Abstract: The projection device includes a projector housing, wherein a light source mechanism is provided on a right side of an internal bottom end of the projector housing, a lens set is arranged on a right side of the projector housing, two guide slots are vertically arranged on an inner wall on a left side of the projector housing, a lifting support is arranged on the two guide slots, the lifting support is fitted to the two guide slots via a lifting device, a first reflector is obliquely arranged on the lifting support, a second reflector is fixedly and obliquely arranged under the lifting support, and a direction of an inclination of the second reflector is opposite to a direction of an inclination of the first reflector.

Abstract: The projection device includes a projector housing, wherein a light source mechanism is provided on a right side of an internal bottom end of the projector housing, a lens set is arranged on a right side of the projector housing, two guide slots are vertically arranged on an inner wall on a left side of the projector housing, a lifting support is arranged on the two guide slots, the lifting support is fitted to the two guide slots via a lifting device, a first reflector is obliquely arranged on the lifting support, a second reflector is fixedly and obliquely arranged under the lifting support, and a direction of an inclination of the second reflector is opposite to a direction of an inclination of the first reflector.

Abstract: A fully sealed liquid crystal projection optical unit device with a high-efficiency heat dissipation function includes: a hermetically sealed housing having an accommodation space therein; a light source, a first heat pipe radiator module, a first heat dissipation fan and a second heat dissipation fan, which are disposed outside the hermetically sealed housing; a first optical module, a second optical module and a liquid crystal screen, which are installed in the hermetically sealed housing; and a second heat pipe radiator module and a driving fan, wherein the first heat dissipation fin is fixedly installed outside the hermetically sealed housing and located close to the second heat dissipation fan, the second heat dissipation fan is in communication with the first heat dissipation fin through an air duct, and the first heat dissipation fin is in communication with the second heat dissipation fin directly or through the heat pipe.

Abstract: A fully sealed liquid crystal projection optical unit device with a high-efficiency heat dissipation function includes: a hermetically sealed housing having an accommodation space therein; a light source, a first heat pipe radiator module, a first heat dissipation fan and a second heat dissipation fan, which are disposed outside the hermetically sealed housing; a first optical module, a second optical module and a liquid crystal screen, which are installed in the hermetically sealed housing; and a second heat pipe radiator module and a driving fan, wherein the first heat dissipation fin is fixedly installed outside the hermetically sealed housing and located close to the second heat dissipation fan, the second heat dissipation fan is in communication with the first heat dissipation fin through an air duct, and the first heat dissipation fin is in communication with the second heat dissipation fin directly or through the heat pipe.

Abstract: The present disclosure discloses a method for changing a landscape signal of a liquid crystal screen to a portrait mode. The method comprises: adjusting the setting of a built-in driving TCON (time controller) IC (chipset) of the LCD so as to change the input signal interface of the LCD from an MIPI (mobile industry processor interface) to a TTL (transistor-transistor level) data/timing interface+SPI (serial peripheral interface) command control interface; controlling the initialization, turning-on and turning-off of the driving TCON IC via the SPI interface, and realizing the switching among four projection modes, desktop front projection, desktop rear projection, ceiling front projection, and ceiling rear projection, by adjusting the up, down, left and right display directions of a screen output image; receiving, in real time, the landscape image outputted by a front-end video processing chip through the TTL data interface, and then displaying same in real time.