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CN-121978859-A - Backlight module and display device

CN121978859ACN 121978859 ACN121978859 ACN 121978859ACN-121978859-A

Abstract

The invention provides a backlight module and a display module, wherein the backlight module comprises an optical film group and a plurality of optical film fixing pieces, the optical film group comprises a plurality of optical films, the plurality of optical film fixing pieces are used for fixing the plurality of optical films, and the optical film group is arranged on a light guide plate. The optical film fixing pieces comprise colloids, the colloids are arranged between two adjacent stacked optical films, the colloids are provided with a first part and a second part which are connected, the first part comprises a plurality of convex parts and a plurality of concave parts, the convex parts and the concave parts are alternately arranged and connected with each other, a first optical film is arranged in the optical films, and the projections of the first parts of the optical film fixing pieces on the first optical film are staggered or mutually adjacent.

Inventors

  • YU YING
  • WANG XIAOLU
  • YUCHI LIANG

Assignees

  • 友达光电（苏州）有限公司
  • 友达光电（昆山）有限公司
  • 友达光电股份有限公司

Dates

Publication Date
20260505
Application Date
20260323

Claims (11)

  1. 1. A backlight module, comprising: an optical film set comprising a plurality of optical films, and A plurality of optical film fixing members, each optical film fixing member comprising: The colloid is arranged between two adjacent overlapped optical films and is provided with a first part and a second part which are connected, and the first part further comprises a plurality of convex parts and a plurality of concave parts; The plurality of convex portions and the plurality of concave portions are alternately arranged and connected with each other, wherein, The optical films are provided with a first optical film, and the projections of the first parts of the optical film fixing pieces on the first optical film are staggered or mutually adjacent.
  2. 2. The backlight module of claim 1, wherein the two-dimensional shape projected by the plurality of concave portions and the plurality of convex portions on the first optical film comprises at least two of a straight line, an arc, and a curve.
  3. 3. A backlight module according to claim 2, wherein each recess and each projection comprises a central region and two peripheral regions, the central region and the peripheral regions being connected.
  4. 4. A backlight module according to claim 1, wherein the first portion is a glue area and the second portion is a glue-free area.
  5. 5. A backlight module according to claim 1 or 4, wherein the first portion has a first thickness and the second portion has a second thickness, the second thickness being greater than the first thickness.
  6. 6. A backlight module according to claim 5, wherein the gel comprises a body layer and at least one non-adhesive cover layer, the at least one cover layer covering at least one surface of the second portion.
  7. 7. The backlight module according to claim 6, wherein the at least one cover layer comprises a first cover layer, the body layer at the second portion comprises a top surface and a bottom surface opposite to each other, the first cover layer covers the bottom surface, and projections of the first cover layer on the first optical film and projections of the plurality of protrusions on the first optical film are alternately arranged in the first direction.
  8. 8. The backlight module of claim 1, wherein the projections of the first portions of the optical film fixing members onto the first optical film are staggered in a first direction, or The projections of the first parts of the optical film fixing pieces and the first optical film are staggered with each other along a second direction, or The projections of the first parts of the optical film fixing pieces on the first optical film are staggered with each other along the first direction and the second direction.
  9. 9. A backlight module according to claim 8, wherein the first portion has a first dimension in the second direction and the second portion has a second dimension in the second direction, the first dimension being substantially larger than the second dimension.
  10. 10. The backlight module according to claim 1, further comprising a bottom case, a light guide plate and a light emitting element, wherein the bottom case comprises a bottom plate and a side plate assembly which are connected in a bending manner, the bottom plate and the side plate assembly form a containing space, the light guide plate, the optical film set and the light emitting element are located in the containing space, the optical film set is stacked on the light guide plate, the side plate assembly comprises a first side wall, the light emitting element is disposed on the first side wall, the optical film set has a first side portion and a second side portion which are opposite, the first side portion is adjacent to the first side wall, and the plurality of optical film fixing pieces are located on the first side portion.
  11. 11. A display module, comprising: display panel, and The backlight module according to any one of claims 1 to 10, wherein the display panel is carried on the backlight module.

Description

Backlight module and display device Technical Field The invention relates to the technical field of display, in particular to a display device and a backlight module used by the same. Background With the development of technology, display devices are widely used in many electronic products, such as mobile phones, tablet computers, watches, automobiles, etc. Taking a liquid crystal display device as an example, the liquid crystal display device comprises a liquid crystal display panel and a backlight module, wherein the liquid crystal display panel is positioned on the backlight module, and the backlight module provides a backlight source for the liquid crystal display panel. A plurality of layers of optical films are arranged above the light guide plate in the backlight module, and fixing pieces are arranged between the plurality of layers of optical films. During use, the optical film is heated and thermally expands and deforms. Because the material and the structural design of traditional mounting (like ordinary double faced adhesive tape) lack effectual stress release ability, when optical diaphragm produced flexible deformation because of temperature variation, the mounting can form stronger restraint to it, leads to the unable effective release of deformation stress of optical diaphragm. The optical film may be locally warped, wrinkled or deflected along with the accumulation of the usage time, which affects the uniformity and visual effect of the display device. Disclosure of Invention In order to solve the above-mentioned problems, the present invention provides a backlight module, comprising: an optical film set comprising a plurality of optical films, and A plurality of optical film fixing members, each optical film fixing member comprising: The colloid is arranged between two adjacent overlapped optical films and is provided with a first part and a second part which are connected, and the first part further comprises a plurality of convex parts and a plurality of concave parts; The plurality of convex portions and the plurality of concave portions are alternately arranged and connected with each other, wherein, The optical films are provided with a first optical film, and the projections of the first parts of the optical film fixing pieces on the first optical film are staggered or mutually adjacent. In an embodiment of the foregoing backlight module, a two-dimensional shape of the plurality of concave portions and the plurality of convex portions projected on the first optical film includes at least two of a straight line, an arc and a curve. In an embodiment of the foregoing backlight module, each of the concave portions and each of the convex portions includes a middle region and two peripheral regions, and the middle region is connected to the peripheral regions. In an embodiment of the foregoing backlight module, the first portion is a glue area, and the second portion is a glue-free area. In an embodiment of the foregoing backlight module, the first portion has a first thickness, and the second portion has a second thickness, and the second thickness is greater than the first thickness. In an embodiment of the foregoing backlight module, the adhesive includes a body layer and at least one cover layer with non-adhesive property, and the at least one cover layer covers at least one surface of the first portion. In one embodiment of the backlight module, the projections of the first portions of the optical film fixing members on the first optical film are staggered in a first direction, or The projections of the first parts of the optical film fixing pieces and the first optical film are staggered with each other along a second direction, or The projections of the first parts of the optical film fixing pieces on the first optical film are staggered with each other along the first direction and the second direction. In an embodiment of the foregoing backlight module, the first portion has a first dimension in the second direction, and the second portion has a second dimension in the second direction, and the first dimension is substantially greater than the second dimension. In an embodiment of the foregoing backlight module, the at least one cover layer includes a first cover layer, the body layer at the second portion includes a top surface and a bottom surface opposite to each other, the first cover layer covers the bottom surface, and projections of the first cover layer on the first optical film and projections of the plurality of protrusions on the first optical film are alternately arranged in the first direction. In an embodiment of the foregoing backlight module, the backlight module further includes a bottom case, a light guide plate, and a light emitting element, the bottom case includes a bottom plate and a side plate assembly that are connected in a bending manner, the bottom plate and the side plate assembly form a receiving space, the light guide plate, the optical film set, and t