CN103674495A - Display panel color gamut value testing system - Google Patents

Abstract

The invention discloses a display panel color gamut value testing system, which includes a data processing device, a data acquisition device, a first data transmission line and a second data transmission line; the first data transmission line is used to connect the data processing device and the device to be tested Display panel; the second data transmission line is used to connect the data processing device and the data acquisition device; the data processing device sends a test signal to the display panel to be tested so that the display panel to be tested displays a specified primary color screen; the data acquisition device collects the color coordinates of the primary color surface, and sends it to the data processing device for calculation to generate a color gamut value. The beneficial effects of the present invention are as follows: control the display panel to be tested to display a specified picture, collect the color coordinates of the primary color surface picture and send it to the data processing device, calculate the color gamut value of the display panel to be tested according to the color coordinates, and realize the display panel to be tested. Manual color gamut value testing reduces error probability and improves efficiency.

Description

A display panel color gamut value testing system

technical field

The invention relates to the field of display technology, in particular to a display panel color gamut value testing system.

Background technique

Flat panel displays have been widely accepted due to their lightness, thinness, and low power consumption, such as thin film transistor liquid crystal displays (Thin Film Transistor Liquid Crystal Display, TFT-LCD), or active light emitting diode displays (Organic Light Emitting Diode, OLED).

In the production process of flat panel displays, in order to ensure the yield rate of the display panel, it is necessary to test various characteristics of the display panel, such as abnormal color blocks, bright and dark spots, uniformity of chromaticity, brightness, contrast, color gamut, response time, etc. wait. Among them, the color gamut (Color Gamut) is a relatively important color characteristic. The color gamut refers to the range area formed by the number of colors that can be expressed by a certain display device. The color coordinates of a primary color. At present, the commonly used test method is manual. The staff observes whether the color gamut value of the display panel during the display process is less than a predetermined threshold through optical instruments to judge whether the display panel is qualified. However, manual testing not only wastes manpower but also affects the efficiency of product development and production, and is limited by subjective factors, the probability of testing errors is high.

Contents of the invention

The object of the present invention is to provide a display panel color gamut value testing system to solve the problems of waste of manpower, low efficiency and error-prone in manual testing.

The purpose of the present invention is achieved through the following technical solutions:

An embodiment of the present invention provides a display panel color gamut value testing system, including: a data processing device, a data acquisition device, a first data transmission line and a second data transmission line; wherein,

The first data transmission line is used to connect the data processing device and the display panel to be tested;

The second data transmission line is used to connect the data processing device and the data acquisition device; the data processing device sends a test signal to the display panel to be tested so that the display panel to be tested displays a specified primary color picture;

The data collection device collects the color coordinates of the primary color surface and sends them to the data processing device for calculation to generate a color gamut value.

In this embodiment, the data processing device controls the display panel to be tested to display a specified picture, so that the data acquisition device collects the color coordinates of the primary color surface and sends it to the data processing device, and then the data processing device calculates the color coordinates of the primary color surface to obtain the image to be tested. The color gamut value of the display panel is measured, and the non-artificial color gamut value test of the display panel to be tested is realized, the error probability is reduced, and the efficiency is improved.

Preferably, the color coordinates of the primary color picture include the color coordinates of the central point of the red primary color picture, the color coordinates of the central point of the green primary color picture, and the color coordinates of the central point of the blue primary color picture.

Preferably, the data processing device calculates the color coordinates of the primary color surface to generate a color gamut value, including:

Calculate the color gamut area according to the color coordinates of the center point of the red, green and blue primary color screen;

The color gamut value is calculated according to the color gamut area.

Preferably, the formula for calculating the color gamut area according to the color coordinates of the center point of the red primary color, green primary color and blue primary color picture includes:

S=[(U _r -U _b )(V _g -V _b )-(U _g -U _b )(V _r -V _b )]/2

Among them, S is the color gamut area, (U _r , V _r ) is the color coordinate of the center point of the red primary color screen, (U _g , V _g ) is the color coordinate of the center point of the green primary color screen, (U _b , V _b ) is The color coordinates of the center point of the blue primary color screen.

Preferably, the formula for calculating the color gamut value according to the color gamut area includes:

C=(S/0.1952)*100%

Wherein, C is the color gamut value.

In this embodiment, the data processing device calculates the color gamut value according to the color coordinates of the central points of the red, green and blue screens collected by the data acquisition device, thereby realizing a non-artificial color gamut value test, reducing the error probability, and improving efficiency.

Preferably, the test signal is a video signal generated by the data processing device according to the images used for testing. The data processing device directly generates video signals for display by the display panel to be tested, without the need for additional switching devices, which saves costs and facilitates system structure simplification.

Preferably, the data processing device includes a first interface, and the first interface is connected to the display panel to be tested through the first data transmission line; wherein, the first interface is a USB type A socket, and the first The data transmission cable is a USB interface-to-VGA interface data cable, a USB interface-to-DVI interface data cable, a USB interface-to-HDMI interface data cable, or a USB interface-to-DisplayPort interface data cable. In this embodiment, the first interface has a relatively low implementation cost, and the interface used for the first data transmission line to connect with the display panel to be tested can provide multiple options, which is convenient for testing display devices with various interfaces.

Preferably, the data processing device includes a second interface, the data collection device includes a third interface, and the second interface is connected to the third interface of the data collection device through the second data transmission line; Wherein, the second interface is a USB A-type socket, the third interface is a USB B-type plug, and the second data transmission line is a USB printing data line. In this embodiment, the second interface, the third interface and the second data transmission line have relatively low implementation costs.

Preferably, the data processing device is a computer device or an embedded system.

Preferably, the data acquisition device is a color analyzer.

The beneficial effects of the embodiments of the present invention are as follows: the data processing device controls the display panel to be tested to display a specified picture, so that the data acquisition device collects the color coordinates of the primary color surface and sends it to the data processing device, and then the data processing device calculates the color coordinates of the primary color surface The color gamut value of the display panel to be tested is obtained, and the non-artificial color gamut value test of the display panel to be tested is realized, the error probability is reduced, and the efficiency is improved.

Description of drawings

FIG. 1 is a schematic structural diagram of a display panel color gamut value testing system provided by an embodiment of the present invention.

Detailed ways

The implementation process of the embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

Referring to FIG. 1, an embodiment of the present invention provides a display panel color gamut value testing system, including: a data processing device 1, a data acquisition device 2, a first data transmission line 3 and a second data transmission line 4;

The data processing device 1 is connected to the display panel 5 to be tested through the first data transmission line 3, sends a test signal to the display panel 5 to be tested to make the display panel to be tested display a specified primary color picture, and receives the data acquisition device through the second data transmission line 4. 2. Send and collect the color coordinates of the base color surface painting, and calculate the color coordinates of the base color surface painting;

The data collection device 2 collects the color coordinates of the primary color surface of the display panel 5 to be tested, and sends the color coordinates of the primary color surface to the data processing device 1 . In this embodiment, the data acquisition device 2 may be a color analyzer, which includes a probe 22, and the probe 22 of the data acquisition device 2 monitors the display screen of the display panel 5 to be tested.

In this embodiment, the data processing device 1 controls the display panel to be tested to display a specified picture, so that the data acquisition device 2 collects the color coordinates of the primary color surface and sends it to the data processing device 1, and then the data processing device 1 according to the color coordinates of the primary color surface The color gamut value of the display panel 5 to be tested is calculated to realize the non-artificial color gamut value test of the display panel 5 to be tested, which reduces error probability and improves efficiency.

The color coordinates of the primary color surface picture include the color coordinates of the center point of the red primary color picture, the color coordinates of the green primary color picture center point, and the color coordinates of the blue primary color picture center point. The data processing device 1 directly generates video signals for display by the display panel 5 to be tested. The video signal may be a red primary color picture, a green primary color picture and a blue primary color picture. In this embodiment, the video signal is directly generated without an additional switching device, which saves cost and facilitates the simplification of the system structure.

The data processing device 1 calculates the color coordinates of the primary color surface to generate a color gamut value, including:

Calculate the color gamut area according to the color coordinates of the center point of the red primary color, green primary color and blue primary color screen;

Calculates the gamut value based on the gamut area.

A more intuitive example, such as: the data processing device 1 sequentially generates a red primary color picture, a green primary color picture and a blue primary color picture for display by the display panel 5 to be tested, and the data acquisition device 2 sequentially collects the red color displayed by the display panel 5 to be tested through the probe 22. The color coordinates of the central point of the primary color picture, the green primary color picture and the blue primary color picture are sent to the data processing device 1 through the second data transmission line 4, so that the data processing device 1 can be based on the red primary color picture, the green primary color picture and the blue primary color picture. The color coordinates of the center point calculate the three-primary color gamut area of the display panel 5 to be tested, and then calculate the three-primary color gamut value of the display panel 5 to be tested.

According to the color coordinates of the center points of the red primary color picture, the green primary color picture and the blue primary color picture, the calculated color gamut value of the color gamut value is as follows:

First, calculate the color gamut area according to the color coordinates of the center point of the red primary color, green primary color and blue primary color screen displayed by the display panel to be tested, as shown in formula (1):

S=[(U _r -U _b )(V _g -V _b )-(U _g -U _b )(V _r -V _b )]/2 (1)

Among them, S is the color gamut area, (Ur, Vr) is the color coordinate of the center point of the red primary color screen, (U _g , V _g ) is the color coordinate of the green primary color screen center point, (U _b , V _b ) is the blue primary color The color coordinates of the center point of the screen.

Calculate the color gamut value based on the color gamut area calculated by the above formula (1), such as formula (2):

C=(S/0.1952)*100% (2)

Among them, C is the color gamut value.

In this embodiment, the data processing device 1 calculates the color gamut value according to the color coordinates of the center point of the red primary color, green primary color, and blue primary color screen collected by the data collection device 2, thereby realizing a non-artificial color gamut value test and reducing errors probability and increased efficiency.

Preferably, the test signal is a video signal generated by the data processing device 1 according to the images used for testing. The data processing device 1 directly generates a video signal for display by the display panel 5 to be tested, without the need for an additional switching device, which saves costs and facilitates the simplification of the system structure.

Preferably, the data processing device 1 includes a first interface 11, and the first interface 11 is connected to the display panel 5 to be tested by the first data transmission line 3; wherein, the first interface 11 is a USB A type socket, and the first data transmission line 3 is USB interface to VGA interface data cable, USB interface to DVI interface data cable, USB interface to HDMI interface data cable or USB interface to DisplayPort interface data cable. In this embodiment, the first interface 11 has a relatively low implementation cost, and the interface used by the first data transmission line 3 to connect to the display panel 5 to be tested can provide multiple options, which is convenient for testing display devices with various interfaces.

Preferably, the data processing device 1 includes a second interface 12, the data acquisition device 2 includes a third interface 21, and the second interface 12 is connected to the third interface 21 of the data acquisition device 2 through the second data transmission line 4; wherein, the second The interface 12 is a USB A-type socket, the third interface 21 is a USB B-type plug, and the second data transmission line 4 is a USB printing data line. In this embodiment, the second interface 12, the third interface 21 and the second data transmission line 4 have relatively low implementation costs. However, those skilled in the art may also select other types of interfaces and data lines according to requirements, and the present invention is not limited thereto.

Preferably, the data processing device 1 is a computer device or an embedded system.

It should be noted that the display panel to be tested mentioned in the present invention may be an LCD display panel, an Organic Light Emitting Diode (OLED) display panel, or a plasma display panel.

The beneficial effects of the embodiments of the present invention are as follows: the data processing device controls the display panel to be tested to display a specified picture, so that the data acquisition device collects the color coordinates of the primary color surface and sends it to the data processing device, and then the data processing device calculates the color coordinates of the primary color surface The color gamut value of the display panel to be tested is obtained, and the non-artificial color gamut value test of the display panel to be tested is realized, the error probability is reduced, and the efficiency is improved.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (10)

1. a display panel colour gamut value test macro, is characterized in that, comprising: data processing equipment, data collector, first data transmission line and the second data line, wherein,

Described first data transmission line is used for connecting described data processing equipment and display panel to be tested;

Described the second data line is used for connecting described data processing equipment and described data collector; Described data processing equipment sends test massage and makes described display panel to be tested show the primary colours picture of regulation to described display panel to be tested;

Described data collector gathers the chromaticity coordinates that described primary colours face is drawn, and sends to data processing equipment to calculate generation colour gamut value.

2. test macro as claimed in claim 1, is characterized in that, the chromaticity coordinates that described primary colours face is drawn comprises the chromaticity coordinates of the chromaticity coordinates of red primary picture central point, the chromaticity coordinates of green primary picture central point and blue primary picture central point.

3. test macro as claimed in claim 2, is characterized in that, the chromaticity coordinates that described data processing equipment is drawn described primary colours face calculates and generates colour gamut value, comprising:

According to the chromaticity coordinates of red, green and blue primary colours picture central point, calculate gamut area;

According to described gamut area, calculate described colour gamut value.

4. test macro as claimed in claim 3, is characterized in that, the described chromaticity coordinates according to red primary, green primary and blue primary picture central point calculates the formula of gamut area, comprising:

S=[(U _r-U _b)(V _g-V _b)-(U _g-U _b)(V _r-V _b)]/2

Wherein, S is gamut area, (U _r, V _r) be the chromaticity coordinates of red primary picture central point, (U _g, V _g) be the chromaticity coordinates of green primary picture central point, (U _b, V _b) be the chromaticity coordinates of blue primary picture central point.

5. test macro as claimed in claim 4, is characterized in that, the described formula that calculates described colour gamut value according to described gamut area, comprising:

C=（S/0.1952）*100%

Wherein, the described colour gamut value that C is described display panel to be tested.

6. test macro as claimed in claim 1, is characterized in that, described test signal is the vision signal that described data processing equipment generates according to the image for testing.

7. test macro as claimed in claim 1, is characterized in that, described data processing equipment comprises first interface, and described first interface is connected with display panel to be tested by described first data transmission line; Wherein, described first interface is USB A type socket, and described first data transmission line is that USB interface turns VGA interface data wire, USB interface and turns DVI interface data wire, USB interface and turn HDMI interface data wire or USB interface and turn any one in DisplayPort interface data wire.

8. test macro as claimed in claim 1, it is characterized in that, described data processing equipment comprises the second interface, and described data collector comprises the 3rd interface, and described the second interface is connected with described the 3rd interface of described data collector by described the second data line; Wherein, described the second interface is USB A type socket, and described the 3rd interface is USB Type B plug, and described the second data line is USB print data line.

9. test macro as claimed in claim 1, is characterized in that, described data processing equipment is computer installation or embedded system.

10. test macro as claimed in claim 1, is characterized in that, described data collector is color analysis instrument.

Images