JP2019129163A5

JP2019129163A5 - EL display panel manufacturing method and EL display device

Info

Publication number: JP2019129163A5
Application number: JP2018007701A
Authority: JP
Filing date: 2018-01-19
Publication date: 2021-02-12
Anticipated expiration: 2038-01-19

Claims

A method for manufacturing an EL display panel in which first-color pixels, second-color pixels, and third-color pixels are arranged in a matrix.
A second step of forming a second light emitting layer in common on the first color pixel, the second color pixel, and the third color pixel.
A third step of irradiating the second pixel and the second light emitting layer formed in the third pixel with the first light to modify the second light emitting layer.
An EL display panel characterized in that a fourth step of forming a third light emitting layer in common on the first color pixel, the second color pixel, and the third color pixel is performed. Production method.

A method for manufacturing an EL display panel in which first-color pixels, second-color pixels, and third-color pixels are arranged in a matrix.
The first step of forming the first light emitting layer on the first color pixel,
A second step of forming a second light emitting layer in common on the first color pixel, the second color pixel, and the third color pixel.
A third step of irradiating the second light emitting layer formed in the third pixel with the first light to modify the second light emitting layer,
An EL display panel characterized in that a fourth step of forming a third light emitting layer in common on the first color pixel, the second color pixel, and the third color pixel is performed. Production method.

A method for manufacturing an EL display panel in which first-color pixels, second-color pixels, and third-color pixels are arranged in a matrix.
A second step of forming a second light emitting layer on at least one of the pixels of the color, and
The second light emitting layer is irradiated with the first light to have a third step of modifying the second light emitting layer.
A method for manufacturing an EL display panel, which comprises performing a second step of forming the second light emitting layer and a third step of modifying the second light emitting layer a plurality of times.

A method for manufacturing an EL display panel in which first-color pixels, second-color pixels, and third-color pixels are arranged in a matrix.
A second step of forming a second light emitting layer on at least one of the pixels of the color, and
The second light emitting layer is irradiated with the first light to have a third step of modifying the second light emitting layer.
When the first light is applied to the second light emitting layer, the second light emitting layer emits light.
A method for manufacturing an EL display panel, characterized in that the first light is controlled based on the intensity of the light emission.

The first light is a laser beam having an ultraviolet wavelength or light generated by an LED.
The EL display panel according to claim 1 or 2, or claim 3 or 4, wherein the first light is applied to the second light emitting layer through the slit of the slit mask. Manufacturing method.

The second light emitting layer contains a guest material and a host material.
The second light emitting layer irradiated with the first light is
The bandgap of the guest material is larger than the bandgap of the host material.
The relative arrangement of the HOMO (Highest Occupied Molecular Orbital) of the guest material and the host material is lower in the guest material than in the host material.
The relative arrangement of the LUMO (Lowest Unoccupied Molecular Orbital) of the guest material and the host material is characterized by having at least one of the three relationships that the guest material is higher than the host material. The method for manufacturing an EL display panel according to claim 1, claim 2, claim 3, or claim 4.

Claim 1 or claim 2 or claim 2, wherein any one of the first light emitting layer, the second light emitting layer, and the third light emitting layer is formed by a thermal transfer technique. The method for manufacturing an EL display panel according to claim 3 or 4.

The second light emitting layer is formed by co-depositing a host material and a guest material.
The method for manufacturing an EL display panel according to claim 1, claim 2, or claim 3, or claim 4, wherein the guest material has a higher absorption rate of the first light than the host material.

The cathode electrodes of each of the first color pixel, the second color pixel, and the third color pixel have light transmission property.
The light generated in each of the first light emitting layer, the second light emitting layer, and the third light emitting layer has a structure emitted from the cathode electrode side.
The pixel electrodes of the pixels of each color are transparent electrodes.
A reflective film is formed on the lower layer of the pixel electrode,
It has light transmission between the pixel electrode of at least one color pixel of the first color pixel, the second color pixel, and the third color pixel and the reflection film. A thin film is formed,
The optical distance between the reflective film of the first color pixel and the cathode electrode, the optical distance between the reflective film of the second color pixel and the cathode electrode, and the third color. Of the optical distance between the reflective film of the pixel and the cathode electrode
The EL display panel according to claim 1 or 2, or claim 3 or 4, wherein the optical distance for the pixels of at least one color is different from the optical distance for the pixels of the other color. Manufacturing method.

An EL display device comprising the EL display panel manufactured by the method for manufacturing an EL display panel according to any one of claims 1 to 9.