Abstract: A compact optical imaging device with shortened focal length, for use in an imaging module and an electronic device, comprises first to fifth lenses. An image-side surface of the first lens is concave near an optical axis. An image-side surface of the third lens is concave near the optical axis. The second and fourth lenses have a negative refractive power. The third and fifth lenses have a positive refractive power. The optical imaging device satisfies formulas: 95°/mm<FOV/TL5<105°/mm and 1 mm?1<FNO/TL4<1.5 mm?1, FOV being a maximum field of view of the optical imaging device, TL5 being a distance from an object-side surface of the fifth lens to an image plane of the optical imaging device along the optical axis, FNO being a F-number of the optical imaging device, and TL4 being a distance from an object-side surface of the fourth lens to the image plane along the optical axis.

Abstract: A compact optical imaging device with short optical length and low sensitivity, for use in an imaging module and an electronic device, comprises first to fifth lenses and a filter. An image-side surface of the fourth lens is convex near an optical axis of the optical imaging device. An image-side surface of the fifth lens is concave near the optical axis. The optical imaging device satisfies formulas 0.03 mm/°<TL5/FOV<0.1 mm/° and 2.4 mm<TL4/FNO<2.9 mm, TL5 being a distance from an object-side surface of the fifth lens to an image plane of the optical imaging device along the optical axis, FOV being a maximum field of view, TL4 being a distance from an object-side surface of the fourth lens to the image plane along the optical axis, and FNO being a F-number of the optical imaging device.

Abstract: An optical imaging lens proofed against field curvatures, in an imaging module, and the module being used in an electronic device, is, from an object side to an image side, composed of a first lens with a positive refractive power, a second lens, a third lens, a fourth lens with a negative refractive power, a fifth lens, and a sixth lens with a negative refractive power. The optical imaging lens satisfies the formula ?3 mm?1<FNO/f6<?0.1 mm?1, ?0.065 mm/°<f6/FOV<?0.03 mm/°, wherein FNO is a F-number of the optical imaging lens, f6 is a focal length of the sixth lens, and FOV is a maximum field of view of the optical imaging lens.

Abstract: A compact multi-lens optical imaging device having high resolution in both near-sight and far-sight, for use in an electronic device, is composed of first to fourth lenses having positive and negative refractive powers and a filter. The optical imaging module satisfies formula 0.4<Imgh/f<1.4, 0.7<TL/f<2, Imgh being a half of an image height corresponding to a maximum field of view of the optical imaging device, f being an effective focal length of the optical imaging device, and TL being a distance from an object-side surface of the first lens to an image plane of the optical imaging device along the optical axis.

Abstract: A compact optical imaging device with three individual lenses, able to capture clear images of both near and distant objects with a balance between imaging quality and sensitivity, and used in an imaging module and an electronic device, satisfies the formula 0 mm<R11<1 mm, ?5%<DIS<5%, V1?V2, V3?V2, where R11 is a radius of curvature of an object-side surface of the first lens, DIS is optical distortion of the optical imaging device, V1 is a dispersion coefficient of the first lens, V2 is a dispersion coefficient of the second lens, and V3 is a dispersion coefficient of the third lens.

Abstract: An optical imaging lens, an imaging module, and an electronic device are provided. The optical imaging lens, from an object side to an image side, is composed of a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The optical imaging lens satisfies following formula: 24<(V5?V4)/(TL5?TL4)<42, 48<FOV/FNO<52. Wherein V4 is a dispersion coefficient of the fourth lens, V5 is a dispersion coefficient of the fifth lens, TL4 is a distance from an object surface of the fourth lens to an image plane of the optical imaging lens along an optical axis, TL5 is a distance from an object surface of the fifth lens to the image plane along the optical axis, FOV is a field of view of the optical imaging lens, and FNO is F-number of the optical imaging lens.

Abstract: An optical imaging lens is composed of a first lens, a second lens having a positive refractive power, a third lens having a negative refractive power, a fourth lens, a fifth lens having a positive refractive power, and a sixth lens having a negative refractive power. At least one of the object surface of the fifth lens, the image surface of the fifth lens, the object surface of the sixth lens, and the image surface of the sixth lens is aspheric, having at least one critical point near the optical axis. The optical imaging lens meets formula 50<V6<60, 2<TTL/EPD<3, V6 being the dispersion coefficient of the sixth lens, TTL being the distance from the side of the first lens to the image surface of the optical imaging lens on the optical axis, and EPD being the entrance pupil diameter of the optical imaging lens.

Abstract: A lens assembly has an optical axis. The lens assembly includes a first lens and a second lens stacked on a side of the first lens along the optical axis. A mounting groove is recessed from a surface of the first lens facing the second lens, the mounting groove is arranged around the optical axis and coaxially with the first lens. A protruding portion is protruded from a surface of the second lens facing the first lens to match the mounting groove, the protruding portion is arranged around the optical axis and coaxially with the second lens. The protruding portion is received in the mounting groove. The disclosure also provides an electronic device having the lens assembly.

Abstract: An optical lens includes an aperture, a first lens including a first surface and a second surface, a second lens including a third surface and a fourth surface, a third lens including a fifth surface and a sixth surface, a fourth lens including a seventh surface and a eighth surface, a fifth lens including a ninth surface and a tenth surface, and an image plane, arranged in that sequence, and satisfies the following conditions: ?5.0?(R3+R4)/(R3?R4)??0.75; ?5.0?(R5+R6)/(R5?R6)??0.8; ?5.3?R7/R8?7; and 2?(T2+T3)/T4?4. R3, R4, R5, R6, R7, and R8 denote radius of curvatures of the third surface, the fourth surface, the fifth surface, the sixth surface, the seventh surface, and the eighth surface, respectively. T2, T3 and T4 denote distances from the image plane to the fourth surface, the sixth surface, and the eighth surface along the optical axis, respectively.

Abstract: A light guide plate includes a light incident section and a light guiding section. The light incident section includes a light incident surface configured to receive light beams emitted from a light source, a top surface adjacent to the light incident surface, a first bottom surface oppose to the top surface. The light guiding section includes a main light emitting surface, a connecting surface connecting the main light emitting surface with the top surface, a second bottom surface opposite to the main light emitting surface and connecting with the first bottom surface, and a contacting surface connecting with the main light emitting surface and the second bottom surface. A step is formed at a junction of the light incident section and the light guiding section, and the connecting surface and the top surface define an accommodating space.

Abstract: A light source module includes a circuit board, a light source electrically coupled to the circuit board including a first light emerging face, a light guide plate close to the light source and including an light incident face, a reflective piece located on one side of the light guide plate, a diffusion plate located on another side of the light guide plate, a frame used to fix the circuit board, the light guide plate, the reflective piece and the diffusion plate. The light incident face and the light emerging face cooperatively forming an angle. Light from the light source is guided by the light guide plate and reflected by the reflective piece and diffused by the diffusion plate.

Abstract: A light source module includes a circuit board, a light source electrically coupled to the circuit board including a first light emerging face, a light guide plate close to the light source and including an light incident face, a reflective piece located on one side of the light guide plate, a diffusion plate located on another side of the light guide plate, a frame used to fix the circuit board, the light guide plate, the reflective piece and the diffusion plate. The light incident face and the light emerging face cooperatively forming an angle. Light from the light source is guided by the light guide plate and reflected by the reflective piece and diffused by the diffusion plate.

Abstract: An LED encapsulation structure includes a reflective cup, a positive electrode plate, and a negative electrode plate. The reflective cup has a light emitting surface, a bottom surface opposite to the light emitting surface, two parallel first sides, and two parallel second sides. The positive electrode plate includes a first weld, a second weld, and a bent portion interconnecting with the first weld and the second weld. The negative electrode plate includes a third weld, a fourth weld, and a second bent portion interconnecting with the third weld and the fourth weld. The first weld and the third weld are positioned on one first side, and spaced from each other. The second weld and the fourth weld are positioned on the bottom surface.

Abstract: A light guide plate includes a light incident section and a light guiding section. The light incident section includes a light incident surface configured to receive light beams emitted from a light source, a top surface adjacent to the light incident surface, a first bottom surface oppose to the top surface. The light guiding section includes a main light emitting surface, a connecting surface connecting the main light emitting surface with the top surface, a second bottom surface opposite to the main light emitting surface and connecting with the first bottom surface, and a contacting surface connecting with the main light emitting surface and the second bottom surface. A step is formed at a junction of the light incident section and the light guiding section, and the connecting surface and the top surface define an accommodating space.

Abstract: An electronic device paired with an infrared remote control, includes a display screen having a display area, at least one infrared emitter, at least one infrared receiver, a prism and a processing unit. A prism is adjacent to the at least one infrared receiver for converging the infrared rays from the at least one infrared emitter and the infrared remote control to the at least one IR receiver. A processing unit is for activating and then deactivating the infrared emitters one after another, identifying operations of a user on the display area by analyzing the interception of the infrared rays emitted from each of the infrared emitters, identifying operations of a user according to the infrared signals from the infrared remote control and executing corresponding functions associated with the operations of the user.

Abstract: A color temperature adjusting system includes a processing unit, a constant-current drive unit, and an light emitting unit (LED) unit including two unmatched LED modules with different basic color temperatures. A table records a relationship between coefficient values and current values for the current(s) flowing through the two LED modules. The processing unit selects one of a number of predetermined formulas to calculate the coefficient value by comparing a desired value with a threshold value, and further determines the current values according to the calculated coefficient value listed in a table. The constant-current drive unit includes two drive module generating modulating signals to adjust the respective values of the current flowing through the two LED modules to match the determined current values, thereby adjusting the color temperature value of the LED unit to the desired level. A related method is also provided.