Display testing device and display testing method
By using the multiplexing and setting circuits in the monitor testing device to dynamically adjust the image signal output, the problem of incorrect cable definition caused by inconsistent connection port arrangement in monitor testing is solved, thereby improving testing efficiency and image accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHROMA ATE (SUZHOU) CO LTD
- Filing Date
- 2024-11-22
- Publication Date
- 2026-05-22
AI Technical Summary
In existing technologies, incorrect cable definitions caused by inconsistent connection port arrangements during monitor testing result in incorrect test images, requiring additional time to confirm the connection port configuration and impacting testing efficiency.
A display testing device comprising processing circuitry, multiplexing circuitry, and connection circuitry is employed. Through the multiplexer and setting circuitry in the multiplexing circuitry, the output of the image signal is dynamically adjusted to achieve channel replacement of video channels and automatic correction of the arrangement of connection ports.
There is no need to design separate connection circuits for each monitor model, which improves testing efficiency, simplifies the connection port configuration process, and ensures the accuracy of test images.
Smart Images
Figure CN122072297A_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to image testing technology, and in particular to a display testing apparatus and a display testing method. Background Technology
[0002] With the rapid development of display technology, monitors are widely used in people's daily lives and play an increasingly important role. During the monitor manufacturing process, manufacturers need to test monitors to ensure their performance and to identify any abnormalities or damage. Therefore, "testing equipment" used to test monitors has become a crucial tool affecting production efficiency and controlling product quality. Summary of the Invention
[0003] One embodiment of this disclosure is a display testing apparatus, comprising a processing circuit, a multiplexing circuit, and a connection circuit. The processing circuit generates multiple image signals according to a test document. The multiple image signals are used to cause the display to generate a test image. The multiplexing circuit is coupled to the processing circuit and includes multiple multiplexers. Each of the multiple multiplexers is used to receive the multiple image signals and to selectively output one of the multiple image signals. The connection circuit is coupled to the multiplexing circuit and includes multiple connection ports. Each of the multiple connection ports corresponds to one of the multiple multiplexers.
[0004] In one embodiment, the multiplexing circuit further includes a setting circuit for providing a plurality of setting signals to the plurality of multiplexers, wherein the plurality of multiplexers select one of the plurality of image signals based on the plurality of setting signals.
[0005] In one embodiment, the setting circuit is further configured to change at least one of the plurality of setting signals according to a plurality of setting instructions, so that at least one of the plurality of multiplexers selects the others of the plurality of image signals.
[0006] In one embodiment, the display includes a plurality of display areas, and the plurality of image signals correspond to the plurality of display areas.
[0007] In one embodiment, the plurality of image signals are used to cause the display to generate a plurality of partial images in a test image, and the plurality of partial images have different grayscale values.
[0008] In one embodiment, the plurality of local images includes gradient images.
[0009] In one embodiment, a field-programmable gate array (FPGA) circuit is also included, which includes multiplexing circuitry.
[0010] In one embodiment, the display testing apparatus further includes memory for storing test files.
[0011] Another embodiment of this disclosure is a display testing method, comprising: generating multiple image signals according to a test document using a testing device; receiving the multiple image signals using multiple multiplexers in the testing device; each of the multiple multiplexers selectively outputting one of the multiple image signals to one of a plurality of connection ports; and providing the multiple image signals to a display through the multiple connection ports to cause the display to generate a test image.
[0012] In one embodiment, the display testing method further includes: providing a plurality of setting signals to the plurality of multiplexers via a setting circuit, so that the plurality of multiplexers select one of the plurality of image signals according to the plurality of setting signals.
[0013] In one embodiment, the display testing method further includes: a setting circuit changing at least one of the plurality of setting signals according to a plurality of setting instructions, so that at least one of the plurality of multiplexers selects the others of the plurality of image signals.
[0014] In one embodiment, the display includes a plurality of display areas, and the plurality of image signals correspond to the plurality of display areas.
[0015] In one embodiment, the display testing method further includes: generating, via the display, a plurality of local images in a test image based on the plurality of image signals, wherein the plurality of local images have different grayscale values.
[0016] In one embodiment, the plurality of local images includes gradient images.
[0017] Accordingly, by switching the video signals provided to the connection port through multiplexing circuits, the display testing device can flexibly adjust the internal definition of the video channel to accommodate displays with various connector interfaces. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of test images according to some embodiments of the present disclosure;
[0019] Figure 2 This is a schematic diagram of a display testing apparatus according to some embodiments of the present disclosure;
[0020] Figure 3 This is a schematic diagram of a display testing method according to some embodiments of the present disclosure;
[0021] Figure 4 This is a schematic diagram of test images according to some embodiments of the present disclosure.
[0022] [Symbol Explanation]
[0023] 100: Test Image
[0024] 110: Area
[0025] 120: Area
[0026] 130: Local Image
[0027] 200: Display Testing Device
[0028] 210: Processing circuit
[0029] 220: Multiplexing circuit
[0030] 221A: Multiplexer
[0031] 221B: Multiplexer
[0032] 222: Setting Circuit
[0033] 230: Connecting the circuit
[0034] 240: Memory
[0035] 250: Field Programmable Gate Array (FPGA) circuit
[0036] 400: Test Image
[0037] 410: Display area
[0038] 420: Display area
[0039] DP: Display
[0040] P11: Connection Port
[0041] P12: Connection Port
[0042] P21: Connection Port
[0043] P22: Connection Port
[0044] S1: Image signal
[0045] S2: Image signal
[0046] SA: Setting signal
[0047] SB: Setting signal
[0048] S301-S303: Steps Detailed Implementation
[0049] The following describes several embodiments of the present invention with reference to the accompanying drawings. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not essential. Furthermore, for the sake of simplicity, some conventional structures and elements will be shown in the drawings in a simple schematic manner.
[0050] In this document, when an element is referred to as a “connection” or “coupled,” it may mean an “electrical connection” or “electrical coupling.” “Connection” or “coupled” can also be used to indicate the operation or interaction between two or more elements. Furthermore, although terms such as “first,” “second,” etc., are used herein to describe different elements, these terms are merely used to distinguish elements or operations described using the same technical terminology. Unless the context clearly indicates otherwise, these terms do not specifically refer to or imply any order or sequence, nor are they intended to limit the invention.
[0051] In monitor testing procedures, the monitor under test (e.g., display panel, display screen) is coupled to a testing device (e.g., test computer, test bench) to receive image signals provided by the testing device. The monitor drives its internal pixel circuitry based on the received image signals to display the corresponding test image. By observing the displayed test image, the tester can determine if the monitor has any defects (e.g., bright spots, dark spots).
[0052] Please see Figure 1 , Figure 1 This is a schematic diagram of a test image 100 according to a partial embodiment of the present disclosure. The test image 100 may be divided into multiple regions 110 and 120, and includes multiple partial images 130. The partial images 130 may be gradient images, such as gradients of red, blue, green, or white, so that testers can clearly see the display effect of the monitor on different colors or gray levels.
[0053] Specifically, the display is coupled to the test device via multiple connection ports (or connection terminals, corresponding to different video channels), each connection port being used to transmit image signals corresponding to different areas 110 and 120 (i.e., each image signal corresponds to a different area of the test image). Figure 1 Taking the test image 100 shown as an example, the two connection ports transmit a first image signal and a second image signal respectively. The first image signal and the second image signal can be pixel signals or drive signals, and correspond to areas 110 and 120 respectively, so that the display can present the corresponding local image.
[0054] In the aforementioned testing procedure, "incorrect cable definition" is a major challenge. In other words, multiple connection ports between the monitor and the testing device must be correctly coupled for the monitor to display the correct image. "Incorrect cable definition" occurs because the monitor tester and the monitor manufacturer may not be the same person, and the tester may not be familiar with the arrangement of the monitor's multiple connection ports. If the "arrangement of multiple connection ports on the testing device is incorrect (i.e., incorrect cable definition)," the test image displayed on the monitor will also be incorrect. For example: Figure 1 Areas 110 and 120 in the text may be reversed.
[0055] For example, Company A manufactures display panels, while Company B uses these panels to design smartphones or automotive devices. Because each company's design requirements differ within their internal production processes, there is no standardized connection interface (e.g., HDMI). In this situation, when Company B tests the display panel's performance, it must first carefully consult Company A's specification manual to confirm the correct configuration order of the various connection ports and then connect the monitor and testing equipment correctly. However, this requires Company B to spend additional time confirming the correct configuration before starting the testing process.
[0056] The display testing apparatus and methods disclosed herein are intended to solve the aforementioned problems. Please refer to... Figure 2 , Figure 2 This is a schematic diagram of a display testing apparatus 200 according to a partial embodiment of the present disclosure. The display testing apparatus 200 is used to provide image signals to test a display device (DP). In one embodiment, the display device (DP) is a low-voltage differential signaling (LVDS) display device, but the present disclosure is not limited thereto.
[0057] The display testing apparatus 200 includes a processing circuit 210, a multiplexing circuit 220, and a connection circuit 230. The processing circuit 210 generates multiple image signals S1 and S2 according to a test file. The multiple image signals S1 and S2 are used to cause the display DP to generate a test image (such as...). Figure 1 Test image 100).
[0058] In one embodiment, the display testing apparatus 200 further includes a memory 240 for storing test files. The test files may be a set of test images (e.g., image patterns, i.e., image data for testing) pre-set within the display testing apparatus 200. In other embodiments, the display testing apparatus 200 may also obtain the test files from another external device (e.g., a server), and the memory 240 may be a temporary storage memory.
[0059] The multiplexing circuit 220 is coupled to the processing circuit 210 and includes multiple multiplexers. For ease of explanation, two multiplexers 221A and 221B will be used as an example below. Each multiplexer 221A and 221B is used to receive all the image signals S1 and S2 from the processing circuit 210 and selectively output one of the image signals.
[0060] In one embodiment, the multiplexing circuit 220 further includes a setting circuit 222. The setting circuit 222 receives setting commands from external sources (e.g., input devices coupled to the display testing apparatus 200, or wireless control signals sent by the tester) to generate multiple setting signals. For ease of explanation, two setting signals SA and SB will be used as an example below. The setting circuit 222 provides the setting signals SA and SB to the control terminals of the corresponding multiplexers 221A and 221B, respectively, so that the multiplexers 221A and 221B select the image signal to be output based on the setting signals SA and SB.
[0061] In one embodiment, the multiplexing circuit 220 is a field-programmable gate array (FPGA) circuit 250 disposed in the display testing device 200. In other words, the multiplexing circuit 220 may be a part of the logic circuit in the FPGA circuit.
[0062] Connection circuit 230 is coupled to multiplexer circuit 220 and includes multiple connection ports. For ease of explanation, the following will use two connection ports P11 and P12 as an example. Connection ports P11 and P12 correspond to multiplexers 221A and 221B, respectively. Figure 1 and Figure 2 As shown, the DisplayPort (DP) also includes multiple connection ports. For ease of explanation, we will use two connection ports, P21 and P22, as examples below. Connection ports P21 and P22 correspond to different display areas of the display (e.g., areas 110 and 120). In other words, the image signals transmitted by connection ports P21 and P22 are used to drive the pixel circuits in different areas.
[0063] Image signals S1 and S2 also correspond to different display areas of the monitor, used to cause the monitor DP to generate multiple corresponding local images. For example, connection port P11 should be coupled to connection port P21 to provide image signal S1 to the pixel circuit corresponding to connection port P21, and cause the monitor DP to display the corresponding image (e.g., ...). Figure 1 (As shown in area 110). Similarly, connection port P12 should be coupled to connection port P22 to provide the image signal S2 to the pixel circuit corresponding to connection port P22, and to make the display DP display the corresponding image (e.g., Figure 1(See region 120). In one embodiment, the plurality of local images may have different grayscale values, and the local images may be gradient images.
[0064] Since multiplexers 221A and 221B can be controlled to change the output signal, the display testing device 200 can achieve "channel swapping" of video channels through the multiplexing circuit 220. Accordingly, testers will not need to design corresponding connection circuits 230 for each model of display DP, and can adjust the output signal (video channel) of each connection port at any time during the test.
[0065] To illustrate the operation of the display testing device 200, the following will be used as a reference. Figure 3 For example, Figure 3 This is a schematic diagram of a display testing method according to a partial embodiment of the present disclosure. First, during testing, the connector of the display DP is coupled to the connection circuit 230 of the display testing device 200, for example, connection port P11 is coupled to connection port P21, and connection port P12 is coupled to connection port P22.
[0066] Please see Figures 1-3 In step S301, the display testing device 200 generates multiple image signals according to the test file. For ease of explanation, two image signals S1 and S2 will be used as examples below. As mentioned above, the test file can be stored in the memory 240 and represents the test image 100. That is, image signals S1 and S2 are used to make the display DP generate the test image 100.
[0067] In step S302, each multiplexer 221A and 221B in the multiplexing circuit 220 receives all the image signals S1 and S2. Simultaneously, the setting circuit 222 provides setting signals SA and SB to the corresponding multiplexers 221A and 221B, so that the multiplexers 221A and 221B select one of the image signals S1 and S2 as the output signal based on the received setting signals SA and SB.
[0068] In step S303, connection ports P11 and P12 receive image signals S1 and S2 from the corresponding multiplexers 221A and 221B, and provide image signals S1 and S2 to the display DP so that the display DP generates a test image. For example, the display DP generates multiple partial images of a first region based on image signal S1 and multiple partial images of a second region based on image signal S2, and all the partial images are used to form a complete test image.
[0069] If the test image displayed on the monitor DP does not match the expectation, it indicates an error in the connection between the monitor DP and the monitor test device 200 (i.e., the arrangement of the connection ports is incorrect). The monitor test device 200 can change the output signals of the multiplexers 221A and 221B through the setting circuit 222. Therefore, the tester does not need to go through the trouble of redesigning the arrangement of the connection ports P11 and P12 in the monitor test device 200.
[0070] Please see Figure 4 , Figure 4 These are schematic diagrams of test images according to some embodiments of this disclosure. Specifically... Figure 4 The image shown is an "incorrect" test image 400, previously revealed. Figure 1 This indicates a "correct" test image. For example... Figures 1-4 As shown, if the tester finds that the monitor DP is displaying test image 400, they can know that there is a connection error. At this time, the tester can input new setting commands into the monitor testing device 200 so that the corresponding multiplexers 221A and 221B select other image signals as output signals, thereby correcting the test image 400.
[0071] Specifically, the display DP's connection port P21 corresponds to display area 410, and the connection port P22 corresponds to display area 420. When "connection port P11 provides image signal S1 to connection port P21, and connection port P12 provides image signal S2 to connection port P22," the display DP displays test image 400. Since the tester can see that the color blocks in test image 400 are horizontally inverted, it indicates that connection port P21 should receive image signal S2, and connection port P22 should receive image signal S1. Therefore, the tester can adjust the setting command to change the output signal selected by multiplexers 221A and 221B through setting circuit 222, thereby enabling the display DP to display... Figure 1 The test image 100 shown.
[0072] In some embodiments, the setting circuit 222 uses a set of preset signals as the setting signals so that the image signals output by each multiplexer 221A and 221B are different from each other. For example, the multiplexer 221A is preset to output image signal S1 and the multiplexer 221B is preset to output image signal S2.
[0073] Furthermore, it should be noted that although the number of image signals, the number of connection ports, and the number of test image areas are all "two" in the aforementioned embodiments, this disclosure is not limited to this. In practical use, the number of "image signals, connection ports, and test image areas" can all be adjusted according to requirements.
[0074] The components, method steps, or technical features in the foregoing embodiments can be combined with each other, and are not limited to the order of textual description or the order of presentation of the drawings in this disclosure.
[0075] Although the present disclosure has been described above with reference to embodiments, it is not intended to limit the present disclosure. Any person skilled in the art may make various modifications and alterations without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the appended claims.
Claims
1. A display testing device, characterized in that, Include: A processing circuit is used to generate multiple image signals according to a test document, wherein the multiple image signals are used to cause a display to generate a test image. A multiplexing circuit coupled to the processing circuit and comprising a plurality of multiplexers, wherein each of the plurality of multiplexers is configured to receive the plurality of image signals and to selectively output one of the plurality of image signals. as well as A connection circuit coupled to the multiplexing circuit and comprising a plurality of connection ports, wherein each of the plurality of connection ports corresponds to one of the plurality of multiplexers.
2. The display testing apparatus as described in claim 1, characterized in that, The multiplexing circuit also includes a setting circuit for providing multiple setting signals to the multiple multiplexers, and the multiple multiplexers select one of the multiple image signals according to the multiple setting signals.
3. The display testing apparatus as described in claim 2, characterized in that, The setting circuit is also used to change at least one of the plurality of setting signals according to a plurality of setting instructions, so that at least one of the plurality of multiplexers selects the others of the plurality of image signals.
4. The display testing apparatus as described in claim 1, characterized in that, The display includes multiple display areas, and the multiple image signals correspond to the multiple display areas.
5. The display testing apparatus as described in claim 1, characterized in that, The plurality of image signals are used to enable the display to generate a plurality of partial images in the test image, and the plurality of partial images have different grayscale values.
6. The display testing apparatus as described in claim 5, characterized in that, The plurality of local images includes a gradient image.
7. The display testing apparatus as described in claim 1, characterized in that, It also includes a field-programmable gate array (FPGA) circuit that includes the multiplexing circuit.
8. The display testing apparatus as described in claim 1, characterized in that, It also includes a memory for storing the test file.
9. A method for testing a display, characterized in that, Include: Multiple image signals are generated based on a test file using a testing device. The multiple image signals are received through multiple multiplexers in the testing device; Each of the plurality of multiplexers selectively outputs one of the plurality of image signals to one of the plurality of connection ports; as well as The multiple image signals are provided to a display through the multiple connection ports so that the display generates a test image.
10. The display testing method as described in claim 9, characterized in that, Also includes: A setting circuit provides multiple setting signals to the multiple multiplexers, so that the multiple multiplexers select one of the multiple image signals according to the multiple setting signals.
11. The display testing method as described in claim 10, characterized in that, Also includes: The setting circuit changes at least one of the multiple setting signals according to multiple setting instructions, so that at least one of the multiple multiplexers selects the other of the multiple image signals.
12. The display testing method as described in claim 9, characterized in that, The display includes multiple display areas, and the multiple image signals correspond to the multiple display areas.
13. The display testing method as described in claim 9, characterized in that, Also includes: The display generates multiple local images in the test image based on the multiple image signals, wherein the multiple local images have different grayscale values.
14. The display testing method as described in claim 13, characterized in that, The plurality of local images includes a gradient image.