Display apparatus for video wall and operation method thereof

Patent metadata

Field	Value
Publication number	US-9787937-B1
Application number	US-201615169761-A
Country	US
Kind code	B1
Filing date	Jun 1, 2016
Priority date	Jun 1, 2016
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A display apparatus that is suitable for a video wall and an operation method thereof are provided. The display apparatus includes a display panel, a memory circuit and a video processing circuit. The memory circuit is used for storing extended display identification data (EDID), and resolution information of the EDID may affect a resolution of a video frame signal of a video source. The video processing circuit transmits the video frame signal to a video output connector. Based on a video wall configuration parameter, the video processing circuit captures part or all of pixel data in the video frame signal to obtain a captured frame, and displays the captured frame on the display panel. Based on the video wall configuration parameter, the video processing circuit can adaptively change the resolution information of the EDID stored in the memory circuit.

First claim

What is claimed is:

1. A display apparatus, comprising:
a video input connector, configured to receive a video frame signal of a video source;
a video output connector;
a display panel;
a memory circuit, configured to store extended display identification data (EDID), wherein resolution information of the EDID affects a resolution of the video frame signal of the video source; and
a video processing circuit, coupled to the video input connector, the video output connector, the memory circuit and the display panel, and configured to adaptively change the resolution information of the EDID in the memory circuit based on a video wall configuration parameter,
wherein the video processing circuit resets the resolution information of the EDID in the memory circuit as a default resolution adapted to the display panel when the video processing circuit determines that the display apparatus is not a first display apparatus of a video wall based on the video wall configuration parameter, wherein a video wall resolution adapted to the video wall is greater than the default resolution.

2. The display apparatus according to claim 1 , wherein the video input connector comprises a universal serial bus (USB) connector, a thunderbolt connector, a video graphics array (VGA) connector, a digital video interface (DVI) connector, a high definition multimedia interface (HDMI) connector, a display port (DP) connector or a mobile high-definition link (MHL) connector, the video output connector comprises a USB connector, a thunderbolt connector, a VGA connector, a DVI connector, an HDMI connector, a DP connector or an MHL connector.

3. The display apparatus according to claim 1 , wherein when the video processing circuit determines that the display apparatus is the first display apparatus of the video wall based on the video wall configuration parameter, the video processing circuit sets the resolution information of the EDID in the memory circuit as the video wall resolution adapted to the video wall based on the video wall configuration parameter.

4. The display apparatus according to claim 1 , wherein the video processing circuit transmits the video frame signal to the video output connector, captures part or all of pixel data from the video frame signal based on the video wall configuration parameter to obtain a captured frame, and display the captured frame on the display panel.

5. The display apparatus according to claim 4 , wherein the memory circuit comprises an EDID memory to store the EDID, and the video processing circuit comprises:
an interface circuit, configured to provide a user input interface to set the video wall configuration parameter;
a video bus, coupled to the video input connector and the EDID memory; and
a video processor, coupled to the video bus, the interface circuit, the video output connector and the display panel, and configured to receive the video frame signal through the video input connector and the video bus, transmit the video frame signal to the video output connector, capture part or all of the pixel data from the video frame signal based on the video wall configuration parameter set by the interface circuit to obtain the captured frame, display the captured frame on the display panel and adaptively change the resolution info′ nation of the EDID in the EDID memory based on the video wall configuration parameter set by the interface circuit.

6. The display apparatus according to claim 1 , further comprising:
a communication connector, coupled to the video processing circuit and configured to connect with the other display apparatuses of the video wall, wherein the video processing circuit obtains the number of the display apparatuses of the video wall through the communication connector; and
at least one sensor, coupled to the video processing circuit, wherein the video processing circuit obtains a position of the display apparatus in the video wall through the at least one sensor, and the number of the display apparatuses and the position are comprised in the video wall configuration parameter.

7. The display apparatus according to claim 6 , wherein the communication connector comprises a AUX channel connector, a universal asynchronous receiver-transmitter (UART) connector or an internal integrated circuit (I 2 C) connector.

8. An operation method of a display apparatus, comprising:
storing extended display identification data (EDID) in a memory circuit, wherein resolution information of the EDID affects a resolution of a video frame signal of a video source;
receiving the video frame signal of the video source through a video input connector by a video processing circuit; and
adaptively changing the resolution information of the EDID in the memory circuit based on a video wall configuration parameter by the video processing circuit, wherein the step of adaptively changing the resolution information of the EDID in the memory circuit comprises:
resetting the resolution information of the EDID in the memory circuit as a default resolution adapted to a display panel of the display apparatus by the video processing circuit when the video processing circuit determines that the display apparatus is not a first display apparatus of a video wall based on the video wall configuration parameter, wherein a video wall resolution adapted to the video wall is greater than the default resolution.

9. The operation method according to claim 8 , further comprising:
transmitting the video frame signal to a video output connector by the video processing circuit;
capturing part or all of pixel data from the video frame signal based on the video wall configuration parameter to obtain a captured frame by the video processing circuit; and
displaying the captured frame on the display panel.

10. The operation method according to claim 9 , wherein the video input connector comprises a USB connector, a thunderbolt connector, a VGA connector, a DVI connector, an HDMI connector, a DP connector or an MHL connector, and the video output connector comprises a USB connector, a thunderbolt connector, a VGA connector, a DVI connector, an HDMI connector, a DP connector or an MHL connector.

11. The operation method according to claim 8 , wherein the step of adaptively changing the resolution information of the EDID in the memory circuit comprises:
when the video processing circuit determines that the display apparatus is the first display apparatus of the video wall based on the video wall configuration parameter, setting the resolution information of the EDID in the memory circuit as the video wall resolution adapted to the video wall by the video processing circuit based on the video wall configuration parameter.

12. The operation method according to claim 8 , further comprising:
obtaining the number of the display apparatuses of the video wall through a communication connector by the video processing circuit; and
obtaining a position of the display apparatus in the video wall through at least one sensor by the video processing circuit, wherein the number of the display apparatuses and the position are comprised in the video wall configuration parameter.

13. The operation method according to claim 12 , wherein the communication connector comprises an AUX channel connector, an UART connector or an I 2 C connector.

Assignees

• Novatek Microelectronics Corp

Inventors

• Hung Chun-Wei
• Hou Chia-Hsing

Classifications

• H04N7/0122 Primary

  the input and the output signals having different aspect ratios · CPC title

• G09G2320/0606

  Manual adjustment · CPC title

• G06F3/1446

  display composed of modules, e.g. video walls · CPC title

• G09G5/005

  Adapting incoming signals to the display format of the display terminal · CPC title

• G09G2354/00

  Aspects of interface with display user · CPC title