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Backlight driving circuit of display panel and display device

A backlight drive circuit, display panel technology, applied in static indicators, instruments, etc., can solve the problems of display panel high-frequency harmonics, single voltage conversion function, strong EMI radiation, etc., to improve the scope of application and voltage conversion accuracy. High and practical experience

Pending Publication Date: 2019-04-19
CHONGQING HUIKE JINYANG TECH
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0007] In view of this, the embodiment of the present application provides a backlight driving circuit of a display panel and a display device, aiming to solve the problem that the driving circuit in the exemplary technology has a single voltage conversion function, low compatibility, and the traditional driving circuit does not adopt The harmonic suppression method leads to the problem of large high-frequency harmonics and excessive EMI radiation in the driving process of the display panel

Method used

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  • Backlight driving circuit of display panel and display device
  • Backlight driving circuit of display panel and display device
  • Backlight driving circuit of display panel and display device

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Embodiment Construction

[0061] In order to make the purpose, technical solution and advantages of the present application clearer, the present application 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 used to explain the present application, and are not intended to limit the present application.

[0062] It should be noted that harmonics refer to the noise that generates interference under the waveform of the driving signal. Harmonics will greatly affect the control stability of the circuit system, which will lead to the loss of control of the circuit system and limit the scope of application of the circuit system. Therefore, harmonics The wave has also become an important factor affecting the stability of the circuit system; exemplary, figure 1 shows the schematic waveform of the drive signal in this embodiment, as figure 1 As shown, there are obvious harmonic com...

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Abstract

The invention discloses a backlight driving circuit of a display panel and a display device. The backlight driving circuit comprises a first signal input module, a light source control module, a second signal input module, a voltage conversion branch, a harmonic elimination module and a voltage output module; the first signal input module accesses a brightness adjustment signal and performs voltage stabilization processing and filtering processing on the brightness adjustment signal; the light source control module accesses the brightness adjustment signal and generates a switch control signalaccording to the brightness adjustment signal; the second signal input module accesses a power-on signal and outputs the power supply electric energy generated by a power supply according to the power-on signal; the voltage conversion branch performs power supply electric energy according to the switch control signal to obtain a light source driving voltage; the harmonic elimination module eliminates harmonic components in the voltage conversion branch; and the voltage output module outputs the light source driving voltage.

Description

technical field [0001] The present application belongs to the technical field of electronic circuits, and in particular relates to a backlight driving circuit of a display panel and a display device. Background technique [0002] At present, the display panel has become an indispensable electronic device in people's daily life and industrial production process. The display panel is connected to the driving power to achieve the corresponding video display effect. When the amplitude of the driving power changes, the video of the display panel The display state also presents different states; furthermore, the driving technology of the display panel has an extremely important influence on the working state of the display panel. How to improve the driving stability of the display panel has become a key development point of the video display quality; and according to people's use needs , the technicians have designed various types of display panels accordingly, and each type of di...

Claims

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Application Information

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IPC IPC(8): G09G3/34
CPCG09G3/3406G09G3/3413
Inventor 王智勇孔意强
Owner CHONGQING HUIKE JINYANG TECH
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