Texture recognition device and driving method of texture recognition device

Patent metadata

Field	Value
Publication number	US-11301707-B2
Application number	US-201916764143-A
Country	US
Kind code	B2
Filing date	Apr 30, 2019
Priority date	Apr 30, 2019
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

A texture recognition device and a driving method of a texture recognition device (100) are provided. The texture recognition device has a touch side, and includes: a light source array, an image sensor array and a light valve structure; the image sensor array is configured to receive light emitted from the light source array and then reflected to the image sensor array by a texture for a texture image collection; the light valve structure is disposed on a side of the light source array close to a touch side and is configured to control a first region to be in a light transmission state in response to a control signal, so as to allow light emitted from the light source array to pass through the first region to form a first photosensitive light source in the light transmission state.

First claim

What is claimed is:

1. A texture recognition device, having a touch side, and comprising:
a light source array;
an image sensor array configured to receive light emitted from the light source array and then reflected to the image sensor array by a texture for a texture collection; and
a light valve structure which is on a side, close to the touch side, of the light source array and is configured to control a first region to be in a light transmission state in response to a control signal, so as to allow light emitted from the light source array to pass through the first region in the light transmission state to form a first photosensitive light source;
wherein the light valve structure is further configured to control a second region different from the first region to be in a light transmission state to allow light emitted from the light source array to pass through the second region in the light transmission state to form a second photosensitive light source, and is configured to allow the first region and the second region to be in the light transmission state at different time.

2. The texture recognition device according to claim 1 , wherein the light valve structure comprises a liquid crystal panel,
the liquid crystal panel comprises an array substrate, an opposite substrate, and a liquid crystal layer between the array substrate and the opposite substrate, the liquid crystal panel comprises a pixel array, the pixel array comprises a plurality of pixel units, the control signal comprises a scanning signal and a data signal, each of the pixel units comprises at least one sub-pixel unit, and each sub-pixel unit is configured to control a light transmission state in a pixel region corresponding to the sub-pixel unit according to the scanning signal and the data signal.

3. The texture recognition device according to claim 2 , wherein the image sensor array comprises a plurality of image sensors, and the plurality of image sensors are in the array substrate of the liquid crystal panel;
each of the plurality of image sensors is between two adjacent rows of the pixel units, or each of the plurality of image sensors is in the pixel units; or
each of the plurality of image sensors is between adjacent sub-pixel units, or each of the plurality of image sensors is in the sub-pixel units.

4. The texture recognition device according to claim 3 , wherein each of the pixel units comprises a red sub-pixel unit, a green sub-pixel unit, and a blue sub-pixel unit, and each of the image sensors is between blue sub-pixel units respectively of adjacent pixel units.

5. The texture recognition device according to claim 3 , wherein each of the sub-pixel units comprises a first switch component to receive the scanning signal and the data signal, and each of the image sensors comprises a photosensitive component and a second switch component;
the pixel array comprises a first sub-pixel unit, the image sensor array comprises a first image sensor, the first sub-pixel unit and the first image sensor are adjacent to each other, and the second switch component of the first image sensor is at least partially in a same layer as the first switch component of the first sub-pixel unit.

6. The texture recognition device according to claim 5 , wherein the photosensitive component of the first image sensor comprises a first electrode and a lead line electrically connected to the first electrode, the first sub-pixel unit comprises a first pixel electrode electrically connected to the first switch component;
the first electrode is in a same layer as the first pixel electrode, or
the lead line electrically connected to the first electrode is in a same layer as the first pixel electrode.

7. The texture recognition device according to claim 6 , wherein the array substrate further comprises a base substrate, and an orthographic projection of the photosensitive component of the first image sensor on the base substrate at least partially overlaps with an orthographic projection of the second switch component of the first image sensor on the base substrate.

8. The texture recognition device according to claim 7 , wherein the orthographic projection of the photosensitive component of the first image sensor on the base substrate further at least partially overlaps with an orthographic projection of the first switch component of the first sub-pixel unit on the base substrate.

9. The texture recognition device according to claim 6 , further comprising a touch structure, wherein the touch structure comprises a touch electrode, the first sub-pixel unit further comprises a first common electrode, and
the first common electrode also serves as the touch electrode.

10. The texture recognition device according to claim 9 , wherein the first image sensor further comprises a signal readout line electrically connected to the second switch component, the touch structure further comprises a touch lead line electrically connected to the touch electrode;
the signal readout line also serves as the touch lead line, or
an orthographic projection of the signal readout line on the base substrate at least partially overlaps with an orthographic projection of the touch lead line on the base substrate.

11. The texture recognition device according to claim 10 , wherein where the signal readout line also serves as the touch lead line, the touch structure further comprises a third switch component, and the touch electrode is electrically connected to the touch lead line through the third switch component.

12. The texture recognition device according to claim 1 , wherein a size of the second region is equal to a size of the first region,
a first imaging range of the first photosensitive light source on the image sensor array is in a first ring shape, a second imaging range of the second photosensitive light source on the image sensor array is in a second ring shape,
the first ring shape has only two intersection points with the second ring shape, and two closest points respectively on an inner circle of the first ring shape and an inner circle of the second ring shape are a first point and a second point, and an imaging range in a rectangle shape formed by four sides is used for imaging the texture, taking the two intersection points, the first point and the second point as midpoints of the four sides respectively, or
an imaging range formed in a range covered by either of the first ring shape and the second ring shape is used for imaging the texture.

13. The texture recognition device according to claim 2 , wherein the opposite substrate comprises a black matrix layer, the black matrix layer comprises a plurality of first black matrix regions exposing a plurality of sub-pixel units and a plurality of second black matrix regions exposing a plurality of image sensors,
a first light filter pattern is provided in each of the first black matrix regions, the first light filter pattern is configured to form monochromatic light,
a second light filter pattern is provided in each of the second black matrix regions, and the second light filter pattern is configured to filter the light emitted from the light source array and then reflected to the image sensor array by the texture.

14. The texture recognition device according to claim 13 , wherein the second light filter pattern is configured to absorb light with a wavelength range of 600 nm to 900 nm.

15. The texture recognition device according to claim 1 , further comprising a controller, wherein the controller is configured to determine a position of the first region according to a touch position of the texture on the touch side, and

Assignees

• Boe Technology Group Co Ltd

Inventors

• Wang Haisheng
• Dong Xue
• Wang Lei
• Ding Xiaoliang
• Liu Yingming

Classifications

• G06V10/54

  relating to texture · CPC title

• G06V40/1347

  Preprocessing; Feature extraction · CPC title

• G06V10/40

  Extraction of image or video features · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06V10/147

  Details of sensors, e.g. sensor lenses (fingerprint or palmprint sensors G06V40/13; vascular sensors G06V40/145; eye sensors G06V40/19) · CPC title