Head up display system and display method of head up display system

Abstract

A head up display system is provided and includes an image source, an image adjustment device, a controller, and a reflector. The image source is adapted to output an image with an image light traveling in a light path. The image adjustment device is positioned on the light path of the image light, wherein the image adjustment device comprises a liquid crystal panel. The controller is adapted to control the image adjustment device. The reflector is adapted to reflect the image light passing through the image adjustment device to a projection screen. A display method of a head up display system is also provided in the disclosure.

1 . A head up display system, comprising:
 an image source adapted to output an intermediate image with an image light traveling in a light path;   an image adjustment device positioned on the light path of the image light, wherein the image adjustment device comprises a first liquid crystal panel;   a controller adapted to control the image adjustment device; and   a reflector adapted to reflect the image light passing through the image adjustment device to a projection screen,   wherein the image adjustment device further comprises a second liquid crystal panel positioned on the light path, and the controller controls the first liquid crystal panel and the second liquid crystal panel to operate independently.   
     
     
         2 . The head up display system of  claim 1 , wherein the first liquid crystal panel comprises a first electrode, a second electrode and a liquid crystal layer disposed between the first electrode and the second electrode. 
     
     
         3 . The head up display system of  claim 2 , wherein each of the first electrode and the second electrode completely and continuously covers an active area of the first liquid crystal panel. 
     
     
         4 . (canceled) 
     
     
         5 . The head up display system of  claim 1 , wherein the first liquid crystal panel is a phase retarder, the second liquid crystal panel is a liquid crystal lens, and the second liquid crystal panel is positioned between the first liquid crystal panel and the image source. 
     
     
         6 . The head up display system of  claim 1 , wherein the second liquid crystal panel comprises a first electrode, a second electrode and a liquid crystal layer disposed between the first electrode and the second electrode, and the first electrode, the second electrode or both is patterned into pixels. 
     
     
         7 . (canceled) 
     
     
         8 . The head up display system of  claim 1 , wherein one or both of the first liquid crystal panel and the second liquid crystal panel comprises electrodes patterned into irregular patterns. 
     
     
         9 . The head up display system of  claim 8 , wherein one of the first liquid crystal panel and the second liquid crystal panel is positioned at a first focal plane of the image source and the other of the first liquid crystal panel and the second liquid crystal panel is positioned at a second focal plane of the image source. 
     
     
         10 . The head up display system of  claim 1 , wherein the image source comprises a display panel and a light source providing an initial light to the display panel. 
     
     
         11 . The head up display system of  claim 10 , wherein the display panel comprises a liquid crystal on silicon panel-spatial light modulator. 
     
     
         12 . The head up display system of  claim 10 , wherein the light source comprises a laser light source, an LED light source, or a combination thereof. 
     
     
         13 . The head up display system of  claim 1 , wherein the reflector comprises a concave mirror. 
     
     
         14 . A display method of a head up display system, comprising:
 generating an intermediate image by an image source;   adjusting an image light of the intermediate image by an image adjustment device, wherein the image adjustment device comprises a liquid crystal panel;   reflecting the image light passing through the image adjustment device to a projection screen.   
     
     
         15 . The method of  claim 14 , wherein an imaging position of the image is adjusted by the image adjustment device. 
     
     
         16 . The method of  claim 14 , wherein a size of the intermediate image is adjusted by the image adjustment device. 
     
     
         17 . The method of  claim 14 , wherein the image adjustment device comprises a first liquid crystal panel and a second liquid crystal panel, the first liquid crystal panel is positioned at a first focal plane of the image source, the second liquid crystal panel is positioned at a second focal plane of the image source, and the first liquid crystal panel and the second liquid crystal panel operate in a diffusing mode in different time sequences.