DC voltage conversion circuit and display panel with the DC voltage conversion circuit

A DC voltage conversion and voltage doubling circuit technology, applied in the field of display screens, can solve the problems of different currents and the inability to adjust the output current, and achieve the effect of adjusting the current

Active Publication Date: 2019-01-11
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing DC / DC converters are directly connected to load circuits, and different load circuits require different currents. Existing DC / DC converters cannot adjust the output current to match different load circuits

Method used

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  • DC voltage conversion circuit and display panel with the DC voltage conversion circuit
  • DC voltage conversion circuit and display panel with the DC voltage conversion circuit

Examples

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Embodiment Construction

[0016] Below, various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0017] see figure 1 and figure 2 A preferred embodiment of the DC voltage conversion circuit of the display panel of the present invention includes a current source combination 73, a first voltage doubler circuit 101, a second voltage doubler circuit 105, an amplification circuit 103, a detection circuit 31, a subtractor 33, and a timing controller 50 , Regulator 71. In this embodiment, the current source combination 73 and the regulator 71 are integrated into an integrated chip.

[0018] Such as figure 2 As shown, the amplifying circuit 105 includes a PNP transistor, the emitter of the PNP transistor is used as the input terminal of the amplifying circuit, and the collector of the PNP transistor is used as the output terminal of the amplifying circuit. The base of the type triode is used as the control terminal of the amplifying circuit. ...

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PUM

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Abstract

The invention provides a direct current voltage converting circuit and a display panel. The direct current voltage conversion circuit includes a current source assembly, a first voltage multiplying circuit, a second voltage multiplying circuit, an amplifying circuit, a detection circuit, a subtractor, a time schedule controller and a regulator. An output terminal of the first voltage multiplying circuit is connected to an input terminal of the amplifying circuit. The current source assembly is connected to a control terminal of the amplifying circuit, and the second voltage amplifying circuit is connected between an output terminal of the amplifying circuit and a voltage output terminal. The detection circuit is used for detecting a current at the voltage output terminal, obtaining a detected voltage according to the current and outputting the detected voltage to the subtractor. The subtractor is used for outputting a difference between the detected voltage and a reference voltage to the time schedule controller. The time schedule controller is sued for sending a control signal to the regulator after receiving the difference. The regulator is used for selecting one of the current sources of the current source assembly according to the control signal to connect the control terminal of the amplifying circuit to adjust the current of the voltage output terminal.

Description

technical field [0001] The invention relates to the field of display screens, in particular to a DC voltage conversion circuit and a display panel with the DC voltage conversion circuit. Background technique [0002] DC / DC converters are used to convert DC voltages into DC voltages of different voltage values, and are widely used in electronic devices. Existing DC / DC converters are directly connected to load circuits. Different load circuits require different currents. Existing DC / DC converters cannot adjust output currents to match different load circuits. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the present invention provides a DC voltage conversion circuit with adjustable output current and a display panel with the DC voltage conversion circuit. [0004] A DC voltage conversion circuit, the DC voltage conversion circuit includes a current source combination, a first voltage doubler circuit, a second voltage doubler circ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/158
CPCH02M3/158
Inventor 曹丹
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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