Patent ID: 11940721
Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 4:
5. A projection display equipment, comprising a projector and a projection display device, wherein the projection display device comprises an image displaying part comprising a display screen body and a photosensitive device configured to sense a projection light beam projected on the image displaying part and a transparent glass part connected to the image displaying part, and the photosensitive device outputs a photosensitive signal when sensing the projection light beam;
wherein the image displaying part further comprises a control module electrically connected to the display screen body and the photosensitive device to receive the photosensitive signal, and to determine a projection position of the projection light beam on the image displaying part and control a section of the display screen body corresponding to the projection position to be converted from a transparent state to an opaque state according to the photosensitive signal;
wherein the display screen body comprises a first transparent substrate and a second transparent substrate disposed opposite to the first transparent substrate, a switch device layer and a first electrode are stacked on one side of the first transparent substrate adjacent to the second transparent substrate in sequence, a second electrode is disposed on one side of the second transparent substrate adjacent to the first transparent substrate, and a liquid crystal layer is disposed between the first electrode and the second electrode;
wherein the switch device layer comprises a switch device electrically connected to the first electrode, and the control module is electrically connected to the switch device and controls the switch device to be turned on when receiving the photosensitive signal; wherein the transparent glass part is connected to the first transparent substrate, the second transparent substrate, the first electrode, and the second electrode, and the second electrode, but not directly connected to the liquid crystal layer.