Screen lighting test equipment and system

Abstract

The invention relates to the technical field of testing of MIPI display panels, in particular to a point screen testing device and system for an MIPI display panel. The screen lighting test device comprises: a housing; the MIPI signal generation unit is arranged in the shell and selectively generates a DPHY signal or a CPHY signal; a DPHY transmission channel including a DPHY interface exposed from the housing, the DPHY transmission channel transferring a DPHY signal to the DPHY interface, the DPHY interface being physically separably connectable to a first display panel supporting a DPHY protocol to supply the DPHY signal to the first display panel; and a CPHY transmission channel separate from the DPHY transmission channel, including a CPHY interface exposed from the housing to communicate the CPHY signal to the CPHY interface, the CPHY interface being physically separably connectable to a second display panel supporting the CPHY protocol to supply the CPHY signal to the second display panel.

Description

Technical Field

[0001] The present application relates to the technical field of display panel testing, especially MIPI display panel testing, and in particular designs a dot screen testing device and system. Background Art

[0002] Before the display panel is put into use, it is necessary to use a dot screen test device to supply an image signal of a corresponding format to the display panel for dot screen testing, and based on this, the display quality of the display panel is judged.

[0003] In the related art, a dot screen test device that can generate both MIPI-DPHY signals and MIPI-CPHY signals is disclosed, but the device uses the same JAE port to output the aforementioned DPHY signals and CPHY signals. Although such technology reduces the number of output ports and helps save hardware costs, it at least brings the following problems:

[0004] DPHY is a differential signal, while CPHY is a single-ended signal, and the two have different electrical characteristics. Therefore, if an electrical device (for example, a noise filter) that matches the CPHY signal to improve the quality of the CPHY signal is configured on the multiplexed transmission channel, then when the device operates in DPHY mode, the device may not match the DPHY signal on the transmission channel, resulting in poor quality of the DPHY signal. In addition, DPHY signals are generally only suitable for short-distance communications. When the distance between the tested DPHY display panel and the dot screen test device is relatively large, a Buffer chip can be configured to amplify the DPHY signal to extend the transmission distance of the DPHY signal. However, the Buffer chip is not suitable for CPHY signals, so it is difficult to extend the transmission distance of the DPHY signal by configuring the Buffer chip, resulting in the dot screen test device being able to only operate in a short-distance docking situation with the tested display panel. Summary of the invention

[0005] In view of this, the present application proposes a point screen testing device and system.

[0006] In a first aspect, the present application proposes a point screen testing device, comprising:

[0007] case;

[0008] A MIPI signal generating unit, disposed in the housing, configured to selectively generate a DPHY signal or a CPHY signal;

[0009] a DPHY transmission channel connected to the MIPI signal generation module and comprising a DPHY interface exposed from the housing, wherein the DPHY transmission channel is configured to transmit the DPHY signal generated by the MIPI signal generation module to the DPHY interface, wherein the DPHY interface is configured to be physically detachably connected to a first display panel supporting the DPHY protocol to supply the DPHY signal to the first display panel;

[0010] A CPHY transmission channel separated from the DPHY transmission channel is connected to the MIPI signal generation module and includes a CPHY interface exposed from the shell, wherein the CPHY transmission channel is configured to transmit the CPHY signal generated by the MIPI signal generation module to the CPHY interface, and the CPHY interface is configured to be physically detachably connected to a second display panel supporting the CPHY protocol to supply the CPHY signal to the second display panel.

[0011] In some possible implementations, the CPHY transmission channel includes a noise filter disposed in the housing, and the DPHY signal generated by the MIPI signal generation module is transmitted to the CPHY interface via the noise filter.

[0012] In some possible implementations, the MIPI signal generating unit includes:

[0013] A data receiving module, configured to receive a test file from a host computer, and selectively transmit the image data in the test file to one of the following DPHY signal generating module and CPHY signal generating module according to a control instruction in the test file;

[0014] The DPHY signal generating module is configured to process the image data according to the DPHY protocol to obtain the DPHY signal;

[0015] The CPHY signal generating module is configured to process the image data according to the CPHY protocol to obtain the CPHY signal;

[0016] The DPHY transmission channel is connected to the DPHY signal generating module, and the CPHY transmission channel is connected to the CPHY signal generating module.

[0017] In some possible implementations, the following further includes:

[0018] The data interface exposed from the housing is connected to the data receiving module and is configured to be physically detachably connected to the host computer so as to transfer the test file from the host computer to the data receiving module.

[0019] In some possible implementations, the DPHY interface and the CPHY interface are both provided on the housing.

[0020] In the second aspect, a point screen test system is proposed, comprising:

[0021] The dot screen testing device as described in the first aspect;

[0022] A DPHY signal relay device, comprising a second housing separated from the housing, a buffer chip disposed in the second housing, and a DPHY input interface and a CPHY output interface respectively connected to the buffer chip;

[0023] Wherein, the DPHY input interface is configured to be physically detachably connected to the DPHY interface to transmit the DPHY signal to the Buffer chip;

[0024] The buffer chip is used to perform emphasis processing on the DPHY signal to obtain an emphasized DPHY signal;

[0025] The DPHY output interface is configured to be physically detachably connected to the first display panel to supply the emphasized DPHY signal to the first display panel.

[0026] In some possible implementations, the DPHY input interface is connected to the Buffer chip via a flexible cable, and the cable is led out from the second housing.

[0027] In some possible implementations, the DPHY output interface is connected to the Buffer chip via a flexible cable, and the cable is led out from the second housing.

[0028] In some possible implementations, the DPHY input interface is disposed on the second housing and exposed from the second housing, and the DPHY input interface is physically detachably connected to the DPHY interface via a flexible first cable;

[0029] In some possible implementations, the DPHY output interface is disposed on the second housing and exposed from the second housing, and the DPHY output interface is physically detachably connected to the first display panel via a flexible cable.

[0030] According to the point screen test equipment proposed in the present application, since the DPHY transmission channel and the CPHY transmission channel are independent of each other, and therefore the DPHY interface and the CPHY interface are separated, it is possible to easily utilize the respective corresponding electrical components to perform separate processing on the DPHY signals before and after the DPHY interface and the CPHY signals before and after the CPHY interface, thereby avoiding the problem that the processing components of the DPHY signal and the CPHY signal cannot match each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present application, rather than limiting the present application.

[0032] Figure 1 It is a structural block diagram of the point screen testing device provided in an embodiment of the present application.

[0033] Figure 2 It is a structural block diagram of the point screen testing device provided in an embodiment of the present application.

[0034] Figure 3 It is a structural block diagram of the point screen test system provided in an embodiment of the present application.

[0035] Figure 4 It is a structural block diagram of the point screen test system provided in an embodiment of the present application.

[0036] Description of reference numerals:

[0037] 1000-dot screen test system;

[0038] 100-dot screen test equipment;

[0039] 200-DPHY signal relay equipment;

[0040] 10- housing;

[0041] 20-MIPI signal generation unit

[0042] 30-DPHY transmission channel

[0043] 40-CPHY transmission channel;

[0044] 50-data interface;

[0045] 1-DPHY interface;

[0046] 2-CPHY interface;

[0047] 3- First noise filter;

[0048] 4- Second noise filter;

[0049] 5-data receiving module;

[0050] 6-DPHY signal generation module;

[0051] 7-CPHY signal generation module;

[0052] 8-Buffer chip;

[0053] 9-DPHY input interface;

[0054] 11- first cable;

[0055] 12- second cable;

[0056] 13- third cable;

[0057] 14- fourth cable;

[0058] 15- second housing;

[0059] 16-DPHY output interface. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the embodiment of the present application will be clearly and completely described below in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, rather than all the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application. It can be understood that, in the absence of conflict, some technical means of the various embodiments described herein can be replaced or combined with each other.

[0061] In the description of the specification and claims of this application, if there are terms such as "first", "second", etc., they are only used to distinguish the objects described and do not have any order or technical meaning. Therefore, the objects defined as "first", "second", etc. may explicitly or implicitly include one or more of the objects. In addition, "one" or "an" and similar words do not indicate a quantitative limitation, but indicate the existence of at least one.

[0062] Figure 1 A structural block diagram of a point screen test device 100 (hereinafter sometimes referred to as the device 100 ) provided in an embodiment of the present application is shown. The device 100 includes a housing 10 , a MIPI signal generating unit 20 , a DPHY transmission channel 30 , and a CPHY transmission channel 40 .

[0063] The housing 10 may be a rectangular parallelepiped configuration formed by sheet metal and metal ribs, and a heat dissipation mesh may be provided on at least one side of the rectangular parallelepiped.

[0064] The MIPI signal generating unit 20 is disposed in the housing 10 and is configured to selectively generate a DPHY signal or a CPHY signal. For example, the MIPI signal generating unit 20 may be formed by a PCB board and an integrated circuit device mounted on the PCB board.

[0065] The DPHY transmission channel 30 is connected to the MIPI signal generation module, and includes a DPHY interface 1 provided on the housing 10 and exposed from the housing 10. The DPHY transmission channel 30 is configured to transmit the DPHY signal generated by the MIPI signal generation module to the DPHY interface 1. The DPHY interface 1 is configured to be physically detachably connected to a first display panel supporting the DPHY protocol to supply the DPHY signal to the first display panel, so that the first display panel displays a corresponding image screen, so as to judge the display quality of the first display panel according to the image screen.

[0066] The CPHY transmission channel 40 is separately arranged from the DPHY transmission channel 30, that is, there is no multiplexing structure between the two, and they are independent of each other. The CPHY transmission channel 40 is also connected to the MIPI signal generation module, and includes a CPHY interface 2 provided on the housing 10 and exposed from the housing 10. The CPHY transmission channel 40 is configured to transmit the CPHY signal generated by the MIPI signal generation module to the CPHY interface 2. The CPHY interface 2 is configured to be physically detachably connected to a second display panel supporting the CPHY protocol to supply the CPHY signal to the second display panel, so that the second display panel displays a corresponding image screen, so as to judge the display quality of the second display panel according to the image screen.

[0067] exist Figure 1 and the following Figure 3 and Figure 4 In FIG. 1 , dotted lines are used to illustrate the first display panel and the second display panel as the test objects, and the connection paths between the first display panel, the second display panel and the device 100 .

[0068] Since the DPHY transmission channel 30 and the CPHY transmission channel 40 of the device 100 are independent of each other, and therefore the DPHY interface 1 and the CPHY interface 2 are separated, it is possible to easily use the respective corresponding electrical components to perform separate processing on the DPHY signals before and after the DPHY interface 1 and the CPHY signals before and after the CPHY interface 2, thereby avoiding the problem that the processing components of the DPHY signal and the CPHY signal cannot match each other.

[0069] For example, in Figure 1In the embodiment, the DPHY transmission channel 30 includes a first noise filter 3 disposed in the housing 10, and the DPHY signal generated by the MIPI signal generation module is transmitted to the DPHY interface 1 via the first noise filter 3. Correspondingly, the CPHY transmission channel 40 includes a second noise filter 4 disposed in the housing 10, and the DPHY signal generated by the MIPI signal generation module is transmitted to the CPHY interface 2 via the second noise filter 4. It can be understood that in order to adapt the DPHY signal and the CPHY signal respectively, the first noise filter 3 is selected to have a first feature, and the second noise filter 4 is selected to have a second feature different from the first feature. Therefore, in the DPHY signal mode, only the first noise filter 3 is involved in the processing, and the second noise filter 4 will not interfere with the signal quality. Correspondingly, in the CPHY signal mode, only the second noise filter 4 is involved in the processing, and the first noise filter 3 will not interfere with the signal quality. In contrast, if the DPHY transmission channel 30 and the CPHY transmission channel 40 are multiplexed, and thus the DPHY interface 1 and the CPHY interface 2 are the same multiplexed interface, then the noise filter on the multiplexed transmission channel can always only be better matched with one of the DPHY signal mode and the CPHY signal mode, but cannot match the other.

[0070] Since DPHY uses differential signal transmission, it has better noise immunity to electromagnetic interference, while CPHY uses serial data transmission and is suitable for some more complex communication scenarios, but is more sensitive to electromagnetic interference. Therefore, in some embodiments, for cost saving considerations, Figure 1 The first noise filter 3 is removed and only the second noise filter 4 is retained.

[0071] See also Figure 2 In some embodiments, the MIPI signal generating unit 20 includes a data receiving module 5 , a DPHY signal generating module 6 and a CPHY signal generating module 7 .

[0072] The data receiving module 5 is configured to receive a test file from a host computer, and selectively transmit the image data in the test file to one of the DPHY signal generating module 6 and the CPHY signal generating module 7 according to a control instruction in the test file.

[0073] The DPHY signal generation module 6 is configured to process the image data according to the DPHY protocol to obtain a DPHY signal. The CPHY signal generation module 7 is configured to process the image data according to the CPHY protocol to obtain a CPHY signal. The aforementioned DPHY transmission channel 30 is connected to the DPHY signal generation module 6, and the CPHY transmission channel 40 is connected to the CPHY signal generation module 7.

[0074] In addition, Figure 2 In the embodiment, the device 100 also includes a data interface 50 disposed on the shell 10 and exposed from the shell 10. The data interface 50 may be a network cable interface, which is internally connected to the data receiving module 5 and is configured to be physically separable (e.g., via a cable) to be connected to the aforementioned host computer so as to pass the aforementioned test file from the host computer to the data receiving module 5.

[0075] Next, see Figure 3 , Figure 3 The dot screen test system 1000 (hereinafter sometimes referred to as the system 1000) provided in an embodiment of the present application is shown. The system 1000 includes Figure 1 , Figure 2 The same or similar dot screen test device 100 also includes a DPHY signal relay device 200 (hereinafter, sometimes referred to as device 200).

[0076] The DPHY signal relay device 200 includes a second housing 15 separated from the housing 10 of the device 100 , a buffer chip 8 disposed in the second housing 15 , and a DPHY input interface 9 and a DPHY output interface 16 respectively connected to the buffer chip 8 .

[0077] The DPHY input interface 9 is configured to be physically detachably connected to the DPHY interface 1 to transmit the DPHY signal to the Buffer chip 8. The Buffer chip 8 is used to perform emphasis processing on the DPHY signal to obtain an emphasized DPHY signal, thereby increasing the transmission distance of the DPHY signal, so that even if the first display panel is placed at a distance, the quality-guaranteed DPHY signal can be transmitted to the first display panel.

[0078] The DPHY output interface 16 is configured to be physically detachably connected to the first display panel to supply the emphasized DPHY signal to the first display panel.

[0079] exist Figure 3 In the embodiment, the DPHY input interface 9 is connected to the buffer chip 8 via a flexible first cable 11, and the DPHY output interface 16 is connected to the buffer chip 8 via a flexible second cable 12. The first cable 11 and the second cable 12 are respectively led out of the second housing 15 by a certain length, so as to use the first cable 11 and the second cable 12 to compensate for the connection distance between the device 100 and the first display panel.

[0080] In other embodiments, Figure 4As shown, the DPHY input interface 9 of the device 200 is disposed on the second housing 15 and exposed from the second housing 15, and the DPHY output interface 16 of the device 200 is disposed on the second housing 15 and exposed from the second housing 15. The DPHY input interface 9 and the DPHY interface 1 are physically separably connected via a flexible third cable 13, and the DPHY output interface 16 and the first display panel are physically separably connected via a flexible fourth cable 14. In this way, the connection distance between the dot screen test device 100 and the first display panel can be compensated by using the additionally configured third cable 13 and fourth cable 14.

Claims

1. A point screen testing device, characterized in that: include: case; A MIPI signal generating unit, disposed in the housing, configured to selectively generate a DPHY signal or a CPHY signal; a DPHY transmission channel connected to the MIPI signal generation module and comprising a DPHY interface exposed from the housing, wherein the DPHY transmission channel is configured to transmit the DPHY signal generated by the MIPI signal generation module to the DPHY interface, wherein the DPHY interface is configured to be physically detachably connected to a first display panel supporting the DPHY protocol to supply the DPHY signal to the first display panel; A CPHY transmission channel separated from the DPHY transmission channel is connected to the MIPI signal generation module and includes a CPHY interface exposed from the shell, wherein the CPHY transmission channel is configured to transmit the CPHY signal generated by the MIPI signal generation module to the CPHY interface, and the CPHY interface is configured to be physically detachably connected to a second display panel supporting the CPHY protocol to supply the CPHY signal to the second display panel.

2. The point screen test device according to claim 1, characterized in that: The CPHY transmission channel includes a noise filter disposed in the housing, and the DPHY signal generated by the MIPI signal generation module is transmitted to the CPHY interface via the noise filter.

3. The point screen test device according to claim 1, characterized in that: The MIPI signal generating unit comprises: A data receiving module, configured to receive a test file from a host computer, and selectively transmit the image data in the test file to one of the following DPHY signal generating module and CPHY signal generating module according to a control instruction in the test file; The DPHY signal generating module is configured to process the image data according to the DPHY protocol to obtain the DPHY signal; The CPHY signal generating module is configured to process the image data according to the CPHY protocol to obtain the CPHY signal; The DPHY transmission channel is connected to the DPHY signal generating module, and the CPHY transmission channel is connected to the CPHY signal generating module.

4. The point screen test device according to claim 3, characterized in that: Also includes: The data interface exposed from the housing is connected to the data receiving module and is configured to be physically detachably connected to the host computer so as to transfer the test file from the host computer to the data receiving module.

5. The point screen test device according to claim 1, characterized in that: The DPHY interface and the CPHY interface are both arranged on the housing.

6. A point screen test system, characterized in that: include: The dot screen testing device according to any one of claims 1 to 5; A DPHY signal relay device, comprising a second housing separated from the housing, a buffer chip disposed in the second housing, and a DPHY input interface and a CPHY output interface respectively connected to the buffer chip; Wherein, the DPHY input interface is configured to be physically detachably connected to the DPHY interface to transmit the DPHY signal to the Buffer chip; The buffer chip is used to perform emphasis processing on the DPHY signal to obtain an emphasized DPHY signal; The DPHY output interface is configured to be physically detachably connected to the first display panel to supply the emphasized DPHY signal to the first display panel.

7. The point screen test system according to claim 6, characterized in that: The DPHY input interface is connected to the Buffer chip via a flexible cable, and the cable is led out from the second housing.

8. The point screen test system according to claim 6, characterized in that: The DPHY output interface is connected to the Buffer chip via a flexible cable, and the cable is led out from the second housing.

9. The point screen test system according to claim 6, characterized in that: The DPHY input interface is disposed on the second housing and exposed from the second housing, and the DPHY input interface is physically detachably connected to the DPHY interface via a flexible first cable.

10. The point screen test system according to claim 6, characterized in that: The DPHY output interface is disposed on the second housing and exposed from the second housing. The DPHY output interface is physically detachably connected to the first display panel via a flexible cable.

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