrix 2, a color filter unit 1 on a substrate on which a black matrix is formed, and a flat layer 5 on a substrate on which a color filter unit is formed are disposed on a surface of the substrate facing the array substrate.
- the flat layer 5 includes a plurality of groove structures for accommodating the column spacers 3.
- a color filter substrate includes: a glass substrate 1, a black matrix 5, a color filter layer 6-8, a common electrode layer 9, and a liquid crystal molecular alignment layer 11; wherein, the black matrix 5 is formed on the glass substrate 1; the color filter layer has columnar protrusions.
- a color filter layer covers the glass substrate 1 and the black matrix 5.
- the color filter layer includes a red pixel layer 6, a green pixel layer 7, and a blue pixel layer 8; a common electrode layer 9 is formed on the black matrix 5 and the color filter layer; and a liquid crystal molecule alignment layer 11 is formed on the common electrode layer 9.
- a columnar protrusion is prepared on the color pixel photoresist, and the columnar protrusion is used as a column spacer to support the thickness of the display panel between the array substrate and the color filter substrate, and the display is maintained when the liquid crystal panel receives external pressure The thickness of the panel.
- the bonding area between the color pixel photoresist and the underlying glass substrate (referring to the glass substrate forming the color film substrate) and the black matrix photoresist is much larger than the columnar spacers separately prepared in the prior art and the common underneath
- the bonding area between the electrodes; and the bonding between the color pixel photoresist and the underlying glass substrate and the black matrix photoresist is a non-metallic material bonding, and the bonding force is higher than that between the column spacers and the common electrode in the prior art.
- Non-metallic materials have stronger bonding strength with metal materials. Therefore, in the prior art, since the bonding force between the columnar spacer layer and the lower common electrode layer is not strong, the column spacer is likely to cause parallel displacement under the action of external pressure.
- the spacer is made larger and higher in order to ensure the supporting force of the spacer when the spacer is separately manufactured.
- the columnar protrusion on the color film substrate can replace the separately formed spacer material, and the protection is ensured. While the stability of the substrate is confirmed, the column spacer can be further made small and short, and the thickness of the display panel is also reduced.
- the color filter substrate includes a black matrix 2, a color filter layer, and a reflective layer 330 formed on the array substrate; the black matrix has an opening that limits the sub-pixel region; the color filter layer and the reflective layer 330 Located in the sub-pixel region, and the reflective layer 330 is located on a side of the color filter layer adjacent to the array substrate.
- FIG. 5 is a schematic structural diagram of a color filter substrate according to an embodiment of the present invention.
- the color filter array substrate includes: an array substrate 310, and a black matrix 2, a color filter layer 6-8, and a reflective layer 330 disposed on the array substrate 310.
- the black matrix 2 has an opening that limits the sub-pixel region, the color filter layer 6-8 and the reflective layer 330 are located in the sub-pixel region, and the reflective layer 330 is located on the side of the color filter layer 6-8 adjacent to the array substrate 310.
- the sub-pixel region includes at least a red sub-pixel region, a green sub-pixel region, and a blue sub-pixel region.
- the color filter layer also includes at least a red filter layer 6, a green filter layer 7, and a blue filter layer 8. That is, the upper portion of the red sub-pixel region is provided with a red filter layer 6, the upper portion of the green sub-pixel region is provided with a green filter layer 7, and the upper portion of the blue sub-pixel region is provided with a blue filter layer 8.
- a reflective layer 330 is disposed at a lower portion of the red sub-pixel region, the green sub-pixel region, and the blue sub-pixel region.
- the sub-pixel region may further include other sub-pixel regions, such as a transparent color sub-pixel region, a yellow sub-pixel region, and the like.
- corresponding color filter layers can also be set correspondingly.
- the reflective layer is embedded in the sub-pixel region of the black matrix opening (ie, the reflective layer is disposed in the same layer as the black matrix), thereby avoiding the separate reflective layer. The thickness of the reflective liquid crystal panel and the display device can be effectively reduced, which is advantageous for the narrow and thin design of the reflective liquid crystal panel and the display device.
- the thickness of the reflective layer 330 is greater than half the thickness of the color filter layer and less than the thickness of the color filter layer. For example, when the thickness of the color filter layer is 2 ⁇ m, the thickness of the reflective layer 330 is 1 to 2 ⁇ m.
- the display panel provided by the embodiment of the present invention includes an array substrate.
- the array substrate includes a base substrate (not shown) including a light transmitting region and a non-light transmitting region.
- the light transmissive area corresponds to the array of pixel electrodes 21 arranged on the substrate substrate,
- the light transmitting region corresponds to a plurality of arrays of thin film transistors 20, data lines 22, and gate lines 23 on the substrate.
- the array substrate further includes a transparent common electrode 24, wherein a thickness of the common electrode 24 at least partially located in the non-transmissive region of the array substrate is greater than a thickness of the common electrode 24 located in the light-transmitting region of the array substrate.
- the common electrode 24 in the specific embodiment of the present invention is a transparent conductive layer.
- the transparent conductive layer is a single layer film of indium tin oxide (ITO) or indium zinc oxide (IZO) or a composite film of ITO and IZO.
- ITO indium tin oxide
- IZO indium zinc oxide
- a single layer film in which the common electrode is ITO will be described as an example.
- the penetration rate is large.
- the common electrode is disposed in different thicknesses in the light transmitting region and the non-light transmitting region, and the ITO resistance of the common electrode is reduced, and the light transmittance in the light transmitting region is not affected, and the overall display is lowered.
- the thickness of the panel also has a small effect on the transmittance of the display panel.
- an embodiment of the present invention provides an array substrate 10.
- the array substrate 10 of the array substrate 10 is covered with a flat layer 5 on which an alignment film 30 is disposed.
- the flat layer 5 extends to the non-display area of the array substrate 10, and the thickness of the flat layer 5 is not less than the depth of the via holes 110 in the non-display area on the array substrate.
- the metal lines on the array substrate 10 on the non-display area and the via holes 110 are shielded by the flat layer 5, so that the upper surface of the array substrate 10 (with the placement of the array substrate 10 shown in FIG. 7)
- the direction is the reference direction) is a flat plane.
- the orientation liquid is prevented from being affected by the via holes 110 when the alignment layer is formed, and the alignment liquid is relatively uniform in diffusion, which greatly improves the problem of defects occurring around the formed alignment film 30, improves the formation effect of the alignment film 30, and further improves the formation effect. Display the display effect of the device.
- FIG. 8 and FIG. 9 are respectively schematic structural diagrams of an array substrate according to an embodiment of the present invention, which differ in the positional relationship between the common electrode 202 and the pixel electrode 204.
- the array substrate provided by the embodiment of the present invention includes: a gate electrode 201 and a common electrode 202 disposed in the same layer, or a source and drain electrode 203 and a pixel electrode 204 disposed in the same layer.
- the common electrode 202 and the gate electrode 201 are made of the same material, and the thickness of the common electrode 202 is smaller than the thickness of the gate electrode 201, and the common electrode 202 is formed with a plurality of slits, common The transmittance of the electrode 202 is greater than 30%.
- the source When the drain electrode 203 and the pixel electrode 204 are disposed in the same layer, the pixel electrode 204 and the source and drain electrodes 203 are made of the same material, and the thickness of the pixel electrode 204 is smaller than the thickness of the source and drain electrodes 203, and the pixel electrode 204 is formed with a plurality of slits.
- the transmittance of the pixel electrode 204 is greater than 30%.
- the gate electrode and the common electrode are fabricated by the same material, the process difficulty can be reduced, the thickness of the common electrode is smaller than the thickness of the gate electrode, the transmittance of the common electrode is ensured, and the same layer can be further fabricated by a two-tone mask.
- the gate and the common electrode, or the source and drain electrodes of the same layer are fabricated by a two-tone mask, saving a mask, reducing process complexity and process cost.
- the two-tone mask may be a halftone mask or a gray tone mask.
- the embodiment of the invention further provides a display device, which comprises the display panel of any of the above embodiments.
- the display device may be any product or component having a display function, such as a liquid crystal panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
- a display panel By using the above display panel, the display device of the embodiment of the invention is more light and thin, and the volume is more compact; at the same time, the response time of the liquid crystal can be greatly reduced in an application environment where the light transmittance is not required to be high, and the display device is facilitated. Run in a dimly lit environment.
- the display panel and the display device provided by the embodiments of the present invention reduce the thickness of the liquid crystal layer, greatly reduce the falling edge time of the display panel without affecting the transmittance, and reduce the display panel as a whole. Response time, especially in some environments where light transmission is not critical.
- a reference to "A and/or B" when used in connection with an open language means, in one embodiment, only A (optionally including elements other than B) In another embodiment, only B (optionally including elements other than A); in yet another embodiment, both A and B (optionally including other elements);
- At least one of A and B (or, equivalently, “at least one of A or B” or equivalently, “at least one of A and / or B”) is implemented in one implementation
- An example may refer to at least one A, optionally including more than one A, and no B is present (and optionally includes elements other than B); in another embodiment, at least one B, optionally including More than one B, and no A exists (and optionally includes elements other than A); in yet another embodiment, refers to at least one A (optionally including more than one A) and at least one B (optionally Includes more than one B) (and optionally other elements); and so on.
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Abstract
Description
液晶层的厚度:2.0um | MAT-995 |
上升沿时间Ton | 10.7ms |
下降沿时间Toff | 3.8ms |
响应时间RT | 14.5ms |
液晶层的厚度:1.5um | MAT-995 |
上升沿时间Ton | 7.6ms |
下降沿时间Toff | 2.3ms |
响应时间RT | 9.9ms |
Claims (11)
- 一种显示面板,其特征在于,所述显示面板包括形成为对盒结构的阵列基板和彩膜基板,所述阵列基板和彩膜基板之间设置有液晶层;所述液晶层的厚度为1.5um至3um。
- 根据权利要求1所述的显示面板,其特征在于,所述液晶层的厚度为1.5um。
- 根据权利要求1所述的显示面板,其特征在于,所述彩膜基板面向阵列基板侧的表面包括有多个用以设置柱状隔垫物的安装区域;所述柱状隔垫物用以支撑显示面板厚度;所述安装区域包括有用以容置所述柱状隔垫物的凹槽结构。
- 根据权利要求3所述的显示面板,其特征在于,所述凹槽结构的深度为0.2um-0.3um。
- 根据权利要求1所述的显示面板,其特征在于,所述彩膜基板包括玻璃基板、黑矩阵、彩色滤光层、公共电极层、以及液晶分子取向层;所述彩色滤光层具有柱状凸起。
- 根据权利要求1所述的显示面板,其特征在于,所述彩膜基板包括形成于所述阵列基板上的黑矩阵、彩色滤光层和反射层;所述黑矩阵具有限制亚像素区域的开口;所述彩色滤光层和所述反射层位于所述亚像素区域,且所述反射层位于所述彩色滤光层靠近所述阵列基板的一侧。
- 根据权利要求1所述的显示面板,其特征在于,所述阵列基板包括衬底基板,该衬底基板包括多个透光区和多个非透光区;所述多个透光区对应于设置在该衬底基板上的若干阵列排列的像素电极,所述非透光区对应于设置在该衬底基板上的若干阵列排列的薄膜晶体管、数据线和栅极线;所述阵列基板还包括透明的公共电极,其中至少部分位于所述非透光区的所述公共电极的厚度大于位于所述透光区的所述公共电极的厚度。
- 根据权利要求1所述的显示面板,其特征在于,所述阵列基板上覆盖有一层平坦层,所述平坦层上设置有取向膜;所述平坦层延伸 至所述阵列基板的非显示区域,且所述平坦层的厚度不小于位于所述阵列基板上非显示区域中的过孔的深度。
- 根据权利要求1所述的显示面板,其特征在于,所述阵列基板包括设置在同一层的源漏极和像素电极;所述像素电极与所述源漏极使用同一材料制作,且所述像素电极的厚度小于所述源漏极的厚度,所述像素电极形成有多个狭缝。
- 根据权利要求1-9之任一项所述的显示面板,其特征在于,所述阵列基板还包括设置在同一层的栅极和公共电极;所述公共电极与所述栅极使用同一材料制作,且所述公共电极的厚度小于所述栅极的厚度,所述公共电极形成有多个狭缝。
- 一种显示装置,其特征在于,包括如权利要求1至10中任意一项所述的显示面板。
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US15/554,847 US20180107045A1 (en) | 2016-05-17 | 2017-02-07 | Display panel and display device |
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CN201620448701.6U CN205942207U (zh) | 2016-05-17 | 2016-05-17 | 一种显示面板及显示装置 |
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CN107145869A (zh) * | 2017-05-09 | 2017-09-08 | 上海箩箕技术有限公司 | 显示模组 |
CN108363248B (zh) * | 2018-03-08 | 2020-02-07 | 惠科股份有限公司 | 显示面板及其降低电容负载的方法 |
CN109447046B (zh) * | 2018-12-27 | 2021-07-23 | 厦门天马微电子有限公司 | 显示面板和显示装置 |
CN113253528A (zh) * | 2021-05-14 | 2021-08-13 | 绵阳惠科光电科技有限公司 | 阵列基板、反射式显示面板和反射式显示装置 |
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