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

Optical axis adjusting apparatus, optical axis adjusting method, and projection type display apparatus

A technology for a display device and an adjustment device, which is applied to projection devices, optics, optical components, etc., can solve the problems of difficult laser offset adjustment, dependence on technical capabilities, etc.

Inactive Publication Date: 2012-01-18
HITACHI LTD
View PDF6 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The conventional projection display device disclosed in Patent Document 2 adjusts the offset of each laser beam using a MEMS mirror while projecting each laser beam onto a screen while viewing the screen. technical capabilities, and in addition, it is difficult to perform precise laser offset adjustments over the entire irradiation area

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
  • Optical axis adjusting apparatus, optical axis adjusting method, and projection type display apparatus
  • Optical axis adjusting apparatus, optical axis adjusting method, and projection type display apparatus
  • Optical axis adjusting apparatus, optical axis adjusting method, and projection type display apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0028] figure 1 It is a figure explaining the basic structure of the projection display apparatus concerning 1st Embodiment of this invention. exist figure 1 Among them, reference numerals 1a, 1b, 1c respectively represent light sources such as green, blue, and red semiconductor lasers; reference numerals 2a, 2b, 2c represent light sources 1a, 1b, and 1c condenser lenses; reference numeral 3 represents condenser lenses. Optical lens; Reference numerals 4a, 4b, 4c represent actuators for light sources and condenser lenses; Reference numerals 5a, 5b represent light-combining filters that combine light beam lines from each light source; Reference numerals 6a and 6b denote optical filters for reflecting and splitting part of the combined laser light; reference numeral 7a denotes a camera mechanism for position detection; reference numeral 7b denotes a camera mechanism for angle detection; A scanning mirror for projecting an image onto a screen 17 by reflecting light beams at an ...

Embodiment approach 2

[0048] image 3 It is a flowchart explaining the method of adjusting the optical axis of the light sources 1a, 1b, 1c which is the second embodiment of the present invention, and it will be described below. The optical axis adjustment method of the second embodiment is different from that of the first embodiment in the optical axis adjustment step, and the basic configuration of the display device is the same as that of the first embodiment. figure 1 The same as shown and explained.

[0049] (1) First, as in the case of the first embodiment, the light source 1a is selected as a reference light source, only the reference light source 1a is turned on, and the laser light emitted from the light source 1a is reflected and spectroscopically split by a filter 6a, 6b are divided into two laser beams, the light that has passed through the optical filter 6b is incident on the imaging surface of the position detection imaging mechanism 7a, and the light reflected by the optical filter ...

Embodiment approach 3

[0060] Figure 4 is a diagram illustrating the basic configuration of a projection display device according to a third embodiment of the present invention, Figure 5 It is a diagram explaining the inclination of the light source 1 placed at the focal position of the condenser lens 2 and the position change of the optical axis 16 of the laser light emitted from the condenser lens 2 . Figure 4 A third embodiment of the invention is shown with figure 1 The configurations of the first and second embodiments of the present invention shown and described are basically the same configuration, and the method of adjusting the optical axis is also the same.

[0061] The third embodiment of the present invention and figure 1 The difference between the first embodiment of the present invention shown and described lies in the optical axis adjustment actuators of the light sources 1a, 1b, 1c and the adjustment method of the actuators. Hereinafter, differences between the third embodiment...

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

Provided is a projection type display apparatus in which an inclination and a positional deviation of optical axes among a plurality of light sources can be easily corrected to obtain a high quality projection image. The green, blue and red laser beams emitted from light sources (1a, 1b, 1c) are converted to parallel beams by condenser lenses (2a, 2b, 2c), and the positions and angles of the optical axes of the beams of the three colors are evaluated by a position detection image pickup means (7a) and an angle detection image pickup means (7b), respectively. The positions and angles of the light sources are adjusted by respective actuators (4a, 4b, 4c) so that the positions and angles of the optical axes are identical. Consequently, the laser beams emitted from the light sources (1a, 1b, 1c) can be combined with high accuracy to thereby realize a high definition projection type display apparatus.

Description

technical field [0001] The present invention relates to an optical axis adjustment device, an optical axis adjustment method, and a projection display device, and more particularly, to an optical axis adjustment device and an optical axis adjustment method for aligning the optical axes of multiple laser beams, such as a laser projection display device, with high precision. And a projection display device using the optical axis adjustment device. Background technique [0002] In recent years, along with the development of small green lasers and blue semiconductor lasers using wavelength conversion elements, ultra-small projectors using laser light as a light source have been proposed. A projector using such a laser light source has good color reproducibility, can realize low power consumption, miniaturization, and is a scanning image display device, so the pixels are not fixed, and the resolution can be easily converted. Such advantages. [0003] In addition, ultra-small pr...

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
IPC IPC(8): G02B27/62G02B26/10G03B21/00H04N5/74
CPCH04N9/3135G03B21/28G03B21/00H04N9/3129G03B21/14H04N9/3155G03B21/2046G03B21/2013G03B21/2033G03B21/2066G02B27/62G02B26/10H04N5/74
Inventor 桥爪滋郎
Owner HITACHI 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