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A laser modulation device, a laser light source, a scanning display device and a projection system

A laser modulation and display device technology, applied in projection devices, optics, instruments, etc., to achieve the effects of lower performance requirements, easier implementation, and lower system costs

Active Publication Date: 2022-05-17
CHENGDU IDEALSEE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of this application is to provide a laser modulation device, a laser light source, a scanning display device and a projection system, which are used to solve the problem of ultra-high-speed modulation of the laser during the laser scanning display process

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  • A laser modulation device, a laser light source, a scanning display device and a projection system
  • A laser modulation device, a laser light source, a scanning display device and a projection system
  • A laser modulation device, a laser light source, a scanning display device and a projection system

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Embodiment Construction

[0037] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the related invention are shown in the drawings.

[0038] Traditional display devices require a relatively low display refresh rate for each pixel (synchronized with the frame frequency, generally below 100 Hz), which can be realized by conventional light modulators such as liquid crystals. As mentioned above, compared with traditional displays, in the process of laser scanning display, there is a higher requirement for the light intensity modulation speed of the laser, usually a geometric progression.

[0039] However, the cost of lasers supporting such a high-speed modulation frequency (such as the above-mentio...

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Abstract

The embodiment of the application discloses a laser modulation device, a laser light source, a scanning display device and a projection system. The laser modulation device, laser light source, scanning display device and projection system provided by this application do not modulate the laser itself, but perform high-speed light intensity modulation on the laser transmission path. In this way, the performance of the laser itself Requirements are greatly reduced, the modulation method in this application is easier to implement, and can effectively reduce system cost. Moreover, by branching the laser light emitted by the laser, the requirement for the modulation frequency of each branched optical modulator is reduced, further reducing the cost of components in the system.

Description

technical field [0001] The present application relates to the technical field of laser scanning display, in particular to a laser modulation device, a laser light source, a scanning display device and a projection system. Background technique [0002] Nowadays, laser scanning display technology has become a development hotspot in the display industry due to its high-definition, high-contrast ratio, and easy realization of large-scale display. [0003] During the actual scanning and display, within one frame time, the laser lights up at the position of each pixel in a certain order, forming a spot on the pixel, and the laser spot traverses each pixel at a high enough speed. It is impossible to detect the movement of the light spot. During this period, the gray scale of each pixel point during display can be realized by modulating the output light intensity of the laser, so that a corresponding image can be formed. However, due to the uneven movement speed of the light spot,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/20
CPCG03B21/2033
Inventor 姚长呈宋海涛
Owner CHENGDU IDEALSEE TECH