Abstract: A laser processing system for accurate detection of how far away the surface of a workpiece may be includes a platform, a laser processing device, a distance detection device, and a driving device. The platform is configured for carrying at least one workpiece. Both the laser processing device and the distance detection device are arranged upon the platform. The distance detection device detects an actual distance between a surface of the workpiece and the laser processing device, and compares the preset height with the actual height. If the preset height is less than the actual height, the distance detection device emitting a warning signal to remind a worker to re-enter a new preset height.

Abstract: A laser cutting device for cutting an original product includes a laser device which is movable along a first direction and a second direction perpendicular to the first direction, and rotatable reflecting mirrors. The original product includes a stub bar, optical lenses, and connection portions corresponding to the optical lenses. The rotatable reflecting mirrors correspond to the connection portions and are positioned above the original product and aligned with the connection portions. At least two rotatable reflecting mirrors are arranged in a straight line. The laser device is located on the straight line and is configured for emitting laser beams. Each of the rotatable reflecting mirrors is configured for reflecting laser beams from the laser device toward the corresponding connection portion and is configured for rotating so as to allow the laser beams from the laser device to reach the next rotatable reflecting mirror on the straight line.

Abstract: A light guide plate includes an optically effective portion and an optical coupling portion adjoining the optically effective portion. The optically effective portion includes a first bottom surface, a light output surface opposite to the first bottom surface, and a side surface connected between the first bottom surface and the light output surface. The optical coupling portion includes a second bottom surface, a first light incident surface opposite to the side surface, a second light incident surface, a first connecting surface, and a second connecting surface. The second bottom surface is coplanar with the first bottom surface. The second light incident surface extends from the first light incident surface away from the side surface. The first connecting surface extends from the second light incident surface toward the side surface. The second connecting surface is connected between the first connecting surface and the light output surface.

Abstract: A light guide element includes a wedge-shaped light coupling member and a rectangular light guide plate. The light coupling member includes a first bottom surface, a top surface opposite to the first bottom surface, a light incident surface interconnected between the first bottom surface and the top surface, a first connecting surface parallel with and opposite to the light incident surface, a slanted surface connecting the first connecting surface to the top surface, and a reflection film formed on the top surface and the slanted surface. The light guide plate includes a second bottom surface, a light output surface opposite to the second bottom surface, and a second connecting surface perpendicularly interconnected between the second bottom surface and the light output surface. The second connecting surface connects and overlaps the first connecting surface. The height of the light incident surface is larger than that of the second connecting surface.

Abstract: A light guide plate includes a light mixing part and a visual part. The light mixing part includes a light mixing bottom surface, a light incident surface, and a top surface opposite to the light mixing bottom surface. The light incident surface is substantially perpendicular to the light mixing bottom surface and the top surface. The visual part is adjoined to the light mixing part and includes a visual bottom surface and a light emitting surface opposite to the visual bottom surface. The visual bottom surface and the light mixing bottom surface are substantially coplanar and are divided by an imaginary adjoining line. The top surface and the light emitting surface are substantially coplanar. The visual bottom surface has at least one non-dot area. The visual bottom surface forms a plurality of reflective dots except for the non-dot area.

Abstract: A backlight module includes a light guide plate and a light source module. The light guide plate includes a light incident surface. The light incident surface forms a sector-cylinder-shaped cutout on the light guide plate. The light source module includes tricolor lasers, two spectroscopes and a MEMS mirror. The tricolor lasers are arranged opposite to the light guide plate. The two spectroscopes are respectively arranged opposite to two of the tricolor lasers. The two spectroscopes respectively reflect light emitted from two of the tricolor lasers, and transmit the light emitted from the others. Thus, white light is achieved after the light emitted from the tricolor lasers passes through the two spectroscopes. The MEMS mirror is arranged opposite to the light incident surface for reflecting the white light and rotating to form a scanning light beam, which finally enters into the light guide plate through the light incident surface.

Abstract: A method for manufacturing the hemispherical light emitting portion of an artificial smouldering scent-stick comprises the steps of providing a light guide pipe and a light emitting element. The light guide pipe includes a bottom portion and a top portion opposite to the bottom portion. The light emitting element is fixed on the bottom portion. A colloid is dripped on an end face of the top portion and the colloid cured, to obtain the shape of the required light-emitting portion.

Abstract: A laser machining device with a proximity-warning function in relation to a workpiece being machined includes a laser element and a position feedback unit. The laser element includes a laser head for emitting a focused laser beam and a movable member for moving the laser head. The position feedback unit is positioned on the movable member and connected to an alerting circuit. When an elastic contacting member in the position feedback unit is compressed because the distance between the laser head and the workpiece is less than a minimum permitted distance the alerting circuit issues an alert.

Abstract: A light guide plate includes a light incident surface for incident light, a light emitting surface for emitting the light, and microstructures formed on the light emitting surface to collimate the light.

Abstract: A backlight module includes a light guide plate, a number of point light sources, and a prism sheet. The light guide plate includes a light incident surface and a light emitting surface perpendicularly connected with the light incident surface. The point light sources are positioned in front of the light incident surface. The light guide plate includes first microstructures, such as a matrix of grooves. on the light emitting surface. The prism sheet is positioned in front of the light emitting surface and includes a first surface arranged substantially parallel with the light emitting surface and a second surface opposite to the first surface. The prism sheet includes second microstructures, such as triangular prisms parallel with an intersection line of the light incident surface and the light emitting surface, on the first surface.

Abstract: An electronic incense assembly includes a light guide member, a light combining member, a substantially hemispherical member, a first light source and a second light source. The light guide member includes a light incident end and a light output end. The light combining member is located at the light incident end. The substantially hemispherical member is located at the light output end. The first and the second light sources emit light with different color chosen from red, green and blue. The light combining member synthesizes light emitted from the first and the second light sources to form a synthesized light. The synthesized light enters the light guide member from the light incident end, reaches the substantially hemispherical member directly and then emits out of the substantially hemispherical member to simulate a burning incense stick.

Abstract: An electrical writing board includes a bottom color plate, an electrochromic board, a touch panel, and a driving circuit module. The electrochromic board is covered on the bottom color plate, and includes a plurality of electrochromic units. The touch panel is covered on the electrochromic board, and outputs a touch signal when the touch panel is touched. The driving circuit module is electrically connected between the electrochromic board and the touch panel, and enables a part of the electrochromic units according to the touch signal to display a handwriting. The handwriting displaying on the electrochromic board is the same as a touch route sensed by the touch panel.

Abstract: A light guide plate includes a rough light emitting surface, a bottom surface opposite to the light emitting surface, and a plurality of microstructures formed on the bottom surface. A cross-sectional surface of each of the microstructures is trapezoidal shaped.

Abstract: An exemplary backlight module includes a light guide film and a light bar. The light guide film includes a top surface, a bottom surface, and a light incident surface connected between the top surface and the bottom surface. The light bar includes a light-emitting surface. The light-emitting surface is attached to the light incident surface. A method for manufacturing the backlight module is also provided.

Abstract: A clamping device is capable of clamping different types of workpieces. The clamping device includes a bracket, two rails, and two pairs of holding assemblies. The bracket includes a number of supporting poles. The two rails are movably supported on opposite two of the supporting poles. Each pair of holding assemblies are movably assembled to a rail. Each holding assembly holds a corner of a workpiece.

Abstract: An electronic incense includes a hollow tube, a laser light source arranged at a light incident end of the hollow tube, and a light outputting portion arranged at a light output end of the hollow tube. The light emitting portion contacts and covers the light output end of the hollow tube for diverging light from the laser light source. The light generated by the laser light source moves directly through a void in the hollow tube to reach the light outputting portion without a guidance of a light guiding medium, for example, an optical fiber in the hollow tube. An electronic incense including a plurality of electronic incenses which share light from a single laser light source is also provided.

Abstract: An LED unit includes an LED, a light mixing element mounted on the LED and a lens covering the light mixing element. The light mixing element is transparent and includes a top face, a bottom face and a circumferential face. Light emitted from the LED with a large output angle is refracted by the bottom face, reflected by the circumferential face and refracted by the top face of the light mixing element to radiate out of the light mixing element with a small light emergent angle.

Abstract: An optical lens includes a light incident surface, a light emitting surface, and a side surface between the light incident surface and the light emitting surface. The light emitting surface is a convex and curved surface opposite to the light incident surface. The light incident surface defines a receiving chamber. The receiving chamber is cone-shaped and concave in a direction from the light incident surface toward the light emitting surface. The side surface has a rugged structure and is a frosted surface to diffuse light therethrough. A lighting device having the optical lens is also provided.

Abstract: A light emitting diode display panel includes a control circuit and a plurality of pixels arranged in a matrix. Each of the pixels includes a first light source and a first light sensing element. The first light sensing element receives a first optical signal from a lighting pen and generates a first control signal to the control circuit. According to the first control signal, the control circuit turns on the first light source in the pixel. The pixels further comprise a first polarizer covering the first light sensing element. When the lighting pen emits the first optical signal, a polarization direction of the light from the lighting pen is parallel to a polarization direction of the first polarizer. Therefore, the first optical signal can pass through the first polarizer and be received by the first light sensing element.

Abstract: A device for manufacturing a phosphor film, includes a container for receiving and mixing a raw material of the phosphor film which includes phosphor powders and glue; a conveyor belt for transporting the mixed raw material from the container, the conveyor belt comprising two horizontal portions and an arc portion arranged between the two horizontal portions, the arc portion defining a recess downwardly; and a roller located above the arc portion of the conveyor belt and partly received in the recess, a distance being kept between the arc portion and the roller, the raw material being pressed by the roller during transportation by the conveyor belt to form the phosphor film. A curing device radiates ultraviolet to the mixed material on the arc portion of the conveyor belt to cure the glue thereof.