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We have developed a computational model and a test model for predicting the brightness, a visual perception term, achieved by high-dynamic-range (HDR) televisions and computer monitors, in particular, those with materials that feature primary colors having high spectral purity. Quantum dot materials in combination with emissive pixel lighting is expanding the color gamut level to attain a degree of performance unmatched in today’s consumer and professional displays. These displays exhibit highly significant improvements in colorfulness and brightness owing to their narrowband primaries and to the Helmholtz–Kohlrausch (H–K) effect, where colors—notably reds and blues—are perceived as far brighter than their reference white. We blended the iCAM06 computational model originally designed for HDR image evaluation with an improved treatment of vivid colors. Our data collection relied on a rare, yet commercially available 2D spectroradiometer that captures up to 1.4 million samples of spectral data across any image, an achievement impossible to attain manually. Our approach coupled nicely with the filter image-processing steps in iCAM06. Finally, we extracted image brightness for white, red, and blue for determining the SEMI perceptual contrast length (PCL) to assess the predicted improvement level of our model and then matched those results to subjective experiments. As a result, we have a methodology that can be used by display makers to measure and predict brightness as a function of colorfulness to optimize luminance—notably for reducing power—in displays with spectrally pure primaries .

Cost-effective Display Driver IC architecture with an external memory is presented. Low-power and high-speed memory interface is proposed to minimize the increase of power consumption and the number of pins. The measured power consumption was less than 45mW with four 1.6Gbps data lanes, 1 clock lane and 1 command lane.

This paper investigated the a-si:H gate driver with the stepwise gate signal. In 1-chip type mobile LCD application the stepwise gate signal for low power consumption can be used by adding simple switching circuit. The power consumption of the a-Si:H gate driver can be decreased by employing the stepwise gate signal in the conventional circuit. In conventional one, the effect of stepwise gate signal can decrease slew rate and increase the fluctuation of gate-off state voltage, In order to increase the slew rate and decrease the gate off state fluctuation, we proposed a new a-Si:H TFT gate driver circuit. The simulation data of the new circuit show that the slew rate and the gate-off state fluctuation are improved, so the circuit can work reliably.

Compare to the conventional twisted nematic (TN) mode TFT-LCD fabrication process, so far suggested method for the wide viewing angle modes require extra mask-counts. Patterning of the color filter common electrode to achieve the multi-domain vertical alignment (VA) mode costs additional process step. In addition, to avoid improper disclinations, strict alignment margin is necessary. Enhanced vertical alignment (EVA) mode has been developed where the multi-domain cell is formed by the interaction between fringe fields of the pixel electrodes and protrusions on the TFT-array panel. Compared to the TN-mode, since the common electrode is not patterned, EVA mode does not require any additional mask-count. Using the combinations of multi-layer overlap patterns with gate metal, gate dielectrics, passivation nitride, and source/drain metal, protrusions can be formed during the normal TFT-array fabrication process. Viewing angle of the EVA mode can even surpass other wide viewing modes.