30results about How to "Implement diffuse reflection" patented technology

The invention discloses a power-driven glass based blackboard writing projection method for teaching. A blackboard writing projection system for teaching comprises a blackboard writing projection plate (1), a background mechanism and a projector (2), wherein the background mechanism is arranged on a rear side of the blackboard writing projection plate (1) and is in close contact with the blackboard writing projection plate (1), the blackboard writing projection plate (1) is made of a transparent material, the background mechanism comprises a fixed black background plate (3) and a projection screen plate (4), the projection screen plate (4) is arranged between the fixed black background plate (3) and the blackboard writing projection plate (1) and is power-driven liquid crystal photochromic glass, the power-driven liquid crystal photochromic glass shoes a transparent state when energized and shows a white color when power is off, and the projector (2) carries out projection on the power-driven liquid crystal photochromic glass which is in a power-off state. By the blackboard writing projection system, the effective writing area can be expanded, the position or the power-off region of the power-driven liquid crystal photochromic glass can be changed to change the projection position, and thus, people at different angles can all clearly view the projected content.

The invention discloses a terminal device, which includes a device main body, a color-changing cover plate and an ultrasonic transmitter. The device main body includes a control device, and the control device controls the ultrasonic transmitter to send an ultrasonic signal. The color-changing cover plate is arranged oppositely, and the color-changing cover plate includes a base layer, a color-changing layer and a covering layer, the color-changing layer is arranged between the base layer and the covering layer, and the color-changing layer includes a substrate and is dispersedly arranged on the The structural color particles in the base material, the covering layer is a light-transmitting layer, and the base layer is connected with the main body of the device. The above solution can solve the problem that the current terminal equipment adopts the color-changing technology and has a relatively complex structure.

The invention discloses a compact illumination module. The compact illumination module is characterized in that the compact illumination module comprises a radiator (8); a groove (10) for holding a second illumination unit is formed in the radiator (8); a radiating baffle (11) which horizontally outwards extends is arranged on the upper surface of the groove (10); the upper surface of the groove (10) is upwards inclined gradually towards the radiating baffle (11) and an acute-angle included angle between the upper surface of the groove (10) and the radiating baffle (11) is alpha; a first illumination unit is arranged on the upper surface of the radiating baffle (11); the second illumination unit comprises a second light-emitting diode (LED) array (2) which is arranged on the upper surface of the groove (10) and emits light downwards and a second reflective mirror (4) arranged outside the second LED array (2). The compact illumination module is small in size, compact and simple in structure, high in universality and suitable for being widely applied and popularized.

The invention discloses an LED fluorescent powder coating technology. An aluminum alloy surface is taken as a diffuse reflection surface of an LED light source; aluminum alloy is subjected to surface treatment; the surface treatment comprises aluminum alloy anodic oxidation treatment, nano fluorescent powder surface finish treatment, nano fluorescent powder filling treatment and hole sealing treatment; the aluminum alloy surface is taken as the diffuse reflection surface and partially converts blue light emitted by an LED into yellow light through the conversion function of nano fluorescent powder, and the yellow light and the blue light are mixed to form white light. The LED fluorescent powder coating technology has the technical benefits as follows: the fluorescent powder doesn't block radiating of the LED, simultaneously, work of the fluorescent powder at higher temperature can be avoided, and the LED coating technology is a preferable technical scheme of a superhigh power LED light source.

The invention discloses a control method of a blackboard-writing projector mechanism for teaching. The blackboard-writing projector mechanism for teaching comprises a blackboard-writing projection board (1), a background mechanism and a projector (2). The background mechanism is positioned in rear of the blackboard-writing projection board (1) and is close to the blackboard-writing projection board (1). The blackboard-writing projection board (1) is made of transparent materials. The background mechanism comprises a black movable background board (3), a white movable background board (4) and a black fixed background board (5) which are sequentially arranged in rear of the blackboard-writing projection board. The area of the white movable background board (4) is equal to that of the black movable background board (3). The white movable background board (4) and the black movable background board (3) can move leftwards and rightwards under the drive of a power mechanism. By the control method, effective writing area can be increased, the position of the white movable background board can be changed to enable people at different angles to see projected content clearly, and switching of projection and projection states can be realized.

The invention discloses an ultra-thin Schroeder scatterer, which comprises a substrate, and the substrate is provided with 7×p rows and 7×q columns of square grooves, p and q are integers greater than or equal to 1, and the square grooves are The side length of the groove is 0.48λ, the depth is 0.04λ, and the groove is provided with a square neck. frequency f 0 The design, the corresponding wavelength, and the neck width w of different groove units are different, and the distribution satisfies a specific sequence. The present invention can realize the diffuse reflection of the sound wave in the broadband, and has close diffuse reflection effect compared with the traditional Schroeder scatterer, and can reduce the thickness of the material at the same time, compared with the thickness λ / 2 of the traditional Schroeder, The thickness of the present invention is only λ / 20, which is convenient for practical use.

The invention discloses a blackboard-writing projector mechanism for teaching. The blackboard-writing projector mechanism comprises a blackboard-writing projection board (1), a background mechanism and a projector (2). The background mechanism is positioned in rear of the blackboard-writing projection board (1) which is made of transparent materials. The background mechanism comprises a belt (3) and two rollers (4) for driving the belt (3) to rotate. The belt (3) sleeves the two rollers (4) and is parallel to and close to the blackboard-writing projection board (1). A black area (3.1) and a white area (3.2) are arranged on the outer side of the belt (3), wherein the area of the white area (3.2) is equal to the projection area of the projector (2). During projection, the projectors projects images onto the white area of the belt (3). By the blackboard-writing projector mechanism, effective writing area can be increased, the other side of the belt can be moved to one side close to the blackboard-writing projection board, and the white area can move along with the belt to change projection positions to enable people at different angles to see projected content clearly.

The invention discloses a power-driven glass based blackboard writing projection system. The power-driven glass based blackboard writing projection system comprises a blackboard writing projection panel (1), a background mechanism and a projector (2), wherein the background mechanism is arranged on the rear side of the blackboard writing projection panel (1) and is in close contact with the blackboard writing projection panel (1), the blackboard writing projection panel (1) is made of a transparent material, the background mechanism comprises a fixed black background plate (3) and a projection screen plate (4), the projection screen plate (4) is arranged between the fixed black background plate (3) and the blackboard writing projection panel (1) and is power-driven liquid crystal photochromic glass, the power-driven liquid crystal photochromic glass is in a transparent state when energized and is in a white color when power is off, and the projector (2) is projected on the power-off power-driven liquid crystal photochromic glass during projection. By the power-driven glass based blackboard writing projection system, the effective writing area can be expanded, the projection position can be changed by chancing the position or a power-off region of the power-driven liquid crystal photochromic glass, and people at different angles can see projection content clearly.

The invention provides an LED module with an optical diffusion layer formed to serve as a mirror around LEDs for attaining irregular reflection of light by few LEDs so as to disperse the light from an angled layer for dispersing the light angle and to secondarily dispersing light from another irregular reflection layer, thereby uniformly distributing the light on a light emitting surface when using the LED as an illumination light source member. The LED module includes the optical diffusion layer formed to include a heat radiation diffusion plate having irregularly reflecting diffusion layersformed on its both sides and a U-shaped insertion port formed in its central upper end; a light emitting section having a PCB substrate coupled into the insertion port by a press-in method, a waterproof resin layer formed on an upper surface of the PCB substrate 21, input / output connectors for power supply formed on upper surface both ends of the waterproof resin layer and the LEDs3 longitudinally disposed between the input / output connectors; and a double-sided tape longitudinally attached to the bottom of the heat radiation diffusion plate to fix the heat radiation diffusion plate to a framewith a lid.

The invention discloses a blackboard writing projection mechanism for teaching. The blackboard writing projection mechanism comprises a blackboard writing projection plate (1), a background mechanism and a projector (2), wherein the background mechanism is arranged at the rear side of the blackboard writing projection plate (1) and close to the blackboard writing projection plate (1), the blackboard writing projection plate (1) is made of a transparent material, the background mechanism comprises a black movable background plate (3), a white movable background plate (4) and a black fixed background plate (5) which are orderly arranged at the rear side of the blackboard writing projection plate, the areas of the white movable background plate (4) and the black movable background plate (3) are the same, and the white movable background plate (4) and the black movable background plate (3) can move left and right under the driving of a power mechanism. Due to the adoption of the blackboard writing projection mechanism disclosed by the invention, the effective writing area can be increased, the position of the white movable background plate can be changed so that the people at different angles can clearly see the content of the projection, and the projection and the switching of the projection states can be realized.

The invention discloses a control method of a teaching blackboard writing projection system. The teaching blackboard writing projection system comprises a backboard writing projection board (1), a background mechanism and a projector (2), wherein the background mechanism is positioned at the back side of the backboard writing projection board (1) and is arranged near the backboard writing projection board (1), the backboard writing projection board (1) is made of transparent material, the background mechanism comprises a fixed black background board (3) and a projection curtain board (4), the projection curtain board (4) is positioned between the fixed black background board (3) and the backboard writing projection board (1), the projection curtain board (4) is made of electrically-controlled liquid crystal coloring glass, the electrically-controlled liquid crystal coloring glass is transparent in the energizing process, and is white in the deenergizing process, and the projector (2) is used for projecting onto the deenergized electrically-controlled liquid crystal coloring glass in the projection process. The teaching blackboard writing projection system has the advantages that the effective writing area is increased, the projection position is changed by changing the electrically-controlled liquid crystal coloring glass area or the deenergizing area, and people at different directions can clearly watch the project content.