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Automatic dimming method of vehicle information system

An in-vehicle information system and automatic dimming technology, which is applied in the field of automatic dimming of in-vehicle information systems, can solve the problems of low development efficiency, insufficient dimming method, large workload, etc., and achieve the effect of improving development efficiency.

Active Publication Date: 2017-06-06
FORYOU GENERAL ELECTRONICS
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Problems solved by technology

[0004] The method in the prior art is: according to the pre-set dimming level (such as level 5), the corresponding dimming parameters are directly solidified in the ROM, which cannot be modified.
However, the compatibility and scalability of this method are poor, because if the size and type of the screen are different or the driver IC is different, the dimming parameters need to be recalculated manually. When there are many dimming levels, many sets of dimming parameters will be generated. , the workload will be heavy, and the development efficiency will be low
[0005] Moreover, if logic control is added during dimming, the existing dimming methods cannot meet the requirements, for example:

Method used

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[0033] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings. The accompanying drawings are only for reference and description, and do not constitute a limitation to the protection scope of the present invention.

[0034] See figure 1 , the automatic dimming method of the vehicle information system provided in this embodiment mainly includes the following steps:

[0035] S1. Determine the system maximum dimming parameter SYS_Max and the system minimum dimming parameter SYS_Min.

[0036] The SYS_Max is the maximum dimming parameter of the system, which is usually determined by the properties of the display chip driver IC and the screen, and is a fixed value, such as 600; SYS_Min is the minimum dimming parameter of the system, which can be set according to the minimum brightness actually required , for example 300.

[0037] S2. Setting the dimming level n of the dimming interface.

[0038] The dimming level...

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Abstract

The invention provides an automatic dimming method of a vehicle information system. The method includes the following steps: determining the maximum dimming parameter and the minimum dimming parameter of the system; setting dimming levels of a dimming interface; determining the maximum value and the minimum value of a first adjustable range of dimming parameters in a daytime mode; determining the maximum value and the minimum value of a second adjustable range of the dimming parameters in a night mode; determining current dimming modes, and calculating corresponding dimming parameters according to the corresponding dimming modes; and adjusting the brightness of a screen according to the dimming parameters. The dimming parameters of the vehicle information system are determined automatically, and the development efficiency is increased.

Description

technical field [0001] The invention relates to the technical field of vehicle electronics, in particular to an automatic dimming method for a vehicle information system. Background technique [0002] At present, it is a standard requirement for the screen brightness of the vehicle information system to change according to the state of the car lights (on or off), and more and more car models have a dimmer function that can adjust the light brightness of the interior components, so More and more customers request that the brightness of the screen change with the dimmer in the car when the dimmer is working (night mode). [0003] The working principle of the dimmer is: by setting different dimming parameters corresponding to PWM waveforms with different duty ratios, and then driving the dimming circuit through these PWM waveforms with different duty ratios, so as to achieve the purpose of adjusting brightness. [0004] The method in the prior art is: according to the pre-set ...

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Application Information

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IPC IPC(8): H05B37/02
CPCH05B47/11Y02B20/40
Inventor 彭浩陈远周
Owner FORYOU GENERAL ELECTRONICS
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