Brightness compensation in waveguide head-up displays

The invention relates to a head-up display system comprising a laser adapted to project a holographic image; a spatial light modulator; an exit pupil replicator; a diffuser adapted to be positioned in an x-y plane at a center point of the vehicle eye ellipse, the holographic projector adapted to project a dot pattern onto the diffuser; and a controller adapted to characterize an intensity distribution of the dot pattern, store the intensity distribution therein, acquire a position of the driver's eyes, map the position of the driver's eyes to the intensity distribution of the dot pattern, and perform a correction action based on the intensity distribution at the position of the driver's eyes. 本发明涉及一种抬头显示系统，包括激光器，该激光器适于投影全息图像；空间光调制器；出瞳复制器；扩散器，该扩散器适于定位在车辆眼椭圆的中心点处的x-y平面内，该全息投影仪适于将点阵图形投影到扩散器上；和控制器，该控制器适于表征点阵图形的强度分布，将强度分布存储在其中，获取驾驶员眼睛的位置，将驾驶员眼睛的位置映射到点阵图形的强度分布，并基于驾驶员眼睛的位置处的强度分布实施校正动作。