WO2018188392A1 - 触控基板及显示面板 - Google Patents
触控基板及显示面板 Download PDFInfo
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- WO2018188392A1 WO2018188392A1 PCT/CN2018/071717 CN2018071717W WO2018188392A1 WO 2018188392 A1 WO2018188392 A1 WO 2018188392A1 CN 2018071717 W CN2018071717 W CN 2018071717W WO 2018188392 A1 WO2018188392 A1 WO 2018188392A1
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- array
- pixel
- touch substrate
- lens
- pixels
- Prior art date
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- 239000000758 substrate Substances 0.000 title claims abstract description 91
- 239000000463 material Substances 0.000 claims description 4
- 229910021421 monocrystalline silicon Inorganic materials 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 56
- 230000003287 optical effect Effects 0.000 description 8
- 239000010408 film Substances 0.000 description 4
- 238000005538 encapsulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000006059 cover glass Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
Images
Classifications
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- 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
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/94—Hardware or software architectures specially adapted for image or video understanding
-
- 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
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/126—Shielding, e.g. light-blocking means over the TFTs
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
- H10K59/65—OLEDs integrated with inorganic image sensors
Definitions
- the present disclosure relates to the field of public display technologies, and specifically discloses a touch substrate and a display panel.
- Fingerprints are invariant features that are inherent in the human body, unique and distinguishable from others.
- the fingerprint consists of a series of ridges and valleys on the surface of the finger skin.
- the compositional details of these ridges and valleys typically include details of the bifurcation of the ridges, the ends of the ridges, the arches, the tented arches, the left-handedness, the right-handedness, the spirals or the doubles, and they determine the uniqueness of the fingerprint pattern.
- the fingerprint recognition technology thus developed was used earlier as personal authentication. Specifically, depending on the fingerprint acquisition or input mode, optical imaging sensors, thermal sensors, human body infrared sensors, and the like are widely used and well known.
- a touch substrate includes: an oppositely disposed pixel array and a light sensing device array; a light shielding layer between the pixel array and the light sensing device array; and a lens array, wherein the lens array is located on a side of the light shielding layer away from the light sensing device array.
- the pixel array includes a plurality of pixel units, wherein each of the pixel units includes a plurality of sub-pixels.
- the lens array includes a plurality of lens units, wherein an orthographic projection of each lens unit on the pixel array is between two adjacent sub-pixels.
- the array of light sensing devices includes a plurality of light sensing devices, wherein the orthographic projection of each of the light sensing devices on the pixel array at least partially overlaps with the orthographic projection of one lens unit on the pixel array.
- a plurality of vias are provided in the light shielding layer, wherein the orthographic projection of each of the vias on the pixel array at least partially overlaps with the orthographic projection of a lens unit on the pixel array.
- the orthographic projection of each lens unit on the pixel array is located between two adjacent pixel units.
- the touch substrate mentioned above further includes a substrate.
- a substrate is located on the side of the light sensing device array adjacent to the light shielding layer.
- the lens array is integrated in the pixel array, and the substrate is located between the light shielding layer and the light sensing device array.
- the pixel array further includes a pixel defining layer for defining a plurality of sub-pixels in each of the pixel units, and each of the sub-pixels includes a first pole, a light emitting layer, and a second pole that are sequentially disposed.
- the first pole is disposed in the same layer as the lens array.
- the pixel defining layer at least partially covers the first pole and completely covers the lens array.
- the lens array is located between the light shielding layer and the pixel array, and the substrate is located between the lens array and the pixel array.
- the pixel array further includes a pixel defining layer for defining a plurality of sub-pixels in each of the pixel units, and each of the sub-pixels includes a first pole, a light emitting layer, and a second pole that are sequentially disposed.
- the first pole is located on a side of the substrate remote from the array of light sensing devices.
- the pixel defining layer at least partially covers the first pole and completely covers the lens array.
- the touch substrate mentioned above further includes a substrate, wherein the substrate is located on a side of the light sensing device array away from the light shielding layer.
- the lens array is located on a side of the pixel array that is remote from the light shielding layer.
- the pixel array further includes a pixel defining layer for defining a plurality of sub-pixels in each of the pixel units, and each of the sub-pixels includes a first pole, a light emitting layer, and a second pole that are sequentially disposed.
- the first pole is located on a side of the light shielding layer away from the array of light sensing devices.
- the pixel defining layer at least partially covers the first pole and completely covers the lens array.
- the light sensing device is made of a single crystal silicon or a PIN material.
- the light shielding layer is made of a metal material.
- a display panel including: the touch substrate described in any of the above embodiments; and a cover plate disposed opposite to the touch substrate.
- the thickness H and the refractive index n 1 of the cover plate, the thickness L of the lens array of the touch substrate, and the refractive index n 2 , and the lens array and the cover plate are set such that the radius of view of the object for field of view of the touch object above the cover is 50 ⁇ m or less.
- the radius r of each via hole is set such that light emitted from the pixel unit is reflected by the edge of the object field of view and refraction in the lens unit The edge of the via leaves away.
- the lateral dimension P of the light sensing device in the plane of extension of the display panel satisfies the following formula:
- L is the thickness of the lens array of the touch substrate
- h is the arch height of the lens unit in the lens array
- d is half the chord length of the lens unit
- r is the radius of the via
- m is the image distance.
- FIG. 1 is a schematic structural view of a touch substrate according to an embodiment of the present disclosure
- FIG. 2 is a schematic structural view of a touch substrate according to another embodiment of the present disclosure.
- FIG. 3 is a schematic structural view of a touch substrate according to still another embodiment of the present disclosure.
- FIG. 4 illustrates a schematic structural view of a display panel according to an embodiment of the present disclosure
- FIG. 5 illustrates a structural relationship diagram of layers in a display panel according to another embodiment of the present disclosure.
- the expression “located between two adjacent sub-pixels” in the present disclosure does not necessarily mean that the area between two adjacent sub-pixels completely coincides. Conversely, the expression “between two adjacent sub-pixels” may mean smaller, larger, or identical than the area between two adjacent sub-pixels.
- the expression "positive projection is located between two adjacent sub-pixels/pixel units” does not necessarily mean each pair of adjacent sub-pixels on the entire touch substrate. There is such an orthographic projection between the pixel units. Conversely, such an expression allows for the possibility that there is no orthographic projection of any lens unit between a certain pair of adjacent sub-pixels/pixel units on the touch substrate.
- the substrate is disposed on the side of the light sensing device array near or away from the light shielding layer as an example in the embodiments of the present disclosure, on the basis of the teachings of the present disclosure, Those skilled in the art will be able to readily conceive, depending on the particular needs, that the substrate be placed in any other suitable location within the entire touch substrate, and that the present disclosure is intended to cover all of these possible aspects.
- the positional setting of the lens array provided in the touch substrate is merely for explaining the principle of the present disclosure, and does not represent any limitation to the present application. That is, the position of the lens array is not limited to being integrated in the pixel array, between the light shielding layer and the pixel array, or on the side of the pixel array away from the light shielding layer, but may be disposed elsewhere in the touch substrate according to specific needs. .
- the touch substrate can form a touch panel having a fingerprint recognition function when disposed opposite to the cover glass 5.
- the touch substrate includes: a lens array 2, a pixel array 1, a light sensing device array 4, and a light shielding layer 3.
- the lens array 2 includes a plurality of lens units 21;
- the pixel array 1 includes a plurality of pixel units 11, wherein an orthographic projection of each lens unit on the pixel array is located between adjacent two pixel units;
- the device array 4 is located below the pixel array 1 and includes a plurality of light sensing devices 41, wherein the orthographic projection of each of the light sensing devices on the pixel array at least partially overlaps with the orthographic projection of a corresponding lens unit on the pixel array;
- the light shielding layer 3 is located on the side of the lens array 2 close to the photosensitive device array 4. Further, a plurality of via holes 31 are provided in the light shielding layer 3, and each of the via holes 31 is provided corresponding to one lens unit 21. That is, the orthographic projection of each via on the pixel array at least partially overlaps the orthographic projection of one lens unit on the pixel array.
- the pixel unit 11 includes an organic electroluminescent diode (OLED).
- OLED organic electroluminescent diode
- the lens unit 21 concentrates the light rays (such as focusing at the edge of the via hole), and then illuminates the light sensing device 41 on the photosensitive device array 4 through the corresponding via holes 31 on the light shielding layer 3.
- the via hole 31 is provided in the light shielding layer 3, the light reflected from the farther region of the finger will be blocked by the light shielding layer 3, so that the through hole 31 cannot be passed. That is to say, the light emitted from the via 31 is only light reflected from a small area of the finger, which limits the field of view. In this way, the fingerprint information received on the fingerprint recognition unit will be more precise, thus facilitating the differentiation of the finger valley and the ridge.
- the light shielding layer 3 is disposed on the side of the pixel array 1 facing away from the display surface, and thus does not affect the aperture ratio of the touch panel.
- each pixel unit 11 in the pixel array 1 includes a plurality of sub-pixels of different colors, wherein each of the sub-pixels has a first pole, a light emitting layer and a second pole.
- the pixel array 1 further includes a substrate 10 and a pixel defining layer. For each pixel, a first pole is above the substrate 10, a pixel defining layer is above the first pole, and a light emitting layer and a second pole are disposed one above the pixel defining layer.
- the lens array 2 is located between the substrate 10 and the first pole in the pixel array 1; the light shielding layer 3 is located between the lens array 2 and the substrate 10; and the light sensing device array 4 is located away from the light shielding layer 3 of the substrate 10.
- One side of each of the vias 31 corresponds to an optical device.
- the lens array 2 is located above the second pole of the sub-pixel of each pixel unit 11; the light shielding layer 3 is located on the substrate 10 and each pixel unit 11 Between the first poles of the sub-pixels; and the light sensing device array 4 is located between the light shielding layer 3 and the substrate 10. At this time, the light sensing device array 4 will be disposed on the substrate 10 of the pixel array 1. Therefore, it is not necessary to prepare the light sensing device 41 on the separate substrate 10, thereby reducing the production cost without increasing the thickness of the touch substrate.
- the lens array 2 is located on the side of the substrate 10 facing away from the first pole; and the light shielding layer 3 is located in the lens array 2 near the light sensing device array 4. On the side.
- the lens array 2 is disposed between the pixel unit 11 of the pixel array 1 and the substrate 10 in order to avoid optical interference of the lens array 2 with light emitted from the pixel unit 11, thereby affecting normal display.
- a light shielding layer 3 having small holes is formed under the lens layer.
- the material of the light shielding layer 3 may be a metal or another light shielding material.
- An optical device is formed directly under the via hole 31.
- the optical device may be a single crystal silicon or a PIN or other optical device, which is not limited herein.
- the pixel unit 11 further includes a thin film transistor connected to the first electrode of the sub-pixel (OLED), and the light shielding layer 3 may also be the same as the gate or source/drain electrode of the thin film transistor.
- an embodiment of the present disclosure also provides a display device.
- the display device includes the touch substrate described in any of the above embodiments, and the cover 5 disposed opposite to the touch substrate.
- the encapsulation layer 6, the polarizer 7 and the optical adhesive layer 8 may be sequentially disposed above the cathodes of the respective sub-pixels (OLED devices) of the touch substrate.
- the encapsulation layer 6 is used to encapsulate the OLED device to prevent external moisture, particles, and the like from contaminating the OLED device.
- the polarizer 7 is used to prevent glare
- an optical adhesive (OCA) layer 8 is used to bond the touch substrate to the cover 5 together.
- the thickness H and the refractive index n 1 of the cover 5 are such that the thickness L and the refractive index n 2 of the lens array 2 of the touch substrate, and the lens array 2 and the cover
- the thickness l and the refractive index n of the portion between the plates 5 are such that the object field of view radius for the touch object above the cover 5 is 50 ⁇ m or less.
- the object field of view radius refers to an angular range that can be entered into the lens unit 21 after the light emitted by the pixel unit 11 (ie, the OLED device) is reflected by the touch object above the cover 5 .
- the spacing portion between the lens array 2 and the cover 5 may be air or may be the sum of the respective film layers between the lens unit 21 and the cover 5 in the touch substrate. It is assumed that the spacer portion is composed of individual film layers, that is, the thickness is the sum of the thicknesses of the respective film layers. In such a case, the refractive index n is an average value or an approximate average value of the refractive indices of the respective film layers.
- the thickness L and the refractive index of the lens array 2 of the touch substrate are n 2 , and between the lens array 2 and the cover 5
- the thickness l and the refractive index n of the spacer portion enable the object field of view radius for the touch object above the cover 5 to be 50 ⁇ m or less. In this way, a more accurate image of the touch object can be obtained.
- the valley and ridge of the finger as an example, if the radius of view of the object side is smaller, the information of the valley and the ridge can be more clearly defined, thereby making the fingerprint detection more precise.
- chord length radius d of the lens unit is a half chord length of the lens unit 21; R is the radius of the lens unit 21; and h represents the arch height of the lens unit 21.
- the radius r of each of the via holes 31 is set such that the light emitted from the pixel unit 11 is reflected by the edge of the object side field and the lens unit 21 After refraction, it can exit from the edge of the via.
- L is the thickness of the lens array of the touch substrate
- h is the arch height of the lens unit in the lens array
- d is half the chord length of the lens unit
- r is the radius of the via
- m is the image distance.
- the light sensing device can accurately detect light reflected from a touch object such as a finger, thereby enabling more accurate fingerprint recognition.
- a lens unit 21.
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Abstract
Description
Claims (22)
- 一种触控基板,包括:相对设置的像素阵列和光感器件阵列;位于所述像素阵列与所述光感器件阵列之间的遮光层;以及透镜阵列,所述透镜阵列位于所述遮光层远离所述光感器件阵列的一侧,其中所述像素阵列包括多个像素单元,其中每一个像素单元包括多个子像素;所述透镜阵列包括多个透镜单元,其中每一个透镜单元在所述像素阵列上的正投影位于两个相邻的子像素之间;所述光感器件阵列包括多个光感器件,其中每一个光感器件在所述像素阵列上的正投影与一个透镜单元在所述像素阵列上的正投影至少部分地重叠;以及所述遮光层中设置有多个过孔,其中每一个过孔在所述像素阵列上的正投影与一个透镜单元在所述像素阵列上的正投影至少部分地重叠。
- 根据权利要求1所述的触控基板,其中每一个透镜单元在所述像素阵列上的正投影位于两个相邻的像素单元之间。
- 根据权利要求1或2所述的触控基板,还包括:基底,所述基底位于所述光感器件阵列靠近所述遮光层的一侧。
- 根据权利要求3所述的触控基板,其中所述透镜阵列集成于所述像素阵列中,并且所述基底位于所述遮光层与所述光感器件阵列之间。
- 根据权利要求4所述的触控基板,其中所述像素阵列还包括用于限定每一个像素单元中的多个子像素的像素限定层,并且每一个子像素包括依次设置的第一极、发光层和第二极。
- 根据权利要求5所述的触控基板,其中所述第一极与所述透镜阵列同层设置。
- 根据权利要求6所述的触控基板,其中所述像素限定层至少部分地覆盖所述第一极并且完全覆盖所述透镜阵列。
- 根据权利要求3所述的触控基板,其中所述透镜阵列位于所述遮光层与所述像素阵列之间,并且所述基底位于所述透镜阵列与所述像素阵列之间。
- 根据权利要求8所述的触控基板,其中所述像素阵列还包括用于限定每一个像素单元中的多个子像素的像素限定层,并且每一个子像素包括依次设置的第一极、发光层和第二极。
- 根据权利要求9所述的触控基板,其中所述第一极位于所述基底远离所述光感器件阵列的一侧。
- 根据权利要求10所述的触控基板,其中所述像素限定层至少部分地覆盖所述第一极并且完全覆盖所述透镜阵列。
- 根据权利要求1或2所述的触控基板,还包括:基底,所述基底位于所述光感器件阵列远离所述遮光层的一侧。
- 根据权利要求12所述的触控基板,其中所述透镜阵列位于所述像素阵列远离所述遮光层的一侧。
- 根据权利要求13所述的触控基板,其中所述像素阵列还包括用于限定每一个像素单元中的多个子像素的像素限定层,并且每一个子像素包括依次设置的第一极、发光层和第二极。
- 根据权利要求14所述的触控基板,其中所述第一极位于所述遮光层远离所述光感器件阵列的一侧。
- 根据权利要求15所述的触控基板,其中所述像素限定层至少部分地覆盖所述第一极并且完全覆盖所述透镜阵列。
- 根据权利要求1或2所述的触控基板,其中所述光感器件由单晶硅或者PIN材料制成。
- 根据权利要求1或2所述的触控基板,其中所述遮光层由金属材料制成。
- 一种显示面板,包括:根据权利要求1-18中任一项所述的触控基板,以及与所述触控基板相对设置的盖板。
- 根据权利要求19所述的显示面板,其中所述盖板的厚度H和折射率n 1、所述触控基板的透镜阵列的厚度L和折射率n 2、以及所述透镜阵列与所述盖板之间的部分的厚度l和折射率n设置成使得用于所述盖板上方的触控物体的物方视场半径小于等于50μm。
- 根据权利要求20所述的显示面板,其中每一个过孔的半径r设置为使得从所述像素单元发出的光在经过物方视场边缘的反射和所述透镜单元中的折射之后从所述过孔的边缘离开。
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US16/080,896 US10957746B2 (en) | 2017-04-13 | 2018-01-08 | Touch substrate and display panel |
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CN201710240413.0A CN106971173B (zh) | 2017-04-13 | 2017-04-13 | 触控基板及显示面板 |
CN201710240413.0 | 2017-04-13 |
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Cited By (1)
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WO2021014250A1 (en) * | 2019-07-23 | 2021-01-28 | 3M Innovative Properties Company | Optical system including microlenses and light-blocking structures |
Families Citing this family (21)
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CN106971173B (zh) * | 2017-04-13 | 2021-01-26 | 京东方科技集团股份有限公司 | 触控基板及显示面板 |
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