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Organic electroluminescence device and display method thereof

An electroluminescent device and display method technology, applied in circuits, electrical components, static indicators, etc., can solve the problems of screen color shift, low driving voltage, etc., to increase the light-emitting area, reduce color shift, compensate for The effect of low luminous efficiency

Active Publication Date: 2020-11-13
YUNGU GUAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the driving voltage of the red sub-pixel and the green sub-pixel is relatively low, and they can emit light normally under low-voltage driving, which makes the luminous efficiency of the red sub-pixel and the green sub-pixel higher than that of the blue sub-pixel in the case of low grayscale. The luminous efficiency of the pixel, and the screen body is prone to color cast (reddish) phenomenon

Method used

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  • Organic electroluminescence device and display method thereof
  • Organic electroluminescence device and display method thereof
  • Organic electroluminescence device and display method thereof

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Experimental program
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Effect test

Embodiment 1

[0045] First of all, it should be explained that the traditional organic electroluminescent device is a pixel unit composed of RGB three-color sub-pixels. In practical application, there is a large difference in efficiency of blue sub-pixels under different driving voltage conditions. Specifically, under high-voltage driving, the luminous efficiency of the blue sub-pixel is relatively high; under low-voltage driving, the luminous efficiency of the blue sub-pixel is lower than the normal level. However, the red sub-pixel and the green sub-pixel can normally emit light under low-voltage driving, and their luminous efficiency is relatively balanced. This leads to a large difference between the luminous efficiency of the red light sub-pixel unit and the green light sub-pixel unit and the luminous efficiency of the blue light sub-pixel under low-voltage driving, which in turn causes a color shift phenomenon on the screen.

[0046] In view of the above problems, an embodiment of the...

Embodiment 2

[0063] An embodiment of the present invention provides a display method of the organic electroluminescence device provided in the above embodiment 1, such as Figure 4 shown, including the following steps:

[0064] Step S21, provide an organic electroluminescent device, the organic electroluminescent device includes a plurality of pixel units distributed in an array, each pixel unit includes a red light sub-pixel unit 1, a green light sub-pixel unit 2 and a blue light sub-pixel unit 3, the blue light sub-pixel unit 3 The number is at least two, wherein each sub-pixel unit can be driven independently.

[0065] The organic electroluminescence device has been described in detail in Embodiment 1, and will not be repeated here.

[0066] Step S22 , judging the number of blue light sub-pixels to be turned on according to the brightness value requirements for the blue light sub-pixels.

[0067] That is, through the above display method, according to the brightness value requirement ...

Embodiment 3

[0077] This embodiment provides an organic electroluminescent device, including several pixel units distributed in an array, such as figure 2 As shown, each pixel unit includes a red sub-pixel unit 1, a green sub-pixel unit 2 and two blue sub-pixel units 3, and the blue sub-pixel unit 3 includes a first blue sub-pixel unit 31 and a second blue sub-pixel unit 32 , each sub-pixel unit can be driven independently.

[0078] Wherein, BCzVBI is selected as the luminescent material in the first blue sub-pixel unit 31 , and BCzVBI is selected as the luminescent material in the second blue sub-pixel unit 32 .

[0079] In this embodiment, the device structure of the red sub-pixel unit 1 is Ag(10nm) / ITO(100nm) / CuPc(20nm) / TPD(200nm) / CBP:Ir(piq) 3 (3%, 30nm) / TPBi(40nm) / LiF(1nm) / Mg:Ag(20%, 15nm) / NPB(60nm).

[0080] The device structure of the green sub-pixel unit 2 is Ag(10nm) / ITO(100nm) / CuPc(20nm) / TPD(200nm) / CBP:Ir(ppy) 3 (10%, 30nm) / TPBi(40nm) / LiF(1nm) / Mg:Ag(20%, 15nm) / NPB(60nm).

[...

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Abstract

The invention relates to the field of display technology, and discloses an organic electroluminescent device and a display method thereof. The device includes a plurality of pixel units distributed in an array, and each pixel unit includes a red light sub-pixel unit, a green light sub-pixel unit, and a blue light sub-pixel unit. The number of blue light sub-pixel units is at least two, and each blue light sub-pixel unit can be driven independently. That is, when the pixel unit is turned on, the number of turned on blue light sub-pixel units can be freely selected. In specific applications, under low-voltage driving, two or more blue sub-pixel units can be illuminated at the same time to increase the brightness of blue light, so as to reduce the difference in luminous efficiency between blue light, red light, and green light at different brightnesses , so as to solve the color cast problem.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an organic electroluminescence device and a display method thereof. Background technique [0002] Organic electroluminescent display (English full name Organic Light Emitting Display, referred to as OLED) is an active light-emitting display device. Due to its advantages such as simple manufacturing process, low cost, high contrast, wide viewing angle, and low power consumption, it is expected to become the next generation of mainstream flat panel. Display technology is one of the most concerned technologies in flat panel display technology. [0003] figure 1 It shows the voltage-brightness curves of the RGB three-color sub-pixels in the pixel juxtaposition method full-color display device. It can be seen from the figure that in the existing OLED display device, the turn-on voltages of the RGB three-color sub-pixels are inconsistent. Specifically, the turn-on voltage of the bl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/32G09G3/3208
CPCG09G3/3208H10K59/352H10K59/35
Inventor 田景文何麟李维维李梦真李田田
Owner YUNGU GUAN TECH CO LTD
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