# US 10,480,755 B2 · Back plate assembly with variable curvatures and backlight unit thereof

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- Number: US 10,480,755 B2
- Document ID: US10480755B2
- Status: Granted
- Kind: B2
- Application number: 15/977,137
- Filed: 2018-05-11
- Published: 2018-09-13
- Granted: 2019-11-19
- Earliest claimed: 2015-03-02
- Assignees: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Applicants: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Inventors: Shihhsiang Chen; Dehua Li
- Web page: https://patentgrep.com/patent/US10480755B2

## CPC

- F21V 14/02: by movement of light sources {(in vehicle head lamps F21S41/657)}
- G02F 1/133: Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements (arrangements or circuits for control of liquid crystal elements in a matrix, not structurally associated with these elements G09G3/36)
- G06F 1/1601: {Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays (constructional details related to flat displays integrated in a portable computer, e.g. laptop, handheld computer G06F1/1637; constructional details related to television receivers H04N5/64)}
- G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable}
- G09F 9/301: {flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED}
- H05K 5/0217: {Mechanical details of casings (covers, lids, hoods or members for covering apertures H05K5/03)}
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- 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
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

A back plate assembly with variable curvatures is disclosed. It comprises a flexible back plate, a connecting component, and an adjustment mechanism, and the adjustment mechanism comprises a connecting shaft disposed on the back plate, and the connecting component connects to the connecting shaft and abuts to the back plate, and the adjustment mechanism adjusts the connecting component on the connecting shaft to modulate clamping force of the back plate received from the connecting component. The back plate assembly can adapt to the backlight units and the display devices with different curvatures based on the requirement of the bend degree. Many kind of the back plate assemblies do not need to be manufactured to fit the backlight unit and the display device having different curvatures.

## Claims

### Claim 1

A back plate assembly with variable curvatures, comprising a flexible back plate, a connecting component, and an adjustment mechanism, wherein the adjustment mechanism comprises a connecting shaft disposed on the flexible back plate, and the connecting component is coupled to the connecting shaft and abuts the flexible back plate, and the adjustment mechanism adjusts the connecting component on the connecting shaft to modulate a clamping force of the flexible back plate received from the connecting component;
wherein a middle portion of the connecting component is coupled to the connecting shaft and two ends of the connecting component abuts to abut a back side of the flexible back plate, and the adjustment mechanism adjusts a position where the middle portion of the connecting component is located on the connecting shaft;
wherein the connecting component comprises two connecting arms and a moving block, wherein the moving block is set on the connecting shaft and is movable along an axis of the connecting shaft; and each of the two connecting arms has a first end that is coupled to the moving block such that the two connecting arms define an included angle; and
wherein the connecting shaft has a proximal end that is rotatably and directly mounted to the back side of the flexible back plate and an opposite, distal end that is in threading engagement with the moving block, and the adjustment mechanism comprises a driven module connecting to the connecting shaft and powering the connecting shaft to rotate so as to cause a movement of the moving block along the axis of the connecting shaft through the threading engagement between the distal end of the connecting shaft and the moving block, wherein the driven module is arranged between the back side of the flexible back plate and the moving block, such that the flexible back plate, the driven module, and the moving block are arranged in such an order in a direction defined by the axis of the connecting shaft and the driven module and the moving block are both arranged backward of the back side of the flexible back plate.

### Claim 2 (depends on 1)

The back plate assembly as claimed in claim 1, wherein the connecting component further comprises two moving plates, each of which is slidably coupled to the back side of the flexible back plate; and each of the two connecting arms has a second end, and the second ends of the two connecting arms are respectively hinged with the two moving plates.

### Claim 3 (depends on 1)

The back plate assembly as claimed in claim 1, wherein a plurality of elongated slide holes are disposed on each of the two moving plates, and limiting nails that penetrate through the elongated slide holes are fixed to the back plate, so that the two moving plates are slidable relative to the limiting nails.

### Claim 4

A backlight unit, comprising a backlight module and a back plate component with variable curvatures, the back plate comprising a flexible back plate, a connecting component, and an adjustment mechanism, wherein the adjustment mechanism comprises a connecting shaft disposed on the flexible back plate, and the connecting component is coupled to the connecting shaft and abuts the flexible back plate, and the adjustment mechanism adjusts the connecting component on the connecting shaft to modulate a clamping force of the flexible back plate received from the connecting component;
wherein a middle portion of the connecting component is coupled to the connecting shaft and two ends of the connecting component abut a back side of the flexible back plate, and the adjustment mechanism adjusts a position where the middle portion of the connecting component is located on the connecting shaft;
wherein the connecting component comprises two connecting arms and a moving block, wherein the moving block is set on the connecting shaft and is movable along an axis of the connecting shaft; and each of the two connecting arms has a first end that is coupled to the moving block such that the two connecting arms define an included angle; and
wherein the connecting shaft has a proximal end that is rotatably and directly mounted to the back side of the flexible back plate and an opposite, distal end that is in threading engagement with the moving block, and the adjustment mechanism comprises a driven module connecting to the connecting shaft and powering the connecting shaft to rotate so as to cause a movement of the moving block along the axis of the connecting shaft through the threading engagement between the distal end of the connecting shaft and the moving block, wherein the driven module is arranged between the back side of the flexible back plate and the moving block, such that the flexible back plate, the driven module, and the moving block are arranged in such an order in a direction defined by the axis of the connecting shaft and the driven module and the moving block are both arranged backward of the back side of the flexible back plate.

### Claim 5 (depends on 4)

The backlight unit as claimed in claim 4, wherein the connecting component further comprises two moving plates, each of which is slidably coupled to the back side of the flexible back plate; and each of the two connecting arms has a second end, and the second ends of the two connecting arms are respectively hinged with the two moving plates.

### Claim 6 (depends on 4)

The backlight unit as claimed in claim 4, wherein a plurality of elongated slide holes are disposed on each of the two moving plates, and limiting nails that penetrate through the elongated slide holes are fixed to the back plate, so that the two moving plates are slidable relative to the limiting nails.