Organic EL display device
View Patent ↗An organic EL display device includes: a TFT substrate that includes a display area in which pixels are arranged in a matrix; and a color filter substrate that is provided to face the TFT substrate and includes an area transmitting light in a predetermined wavelength range for each of the pixels. Each of the pixels of the TFT substrate includes a pair of electrodes, at least two light emission layers that are arranged between the pair of electrodes, and a charge generation layer that is arranged between the at least two light emission layers, is a layer to generate a pair of positive and negative charges, and has different film thicknesses in accordance with the predetermined wavelength range of the corresponding area.
1. An organic EL display device comprising:
a substrate on which a plurality of pixels are arranged in a matrix, the plurality of pixels including red pixels for emitting red light, green pixels for emitting green light, and blue pixels for emitting blue light;
an anode electrode in each of the plurality of pixels on the substrate;
a first light emission layer on the anode electrode;
a single charge generation layer for generating a pair of positive and negative charges, on the first light emission layer, the single charge generation layer extending over the red pixels, green pixels, and blue pixels, and the single charge generation layer having a first film thickness and a second film thickness, the first film thickness in the green pixels is greater than the second film thickness in the red pixels and the blue pixels;
a second light emission layer on the single charge generation layer;
a cathode electrode on the second light emission layer;
a red color filter in each of the red pixels;
a green color filter in each of the green pixels; and
a blue color filter in each of the blue pixels.
2. The organic EL display device according to claim 1 , wherein
the plurality of pixels further include white pixels for emitting white light,
a white color filter is disposed in each of the white pixels, and
the first film thickness in the white pixels is greater than the second film thickness in the red pixels and the blue pixels.
3. The organic EL display device according to claim 2 , wherein
one of the first light emission layer and the second light emission layer is configured to emit light in a wavelength range corresponding to yellow, and
another of the first light emission layer and the second light emission layer is configured to emit light in a wavelength range corresponding to blue.