A single-wire control method, system, and storage device for an LED drive circuit
A technology of LED driving and control methods, applied in the direction of electric light sources, electrical components, electroluminescent light sources, etc., can solve the problems of C incompatibility, increase promotion costs, etc., and achieve the effect of reducing power consumption and resources
Active Publication Date: 2019-11-26
SICHUAN ENERGY INTERNET RES INST TSINGHUA UNIV
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Problems solved by technology
[0005] At present, most of the backlight modules of mobile phones use the single-wire protocol for dimming, so that it is compatible with the I 2 C is not compatible; if I 2 The C control protocol controls the mobile phone backlight module, which requires mobile phone manufacturers to redesign the software and hardware, and at the same time, the backlight module manufacturer also needs to redesign the interface. 2 The C interface method will greatly increase the promotion cost in the actual application promotion
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[0024] In order to make the object, technical solution and advantages of the present invention 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 used to explain the present invention, not to limit the present invention.
[0025] Any feature disclosed in this specification (including the abstract and drawings), unless specifically stated, can be replaced by other equivalent or similar purpose alternative features. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.
[0026] According to a single-line control method of an LED drive circuit provided by the present invention, the LED backlight drive chip is controlled through a single-line control protocol, so that the backlight module can work in both the backlight mode and the flash mode; the sing...
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The invention provides a single-line control method, system and storage device for an LED drive circuit. The LED backlight drive chip is controlled through a single-line control protocol, so that the backlight module can work in both the backlight mode and the flash mode; the backlight module backlight The single-line control protocol of the mode includes the chip address information field, the LED current output information field and the chip working mode field; the single-line control protocol of the flash mode of the backlight module includes the chip address information field, the LED current output information field, the chip working mode field and the flash current Output information field. When controlling the backlight and flash mode of the mobile phone with a single line, the hardware does not need to be adjusted, and the backlight and flash of the mobile phone can be controlled at the same time as long as the software is slightly changed; due to the limited I / O of the main control chip of the mobile phone, the 2 Compared with C, the resources for the main control chip can be reduced, and the power consumption of the main control chip can also be reduced.
Description
technical field [0001] The invention relates to a single-line control method, system and storage device for an LED drive circuit, and relates to the field of LED drive control. Background technique [0002] The requirements for the camera function of mobile phones are getting higher and higher, and the pixels and effects of the front camera are getting better and better. Therefore, it is hoped that the flash can also be realized when using the selfie mode. At the same time, the display screen of the current mobile phone occupies an increasing proportion Large, even full-screen, so the installation space for the flash is extremely limited. [0003] At the same time, single-line is widely used in the control of mobile phone backlight LED driver chips to adjust the brightness of the backlight. This method can reduce the dynamic power consumption of the main control chip, but the current single-line control mode is mainly used to control the brightness of the LED backlight. The...
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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00
Inventor 贺江平李伊珂伍滔
Owner SICHUAN ENERGY INTERNET RES INST TSINGHUA UNIV