N.s. International Ltd.

Saumil Satish Wagle

Arul Krishna

Xiao Mei Zheng

Yasuhiro Suzuki

Joe Pullukat

Ethan Hoang To

A local dimming system for a head up display (HUD) according to the present invention comprises a light array, a Fresnel lens array, a lenticular lens system, and a liquid crystal display (LCD). The Fresnel lens array is operatively associated with the light array to provide a collimated backlight output to produce an image on the LCD. The Fresnel lens array focuses light from the light array while reflecting stray light, eliminating light bleed and reducing or eliminating a display-boundary or 'postcard effect.' The Fresnel lens array is compact to enable HUD packaging necessary to configure the HUD for use in vehicles, while also removing the need for reflectors which create shadows on the LCD.

Local dimming system for head up display

The present disclosure is related to reducing shake and vibration in Head-Up Displays (HUDs) under dynamic operating conditions. The apparatus includes a curved mirror for projecting an image from a display unit on a windshield of a vehicle. The curved mirror has damping tape on its nonreflective side to absorb vibrational energy and shift the first natural frequency of the curved mirror to a higher frequency. The damping tape includes at least a viscoelastic adhesive layer and a constraining layer. The method for stabilizing the HUD includes applying damping tape selected and positioned to reduce vibrational amplitude and shift the first natural frequency of the curved mirror to a higher frequency.

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Mumbai, India

Saumil Satish Wagle