OLED panel, OLED apparatus, fingerprint identification method and device thereof, and storage medium

Patent metadata

Field	Value
Publication number	US-11009978-B2
Application number	US-201815991085-A
Country	US
Kind code	B2
Filing date	May 29, 2018
Priority date	May 31, 2017
Publication date	May 18, 2021
Grant date	May 18, 2021

Abstract

An OLED panel, apparatus, fingerprint identification method and device are provided in the field of display technology. The OLED panel includes an OLED pixel array comprising a plurality of OLED sub-pixels, and a photoelectric detection circuitry comprising a plurality of photoelectric detectors. The plurality of photoelectric detectors are respectively disposed between the plurality of OLED sub-pixels. At least one of the plurality of photoelectric detectors is configured to detect light rays whose wavelength ranges are outside of wavelength ranges of light rays emitted from the OLED sub-pixels adjacent to the photoelectric detector. The present disclosure may perform the fingerprint identification only with the display area of the OLED panel, such that the occupancy area of the screen on the OLED panel is increased, thereby increasing the screen ratio and improving the display performance.

First claim

What is claimed is:

1. An organic light-emitting diode (OLED) panel, comprising:
an OLED pixel array including a plurality of OLED sub-pixels configured to emit light rays of M different wavelength ranges, wherein M is a natural number not less than 3; and
a photoelectric detection circuitry including a plurality of photoelectric detectors configured to detect the light rays of M different wavelength ranges;
wherein the plurality of photoelectric detectors are respectively disposed between the plurality of OLED sub-pixels;
wherein at least one of the plurality of photoelectric detectors is configured to detect light rays whose wavelength ranges are outside of wavelength ranges of light rays emitted from the plurality of OLED sub-pixels adjacent to the photoelectric detector such that the at least one of the plurality of photoelectric detectors is protected from interference from the light rays emitted from the adjacent OLED sub-pixels, wherein the plurality of OLED sub-pixels comprise a G sub-pixel, a B sub-pixel and an R sub-pixel, and wherein at least one of the plurality of photoelectric detectors is between the R sub-pixel and the G sub-pixel and is adjacent to the R sub-pixel and the G sub-pixel and is configured to detect blue light, at least one of the plurality of photoelectric detectors is between the R sub-pixel and the B sub-pixel and is adjacent to the R sub-pixel and the B sub-pixel and is configured to detect green light, and, at least one of the plurality of photoelectric detectors is between the G sub-pixel and the B sub-pixel and is adjacent to the G sub-pixel and the B sub-pixel and is configured to detect red light.

2. The OLED panel of claim 1 , wherein the photoelectric detection circuitry is configured to form a portion of a detection circuit of a photoelectric biometric sensor.

3. The OLED panel of claim 2 , wherein the photoelectric biometric sensor is a fingerprint sensor or a palm print sensor.

4. The OLED panel of claim 3 , wherein the fingerprint sensor is configured to simultaneously identify fingerprints of at least two fingers.

5. The OLED panel of claim 1 , wherein the plurality of photoelectric detectors are respectively disposed at gaps between the plurality of OLED sub-pixels.

6. The OLED panel of claim 1 , wherein the plurality of photoelectric detectors are respectively disposed on black matrixes between the plurality of OLED sub-pixels.

7. An organic light-emitting diode (OLED) apparatus, comprising an OLED panel and a drive circuit;
wherein the OLED panel includes:
an OLED pixel array including a plurality of OLED sub-pixels configured to emit light rays of M different wavelength ranges, wherein the M is a natural number not less than 3; and
a photoelectric detection circuitry including a plurality of photoelectric detectors to detect the light rays of M different wavelength ranges;
wherein the plurality of photoelectric detectors are respectively disposed between the plurality of OLED sub-pixels;
wherein at least one of the plurality of photoelectric detectors is configured to detect light rays whose wavelength ranges are outside of wavelength ranges of light rays emitted from the plurality of OLED sub-pixels adjacent to the photoelectric detector such that the at least one of the plurality of photoelectric detectors is protected from interference from the light rays emitted from the adjacent OLED sub-pixels,
wherein the plurality of OLED sub-pixels comprise a G sub-pixel, a B sub-pixel and an R sub-pixel, and wherein at least one of the plurality of designated photoelectric detectors is between the R sub-pixel and the G sub-pixel and is adjacent to the R sub-pixel and the G sub-pixel and is configured to detect blue light, at least one of the plurality of photoelectric detectors is between the R sub-pixel and the B sub-pixel and is adjacent to the R sub-pixel and the B sub-pixel and is configured to detect green light, and, at least one of the plurality of photoelectric detectors is between the G sub-pixel and the B sub-pixel and is adjacent to the G sub-pixel and the B sub-pixel and is configured to detect red light; and
wherein the drive circuit is configured to:
identify, in response to a touch operation for fingerprint identification, a location of a touch area being touched;
enable, based on the location of the touch area, a plurality of OLED sub-pixels to emit light rays;
select, based on the location of the touch area, a plurality of designated photoelectric detectors from the plurality of photoelectric detectors; and
detect reflected light of the light rays with the plurality of designated photoelectric detectors; and
generate a fingerprint image based on positions of the plurality of designated photoelectric detectors and intensities of the reflected light detected by the plurality of designated photoelectric detectors.

8. The OLED apparatus of claim 7 , wherein the drive circuit is configured to:
select all of the plurality of photoelectric detectors as the designated photoelectric detectors; or,
select the photoelectric detectors located in the touch area among the plurality of photoelectric detectors as the designated photoelectric detectors.

9. The OLED apparatus of claim 8 , wherein the drive circuit is configured to:
determine a ridge line position in the fingerprint image corresponding to the position of the designated photoelectric detector, for each of the plurality of designated photoelectric detectors, when the intensity of the reflected light detected by the designated photoelectric detector is within a first preset intensity range, wherein the ridge line is formed by a protruding portion on a fingerprint epidermis; and
determine, when the intensity of the reflected light detected by the designated photoelectric detector is within a second preset intensity range, a valley line position in the fingerprint image corresponding to the position of the designated photoelectric detector, wherein the valley line is formed by a recessed portion on the fingerprint epidermis.

10. The OLED apparatus of claim 7 , wherein the drive circuit is configured to:
determine a ridge line position in the fingerprint image corresponding to the position of the designated photoelectric detector, for each of the plurality of designated photoelectric detectors, when the intensity of the reflected light detected by the designated photoelectric detector is within a first preset intensity range, wherein the ridge line is formed by a protruding portion on a fingerprint epidermis; and
determine, when the intensity of the reflected light detected by the designated photoelectric detector is within a second preset intensity range, a valley line position in the fingerprint image corresponding to the position of the designated photoelectric detector, wherein the valley line is formed by a recessed portion on the fingerprint epidermis.

11. A fingerprint identification method applied to a terminal provided with an organic light-emitting diode (OLED) panel, wherein the OLED panel includes:
an OLED pixel array including a plurality of OLED sub-pixels configured to emit light rays of M different wavelength ranges, wherein the M is a natural number not less than 3; and
a photoelectric detection circuitry including a plurality of photoelectric detectors configured to detect the light rays of M different wavelength ranges;
wherein the plurality of photoelectric detectors are respectively disposed between the plurality of OLED sub-pixels;
wherein at least one of the plurality of photoelectric detectors is configured to detect light rays whose wavelength ranges are outside of wavelength ranges of light rays emitted from the plurality of OLED sub-pixels adjacent

Assignees

• Beijing Xiaomi Mobile Software Co Ltd

Inventors

• He Quanhua

Classifications

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• G06V40/1318 Primary

  using electro-optical elements or layers, e.g. electroluminescent sensing · CPC title

• G09G3/3208

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• H01L27/323

  Electricity · mapped topic