Abstract: There are provided a touch display panel and a touch display device, the touch display panel includes: a display substrate including a plurality of pixel regions and a spacer region spacing the plurality of pixel regions apart from each other; a black matrix located on a light-exiting side of the display substrate, an orthographic projection of the black matrix on the display substrate being located in the spacer region; and a touch control structure layer including a first touch pattern layer located on the light-exiting side of the display substrate, the first touch pattern layer including a plurality of first metal lines, where an orthographic projection of each first metal line on the display substrate is located in the orthographic projection of the black matrix on the display substrate, and the first metal lines are in contact with the black matrix.

Abstract: A windshield head-up display, and a method for suppressing a ghost image are disclosed. The windshield head-up display comprises an image source and a projection assembly. The image source is projected onto a windshield by means of the projection assembly, such that a first virtual image and a second virtual image are formed on the same side of the windshield. The first virtual image is closer to an eye-box region than the second virtual image. The distance from the first virtual image to the eye-box region is an imaging distance. The method comprises: measuring a ghost image value of the first virtual image and the second virtual image upon a change in the imaging distance; and if the imaging distance has increased, reducing the ghost image value of the first virtual image and the second virtual image projected by the projection assembly onto the same side of the windshield.

Abstract: A windshield head-up display, and a method for suppressing a ghost image are disclosed. The windshield head-up display comprises an image source and a projection assembly. The image source is projected onto a windshield by means of the projection assembly, such that a first virtual image and a second virtual image are formed on the same side of the windshield. The first virtual image is closer to an eye-box region than the second virtual image. The distance from the first virtual image to the eye-box region is an imaging distance. The method comprises: measuring a ghost image value of the first virtual image and the second virtual image upon a change in the imaging distance; and if the imaging distance has increased, reducing the ghost image value of the first virtual image and the second virtual image projected by the projection assembly onto the same side of the windshield.

Abstract: An HUD illumination system includes a collimation and homogenization unit and an intensity distribution adjustment unit. The collimation and homogenization unit is configured to convert an incident light source into a collimated and homogenized light beam. The intensity distribution adjustment unit is configured to illuminate with different light intensity distributions according to different points; the collimated beam in the collimation and homogenization unit has uniform illuminance on a beam cross section. The output light beam in the intensity distribution adjustment unit matches an imaging optical system in the HUD. The HUD illumination system matches the HUD optical imaging system so that the illumination beam is focused on the eyebox area, thereby improving the illumination efficiency.