# US 12,181,739 B2 · Backlight module and display panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,181,739 B2 - Document ID: US12181739B2 - Status: Granted - Kind: B2 - Application number: 17/769,772 - Filed: 2022-03-14 - Published: 2024-05-16 - Granted: 2024-12-31 - Earliest claimed: 2022-03-03 - Assignees: Wuhan China Star Optoelectronics Technology Co., Ltd. - Applicants: Wuhan China Star Optoelectronics Technology Co., Ltd. - Inventors: Zhihan Zhang; Zheng Zhou - Web page: https://patentgrep.com/patent/US12181739B2 ## CPC - G02F 1/133308: {Support structures for LCD panels, e.g. frames or bezels} - G02F 1/133314: {Back frames} - G02F 1/133608: {including particular frames or supporting means} - 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 The present disclosure provides a backlight module and a display panel, wherein the backlight module includes a backboard and a widening member, the widening member is disposed on at least one side of the outer frame opposite to the accommodation chamber and detachably connected to the outer frame. As such, when on-board display screens having a same visual area size but different appearance sizes are used, only the widening member needs to be changed to meet the requirements of the overall appearance size. The outer frame can be used in common, and thus a mold for the outer frame can be used in common, thereby significantly reducing the number of mold of the outer frame of the backlight module, and thereby reducing a cost of the backlight module. ## Claims ### Claim 1 A backlight module comprising: a backboard comprising a bottom board and an outer frame fixedly connected to the bottom board, wherein the outer frame surrounds the bottom board to form an accommodation chamber; and the outer frame comprises a first side and a second side opposite in a first direction and parallel to each other in a second direction different from the first direction and a third side and a fourth side opposite in the second direction and parallel to each other in the first direction; and a plurality of the widening members disposed on a side of the outer frame opposite to the accommodation chamber and detachably connected to the outer frame, wherein the plurality of the widening members are detachably connected to each other, and wherein for each of the one or more of the first side, the second side, the third side, and the fourth side, a sum of widths of the outer frame and the widening member attached to the outer frame is adjustable by replacing the widening member with an additional widening member with different width from that of the widening member, and the additional widening member is configured to detachably attached to the outer frame. ### Claim 2 (depends on 1) The backlight module according to claim 1, wherein a first sliding groove is disposed on the outer frame, and a first boss is disposed at a position of the widening member corresponding to the first sliding groove, and the first boss is accommodated within the first sliding groove and slidable in the first sliding groove. ### Claim 3 (depends on 2) The backlight module according to claim 2, wherein the first sliding groove comprises a first sub-groove and a second sub-groove in communication with each other, the first boss comprises a first sub-boss and a second sub-boss that are fixedly connected, the first sub-boss is accommodated within the first sub-groove and slidable in the first sub-groove, and the second sub-boss is accommodated within the second sub-groove and slidable in the second sub-groove. ### Claim 4 (depends on 3) The backlight module according to claim 3, wherein an opening size of the first sub-groove is larger than an opening size of the second sub-groove, and the second sub-groove is located on a side of the first sub-groove away from the accommodation chamber. ### Claim 5 (depends on 4) The backlight module according to claim 4, wherein a plurality of second bosses are disposed on an inner wall of the second sub-groove, second grooves are disposed at positions of the second sub-boss corresponding to the second bosses, and each of the second bosses is located within each of the second grooves. ### Claim 6 (depends on 5) The backlight module according to claim 5, wherein a stopper is further disposed on the outer frame, and the first sliding groove stops at the stopper. ### Claim 7 (depends on 6) The backlight module according to claim 6, wherein a vertical section shape of the second boss is a right-angled inverted trapezoidal shape, and wherein a right-angled side of the right-angled inverted trapezoidal shape is close to the stopper. ### Claim 8 (depends on 6) The backlight module according to claim 6, wherein a first chamfer is further disposed on a side of the outer frame away from the stopper, and a second chamfer is disposed on a side of the widening member close to the stopper. ### Claim 9 (depends on 5) The backlight module according to claim 5, wherein a width of the second boss is less than a width of the second groove, and a height of the second boss is less than a depth of the second groove. ### Claim 10 (depends on 5) The backlight module according to claim 5, wherein an interval between two adjacent bosses of the second bosses is 30 mm to 50 mm. ### Claim 11 (depends on 1) The backlight module according to claim 1, wherein widths of the plurality of the widening members are different. ### Claim 12 (depends on 1) The backlight module according to claim 1, wherein the widening members are disposed on both opposite sides of the outer frame opposite to the accommodation chamber, and widths of the widening members on the both sides are same or different. ### Claim 13 A display panel comprising a backlight module and a liquid crystal cell disposed in a light-exiting direction of the backlight module, wherein the backlight module comprises: a backboard comprising a bottom board and an outer frame fixedly connected to the bottom board, wherein the outer frame surrounds the bottom board to form an accommodation chamber; and the outer frame comprises a first side and a second side opposite in a first direction and parallel to each other in a second direction different from the first direction and a third side and a fourth side opposite in the second direction and parallel to each other in the first direction; and a plurality of the widening members disposed on a side of the outer frame opposite to the accommodation chamber and detachably connected to the outer frame, wherein the plurality of the widening members are detachably connected to each other, and wherein for each of the one or more of the first side, the second side, the third side, and the fourth side, a sum of widths of the outer frame and the widening member attached to the outer frame is adjustable by replacing the widening member with an additional widening member with different width from that of the widening member, and the additional widening member is configured to detachably attached to the outer frame. ### Claim 14 (depends on 13) The display panel according to claim 13, wherein a first sliding groove is disposed on the outer frame, and a first boss is disposed at a position of the widening member corresponding to the first sliding groove, and the first boss is accommodated within the first sliding groove and slidable in the first sliding groove. ### Claim 15 (depends on 14) The display panel according to claim 14, wherein the first sliding groove comprises a first sub-groove and a second sub-groove in communication with each other, the first boss comprises a first sub-boss and a second sub-boss that are fixedly connected, the first sub-boss is accommodated within the first sub-groove and slidable in the first sub-groove, and the second sub-boss is accommodated within the second sub-groove and slidable in the second sub-groove. ### Claim 16 (depends on 15) The display panel according to claim 15, wherein an opening size of the first sub-groove is larger than an opening size of the second sub-groove, and the second sub-groove is located on a side of the first sub-groove away from the accommodation chamber. ### Claim 17 (depends on 16) The display panel according to claim 16, wherein a plurality of second bosses are disposed on an inner wall of the second sub-groove, second grooves are disposed at positions of the second sub-boss corresponding to the second bosses, and each of the second bosses is located within each of the second grooves. ### Claim 18 (depends on 17) The display panel according to claim 17, wherein a stopper is further disposed on the outer frame, and the first sliding groove stops at the stopper. ### Claim 19 (depends on 18) The display panel according to claim 18, wherein a first chamfer is further disposed on a side of the outer frame away from the stopper, and a second chamfer is disposed on a side of the widening member close to the stopper. ### Claim 20 A backlight module comprising: a backboard comprising a bottom board and an outer frame fixedly connected to the bottom board, wherein the outer frame surrounds the bottom board to form an accommodation chamber, and the outer frame comprises a first side and a second side opposite in a first direction and parallel to each other in a second direction different from the first direction and a third side and a fourth side opposite in the second direction and parallel to each other in the first direction; and one or more first widening members detachably attached to one or more outside surfaces of the outer frame away from the accommodation chamber at one or more of the first side, the second side, the third side, and the fourth side, respectively, wherein the one or more first widening members are detachably connected to each other, wherein for each of the one or more of the first side, the second side, the third side, and the fourth side, a sum of widths of the outer frame and the first widening member attached to the outer frame is adjustable by replacing the first widening member with a second widening member with different width from that of the first widening member, and the second widening member is configured to detachably attached to the outer frame.