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The adc sampling method of head-up display based on frame synchronization

A head-up display and frame synchronization technology, applied to static indicators, instruments, etc., can solve problems such as hardware limitations, LED controllers are difficult to meet hardware resource requirements, etc., and achieve the effect of reducing complexity and saving use

Active Publication Date: 2020-08-28
大陆汽车车身电子系统(芜湖)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of tight ports, there are certain limitations on the hardware
However, if the signals from the three detection circuits are provided to the LED controller as external interrupt signals to trigger ADC sampling of the three colors of LEDs, this will require the use of three external interrupt ports, and it is often difficult for the LED controller to meet such requirements. hardware resource requirements

Method used

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  • The adc sampling method of head-up display based on frame synchronization
  • The adc sampling method of head-up display based on frame synchronization
  • The adc sampling method of head-up display based on frame synchronization

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Embodiment Construction

[0015] 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.

[0016] The present invention makes use of the sampling timing (AST, ADC Sampling Timer) function of the DLP controller in the head-up display, so that the DLP controller generates...

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Abstract

A frame synchronization-based ADC sampling method for a head up display. The head up display comprises: an LED component for providing backlight to the display and a controller therefor, and a digital light processing controller. The method comprises: the digital light processing controller generates a frame synchronization-based time sequence signal, the time sequence signal corresponding to the connected duration of the LED of the corresponding color; the frame synchronization-based time sequence signal is transmitted to the LED controller in the form of an external interrupt signal; the LED controller triggers, on the basis of the frame synchronization-based time sequence signal, the ADC sampling for LED of the corresponding color. As ADC sampling can be triggered by just one external interrupt signal, only one external interrupt port is needed. As no detection circuit is required to detect the enable signal for the red, green, and blue LEDs, no corresponding I / O ports are necessary. Hence, LED controller ports are conserved, thereby reducing the complexity of the hardware design.

Description

technical field [0001] The invention relates to a head-up display control technology, in particular to an ADC sampling method for a head-up display based on frame synchronization. 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. For example, the Digital Light Processing (DLP, Digital Light Processing) chipset launched by Texas Instruments (TI) is designed for automotive head-up display applications. The chipset is mainly composed of A digital micromirror device (DMD, Digital Micro-mirror Device) and a corresponding DLP controller are formed. [0004] To produce a frame of video, a DLP HUD displays a very fast train of interleaved red, green, and blue pulses, which the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/00G09G3/32G09G3/34
CPCG09G3/006G09G3/32G09G3/001G09G3/3413G09G2320/0242G09G2360/145
Inventor 常喜陈家祖张威
Owner 大陆汽车车身电子系统(芜湖)有限公司