Display device
View Patent ↗A display device is provided with a backlight module, a lower polarizing plate, a liquid crystal display panel, and an upper polarizing plate. In the display device of the present disclosure, when MicroLED luminescent units are turned on, a normal display is realized within a transparent display area. At the same time, images are collected through the transparent display area anytime and then sensed by an under-screen sensor. The transparent display area and the main display area are seamlessly connected so that there is no visual display interruption and discontinuous boundary, and a complete full-screen design is achieved.
1. A display device, comprising:
a backlight module;
a lower polarizing plate disposed on the backlight module, wherein the lower polarizing plate is provided with a second through hole;
a liquid crystal display panel disposed on one side of the lower polarizing plate away from the backlight module, wherein the liquid crystal display panel comprises a main display area and a transparent display area, and the main display area surrounds the transparent display area;
an upper polarizing plate disposed on one side of the liquid crystal display panel away from the lower polarizing plate, wherein the upper polarizing plate is provided with a first through hole, and the first through hole and the second through hole correspond to the transparent display area;
wherein the first through hole is provided with a plurality of micro light emitting diode (MicroLED) luminescent units.
2. The display device according to claim 1 , wherein the transparent display area is provided with a transparent substrate disposed on one side of the liquid crystal display panel away from the backlight module; and
the MicroLED luminescent units are disposed on the transparent substrate.
3. The display device according to claim 2 , wherein
one of the MicroLED luminescent units comprises a red luminescent unit, a green luminescent unit, and a blue luminescent unit.
4. The display device according to claim 2 , wherein
the MicroLED luminescent units have an area smaller than an area of sub-pixels of the liquid crystal display panel.
5. The display device according to claim 4 , wherein
the MicroLED luminescent units have a length ranging from 1 to 500 μm, and the sub-pixels of the liquid crystal display panel have a length ranging from 10 to 1000 μm; and
the liquid crystal display panel has a transmittance ranging from 50% to 100% within the transparent display area.
6. The display device according to claim 3 , wherein
the red luminescent unit comprises the blue luminescent unit and a conversion film coated on the blue luminescent unit so that the conversion film is excited by the blue luminescent unit to realize a light emission of the red luminescent unit;
the green luminescent unit comprises the blue luminescent unit and a conversion film coated on the blue luminescent unit so that the conversion film is excited by the blue luminescent unit to realize a light emission of the blue luminescent unit; and
the conversion film is formed by quantum dots or fluorescent powder.
7. The display device according to claim 1 , wherein
the upper polarizing plate is a metal wire grid polarizing plate;
the metal wire grid polarizing plate comprises:
a light transmission substrate;
a medium layer disposed on the light transmission substrate; and
a plurality of metal wires disposed on one side of the medium layer away from the light transmission substrate;
wherein the metal wire grids has a period of 20-500 nm, a duty cycle of 0.1-0.9, and a height of 10-500 nm.
8. The display device according to claim 7 , wherein
the metal wire grids comprise Al, Ag, or Au which is a material with a larger refractive index; and
a material of the medium layer comprises SiO 2 , SiO, MgO, Si 3 N 4 , TiO 2 , or Ta 2 O 5 .
9. The display device according to claim 1 , wherein
the upper polarizing plate is a coated orientation polarizer including a polarizer and an orientation ligand.
10. The display device according to claim 1 , wherein
the backlight module is an edge-lit backlight module comprising:
a light guide plate having a through via corresponding to the transparent display area; and
a backlight source disposed on a side of the light guide plate;
wherein the through via is provided with a sensor module; and
the sensor module includes a fingerprint recognition sensor, a camera sensor, a structured light sensor, a time of flight sensor, a distance sensor, or a light sensor.