Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Three-color laser projection equipment

A technology of laser projection and equipment, which is applied in the field of projection display, can solve the problems of poor image display quality of laser projection equipment and permanent damage to lasers, etc., and achieve the effects of eliminating COD failures, ensuring image display effects, and reducing damage rates

Active Publication Date: 2021-07-30
QINGDAO HISENSE LASER DISPLAY CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present disclosure provides a laser projection device, which can solve the problems in the related art that the long-term COD failure of the laser causes permanent damage to the laser, and the image display quality of the laser projection device deteriorates.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Three-color laser projection equipment
  • Three-color laser projection equipment
  • Three-color laser projection equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.

[0020] figure 1 It is a schematic diagram of the output characteristics of a laser when a COD fault occurs in the laser provided by the related art. The schematic diagram includes a first curve and a second curve, the first curve is a variation curve of the driving voltage of the laser, and the second curve is a variation curve of the driving current of the laser. The abscissa in the schematic diagram is the driving current, the first ordinate is the luminous power of the laser, and the second ordinate is the driving voltage of the laser. Wherein, the unit of driving current is ampere (A), the unit of luminous power is milliwatt (mW), and the unit of driving voltage is volt (V).

[0021] refer to figure 1 1. During the working p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

This application discloses a laser projection device, including a three-color laser. By setting a brightness sensor in the light path of the laser beam, the brightness sensor can detect the first brightness value of the laser light source and send the first brightness value to the display control circuit. The display control circuit is used to obtain the second brightness value corresponding to the driving current of each laser, and when the difference between the second brightness value of the laser and the first brightness value of the laser is greater than the difference threshold, it is determined that the laser has a COD failure . Then the display control circuit reduces the current control signal of the corresponding laser drive component of the laser until the difference is less than or equal to the difference threshold, which can eliminate the COD fault of the laser in time, reduce the damage rate of the laser, and ensure the reliability of the laser projection device. Image display effect.

Description

technical field [0001] The present disclosure relates to the field of projection display, in particular to a three-color laser projection device. Background technique [0002] At present, due to the advantages of strong monochromaticity, high brightness, and rich color gamut, lasers are gradually used as light sources for projection equipment. The laser light source usually includes multiple semiconductor laser diodes. The laser diode excites the active region by energizing the PN junction, forming a resonant cavity, and forming a stable oscillation, thereby emitting a single wavelength of laser light. Among them, the PN junction is grown on the nitride growth substrate, and the lasers of different colors are related to different nitride substrates. [0003] In the related art, when the laser in the laser projection device emits laser light, the semiconductor junction of the laser exceeds the power density and causes overload, so that the cavity surface of the laser is subj...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/20G09G3/00
CPCG03B21/2033G09G3/001
Inventor 崔荣荣曹利明
Owner QINGDAO HISENSE LASER DISPLAY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com