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US 12,751,134 B2Granted
Display panels and display devices
AssigneeWuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
InventorKailong Wu
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Abstract
A display panel and a display device are disclosed in the embodiments of the present disclosure. The display panel of the embodiments of the present disclosure saves an electron blocking layer between at least one of the third light emitting unit and the first hole transport layer as well as the second light emitting unit and the first hole transport layer, by increasing the thickness of the first hole transport layer, while the decrease in luminous efficiency of the light emitting devices corresponding to the second light emitting unit and/or the third light emitting unit is avoided, masks can be saved and process steps can be simplified.
Claims20
A display panel comprising:
- a substrate;
- a first conductive layer disposed on the substrate, wherein the first conductive layer comprises a plurality of first electrodes, a plurality of second electrodes, and a plurality of third electrodes;
- a first hole transport layer disposed on the first conductive layer;
- a first electron blocking layer disposed on the first hole transport layer, wherein the first electron blocking layer comprises:
- a first electron blocking portion disposed corresponding to the plurality of first electrodes;
- a first light emitting layer disposed on the first electron blocking layer, wherein the first light emitting layer comprises:
- a first light emitting unit disposed corresponding to the plurality of first electrodes, a second light emitting unit disposed corresponding to the plurality of second electrodes, and a third light emitting unit disposed corresponding to the plurality of third electrodes;
- a charge generation layer disposed on the first light emitting layer;
- a second hole transport layer disposed on the charge generation layer, wherein a thickness of the second hole transport layer is less than a thickness of the first hole transport layer;
- a second electron blocking layer disposed on the second hole transport layer, wherein the second electron blocking layer comprises:
- a fourth electron blocking portion disposed corresponding to the plurality of first electrodes, a fifth electron blocking portion disposed corresponding to the plurality of second electrodes, and a sixth electron blocking portion disposed corresponding to the plurality of third electrodes;
- a second light emitting layer disposed on the second electron blocking layer, wherein the second light emitting layer comprises:
- a fourth light emitting unit disposed corresponding to the plurality of first electrodes, a fifth light emitting unit disposed corresponding to the plurality of second electrodes, and a sixth light emitting unit disposed corresponding to the plurality of third electrodes;
- and
- a second conductive layer disposed on the second light emitting layer;
- wherein a side surface of the first hole transport layer away from the substrate is in direct contact with at least one of the second light emitting unit and the third light emitting unit.
13 more elements
A display device comprising a display panel, wherein the display panel comprises:
- a substrate;
- a first conductive layer disposed on the substrate, wherein the first conductive layer comprises a plurality of first electrodes, a plurality of second electrodes, and a plurality of third electrodes;
- a first hole transport layer disposed on the first conductive layer;
- a first electron blocking layer disposed on the first hole transport layer, wherein the first electron blocking layer includes:
- a first electron blocking portion disposed corresponding to the plurality of first electrodes;
- a first light emitting layer disposed on the first electron blocking layer, wherein the first light emitting layer comprises:
- a first light emitting unit disposed corresponding to the plurality of first electrodes, a second light emitting unit disposed corresponding to the plurality of second electrodes, and a third light emitting unit disposed corresponding to the plurality of third electrodes;
- a charge generation layer disposed on the first light emitting layer;
- a second hole transport layer disposed on the charge generation layer, wherein a thickness of the second hole transport layer is less than a thickness of the first hole transport layer;
- a second electron blocking layer disposed on the second hole transport layer, wherein the second electron blocking layer comprises:
- a fourth electron blocking portion disposed corresponding to the plurality of first electrodes, a fifth electron blocking portion disposed corresponding to the plurality of second electrodes, and a sixth electron blocking portion disposed corresponding to the plurality of third electrodes;
- a second light emitting layer disposed on the second electron blocking layer, wherein the second light emitting layer comprises:
- a fourth light emitting unit disposed corresponding to the plurality of first electrodes, a fifth light emitting unit disposed corresponding to the plurality of second electrodes, and a sixth light emitting unit disposed corresponding to the plurality of third electrodes;
- a second conductive layer disposed on the second light emitting layer;
- wherein a side surface of the first hole transport layer away from the substrate is in direct contact with at least one of the second light emitting unit and the third light emitting unit.
12 more elements
Dependencies are inferred from the claim text.