HUD light path system, control method thereof and HUD display device

Abstract

The invention discloses an HUD light path system, a control method thereof and an HUD display device, and relates to the technical field of HUD display. The HUD light path system comprises a TFT display, and a light filtering unit and a curved reflector which are sequentially arranged in the light emitting direction of the TFT displayer. The light filtering unit is used for dividing the incident light along a light path into a first light beam and a second light beam, and a light sensing element is arranged in the light path of the first light beam or the second light beam and is used for sensing the light intensity of the first light beam or the second light beam, wherein the deflection angle of the curved reflector is adjustable. According to the present invention, the TFT temperature can be prevented from being too high, the display stability is improved, and the service life is prolonged.

Description

technical field [0001] The present invention relates to the field of HUD display technology, in particular to a HUD optical path system, a control method thereof, and a HUD display device. Background technique [0002] As a driving assistance system, HUD (English name: Head Up Display) can project important driving information such as speed and navigation onto the windshield in front of the driver, so that the driver can try not to bow his head, You can see important driving information such as speed and navigation without turning your head. For example, in order to understand the current vehicle speed information, the driver no longer needs to turn his eyes to the instrument cluster, but can see the information through the HUD display directly in front of the driver's eyes, which improves the safety of vehicle driving. [0003] TFT (English name: Thin Film Transistor, Thin Film Transistor), as the HUD image source control unit, is crucial to the HUD imaging. According to ...

AI Technical Summary

Problems solved by technology

According to the principle of reversibility of light, external light such as sunlight can also be focused to the TFT through the windshield glass, curved mirror and flat mirror in turn. When the sunlight is relatively strong, the continuous focus of sunlight will cause TFT temperature Increase, it is easy to cause the threshold voltage of TFT to change rapidly with the bias stress, causing confusion in the display of the image source, and the mobility will also change, affecting the resolution, and the long-term bias stress makes the threshold of the device prone to drift, TFT threshold drift It will directly cause the brightness of the pixel to change, which will affect the stability and service life of the overall display

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