SPI-based head-up display backlight control method
AssigneeContinental Automotive GmbH
InventorXi Chang
Life of this patent
Estimating the term…
Abstract
An SPI-based HUD backlight control method places multiple backlight values obtained by calculation into a backlight setting command and transmits the same to an LED controller via an SPI bus. After obtaining the backlight setting command, the LED controller sequentially applies one backlight value in the backlight setting command each time a frame synchronization signal is obtained. The method reduces the SPI bus load, so that the smoothness of backlight variation is increased, thereby ameliorating display flicker.
Claims5
An SPI-based Head-Up Display (HUD) backlight control method for a HUD comprising a motor vehicle controller, an LED device providing backlight for display and a controller thereof, wherein the motor vehicle controller transmits a backlight setting command to the LED controller in order to perform backlight control, the method comprising:
- a frequency of a video source signal of the HUD as a backlight value calculation frequency, and calculating backlight values at this frequency;
- placing multiple backlight values obtained by calculation into a backlight setting command, and transmitting same to the LED controller via an SPI bus;
- after obtaining the backlight setting command, the LED controller sequentially applying one backlight value in the backlight setting command each time a frame synchronization signal is obtained.
Dependencies are inferred from the claim text.