CN-224205557-U - Micro light-emitting diode display chip and display device

CN224205557UCN 224205557 UCN224205557 UCN 224205557UCN-224205557-U

Abstract

The application discloses a miniature light-emitting diode display chip and a display device, comprising a driving substrate, a first display module, a second display module and a first display module, wherein the first display module is arranged on the driving substrate and used for displaying first color light, the second display module is arranged on the driving substrate and used for simultaneously displaying second color light and third color light, and the second display module and the first display module are arranged at intervals and are positioned on the same plane. In the display chip, the first display module and the second display module which are positioned on the same plane are arranged on the driving substrate, and the first color light displayed by the first display module and the second color light and the third color light respectively emitted by the second display module realize full-color display of the whole chip, so that the problem that the image color is easy to misplace, blur or artifact in the three-color light combining process is avoided, and the color display capability of the display chip is improved.

Inventors

ZHANG XU
ZHUANG YONGZHANG
Zhang Nao

Assignees

镭昱光电科技(苏州)有限公司

Dates

Publication Date: 20260505
Application Date: 20250312

Claims (10)

1. A miniature light emitting diode display chip, comprising: A driving substrate including a plurality of contacts; The display device comprises a driving substrate, a first display module, a second display module, a first display module and a second display module, wherein the driving substrate is used for driving the display device to display first color light; The second display module is arranged on the driving substrate and used for simultaneously displaying second color light and third color light; the second display module is arranged at intervals with the first display module and is positioned on the same plane with the first display module, and comprises a plurality of second LED units which are arranged in an array manner, wherein the second LED units are independently driven through the corresponding contacts; Wherein the first LED unit is capable of emitting the first color light, one part of the second LED unit emits the second color light, and the other part emits the third color light, or The first display module further comprises a first wavelength conversion unit arranged on the first LED unit, the first wavelength conversion unit can convert light emitted by the first LED unit into first color light, the second display module further comprises a second wavelength conversion unit arranged on one part of the second LED unit and a third wavelength conversion unit arranged on the rest of the second LED unit, the second wavelength conversion unit can convert part of light emitted by the second LED unit into second color light, and the third wavelength conversion unit can convert the rest of light emitted by the second LED unit into third color light.
2. The miniature light emitting diode display chip of claim 1, further comprising: The bonding layer is arranged on the driving substrate; any one of the first LED unit and the second LED unit is electrically connected with the bonding layer; The first display module assembly further includes: A first passivation layer covering a side of the bonding layer and a side of the first LED unit; The first electrode layer covers one side of the first passivation layer, which is far away from the first LED unit, and the first passivation layer electrically isolates the first electrode layer from any one of the first LED unit and the bonding layer; the second display module assembly further includes: A second passivation layer covering a side of the bonding layer and a side of the second LED unit; The second electrode layer covers one side, far away from the second LED unit, of the second passivation layer, the second electrode layer is electrically isolated from any one of the second LED unit and the bonding layer by the second passivation layer, and the second electrode layer is electrically connected with the corresponding contact and part of the top surface of the second LED unit respectively.
3. The micro light emitting diode display chip of claim 1, further comprising: The LED driving device comprises a driving substrate, a grid layer, a first LED unit, a second LED unit, a third wavelength conversion unit, a first wavelength conversion unit, a second wavelength conversion unit and a third wavelength conversion unit, wherein the driving substrate is provided with a plurality of driving holes; the light reflecting layer at least covers the side wall of the grid hole; The etching barrier layer is positioned between the reflecting layer and at least one of the first display module and the second display module, and electrically isolates the reflecting layer from any one of the first display module and the second display module.
4. The micro light emitting diode display chip of claim 3, further comprising: the first filter layer is positioned on the surface of one side, far away from the first LED unit, of the first wavelength conversion unit, and is used for filtering other color lights and allowing the first color lights to pass through; The second filter layer is positioned on the surface of one side of the second wavelength conversion unit and/or the third wavelength conversion unit, which is far away from the second LED unit, and is used for filtering other color light and allowing the second color light and/or the third color light to pass through.
5. The micro light emitting diode display chip of claim 2, wherein at least one of the first LED unit and the second LED unit is a step structure, the step structure comprises a first doped semiconductor layer, a second doped semiconductor layer and an active layer located therebetween, the step structure electrically isolates the adjacent second doped semiconductor layer, active layer and first doped semiconductor layer from each other, and the contact is electrically connected to the corresponding first doped semiconductor layer.
6. The micro light emitting diode display chip of claim 1, wherein the driving substrate is a silicon-based CMOS driving board or a thin film field effect transistor driving board.
7. A display device comprising a micro light emitting diode display chip according to any one of claims 1 to 6.
8. The display device of claim 7, wherein the light emitting direction of the first display module and the second display module is a first direction, the direction in which the first display module and the second display module are arranged at intervals is a second direction, and the first direction intersects the second direction, the display device further comprising: the first light combination module is arranged corresponding to the first display module in the first direction, and is used for converting light emitted by the first display module from the first direction to the second direction and emitting the light; The second light combination module and the first light combination module are arranged at intervals in the second direction and are positioned on the same plane, the second light combination module and the second display module are correspondingly arranged in the first direction, and the second light combination module is used for converting light emitted by the second display module from the first direction to the second direction to emit, and transmitting the light emitted by the first display module.
9. The display device of claim 8, wherein the first light combining module has a first optical film facing the first display module, wherein an orthographic projection of the first optical film on the driving substrate along the first direction covers the first display module; The second light combining module is provided with a second optical film facing the second display module, and orthographic projection of the second optical film on the driving substrate along the first direction covers the second display module.
10. The display device according to claim 9, wherein the first optical film is inclined with respect to a surface of the first display module, the second optical film is inclined with respect to a surface of the second display module, and wherein the first optical film and the second optical film are disposed parallel to each other.

Description

Micro light-emitting diode display chip and display device Technical Field The application belongs to the technical field of micro display, and particularly relates to a micro light emitting diode display chip and a display device. Background The trichromatic light combining technique for synthesizing a color image using three basic color light sources of red, green, and blue has the advantage of high resolution and high brightness, which allows the color and brightness of each pixel to be controlled using three independent light sources. The miniature LED display chip has the advantages of small size, high brightness, low power consumption, quick response, long service life, high light efficiency and the like, and is a main color projection light source in the trichromatic light combining technology. However, during the light combining process, each individual light source is required to be precisely aligned in time and space so as to combine them into a seamless color image, and thus problems such as image color dislocation, blurring or artifacts may occur during the alignment process. Disclosure of utility model The utility model aims to provide a miniature light-emitting diode display chip and a display device, so as to solve the problems. In order to achieve the above purpose, the micro light emitting diode display chip of the present application comprises: A driving substrate; the first display module is arranged on the driving substrate and used for displaying first color light; The second display module is arranged on the driving substrate and used for simultaneously displaying second color light and third color light, and the second display module is arranged at intervals with the first display module and is positioned on the same plane with the first display module. In some embodiments, the drive substrate includes a plurality of contacts; The first display module comprises a plurality of first LED units which are arranged in an array manner, wherein the first LED units are independently driven through the corresponding contacts; The second display module comprises a plurality of second LED units which are arranged in an array, wherein the second LED units are independently driven through the corresponding contacts, one part of the second LED units emit the second color light, and the other part of the second LED units emit the third color light. In some embodiments, the drive substrate includes a plurality of contacts; The first display module comprises a plurality of first LED units which are arranged in an array manner and first wavelength conversion units which are arranged on the first LED units, wherein the first LED units are independently driven through corresponding contacts; the second display module comprises a plurality of second LED units which are arranged in an array, second wavelength conversion units arranged on one part of the second LED units and third wavelength conversion units arranged on the rest of the second LED units, wherein the second LED units are independently driven through corresponding contacts, the second wavelength conversion units can convert part of light emitted by the second LED units into second color light, and the third wavelength conversion units can convert the rest of light emitted by the second LED units into third color light. In some embodiments, further comprising: The bonding layer is arranged on the driving substrate; any one of the first LED unit and the second LED unit is electrically connected with the bonding layer; The first display module assembly further includes: A first passivation layer covering a side of the bonding layer and a side of the first LED unit; The first electrode layer covers one side of the first passivation layer, which is far away from the first LED unit, and the first passivation layer electrically isolates the first electrode layer from any one of the first LED unit and the bonding layer; the second display module assembly further includes: A second passivation layer covering a side of the bonding layer and a side of the second LED unit; The second electrode layer covers one side, far away from the second LED unit, of the second passivation layer, the second electrode layer is electrically isolated from any one of the second LED unit and the bonding layer by the second passivation layer, and the second electrode layer is electrically connected with the corresponding contact and part of the top surface of the second LED unit respectively. In some embodiments, further comprising: The LED driving device comprises a driving substrate, a grid layer, a first LED unit, a second LED unit, a third wavelength conversion unit, a first wavelength conversion unit, a second wavelength conversion unit and a third wavelength conversion unit, wherein the driving substrate is provided with a plurality of driving holes; the light reflecting layer at least covers the side wall of the grid hole; The etching barrier layer is positioned betwe