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A detection circuit and display terminal

A detection circuit, power output technology, applied in the direction of TV, electrical components, color TV, etc., can solve the problem of inconvenient manual operation of signal source selection

Active Publication Date: 2018-12-18
SHENZHEN WEIGUAN VIEWS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the embodiment of the present invention provides a detection circuit and a display terminal to solve the problem of inconvenient manual operation in signal source selection

Method used

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  • A detection circuit and display terminal
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  • A detection circuit and display terminal

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] An embodiment of the present invention provides a method for automatic signal detection and display. The method can be applied to display terminal products such as liquid crystal monitors. Such as figure 1 As shown, the method may include the following steps:

[0027] S110. Detect switching signals of HDMI, DVI, VGA and AV input terminals.

[0028]In display terminal products such as LCD monitors, the signal types of signal sources may include HDMI signals, DVI signals, VGA signals and AV signals. During the specific implementation of this step, the detection circuit may be composed of sub-circuits such as an HDMI detection circuit, a DVI detection circuit, a VGA detection circuit, and an AV detection circuit. The input signals of HDMI, DVI, VGA and AV input terminals are detected by the detection circuit; the input signals include image signals, audio signals, clock signals, synchronization signals and other data signals; also include switching signals, which are us...

Embodiment 2

[0034] On the basis of the first embodiment of the present invention, the embodiment of the present invention provides another method for automatic signal detection and display. Such as figure 2 As shown, the method may repeat steps S110, S120 and S130 after step S130 in the first embodiment. The switching signal is detected, the image signal is selected, and the image signal is displayed in a loop. In this embodiment, the preset priorities are set to HDMI, DVI, VGA, and AV input terminals in order from high to low; wherein, the AV input terminals may include the first AV input terminal and the second AV input terminal, and the first AV input terminal The preset priority can be set higher than the preset priority of the second AV input terminal. In this embodiment, in the process of returning to step S110 for looping, if it is detected that a signal is connected to an input terminal with a higher priority than the input terminal corresponding to the current display screen, ...

Embodiment 3

[0040] An embodiment of the present invention provides a detection circuit, such as Figure 3a ~ Figure 3e As shown, the detection circuit adopts a chip U11 whose model is TSUMV59XUS, and the detection circuit includes an HDMI detection circuit, a DVI detection circuit, a VGA detection circuit and a first AV detection circuit.

[0041] HDMI detection circuit includes HDMI input connector P4 and P4 is 23pin, resistors R494, R503, R508, R532, diode D112, transistor Q35; U11 pin 92 is connected to one end of R532, the other end of R532, one end of R494, R508 One end of R508, pin 18 of P4 is connected to the output terminal of the power supply, the other end of R508 and one end of R503 are connected to pin 117 of U11, the other end of R503 is connected to the base of Q35, the other end of R494, the collector of Q35 is connected to P4 The 19 pins of P4 are connected to the reference ground through D112, and the 1, 3, 4, 6, 7, 9, 10, 12, 15, and 16 pins of P4 correspond to 127, 126,...

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Abstract

The embodiment of the invention discloses an automatic signal detection and display method, a detection circuit and a display terminal. The method comprises the steps that firstly, switching signals at an HDMI input end, a DVI input end, a VGA input end and an AV input end are detected; secondly, image signals corresponding to one of the HDMI input end, the DVI input end, the VGA input end and the AV input end are selected according to the switching signals and preset priorities; thirdly, the image signals are displayed. According to the technical scheme, the automatic signal detection and display method, the detection circuit and the display terminal solve the problem that manual operation is not convenient in signal source selection.

Description

technical field [0001] The invention relates to the technical field of image display, in particular to a detection circuit and a display terminal. Background technique [0002] Currently used display terminal products such as LCD monitors have powerful functions, and have very rich signal input ports, which can be compatible with displaying various input signals. Taking the most common LCD monitor on the market as an example, its signal input port generally has two high definition multimedia interface (High Definition Multimedia Interface, HDMI) signal input ports, one video graphics array (Video Graphics Array, VGA) Signal input port, one audio and video (Audio Video, AV) signal input port, one digital video interface (Digital Visual Interface, DVI) signal port, etc. However, while bringing strong compatibility, it also brings inconvenience to users. When the user is using it, generally there is only one signal source input. In this case, if the user is not familiar with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/426H04N5/765G09G5/00
CPCG09G5/006H04N5/765H04N21/426
Inventor 龙乙平王志昴
Owner SHENZHEN WEIGUAN VIEWS TECH