73results about How to "Reduce lighting brightness" patented technology

An image display device according to the present invention is capable of presenting to a viewer a high-quality lustrous video on a display screen with best screen brightness by increasing visual contrast and avoiding loss of true black elements without widening a dynamic range of a picture signal. The image display device is provided with a liquid crystal display portion (11), a display control portion (14), a backlight (12), a backlight control portion (13) and an average brightness detecting portion (15) and detects brightness of the light source in accordance with the average brightness of a picture signal to be displayed. It is further provided with a peak detecting portion (16) and corrects the control of the backlight control portion (13) in accordance with a detected peak value of a picture.

The invention provides a control circuit of controlling the illumination brightness of a bicycle according to the bicycle speed. Through detecting the running speed of a bicycle, the illumination state of a lamp on the bicycle is controlled. The control circuit comprises a speed detection unit, a speed and brightness converting circuit, a lamp brightness adjusting circuit and a drive circuit. The speed detection unit is used for detecting the speed of the running bicycle and producing a speed signal. The speed and brightness converting circuit connects the speed detection unit and generates a conversion signal according to the speed signal. The lamp brightness adjusting circuit connects the speed and brightness converting circuit and produces a brightness adjusting signal according to the conversion signal. The drive circuit connects the speed and brightness converting circuit and adjusts the brightness of the lamp according to the brightness adjusting signal.

A frame assembly is worn by a wearer to maintain at least one substantially transparent eye panel in a generally shielding position in front of the wearer's eyes. A processor receives an incoming audio signal and wirelessly transmits the incoming audio signal to at least one earpiece which audibly communicates the incoming audio signal to the wearer. An outbound microphone assembly picks up an outbound audio signal from the wearer and transmits the outbound audio signal to the processor which further transmits the outbound signal to a remote recipient. An ambient microphone assembly picks up an ambient audio signal and transmits the ambient audio signal to the processor. The processor is structured to enhance the incoming audio signal and/or the outbound audio signal based on the ambient audio signal. The processor is also structured to transmit a voice component of the ambient audio signal to the earpiece. A camera assembly picks up an outbound visual signal and transmits the outbound video signal to the processor which further transmits the outbound video signal to a remote recipient. A display assembly displays to the wearer an incoming visual signal received by the processor.

The invention relates to an optical fiber combiner and a method for the manufacture thereof. The combiner has a tapering support preform with a plurality of capillary bores, a plurality of input fibers including a core and a cladding around the core and being arranged in parallel in the capillary bores of a support preform, and an output fiber coupled to the tapered end of the support preform in optical connection with the input fibers. The cladding thickness to core thickness ratio of at least one of the input fibers is decreased at the region of the support preform. The invention provides an optically high quality fiber combiner.

A portable electronic device with a simulation touch screen includes a main body, a display screen, a stylus, a camera unit and a processing unit. The display screen is mounted on the main body. The stylus is used for controlling movement of a cursor on the display screen. The stylus has a light source for generating a light spot on the display screen. The stylus is configured for controlling movement of a cursor on the display screen. The camera unit is electrically connected with the main body and faces the display screen. The camera unit is configured for capturing images of the display screen and the light spot thereon. The processing unit is mounted in the main body and electronically coupled to the camera unit.

A surface light source device includes a number of light sources, a first prism sheet and a second prism sheet. The light sources are distributed on a bottom plate of a housing. The first prism sheet and the second prism sheet are arranged above the light sources in that order. The light sources and the first prism sheets are spaced by a first predefined distance, and the first prism sheets and the second prism sheets are spaced by a second predefined distance. The light emitting surface of the first prism sheet includes a number of first diffusion structures, and the light emitting surface of the second prism sheet includes a number of second diffusion structures. Light beams emitted by the light sources are substantially diffused after passing through the first prism sheet and the second prism sheet and become surface light beams.

An image display device includes a display unit that is installed inside a finder window provided in a housing and displays images, an illumination unit that illuminates a space inside the finder window, an obtaining unit that obtains brightness of an outside of the housing, and a control unit that when the brightness obtained by the obtaining unit is a first brightness, sets the brightness of the illumination unit to a second brightness, and when the brightness obtained by the obtaining unit is a third brightness brighter than the first brightness, sets the brightness of the illumination unit to a fourth brightness brighter than the second brightness.

With a solar ball 10 serving as a light-receiving semiconductor apparatus, the outer surface of a spherical solar cell 1 is covered with a light-transmitting outer shell member 11, and electrode members 14, 15 are connected to electrodes 6, 7 of the solar cell 1. The outer shell member 11 comprises a capsule 12 produced by bonding together two halves, and a filler 13 that is packed inside this capsule and cured. A solar panel can be configured such that a plurality of the solar balls 10 are arrayed in a matrix and connected in parallel and in series, or a solar panel can be configured such that a multiplicity of spherical solar cells 1 are arrayed in a matrix and covered with a transparent outer shell member. A solar string in the form of a rod or cord can be configured such that a plurality of the solar cells 1 are arrayed in columns and connected in parallel, and then covered with a transparent outer shell member. Since the outer shell member 11 condenses light, the light-receiving area of the solar cell 1 can be expanded. Also discussed is a light-emitting semiconductor apparatus in which a spherical semiconductor device with a light-emitting function, rather than the solar cell 1, is covered with an outer shell member.

A battery powered LED lamp including an array of high-performance LEDs disposed in a lightweight directionally oriented shade. Converting electronics are provided which may include a step-down DC voltage switching regulator for converting a higher voltage of the battery power source to a lower voltage required to drive the LEDs at greater than 90% efficiency. The converting electronics may also include an LED current monitoring circuit for preventing thermal runaway of the LEDs and for reliably operating the LEDs near their maximum rating so to provide the maximum amount of brightness from the LED array and maximum battery life.

A smart lighting device for vehicle is disclosed and comprises a light body, a light collection unit, a lightening unit, and light focusing glass. An output current of the pulse-width modulation unit is zero while the light collection unit is collecting the ambient light brightness, even the lightening unit is not lightened, so that there is not any light brightness in the light body and then the ambient light brightness of the light projection area is accurately detected while the light collection unit is collecting the ambient light brightness of the light projection area.

A surface light source device includes a number of light sources, a first prism sheet and a second prism sheet. The light sources are distributed on a bottom plate of a housing. The first prism sheet and the second prism sheet are arranged above the light sources in that order. The light sources and the first prism sheets are spaced by a first predefined distance, and the first prism sheets and the second prism sheets are spaced by a second predefined distance. The light emitting surface of the first prism sheet includes a number of substantially parallel elongated protrusions, and the light emitting surface of the second prism sheet includes a number of elongated V-shaped ridge structures extending along different directions. Light beams emitted by the light sources are substantially diffused after passing through the first and the second prism sheet and become surface light beams.

The invention provides a shading plate assembly, a control method and a control device thereof and a vehicle, which relate to the technical field of shading, and can avoid the problems of darkening ofan exterior scene and worsening of a visual field while solving the problem of visual dizziness of human eyes caused by direct sunlight in the driving process of the vehicle. An image acquisition module in the shading plate assembly is used for acquiring image information of a transparent panel and human eyes; a control module is used for determining target position information of fixation pointsof human eyes positioned on the transparent panel according to the image information, and determining a target control area, corresponding to the target position information, on the transparent panel; a detection module is used for detecting corresponding optical information when light penetrates through the target control area and is emitted to human eyes; and the control module is also used foradjusting the light transmission degree of the transparent panel in the target control area according to the optical information, so that the optical information is within a preset range. The shadingplate assembly provided by the invention is used for shading.

The invention provides a light incoming surface and a light emitting surface, which are located on the two sides away from each other of the lens and are symmetric with respect to the central axis of the lens. The light incoming surface and the light emitting surface are located in the same coordinate system. The light incoming surface meets a formula 1 (shown in the description), wherein C1 is the curvature of the light incoming surface, r1 is the distance between the center of the lens and the intersecting point between the light incoming surface and the radius perpendicular to the central axis of the lens, u1 is the normalized radius of the light incoming surface, am is the non-spherical coefficient, and Qm is an m polynomial representing that the sum of the am in the formula 1 is equal to the sum of the mean square root of the slope of the light incoming surface. The light emitting surface meets a formula 2 (shown in the description), wherein C2 is the curvature of the light emitting surface, r2 is the distance between the center of the lens and the intersecting point between the light emitting surface and the radius perpendicular to the central axis of the lens, u2 is the normalized radius of the light emitting surface, am is the non-spherical coefficient, Qm is an m polynomial representing that the sum of the am in the formula 2 is equal to the sum of the mean square root of the slope of the light emitting surface.

The present invention includes a plurality of linear sources 17 arranged parallel to one another, and a light reflecting member 40 arranged on the side of the linear light sources 17 that corresponds to the opposite side of the light emitting side. The linear light sources 17 are arranged so that a narrow-interval area 17A where the arrangement interval thereof is relatively narrow and a wide-interval area 17B where the arrangement interval is relatively wide are provided. The light reflecting member 40 includes an opening section 50 located directly below the linear light sources 17. The opening section 50 is provided so that the opening ratio as a ratio between a total area of the light reflecting member 40 and areas of the opening section 50 is higher at an area of the light reflecting member 40 corresponding to the narrow-interval area 17A than at an area of the light reflecting member 40 corresponding to the wide-interval area 17B.

A projector includes: a projector body, which has a light modulating device that modulates light emitted from a light source according to input image information to thereby form an optical image and a projection optical device that projects the formed optical image in an enlarged manner; an image output device that outputs the image information to the projector body; a connection mechanism for connecting the projector body and the image output device with each other such that the projector body and the image output device can rotate relative to each other; a rotation operation detecting unit that detects a relative rotation operation of the projector body and the image output device; and a control unit that controls the projector body and the rotation operation detecting unit. The control unit includes: a rotation operation recognition portion that recognizes whether or not the projector body and the image output device are in a relative rotation operation state on the basis of a detection result of the rotation operation detecting unit; and a brightness adjusting portion that adjusts the brightness of light emitted from the projection optical device when the rotation operation recognition portion has recognized that the projector body and the image output device are in the relative rotation operation state.

An optically controlled lighting device and a control method thereof are provided. The optically controlled lighting device includes a lighting main body, a dimming time controller and an optical detector. The control method includes the following steps. In a step (a), the lighting main body, including a controlling circuit and a light source, the dimming time controller and the optical detector are provided. In a step (b), the dimming time controller is enabled to respectively generate an on/off dimming signal, and the light source is respectively turned on/turned off during an on/off period respectively corresponding to the on/off dimming signal, wherein the off period is shorter than the time period for producing persistence of vision. In a step (c), an ambient light intensity is detected by the optical detector during the off period, the brightness of the light source is increased or decreased or the light source is turned off.

The invention discloses a 3D (three dimensional) display device and a phase delay piece of the 3D display device. The phase delay piece is arranged on an external surface of a polaroid and comprises multiple first phase delay unit lines, multiple second phase delay unit lines and non-phase delay unit lines, wherein the second-phase delay unit lines and the first phase delay unit lines are arranged in a staggering manner, each non-phase delay unit line is arranged between the adjacent first phase delay unit lines and second phase delay unit line; an optical axis of the non-phase delay unit lines are vertical or parallel to a penetrating shaft of the polaroid; and according to the non-phase delay unit lines, the brightness of juncture of a phase delay region can be weakened, and further improve image interference caused by the attaching and the shifting of the phase delay piece can be improved.

A surface light source device includes a lamp post, a number of light sources distributed in rows on the side surfaces of the lamp post, and a number of first prism sheets and second prism sheets arranged around the lamp post in that order. Each of the first prism sheets and the second prism sheets includes a light incident surface and a light exit surface opposite to the light incident surface. Each of the light exit surfaces includes a number of substantially parallel elongated protrusions, and the longitudinal directions of the elongated protrusions of the first prism sheet and the second prism sheet are substantially perpendicular to each other. The first prism sheets and the lamp post are approximately spaced by a first predefined distance, and the second prism sheets and the first prism sheets are approximately spaced by a second predefined distance.