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LED driving device and LED display screen

A LED drive and drive circuit technology, applied in static indicators, energy-saving control technology, instruments, etc., can solve problems such as outstanding loss, achieve zero turn-off loss, realize zero switching loss and zero conduction loss, and reduce temperature Effect

Active Publication Date: 2021-02-19
UNILUMIN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of a small pitch LED display that requires a large number of driver ICs, the above losses are particularly prominent

Method used

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  • LED driving device and LED display screen
  • LED driving device and LED display screen
  • LED driving device and LED display screen

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Embodiment Construction

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only for explaining the present invention, and are not intended to limit the present invention.

[0024] In the following description, use of suffixes such as 'module', 'part' or 'unit' for denoting elements is only for facilitating description of the present invention and has no specific meaning by itself. Therefore, 'module', 'part' or 'unit' may be used in combination.

[0025] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence.

[0026] In ...

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PUM

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Abstract

The invention discloses an LED driving device and an LED display screen. The LED driving device comprises a driving circuit, an energy storage return power supply circuit, a charging circuit and an inverter, wherein the input end of the inverter is connected with a control signal end, the output end of the inverter is connected with the driving circuit and the charging circuit, and the inverter controls and drives the driving circuit and the charging circuit to be turned on and / or turned off; and the driving circuit is connected with the energy storage return power supply circuit, the chargingcircuit and the inverter, and drives the LED. Through the embodiment of the invention, zero switching loss and zero conduction loss can be realized, the LED driving efficiency of the display screen is improved, and the temperature of the LED display screen is reduced.

Description

technical field [0001] The invention relates to the field of LED display, in particular to an LED driving device and an LED display screen. Background technique [0002] LEDs (Light Emitting Diodes, light emitting diodes) are widely used in display screens. [0003] At present, the LED driver of the LED display screen generally adopts a constant current drive circuit. In the constant current drive circuit, there is a large loss (comprising switching loss and conduction loss). Wherein, the switching loss is the driving main circuit (If and Q1) Under the action of the OE signal, the loss generated by driving the main circuit in the two stages of turning on and off the driving main circuit, the conduction loss is the loss generated by driving the main circuit after the main driving circuit is turned on. In the case of a large number of driver ICs in small-pitch LED displays, the above losses are particularly prominent. Contents of the invention [0004] In view of this, the...

Claims

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Application Information

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IPC IPC(8): G09G3/32
CPCG09G3/32Y02B20/40
Inventor 陈麟刘会明刘世良
Owner UNILUMIN GRP
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