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A display control board, its driving method and display

A control panel, display technology, applied in static indicators, instruments, sensors, etc., can solve the problem of headphone interface noise and other problems, and achieve the effect of improving quality

Active Publication Date: 2021-11-26
K TRONICS (SUZHOU) TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present invention provides a display control board, its driving method and display, to solve the problem of noise in the earphone interface existing in the prior art

Method used

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  • A display control board, its driving method and display
  • A display control board, its driving method and display
  • A display control board, its driving method and display

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Embodiment Construction

[0045] At present, the control chip (Scalar IC) on the motherboard of the display, regardless of whether the headphones are plugged in or not, the GPIO port always outputs signals to the headphones, which leads to noise problems in the headphones at the moment of switching on and off and when the display is working normally. . Specific as figure 1 In the design of the earphone circuit shown, it can be seen from the circuit diagram that the signal output pin EAR_OUT_L(R) of the Scalar IC will always output sound to the earphone circuit, that is, the sound output of the earphone is only realized by the hardware part. The sound signal is always transmitted in the earphone circuit, which will cause noise problems at the moment when the earphone is connected and when the display is working normally.

[0046] Aiming at the problem of noise in the earphone interface in the prior art, embodiments of the present invention provide a display control board, a driving method thereof, and ...

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PUM

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Abstract

Embodiments of the present disclosure provide a display control board, its driving method, and display, by adding a switching transistor between the first capacitor and the first inductor in the signal channel circuit for transmitting left or right ear sound, and, The on-off state of the switching transistor is controlled by an added signal selection circuit. After it is determined that the earphone interface is inserted into the earphone, the enable signal output pin of the control chip outputs the first enable signal to the signal selection circuit, and the signal selection circuit outputs the first control signal that controls the conduction of the switch transistor to ensure that the earphone has an audio signal. Output: After the headphone jack is unplugged, the enable signal output pin outputs the second enable signal, or when the headphone jack is not inserted into the earphone or when the power is turned on and off, the enable signal output pin is in a floating state, and the signal selection After receiving the second enabling signal or no signal, the circuit outputs a second control signal for controlling the switch transistor to be turned off, so as to ensure that no audio signal is output from the earphone interface.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a display control board, a driving method thereof and a display. Background technique [0002] The monitors currently used generally have headphone jacks, and the headphone jacks have noise problems at the moment of switching on and off and during normal operation. At present, the circuit design of this part of the display can only find a way to change the value of electronic components and reduce the noise every time a problem occurs, but cannot solve the problem from the source. Contents of the invention [0003] Embodiments of the present invention provide a control panel of a display, a driving method thereof and a display, so as to solve the problem of noise in an earphone interface existing in the prior art. [0004] An embodiment of the present invention provides a display control board, including: an earphone control circuit, a signal selection circuit, and a control ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R1/10G09G3/20
CPCG09G3/20H04R1/1041H04R2201/10
Inventor 何佳敏
Owner K TRONICS (SUZHOU) TECH CO LTD
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