Patent ID: 12210245

DETAILED DESCRIPTION

The embodiments of the present disclosure will now be described with reference to the accompanying drawings. It is apparent that the described embodiments are only a part of embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by a person skilled in the art without involving any inventive effort are within the scope of the present disclosure. In addition, it is to be understood that the embodiments described herein are merely illustrative and explanatory, and are not intended to limit the present disclosure. In the present disclosure, terms indicating orientations or position relationships, such as “top”, “bottom”, “inside”, “outside”, or the like, are based on orientations or position relationships illustrated in the drawings, rather than indicate or imply that the devices or elements referred to herein are required to have specific orientations or be constructed or operate in the specific orientations, unless otherwise specifically defined.

Currently, with the increased requirement for thinning a direct-lit backlight LCD, there is problems that it is difficult to set up support columns on a side of a driving backplate close to an optical film, and the processing cost is increased.

Referring toFIGS.1-7, an embodiment of the present disclosure provides a backlight module100including:a driving backplate101; andan optical film102on a side of the driving backplate101light taking-offckplate.

The driving backplate101includes a substrate103, a plurality of electronic elements104, and an adhesive layer105.

The electronic elements104are disposed on a side of the substrate103close to the optical film102, and the adhesive layer105covers the electronic elements104.

The adhesive layer105includes a plurality of first adhesive-dispensed portions106, which are is in contact with the optical film102.

According to the present disclosure, when the driving backlight101is applied to the backlight module100, the first adhesive-dispensed portions106in the driving backlight101replace supporting columns to support the substrate103and the optical film102, thereby thinning the backlight module100while simplifying the manufacturing process and saving the processing cost.

The adhesive layer is disposed on the plurality of electronic elements, the adhesive layer comprises a plurality of first adhesive-dispensed portions arranged at intervals, the plurality of first adhesive-dispensed portions contact and support the optical film, and at least one edge of a support region formed by every four adjacent ones of the plurality of first adhesive-dispensed portions is at an angle with a row direction or a column direction of the plurality of electronic elements. Referring toFIGS.4to7, in an embodiment of the present disclosure, the adhesive layer105includes one or more support regions107. Each of the support regions107is in a polygon shape, and each of the first adhesive-dispensed portions106is disposed at a vertex of the polygon of the support region107. That is, the support region107is formed by a plurality of adjacent ones of the first adhesive-dispensed portions106. The polygon of the support region107is a virtual pattern formed by connecting a plurality of adjacent ones of the first adhesive-dispensed portions106.

The polygon of the support region107may be a triangle, a quadrangle, a pentagon, a hexagon, or the like. By setting the support region107, the first adhesive-dispensed portions106can be used to replace the support columns, so that the manufacturing process of the support columns can be omitted, and the thickness of the backlight module100to which the driving backplate101is applied is reduced, thereby simplifying the process and saving the processing cost.

Referring toFIG.3, in some embodiments, the electronic elements104include first electronic elements108. The first electronic elements108are arranged in an array on the substrate103. That is, the first electronic elements108are successively arranged in a row direction X and in a column direction Y. The spacing between any two of the first electronic elements108arranged in an array includes, but is not limited to, 2 mm, 4 mm, and the like.

The first electronic elements108may be light emitting diodes (LEDs), such as Mini-LEDs.

In some embodiments, the support regions107are arranged in the row direction X of the first electronic elements108. Alternatively, the support regions107are arranged in the column direction Y of the first electronic elements108. Alternatively, the support regions107are arranged in the row direction X and the column direction Y of the first electronic elements108. That is, the support regions107are arranged in an array on the substrate103.

By arranging the one or more support regions107in the row direction X and/or the column direction Y of the first electronic elements108, it can facilitate uniform distribution of the one or more support regions107on the substrate103, and further contribute to uniform support of the support regions107between the substrate103and the optical film102when the driving backplate101is applied to the backlight module100, thereby improving the product quality of the display device.

In some embodiments, all, part or none of the first adhesive-dispensed portions106in the same row may be equally spaced from each other along the row direction X of the first electronic elements108. All, part or none of the first adhesive-dispensed portions106in the same column may be equally spaced from each other along the column direction Y of the first electronic elements108. A spacing between adjacent two of the first adhesive-dispensed portions106in the row direction X may be the same as or different from a spacing between adjacent two of the first adhesive-dispensed portions106in the column direction Y.

Referring toFIGS.4-6, in some embodiments, the polygon of the support region107includes a first edge109and a second edge110adjacent to the first edge109. The first edge109extends in a direction parallel to the column direction Y of the first electronic elements108. Alternatively, the second edge110extends in a direction parallel to the row direction X of the first electronic elements108. Alternatively, the first edge109extends in a direction parallel to the column direction Y of the first electronic elements108, and the second edge110extends in a direction parallel to the row direction X of the first electronic elements108.

The first edge109is perpendicular, or not perpendicular to the second edge110. In the case that the first edge109is perpendicular to the second edge110, an extension direction of the first edge109is parallel to the column direction Y of the first electronic elements108, and an extension direction of the second edge110is parallel to the row direction X of the first electronic elements108. In the case that the first edge109is not perpendicular to the second edge110, the extension direction of the first edge109is parallel to the column direction Y of the first electronic elements108, or the extension direction of the second edge110is parallel to the row direction X of the first electronic elements108. By setting the extension direction of the first edge109to be parallel to the column direction Y of the first electronic elements108, or setting the extension direction of the second edge110to be parallel to the row direction X of the first electronic elements108, the polygon of the support region107at least has a side that is not parallel to the row direction X of the first electronic elements108or a side that is not parallel to the column direction Y of the first electronic elements108, thereby facilitating to reduce the Mura in the row direction X or the column direction Y, and improving the product quality of the display device to which the driving backplate101is applied.

In some embodiments, the polygon of the support region107further includes a third edge111and a fourth edge112. The third edge111and the second edge110are opposite to each other and are at two ends of the first edge109, respectively. The fourth edge112connects the second edge110and the third edge111. The extension direction of the first edge109is parallel to an extension direction of the fourth edge112, and the extension direction of the second edge110is parallel to an extension direction of the third edge111.

In the case that the first edge109is perpendicular to the second edge110, the third edge111is perpendicular to the fourth edge112, and the polygon of the support region107is a square or a rectangle.

In the case that the first edge109is not perpendicular to the second edge110, the third edge111is not perpendicular to the fourth edge112, and the polygon of the support region107is a parallelogram.

When the polygon of the support region107is a square or a rectangle, the extension directions of the first edge109and the fourth edge112are parallel to the column direction Y of the first electronic elements108, and the extension directions of the second edge110and the third edge111are parallel to the row direction X of the first electronic elements108.

When the polygon of the support region107is a parallelogram, the extension directions of the first edge109and the fourth edge112are parallel to the column direction Y of the first electronic elements108, and the extension directions of the second edge110and the third edge111are not parallel to the row direction X of the first electronic elements108. Alternatively, the extension directions of the first edge109and the fourth edge112are not parallel to the column direction Y of the first electronic elements108, and the extension directions of the second edge110and the third edge111are parallel to the row direction X of the first electronic elements108. When the polygon of the support region107is a parallelogram, at least two sides of the polygon are not parallel to the row direction X of the first electronic elements108or the column direction Y of the first electronic elements108, thereby facilitating to reduce the Mura in the row direction X or the column direction Y, and improving the product quality of the display device to which the driving backplate101is applied.

Referring toFIG.7, in some embodiments, the polygon of the support region107includes a first diagonal and a second diagonal intersecting with the first diagonal. The first diagonal extends in a direction parallel to the row direction X of the first electronic elements108, and/or the second diagonal extends in a direction parallel to the column direction Y of the first electronic elements108.

When the first diagonal is perpendicular to the second diagonal, the polygon of the support region107may be a diamond shape. In this case, the sides of the polygon of the support region107are not parallel to both the row direction X and the column direction Y of the first electronic elements108, thereby facilitating to reduce the Mura in the row direction X and the column direction Y, and improving the product quality of the display device to which the driving backplate101is applied.

In some embodiments, the number of the support regions107in the same row may be from 3 to 150 in the row direction X of the first electronic elements108. The number of the support regions107in the same column may be from 3 to 100 in the column direction Y of the first electronic elements108. By this arrangement, it facilitates reasonable and uniform distribution of the support regions107on the substrate103, and further facilitates uniform support of the support regions107between the substrate103and the optical film102when the driving backplate101is applied to the backlight module100, thereby improving the product quality of the display device.

In some embodiments, adjacent support regions107may share one or more same vertexes. In an embodiment, adjacent two of the support regions107may share the same one of the first adhesive-dispensed portions106. In another embodiment, adjacent two of the support regions107may share the same edge of the polygons of the support regions107, i.e., two adjacent support regions107may share two of the first adhesive-dispensed portions106.

In some embodiments, the electronic elements104further include second electronic elements113spaced from each other. Each of the second electronic elements113is disposed between any two of the first electronic elements108.

The second electronic elements113may be driving devices, such as driving chips, resistors, capacitors, buffers, or the like.

Referring toFIGS.1and2, in some embodiments, the first adhesive-dispensed portions106cover at least part of the first electronic elements108. Alternatively, the first adhesive-dispensed portions106cover at least part of the second electronic elements113. Alternatively, the first adhesive-dispensed portions106cover at least part of the first electronic elements108and at least part of the second electronic elements113.

The dispensing layer105may further include second adhesive-dispensed portions114. The first adhesive-dispensed portions106and the second adhesive-dispensed portions114are bonded to the substrate103and configured to encapsulate the electronic elements104. When the first adhesive-dispensed portions106cover at least part of the first electronic elements108, and/or the first adhesive-dispensed portions106cover at least part of the second electronic elements113, the first adhesive-dispensed portions106cover at least one of the first electronic elements108, and the second adhesive-dispensed portions114may cover the remaining electronic elements104, such as the first electronic elements108and the second electronic elements113not covered by the first adhesive-dispensed portions106.

When a volume of each of the second electronic elements113is larger than a volume of each of the first electronic elements108, the first adhesive-dispensed portions106preferably cover at least part of the second electronic elements113. When the volume of each of the second electronic elements113is less than the volume of each of the first electronic elements108, the first adhesive-dispensed portions106preferably cover at least part of the first electronic elements108. By this arrangement, it can facilitate the encapsulation function of the first adhesive-dispensed portions106, while saving materials and reducing costs.

In some embodiments, a thickness of the second adhesive-dispensed portions114is less than a thickness of the first adhesive-dispensed portions106.

When the first adhesive-dispensed portions106are in contact with the optical film102, the first adhesive-dispensed portions106replace the support columns to support the substrate103and the optical film102. The first adhesive-dispensed portions106are in a compression deformation state. The second adhesive-dispensed portions114are not in contact with the optical film102.

In some embodiments, a reflective layer is disposed on a side of the substrate103adjacent to the electronic elements104. The first adhesive-dispensed portions106include first adhesive-dispensed sub-portions covering at least part of the second electronic elements113. The first adhesive-dispensed sub-portions cover at least one of the second electronic elements113. An orthographic projection of the first adhesive-dispensed sub-portions on the substrate103covers an orthographic projection of at least part of the second electronic elements113on the substrate103.

A reflectivity of the first adhesive-dispensed sub-portions is greater than or equal to 70% and less than or equal to 90% of a reflectivity of the reflective layer. For example, the reflectivity of the first adhesive-dispensed sub-portions is 75%, 80%, 85%, and the like of the reflectivity of the reflective layer. By setting the reflectivity of the first adhesive-dispensed sub-portions to be greater than or equal to 70% and less than or equal to 90% of the reflectivity of the reflective layer, it can reduce the influence of the Mura and improve the product quality of the display device to which the driving backplate101is applied. For example, when the reflectivity of the first adhesive-dispensed sub-portions is 80% of the reflectivity of the reflective layer, the improvement of the Mura is optimal.

A material of the reflective layer may be white ink or other white reflective materials.

In some embodiments, a material of the first adhesive-dispensed portions106and a material of the second adhesive-dispensed portions114may include epoxy resin or silicone resin. The materials of the first adhesive-dispensed portions106and the second adhesive-dispensed portions114may be transparent. Alternatively, when the first adhesive-dispensed portions106include the first glue adhesive-dispensed sub-portions, the material of the first adhesive-dispensed sub-portions may be white glue. When the material of the first adhesive-dispensed sub-portions is white glue, the material of the first adhesive-dispensed sub-portions may include epoxy resin and titanium dioxide. Alternatively, the material of the first adhesive-dispensed sub-portions may include silicone resin and titanium dioxide.

When the material of the first adhesive-dispensed sub-portions is white glue, a mass fraction of titanium dioxide contained in the first adhesive-dispensed sub-portions is greater than or equal to 30%, and less than or equal to 45% of the total mass of the first adhesive-dispensed sub-portions. For example, the mass fraction of titanium dioxide contained in the first adhesive-dispensed sub-portions may be 32%, 34%, 35%, 36%, 38%, 40%, 42%, and the like. When the mass fraction of titanium dioxide contained in the first adhesive-dispensed sub-portions is greater than or equal to 30%, and less than or equal to 45% of the total mass of the first adhesive-dispensed sub-portions, it can allow the reflectivity of the first adhesive-dispensed sub-portions to be greater than or equal to 70%, and less than or equal to 90% of the reflectivity of the reflective layer, thereby reducing the influence of the Mura and improving the product quality of the display device to which the driving backplate101is applied.

When the material of the first adhesive-dispensed portions106includes epoxy resin or silicone resin, and the first adhesive-dispensed portions106replace the support columns, it can prevent the optical film102, in contact with the first adhesive-dispensed portions106, of the backlight module100from scratching, thereby improving the product quality of the display device.

In the above embodiments, each of the first adhesive-dispensed portions106includes a first surface in contact with the substrate103. A ratio of the thickness of the first adhesive-dispensed portions106to the maximum width of the first surface is greater than or equal to 1:1, and less than or equal to 4:1. For example, the ratio of the thickness of the first adhesive-dispensed portions106to the maximum width of the first surface may be 1.5:1, 2:1, 2.5:1, 3:1, 3.5:1, or the like. When the ratio of the thickness of the first adhesive-dispensed portions106to the maximum width of the first surface is greater than or equal to 1:1, and less than or equal to 4:1, it can reduce the influence of the Mura, and improve the product quality of the display device to which the driving backplate101is applied. For example, when the ratio of the thickness of the first adhesive-dispensed portions106to the maximum width of the first surface is 3:1, the improvement of the Mura is optimal.

Each of the second adhesive-dispensed portions114includes a second surface in contact with the substrate103. The first adhesive-dispensed portions106and the second adhesive-dispensed portions114may be hemispherical, ellipsoidal, cylindrical, elliptical cylinder, cubic, cuboid, or otherwise three-dimensional in shape. When the first adhesive-dispensed portions106and the second adhesive-dispensed portions114are hemispherical or cylindrical, an orthographic projection of the first surface on the plane in which the substrate103is located is a first circle. The maximum width of the first surface is a diameter of the first circle. An orthographic projection of the second surface on the plane in which the substrate103is located is a second circle. The maximum width of the second surface is a diameter of the second circle. When the first adhesive-dispensed portions106and the second adhesive-dispensed portions114are the ellipsoidal shape or elliptical cylinder, the orthographic projection of the first surface on the plane in which the substrate103is located is a first oval shape, the maximum width of the first surface is the length of the long axis of the first oval shape. The orthographic projection of the second surface on the plane in which the substrate103is located is a second oval shape, and the maximum width of the second surface is the length of the long axis of the second oval shape.

In the above embodiments, the maximum width of the first surfaces of the first adhesive-dispensed portions106may be 2 mm to 3 mm, the maximum width of the second surfaces of the second adhesive-dispensed portions114may be 2 mm to 3 mm, and the thickness of the first adhesive-dispensed portions106and the second adhesive-dispensed portions114may be 0.6 mm to 12 mm, respectively. Exemplarily, the thickness of the first adhesive-dispensed portions106may be 2 mm to 12 mm, the thickness of the second adhesive-dispensed portions114may be 0.6 mm to 1 mm. For example, the thickness of the first adhesive-dispensed portions106may be 4 mm, 6 mm, 9 mm, or the like, and the thickness of the second adhesive-dispensed portions114may be 0.7 mm, 0.8 mm, 0.9 mm, or the like.

In the above embodiments, a distribution area of the first adhesive-dispensed portions106and the second adhesive-dispensed portions114is greater than or equal to 20% and less than or equal to 85% of the area of the substrate103. For example, the distribution area of the first adhesive-dispensed portions106and the second adhesive-dispensed portions114may be 30%, 40%, 45%, 50%, 60%, 70%, 80%, or the like of the area of the substrate103. That is, a ratio of the sum of an area of an orthographic projection of the first surfaces of the first adhesive-dispensed portions106on the plane in which the substrate103is located and an area of an orthographic projection of the second surfaces of the second adhesive-dispensed portions114on the plane in which the substrate103is located, to an area of an orthographic projection of the third surface of the substrate103close to the electric elements104on the plane in which the electronic element104is located, is greater than or equal to 20% and less than or equal to 85%.

In the above embodiments, the driving backplate101has a driving mode including Active Matrix (AM), Passive Matrix (PM), and Micro Integrated Circuit Chip (Micro IC) driving. The Active Matrix driving is also referred to as active addressing, proactive addressing, active driving, or the like. The Passive Matrix driving is also referred to as passive addressing, passive driving, or the like. The driving backplate101has a dimension including but not limited to, 24 inches, 27 inches, 65 inches, and the like. The substrate103further includes a base on a side of the reflective layer away from the electronic elements104. The base may include a glass base, a PCB base, a BT base, or the like. When the base is a glass base, the thickness of the glass base includes but is not limited to 0.4 mm, 0.5 mm, 0.7 mm, or the like.

In the above-described embodiments, the optical film102includes a diffuser plate. Ends of the first adhesive-dispensed portions106of the driving backplate101adjacent to the optical film102are in contact with the diffuser plate. The diffuser plate is configured to convert a light source from the driving backplate101into a surface light source. The optical film102further includes a prism sheet, which is on a side of the diffuser plate away from the driving backplate101and is configured to converge light entering into the prism sheet to improve front brightness. The optical film102further includes a brightness enhancing film, which is on a side of the prism sheet away from the driving backplate101and is configured to improve the utilization rate of light emitted by the backlight module100to the driving backplate101. In some embodiments, the optical film102further includes a diffuser sheet, which is located between the diffuser plate and the prism sheet and is configured to further soften and diffuse light entering into the diffuser sheet to make light exiting the diffuser sheet more uniform.

In the backlight module100according to the embodiment of the present disclosure, the first adhesive-dispensed portions106replace the support columns to support the substrate103and the optical film102, thereby reducing the thickness of the backlight module100while simplifying the manufacturing process and saving the processing cost.

Referring toFIG.8, an embodiment of the present disclosure further provides a display device10including a backlight module100as described above and a display panel200on the side of the backlight module100light taking-off.

The specific structure of the backlight module100can refer to any one of the embodiments of the backlight module100and the accompanying drawings, and details are not repeated herein.

The display panel200may be a liquid crystal display panel. The display panel200includes an array substrate and a color film substrate opposite to each other. The display panel200further includes a liquid crystal layer between the array substrate and the array substrate. The display panel200further includes a first polarizer on a side of the display panel adjacent to the backlight module100, and a second polarizer on a side of the display panel200away from the backlight module100.

In the display device10according to the embodiment of the present disclosure, the first adhesive-dispensed portions106are disposed in the driving backplate101of the backlight module100, and the first adhesive-dispensed portions106replace the support columns to support the substrate103and the optical film102, thereby thinning the display device10, while simplifying the manufacturing process and saving the processing cost.

Embodiments of the present disclosure discloses the backlight module and the display device. The backlight module includes the driving backplate and the optical film on the side of the driving backplate light taking-off. The driving backplate includes the substrate, electronic elements, and the adhesive layer. The electronic elements are disposed on the side of the substrate close to the optical film. The adhesive layer covers the electronic elements and includes first adhesive-dispensed portions. The first adhesive-dispensed portions are in contact with the optical film. When the driving backplate is applied to the backlight module, the first adhesive-dispensed portions can replace the support columns to support the substrate and the optical film, thereby reducing the thickness of the backlight module while simplifying the manufacturing process and saving the processing cost.

Embodiments of the present disclosure illustrate in detail a backlight module and a display device. The principles and embodiments of the present disclosure are explained using exemplary embodiments, and the description of the above embodiment is merely provided to assist in understanding the method of the present disclosure and its core idea. For those skilled in the art, the exemplary embodiments and application scope of the present disclosure can be changed based on the ideas of the present disclosure. In summary, the contents of this specification should not be construed as a limitation of the present disclosure.

According to the present disclosure, when the driving backplate is applied to the backlight module, the first adhesive-dispensed portions in the driving backplate replace the support columns to support the substrate and the optical film, so that the thickness of the backlight module is reduced, the manufacturing process is simplified, and the processing cost is saved.