FIELD OF INVENTION

The present invention relates to the field of flat display technology, and more particularly, to a display panel module, which provides an under-screen camera solution.

BACKGROUND OF INVENTION

It is known that with continuous development of low temperature poly-silicon (LTPS) small-size display technology, full-screen technology has become a mainstream technology in the mobile phone market.

But until now, the “full screen” promoted in the market is still a pseudo full screen, that is, it just has a higher screen ratio, but it is not a “full screen” in the true sense. For this, the industry has developed a variety of technologies such as “notch type” full screen, “widow's peak type” full screen, and “blind hole type” full screen, which are derived from the goal of full screens. Their ever-increasing screen ratios are also pushing the full-screen technology to the extreme.

However, the three full-screen technologies mentioned above still need to drill a part of the display screen or cut the display screen in special shapes to expose a location region of the camera so that it allows outside light to enter for taking pictures. Therefore, this is one of the main reasons why these three technical solutions cannot achieve a true full-screen display solution.

For this reason, people have also tried to further increase the screen ratio by using the camera region for display. However, in the industry, there is currently no good solution on how to achieve a perfect combination of camera shooting and normal display of the region where the camera is located.

Technical Problem

According to one aspect of the present invention, a display panel module is provided, which adopts a novel panel structure and a backlight assembly structure in combination with a plurality of camera units disposed under the display panel, thereby providing a new type of under-screen camera solution.

SUMMARY OF INVENTION

The technical scheme adopted by the present invention is as follows: A display panel module, including a display panel which defines a camera area. A backlight assembly (BLU) is disposed under the display panel, and a camera is disposed under the backlight assembly; wherein the backlight assembly includes a circuit board and a plurality of light source units disposed on the circuit board at intervals; wherein the circuit board in the backlight assembly is inclined downward and recessed at a position corresponding to the camera region to form a hollow funnel shape with a top opening which is larger and a bottom opening which is smaller; wherein the top opening of the hollow funnel adjacent to the display panel is defined as a first opening, and the bottom opening adjacent to the camera is defined as a second opening; and wherein a light incident from outside of the display panel can enter the camera through the first opening and the second opening for taking pictures.

Further, in a different embodiment, a diameter of the second opening is equal to or smaller than a diameter of the camera.

Further, in a different embodiment, an aperture of the second opening is smaller than an aperture of the camera by 0-4 mm.

Further, in different embodiments, an inclination angle θ of the hollow funnel shape of the circuit board is in a range of 30°-70°. That is, the cross-section of the hollow funnel shape is an isosceles inverted trapezoid, and the inclination angle is 30°-70°. Specifically, it can be 35°, 45°, 50°, 60°, 65°, etc., and it can be determined according to actual needs and is not limited.

Further, in different embodiments, a vertical depth of the hollow funnel shape of the circuit board is 50-600 μm.

Further, in a different embodiment, one to ten rows of the light source units are arranged in an inclined manner at intervals on an inclined inner sidewall of the hollow funnel shape, and the light source units in each row are arranged in a circle. The light source unit can be a mini-LED light source unit but is not limited thereto.

Further, in a different embodiment, a light-emitting angle of the light source unit provided on the circuit board ranges from 130 to 170 degrees. It is preferably about 160 degrees but is not limited thereto.

Further, in a different embodiment, the light source units provided on the inclined inner sidewall of the hollow funnel shape are individually controlled for each row of the light source units.

Further, in a different embodiment, the light source units provided on the inclined inner sidewall of the hollow funnel shape are individually controlled for each light source unit.

Further, in a different embodiment, driving voltages of the light source units in different rows provided on the inclined inner sidewall of the hollow funnel shape are different.

Further, in a different embodiment, the light source units provided on the circuit board corresponding to the camera region are RGB three-color mini-LED light source units arranged in turn at intervals.

Further, in a different embodiment, the display panel includes an array substrate, a liquid crystal cell, and a CF substrate. The liquid crystal cell can be one of PDLC or PNLC but is not limited thereto.

Further, in a different embodiment, the CF substrate includes sequentially disposed substrate glass, a photoresist layer, and a planarization layer (OC layer); wherein the photoresist layer in the camera region includes BM layer units arranged at intervals, and a transparent photoresist layer unit is arranged between the BM layer units, and alternatively, the planarization layer directly fills positions between the BM layer units.

Beneficial Effect

The invention relates to a display panel module, which adopts a novel panel structure and a backlight assembly structure in combination with a plurality of camera units disposed under the display panel, thereby providing a new type under-screen camera solution.

Further, the backlight assembly adopts a hollow funnel shape in a camera region so that external light can directly enter the camera thereunder, thereby the camera can perform normal shooting. In order to further ensure better shooting quality of the camera, the CF substrate of the display panel uses a new type photoresist layer structure in the camera region. Compared to three-color photoresist layer units that are usually arranged between BM layer units, the present application uses a transparent photoresist layer unit instead, or directly fills space between the BM layer units with a planarization layer. This change corresponds to the under-screen camera solution in the present application, and more external light can be prevented from being blocked by a color photoresist layer unit. With the transparent photoresist layer unit, light can more easily enter the display panel, so as to provide the camera with more sufficient light for taking pictures, thereby improving the shooting effect

In addition, since the backlight assembly adopts the hollow funnel structure in the camera region, which is an inclined shape, this causes light output to be uneven in the camera region. In order to ensure a normal display effect, the present application adopts three-color mini-LEDs as a backlight in the camera region, and the mini-LED light source units at the inclined sidewall position of the funnel shape are arranged in an annular array. In addition, a driving voltage of each row of mini-LED light source units on the sidewall, or even a driving voltage of each mini-LED light source, are controlled, and the driving voltage of each row of mini-LED light sources is adjusted to make light emission intensity thereof different. Finally, the light output of each row of light source units at the opening (i.e. the first opening) on the funnel shape is uniformized, thereby ensuring the display effect at the camera region.

