Screen levelness adjusting mechanism and projection display device

Abstract

The invention discloses a screen levelness adjusting mechanism and a projection display device, relates to the technical field of display, and aims to solve the problem of low screen levelness adjusting efficiency. The screen levelness adjusting mechanism comprises a reference part, a support shaft, a cam and a support plate, wherein the reference part and the support shaft are arranged on the back surface of a screen, and are positioned on the two sides of the vertical centerline of the screen; a retractable pawl component is arranged on the support shaft; a shaft hole is formed in the rotating center of the cam; a plurality of ratchets are annularly arranged on the inner surface of the shaft hole; the cam is arranged on the support shaft through the shaft hole in a sleeving way; each ratchet and the pawl component form a pawl wheel mechanism; the support plate is arranged on a screen support body; the upper surface of the support plate is in contact with the contour surface of the cam to support the cam. The screen levelness adjusting mechanism is used for regulating the levelness of the screen when the screen is suspended on the screen support body.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a screen level adjustment mechanism and a projection display device. Background technique [0002] In recent years, with the continuous development of display technology and the improvement of user requirements for display quality, the screens of projection display devices gradually adopt hard screens, and such hard screen screens are generally installed on walls by hanging. However, due to the large length and width of the screen and the existence of installation errors, when the screen is hung on the wall, the screen is prone to tilt, resulting in a tilt of the screen displayed on the screen, which seriously affects the viewing effect of the user. [0003] In order to solve the above problems, the following methods are often used to adjust the level of the screen in the prior art: two fixing brackets are arranged on the back of the screen, and adjusting screws are arranged on ...

AI Technical Summary

Problems solved by technology

However, due to the large size of the screen and the existence of installation errors, when the screen is hung on the wall, it is easy to tilt the screen, resulting in tilted images displayed on the screen, which seriously affects the viewing effect of the user.

[0003] In order to solve the above problems, the following methods are often used in the prior art to adjust the level of the screen: two fixing brackets are arranged on the back of the screen, and adjusting screws are arranged on the fixing brackets. When the screen is hung on the wall through the two fixing brackets When it is up, the distance between the two fixing brackets in the vertical direction can be adjusted by adjusting the screw, so as to realize the level adjustment of the screen; but in this adjustment method, the screen can only be removed from the wall for adjustment, and then the screen Hanging it back on the wall, on the one hand, brings inconvenience to disassembly and installation, and it is easy to cause damage to the expensive screen in the process. At the same time, due to the removal and adjustment, the effect of adjustment cannot be observed in real time, and it may need to be removed several times. Re-installation can be adjusted to the best position, all of which lead to low adjustment efficiency and usually require the operation of professionals

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