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HDMI (high-definition multimedia interface) interface detection device and method and HDMI interface system

A technology of HDMI interface and detection device, which is applied in the field of detection, can solve the problems that cannot meet the requirements of HDMI input detection function, and the number of GPIO ports of SoC is limited, so as to meet the needs of input detection and save port resources.

Active Publication Date: 2013-04-03
SHENZHEN TCL NEW-TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] However, as terminal equipment such as monitors, projectors, and televisions are equipped with more and more HDMI interfaces, to realize HDMI input detection, each HDMI interface needs to occupy a GPIO port of a terminal equipment SoC, and the SoC The number of GPIO ports is always limited, and often cannot meet the functional requirements of each HDMI input detection in many solutions

Method used

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  • HDMI (high-definition multimedia interface) interface detection device and method and HDMI interface system
  • HDMI (high-definition multimedia interface) interface detection device and method and HDMI interface system

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Embodiment Construction

[0034] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0035] Such as figure 2 as shown, figure 2It is a circuit diagram of the HDMI interface detection device of the present invention. The HDMI interface detection device mentioned in this embodiment is connected to the source device (not shown in the figure) and the terminal device SoC, and is used to detect whether the source device has been connected and whether the terminal device SoC has completed E-EDID data preparation The HDMI interface detection device includes an HDMI interface, a first switch tube Q1 and a second switch tube Q2, the power supply terminal Pin18 of the HDMI interface is connected to the collector of the first switch tube Q1 through the first resistor R1, and the power supply terminal Pin18 of the HDMI interface is connected to the collector of the first switch tube Q1 through the first resisto...

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Abstract

The invention discloses HDMI (high-definition multimedia interface) interface detection device and method and an HDMI interface system. The device comprises an HDMI interface, a first switch tube and a second switch tube. A power supply end of the HDMI interface is connected with a collector of the first switch tube through a first resistor and is connected with a collector of the second switch tube through a second resistor. A hot plug detection end of the HDMI interface is connected with a hot plug detection control end of a terminal device through a third resistor and is connected with the collector of the first switch tube. An emitter of the first switch tube is earthed. A base of the first switch tube is connected with the collector of the second switch tube through a fourth resistor. The emitter of the second switch tube is earthed. A base of second switch tube is connected with a standby power supply end of the terminal device through a fifth resistor. The HDMI interface detection device and method and the HDMIN interface system save port resources of the terminal equipment effectively and can meet the requirement for input detection of multiple HDMI interfaces.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to an HDMI interface detection device, a detection method and an HDMI interface system. Background technique [0002] As the HDMI interface (High Definition Multimedia Interface, high-definition multimedia interface) has become the standard output interface of source equipment such as DVD, set-top boxes, PCs and various video players, terminal equipment such as monitors, projectors, and televisions More HDMI interfaces must be equipped, and real-time detection of hot plugging of HDMI interfaces is required, so that when HDMI interface access is detected, the currently displayed source can be automatically transferred to the newly connected HDMI source. Or when the HDMI interface is unplugged, the currently displayed HDMI source can be automatically transferred to other signal sources. [0003] figure 1 It is a schematic diagram of an HDMI hot plug detection (Hot Plug Detect, HPD...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/00H04N17/04
Inventor 吴有肇
Owner SHENZHEN TCL NEW-TECH CO LTD
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