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Dual-wavelength light emitting device, dual-wavelength optical transmitting and receiving device and display

A light-emitting device, dual-wavelength technology, used in instruments, electrical solid-state devices, semiconductor devices, etc., to achieve the effect of reducing the area

Active Publication Date: 2021-12-24
PIXART IMAGING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, prior art micro-LEDs must use additional area

Method used

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  • Dual-wavelength light emitting device, dual-wavelength optical transmitting and receiving device and display
  • Dual-wavelength light emitting device, dual-wavelength optical transmitting and receiving device and display
  • Dual-wavelength light emitting device, dual-wavelength optical transmitting and receiving device and display

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Embodiment Construction

[0034] In the following description, a number of embodiments are disclosed to illustrate the content of the present invention. Please also note that “first”, “second” .

[0035] A dual-wavelength light-emitting device according to an embodiment of the present invention discloses a dual-wavelength light-emitting device comprising a first light-emitting device and a second light-emitting device. The first light emitting device is used for emitting the first type of light, and the second light emitting device is used for emitting the second type of light. The second light emitting device is stacked above the first light emitting device, and may also be stacked below the first light emitting device. In the following embodiments, the first type of light is infrared light, and the second light emitting device is an R pixel, so the second type of light is red light. However, the first light and the second light are not limited to infrared light and red light. In one embodiment, if...

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Abstract

The invention discloses a dual-wavelength light emitting device, comprising: a first light emitting device for emitting a first type of light; and a second light emitting device for emitting a second type of light; wherein the first light emitting device is stacked on the first light emitting device The second light emitting device is stacked on or under the second light emitting device. With such a device, light emitting devices related to fingerprint detection or touch detection and pixels related to displaying images can be stacked together. In addition, light emitting devices related to fingerprint detection or touch detection can be used to receive light. Therefore, the area occupied by the light-emitting device related to fingerprint detection or touch detection and the pixels related to displaying images can be greatly reduced.

Description

technical field [0001] The present invention relates to a dual-wavelength light-emitting device, a dual-wavelength light-transmitting device and a display, in particular to a dual-wavelength light-emitting device, a dual-wavelength light-transmitting device and a display using these devices, which can reduce the occupied area. Background technique [0002] With the advancement of technology, touch screens that can recognize fingerprints without using independent fingerprint recognition and independent buttons are gradually becoming popular. This type of touch screen can have a micro LED (micro LED) to emit light to the finger on the touch screen, and detect the fingerprint of the finger according to the reflected light of the micro LED. However, such a prior art touch screen must include micro LEDs that emit infrared light, and include infrared light receiving diodes independent of the micro LEDs to receive reflected light of the infrared light. In addition, prior art micro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/08H01L27/15G06K9/00
CPCH01L33/08H01L27/156G06V40/1318H01L27/15H01L25/167G06F3/0421G06F1/3262G06V40/1365H01L31/125H01L33/06G06F3/044H01L33/46H01L31/035236H01L31/173
Inventor 赖鸿庆
Owner PIXART IMAGING INC