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Projection display device

A technology of projection display and equipment, applied in the field of projection display equipment, can solve the problems of aging, high maintenance cost, reduced light absorption and so on

Active Publication Date: 2019-09-10
APPOTRONICS CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the light-absorbing element will age after long-term use, and the light-absorbing effect will decrease, so it needs to be replaced regularly, resulting in high maintenance costs

Method used

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Embodiment Construction

[0079] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0080] figure 1 It is a schematic structural diagram of a projection display device in an embodiment of the present invention. Such as figure 1 As shown, in one embodiment, the projection display device includes a light source 10 , a relay system 20 , a spatial light modulator 30 , a projection lens 40 , a light absorbing element 50 , a control device 60 , a signal receiving interface 70 and a storage device 80 . in:

[0081] The light source 10 emits a lig...

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Abstract

A projection display device comprises a light source, a control device, a spatial light modulator, a projection lens and a light absorption element, the light source is used for emitting light sourcelight, and the light source light comprises light source light of three primary colors; the control device is used for sending a driving signal to the spatial light modulator; the spatial light modulator is used for modulating the light source light according to the driving signal to form image light and non-image light, the image light is output to the projection lens, and the non-image light isoutput to the light absorption element; the projection lens is used for projecting image light to form an image; the light absorption element is used for absorbing non-image light; and under the condition that the image signal is acquired abnormally, in a color image frame modulation period, the control device controls the light source to close any one or any two of the three primary color light source lights. According to the projection display device, non-image light output to the light absorption element can be reduced, so that the service life of the light absorption element can be prolonged, and the maintenance cost of the projection display device is reduced.

Description

technical field [0001] The invention relates to the field of projection display, in particular to a projection display device. Background technique [0002] The projection display device projects the video image signal input by the external device or the video image signal transmitted by the network into a corresponding image; or, the projection display device projects and displays the corresponding image based on the image data stored in the local storage device. [0003] In the process of projecting and displaying images by a projection display device, a spatial light modulator plays an important role. The spatial light modulator modulates the light source light into image light used to form an image. The proportion of image light to the light source light depends on the image data used in the modulation process of the spatial light modulator. During the image modulation process, generally a Non-image light other than image light. If the non-image light is not absorbed, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/31
CPCH04N9/3155G02B27/18G03B21/14H04N9/31
Inventor 杨佳翼陈红运亓森林李屹
Owner APPOTRONICS CORP LTD