CROSS-REFERENCE TO RELATED APPLICATIONS

This application is the U.S. national phase of PCT Application No. PCT/CN2018/105671 filed on Sep. 14, 2018, which claims priority to Chinese Patent Application No. 201721199932.9 filed on Sep. 19, 2017, which are incorporated herein by reference in their entireties.

TECHNICAL FIELD

The present disclosure relates to the field of display technology, and in particular to a light guide plate, a backlight module and a display device.

BACKGROUND

With the development of TFT-LCD (Thin Film Transistor Liquid Crystal Display) technology and advances in industrial technology, the production cost of a liquid crystal display is progressively decreasing, and the manufacturing process is becoming more and more perfect. TFT-LCDs have replaced cathode ray tube displays to become a mainstream technology in the field of flat panel display, and have become ideal display devices for consumers. However, a backlight of the liquid crystal display in the related art cannot effectively achieve a wide color gamut.

SUMMARY

In a first aspect, a light guide plate is provided. A plurality of blind holes is arranged at a first surface of the light guide plate. Each of the plurality of blind holes is filled with a light-converting unit. The light-converting unit comprises an accommodating cavity made of a light-transmitting material, and a light-converting material located in the accommodating cavity. A gap is between an outer wall of the accommodating cavity and an inner wall of each blind hole.

Optionally, the light-converting material comprises at least one of a quantum dot material and a fluorescent material.

Optionally, a diameter of each blind hole is in a range of 100 μm to 1000 μm, a depth of each blind hole is in a range of 100 μm to 1000 μm, and a diameter of the accommodating cavity is smaller than 100 μm.

Optionally, the light-transmitting material comprises a glass or a transparent resin.

Optionally, a plurality of diffusion dots is arranged on a light-entering surface of the light guide plate.

Optionally, the blind hole is cylinder-like, and each accommodating cavity is truncated cone-like.

Optionally, a refractive index of a medium filled into the gap is less than a refractive index of the light-converting material.

Optionally, the medium in the gap is air.

Optionally, the outer wall of the accommodating cavity is an inclined surface.

Optionally, the first surface is a light-exiting or a light-entering surface of the light guide plate.

In a second aspect, a backlight module is provided by embodiments of the present disclosure, including the light guide plate as described above, and further including a light source arranged on a side of the light-entering surface of the light guide plate and exciting the light-converting material to emit light.

Optionally, the light source comprises a LED array, and each LED in the LED array corresponds to at least one light-converting unit.

Optionally, the LED array is arranged on a transparent substrate, and a light reflecting layer is arranged on a side of the transparent substrate facing away from the LED array.

Optionally, further including: a light-shielding metal pattern located on the first surface of the light guide plate, in which an orthographic projection of the light-shielding metal pattern onto the first surface overlaps with an orthographic projection of the light-converting unit onto the first surface.

Optionally, the backlight module further includes at least one of a scattering film and a brightness enhancement film, and the scattering film and the brightness enhancement film are both located on a side of the light-shielding metal pattern facing away from the first surface of the light guide plate.

Optionally, each LED in the LED array is a blue LED.

In third aspect, a display device is provided by embodiments of the present disclosure, including the backlight module as described above.

