US20190033661A1 - Backlight module assembly, structural adjustment method thereof and display device - Google Patents

Backlight module assembly, structural adjustment method thereof and display device Download PDF

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Publication number
US20190033661A1
US20190033661A1 US15/758,731 US201715758731A US2019033661A1 US 20190033661 A1 US20190033661 A1 US 20190033661A1 US 201715758731 A US201715758731 A US 201715758731A US 2019033661 A1 US2019033661 A1 US 2019033661A1
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US
United States
Prior art keywords
adjustment
backlight module
module assembly
film
adjustment sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US15/758,731
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English (en)
Inventor
Jiang Zhu
Hongchao HE
Jianghui ZHAN
Rui Wang
Yuxi DONG
Changjun Zhang
Bo Zhang
Dan Liu
Tongmin LIU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Hefei BOE Optoelectronics Technology Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Hefei BOE Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BOE Technology Group Co Ltd, Hefei BOE Optoelectronics Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Assigned to BOE TECHNOLOGY GROUP CO., LTD., HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD. reassignment BOE TECHNOLOGY GROUP CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DONG, Yuxi, HE, HONGCHAO, LIU, DAN, WANG, RUI, ZHAN, Jianghui, ZHANG, BO, ZHANG, CHANGJUN, ZHU, JIANG, LIU, TONGMIN
Publication of US20190033661A1 publication Critical patent/US20190033661A1/en
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members

Definitions

  • the present disclosure relates to but not limits to a liquid crystal display technique, particularly to a backlight module assembly, a structural adjustment method of the backlight module assembly and a display device.
  • the liquid crystal display may realize grayscale display by controlling liquid crystal rotation by using electric field, and furthermore, may realize colorful display by means of a color film.
  • the liquid crystal display has excellent performances, such as thin, light weight and lower power consumption, thereby has been used in computers, TVs and mobile terminal displayers.
  • the transmission-type capacitive touch technology includes G/G, which uses two substrate glasses including one that may achieve a touch panel function and the other that may achieve a protection function; G/FF, which may embed the touch panel function into two polyester films and may be protected by the glass substrates; OGS (One Glass Solution), which is one-piece touch way; Oncell, which may embed the touch screen between a color filter substrate and a polarizer; Incell, which may embed the touch panel function into a liquid crystal pixel, etc.
  • G/G uses two substrate glasses including one that may achieve a touch panel function and the other that may achieve a protection function
  • G/FF which may embed the touch panel function into two polyester films and may be protected by the glass substrates
  • OGS One Glass Solution
  • Oncell which may embed the touch screen between a color filter substrate and a polarizer
  • Incell which may embed the touch panel function into a liquid crystal pixel, etc.
  • a film structure (involving the parameters, such as length, width and height of the film) and a mating gap (including a distance between the film and the side walls of the plastic frame, and a distance between the film and the display unit) often need to be adjusted to meet the final product requirements.
  • both the film structure and the mating gap refer to a structural adjustment for the plastic frame, need to perform mold requiring, and even mold re-opening of the plastic frame, which will undoubtedly increase the product development cycle and cost.
  • liquid crystal display devices of the same type and size such as 11.6-inch or 13.3-inch, etc.
  • appearance of some liquid crystal display devices may be shared.
  • Size of the film, thickness of the display unit, a gap between the display unit and the film, and a gap between the film and the side walls of the plastic frame which need to perform mold repairing and even mold re-opening to cause the verification and size guide time longer, need to be adjusted in order to meet the thickness and optical parameters (to meet temperature and humidity verification requirements) of the newly developed backlight module assembly, and edges of the display unit are also prone to bright edges (bright areas) and edge shadows (dark areas) and other issues.
  • the Background portion contains the contents which are merely used for reinforcing understanding of the background technology of the present disclosure, and thus may include information that does not constitute the prior art as already known by an ordinary person skilled in the art.
  • the present disclosure provides a backlight module assembly to share the plastic frame, to save costs and schedules for mold-repairing and mold re-opening of the plastic frame, to facilitate for quick verification and adjustment of the backlight module assembly, so as to achieve a purpose of low cost and quick development of the products.
  • the present disclosure provides a backlight module assembly, which includes a plastic frame, a film and a adjustment sheet.
  • the plastic frame is presented in a box shape with an opening on the top, and has side walls and a bottom wall, and a space enclosed by the side walls and the bottom wall being a mounting groove.
  • the film is arranged on the bottom wall and received within the mounting groove.
  • the adjustment sheet is arranged on an inner side of the side wall of the mounting groove.
  • the adjustment sheet includes a vertical part and a horizontal part, a first set distance is provided between the vertical part and the film, and a second set distance is provided between an outer end face of the horizontal part and the film.
  • a limiting slot is provided in the inner side on a top of the side wall of the mounting groove, and the horizontal part is fit in the limiting slot.
  • the plastic frame is rectangular and has four side walls, there are three adjustment sheets which are correspondingly arranged on the three side walls of the plastic frame, and the adjustment sheet located in the middle abuts against the adjustment sheets located on the both sides.
  • the plastic frame is an unitary structure.
  • the adjustment sheet has absorbance areas with different absorbance.
  • the present disclosure further provides a display device, which includes the backlight module assembly according to any one of the above embodiments and a display unit which is arranged on a top end face of the adjustment sheet.
  • the present disclosure further provides a structural adjustment method for a backlight module assembly.
  • the backlight module assembly includes an plastic frame, which is presented in a box shape with an opening on its top, having side walls and a bottom wall, and a space enclosed by the side walls and the bottom wall being a mounting groove; a film, which is arranged on the bottom wall and received within the mounting groove; and a adjustment sheet, which is arranged on an inner side of the side wall of the mounting groove, the adjustment sheet including a vertical part and a horizontal part, a first set distance being provided between the vertical part and the film, and a second set distance being provided between an outer end face of the horizontal part and the film, the structural adjustment method for the backlight module assembly is adaptive to size adjustment of the film, adjustment of the second set distance, size adjustment of a display unit and/or adjustment of the first set distance by changing size of the adjustment sheet.
  • bright areas and dark areas at an edge of the display unit are adjusted by changing absorbance of the absorbance areas on the vertical part of the adjustment sheet.
  • the present disclosure provides a backlight module assembly.
  • the adjustment sheet is mounted at the side wall of the plastic frame. Adjustment for width of the adjustment sheet may change size of the mounting groove to adapt to size variation of the film, so as to avoid repairing a mold or re-opening a mold to share the plastic frame, such that the backlight module assembly may realize a rapid verification assembly and perform a fast temperature and humidity verification.
  • the backlight module assembly is manufactured to be a display device to adapt to the size adjustment of the display unit by changing the height and width of the adjustment sheet, such that the size-changed backlight module assembly may be quickly guided into assembling and realize the temperature and humidity verification of the backlight module assembly.
  • adjustment for size of the adjustment sheet may share the plastic frame to some extent without mold-repairing and mold re-opening, to reduce produce development cycle and cost effectively.
  • colors of the various absorbance areas of the adjustment sheet may be set correspondingly to increase absorption or reflection of light on the sides, to solve the problems of the bright and dark areas at the edges of the display unit, such that the brightness at the edges is consistent with the brightness at the center of the display unit.
  • FIG. 1 is a sectional schematic view of a backlight module assembly according to one embodiment of the present disclosure
  • FIG. 2 is a top view of the backlight module assembly as shown in FIG. 1 ;
  • FIG. 3 is a sectional schematic view of an plastic frame of the backlight module assembly in FIG. 1 ;
  • FIG. 4 is a sectional schematic view of a display device according to another embodiment of the present disclosure.
  • 1 plastic frame; 11 . mounting groove; 12 . limiting slot; 2 . film; 3 . adjustment sheet; 31 . vertical part; 32 . horizontal part; 4 . display unit.
  • the present disclosure provides a backlight module assembly, as shown in FIG. 1 , including an plastic frame 1 , a film 2 and a adjustment sheet 3 .
  • the plastic frame 1 is presented at a box shape, with an opening at its top, and has side walls and a bottom wall. A space enclosed by the side walls and the bottom side is a mounting groove. As shown in FIG. 2 , in this embodiment, the plastic frame 1 is rectangular and has four side walls 13 and one bottom wall 14 .
  • the film 2 is arranged on the bottom wall 14 , and received in the mounting groove 11 .
  • the adjustment sheet 3 is located within the mounting groove 11 and arranged at the side walls of the mounting groove 11 .
  • the adjustment sheet 3 is mounted at the side walls of the plastic frame 1 . Adjustment for width of the adjustment sheet 3 may change size of the mounting groove 11 to adapt to size variation of the film 2 , so as to avoid repairing a mold or re-opening a mold to share the plastic frame 1 , such that the backlight module assembly may realize a rapid verification assembly and perform a fast temperature and humidity verification.
  • the adjustment sheet 3 includes vertical parts 3 and horizontal parts 32 , wherein a first set distance L 1 is presented between the vertical part 31 and the film 2 , and a second set distance L 2 is presented between an outer end face of the horizontal part 32 and the film 2 .
  • a first set distance L 1 is presented between the vertical part 31 and the film 2
  • a second set distance L 2 is presented between an outer end face of the horizontal part 32 and the film 2 .
  • the present disclosure provides a backlight module assembly, which may adapt to size adjustment of the film 2 , adjustment of the second set distance L 2 and/or adjustment of the first set distance L 1 by changing height or width of the adjustment sheet 3 .
  • the backlight module assembly is manufactured to be a display device to adapt to the size adjustment of the display unit 4 by changing the height and width of the adjustment sheet 3 , such that the size-changed backlight module assembly may be quickly guided into assembling and realize the temperature and humidity verification of the backlight module assembly.
  • adjustment for size of the adjustment sheet 3 may share the plastic frame 1 to some extent without mold-repairing and opening a new mold, to reduce produce development cycle and cost effectively.
  • limiting slots 12 are provided in the inner sides of the top of the three side walls 13 of the plastic frame 1 , respectively.
  • the vertical part 31 are located within the mounting groove 11 , preferably, abuts against the bottom wall of the mounting groove 11 .
  • the horizontal part 32 coincides with the limiting slot 12 in shape, fits into the limiting slot 12 , preferably, abuts against the bottom wall of the limiting slot 12 .
  • the adjustment sheet 3 also may be presented in an elongated shape, also may achieve the object of the present application but not deviate from design concept of the present disclosure, will be omitted herein, all of which should be within the scope of the present application.
  • the plastic frame 1 is rectangular and has four side walls 13 .
  • the mounting groove 11 defined by four side walls 13 and one bottom wall is a rectangular slot.
  • the three adjustment sheets 3 are correspondingly provided on the three of the four side walls 13 of the plastic frame 1 , which has three side walls of the limiting slot 12 , and the adjustment sheet 3 in the middle abuts against the adjustment sheets 3 on both sides.
  • a light source may be arranged on the side walls of the mounting groove 11 without providing the adjustment sheets 3 , and no limiting slot 13 are on the side wall 13 .
  • the plastic frame 1 is a one-piece structure.
  • colors of the various absorbance areas of the adjustment sheet 3 may be set correspondingly to increase absorption or reflection of light on the sides, to solve the problems of the bright and dark areas at the edges of the display unit 4 , such that the brightness at the edges is consistent with the brightness at the center of the display unit 4 .
  • the present disclosure provides a display device, as shown in FIG. 4 , including the backlight module assembly according to any one of the above embodiments.
  • the display device has all advantages of the backlight module assembly according to any one of the above embodiments, herein omitted.
  • the display device further includes a display unit 4 .
  • the display unit 4 is located at an opening of the mounting groove 11 , and abuts against the outer end face of the adjustment sheet 3 .
  • the display device may adapt to the size adjustment of the display unit 4 by changing height or width of the adjustment sheet 3 , under a circumstance of satisfying a request for temperature and humidity of the backlight module assembly, the size-changed backlight module assembly may be quickly guided into assembling without mold-repairing and mole re-opening of the plastic frame, to reduce the produce development cycle and cost effectively.
  • a structural adjustment method of the backlight module assembly according to the present disclosure (not shown) is adapted to the size adjustment of the film, the adjustment of the second set distance and the size adjustment of the display unit and/or the adjustment of the first set distance by changing the size of the adjustment sheet.
  • it is adapted to thickness adjustment of the film, adjustment of the second set distance, and/or thickness adjustment of the display unit by changing thickness of the horizontal parts of the adjustment sheet. It is adapted to length adjustment of the film, width adjustment of the film, adjustment of the first set distance, length adjustment of the display unit, and/or width adjustment of the display unit by changing width of the vertical parts of the adjustment sheet.
  • the thickness of the film or the thickness of the display unit may be realized by adjusting the thickness of the horizontal parts of the adjustment sheet within design safety range of the second set distance.
  • the thickness of the existing backlight module assembly needs to be reduced by 0.03 mm, but the existing optical design has already satisfied for the requirement, it may be measured that the size of the second set distance may be reduced by 0.03 mm (the changed second set distance may still meet the optical design requirements), that is, the optical design of the backlight module assembly structure has not been altered by reducing the thickness of the horizontal part of the adjustment sheet by 0.03 mm.
  • the width of the vertical parts of the adjustment sheet may be adjusted within the design safety range of the first set distance.
  • the width F 2 of the existing film is reduced by 0.03 mm, it may be determined that the size of the existing first set distance has already satisfy for the design, the optical design of the backlight module assembly structure has not been altered by increasing the width of the vertical parts of the corresponding adjustment sheet by 0.03 mm.
  • the first set distance and the second set distance may be adjusted correspondingly by adjusting the thickness of the horizontal parts and the width of the vertical parts of the adjustment sheet, and the thickness of the horizontal parts and the width of the vertical parts of the adjustment sheet according to size variation of the film, in order to verify the optical design of the backlight module assembly quickly.
  • the bright and dark areas at the edges of the display unit may be adjusted by changing absorbance of the absorbance areas on the vertical parts of the adjustment sheet, such that the brightness at the edge is consistent with the brightness at the center of the display unit.
  • the brightness at the edges of the display unit is too high, as a result, bright spots appear at the edges of a display screen, the areas of the vertical parts of the adjustment sheet corresponding to the bright spots on the surface of the film are displayed in blank color, light absorption between the adjustment sheet at the bright spot and the edges of the display unit may be increased, light leakage may be reduced, and the edge brightness of the display unit may be reduced to overcome problem of bright edges.
  • the backlight module assembly has the adjustment sheets mounted at the side walls of the plastic frame, and may change the size of the plastic frame by adjusting the width of the adjustment sheet and adapt to the size variation of the film, to avoid mold repairing or mold re-opening of the plastic frame, so as to share the plastic frame, such that the backlight module assembly may realize quick verification and assembling, and perform a fast verification for the temperature and humidity.
  • the backlight module assembly may adapt to size adjustment of the film, adjustment of the second set distance and/or adjustment of the first set distance by changing height or width of the adjustment sheet.
  • the backlight module assembly is manufactured to be a display device to adapt to the size adjustment of the display unit by changing the height and width of the adjustment sheet, such that the size-changed backlight module assembly may be quickly guided into assembling and realize the temperature and humidity verification of the backlight module assembly.
  • adjustment for size of the adjustment sheet may share the plastic frame to some extent without mold-repairing and mold re-opening, to reduce produce development cycle and cost effectively.
  • colors of the various absorbance areas of the adjustment sheet may be set correspondingly to increase absorption or reflection of light on the sides, to solve the problems of the bright and dark areas at the edges of the display unit, such that the brightness at the edges is consistent with the brightness at the center of the display unit.
  • connection may be a fixed connection, and also a removable connection or an integral connection, and may be a direct connection, and also indirect connection through an intermediary connection.
  • connection may be a fixed connection, and also a removable connection or an integral connection, and may be a direct connection, and also indirect connection through an intermediary connection.
  • any reference in this specification to “one embodiment” “some embodiments” and “specific example” etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment is included in at least one embodiment of the example.
  • the appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment or example. Further, when a particular feature, structure, material or characteristic is described in connection with any one or more embodiments or examples.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
US15/758,731 2017-02-28 2017-09-09 Backlight module assembly, structural adjustment method thereof and display device Abandoned US20190033661A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201710113620.X 2017-02-28
CN201710113620.XA CN107065300B (zh) 2017-02-28 2017-02-28 一种背光模组及其结构调整方法、显示设备
PCT/CN2017/101148 WO2018157574A1 (zh) 2017-02-28 2017-09-09 背光模组及其结构调整方法、显示设备

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CN107065300B (zh) 2017-02-28 2019-12-31 合肥京东方光电科技有限公司 一种背光模组及其结构调整方法、显示设备
CN114527601B (zh) * 2022-03-03 2023-08-22 武汉华星光电技术有限公司 背光模组和显示面板

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WO2018157574A1 (zh) 2018-09-07
CN107065300A (zh) 2017-08-18
CN107065300B (zh) 2019-12-31
US11126036B2 (en) 2021-09-21
US20200218119A1 (en) 2020-07-09

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