90results about How to "Low grayscale" patented technology

A method and system for compressing and displaying a digital ink trace. Raw ink data is smoothed, and sharp points of the smoothed line are found. Curve-fitting is then used to generate a mathematical expression that defines the line segments between adjacent sharp points. The ink trace then is represented by a backbone spline that includes the sharp points and the mathematical expressions for the line segments. Thickness information, such as pressure or acceleration information, is combined with the backbone spline to provide a compressed ink file that represents a contour curve of the original ink trace. A display module uses an algorithm to separate the contour curve into a sequence of straight lines. A set of pixels is then generated for the display of each straight line using a novel antialiasing method. The pixels at the ends of adjacent straight lines are aligned using a weighting algorithm.

An improved AM OLED pixel circuit and method of wide dynamic range dimming for AM OLED displays are disclosed that maintain color balance throughout the dimming range, and also maintain the uniformity of the luminance and chromaticity of the display at low gray-levels as the display is dimmed to lower luminance values. As such, AM OLED displays can meet the stringent color / dimming specifications required for existing and future avionics, cockpit, and hand-held military device display applications. Essentially, the OLED pixel circuit and method of dimming that are disclosed use Pulse Width Modulation (PWM) of the OLED pixel current to achieve the desired display luminance. Two example circuits are disclosed that externally PW modulate the common cathode voltage or common power supply voltage to modulate the OLED current in order to achieve the desired display luminance. Three example circuits are disclosed that incorporate additional transistor switches in the pixel circuit to modulate the OLED current during the frame time. By PWM of the OLED current, in combination with data voltage (or current) modulation, wide dynamic range dimming can be achieved while maintaining the color balance and the luminance and chromaticity uniformity required over the surface of the display involved.

A method and system for compressing and displaying a digital ink trace. Raw ink data is smoothed, and sharp points of the smoothed line are found. Curve-fitting is then used to generate a mathematical expression that defines the line segments between adjacent sharp points. The ink trace then is represented by a backbone spline that includes the sharp points and the mathematical expressions for the line segments. Thickness information, such as pressure or acceleration information, is combined with the backbone spline to provide a compressed ink file that represents a contour curve of the original ink trace. A display module uses an algorithm to separate the contour curve into a sequence of straight lines. A set of pixels is then generated for the display of each straight line using a novel antialiasing method. The pixels at the ends of adjacent straight lines are aligned using a weighting algorithm.

A liquid crystal display including a pair of substrates having electrodes and a liquid crystal layer sandwiched between the substrates. A bank-shaped projection made of an insulating material is formed on the electrode, and each of the display pixels is divided into two or more regions having different capacitances by capacitive coupling. Additionally, voltages corresponding to the capacitances are applied to the respective regions in the application of a driving voltage.

Disclosed is an LCD capable of adaptively selecting a gamma curve based on a viewing angle. The LCD includes: a viewing angle detector for detecting the viewing angle of an LCD panel to generate information about the viewing angle, and a gamma curve determiner for selecting a gamma curve corresponding to the information of the viewing angle and controlling the gray level with a gamma voltage value defined by the selected gamma curve. The viewing angle detector has a driving voltage generator and a voltage divider. The driving voltage generator outputs a gate-on / off voltage and an analog driving voltage based on an externally input power, and the voltage divider drops the level of the gate-on voltage to generate a first voltage. A viewing angle generator outputs information about the viewing angle based on the analog driving voltage and the first voltage.

A light-emitting device (LED) includes a primary driving circuit and a pixel. The primary driving circuit receives a system high voltage, a data signal, and a scan signal from a scan line, wherein the primary driving circuit has an output terminal. The pixel includes a plurality of light-emitting sub-pixel circuits. Each of the light-emitting sub-pixel is coupled to the output terminal of the primary driving circuit. Wherein, a frame period includes multiple equal fields, the light-emitting sub-pixel circuits are respectively corresponding to the fields and are activated according to a sequence as assigned. The light-emitting device display includes a plurality of light-emitting sub-pixel circuits are activated in raw, in column or both according to a sequence as assigned.

The invention provides a method and a device for improving the display effect of an LED display screen, and the method comprises the steps: expanding the original gray scale number of a display imageby N times, obtaining the original gray scale of each pixel point of the display image under the original gray scale number, converting the original gray scale into an expanded gray scale under the expanded gray scale number, and splitting the extended gray scale into a form of a first gray scale and a second gray scale; re-assigning a second gray scale in the extended gray scale of each pixel point of the display image according to a preset gray scale assignment strategy to obtain a to-be-corrected image; and performing brightness and color temperature correction on to-be-corrected image to obtain corrected display image, and displaying corrected display image in LED display screen. According to the invention, the gray scale precision of the display image can be improved, the jitter is eliminated, the adjustment of the low gray scale RGB ratio is realized, the color bar transition of the display image is uniform, and the display effect of the display screen is effectively improved.

Disclosed is a fiber-reinforced polyolefin resin composition containing (A) 1-20 mass% of carbon fibers having a fiber diameter of 3-20 mum, (B) 3-50 mass% of black lead (graphite) having an average particle diameter of 1-100 mum, and (C) 25-95 mass% of a polyolefin resin, wherein the mass ratio of the black lead (graphite) (B) (Wg) to the carbon fibers (A) (Wcf), namely mass ratio (Wg / Wcf), is 1-10.

The invention discloses a manufacturing method for high-quality cotton linter. The processing steps includes that (1) gross cottonseeds of raw material of the cotton linter are purified, stone and dust in the gross cottonseeds are eliminated, and the purified gross cottonseeds are obtained; (2) the obtained purified gross cottonseeds are sent to a delinter to have linter peeled and the impurity content of the purified gross cottonseeds is controlled, so that the cotton linter with low impurity is obtained; (3) the cotton linter with low impurity is sent to a lower linter collecting machine to have the dust eliminated, and the dedusted cotton linter is obtained; (4) the dedusted cotton linter is sent to a shell-linter separator where the linter is effectively separated from the impurities, and the cotton linter without impurity is obtained; (5) the cotton linter without impurity is sent to a cleaning machine where the linter is further separated with the impurities, and the high-quality cotton linter is obtained. According to the manufacturing method for the high-quality cotton linter, the gross cottonseeds are preliminarily purified, the cotton linter with the low impurity content is obtained through the delinter, and then the lower linter collecting machine, the shell-linter separator and the cleaning machine are utilized in sequence, so that the impurities and the dust in the cotton linter are eliminated, and the cotton linter which is low in dust content and impurity content, high in quality and even in mass distribution is obtained.

The invention discloses an absorbable operating suture line and a preparation method thereof, and mainly relates to a chitosan operating suture line. The preparation process comprises the following steps of: preparing a chitosan spinning solution, spinning, solidifying, performing subsequent treatment, and the like. By the process, chitosan is subjected to wet spinning, so that the roundness of the cross section of the chitosan operating suture line is increased, and the operability of the suture line is improved; and the suture line prepared by the process has high tensile strength and elasticity and meets the clinical requirement.

A display device includes a comparing portion extracting a minimum value and a maximum value of red, green, blue source image data signals, a first extracting portion extracting an intermediate signal from the minimum value and extracting a white image data signal from the intermediate signal, a second extracting portion extracting a red image data signal from the intermediate signal, the maximum data signal, and the red source image data signal, a third extracting portion extracting a green image data signal from the intermediate signal, the maximum data signal, and the green source image data signal, a fourth extracting portion extracting a blue image data signal from the intermediate signal, the maximum data signal, and the blue source image data signal, and a display panel having a plurality of pixels including red, green, blue, and white sub-pixels supplied with the red, green, blue, and white image data signals, respectively.