Projection type image display device

一种影像显示、投影的技术，应用在放映装置、仪器、光学等方向，能够解决移动动作延迟、操作性降低等问题，达到操作性优越的效果

Active Publication Date: 2020-03-27
MAXELL HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, there is a problem that when the direction of movement of the projection lens is reversed from the left to the right and from the top to the bottom, the X and Y sliders do not operate until the backlash is filled, and the movement operation is delayed. and reduce operability

Method used

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  • Projection type image display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] figure 1 It is a figure which shows the whole structure of the projection-type image display apparatus 10, and shows the internal structure of the housing|casing of the apparatus except for. The housing 1 contains an optical engine 2 as an optical system that emits light from a light source and irradiates it to a liquid crystal panel as a display element to form an image; and projection optics that enlarge and project the image formed by the liquid crystal panel through a projection lens System 3. In addition, a power supply unit, a cooling unit, a video signal circuit, a control circuit, etc., which are not shown, are stored.

[0039] figure 2 It is a diagram showing the overall configuration of the optical engine 2. The optical engine 2 is composed of a light source unit 21, a color separation optical system 22, and a color synthesis optical system 23. A light source such as an ultra-high pressure mercury lamp is used for the light source unit 21, and emits substantia...

Embodiment 2

[0069] In Example 2, a lens moving mechanism capable of easily correcting the tilt of the optical axis of the projection lens will be described. Such as Image 6 As described above, the initial correction of the tilt caused by the position of the projection lens 31 and the weight of the lens can be performed by adjusting the insertion amount of the four lens position correction bolts 411a to 411d. However, when replacing the projection lens 31 with a heavier lens, it is necessary to further correct the tilt of the optical axis due to the weight of the lens. In the method of adjusting with the four correction bolts 411a to 411d, the adjustment work becomes complicated. Therefore, a mechanism for simply correcting the tilt of the optical axis described below is supplemented.

[0070] Figure 17 It is a cross-sectional view showing the optical axis correction mechanism of the projection lens. In this embodiment, the tilting of the lens moving mechanism 32 when a heavy lens is moun...

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Abstract

The lens moving mechanism (32) of the projection type image display device (10) of the present invention includes: a horizontally movable base (60) for moving the projection lens (31) in the horizontal direction and a vertically movable base (60) for moving in the vertical direction; a base (70); and an actuator (61) for horizontal driving and an actuator (71) for vertical driving to drive them. The driving force from the actuator (61) for horizontal driving and the actuator (71) for vertical driving passes through the screw (671 (751)) and the two screw nuts (672, 672b (752, 752b) engaged with it, respectively. )) transfer to make the horizontal movable base and the vertical movable base move. The elastic member (672c (752c)) applying pressure is installed so that the two lead screw nuts move away from each other or approach each other in the axial direction of the lead screw. With this structure, the backlash at the time of lens movement is reduced and the delay of movement action is eliminated.

Description

Technical field [0001] The present invention relates to a projection type image display device, and more particularly to a lens moving mechanism that moves a projection lens. Background technique [0002] A projection type image display device such as a liquid crystal projector is a device that irradiates light from a light source such as a mercury lamp to a display element such as a liquid crystal panel, and enlarges and projects an image formed by the display element from a projection lens to a screen. The optical system of the device is composed of an optical unit (hereinafter referred to as an optical engine) and a projection optical system. The optical unit irradiates light emitted from the light source onto the liquid crystal panel to form an image, and the projection optical system transforms the image formed by the liquid crystal panel. Enlarged projection through the projection lens. [0003] In order to adjust the image display position on the screen, the projection opti...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G03B21/14G02B7/02
CPCG03B21/147G03B21/142G03B21/14G02B27/0955G03B21/2033
Inventor石岛英纪乾真朗大岛浩松井信树
OwnerMAXELL HLDG LTD