SPI-based head-up display backlight control method

A head-up display and backlight control technology, used in static indicators, cathode ray tube indicators, TVs, etc., can solve the problems of insufficient smooth display, flickering, difficult to transmit once, etc., to reduce SPI bus load and improve smoothness , Improve the display flickering effect

Active Publication Date: 2017-08-15
大陆汽车车身电子系统(芜湖)有限公司
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Problems solved by technology

[0004] In the above solution, when the backlight setting command needs to be sent, the current SPI bus may be occupied by other SPI commands, and the SPI bus resources must be released after the command is transmitted and the corresponding function is completed. It is used to send the backlight setting command, so it is difficult to ensure that the backlight setting command is transmitted every 16 or 17 milliseconds, resulting in insufficient smoothness of the backlight change and flickering on the display

Method used

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  • SPI-based head-up display backlight control method
  • SPI-based head-up display backlight control method
  • SPI-based head-up display backlight control method

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Embodiment Construction

[0014] In the following description, numerous specific details are set forth in order to enable those skilled in the art to fully understand the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. Furthermore, it should be understood that the invention is not limited to the particular embodiments described. Instead, it is conceivable to implement the present invention in any combination of the following features and elements, regardless of whether they relate to different embodiments. Accordingly, the following aspects, features, embodiments and advantages are by way of illustration only and should not be considered elements or limitations of the claims unless explicitly stated in the claims.

[0015] like figure 1 As shown, according to an embodiment of the present invention, after the vehicle controller obtains environmental parameters (such as ambient light) and user...

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Abstract

The invention relates to an SPI-based head-up display backlight control method. The method includes the following steps that: an automobile controller adopts the frequency of the video source signals of a head-up display as a frequency for backlight value calculation and performs backlight value calculation with the frequency; the automobile controller arranges a plurality of backlight values obtained through calculation into one backlight setting command and transmits the backlight setting command to an LED controller through an SPI bus; and after obtaining the backlight setting command, the LED controller applies one backlight value in the backlight setting command every time when obtaining a frame synchronization signal. With the method adopted, the load of the SPI bus is reduced, and therefore, the smoothness of backlight variation is improved, and display flicker can be alleviated.

Description

technical field [0001] The invention relates to a head-up display control technology, in particular to a SPI-based head-up display (HUD, Head-Up Display) backlight control method. Background technique [0002] The head-up display allows the driver to view some necessary information during driving without looking down, thus helping to improve driving safety and enhance the convenience of information acquisition. [0003] At present, the industry is also further developing solutions that can enhance the performance of head-up displays, such as the Digital Light Processing (DLP, Digital Light Processing) chipset launched by Texas Instruments (TI), which is designed for automotive head-up display applications. It consists of a digital micromirror device (DMD, Digital Micro-mirror Device) and a corresponding DLP controller. For the DLP head-up display application, the LED backlight control related to the display is generally completed by two controllers in coordination. One is ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32H04N5/04H04N7/01H05B44/00
CPCG09G3/32H04N5/04H04N7/01B60K35/00G09G3/3406G09G5/10G09G2320/0626G09G2350/00G09G2360/16G09G2370/04G09G2370/10G09G2380/10G02B2027/0118B60K2370/1529B60K2370/334G02B27/0101H05B45/30
Inventor 常喜
Owner 大陆汽车车身电子系统(芜湖)有限公司
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