Abstract: A display panel including a substrate, a light emitting structure layer, a C-plate, and a first bandpass polarizing reflective layer is provided. The light emitting structure layer is disposed on the substrate and includes first light emitting structures. The first light emitting structures have a first peak emission wavelength. The C-plate is disposed on a side of the light emitting structure layer away from the substrate. The first bandpass polarizing reflective layer is disposed between the light emitting structure layer and the C-plate and overlapped with the light emitting structure layer. A reflectance of the first bandpass polarizing reflective layer for light with a wavelength in a first wavelength range is greater than 20%. The first wavelength range is the first peak emission wavelength±20 nm.

Abstract: A heat pump rental management system includes a detector, a transmission unit, a cloud server, a deduction unit and an electronic apparatus. The detector detects one of a temperature, a water flow rate, a pressure, and a power consumption of a heat pump apparatus. The cloud server receives the temperature, the water flow rate, the pressure, and the power consumption of the heat pump apparatus through the transmission unit, and the cloud server generates a rental fee according to a rate corresponding to account information.

Abstract: A heat pump rental management system includes a detector, a transmission unit, a cloud server, a deduction unit and an electronic apparatus. The detector detects one of a temperature, a water flow rate, a pressure, and a power consumption of a heat pump apparatus. The cloud server receives the temperature, the water flow rate, the pressure, and the power consumption of the heat pump apparatus through the transmission unit, and the cloud server generates a rental fee according to a rate corresponding to account information.

Abstract: A projection screen including a light absorbing film and a projection film is provided. The light absorbing film includes a transparent layer and a plurality of light absorbing microstructures, where the light absorbing microstructures are embedded in the transparent layer and arranged at intervals, each of the light absorbing microstructures is asymmetrical to a reference plane, the transparent layer has two surfaces opposite to each other, and the reference plane passes through a geometric center of each of the light absorbing microstructures and is parallel to each of the surfaces, and there is a space between each of the light absorbing microstructures and each of the surfaces. The projection film and the light absorbing film are stacked on each other. A light absorbing film is also provided, and the projections screen and the light absorbing film have good optical quality.

Abstract: A writable projection screen includes a substrate, a reflective layer and a writing layer. The reflective layer is disposed on the substrate, and the writing layer has a light receiving surface. The light receiving surface is adapted to receive a projection light beam. A roughness of the light receiving surface is between 5 ?m and 30 ?m. The substrate is disposed between the reflective layer and the writing layer, or the reflective layer is disposed between the substrate and the writing layer. The writable projection screen has good quality for displaying an image and can be used for being written by a variety of pens.

Abstract: A rear projection screen includes a prism film, a first diffusion layer, a second diffusion layer and a plurality of light absorbing structures sequentially arranged in a first direction. The prism film includes a first light transmissive substrate and a plurality of prism structures. The first light transmissive substrate has a first surface away from the first diffusion layer. The prism structures are disposed on the first surface. The prism structures receive the image beam and guide the image beam to be transmitted in the first direction. The first diffusion layer and the second diffusion layer have different refractive indices. The light absorbing structures have a gap therebetween. The second diffusion layer has a second surface facing the light absorbing structures. An area occupied by an orthographic projection of the light absorbing structures on the second surface is A1, a total area of the second surface is A2, and 1?(A2?A1)/A1?5.

Abstract: A projection screen including a light absorbing film and a projection film is provided. The light absorbing film includes a transparent layer and a plurality of light absorbing microstructures, where the light absorbing microstructures are embedded in the transparent layer and arranged at intervals, each of the light absorbing microstructures is asymmetrical to a reference plane, the transparent layer has two surfaces opposite to each other, and the reference plane passes through a geometric center of each of the light absorbing microstructures and is parallel to each of the surfaces, and there is a space between each of the light absorbing microstructures and each of the surfaces. The projection film and the light absorbing film are stacked on each other. A light absorbing film is also provided, and the projections screen and the light absorbing film have good optical quality.

Abstract: A housing includes two base each having at least one sidewall, a gap defined between the two bases and a non-conductive member positioned in the gap, the sidewall has a plurality of grooves, the non-conductive member is filled into the grooves to enhance bonding strength between the non-conductive member and the two bases. An electronic device having the housing and a method of making the housing are also provided.

Abstract: A hair curler with adjustable torque includes a working portion for connected with a hair roller, a driving device for driving the working portion to rotate, a circuit board for controlling the driving device, a control portion connected with the circuit board to make the driving device drive the working portion to rotate via the circuit board, a torque detecting device connected to the working portion to detect the torque of the working portion and to send it to the circuit board, a torque display device connected with the torque detecting device for displaying the value of torque, a torque setting portion connected with the circuit board for setting a predetermined torque. When the detected torque reaches the predetermined value, the circuit board makes the driving device drive the working portion to stop rotating so as to prevent hair from over-rotated.

Abstract: A housing includes two base each having at least one sidewall, a gap defined between the two bases and a non-conductive member positioned in the gap, the sidewall has a plurality of grooves, the non-conductive member is filled into the grooves to enhance bonding strength between the non-conductive member and the two bases. An electronic device having the housing and a method of making the housing are also provided.

Abstract: A reflector, a light source module, and a display device are disclosed. The reflector includes a substrate and slant reflecting surfaces disposed on the substrate and arranged from a first side to an opposite second side of the reflector. Each slant reflecting surface has an arc-shaped orthogonal projection on the substrate and is not parallel to the substrate. The light source module includes a light guide plate, a light emitting device, and the reflector, and the display device further includes a display panel. The light guide plate has a first surface, at least one opposite second surface, and a light incident surface connecting therebetween. The reflector is disposed at one side of the second surface. The slant reflecting surfaces are parallel to the second surface but not parallel to the first surface. The reflector offers improved luminous efficiency, and the light source module and the display device offer improved brightness.

Abstract: A sliding module includes a first section, a second section, a pivot plate, a hinge module and an assist lever. Two sides of the pivot plate are respectively rotatably connected to the first section and the hinge module. The hinge module is positioned on the second section. Two ends of the assist lever are respectively rotatably connected to the first section and the second section. The first section brings the pivot plate to rotate relative to the hinge module, and elevates the assist lever, the pivot plate and the assist lever bring the first section to move and rotate relative to the second section in a tilted orientation.

Abstract: A portable electronic device includes a main body, a first cover and a second cover. The main body includes a display formed on a surface thereof. The first cover is rotatably connected to one end of the main body and the second cover is rotatably connected to another end of the main body. When the first cover and the second cover are in a closed state, the first cover and the second cover are positioned at an opposite surface of the display. When the first cover and the second cover are unfolded like wings to be in an open state, the first cover and the second cover are positioned to extend from opposite sides of the display.

Abstract: A sliding module includes a first section, a second section, a sliding member, a connecting plate, a rotary plate and an elastic member. The sliding member is rotatably connected to the first section. One end of the connecting plate slidably connected to the sliding member, and the other end of the connecting plate is rotatably connected to the second section. The rotary plate is respectively rotatably connected to the first section and the second section. One end of the elastic member is fixed to the second section, and the other end of the elastic member is fixed to the sliding member. When the sliding member slides relative to the second section and drives the connecting plate to rotate, the rotary plate rotates relative to the second section and causes the first section to move and rotate relative to the second section into a tilted orientation.

Abstract: A hinge assembly includes a receiving seat, a control member, a clutch member, a follower, a main shaft and an elastic element. The receiving seat includes a first cam surface. The control member is releasably latched with the receiving seat. The clutch member includes at least one projection. The follower includes a second cam surface engaging with the at least one projection. The receiving seat, the control member, the clutch member and the follower are placed around the shaft. The elastic element provides an elastic force for the follower. After the control member is unlocked, the second cam surface engages with the first cam surface.

Abstract: A hinge assembly includes a shaft, a main body drive member, a follower, and a resilient member. The main body drive member, the follower, and the resilient member are mounted with the shaft in turn. One end of the main body drive member has a cam. One end of the follower has a cam engaging with the cam of the main body drive member. The resilient member causes the cam of the follower to resist the cam of the main body drive member due to the decompression of the resilient member, and when the follower is manually rotated relative to the main body drive member about an angle, the follower automatically rotates relative to the main body drive member due to the decompression of the resilient member.

Abstract: A sliding module includes a first section, a second section, a pivot plate, a hinge module and an assist lever. Two sides of the pivot plate are respectively rotatably connected to the first section and the second section. The hinge module is positioned on the second section. Two ends of the assist lever are respectively rotatably connected to the first section and the hinge module. The first section brings the assist lever to rotate relative to the hinge module, and elevates the pivot plate, the pivot plate and the assist lever bring the first section to move and rotate relative to the second section in a tilted orientation.

Abstract: A hinge assembly includes a shaft, a seat made of plastic, a follower, a cam, a latching member, a resilient member, and a sleeve. The follower includes a cam surface. The seat is fixed to the follower, and the seat and the follower are placed around the shaft. The cam has a latching cam surface, the cam surface is engaged with the cam latching surface. The latching member is fixed to the cam, and the cam and the latching member are placed around the shaft. An outer diameter of the cam is smaller than the latching member. The resilient member is placed around the shaft and provides an elastic force to make the cam surface abut against the latching cam surface. The sleeve receives the cam, the latching member, and the resilient member, and the latching member engages with the sleeve.

Abstract: A hinge assembly includes a receiving seat, a control member, a clutch member, a follower, a main shaft and an elastic element. The receiving seat includes a first cam surface. The control member is releasably latched with the receiving seat. The cam includes a second cam surface. The follower includes a third cam surface engaging with the first cam surface or the second cam surface. The receiving seat, the control member, the cam and the follower are placed around the shaft. The elastic element provides an elastic force for the follower. After the control member is unlocked, the second cam surface engages with the first cam surface.

Abstract: A sliding module includes a first section, a second section, a sliding member, a rotary plate, and at least one elastic member. The sliding member is slidably engaged with the second section, and is rotatably connected to the first section. The rotary plate is respectively rotatably connected to the first section and the second section. One end of the at least one elastic member is fixed to the second section, and the other end is fixed to the sliding member. When the sliding member slides relative to the second section, the rotary plate rotates relative to the second section and causes the first section to move and rotate relative to the second section in a tilted orientation.