Device for automatically verifying output of display driving board

Abstract

The utility model relates to a device for automatically verifying the output of a display driving board, which comprises a signal generator and a data verification board, the output end of the signal generator is electrically connected with the input end of the display driving board, and the input end of the data verification board is electrically connected with the output end of the display driving board; the data verification board is provided with a Scaler chip, and the Scaler chip is used for receiving and processing output data of the display driving board; image data output by the signal generator is transmitted to the data verification board through the display driving board and is received, processed and output through the Scaler chip on the data verification board, in the whole process, the problem of image distortion caused by various reasons can be reflected in result data output by the Scaler chip, verification results do not need to be displayed by matching with different display screens, and the verification efficiency is improved. And external photographing equipment is not needed, so that the acquired data is more accurate, the verification result is more reliable, and the equipment cost required by verification can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to display drive board technical field more specifically, relate to a device that automatically verifies display drive board output. BACKGROUND

[0002] The manufacture, assembly and verification of display equipment have strict procedures and processes, among which the production and verification of display drive boards are particularly complex. The early verification method for display drive boards is shown in FIG. 1, in which the output data of the display drive board 3 is displayed through display screens 4 of different interfaces, sizes and parameters, and then verified through artificial visual observation. This method is prone to misjudgment and omission, which greatly challenges the control of the production quality of display equipment. With the requirements of product modular design and fine manufacturing division of labor, the use of automatic and intelligent verification devices to replace manual methods has gradually become a trend. The existing technology starts to use a machine vision verification method to replace human visual verification, as shown in FIG. 2. First, an industrial camera 5 captures the display screen, and then the file is transmitted back to a computer 6 for program judgment of whether the display screen is normal. However, this existing solution uses expensive industrial cameras 5 and needs to be matched with special computers 6, resulting in high equipment cost for production verification. Due to the inherent deficiency of industrial cameras in capturing dark pictures, noise is easily generated to affect the final structure judgment. Moreover, the shooting conditions need to be strictly controlled, such as environmental light, orientation, distance and focusing. In addition, it is still difficult to avoid the use of different display screens. In view of the above factors, the existing machine vision verification method to replace human visual verification also has obvious shortcomings. Therefore, it is urgent to design and develop a new device for verifying the output of display drive boards. Figure 1 SUMMARY Figure 2 The utility model solves the technical problem that in view of the above defects of the prior art, a device for automatically verifying the output of a display drive board is provided.

[0003] The utility model solves the technical problem that in view of the above defects of the prior art, a device for automatically verifying the output of a display drive board is provided.

[0004] The utility model adopts the technical scheme that a device for automatically verifying the output of a display drive board comprises a signal generator and a data verification board, the output end of the signal generator is electrically connected with the input end of the display drive board, and the input end of the data verification board is electrically connected with the output end of the display drive board. A Scaler chip is arranged on the data verification board, and the Scaler chip is used for receiving and processing the output data of the display drive board.

[0005] In some embodiments, the Scaler chip comprises a receiving port, the input end of the receiving port is electrically connected with the output end of the display drive board to receive RGB signals or YUV signals.​

[0006] In some embodiments, the Scaler chip further comprises an image signal conversion module, an input end of the image signal conversion module being electrically connected with an output end of the receiving port to convert the received RGB signal into a YUV signal.

[0007] In some embodiments, the Scaler chip further comprises a YUV signal analysis module, an input end of the YUV signal analysis module being electrically connected with an output end of the image signal conversion module to perform histogram statistics on the Y component in the YUV signal.

[0008] In some embodiments, the Scaler chip further comprises a master control module, an input end of the master control module being electrically connected with an output end of the YUV signal analysis module to perform normalization processing on the histogram data.

[0009] In some embodiments, the data verification board is further provided with a first indicator light and a second indicator light, the first indicator light and the second indicator light being respectively electrically connected with an output end of the master control module to display light of corresponding colors.

[0010] The automatic verification display driving board output device of the present application has the advantages that, unlike the prior art, the image data output by the signal generator is transmitted to the data verification board through the display driving board, and is received, processed and output through the Scaler chip on the data verification board, so that the problem of image distortion caused by various reasons can be reflected in the result data output by the Scaler chip; the data verification board with the Scaler chip is used to replace the display screen to directly obtain the output data of the display driving board, without the need to use different display screens to display the verification result, and without the need to use external photographing equipment, so that the collected data is more accurate, the verification result is more reliable, and the cost of equipment required for verification is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a schematic diagram of a verification display driving board output device used in the prior art;

[0012] Figure 2 is another schematic diagram of a verification display driving board output device used in the prior art;

[0013] Figure 3 is a schematic diagram of an automatic verification display driving board output device in an embodiment of the present application;

[0014] Figure 4 is a schematic diagram of a Scaler chip in an embodiment of the present application;

[0015] Figure 5Schematic diagram of a standard test chart and its corresponding histogram in an embodiment of the present invention;

[0016] Figure 6 Schematic diagram of the measured verification comparison image in the embodiment of the present utility model;

[0017] Figure 7 This is a logic flow chart of the device verification of the automatic verification display driver board output in the embodiment of the present utility model;

[0018] Names and numbers in the figure: signal generator 1; data verification board 2; display driver board 3; scaler chip 21; receiving port 211; image signal conversion module 212; YUV signal analysis module 213; main control module 214; display screen 4; industrial camera 5; computer 6. DETAILED DESCRIPTION

[0019] The terms "first," "second," "third," and "fourth," etc., in the specification, claims, and accompanying drawings of the present invention are used to distinguish between different items, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0020] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] "Multiple" refers to two or more. "And / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0022] Moreover, the terms "up, down, front, back, left, right, upper end, lower end" and the like indicating directions are all based on the posture and position of the device or apparatus described in this solution during normal use.

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the following will combine the technical scheme in the embodiments of the utility model for clear and complete description, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0024] The utility model discloses an embodiment as shown in Figures 3 to 7 A kind of device for automatically verifying the output of display driver board, including signal generator 1 and data verification board 2, the output of signal generator 1 is electrically connected with the input of display driver board 3, the input of data verification board 2 is electrically connected with the output of display driver board 3;Scaler chip 21 is provided on data verification board 2, and Scaler chip 21 is used to receive and process the output data of display driver board 3.

[0025] Scaler chip 21 supports high input bandwidth. Specifically, in the embodiment, Scaler chip 21 includes receiving port 211, image signal conversion module 212, YUV signal analysis module 213 and main control module 214. The input of receiving port 211 is electrically connected with the output of display driver board 3 to receive RGB signal or YUV signal. Among them, image signal conversion module 212 is RGB to YUV module, the input of RGB to YUV module is electrically connected with the output of receiving port 211 to convert the received RGB signal into YUV signal. Since the signal output by display driver board 3 is generally in RGB format, it needs to be converted into YUV format by RGB to YUV module; if the signal output by display driver board 3 is in YUV format, it does not need to be converted. The specific conversion formula is as follows:

[0026]

[0027] Specifically, in the embodiment, YUV signal analysis module 213 is Histogram module, the input of Histogram module is electrically connected with the output of RGB to YUV module to perform histogram statistics on Y component in YUV signal. It is known that YUV format is a color encoding method, which is divided into Y, U and V components. Among them, Y represents luminance (Luminance or Luma), that is, gray value; U and V represent chrominance (Chrominance or Chroma), which are used to describe the color and saturation of the image. Therefore, the Histogram module performs histogram statistics on the Y component in the transmitted YUV signal. Generally, the data range of Y component is divided into 16 or 32 segments, and the number of pixels falling into each segment is counted. The attached drawing is three kinds of standard test chart and its corresponding histogram diagram.

[0028] Specifically, in this embodiment, the main control module 214 is a CPU, and the input end of the CPU is electrically connected to the output end of the Histogram module to perform normalization processing on the histogram data. The CPU obtains the histogram data transmitted by the Histogram module and normalizes the histogram data based on the total number of pixels in a frame, which is recorded as Hcap[i]. The standard histogram data of the standard test chart is Hstd[i]. The result is calculated using the Bhattacharyya coefficient formula as the basis for determining similarity. The Bhattacharyya coefficient of the two is:

[0029]

[0030] It should be noted that the Bhattacharyya coefficient calculated above is a decimal between 0 and 1. The closer the value is to 1, the more similar the two images are. Figure 6 In field applications, the threshold value can be flexibly adjusted to determine whether the output of the display driver board 3 is qualified.

[0031] Specifically, in this embodiment, the data verification board 2 is further provided with a first indicator light 22 and a second indicator light 23. The first indicator light 22 and the second indicator light 23 are respectively electrically connected to the output end of the CPU to display lights of corresponding colors, which helps relevant personnel to understand the verification results in a timely manner.

[0032] The process of using the device for automatically verifying the output of the display driver board of this embodiment to verify is shown in the attached figure. Figure 7 As shown in . Among them, the parameters of the receiving port 211 of the Scaler chip 21 need to be set to match the input signal. The parameters mainly include:

[0033] H Total: the total number of pixels in each row of the image;

[0034] H Active: the effective pixels of each line of the picture;

[0035] V Total: the total number of lines in each frame;

[0036] V Active: The number of active lines in each frame;

[0037] H Freq: line scanning frequency;

[0038] V Rate: frame refresh rate;

[0039] Pixel Clock: The total number of pixels per second

[0040] …

[0041] The Scaler chip 21 also presets timing parameters for several commonly used video modes to quickly match the input signal. For example:

[0042] 1280x 720@60Hz / 50Hz;

[0043] 1920x 1080@60Hz / 50Hz / 120Hz / 240Hz;

[0044] 2560x 1440@60Hz / 50Hz / 120Hz;

[0045] 3840x 2160@60Hz / 50Hz;

[0046] …

[0047] When used on-site, user-defined video mode timing parameters can also be edited and saved.

[0048] It should be noted that the circuit layout for realizing the corresponding functions of the RGB to YUV module, the Histogram module and the CPU may refer to an existing appropriate circuit design, and is not specifically limited in this embodiment and shall be subject to actual application.

[0049] The device for automatically verifying the output of the display driver board in the embodiment of the utility model directly obtains the output data of the display driver board 3 by replacing the display screen 4 with the data verification board 2 equipped with the Scaler chip 21. There is no need to use different display screens 4 to display the verification results, and there is no need to use external photographic equipment. The collected data is more accurate and the verification results are more reliable, which effectively reduces the equipment cost required for verification.

[0050] It should be understood that ordinary technical workers in this field can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to this utility model.

Claims

1. A device for automatically verifying the output of a display driver board, characterized in that: The device comprises a signal generator and a data verification board, wherein the output end of the signal generator is electrically connected to the input end of the display driver board, and the input end of the data verification board is electrically connected to the output end of the display driver board; a scaler chip is provided on the data verification board, and the scaler chip is used to receive and process the output data of the display driver board.

2. The device for automatically verifying the output of a display driver board according to claim 1, characterized in that: The scaler chip includes a receiving port, an input end of the receiving port is electrically connected to an output end of the display driver board to receive an RGB signal or a YUV signal.

3. The device for automatically verifying the output of a display driver board according to claim 2, characterized in that: The scaler chip further includes an image signal conversion module, the input end of which is electrically connected to the output end of the receiving port to convert the received RGB signal into a YUV signal.

4. The device for automatically verifying the output of a display driver board according to claim 3, characterized in that: The scaler chip further includes a YUV signal analysis module, the input end of which is electrically connected to the output end of the image signal conversion module to perform histogram statistics on the Y component in the YUV signal.

5. The device for automatically verifying the output of a display driver board according to claim 4, characterized in that: The Scaler chip further includes a main control module, an input end of the main control module is electrically connected to an output end of the YUV signal analysis module to perform normalization processing on the histogram data.

6. The device for automatically verifying the output of a display driver board according to claim 5, characterized in that: The data verification board is further provided with a first indicator light and a second indicator light, which are electrically connected to the output end of the main control module respectively to display lights of corresponding colors.

Images