49results about How to "Maintain brightness" patented technology

A pixel structure includes a light-emitting diode, a transistor, a data-receiving unit, a compensating unit, and a resetting unit. The transistor is configured to be electrically coupled to the light-emitting diode, and drive the light-emitting diode based on a voltage difference between the control terminal and the first terminal of the transistor. The data-receiving unit is configured to be electrically coupled to the first terminal of the transistor, and provide a pixel date signal to the first terminal of the transistor based on a first scan signal. The compensating unit is electrically coupled to the control terminal and the second terminal of the transistor to act as a current path therebetween. The resetting unit is electrically coupled to the light-emitting diode. The resetting unit is configured to respectively provide a reverse bias and reference voltage to the light-emitting diode and the control terminal of the transistor.

A light source and an illumination device are provided for making it possible to adjust influence of light over a living body while keeping good brightness and color taste of illumination light. A conversion characteristic in the degree of effect indicative of a relationship in a light wavelength between a living body reaction characteristic and an isochromatic characteristic of the visual perception is derived out and the light emitting intensity of a plurality of light emitters with different wavelength characteristics is controlled in accordance with the conversion characteristic, so as to adjust influence of light over a living body while keeping brightness and color taste of illumination light.

A stereoscopic display for switching between two-dimensional (2D) and three-dimensional (3D) images. The stereoscopic display includes a display device providing an image and a parallax barrier unit that transmits all incident light in a 2D mode and forms barriers to separate an image for a left eye from an image for a right eye in a 3D mode by moving two facing polarization grating screens relative to each other. The polarization grating screens have a grating pattern such that two kinds of birefringence elements changing the directions of polarization of incident light into different directions are alternately disposed horizontally and vertically, and each row of the birefringence elements is shifted with respect to a previous row by a predetermined horizontal distance.

A technique according to the present invention allows a projection-type image display system to suppress the temperature rise of the polarization split devices and secure high image quality. Polarization split means has a polarization split device arranged in a medium with a refractive index larger than 1. The polarization split device has a polarization split surface on which a diffractive grating structure is formed to polarize and split light. An air layer is formed in contact with the polarization split surface. In a projection type image display apparatus or an optical unit using this apparatus, light fluxes are polarized and split by the polarization split means before irradiated to light valves and after modulated by the light valves and color composition is made from the polarized and split light fluxes before enlarged and projected by a projection lens unit.

An image display device has three reflective image display elements for red, green and blue to form an optical image according to a video signal from light output from a light source, and an optical system to supply light onto the display elements and to combine and output the light reflected from the display elements. The image display device includes a first polarity converting unit to convert luminous flux from the light source to S polarized light, a first polarized beam splitter, and second polarized beam splitter. The reflective image display element for green is provided in a vicinity of the first polarized beam splitter, and the light reflected by the first polarized beam splitter and input to the reflective image display element for green is S polarized light. The light output from the reflective image display element for green permeates the first and second polarized beam splitters.

The present invention relates to a display comprising, in order, a support, a first patterned conductor, a first level of electrically modulated imaging material, a coextensive common electrode conductor, a second level of electrically modulated imaging material, and a second patterned conductor and a method of imaging the display.

The present invention relates to a microlens array sheet with enhanced optical performance, and a backlight unit having same, and more specifically, to a microlens array sheet and a backlight unit having same, the microlens array sheet comprising: a base portion; and a plurality of microlenses formed on one surface of the base portion, wherein the plurality of microlenses have an irregular array, and the standard deviation of the distance between the mid points of two microlenses adjacent to each other is, 2-20% of the average pitch(p) between microlenses adjacent from the mid point of a selected microlens after selecting one of the microlenses.

The invention provides a rearview mirror controlling method and a rearview mirror controlling system. A rearview mirror comprises an electrochromic component and a displaying unit. The rearview mirror controlling method comprises the following steps of determining whether a first glare value of the rearview mirror exceeds a preset glare threshold value or not; determining a first temperature value of the electrochromic component when the first glare value of the rearview mirror exceeds the preset glare threshold value; determining a first voltage value of the electrochronic component according to the first temperature value and the first glare value; determining a penetrating rate changing curve of the electrochromic component according to the first voltage value and the first temperature value; and adjusting the backlight brightness of the displaying unit over time to compensate the displaying brightness of the displaying unit according to the penetrating rate changing curve.

In a display system, an inputted video sequence is displayed with an initial brightness at a first time and corresponding to a present control signal level and further displayed with a decayed brightness at a second time before adjustment. An apparatus, used for adjusting the brightness of the inputted video sequence, includes an input unit, a counter, a controller, and a brightness control unit. The input unit is used for inputting the present control signal level. The counter is used for counting time and outputting a notification signal at the second time. The controller is used for receiving the present control signal level and the notification signal and accordingly generating a present compensating parameter. The brightness control unit is used for receiving the present compensating parameter and generating an adjusted control signal level to adjust the brightness of the inputted video sequence from the decayed brightness to the initial brightness.

The invention relates to the technical field of bonding wire production, and particularly discloses a bonding wire cathode passivation protecting treatment technology. The bonding wire cathode passivation protecting treatment technology comprises the following steps that raw wire drawing is performed on a bonding wire raw material core, annealing is performed on the bonding wire raw wire obtainedafter drawing, passivation is performed on the bonding wire raw wire obtained after annealing through a trivalent chromium cathode passivation solution, the bonding wire raw wire obtained after passivation of the trivalent chromium cathode passivation solution is washed with deionized water inside a cleaning box, the cleaned bonding wire raw wire is dried inside a drying box, and the dried bondingwire raw wire is rewound and packaged through a take-up wheel; the bonding wire cathode passivation protecting treatment technology can provide a flat passivation layer, under control of additional current, a layer of stable and smooth nanoscale solid phase membrane is formed and covers the surface of a metal substrate through electrochemical transition.

A LED submarine lighting device includes a light-transmissive lamp tube, a LED substrate mounted inside the light-transmissive lamp and carrying a plurality of LED devices in the top surface thereof for giving off light, a heat conducting bar mounted in the light-transmissive lamp tube and stopped between the bottom surface of the LED substrate and the inside wall of the light-transmissive lamp tube for quick dissipation of waste heat from the LED devices to avoid the serious problem in brightness attenuation, and two end caps respectively fastened to opposing front and rear ends of the light-transmissive lamp tube in a water-tight manner.

An illumination system including a first laser light source, a second laser light source, and a wavelength conversion module is provided. The first laser light source provides a first laser light beam in a first time interval and a third time interval. The wavelength conversion module is located on a transmission path of the first laser light beam. The wavelength conversion module includes at least one wavelength conversion region, at least one non-conversion region, a first standby region, and a second standby region, and is configured to rotate along a rotating shaft, so that the wavelength conversion region, the first standby region, the non-conversion region, and the second standby region are sequentially rotated in one direction, and the wavelength conversion region and the non-conversion region are alternately cut into the transmission path of the first laser light beam. An illumination control method and a projection apparatus are also provided.

A backlight module and liquid crystal display device are disclosed. The backlight module includes: at least one first light-emitting unit having a first blue light-emitting chip; at least one second light-emitting unit having a second blue light-emitting chip, wherein, an emission peak wavelength of the second blue light-emitting chip is greater than an emission peak wavelength of the first blue light-emitting chip; and a control circuit used for dynamic adjusting a brightness of the first light-emitting unit and the second light-emitting unit according to the blue saturation. The present invention can dynamically adjust the output amount of the blue light according to the blue saturation so that the present invention can selectively decrease the blue light when maintaining the display brightness and chroma.

A projector and a brightness adjusting method are provided. The projector includes a distance sensor configured to detect a distance between the projector and a projection plane, a light source configured to provide an illumination beam, a brightness controlling circuit configured to control the light source, and a processor coupled to the distance sensor, the light source, and the brightness controlling circuit. The processor calculates according to the distance to obtain an image size of a projected image on the projection plane. The processor obtains a current value corresponding to the image size according to a color table. The processor instructs the light source to adjust a luminous flux of the illumination beam according to the current value for generating a target brightness value of the projected image. When a brightness of the projected image is excessively large, a brightness of an image beam of the projector is automatically reduced.

The purpose of the present invention is to provide: an LED display device for correcting the luminance of each LED element while reducing the amount of calculation and amount of data stored required for calculating the lighting time of each LED element; and a method for correcting the luminance of the LED display device. This LED display device 100 comprises: a first display unit 10 including a plurality of LED elements; a second display unit 20 including measurement LED elements identical to the LED elements of the first display unit 10; a luminance measurement unit 9 for measuring the luminance of the measurement LED elements; a luminance degradation rate storage unit 11 for storing a degradation rate in the luminance of the measurement LED elements; an accumulated lighting time estimation unit 6 for estimating an accumulated lighting time at each predetermined time interval; an average duty ratio storage unit 7 for storing an average duty ratio calculated by dividing the accumulatedlighting time estimated by an accumulated operation time; and a luminance correction coefficient calculation unit 12 for calculating a luminance degradation rate by referring to the luminance degradation rate storage unit 11 and the average duty ratio storage unit 7, and calculating a luminance correction coefficient from the luminance degradation rate.