CN205751481U - The control device of display device and display device - Google Patents

Abstract

Disclose the control device of a kind of display device and corresponding display device.This control device, including: selector, select the EDID information with this pattern matched according to the data form of acquired video signal；And read write line, it is connected with selector, the EDID information selected by reading, according to the EDID information read, video signal is shown for display device.Control device and display device according to the disclosure, matched EDID data can be selected for display device by the data form according to the data form of the signal of source device input or according to user's input.In this way, improve display device and and source device between compatibility, and can farthest utilize the display resolution of display device.

Description

Control device for display device and display device

technical field

The present disclosure relates to the field of display technology, and in particular to a control device for a display device and a corresponding display device.

Background technique

Recently, digital video has become more common, and digital video provided by a multimedia source (such as a set-top box, DVD player, and PC) can usually be transmitted to a video display device (such as a TV) through a digital interface to display the digital video received from the multimedia source . The digital interface may be a digital visual interface (DVI) or a high-definition multimedia interface (HDMI) or the like. Taking the HDMI interface as an example, an HDMI source device (HDMI SOURCE), such as a DVD player, a set-top box (STB), a Blu-ray player, etc., is connected to an HDMI sink device (HDMI SINK) such as a display device TV through the HDMI interface.

Usually, the information related to the control information is described in the extended display identification data EDID on the side of the HDMI receiving device, such as the display device. EDID is a VESA standard data format used to enable display devices to support plug-and-play functionality. EDID describes the display characteristics and display capabilities of the display device itself, and the source device (such as PC, DVD, STB, etc.) outputs the signal format supported by the display device according to the corresponding attribute value of EDID.

With the development of technology, display devices supporting multiple HDMI inputs have appeared. However, in existing display devices, the EDID corresponding to each HDMI channel is fixed. When the input HDMI data of a certain channel does not match the corresponding EDID data, compatibility problems will occur, resulting in failures such as device crashes.

Utility model content

According to an aspect of the present disclosure, there is provided a control device for a display device. The control device includes: a selector, which selects the extended display identification data EDID information matching the data format according to the data format of the acquired video signal; a reader-writer, connected with the selector, reads the selected EDID information for the display device Display the video signal according to the read EDID information.

Optionally, according to an embodiment of the present disclosure, the control device may further include a memory, in which at least one item of EDID information supported by the display device is stored.

Optionally, each item of EDID information corresponds to a video signal data format, and supports different timing and bandwidth ranges.

Optionally, the memory may also be located outside the control device as an independent storage device, and communicate with the control device through a bus.

Optionally, according to an embodiment of the present disclosure, the control device further includes: a data analyzer, connected to the selector, analyzing the data format of the video signal input by the source device, and sending the analysis result to the selector device.

Optionally, the control device further includes: a communication interface, connected to the source device and the data analyzer, receiving the video signal input by the source device and providing it to the data analyzer.

Optionally, according to an embodiment of the present disclosure, the data format includes a resolution corresponding to the video signal.

Optionally, according to an embodiment of the present disclosure, the reader/writer is also connected to the memory, and reads the EDID information stored in the memory according to a user instruction and transmits it to the display device. Thus, the stored EDID information can be displayed to the user, so that the user can select or preset the EDID information to be used by the display device.

Optionally, according to an embodiment of the present disclosure, the reader/writer is also connected to the memory, and writes the modified EDID information into the memory according to the user's modification of the EDID information displayed on the display device. Thus, the EDID information stored in the memory can be changed according to the user's setting.

Optionally, according to an embodiment of the present disclosure, when the resolution of the input video signal is higher than the resolution supported by the display device, the selector selects the highest resolution supported by the display device for the display device to process the video signal. to display.

Optionally, according to an embodiment of the present disclosure, when no EDID information matching the resolution of the input video signal is stored, the selector selects a resolution supported by the display device that is closest to the resolution for display The device displays the video signal.

Optionally, according to an embodiment of the present disclosure, when receiving the EDID information selected by the user, the reader provides the selected EDID information to the source device through the communication interface, so that the source device can change the selected EDID information according to the EDID information. The data format of the output video signal. In this way, the source device can correspondingly change the data format of the signal output to the display device according to the stored EDID information, so as to be compatible with the display device.

According to another aspect of the present disclosure, a control device of a display device is provided. The control device includes: a selector, which selects the stored EDID information matching the data format according to the data format of the acquired video signal; a controller, connected with the selector, controls the display device to use the corresponding data format to display video signals.

Optionally, the control device further includes a data analyzer connected to the controller to analyze the data format of the input video signal and send the analysis result to the controller.

Optionally, the controller controls the selector to select the stored and matched EDID information according to the analyzed data format for the source device to read, and selects an appropriate resolution for the display device to display the video signal.

Optionally, the control device further includes: a graphical user interface (GUI), which displays the stored EDID information to the user for user selection, and also presets or adjusts the EDID information according to the needs of the user.

Optionally, the controller can control the selector to select the matching EDID information stored in the memory according to the data format selected by the user on the user interface, for the source device to read, and select an appropriate resolution for the display device to display video signal.

Optionally, the controller may modify the EDID information stored in the memory according to the EDID information input by the user, so as to timely adjust the EDID settings for the display device as required.

According to an embodiment of the present disclosure, a display device is provided, which includes the above-mentioned control device.

According to the embodiment of the present disclosure, a plurality of EDID data can be stored in advance, respectively corresponding to different data formats of video signals, and can be selected according to the data format of the signal input by the source device or according to the data format input by the user. The matching EDID data is used by the display device. In this way, the compatibility between the display device and the source device is improved, and the display resolution of the display device can be utilized to the greatest extent.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present disclosure more clearly, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description only relate to some embodiments of the present disclosure, rather than to the utility model. limits.

FIG. 1 is a block diagram of a video system according to an exemplary embodiment of the present disclosure;

2 is a flowchart of a control operation of a video device according to an exemplary embodiment of the present disclosure;

FIG. 3 shows a menu of user-settable EDID items displayed on a display interface of a video device according to an exemplary embodiment of the present disclosure;

FIG. 4 shows a menu of user-settable resolutions displayed on a display interface of a video device according to an exemplary embodiment of the present disclosure;

FIG. 5 shows a flow for changing an EDID of a display device according to an exemplary embodiment of the present disclosure;

6 is a block diagram of a video device according to an exemplary embodiment of the present disclosure; and

7A-7B are block diagrams of a control device for a display device according to an exemplary embodiment of the present disclosure.

detailed description

The embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present disclosure, rather than all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts also belong to the protection scope of the present disclosure.

FIG. 1 shows a block diagram of a video system according to an exemplary embodiment of the present disclosure. As shown in FIG. 1 , the video system 10 includes: a source device 20 and a display device 30 connected to each other through a digital cable 40 . In the following embodiments, for ease of discussion, an HDMI interface is taken as an example to describe principles of embodiments of the present disclosure. It should be noted, however, that the present principles are not limited to video systems employing an HDMI interface, but can be applied to video systems employing other digital interfaces, such as employing a DVI interface.

As an example, the source device 20 includes a processor 210 , a memory 220 , and an HDMI communication interface 230 . The processor 210 is connected to the memory 220 and the HDMI communication interface 230 through a bus, and controls operations of the memory 220 and the HDMI communication interface 230 . The memory 210 stores such as a control program of the source device 20, setting information on video/audio. The memory 210 may be a flash memory, a hard drive, a DVD drive, or the like. The communication interface 230 transmits video/audio signals to the display device 30 through a digital cable, such as an HDMI cable, sends related control commands to the display device 30 and receives related requests from the display device 30 .

The display device 30 outputs video/audio signals from the source device, for example, the display device 30 may be a television, a projector, a monitor, or other display devices. As an example, the display device 30 includes: a controller 310, a memory 320, a communication interface 330, and a display unit 340. The controller 310 connects the memory 320, the communication interface 330, and the display unit 340 through a bus, and controls the memory 320, the communication interface 330, and the display unit. Operation of component 340 . The memory 320 stores such as a control program, video/audio settings, eg, EDID information on the display device 30 . The memory 320 can be EEPROM, FLASH, hard disk drive, etc. The communication interface 330 receives video/audio signals and related control commands transmitted from the source device 20 via digital cables, and can send requests to the source device 20 . The display unit 340 displays the video signal processed by the controller 310 to the user, and can also serve as a man-machine interface so that the user can check and change related settings of the display device 30, for example, check and change EDID settings. Although in FIG. 1, the display unit 340 is illustrated as being integrated inside the display device 30, it should be understood that, as required, the display unit 340 can be completely connected to the display device through a signal cable as an independent unit. without departing from the principles of this disclosure.

As mentioned above, generally, the extended display identification data EDID is stored in the memory 320 of the display device, wherein the EDID includes the identification information of the display device itself and the video formats/attributes supported by the display device, for example, the EDID includes Resolutions, color spaces and availability of supported HDMI modes. Information about the EDID may be used by the source device to configure the graphics subsystem, and a portion of the information in the EDID may also be used by application software programs. For proper operation, it is generally necessary to ensure that the source device can read the contents of the EDID when the display device is turned on or off. Generally, when the source device is connected to the display device using an HDMI cable to enable data transmission, the source device reads the EDID from the display device. As mentioned above, in order to ensure the compatibility between the display device with multiple HDMI inputs and the source device, the EDID can be switched as needed to match the corresponding HDMI input, so as to avoid possible crashes and other failures of the video system . For example, when the display device supports 4K resolution, the corresponding 4K timing is added in EDID, and the corresponding supportable HDMI bandwidth and frequency are added. When the source device reads these data, there may be incompatibility or crash. It is necessary to replace the EDID data of the display device to re-match the source device to ensure the compatibility between the two. However, since the EDID corresponding to each HDMI channel is fixed in the current equipment, the switching of the EDID is not supported, so the compatibility cannot be guaranteed.

In order to solve the above problems, according to this principle, a plurality of EDID data can be pre-stored in the memory of the display device, respectively corresponding to different video signal data formats, and the matching EDID data can be selected according to the input data format. In this way, the compatibility between the display device and the source device is improved, and the display resolution of the display device can be utilized to the greatest extent.

For ease of discussion, the principle of the present disclosure is described in detail below mainly for switching the resolution in EDID information. However, it should be noted that the principles of the present disclosure are not limited to be applied only to switching the resolution of the display device, but can be extended to switch other information contained in the EDID as required, such as controlling timing, color space, display Type and other information to switch. For example, if the display device is a 4K TV as an example, the 4K timing and the corresponding supported HDMI bandwidth and frequency can be set in EDID.

A flow for a control operation of a display device according to an embodiment of the present disclosure will be specifically described below with reference to FIG. 2 . As shown in FIG. 2, S210, select the extended display identification data EDID information matching the data format according to the acquired data format; and S220, control the display device to display in the corresponding data format according to the selected EDID information.

Optionally, according to an embodiment of the present disclosure, the acquired data format includes a resolution corresponding to the video signal.

Optionally, according to an embodiment of the present disclosure, the control operation further includes: analyzing a data format of the input video signal, and selecting corresponding EDID information according to the analyzed data format. As an example, the controller 310 in the display device determines the matching EDID information by analyzing the signal received by the communication interface 330 from the source device 20 . In this way, the EDID setting for the display device to match the incoming video signal from the source device is automatically selected without user intervention. As an example, the source device may provide the display device with information about the data format of the input video signal in an explicit or implicit manner.

As another way, for example, as shown in FIG. 3 , the stored EDID information can be displayed to the user on the display part of the display device, so that the user can select a matching data format to be used by the display part. As an example, the resolution of the video input, maximum horizontal image size, maximum vertical image size, color characteristics, timing, display transfer characteristics, etc. may be displayed to the user. Optionally, the user can modify the displayed EDID information as required, and the controller 310 saves the modified EDID information into the memory 320 .

Optionally, according to an embodiment of the present disclosure, as shown in FIG. 4 , the supported resolution format may be displayed to the user on the display part of the display device, so that the user can select the resolution format to be used by the display part.

Optionally, according to an embodiment of the present disclosure, when the resolution of the input video signal is higher than the resolution supported by the display device, the display device may be set to display the video signal at the highest resolution. Specifically, if the processor 310 in the display device analyzes the received signal from the source device 20 and determines that the resolution of the input video signal is higher than the highest resolution supported by the display components of the display device , then display the video signal from the source device at the highest resolution.

Optionally, according to an embodiment of the present disclosure, when no EDID information matching the resolution of the input video signal is stored in the memory 320, in other words, when the controller 310 does not find the resolution of the input video signal When the resolution of the input video signal matches the EDID information, set the display part to display at the resolution closest to the resolution of the input video signal. In this case, the display distortion of the video signal from the source device can be minimized, and the compatibility with the source device can be guaranteed to the greatest extent.

The above describes that the EDID information stored in the display device is selected or changed according to the video signal output by the source device or the data format input by the user, so as to ensure the compatibility between the display device and the source device. As another way, optionally, the EDID information selected by the user may be provided to the source device through the communication interface 330, so that the source device changes the data format of the video signal output to the display device according to the EDID information. For example, as shown in Figure 4, when the user selects the corresponding resolution according to the resolution list displayed on the display part, for example, the selected resolution is transmitted to the source device through the communication interface of the display device, so that the source The device can adjust the resolution format of the video signal input to the display device in real time, thereby ensuring that the input video signal matches the resolution selected by the user, thereby improving compatibility with the display device.

FIG. 5 shows an operation flow for changing an EDID of a display device according to an exemplary embodiment of the present disclosure. As shown in Figure 5, S500, the display device judges whether to perform HDMI connection; S505, after judging that the HDMI connection is performed, determines whether EDID change processing is required; S510, if EDID change processing is required, judges whether to perform EDID manually setting; S515, in the case of performing EDID setting manually, display the currently settable EDID information items on the display screen, prompt the user to select the corresponding information item and set it, and write the set information item into the memory (It can be the memory integrated in the display device, or it can be the memory equipped externally); when it is judged that the EDID information is not set manually, it is necessary to automatically set the EDID, S520, analyze the input of the source device to the display device The format of the video signal, and compared with the stored EDID information item, select the EDID information item that matches the format of the input video signal most, as the EDID setting of the display component displaying the video signal; or, although not shown in the figure, The selected EDID information item can also be sent to the source device, so that the source device can adjust the data format of the video signal sent to the display device, thereby ensuring the compatibility between the source device and the display device.

Fig. 6 shows a control device for a display device according to an exemplary embodiment of the present disclosure. As shown in Figure 6, the control device may include: a selector 610, which selects EDID information matching the data format according to the acquired data format; a reader/writer 620, connected with the selector 610, to read the selected EDID information, For the display device to display according to the read EDID information.

Optionally, according to an embodiment of the present disclosure, the control device may further include a memory 630, wherein at least one item of extended display identification data EDID information supported by the display device is stored.

Optionally, each item of EDID information corresponds to a video signal data format, and supports different timing and bandwidth ranges.

Optionally, the memory 630 may also be located outside the control device as an independent storage device, and communicate with the control device through a bus.

Optionally, according to an embodiment of the present disclosure, the control device may further include: a data analyzer 640, connected to the selector 610, analyzing the data format of the video signal input by the source device, and analyzing the result of the analysis Sent to selector.

Optionally, the control device may further include: a communication interface 650, connected to the source device and the data analyzer, receiving the video signal input by the source device and providing it to the data analyzer.

Optionally, according to an embodiment of the present disclosure, the data format may include a resolution corresponding to the video signal.

Optionally, according to an embodiment of the present disclosure, the reader/writer 620 may also be connected to the memory 630, and read the EDID information stored in the memory according to a user instruction and transmit it to the display device. Thus, the stored EDID information can be displayed to the user, so that the user can select or preset the EDID information to be used by the display device.

Optionally, according to an embodiment of the present disclosure, the reader/writer 620 is also connected to the memory 630, and writes the modified EDID information into the memory 630 according to the user's modification of the EDID information displayed on the display device. Thus, the EDID information stored in the memory can be changed according to the user's setting.

Optionally, according to an embodiment of the present disclosure, when the data analyzer analyzes that the resolution of the input video signal is higher than the resolution supported by the display device, the selector selects the highest resolution stored in the memory for the display device to display.

Optionally, according to an embodiment of the present disclosure, when no EDID information matching the resolution of the input video signal is stored in the memory, the selector selects the resolution closest to the resolution for the display device to perform show.

Optionally, according to an embodiment of the present disclosure, when receiving the EDID information selected by the user, the reader provides the selected EDID information to the source device through the communication interface, so that the source device changes the selected EDID information according to the EDID information. The data format of the output video signal. In this way, the source device can correspondingly change the data format of the signal output to the display device according to the stored EDID information, so as to be compatible with the display device.

Optionally, according to the embodiments of the present disclosure, each component included in the control device can be fully implemented by using at least one of an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or a Programmable Logic Device (PLD). It can be implemented by hardware; or, it can also use hardware such as a digital signal processor (DSP), a micro control unit (MCU), and a central processing unit (CPU) in combination with program instructions stored in a memory to implement its functions.

FIG. 7A illustrates a control device of a display device according to an embodiment of the present disclosure. Similar to the control device described in FIG. 6, the control device includes: a selector 710, which selects the stored EDID information matching the data format according to the acquired data format; The EDID information controls the display device to display the video signal in the corresponding data format. Optionally, the control device may also be connected to an external memory 800, wherein the memory 800 stores at least one item of extended display identification data EDID information supported by the display device.

Optionally, each item of EDID information corresponds to a video signal data format, and supports different timing and bandwidth ranges.

As an alternative, the memory 800 can also be integrated in the control device as its internal memory.

As shown in Figure 7A, the control device also includes: a data analyzer 730, wherein the data analyzer 730 is connected with the controller 720, analyzes the data format of the input video signal, and sends the analyzed result to the controller; According to the analyzed data format, the controller 720 controls the selector to select the matching EDID information stored in the memory for the source device to read, and selects an appropriate resolution for the display device to display.

FIG. 7B illustrates another control device of a display device according to an embodiment of the present disclosure. Similar to the control device described in FIG. 7A , the control device includes: a selector 750, which searches and selects EDID information stored in the memory that matches the data format according to the acquired data format; and a controller 760, connected to the selector, According to the selected EDID information, control the display device to display in the corresponding data format. Unlike FIG. 7A , the control device also includes a graphical user interface (GUI) 770 . In fact, the control device can have a dedicated user interface or can use the controlled display device as a user interface to display the stored EDID information to the user through the communication interface for the user to choose, and can also perform EDID information according to the needs of the user. Preset or adjust. Optionally, the control device may also be connected to an external memory 820, wherein the memory 820 stores multiple pieces of extended display identification data EDID information supported by the display device. Optionally, each item of EDID information corresponds to a video signal data format, and supports different timing and bandwidth ranges.

Alternatively, the memory 820 can also be integrated in the control device as its internal memory.

Optionally, the controller can control the selector to select the matching EDID information stored in the memory according to the data format selected by the user on the user interface, for the source device to read, and select an appropriate resolution for the display device to display .

Optionally, the controller may modify the EDID information stored in the memory according to the EDID information input by the user, so as to timely adjust the EDID settings for the display device as required.

According to an embodiment of the present disclosure, a display device is provided, which includes the above-mentioned control device.

According to the embodiment of the present disclosure, a plurality of EDID data can be stored in advance, respectively corresponding to different data formats of video signals, and can be selected according to the data format of the signal input by the source device or according to the data format input by the user. The matching EDID data is used by the display device. In this way, the compatibility between the display device and the source device is improved, and the display resolution of the display device can be utilized to the greatest extent.

The above is only a specific implementation of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Anyone skilled in the art within the technical scope disclosed in the embodiments of the present disclosure can easily think of changes or Any replacement should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be determined by the protection scope of the claims.

Claims (16)

1. A control device for a display device, comprising: A selector for selecting matching extended display identification data EDID information according to the data format of the acquired video signal; and The reader/writer is connected with the selector to read the selected EDID information for the display device to display video signals according to the read EDID information. 2. The control device according to claim 1, further comprising: The memory stores at least one item of EDID information supported by the display device. 3. The control device according to claim 1, further comprising: The data analyzer is connected to the selector, analyzes the data format of the input video signal, and sends the analysis result to the selector. 4. The control device according to claim 2, wherein, according to a user instruction, the reader/writer reads the EDID information stored in the memory for the user to select or input the data format used by the display device to display video signals. 5. The control device according to claim 2, wherein the reader/writer receives the modification of the EDID information by the user, and writes the modified EDID information into the memory. 6. The control device according to any one of claims 2-5, wherein the data format includes a resolution corresponding to the video signal. 7. The control device according to claim 6, wherein, when the resolution of the input video signal is higher than the resolution supported by the display device, the selector selects the highest resolution supported by the display device for the display device to video signal for display. 8. The control device according to claim 6, wherein, when the EDID information matching the resolution of the input video signal is not stored, the selector selects a resolution supported by the display device closest to the resolution It is used for the display device to display the video signal. 9. The control device according to any one of claims 1-5, wherein the reader provides the selected EDID information to the source device, so that the source device changes the data format of the input video signal according to the EDID information. 10. A control device for a display device, comprising: The selector selects the extended display identification data EDID information matching the data format according to the data format of the acquired video signal; The controller is connected with the selector, and controls the display device to display video signals in a corresponding data format according to the selected EDID information. 11. The control device according to claim 10, further comprising a data analyzer connected to the controller, wherein the data analyzer analyzes the data format of the input video signal and sends the analyzed result to the controller. 12. The control device according to claim 11, wherein, according to the result of the analysis, the controller controls the selector to select matching EDID information. 13. The control device according to claim 10, further comprising a graphical user interface connected to the controller, wherein the graphical user interface displays EDID information to the user for selection or setting by the user. 14. The control apparatus according to claim 10, wherein the controller provides the selected EDID information to the source device so that the source device changes a data format of the input video signal according to the EDID information. 15. The control device according to any one of claims 10-14, further comprising a memory, wherein the memory stores at least one item of EDID information supported by the display device. 16. A display device, comprising the control device according to any one of claims 1-15.