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Display module driving circuit and electronic equipment

A display module and drive circuit technology, applied in the electronic field, can solve problems such as low conversion efficiency of drive circuits, achieve the effects of improving conversion efficiency, increasing output efficiency, and reducing loss

Active Publication Date: 2020-07-10
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a display module drive circuit and electronic equipment to solve the problem of low conversion efficiency of the drive circuit in the prior art under low load conditions

Method used

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  • Display module driving circuit and electronic equipment
  • Display module driving circuit and electronic equipment
  • Display module driving circuit and electronic equipment

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Embodiment Construction

[0019] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0020] figure 1 What is shown is one of the schematic diagrams of the circuit principle of the display module driving circuit provided by the embodiment of the present invention. See figure 1 , the embodiment of the present invention provides a display module driving circuit, which may include a first crystal oscillator 210 , a second crystal oscillator 220 and a selection module 300 .

[0021] The selection module 300 is electrically connected to the first crystal oscillator 210 and the second crystal oscillator 220 respectively; when the selection module 300 receives the first load input signal, the selection module 300 outputs a crystal oscillator control signal to drive the first crystal oscillator 210 and the second crystal oscillator 220 One of t...

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Abstract

The invention provides a display module driving circuit and electronic equipment. The display module driving circuit comprises a first crystal oscillator, a second crystal oscillator and a selection module, the selection module is electrically connected with the first crystal oscillator and the second crystal oscillator. Under the condition that the selection module receives the first load input signal, the selection module outputs a crystal oscillator control signal to drive one of the first crystal oscillator and the second crystal oscillator to vibrate; the vibration frequency of the firstcrystal oscillator is different from that of the second crystal oscillator. According to the driving circuit, the crystal oscillator can be matched with the load condition, so that the switching frequency of an MOSFET in the driving circuit can be reduced, the loss of the MOSFET is reduced, the DC-DC conversion efficiency in the driving circuit is improved, and the output efficiency of the drivingcircuit is improved.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a display module driving circuit and electronic equipment. Background technique [0002] The function of the drive circuit of the AMOLED (Active-matrix organic light emitting diode) screen is to supply power to the AMOLED screen through its internal DC-DC (DC-DC chopper), and through the MOSFET (Metal -Oxide-Semiconductor Field-Effect Transistor, Metal-Oxide Semiconductor Field-Effect Transistor, referred to as Metal Oxide Semiconductor Field-Effect Transistor) on / off control DC-DC to realize power supply. The PWM (PulsedWidth Modulation, pulse width modulation) mode is currently one of the main ways for the display module, especially the driving circuit of the AMOLED display module, to adjust the output voltage. The characteristics of the PWM mode are: the frequency of the modulation signal remains unchanged, but the pulse width changes, and the proportion of its high level...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3225
CPCG09G3/3225
Inventor 梁长国
Owner VIVO MOBILE COMM CO LTD