Gantry type four dimensional automatic measurement platform used for detecting display screen color performance

Abstract

The invention discloses a composition method of a gantry-type four-dimensional automatic measuring platform for detecting the light-color performance of a display screen and the gantry-type four-dimensional automatic measurement platform using the method, which relates to the automatic measurement technology of the light-color performance of a display screen. It consists of a platform base, The gantry, the X-axis moving mechanism, the Y-axis moving mechanism, the Z-axis lifting mechanism and the rotating platform of the display screen, through the motion control circuit of each mechanism, flexibly control the light and color performance of the display screen. The four-dimensional automatic measuring platform completes the three-dimensional light and color measuring instrument. The mobile and the measured display screen rotate precisely in one dimension, with smooth movement of the light and color measuring instrument, small display screen rotation, novel structure, small driving force required, small size, light weight, low cost, fast measurement speed, and reliability advanced features. It can be widely used in LCD, LED TV screens, monitor screens, mobile phone screens and other automatic detection systems for light and color performance. Under computer management, it can intelligently adjust the coordinates of the test points and the display screen in three-dimensional directions according to the requirements of the light and color performance test of the display screen. Quickly complete the photochromatic performance inspection.

Description

technical field [0001] The invention belongs to the technical field of light and color performance measuring equipment, and relates to a display screen light and color performance measuring device, in particular to a gantry-type four-dimensional automatic measuring platform for automatically detecting the light and color performance of a display screen. Background technique [0002] With the advancement of technology, TVs, computers, mobile phones, cameras and other products use flat screens more and more widely, and the display area is getting larger and the images are getting clearer. These displays include LCD, PDP, LED display and so on. [0003] The flat display screen is developing towards the direction of lifelike image, delicate picture quality, rich layers, strong three-dimensional effect, high brightness, high contrast ratio, wide viewing angle and high definition. At present, some display screens, mainly LCD and LED screens, have a small viewing angle. When viewi...

AI Technical Summary

Problems solved by technology

[0005] (1) Complex structure and large volume

The one-dimensional viewing angle measurement and the two-dimensional plane color uniformity measurement of the measuring table must be realized through the vertical and horizontal two-dimensional movement of the plane, the vertical and horizontal movement of the measuring instrument, the rotation of the rotating arm, and the five-dimensional movement of the hydraulic base lifting. The floor area is more than 4 times the area of ​​the display screen under test. The viewing angle is measured by the rotating table of the light color measuring instrument. The turning radius of the rotating arm is large and increases with the size of the display screen. Generally, it is 3 times the height of the display screen under test. times, the size of the display screen under test increases, the light and color measuring instrument on the rotary table 01 rises higher, and the linear motion space of the two-dimensional mobile platform increases accordingly, making the measuring table even larger

[0006] (2) The driving force of linear motion is large

The two-dimensional vertical and horizontal movement must drive the stage and the screen under test to move, and the lifting mechanism must drive the mounting table of the tested part and the vertical and horizontal two-dimensional moving mechanism to move together. Due to the large volume and heavy equipment, the required driving force is very large.

[0007] (3) Low degree of automation

The rotating table 01 and the two-dimensional mobile platform 02 of the photochromic measuring instrument are not in a unified coordinate system, so it is difficult to accurately adjust the position of the coordinate points and the viewing angle of the display screen in the three-dimensional direction. The intelligence of the measurement and use operation is low, and the measurement accuracy and reliability are poor. Difficult to repeat measurement conditions, poor consistency

Inconvenient operation and slow measurement speed

[0008] (4) Poor movement stability

The measuring platform is biased to one side. Due to the heavy weight of the mounting table of the tested part, the center of gravity of the equipment is shifted, and the movement mechanism must bear a large gravity torque, which seriously affects the stability of the equipment movement.

[0009] (5) The size of the measurement object is not large enough

The application field of the measuring table is limited by the structure, cost, etc., and it is difficult to popularize and apply to the automatic measurement of the light and color properties of larger-sized display screens

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