US 12,442,941 B2
Ray detector substrate and ray detector
Lin Zhou, Beijing (CN)
Assigned to BEIJING BOE SENSOR TECHNOLOGY CO., LTD., Beijing (CN); and BEIJING BOE TECHNOLOGY DEVELOPMENT CO., LTD., Beijing (CN)
Appl. No. 17/907,771
Filed by Beijing BOE Sensor Technology Co., Ltd., Beijing (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Aug. 4, 2021, PCT No. PCT/CN2021/110630
§ 371(c)(1), (2) Date Aug. 29, 2022,
PCT Pub. No. WO2022/062696, PCT Pub. Date Mar. 31, 2022.
Claims priority of application No. 202011014668.3 (CN), filed on Sep. 24, 2020.
Prior Publication US 2023/0115372 A1, Apr. 13, 2023
Int. Cl. G01T 1/20 (2006.01); H10F 39/00 (2025.01); H10F 39/18 (2025.01)
CPC G01T 1/2018 (2013.01) [G01T 1/2002 (2013.01); H10F 39/1898 (2025.01); H10F 39/8067 (2025.01)] 17 Claims
OG exemplary drawing
 
1. A ray detector substrate, comprising:
a substrate;
a plurality of photodetectors located on a side of the substrate and including a plurality of first photodetectors and a plurality of second photodetectors;
a plurality of dimming portions respectively located on sides of the plurality of photodetectors away from the substrate; wherein the plurality of dimming portions include, at a side of each first photodetector away from the substrate, a respective first dimming portion, and, at a side of each second photodetector away from the substrate, a respective second dimming portion;
a first scintillator layer located on a side of the plurality of dimming portions away from the substrate; and
a second scintillator layer located on a side of the first scintillator layer away from the substrate;
wherein the second scintillator layer is configured to convert part of rays incident on the second scintillator layer into a first radiation fluorescence, and to enable another part of the rays to pass through the second scintillator layer toward the first scintillator layer;
the first scintillator layer is configured to convert the another part of the rays passing through the second scintillator layer into a second radiation fluorescence, and to enable the first radiation fluorescence and the second radiation fluorescence to travel to the plurality of dimming portions; an average energy of the part of the rays is less than an average energy of the another part of the rays, and a wavelength of the first radiation fluorescence is greater than a wavelength of the second radiation fluorescence;
the first dimming portion is configured to reflect the second radiation fluorescence, and to enable the first radiation fluorescence to pass through the first dimming portion to be detected by the first photodetector;
the second dimming portion is configured to reflect the first radiation fluorescence, and to enable the second radiation fluorescence to pass through the second dimming portion to be detected by the second photodetector; and
an orthographic projection of an end of each photodetector proximate to a respective dimming portion on the substrate is located within an orthographic projection of the respective dimming portion on the substrate;
wherein each dimming portion includes a first dimming layer and a second dimming layer, wherein
the first dimming layer is closer to the substrate than the second dimming layer; and
a refractive index of the first dimming layer is less than a refractive index of the second dimming layer;
wherein a thickness of a first dimming layer in the first dimming portion is equal to or approximately equal to a thickness of a first dimming layer in the second dimming portion; and
a thickness of a second dimming layer in the first dimming portion is less than a thickness of a second dimming layer in the second dimming portion.