To improve color reproduction areas in a display device having light-emitting elements. A display region has a plurality of picture elements. Each picture element includes: first and second pixels each including a light-emitting element which has a chromaticity whose x-coordinate in a CIE-XY chromaticity diagram is 0.50 or more; third and fourth pixels each including a light-emitting element which has a chromaticity whose y-coordinate in the diagram is 0.55 or more; and fifth and sixth pixels each including a light-emitting element which has a chromaticity whose x-coordinate and y-coordinate in the diagram are 0.20 or less and 0.25 or less, respectively. The light-emitting elements in the first and second pixels have different emission spectrums from each other; the light-emitting elements in the third and fourth pixels have different emission spectrums from each other; and the light-emitting elements in the fifth and sixth pixels have different emission spectrums from each other.

Display device and electronic device

A method of determining implied sample areas for each data point of each color in a source pixel data specified in a first sub-pixel format is used for sub-pixel rendering an image on a display specified in a second sub-pixel format. Each of the first and second sub-pixel formats comprises a plurality of colored sub-pixels. The method comprises determining a geometric center of each colored sub-pixel of the first format to define a sampling point; and defining each implied sample area by forming lines that are substantially equidistant between the sampling point of one colored sub-pixel and the sampling point of another neighboring same color colored sub-pixel. A similar technique may be used for determining resample areas for computing color values for rendering an image specified in a first sub-pixel format on a display substantially comprising a plurality of colored sub-pixels arranged in a second sub-pixel format.

Conversion of a sub-pixel format data to another sub-pixel data format

Processing data for a display including pixels, each pixel having color sub-pixels, comprises receiving pixel data. Once the pixel data is received, processing data for a display includes converting the pixel data to sub-pixel rendered data, the conversion generating the sub-pixel rendered data for a sub-pixel arrangement including alternating red and green sub-pixels on at least one of a horizontal and vertical axis. Next processing data for a display includes correcting the sub-pixel rendered data if a condition exists and outputting the sub-pixel rendered data.

Methods and Systems for Sub-Pixel Rendering with Adaptive Filtering

An organic light-emitting display device and a method of its manufacture are provided, whereby manufacturing processes are simplified and display quality may be enhanced. The display device includes: an active layer of a thin film transistor (TFT), on a substrate and including a semiconducting material; a lower electrode of a capacitor, on the substrate, doped with ion impurities, and including a semiconducting material; a first insulating layer on the substrate to cover the active layer and the lower electrode; a gate electrode of the TFT, on the first insulating layer; a pixel electrode on the first insulating layer; an upper electrode of the capacitor, on the first insulating layer; source and drain electrodes of the TFT, electrically connected to the active layer; an organic layer on the pixel electrode and including an organic emission layer; and a counter electrode facing the pixel electrode, the organic layer between the counter electrode and the pixel electrode.

Organic light emitting display device and method of manufacturing the same

Novel three-color and four-color subpixel arrangements and architectures for display and the like are herein disclosed Novel techniques for subpixel rendering on the above subpixel arrangements are also herein disclosed

Four color arrangements of emitters for subpixel rendering

Although LCDs are widely used in power-consumption critical applications, they are not very energy-efficient. The largest absorber of light is the color filter. We developed a TFT-LCD with four-color subpixels: red, green, blue and white. The addition of the white subpixel greatly enhanced the light efficiency: up by 50%. The RGB-to-RGBW mapping algorithm was designed so that the hue and saturation remains unchanged from the original color. The result is a very bright display with color characteristic almost identical to RGB LCDs.

40.5L: Late‐News Paper: TFT‐LCD with RGBW Color System

Last year, we introduced a TFT-LCD with RGBW color system. The primary advantage of the RGBW system is that its optical efficiency is at least 50% higher than the RGB system. However, it is not a simple task to incorporate the new color system into the existing infrastructure of the RGB system: the driving circuitry, fabrication of color filter, and color conversion. In this report, the practical hurdles are discussed and the solutions are presented.

9.2: Implementation of RGBW Color System in TFT-LCDs

We developed the multiple primary color LCD's where the pixels were composed of red(R), green(G), blue(B), cyan(C), magenta(M) and yellow(Y) subpixels. The color gamut was extended 99% of NTSC standard, while the brightness was also increased by 15%, compared to the conventional RGB three primary color LCD's. To get a natural color image we designed the color coordinates and luminance levels of each six subpixles, and developed color algorithm to convert the RGB signal to RGBCMY signal.

31.1: Development of Six Primary‐Color LCD

Digital images captured from CMOS image sensors suffer Gaussian noise and impulsive noise. To efficiently reduce the noise in Image Signal Processor (ISP), we analyze noise feature for imaging pipeline of ISP where noise reduction algorithm is performed. The Gaussian noise reduction and impulsive noise reduction method are proposed for proper ISP implementation in Bayer domain. The proposed method takes advantage of the analyzed noise feature to calculate noise reduction filter coefficients. Thus, noise is adaptively reduced according to the scene environment. Since noise is amplified and characteristic of noise varies while the image sensor signal undergoes several image processing steps, it is better to remove noise in earlier stage on imaging pipeline of ISP. Thus, noise reduction is carried out in Bayer domain on imaging pipeline of ISP. The method is tested on imaging pipeline of ISP and images captured from Samsung 2M CMOS image sensor test module. The experimental results show that the proposed method removes noise while effectively preserves edges.

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CMOS Image Sensor Noise Reduction Method for Image Signal Processor in Digital Cameras and Camera Phones

PURPOSE: An RGBW LCD is provided to modify the arrangement of pixels for improving the luminance of the LCD by 50-70% more than an RGB LCD by white pixels without any additional design or driving. CONSTITUTION: An RGBW LCD includes pixel groups formed of mth pixel line(1X) and nth pixel line(2X), wherein m and n are respectively odd and even numbers. When a first dot(51) is formed of red, green and blue pixels, and a second dot(52) is formed of red, green and white pixels, the first and second dots are arranged in sequence in the mth pixel line. In the nth pixel line adjacent to the mth pixel line, the mth pixel line is shifted in the line direction by a dot, so that the second and first dots are arranged in sequence in the nth pixel line.

Chang-Yong Kim

Papers

40.5L: Late‐News Paper: TFT‐LCD with RGBW Color System

9.2: Implementation of RGBW Color System in TFT-LCDs

31.1: Development of Six Primary‐Color LCD

CMOS Image Sensor Noise Reduction Method for Image Signal Processor in Digital Cameras and Camera Phones

Rgbw lcd for improving luminance