Light detection structure and method thereof, display substrate and display device

Patent metadata

Field	Value
Publication number	US-12553773-B2
Application number	US-202218275017-A
Country	US
Kind code	B2
Filing date	Jul 28, 2022
Priority date	Jul 28, 2022
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

A light detection structure may include a photoelectric conversion device, a current conversion device and a control device; the photoelectric conversion device is electrically connected with the current conversion device, configured to convert an incident light of N colors into current signals, and providing the current signals to the current conversion device under a control of a control signal; the current conversion device is configured to convert the current signals into voltage signals corresponding to the current signals; the control device is electrically connected with the photoelectric conversion device and the current conversion device respectively, and is configured to generate the control signals and generate chromaticity parameters of light according to the voltage signals corresponding to the current signals, wherein the chromaticity parameters include brightness, color temperature and color coordinates.

First claim

The invention claimed is:

1 . A light detection structure comprising: a photoelectric conversion device, a current conversion device, and a control device; wherein
the photoelectric conversion device is electrically connected with the current conversion device, and is configured to:
convert an incident light of N colors into current signals, and
provide the current signals to the current conversion device under a control of a control signal, wherein N is a positive integer greater than or equal to 1;
the current conversion device is configured to convert the current signals into voltage signals corresponding to the current signals; and the control device electrically is connected with the photoelectric conversion device and the current conversion device separately, and is configured to:
generate the control signals, and
generate chromaticity parameters of light according to the voltage signals corresponding to the current signals, wherein the chromaticity parameters comprise brightness, color temperature and color coordinates
when N=4, the photoelectric conversion device comprises: four photoelectric conversion elements; the four photoelectric conversion elements comprise a first photoelectric conversion element, a second photoelectric conversion element, a third photoelectric conversion element and a fourth photoelectric conversion element, and the current signals comprise a first current signal, a second current signal, a third current signal and a fourth current signal; the first photoelectric conversion element is electrically connected with a sense signal terminal and a first node respectively, and is configured to convert the incident light of a first color into a first current signal and write the first current signal into the first node; the second photoelectric conversion element is electrically connected with the sense signal terminal and a second node respectively, and is configured to convert the incident light of a second color into a second current signal and write the second current signal into the second node; the third photoelectric conversion element is electrically connected with the sense signal terminal and a third node respectively, and is configured to convert the incident light of a third color into a third current signal and write the third current signal into the third node; and the fourth photoelectric conversion element is electrically connected with the sense signal terminal and a fourth node respectively, and is configured to convert the incident light of a fourth color into a fourth current signal and write the fourth current signal into the fourth node; and the first color, the second color, the third color and the fourth color are one of red, green, blue and white, and the first color, the second color, the third color and the fourth color are different colors, and a voltage value of a signal at the sense signal terminal is constant; the photoelectric conversion device further comprises: an element selection circuit and a gear selection circuit; the control signal comprises a first element selection signal to a fourth element selection signal and a first gear selection signal to a fourth gear selection signal; the element selection circuit is electrically connected with a first element selection signal terminal to a fourth element selection signal terminal, the first node, the second node, the third node, the fourth node and a fifth node respectively, and is configured to provide a signal of the first node, the second node, the third node or the fourth node to the fifth node in a time-sharing manner under a control of the signals from the first element selection signal terminal to the fourth element selection signal terminal, wherein a signal of the i-th element selection signal terminal is the i-th element selection signal, and i is 1 to 4; and the gear selection circuit is electrically connected with a first gear selection signal terminal to a fourth gear selection signal terminal, the fifth node, a sixth node, a seventh node, an eighth node and a ninth node respectively, and is configured to provide a signal of the fifth node to the sixth node, the seventh node, the eighth node and the ninth node in a time-sharing manner under a control of the signals from the first gear selection signal terminal to the fourth gear selection signal terminal, and a signal of the i-th gear selection signal terminal is the i-th gear selection signal.

2 . The light detection structure according to claim 1 , wherein the first photoelectric conversion element comprises: a first photoelectric sensor, the second photoelectric conversion element comprises: a second photoelectric sensor, the third photoelectric conversion element comprises: a third photoelectric sensor, and the fourth photoelectric conversion element comprises: a fourth photoelectric sensor; wherein
an anode of the first photoelectric sensor is electrically connected with the first node, a cathode of the first photoelectric sensor is electrically connected with the sense signal terminal, an anode of the second photoelectric sensor is electrically connected with the second node, a cathode of the second photoelectric sensor is electrically connected with the sense signal terminal, an anode of the third photoelectric sensor is electrically connected with the third node, a cathode of the third photoelectric sensor is electrically connected with the sense signal terminal, an anode of the fourth photoelectric sensor is electrically connected with the fourth node, and a cathode of the fourth photoelectric sensor is electrically connected with the sense signal terminal; or the cathode of the first photoelectric sensor is electrically connected with the first node, the anode of the first photoelectric sensor is electrically connected with the sense signal terminal, the cathode of the second photoelectric sensor is electrically connected with the second node, the anode of the second photoelectric sensor is electrically connected with the sense signal terminal, the cathode of the third photoelectric sensor is electrically connected with the third node, the anode of the third photoelectric sensor is electrically connected with the sense signal terminal, the cathode of the fourth photoelectric sensor is electrically connected with the fourth node, and the anode of the fourth photoelectric sensor is electrically connected with the sense signal terminal.

3 . The light detection structure according to claim 1 , wherein
when the i-th element selection signal is an effective level signal, all other element selection signals except the i-th element selection signal are dummy level signals, and an end time when the i-th element selection signal is an effective level signal is earlier than or equal to a start time when the (i+1)-th element selection signal is an effective level signal; when the i-th gear selection signal is an effective level signal, all other gear selection signals except the i-th gear selection signal are dummy level signals; and when the i-th element selection signal is an effective level signal, the first gear selection signal to the fourth gear selection signal are sequentially effective level signals, and the duration of the i-th element selection signal being an effective level signal is greater than or equal to the sum of the duration of the first gear selection signal to the fourth gear selection signal being effective level signals.

4 . The light detection structure according to claim 3 , wherein when an end time at which the i-th element selection signal is an effective level signal is earlier than a start time at which the (i+1)-th element selection signal is an effective level signal, an interval time between the end time at which the i-th element selection signal is an effective level signal and the start time at which the (i+1)-th e

Assignees

• Boe Technology Group Co Ltd

Inventors

• Yin Xinshe
• Zhao Hui
• Han Xinbin

Classifications

• G09G5/10

  Intensity circuits · CPC title

• G09G3/20

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title

• G01J3/50 Primary

  using electric radiation detectors · CPC title