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Video display device

a technology of video display and display device, which is applied in the direction of picture reproducers, picture reproducers using projection devices, television systems, etc., can solve the problems of easy electrical connection of temperature sensors and radiation instability, and achieve the effect of improving thermal conductivity

Active Publication Date: 2016-02-23
DUALITAS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Particularly, in the laser beam source, self heat generation is increased according to the radiation of the laser beam, and in most cases, a change in the temperature of the laser beam source due to the heat generation generates instability of the radiation.
However, in this case, there is a problem in that it is not easy to electrically connect the temperature sensor 913 and the circuit substrate 801 to each other.

Method used

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Examples

Experimental program
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Effect test

first embodiment

[0027]As shown in FIG. 1, the video display device 101 of the present invention is mounted on a vehicle, particularly, on an automobile, and is used as a video display device for providing vehicle information with respect to a drive (observer) ST.

[0028]As shown in FIG. 1, the video display device 101 of the first embodiment of the present invention is configured to include a laser beam source module MD4 that includes the laser beam source LD emitting a laser beam Lc, and an image generation unit 11 that generates a desired display image from the laser beam Lc. Moreover, the video display device 101 includes an optical member OP which introduces video light Lf of the display image to a windshield WS of the vehicle, and a light intensity detection unit 35 which detects light intensity of the video light Lf. Moreover, a video VM of the display image generated by an image generation unit 11 is observed (visually confirmed) through the windshield WS by the observer (driver) ST.

[0029]Firs...

second embodiment

[0062]As shown in FIG. 6, the video display device 102 of the present invention is mounted on a laser projector for office work, or the like, and is used as a video display device which provides a video with respect to a viewer (observer) ST.

[0063]As shown in FIG. 6, the video display device 102 of the second embodiment of the present invention is configured to include a laser beam source module MJ4 which includes a laser beam source LD emitting the laser beam Lc, and the image generation unit 21 which generates a desired display image from the laser beam Lc. Moreover, the video display device 102 includes an optical member OP which introduces the video light Lf of the display image to a screen SC, and the light intensity detection unit 35 which detects light intensity of the laser beam Lc. In addition, the video VM of the display image generated by the image generation unit 21 is projected to the screen SC, and is observed (is visually confirmed) by the observer (viewer) ST.

[0064]F...

first modification

[0098

[0099]The unit CU1 including a sealing member CF7 shown in FIG. 11A may be configured with respect to the unit U1 of the first embodiment. According to the sealing member CF7, adverse effects to the temperature measurement member 17 due to condensation in the portion can be prevented.

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PUM

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Abstract

A video display device includes a laser beam source module including a laser beam source emitting a laser beam and a laser beam source drive unit supplying power to the laser beam source, and an image generation unit generating a desired display image from the laser beam. The laser beam source module includes a substrate having the placed laser beam source and improved thermal conductivity, a temperature measurement member measuring a temperature of the substrate, a temperature adjustment member contacting the substrate and adjusting the temperature of the substrate, a circuit substrate electrically connecting the temperature measurement member and the laser beam source. Moreover, the circuit substrate is disposed on a rear surface opposite to a placement surface on which the laser beam source is placed, the temperature measurement member is mounted on the circuit substrate, and a portion of the temperature measurement member is connected to the substrate.

Description

CLAIM OF PRIORITY[0001]This application claims benefit of priority to Japanese Patent Application No. 2013-199773 filed on Sep. 26, 2013, which is hereby incorporated by reference in its entirety.BACKGROUND[0002]1. Field of the Disclosure[0003]The present disclosure relates to a video display device using a laser beam, and particularly, relates to a video display device which has improved radiation stability of the laser beam and is visually confirmed with a stable display image.[0004]2. Description of the Related Art[0005]In recent years, a laser beam is applied to a wide range of fields such as an optical recording device, a measuring instrument, a printer, a medical instrument, a business machine, or the like which uses characteristics such as a small size, high efficiency, or high directivity. Particularly, recently, a video display device, which radiates the laser beam from the laser beam source to a projection surface such as a screen or a wall using the laser light source and...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H01S3/04H04N5/74H04N9/31
CPCH04N9/3144H04N5/7475H04N9/3129
Inventor YOSHIDA, TORU
Owner DUALITAS LTD