Under-screen optical system, design method of diffractive optical element, and electronic device

Abstract

The invention is applicable to the technical field of electronics, and provides an under-screen optical system, a design method of a diffractive optical element, and an electronic device. The under-screen optical system comprises a transparent display screen and a light emitting module, the transparent display screen comprises a plurality of periodically arranged pixel units for display, the lightemitting module comprises a light source and the diffractive optical element and is used for emitting a patterned beam outward through the transparent display screen, the diffractive optical elementis configured to project a first diffractive beam after receiving an incident beam from the light source, and the first diffractive beam is diffracted again after being incident on the transparent display screen, and the patterned beam is projected outward. According to the under-screen optical system provided by the invention, the diffractive optical element of the light emitting module is designed, so that the preset patterned beam is obtained after the twice diffraction of the incident beam from the light source by the diffractive optical element and the display screen, and the imaging quality and effect of the under-screen optical system are improved at a relatively low cost and in a simple mode.

Description

technical field [0001] The invention belongs to the field of electronic technology, and in particular relates to an under-display optical system, a design method of a diffractive optical element and electronic equipment. Background technique [0002] Taking photos and displaying is an essential function of many electronic devices at present. Front cameras and displays are installed on the front of electronic devices to meet various needs, such as Selfie, content display, touch interaction, etc. [0003] As people have higher and higher requirements for the aesthetics of mobile phones, full-screen electronic devices, such as full-screen mobile phones, have gradually become a new direction for mobile phone innovation, because full-screen mobile phones have a very high screen-to-body ratio, are easy to control, and are very aesthetically pleasing visual impact. At present, the challenge faced by full-screen electronic devices is the conflict between the front camera and the di...

AI Technical Summary

Problems solved by technology

At present, the challenge faced by full-screen electronic devices is the conflict between the front camera and the display screen. The existence of the front camera makes it difficult for the display screen to fill the entire front of the phone in a true sense in order to achieve a higher screen-to-body ratio.

[0004] Setting the optical module on the back of the display screen can realize a full screen, and the display screen is located in the front for displaying the picture. The light beam received or emitted by the optical module will pass through the display screen, but since the display screen is composed of multiple horizontal and vertical Multiple pixel units form a periodic pixel diffraction structure, so the display screen will have a diffraction effect on the incident light beam, which will eventually lead to a decrease in the projection or imaging quality of the optical module set on the back of the display screen

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