# US 12,001,096 B2 · Backlight module, assembly method of backlight module, and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,001,096 B2 - Document ID: US12001096B2 - Status: Granted - Kind: B2 - Application number: 18/090,636 - Filed: 2022-12-29 - Published: 2023-10-26 - Granted: 2024-06-04 - Earliest claimed: 2022-04-21 - Assignees: Mianyang Hkc Optoelectronics Technology Co., Ltd.; Hkc Corporation Limited - Applicants: Mianyang Hkc Optoelectronics Technology Co., Ltd.; Hkc Corporation Limited - Inventors: Danwang Song; Baohong Kang - Web page: https://patentgrep.com/patent/US12001096B2 ## CPC - G02B 6/0068: {Arrangements of plural sources, e.g. multi-colour light sources} - G02F 1/133603: {with LEDs} - G02B 6/0091: {of the light source relative to the light guide (G02B6/0021 takes precedence)} - G02F 1/133605: {including specially adapted reflectors} - G02B 6/0031: {Reflecting element, sheet or layer} - G02B 6/0055: {Reflecting element, sheet or layer} - G02B 6/0065: {Manufacturing aspects; Material aspects} - G02B 6/0083: {Details of electrical connections of light sources to drivers, circuit boards, or the like} - G02F 1/1333: Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) - G02F 2202/28: Adhesive materials or arrangements - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract A backlight module, an assembly method of the backlight module, and a display device are provided in the disclosure. The backlight module includes a backplane, a light bar, a light-guide plate, a reflective sheet fixed on a first side of the backplane, and an adhesive layer. The light bar includes a circuit board and multiple light sources. The circuit board has a first region and a second region connected with the first region. The multiple light sources are fixed on the first region. The adhesive layer is fixed on the second region. The light-guide plate is at least partially fixed on the second region via the adhesive layer. The light bar and the light-guide plate are both mounted on the first side of the backplane. The reflective sheet is between the backplane and the light-guide plate. ## Claims ### Claim 1 A backlight module, comprising a backplane, a light bar, a light-guide plate, a reflective sheet fixed on a first side of the backplane, and an adhesive layer, wherein the light bar comprises a circuit board and a plurality of light sources, wherein the circuit board has a first region and a second region connected with the first region, and the plurality of light sources are all fixed on the first region, the adhesive layer is fixed on the second region, and the light-guide plate is at least partially fixed on the second region via the adhesive layer; the light bar and the light-guide plate are both mounted on the first side of the backplane, and the reflective sheet is between the backplane and the light-guide plate; and the backlight module further comprises a reflective layer disposed between the circuit board of the light bar and the adhesive layer, wherein the reflective layer is configured to reflect part of light rays emitted from the plurality of light sources to enter the light-guide plate. ### Claim 2 (depends on 1) The backlight module of claim 1, wherein the circuit board extends in a first direction, the plurality of light sources are arranged in the first direction, and each two adjacent light sources in the plurality of light sources define a gap therebetween to form a plurality of gaps; and the adhesive layer has a plurality of adhesive portions arranged in the first direction, and the plurality of adhesive portions face the plurality of gaps in a one-to-one correspondence. ### Claim 3 (depends on 2) The backlight module of claim 2, wherein the adhesive portion has a second side, a first side, and a third side connected in sequence, wherein the first side is a side of the adhesive portion away from the light source, and the second side is opposite to the third side; and a chamfer is formed at a connection between the first side and the second side, and a chamfer is formed at a connection between the first side and the third side. ### Claim 4 (depends on 2) The backlight module of claim 2, wherein the adhesive portion is in a shape of triangle, polygon, trapezoid, or rectangle. ### Claim 5 (depends on 2) The backlight module of claim 2, wherein the reflective layer is fixed on the second region of the circuit board and extends in the first direction, and the adhesive layer is fixed on the reflective layer. ### Claim 6 (depends on 2) The backlight module of claim 2, wherein the reflective layer has a plurality of reflective blocks, wherein the plurality of reflective blocks are arranged in the first direction, and the plurality of reflective blocks face the plurality of light sources in a one-to-one correspondence. ### Claim 7 (depends on 5) The backlight module of claim 5, wherein the adhesive layer and the reflective layer together have a thickness ranging from 0.03 mm to 0.05 mm. ### Claim 8 A display device, comprising a display panel and a backlight module, the display panel being disposed on a light-emitting side of the backlight module, the backlight module comprising a backplane, a light bar, a light-guide plate, a reflective sheet fixed on a first side of the backplane, and an adhesive layer, wherein the light bar comprises a circuit board and a plurality of light sources, wherein the circuit board has a first region and a second region connected with the first region, and the plurality of light sources are all fixed on the first region, the adhesive layer is fixed on the second region, and the light-guide plate is at least partially fixed on the second region via the adhesive layer; the light bar and the light-guide plate are both mounted on the first side of the backplane, and the reflective sheet is between the backplane and the light-guide plate; and the backlight module further comprises a reflective layer disposed between the circuit board of the light bar and the adhesive layer, wherein the reflective layer is configured to reflect part of light rays emitted from the plurality of light sources to enter the light-guide plate. ### Claim 9 (depends on 8) The display device of claim 8, wherein the circuit board extends in a first direction, the plurality of light sources are arranged in the first direction, and each two adjacent light sources in the plurality of light sources define a gap therebetween to form a plurality of gaps; and the adhesive layer has a plurality of adhesive portions arranged in the first direction, and the plurality of adhesive portions face the plurality of gaps in a one-to-one correspondence. ### Claim 10 (depends on 9) The display device of claim 9, wherein the adhesive portion has a second side, a first side, and a third side connected in sequence, wherein the first side is a side of the adhesive portion away from the light source, and the second side is opposite to the third side; and a chamfer is formed at a connection between the first side and the second side, and a chamfer is formed at a connection between the first side and the third side. ### Claim 11 (depends on 9) The display device of claim 9, wherein the adhesive portion is in a shape of triangle, polygon, trapezoid, or rectangle. ### Claim 12 (depends on 9) The display device of claim 9, wherein the reflective layer is fixed on the second region of the circuit board and extends in the first direction, and the adhesive layer is fixed on the reflective layer; or the reflective layer has a plurality of reflective blocks, wherein the plurality of reflective blocks are arranged in the first direction, and the plurality of reflective blocks face the plurality of light sources in a one-to-one correspondence. ### Claim 13 (depends on 12) The display device of claim 12, wherein the adhesive layer and the reflective layer together have a thickness ranging from 0.03 mm to 0.05 mm. ### Claim 14 An assembly method of a backlight module, comprising: fixing a reflective sheet on a first side of a backplane; fixing a reflective layer on a circuit board of a light bar; forming an adhesive layer on the reflective layer, wherein the reflective layer is disposed between the circuit board of the light bar and the adhesive layer and configured to reflect part of light rays emitted from the plurality of light sources to enter the light-guide plate; attaching a light-guide plate to the adhesive layer to fix at least part of the light-guide plate on the light bar; and mounting the light bar and the light-guide plate on the first side of the backplane, the reflective sheet being between the backplane and the light-guide plate. ### Claim 15 (depends on 14) The assembly method of claim 14, wherein the light bar comprises a plurality of light sources, wherein the circuit board has a first region and a second region connected with the first region, wherein the assembly method further comprises: fixing the plurality of light sources on the first region of the circuit board, wherein each two adjacent light sources in the plurality of light sources define a gap therebetween to form a plurality of gaps; and forming an adhesive layer on the reflective layer comprising forming the adhesive layer on the second region, wherein the adhesive layer comprises a plurality of adhesive portions arranged in a first direction, and the plurality of adhesive portions face the plurality of gaps in a one-to-one correspondence. ### Claim 16 (depends on 15) The assembly method of claim 15, wherein forming the adhesive layer comprises: forming a chamfer at a connection between a first side and a second side of the adhesive portion, and forming a chamfer at a connection between the first side and a third second of the adhesive portion, wherein the first side is a side of the adhesive portion away from the light source, and the second side is opposite to the third side. ### Claim 17 (depends on 15) The assembly method of claim 15, wherein the adhesive portion is in a shape of triangle, polygon, trapezoid, or rectangle. ### Claim 18 (depends on 15) The assembly method of claim 15, wherein the reflective layer has a plurality of reflective blocks, wherein the plurality of reflective blocks are arranged in the first direction, and the plurality of reflective blocks face the plurality of light sources in a one-to-one correspondence; and forming the adhesive layer on the second region comprises forming the adhesive layer on the reflective layer that is fixed on the second region. ### Claim 19 (depends on 18) The assembly method of claim 18, wherein the adhesive layer and the reflective layer together have a thickness ranging from 0.03 mm to 0.05 mm.