Intelligent adjustable multifunctional Chinese character visual chart

Abstract

Belonging to the field of visual charts, the invention discloses an intelligent adjustable multifunctional Chinese character visual chart. The intelligent adjustable multifunctional Chinese charactervisual chart comprises a wallboard, supporting seats are fixedly mounted on both sides of a lower end on the outer surface of the wallboard through mounting bolts, the inner side surfaces of the supporting seats are connected to supporting shafts, a frame is fixedly installed at the outer ends of the supporting shafts, an outer surface of the frame is rotatably installed to the outer surfaces of the supporting bases, a display screen is fixedly mounted at the front end inside the frame, a main board is fixedly mounted at an inner center of the frame, a cover plate is hinged to a rear side surface of the frame, a receiver is fixedly installed on a lower surface of the frame and is connected to the main board in series through a circuit, and fixed hooks are fixedly installed at middle positions of two sides on the outer surface of the wallboard, thus greatly improving the use convenience and stability, and guaranteeing the precision of eyesight testing.

Description

technical field [0001] The invention relates to the field of eye charts, and more specifically relates to an intelligent adjustable multifunctional Chinese character eye chart. Background technique [0002] An eye chart is a chart used to measure vision. Functionally, there are near vision chart and distance vision chart. The eye chart is formulated based on the principle of visual angle. Under normal circumstances, the human eye can distinguish the angle of view formed by the minimum distance between two points as the minimum angle of view, that is, the one-point angle of view eye chart is based on the design of an effective eye chart to detect visual acuity in units of one-point angle of view. [0003] However, the structure of the existing eye chart is relatively simple, and most of them use E-shaped boards to be installed inside the light box for use, so that they are fixedly installed on the wall, and the opening of the light box is generally located at the rear side,...

AI Technical Summary

Problems solved by technology

[0003] However, the structure of the existing eye chart is relatively simple, and most of them use E-shaped boards to be installed inside the light box for use, so that they are fixedly installed on the wall, and the opening of the light box is generally located at the rear side, so that it will be close to the wall. It is easy to disassemble and maintain, easy to interfere, and adopts a fixed word plate structure, which has a single function, only four orientations, up, down, left, and right. It is easy to guess correctly and affect the test results, and the use effect is not ideal.

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