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Projector for rear-projection TV

A technology of projection device and rear projection, which is applied in the direction of TV, color TV parts, TV system parts, etc., which can solve the problems of bulky appearance, limited popularization, incoordination, etc.

Inactive Publication Date: 2005-11-16
尤 四 龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this structure makes the projector must be arranged under the screen in the fuselage, so that the lower half of the TV itself has to be installed as a large-scale cover speaker, resulting in a bulky and uncoordinated overall appearance, which has been popularized. very restrictive

Method used

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  • Projector for rear-projection TV
  • Projector for rear-projection TV
  • Projector for rear-projection TV

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Embodiment Construction

[0025] Such as figure 1 , 2 As shown, the structure of the present invention can be divided into three parts, one is a projector, the other is a light return device, and the third is a screen. The structure, imaging principle and characteristics produced are described below:

[0026] 1. Projector: mainly consists of a light bulb light source 1, a set of Condenser Lens, including lenses 11, 11', 12, 12' and 13, a video display board (Video Display) 2, a Diaphram 3 and two sets of projection lens groups 4 and 4' juxtaposed up and down.

[0027] 2. Light return device: mainly consists of upper and lower groups, each group is composed of three mirrors facing each other, and the primary mirror 5 mirrors of the upper group have an included angle of 120 degrees with the central axis of the projection lens 4 , the secondary reflector 6 is approximately 90 degrees perpendicular to the screen, and has an angle of approximately 60 degrees with the tertiary reflector 7. The primary refl...

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Abstract

A projection device of a back projection TV is divided into three parts: a projector light return device and a screen, in which, the projector is composed of a dual-light beam projection lens capable of projecting partition pictures and its internal optical components, the light rotation device realizes turning around the projection lights, and the screen for displaying pictures is set in front of the projector. Two reversed picture light beams are projected first from the projector to reach the screen after three times of turnaround reflections by the reflection mirror in the light return device to merge to an amplified picture to save space.

Description

technical field [0001] The invention relates to a projection device for a rear projection television. Background technique [0002] The structure of a general rear projection TV is mainly a three-lens type with a group of red, green and blue primary colors separated, or a single-lens type with three primary colors in one, combined with an internal electronic optical development device, and by means of two mirrors The reflection of the image, and then focus the light beam of the image on the screen. This kind of rear projection TV integrated with the projector and the screen can indeed shorten the projection distance because of the use of reflective lenses, so that the thickness of the TV body can be about Reduced by half to achieve the function of reducing part volume. However, this structure makes the projector must be arranged under the screen in the fuselage, so that the lower half of the TV itself has to be installed as a large-scale cover speaker, resulting in a bulky ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/18H04N5/74
Inventor 尤四龙
Owner 尤 四 龙