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Power supply chip and display device

A technology for power chips and display devices, applied in static indicators, instruments, etc., can solve the problem that displays are prone to flickering screens, and achieve the effect of improving the effective time and avoiding flickering screens.

Active Publication Date: 2017-06-23
KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a power chip and a display device to solve the problem that the display is prone to flickering when it is restarted due to abnormal shutdown

Method used

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  • Power supply chip and display device
  • Power supply chip and display device
  • Power supply chip and display device

Examples

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Embodiment Construction

[0023] During normal shutdown, the display device discharges the ELVDD output voltage and the ELVSS output voltage through the FD function inside the power supply chip, so that the output terminal is completely discharged, so as to ensure that the voltage at the output terminal is 0V, so that the screen can be displayed normally when the display device is restarted. . Combine the following figure 1 and figure 2 Describe the FD function in detail.

[0024] figure 1 It is a schematic diagram of the external circuit structure of an existing power chip, such as figure 1 As shown, the power chip 10 has a fast discharge pin FD. In the external circuit of the power chip 10, the fast discharge pin FD is connected to an enable signal terminal EN, and the enable signal terminal EN sends out an enable signal. can signal to the fast discharge pin FD. The power chip 10 also has a first output pin OUT1 and a second output pin OUT2. In the external circuit of the power chip 10, the fir...

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Abstract

The invention provides a power supply chip and a display device. In an external circuit of the power supply chip, a diode is arranged between a fast discharge pin and an enable signal terminal; through a one-way conduction function of the diode, voltage on the fast discharge pin is changed from discharge at the two ends to discharge at one end when the display device is off abnormally, and an enable signal provided by the enable signal terminal can maintain a high level for a period of time, so that the effective discharge time of the fast discharge pin is prolonged, the power supply chip has enough time to discharge, and the appearance of a splash screen on the display device due to a restart moment is avoided.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a power supply chip and a display device. Background technique [0002] Active Matrix Organic Light Emitting Diode (AMOLED) display is a display technology used in TVs and mobile devices. It is sensitive to power consumption due to its low power consumption, low cost and large size. It has broad application prospects in portable electronic devices. [0003] During normal shutdown, the AMOLED display discharges the output voltage (ELVDD voltage and ELVSS voltage) through the internal fast discharge (FD) function of the power chip (Power IC), so that the output terminal is completely discharged, thereby ensuring that the output terminal voltage is 0V. However, the applicant found that the voltage of the output terminal of the Power IC cannot be fully discharged during abnormal operation (eg, abnormal power failure), and the screen flash problem occurs when the display is ...

Claims

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Application Information

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IPC IPC(8): G09G3/3225
CPCG09G3/3225G09G2320/0247G09G2330/02
Inventor 李文兴葛明伟王峥
Owner KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
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