Display panel and display device

A display panel and optical path technology, which is applied in the direction of electric solid-state devices, semiconductor devices, diodes, etc., can solve the problems of device efficiency decline, etc., and achieve the effects of enhancing brightness, enhancing luminous brightness, and enhancing luminous effect

Active Publication Date: 2020-08-25
YUNGU GUAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in stacked devices, especially in top-emitting stacked devices, due to the microcavity effect in the top-emitting light-emitting structure layer, when the positions of the two light-emitting layers deviate, the device efficiency will drop sharply.

Method used

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  • Display panel and display device
  • Display panel and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0146] Please also refer to Image 6 , the display panel includes two light emitting structure layers 200 , the two light emitting structure layers 200 are stacked on each other, and a charge generation layer 400 is disposed between the two light emitting structure layers 200 . The two light-emitting structure layers 200 respectively include two light-emitting layers 211, and the two light-emitting layers 211 are respectively a first light-emitting layer 211a and a second light-emitting layer 211b.

[0147] In the display panel shown in Embodiment 1, the first optical path, the second optical path and the third optical path in the display panel are constructed according to the above formulas (1), (3) and (5).

[0148] m in the first optical path E1 between the first electrode layer 100 and the first light-emitting layer 211a 1 The value is 2, that is, the first optical path E1 between the first electrode layer 100 and the first light-emitting layer 211a is λ / 2, and the first ...

Embodiment 2

[0158] Based on the layer structure of the display panel in Embodiment 1, the position of the second light emitting layer 211b is gradually changed, so that the first optical path between the second light emitting layer 211b and the first electrode layer 100 gradually deviates. The display panel in Example 1 is made to emit red light, and the measured parameters are shown in the table below:

[0159]

[0160] Where THK is the distance between the second light emitting layer 211b and the first electrode layer 100 when the optical distance between the second light emitting layer 211b and the first electrode layer 100 is λ.

[0161] Please also refer to Figure 10 , set the position of the second light-emitting layer 211b according to the above table, and obtain the spectrum of the green light emitted by the second electrode layer 300, and obtain the spectrum of the green light as Figure 10 as shown, Figure 10 The abscissa of is the emission wavelength, and the ordinate is t...

Embodiment 3

[0163] The display panel in Example 1 is made to emit red light, and the display panel is at the target brightness, and the parameters in Example 1 are obtained as shown in the table below.

[0164]

[0165] Please also refer to Figure 11 , the spectrum of the red light emitted by the second electrode layer 300 of the display panel is measured, and the spectrum of the red light is obtained as Figure 11 as shown, Figure 11 The abscissa of is the emission wavelength, and the ordinate is the normalized luminescence intensity. Depend on Figure 11 It can be seen from the above table that the red light is a single peak, and the current efficiency is 82.95cd / A.

[0166] It can be seen from the above embodiments and test results that the embodiments of the present invention can not only enhance the luminous brightness of the same color, but also enhance the luminous effect.

[0167] An embodiment of the present invention further provides a display device, and the display de...

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Abstract

The invention discloses a display panel and a display device. The display panel comprises a first electrode layer, N light-emitting structure layers arranged on the first electrode layer in a stackedmode and a second electrode layer located on the light-emitting structure layers, and N is a positive integer; the light-emitting structure layers are provided with a plurality of light-emitting unitscorresponding to the sub-pixels, each light-emitting unit comprises a plurality of functional film layers arranged in a stacked mode, and one functional film layer is a light-emitting layer; a firstoptical path is arranged between the first electrode layer and the light-emitting layer in the ith light-emitting structure layer, the first optical path corresponds to the same color sub-pixel value,the first optical path and the wavelength of light emitted by the light-emitting unit are in a linear relation, and i is 1, 2, 3... N. According to the embodiment of the invention, the light-emittingbrightness of the same color can be enhanced, and the light-emitting effect can be enhanced.

Description

technical field [0001] The present invention relates to the display field, in particular to a display panel and a display device. Background technique [0002] With the rapid development of electronic equipment, users pay more and more attention to the performance of display screens. In some vehicle, TV and other usage scenarios, the service life of the display is particularly important. [0003] In order to improve the service life of the display screen, stacked devices are generally used in the prior art to prolong the service life of the device. This is because to achieve the same brightness, stacked devices theoretically only need half or less of the current density, and the lifetime of the device is an exponential function of the current density. Therefore, the life of the laminated device can be greatly extended. However, in stacked devices, especially top-emitting stacked devices, due to the microcavity effect in the top-emitting light-emitting structure layer, whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/32H01L51/50H01L51/52
CPCH10K59/35H10K50/818H10K50/82H10K50/11H10K50/856H10K59/32H10K50/852H10K50/19H10K50/81
Inventor 颜志敏李灏戴鸿奇刘俊伟
Owner YUNGU GUAN TECH CO LTD
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