WO2018153065A1 - 一种显示装置 - Google Patents
一种显示装置 Download PDFInfo
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- WO2018153065A1 WO2018153065A1 PCT/CN2017/101699 CN2017101699W WO2018153065A1 WO 2018153065 A1 WO2018153065 A1 WO 2018153065A1 CN 2017101699 W CN2017101699 W CN 2017101699W WO 2018153065 A1 WO2018153065 A1 WO 2018153065A1
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- Prior art keywords
- light
- filter
- display device
- region
- filter structure
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
Definitions
- the present invention relates to the field of display technologies, and in particular, to a display device.
- devices for implementing the texture recognition function such as a mobile phone are installed in a non-display area such as a home button or a display device, and the future development direction of the display device is ultra-thin, high color gamut, wide viewing angle and integrated.
- Various sensing functions When the optical sensor (Sensor) that realizes the texture recognition is integrated inside the display panel, the distance between the Sensor and the finger contact surface is enlarged, causing the distance of the reflected light of the finger to reach the Sensor to become larger, and the light reflected by the finger is reached. Scattering occurs before the Sensor, as shown in Figure 1, so that a single optical Sensor 01 receives fingerprint information of multiple valleys, resulting in blurred optical fingerprint patterns, which reduces the accuracy of texture recognition.
- a filter structure 02 may be added between the Sensor and the finger contact surface to form a collimating effect on the light reflected from the finger in the optical fingerprint recognition, and absorb and filter out the interference reflection.
- the light, transmitted through the filtered light structure is incident almost perpendicularly to Sensor 01.
- the filter structure includes a light shielding region and a light transmission region, wherein the light transmission region may be a hole, a groove or a light transmissive material.
- the light-transmitting region is a hole
- the aspect ratio (pore height/aperture) of the hole is a certain value to achieve high-performance collimation.
- the aspect ratio of the hole is preferably 6:1.
- the embodiment of the invention provides a display device for solving the problem that the area of the light-transmitting region in the prior filter structure cannot be made small due to the limitation of the process precision.
- an embodiment of the present invention provides a display device including: a display panel having a plurality of pixel units, a protective cover disposed on a light emitting surface of the display panel, and a texture layer disposed under the protective cover a plurality of photosensitive devices identified, and a plurality of filter structures disposed between the protective cover and the plurality of photosensitive devices;
- the orthographic projection of the photosensitive device and the pixel unit on the display panel does not overlap each other;
- the filter structure includes a plurality of filter layers disposed in a stack, each of the filter layers having a light-transmitting region and a light-shielding region outside the light-transmitting region, the light-transmitting of each of the filter layers
- the central position of the region is at least partially offset, and the orthographic projection of the light transmissive region of each of the filter layers on the display panel has an overlap region smaller than the light transmissive regions of each of the filter layers.
- a center position of each of the two light-transmissive regions of the adjacent filter layers is misaligned with each other .
- the light transmissive area of each adjacent two of the filter layers is on the display panel
- the orthographic projections on the top only partially overlap.
- At least a portion of the light transmissive region of the filter layer is filled with a transparent material.
- the transparent material is a transparent conductive oxide material or a transparent organic material.
- At least a portion of the light transmissive region of the filter layer is a hollow region.
- the material of the filter layer is a material that is opaque or semi-transparent.
- the material of the filter layer is a metal material or a black matrix material.
- each of the filter layers in the filter structure has an overlap ratio of 6:1.
- each of the filter layers in the filter structure is in contact with each other.
- the shape of the transparent region of each of the filter layers is one of a circle, a triangle, a rectangle, a diamond, and a polygon. .
- the photosensitive device is disposed on a side of the pixel unit facing away from the light emitting surface, or the photosensitive device is disposed on the One side of the light emitting surface of the pixel unit is located inside the display panel, or the photosensitive device is disposed between the display panel and the protective cover.
- the photosensitive device and the filter structure are disposed in a non-light emitting region of the display area of the display panel;
- the filter structure is disposed corresponding to at least one of the photosensitive devices.
- a display device changes a filter structure disposed between a protective cover plate and a plurality of photosensitive devices to a plurality of filter layers disposed in a stack, and the filter structure is in the process of optical fingerprint recognition.
- the collimated action is formed on the reflected light from the finger to absorb the reflected light that filters out the interference.
- Each of the filter layers has a light-transmitting region and a light-shielding region outside the light-transmitting region, and the central position of the light-transmitting region of each of the filter layers is at least partially offset, so that the light-transmitting regions of the respective filter layers are on the display panel.
- the orthographic projection has an overlapping area, and the area of the overlapping area is the light transmitting area of the filter structure.
- the light-transmitting area of the filter structure can be reduced as needed, so that the filter structure is not affected by the precision of the manufacturing equipment, and the precision of the optical fingerprint recognition is improved.
- the light transmission area of the filter structure can be reduced as needed to ensure the collimation effect while preventing the filter structure from being too thick to affect the thickness of the display device.
- FIG. 1 is a schematic structural view of a display device in the prior art
- FIG. 2 is a schematic structural view of a display device having a filter structure
- 3a to 3c are respectively schematic structural views of a display device according to an embodiment of the present invention.
- FIGS. 4a to 4d are schematic structural views of a filter structure in a display device according to an embodiment of the present invention.
- FIG. 5 is a schematic structural diagram of a filter structure in a display device according to an embodiment of the present invention.
- FIG. 6 is a schematic structural view showing the shape of a light-transmitting region of each filter layer of the filter structure in the display device according to an embodiment of the invention.
- each layer of the film and the shape and size of the regions in the drawings do not reflect the true scale of the device, and are merely intended to illustrate the present invention.
- the embodiment of the present invention provides a display device, as shown in FIG. 3a to FIG. 3c, comprising: a display panel having a plurality of pixel units 100, and a protective cover 200 disposed on the light emitting surface of the display panel, disposed on the protective cover a plurality of photosensitive devices 300 for pattern recognition under 200, and a plurality of filter structures 400 disposed between the protective cover 200 and the plurality of photosensitive devices 300; wherein
- the orthographic projection of the photosensitive device 300 and the pixel unit 100 on the display panel does not overlap each other;
- the filter structure 400 includes a plurality of filter layers 401 stacked in a stack, each of the filter layers 401 having a light-transmitting region A and a light-shielding region B outside the light-transmitting region A, and a light-transmitting region A of each of the filter layers 401
- the center position is at least partially offset, and the orthographic projection of the light transmissive area A of each filter layer 401 on the display panel has an overlap area C smaller than the light transmissive area A of each filter layer 401.
- the number of layers of the filter layer 401 constituting the filter structure 400 may be set according to actual needs, for example, two layers, three layers, or more, where Not limited.
- the relative hierarchical positional relationship between the photosensitive device 300 and the pixel unit 100 is not limited.
- the photosensitive device 300 may be disposed in the pixel unit. 100 is away from the side of the light surface, or, as shown in Figure 3b, The photosensitive device 300 can also be disposed on the light emitting surface side of the pixel unit 100 and located inside the display panel.
- the photosensitive device 300 can also be disposed between the display panel and the protective cover 200.
- the filter structure 400 disposed between the protective cover 200 and the plurality of photosensitive devices 300 is changed to be composed of a plurality of filter layers 401 disposed in a stacked manner.
- the filter structure 400 forms a collimating effect on the reflected light from the finger during optical fingerprinting to absorb the reflected light that filters out the interference.
- the central position of the light-transmitting area A of each of the filter layers 401 is at least partially offset, such that the orthographic projection of the light-transmitting area A of each of the filter layers 401 on the display panel has an overlapping area C, and the area of the overlapping area C is It is smaller than the area of the light-transmitting area A in each of the filter layers 401, and the area of the overlap area C is the light-transmitting area of the filter structure 400.
- the photosensitive device 300 may be integrated into the display area of the display panel. At this time, the photosensitive device 300 and the filter are filtered.
- the structure 400 is generally disposed in a non-light emitting region of the display panel display area, that is, at a gap between the pixel units 100 as shown in FIGS. 3a to 3c.
- the filter structure 400 can be disposed corresponding to the at least one photosensitive device 300.
- one filter structure 400 in FIGS. 3a to 3c can be in one-to-one correspondence with one photosensitive device 300.
- one filter structure 400 It can also be in one-to-one correspondence with a plurality of photosensitive devices 300, which is not limited herein.
- each of the filter layers 401 in the filter structure 400 has an overlap ratio (hole height/aperture) h:d of 6:1.
- the filter structure 400 in order to facilitate fabrication and achieve better collimation, as shown in FIG. 4a to FIG. 4d, the filter structure 400 is
- the respective filter layers 401 are generally in contact with each other, that is, no other film layers are generally disposed between the adjacent two filter layers 401.
- the center positions of the light-transmitting regions A of each of the two adjacent filter layers 401 are generally offset from each other.
- the center positions of the light-transmitting regions A of the two filter layers 401 disposed at intervals may be overlapped, which is not limited herein.
- the filter structure 400 in order to ensure that the area of the overlapping area C of the light-transmitting area A of each filter layer 401 on the display panel has an area smaller than each The area of the light-transmitting area A, as shown in FIG. 4a to FIG. 4d, in the filter structure 400, the orthographic projection of the light-transmitting area A of each adjacent two filter layers 401 on the display panel only partially overlaps, It is ensured that the area of the overlapping area of the light-transmitting area A of each of the two adjacent filter layers 401 is smaller than the area of one of the light-transmitting areas A.
- the transparent material 402 may be filled in the light-transmitting region A of at least a portion of the filter layer 401.
- the filter structure 400 is configured by using the four-layer filter layer 401.
- the transparent material 402 can be filled in the transparent region A of the four-layer filter layer 401, and the transparent material 402 is disposed on each layer.
- the surface is flush with the upper surface of the corresponding filter layer 401, that is, the thickness of both is the same.
- the transparent material 402 may be formed first, and then the corresponding filter layer 401 may be formed.
- the filter layer 401 may be formed first, and then the corresponding transparent material 402 may be formed, which is not limited herein.
- the order of fabrication of the filter layers 401 of the respective layers may be the same or may not be uniform, and is not limited herein.
- the transparent structure 402 can be filled in the light-transmitting region A of any one of the filter layers 401 by taking the filter structure 400 using the two filter layers 401 as an example.
- the transparent material 402 is filled in the light-transmitting region A of the lower filter layer 401, and the transparent material is The upper surface of the material 402 is flush with the upper surface of the lower filter layer 401, that is, the thickness of both is the same.
- the transparent material 402 may be formed first, and then the corresponding filter layer 401 may be formed.
- the filter layer 401 may be formed first, and then the corresponding transparent material 402 may be formed, which is not limited herein.
- the transparent material 402 is filled in the transparent region A of the upper filter layer 401, and the upper surface of the transparent material 402 is flush with the upper surface of the upper filter layer 401, that is, the transparent material 402.
- the thickness is consistent with the thickness of the two filter layers 401.
- the filter layer 401 needs to be formed first, and then the corresponding transparent material 402 is produced.
- the transparent material 402 may specifically be a transparent conductive oxide material or a transparent organic material.
- the filter structure 400 in order to simplify the manufacturing process of the filter structure 400, as shown in FIG. 4b and FIG. 4d, at least a portion of the light transmitting region of the filter layer 401 may be A is set to a cutout area, that is, the light transmission area A is a via hole.
- the filter structure 400 is configured by using two filter layers 401, and the light-transmitting regions A of the two filter layers 401 are hollow regions.
- the lower filter layer 401 can be fabricated first, and then lithographically and etched to form a via hole, that is, a hollow region, the diameter of the hole is D1.
- the minimum size of the hole is constrained, for example, the minimum aperture can only be 3 ⁇ m.
- the upper filter layer 401 is formed on the basis of the lower filter layer 401, and then photolithographically etched and formed.
- a via having a diameter of D2 is a hollowed out area.
- the material of the filter layer 401 is a material that is opaque or semi-transparent.
- the material of the filter layer 401 generally needs to use an opaque material, and generally does not block the light emission of the pixel unit 100 in order not to affect the normal display.
- the material of the filter layer 401 is generally selected from a semi-transmissive material to absorb corresponding infrared light.
- it may be an organic material or an inorganic material, which is not limited herein.
- the material of the filter layer 401 may specifically be a metal material such as copper Cu or a black matrix material. And, the material of each layer of the filter layer 401 They may be the same or different, and are not limited herein.
- each filter layer 401 may be the same or different, for example, each filter.
- the shape of the light-transmitting area A of the light layer 401 may be a circle, a triangle, or one or a combination of a rectangle, a diamond, a polygon, as shown in FIG. 6c and FIG. 6b, which is not limited herein.
- the foregoing display device may be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, etc., which is not limited herein. .
- the filter structure disposed between the protective cover and the plurality of photosensitive devices is changed to be composed of a plurality of filter layers arranged in a stack, and the filter structure is in the process of optical fingerprint recognition.
- a collimating effect is formed on the reflected light from the finger to absorb the reflected light that filters out the interference.
- Each of the filter layers has a light-transmitting region and a light-shielding region outside the light-transmitting region, and the central position of the light-transmitting region of each of the filter layers is at least partially offset, so that the light-transmitting regions of the respective filter layers are on the display panel.
- the orthographic projection has an overlapping area, and the area of the overlapping area is the light transmitting area of the filter structure.
- the light-transmitting area of the filter structure can be reduced as needed, so that the filter structure is not affected by the precision of the manufacturing equipment, and the precision of the optical fingerprint recognition is improved.
- the light transmission area of the filter structure can be reduced as needed to ensure the collimation effect while preventing the filter structure from being too thick to affect the thickness of the display device.
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Abstract
Description
Claims (14)
- 一种显示装置,其特征在于,包括:具有多个像素单元的显示面板,设置于所述显示面板的出光面的保护盖板,设置于所述保护盖板下方的用于纹路识别的多个感光器件,以及设置于所述保护盖板与所述多个感光器件之间的多个滤光结构;其中,所述感光器件与所述像素单元在所述显示面板上的正投影互不重叠;所述滤光结构包括层叠设置的多个滤光层,每个所述滤光层具有透光区域和在所述透光区域之外的遮光区域,各所述滤光层的所述透光区域的中心位置至少部分错位,且各所述滤光层的所述透光区域在所述显示面板上的正投影具有的交叠区域小于各所述滤光层的所述透光区域。
- 如权利要求1所述的显示装置,其特征在于,至少一个所述感光器件在显示面板上的正投影覆盖一个所述滤光结构的一个透光区域在显示面板上的正投影。
- 如权利要求1-2任一项所述的显示装置,其特征在于,在所述滤光结构中,每相邻两个所述滤光层的所述透光区域的中心位置相互错位。
- 如权利要求3所述的显示装置,其特征在于,在所述滤光结构中,每相邻两个所述滤光层的所述透光区域在所述显示面板上的正投影仅部分交叠。
- 如权利要求1所述的显示装置,其特征在于,在至少部分所述滤光层的所述透光区域内填充有透明材料。
- 如权利要求5所述的显示装置,其特征在于,所述透明材料为透明导电氧化物材料或透明有机材料。
- 如权利要求1所述的显示装置,其特征在于,至少部分所述滤光层的所述透光区域为镂空区域。
- 如权利要求1所述的显示装置,其特征在于,所述滤光层的材料为不透光或半透光的材料。
- 如权利要求8所述的显示装置,其特征在于,所述滤光层的材料为金属材料或黑矩阵材料。
- 如权利要求1所述的显示装置,其特征在于,所述滤光结构中各所述滤光层具有的所述交叠区域的纵横比为6:1。
- 如权利要求1所述的显示装置,其特征在于,所述滤光结构中的各所述滤光层之间相互接触。
- 如权利要求1所述的显示装置,其特征在于,各所述滤光层的所述透光区域的形状为圆形、三角形、矩形、菱形、多边形之一或组合。
- 如权利要求1-12任一项所述的显示装置,其特征在于,所述感光器件设置于所述像素单元背离所述出光面的一侧,或,所述感光器件设置于所述像素单元的出光面一侧且位于所述显示面板内部,或,所述感光器件设置于所述显示面板与所述保护盖板之间。
- 如权利要求1-11任一项所述的显示装置,其特征在于,所述感光器件和所述滤光结构设置于所述显示面板显示区的非发光区域。
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US15/959,731 US10656764B2 (en) | 2017-02-23 | 2018-04-23 | Touch device and display device |
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CN201710099959.9A CN106873063B (zh) | 2017-02-23 | 2017-02-23 | 一种显示装置 |
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