摘要:
A method of reducing power consumption in a liquid crystal display illuminated by a backlight device includes dimming the backlight and adjusting the intensity of the image to compensate for the dimmed backlight. A dimming factor for the backlight is based on a clipping point determining from the pixel intensity distribution of the image signal. The intensity of the image is adjusted based on the dimming factor, wherein a first tone mapping function is used to adjust pixel intensities below an intensity threshold and a second tone mapping function is used to adjust pixel intensities above the intensity threshold.
摘要:
Embodiments of methods, systems, or apparatuses relating to adjusting a brightness level associated with at least a portion of a backlight of a display device.
摘要:
Embodiments of methods, systems, or apparatuses relating to adjusting a brightness level associated with at least a portion of a backlight of a display device.
摘要:
A method of converting an image signal from an original dynamic range to a target dynamic range includes dividing the original dynamic range and the target dynamic range in to a plurality of corresponding sub-ranges and mapping each original sub-range to its corresponding target sub-range. One of the dynamic ranges is divided into a plurality of sub-ranges having equal size and the other dynamic range is divided into the corresponding sub-ranges each having a size based on a characteristic of the corresponding equal size sub-ranges. The invention may be employed in display, capture and image processing apparatus.
摘要:
A three-dimensional infrared laser aircraft landing-guiding system with high directivity is described. The system utilizes a highly penetrable and highly directional infrared laser source to generate an optical image via an optical image generating apparatus. The generated optical image involves the information for aircraft landing, and the information covers a large range of flying areas to make the optical image detectable for an aircraft. With the information provided by the optical image, the aircraft can be guided to the best landing path. The infrared laser source is highly directional and can emit a laser light to specific directions, reducing waste of energy, increasing navigation distances, and improving anti-jamming capability.
摘要:
An isolated flyback converter having temperature compensation (TC) uses primary side sensing and an output diode, the output diode having a variable voltage drop related to its temperature. A feedback voltage VFB, proportional to the output voltage VOUT, in a feedback loop is compared to a fixed reference voltage VREF for setting a duty cycle of a power switch, wherein VFB is caused to approximately equal VREF. A TC circuit has a voltage source configured to generate a proportional-to-absolute-temperature voltage VPTAT, wherein VPTAT is at approximately VREF at a calibration temperature T0 and rises as a temperature exceeds T0. The voltage source is connected to the VFB node via a TC resistor RTC, so that at T0 no current flows through RTC. Therefore, the selection of the optimal RTC does not affect the selection of a scaling resistance for generating VFB. The current through RTC at elevated temperatures compensates VOUT.
摘要:
A disk drive comprises a track follow control system having a plurality of selectable frequency modes, the track follow control system configured to receive a position error signal and to output a control signal based on the position error signal, wherein the control signal is used by a head assembly to position a head over a disk. The disk drive also comprises a state estimator configured to receive the control signal and a position signal indicating a position of the head, to estimate a disturbance based on the control signal and the position signal, and to output an estimated disturbance signal based on the estimated disturbance. The disk drive further comprises a disturbance evaluator configured to receive the estimated disturbance signal, and to select one of the frequency modes of the track follow control system based on the estimated disturbance signal.
摘要:
An LED (light emitting diode) lighting device with high color rendering index includes a plurality of LED luminous units, wherein one of the LED luminous units has (u′, v′) chromaticity coordinates defined on a 1976CIE chromaticity diagram, a distance between every two coordinate points is not less than 0.01, a distance between at least one of the coordinate points and any other coordinate point is not less than 0.1, and coordinates of at least one of the coordinate points meet a condition that 0.10≦u′≦0.45 and 0.30≦v′≦0.50. By selecting a variety of LEDs within a certain spectral range to mix light, the color rendering index of the LED lighting device with high color rendering index of the present invention can be improved, and simultaneously the cost of the light source can be controlled.
摘要:
A semiconductor structure is provided. The semiconductor structure includes a substrate, a dielectric layer, a pad structure and a protection structure. The dielectric layer is disposed on the substrate. The pad structure is disposed in the dielectric layer. The pad structure includes a plurality of first metal layers and a plurality of plugs which are electrically connected to each other vertically. There is no contact plug disposed between the pad structure and the substrate. The protection structure is disposed in the dielectric layer and encompasses the pad structure.