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Display device definition test card and its definition measuring method

A display device and resolution technology, applied in the field of display device resolution test card and its resolution measurement, can solve problems such as difficulty in determining the test dimension, and achieve the effect of true and accurate results, direct and accurate readings, and obvious test lines

Inactive Publication Date: 2008-03-19
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

However, it is well known that the measurement method of "image sharpness" + "moving image smearing time" can only indirectly obtain some dynamic performance indicators of display devices, and cannot directly obtain test results directly related to dynamic sharpness
In addition, the measurement method of "image sharpness" + "moving image smearing time" combines the measurement method of image sharpness based on TV scanning line resolution and the measurement method based on brightness gray scale response time, which is difficult to determine Technical Problems of Test Dimensions

Method used

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  • Display device definition test card and its definition measuring method

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Embodiment Construction

[0028] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0029] Fig. 1 has shown the test card of the present invention applicable to the image definition test of various display devices. The test card adopts a simple graphic combination of radial test lines and circular test reference rings, and is divided into two types: bright lines on a black background or black lines on a bright background. Figure 1 shows a test chart with a black background and bright line test pattern, which includes:

[0030] The test center reference lines 1a and 1b are composed of a group of horizontal test center reference lines 1a and vertical ...

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Abstract

The present invention discloses a display device definition testing card and the dynamic definition measuring method thereof. The testing card uses simple graphic combination such as a radial testing line, a round testing fiducial ring, and the like, and includes a testing center fiducial line, a testing symmetry marking line, a graphic fiducial center, a fan-shaped testing line group, a testing ficucial ring, and a testing graph boundary. The measuring method uses the rotation of the radial testing line of the testing card, and the adjustment and the change of the relevant parameter to realize and complete the test of the dynamic definition of the moving image on the display device. The measuring method can be used conveniently and rapidly, and the measurement result is actual and accurate.

Description

technical field [0001] The invention relates to a method for measuring the clarity of a display device, in particular to a test card for the clarity of a display device and a method for measuring the clarity thereof. Background technique [0002] With the rapid development of science and technology, today's display devices are no longer a single traditional cathode ray display device (CRT), but include various display devices of various types and structures, for example, liquid crystal displays (LCDs) ), Plasma Display (PDP), Light Emitting Diode Display (LED), Vacuum Fluorescent Display (VFD), Field Emission Display (FED), etc. In particular, flat-panel display devices and their display technologies have developed rapidly in recent years, and various types of flat-panel display devices have entered the application of relatively moving video and television images from traditional characters and relatively static image display applications. application. [0003] In the disp...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01M11/00G01M11/02G09G3/00H04N17/00
Inventor 龙沪强
Owner SHANGHAI JIAO TONG UNIV
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