OELD (Organic Electron Luminescence) display device and display method thereof

Abstract

The invention provides an OELD (Organic Electron Luminescence) display device and a display method thereof and relates to the technical field of display, and the display device can be used for solving the problem that subpixels in different colors of an existing display device are different in decay rate along with different display time, and thus the display white balance of the display device is subjected to red deviation. According to the display method of the OELD display device, each pixel unit of the display device at least comprises subpixels with red, green and blue base colors. The method comprises the following steps: when each pixel unit in a first region of a display image only drives and lightens the blue subpixel, reducing a corresponding gray-scale value of the blue subpixel of the first region; and / or when each pixel unit in a second region of the display image only drives and lightens the red subpixel, improving a corresponding gray-scale value of the red subpixel of the second region; and / or when each pixel unit in a third region of the display image only drives and lightens the green subpixel, improving a corresponding gray-scale value of the green subpixel of the third region.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an organic electroluminescence display and a display method thereof. Background technique [0002] The lifetime of OLED (Organic Light) Emitting Diode (Organic Light Emitting Diode) display depends on initial brightness, environmental factors (temperature, humidity, ultraviolet light in ambient light), device efficiency, working mode (DC, AC), device light emitting area Wait. The reasons for the aging of OLED displays mainly come from two aspects. One is that the Thin Film Transistor (TFT) in the pixel drive circuit is driven by the operating voltage, and its characteristic parameters such as threshold voltage drift and IR voltage drop cause switching TFT And / or the operating point of the driving TFT changes, which in turn causes the driving voltage or current on the OLED to change. The second is that the OLED device itself increases with the increase of working time, and its d...

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Problems solved by technology

The second is that with the increase of the working time of the OLED device itself, under the constant driving current, the working voltage of the device gradually increases, and the luminous efficiency becomes lower and lower.

especially if figure 1 As shown, the brightness of the blue sub-pixel 3 in the OLED display decays quickly with time, and the brightness of the green sub-pixel 1 and red sub-pixel 2 decays slowly with time, and the color coordinates of the device luminescence drift and the white balance appears red shift phenomenon , that is, the white balance tends to be warmer during full-color display, which seriously affects the service life of the display

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