Lg Display Co., Ltd.

Kyongho Lim

Sunhee Park

Jaehong Kim

Moojong Lim

Dongyou Lee

Hongseop Shin

A system for evaluating a quality of a transparent display, the system including: a background including any one of a full white pattern, a full black pattern, and a circle white pattern; a light detector positioned a first distance away from the background to measure luminance of the full white pattern, the full black pattern and the circle white pattern; and a circle transparent pattern displayed on the transparent display by passing light from at least one of the full white pattern, the full black pattern and the circle white pattern, further the transparent display is positioned between the background and the light detector and at a second distance away from the light detector, further a purity of the transparent display is calculated based on luminance of the full white pattern, the full black pattern, and the circle white pattern as measured by the light detector through the transparent display.

System for evaluating displaying quality of transparent display and method thereof

A display device and a luminance control method therefore are provided. The display device comprises a luminance controller that establishes multiple peak luminance control (PLC) points by equally dividing a PLC curve and limits the luminance at the PLC point corresponding to the highest average pixel level (APL) at the initial luminance as the PLC curve slopes downward.

Display device and luminance control method therefore

Provided is an organic light emitting diode display including a display panel having data lines, gate lines, and pixels disposed in a matrix form in a crossing region of the data lines and the gate lines, a gamma reference voltage adjustment unit that calculates a weighted average picture level of digital video data, adjusts gamma reference voltages so that peak luminance of the display panel is reduced as the weighted average picture level is increased, and outputs the adjusted gamma reference voltages, a data driving circuit converting the digital video data into analog data voltages by using the gamma reference voltages, and supplying the data voltages to the data lines, and a gate driving circuit sequentially outputting gate pulses to the gate lines.

Organic light emitting diode display having function for controlling peak luminance using weighted average picture level and method for driving the same

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Paju-si, South Korea

Kyongho Lim