KR-102961559-B1 - DISPLAY DEVICE AND WIRELESS VIDEO SIGNAL TRANSMISSION METHOD

KR102961559B1KR 102961559 B1KR102961559 B1KR 102961559B1KR-102961559-B1

Abstract

A display device according to the present invention comprises a main processing board that processes a VbyOne input signal to generate a corresponding video signal and wirelessly transmits the video signal through a first wireless communication unit, and a plurality of T-con board assemblies each comprising a T-con board and a second wireless communication unit, wherein the second wireless communication unit receives the video signal, distributes it to a T-con board included in the same T-con board assembly, and simultaneously wirelessly transmits it to the next transmission target T-con board assembly.

Inventors

박철순
안병남

Assignees

주식회사 와이젯

Dates

Publication Date: 20260507
Application Date: 20250826

Claims (11)

A main processing board that processes an input VbyOne signal to generate a corresponding video signal and wirelessly transmits the video signal through a first wireless communication unit, and It includes a plurality of T-con board assemblies, each comprising a T-con board and a second wireless communication unit, and The second wireless communication unit receives the video signal, distributes it to the T-con board included in the same T-con board assembly, and simultaneously wirelessly transmits it to the next transmission target T-con board assembly. The second wireless communication unit provides reception quality information, including BER and RSSI values for a video signal received from a wireless communication chip, to the control unit of the main processing board, and The control unit of the main processing board transmits the video signal by dynamically adjusting the LDPC (Low-Density Parity-Check) code rate according to the reception quality information. Display device.
In paragraph 1, The main processing board converts the video signal into wireless serial data and wirelessly transmits it through the first wireless communication unit, and The second wireless communication unit receives the wireless serial data, restores the video signal, and distributes the restored video signal to the T-con board. Display device.
In paragraph 2, The second wireless communication unit receives the wireless serial data and simultaneously wirelessly transmits the wireless serial data to the second wireless communication unit included in the next transmission target T-con board assembly in a daisy-chain manner. Display device.
In paragraph 2, The above second wireless communication unit is, A first wireless communication chip that receives the above wireless serial data, An image restoration unit that restores the above wireless serial data into the original image signal and A second wireless communication chip comprising the above wireless serial data to the first wireless communication chip of the second wireless communication unit included in the next transmission target T-con board assembly, Display device.
In paragraph 4, The second wireless communication unit is configured such that the first wireless communication chip, the image restoration unit, and the second wireless communication chip are each configured as separate hardware forms, and the first and second wireless communication chips are placed in the edge area of the T-con board assembly to prevent interference caused by the image restoration unit. Display device.
In paragraph 4, The second wireless communication unit is configured such that the image restoration unit is integrated with at least one of the first wireless communication chip and the second wireless communication chip. Other wireless communication chips not integrated with the above-mentioned integrated wireless communication chip are placed at separate locations so that the signal transmission path or physical space between the first and second wireless communication chips is not occupied by the image restoration unit. Display device.
In paragraph 1, The above T-con board controls a plurality of display modules, wherein it controls the distribution of a video signal restored from the second wireless communication unit to each of the plurality of display modules. Display device.
In paragraph 1, The first wireless communication unit detects the image resolution of the input VbyOne input signal and dynamically adjusts the compression rate for wireless transmission according to the resolution so that transmission within a limited wireless bandwidth is possible. Display device.
In paragraph 8, The first wireless communication unit above controls the compression rate to gradually increase as the resolution increases and to gradually decrease as the resolution decreases. Display device.
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In a wireless video signal transmission method performed on a display device, A step of processing the VbyOne input signal on the main processing board to generate a corresponding video signal; A step of wirelessly transmitting the image signal from the main processing board through a first wireless communication unit; and For a plurality of T-con board assemblies each comprising a T-con board and a second wireless communication unit, the second wireless communication unit receives the video signal and distributes it to a T-con board included in the same T-con board assembly, and simultaneously wirelessly transmits it to the next transmission target T-con board assembly. The step of the second wireless communication unit receiving the video signal, distributing it to a T-con board included in the same T-con board assembly, and simultaneously wirelessly transmitting it to the next transmission target T-con board assembly is The second wireless communication unit provides reception quality information, including BER and RSSI values for a video signal received from a wireless communication chip, to the control unit of the main processing board, and the control unit of the main processing board dynamically adjusts the LDPC (Low-Density Parity-Check) code rate according to the reception quality information and transmits the video signal. Wireless video signal transmission method.

Description

Display Device and Wireless Video Signal Transmission Method The present invention relates to a display device and a wireless video signal transmission method thereof. Modern display devices are rapidly advancing toward ultra-high resolution and larger sizes, and accordingly, the importance of technology for reliably transmitting high-speed, high-quality video signals is increasing. In particular, the process of transmitting high-resolution video signals generated by the main video processing board to the display panel is a key factor that determines overall video quality and operational reliability. Against this backdrop, video signal transmission standards have continuously evolved, and the transition from the existing LVDS (Low Voltage Differential Signaling) to the VbyOne standard is cited as a representative example. The VbyOne video signal standard is a high-speed video signal transmission method developed primarily by Japan's Thine to overcome the limitations of the existing LVDS standard alongside the growth of the large-screen TV market. The VbyOne standard is designed to transmit high refresh rate and high-resolution video signals using fewer signal lines and is currently adopted by most medium-to-large-sized display products. For example, while transmitting a 4K/120Hz video signal via LVDS requires approximately 48 pairs (96 lines) of signal lines, applying the VbyOne standard allows the same video to be transmitted using only about 16 pairs (32 lines). This offers the advantages of significantly reducing wiring complexity and improving issues related to skew and electromagnetic interference. However, despite the VbyOne standard significantly reducing the number of signal lines compared to existing LVDS, it still suffers from a fundamental limitation in that it operates based on physical wiring (wired cables). In large display panels, many long cables are required to connect the main board with multiple timing controller (TCON) boards, which increases the complexity of the manufacturing process and imposes constraints on wiring space on the back of the panel. Furthermore, as cable length increases, additional compensation circuits for signal attenuation and interference are required, and there is a possibility that transmission stability may deteriorate depending on the installation environment. In particular, for ultra-large or irregular displays, wired connections act as a major factor limiting design flexibility. Structures utilizing physical cables inevitably have a fixed transmission order, resulting in poor scalability and flexibility, as well as significant constraints during maintenance. These issues further highlight the need for wireless video signal transmission technology in next-generation display devices. Figure 1 is a diagram illustrating the wired cable connection configuration of a large micro LED TV in the prior art. FIG. 2 is a diagram illustrating a wireless connection configuration of a display device according to an embodiment of the present invention. FIG. 3 is a diagram illustrating the daisy-chain signal transmission process of a display device according to one embodiment of the present invention. FIG. 4 is a drawing for explaining a first wireless communication unit and a plurality of second wireless communication units in an embodiment of the present invention. FIGS. 5a to 5d are drawings illustrating first to fourth embodiments of a second wireless communication unit according to one embodiment of the present invention. FIG. 6 is a flowchart of a wireless video signal transmission method according to an embodiment of the present invention. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the present invention, and the present invention is defined only by the scope of the claims. The terms used in this specification are for describing embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. The terms "comprises" and/or "comprising" used in this specification do not exclude the presence or addition of one or more other components in addition to the components mentioned. Throughout the specification, the same reference numerals refer to the same components, and "and/or" includes each of the mentioned components and all combinations of one or more. Although terms such as "first," "second," etc., are used to describe various components, these components are not limited by these terms. These terms are used merely to