US20090288296A1 - Method for making backlight module frame - Google Patents

Method for making backlight module frame Download PDF

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Publication number
US20090288296A1
US20090288296A1 US12/177,121 US17712108A US2009288296A1 US 20090288296 A1 US20090288296 A1 US 20090288296A1 US 17712108 A US17712108 A US 17712108A US 2009288296 A1 US2009288296 A1 US 2009288296A1
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United States
Prior art keywords
backlight module
metallic
frames
metallic strips
module frame
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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
US12/177,121
Inventor
Yong Yang
Chun Peng
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.)
Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
Original Assignee
Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Filing date
Publication date
Application filed by Hongfujin Precision Industry Shenzhen Co Ltd, Hon Hai Precision Industry Co Ltd filed Critical Hongfujin Precision Industry Shenzhen Co Ltd
Assigned to HONG FU JIN PRECISION INDUSTRY (SHENZHEN) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD. reassignment HONG FU JIN PRECISION INDUSTRY (SHENZHEN) CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PENG, Chun, YANG, YONG
Publication of US20090288296A1 publication Critical patent/US20090288296A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/083—Devices involving movement of the workpiece in at least one axial direction
    • B23K26/0838—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt
    • B23K26/0846—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt for moving elongated workpieces longitudinally, e.g. wire or strip material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/60—Preliminary treatment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49616—Structural member making

Definitions

  • the present invention relates to a method for making a backlight module frame.
  • the method is particularly useful in the production of backlight module for a liquid crystal display (LCD) device.
  • LCD liquid crystal display
  • a typical LCD device comprises an LCD panel, and a backlight module mounted under the LCD panel for supplying light thereto.
  • the backlight module mainly comprises a light source, a light guide plate, and a frame.
  • the light guide plate is made of a transparent acrylic plastic, and is used for guiding light received from the light source to uniformly illuminate the liquid crystal display panel.
  • the frame is usually made of metal, and used for providing a high mechanical strength to protect the light guide plate and the light source.
  • the frame also provides an electromagnetic shield capability.
  • a typical method of making a backlight module frame includes: providing a number of individual starting components that are cut to proper length; pressing the starting components to form a unit corresponding to the subsequent unit form of the frame; assembling the units to form a semi-manufactured frame corresponding to the subsequent form of the frame; and welding the semi-manufactured frame to manufacture a backlight module frame.
  • this method of making a backlight module frame may lower the cost of manufacture, positioning the starting components or welding the semi-manufactured frame are mainly manually performed. Therefore, the processes of making the backlight module frame consume relatively more time, which is problematic for mass-producing the backlight module frames.
  • the present invention provides a method for making a backlight module frame.
  • An exemplary embodiment of the method includes: providing a pair of spaced metallic strips, and a plurality of elongated metallic sheets; continuously welding the elongated metallic sheets to connect with the pair of the spaced metallic strips one by one to form a plurality of connected semi-manufactured frames corresponding to the subsequent backlight module frame; and pressing the connected semi-manufactured frames one by one to form the backlight module frames continuously.
  • FIG. 1 is a flowchart of a method for making a backlight module frame according to an exemplary embodiment.
  • FIG. 2 is a schematic, isometric view of a plurality of elongated metallic sheets welded to a pair of spaced metallic strips.
  • FIG. 3 is a schematic, isometric view of a plurality of connected semi-manufactured frames provided for being punched.
  • FIG. 1 is a flow chart of a method for making backlight module frames. Referring to FIGS. 1 through 3 together, the method includes performing the following:
  • step 100 providing a pair of coiled metallic strips 20 , 20 ′, and a plurality of elongated metallic sheets 30 ;
  • step 200 continuously welding the elongated metallic sheets 30 to connect with the pair of spaced coils of metallic strips 20 , 20 ′ one by one to form a plurality of connected semi-manufactured frames 40 corresponding to the requirements of the subsequent backlight module frame; each longitudinal end of the metallic sheet is welded with one metallic strip;
  • step 300 pressing the connected semi-manufactured frames 40 one by one to form a plurality of backlight module frames continuously.
  • the widths of the plurality of elongated metallic sheets 30 are the same.
  • the elongated metallic sheets 30 may be produced with single pieces punched from a metal sheet.
  • the width of each of the elongated metallic sheets 30 is configured to be twice as wide as that of the subsequent backlight module frame.
  • the width of each of the pair of spaced coiled metallic strips 20 , 20 ′ equals to that of the subsequent backlight module frame.
  • each semi-manufactured frame 40 and widths of the coiled metallic strips 20 , 20 ′ can be configured to be slightly larger than those of the subsequent backlight module frame, because the subsequent pressing step may consume a little of the lengths and widths of the coiled metallic strips 20 , 20 ′.
  • lengths and widths of the elongated metallic sheets 30 are configured to be slightly larger than twice of that of the subsequent backlight module frame.
  • the pair of coiled metallic strips 20 , 20 ′ is spaced apart at a predetermined distance according to the length of the elongated metallic sheets 30 .
  • the pair of spaced coiled metallic strips 20 , 20 ′ is fed to a welding apparatus (not shown) in an automatic feeding mechanism.
  • Two ends of each of the elongated metallic sheets 30 are arranged to be in contact with the coiled metallic strips 20 , 20 ′ respectively at welding portions 25 , and are welded together by the welding apparatus.
  • the elongated metallic sheets 30 are continuously welded with the pair of coiled metallic strips 20 , 20 ′, thereby a ladder-shaped connected multiple semi-manufactured frames 40 are formed.
  • Distances between the adjacent elongated metallic sheets 30 are constant. Alternatively, the distance between adjacent elongated metallic sheets 30 can be different for making different sizes of the backlight module frames.
  • the welding apparatus is selected from a group consisting of a CO 2 high performance laser and an Nd-YAG laser.
  • the wielding apparatus may have a control interface that allows external programming and setting the laser power cycles, pulse programs, pulse frequency, and laser power.
  • an analog laser power control that is controlled directly by a computerized numerical control, one has the ability to control the laser power's path-dependency, rate-dependency, time-dependency or laser power levels.
  • the size of the semi-manufactured frame may not be affected a lot due to the laser welding process.
  • the semi-manufactured frame will have a smooth surface without any protruding weld seams produced thereon due to advantages utilizing the laser welding process.
  • the connected semi-manufactured frames has smooth surfaces and enough mechanical strength to bear with a subsequent pressing process.
  • the ends of the elongated metallic sheet 30 and the welding portions 25 of the metallic sheets 20 , 20 ′ should be polished thoroughly. Polishing allows the elongated metallic sheet 30 and the coiled metallic strips 20 , 20 ′ to connect tightly and increase the laser welding effectiveness.
  • the ladder-shaped semi-manufactured frames 40 can be coiled together, and provided for to the subsequent pressing process.
  • the semi-manufactured frames 40 may be pressed by a pressing machine to form a plurality of backlight module frames according to a backlight frame design in an automatic feeding mechanism.
  • the metallic strips 20 , 20 ′ without being coiled can also be used in the present method.
  • the backlight module frames can be mass-produced, because each step of the method can be achieved in an automatic procedure respectively.
  • This method of making backlight module frames may lower the cost of manufacture.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Planar Illumination Modules (AREA)

Abstract

An exemplary method for making a backlight module frame includes: providing a pair of metallic strips that are spaced apart, and a plurality of elongated metallic sheets; continuously welding the elongated metallic sheets to connect with the pair of the metallic strips one by one to form a plurality of connected semi-manufactured frames corresponding to the subsequent backlight module frame; and pressing the connected semi-manufactured frames one by one to form a plurality of backlight module frames continuously. It is convenient for the backlight module frames to be mass-produced.

Description

    BACKGROUND
  • 1. Field of the Invention
  • The present invention relates to a method for making a backlight module frame. The method is particularly useful in the production of backlight module for a liquid crystal display (LCD) device.
  • 2. Description of the Related Art
  • A typical LCD device comprises an LCD panel, and a backlight module mounted under the LCD panel for supplying light thereto. The backlight module mainly comprises a light source, a light guide plate, and a frame. The light guide plate is made of a transparent acrylic plastic, and is used for guiding light received from the light source to uniformly illuminate the liquid crystal display panel. The frame is usually made of metal, and used for providing a high mechanical strength to protect the light guide plate and the light source. The frame also provides an electromagnetic shield capability.
  • A typical method of making a backlight module frame includes: providing a number of individual starting components that are cut to proper length; pressing the starting components to form a unit corresponding to the subsequent unit form of the frame; assembling the units to form a semi-manufactured frame corresponding to the subsequent form of the frame; and welding the semi-manufactured frame to manufacture a backlight module frame. Although, this method of making a backlight module frame may lower the cost of manufacture, positioning the starting components or welding the semi-manufactured frame are mainly manually performed. Therefore, the processes of making the backlight module frame consume relatively more time, which is problematic for mass-producing the backlight module frames.
  • What is needed, therefore, is a method for making backlight module frames that overcomes the above mentioned disadvantages.
    • SUMMARY
  • The present invention provides a method for making a backlight module frame. An exemplary embodiment of the method includes: providing a pair of spaced metallic strips, and a plurality of elongated metallic sheets; continuously welding the elongated metallic sheets to connect with the pair of the spaced metallic strips one by one to form a plurality of connected semi-manufactured frames corresponding to the subsequent backlight module frame; and pressing the connected semi-manufactured frames one by one to form the backlight module frames continuously.
  • Other advantages and novel features will become more apparent from the following detailed description of preferred embodiments when taken in conjunction with the accompanying drawings.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • Many aspects of the method for making a backlight module frame can be better understood with reference to the following drawings. The components in the drawings are not necessarily to scale, the emphasis instead being placed upon clearly illustrating the principles of the present method. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
  • FIG. 1 is a flowchart of a method for making a backlight module frame according to an exemplary embodiment.
  • FIG. 2 is a schematic, isometric view of a plurality of elongated metallic sheets welded to a pair of spaced metallic strips.
  • FIG. 3 is a schematic, isometric view of a plurality of connected semi-manufactured frames provided for being punched.
    •  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • FIG. 1 is a flow chart of a method for making backlight module frames. Referring to FIGS. 1 through 3 together, the method includes performing the following:
  • step 100: providing a pair of coiled metallic strips 20, 20′, and a plurality of elongated metallic sheets 30;
  • step 200: continuously welding the elongated metallic sheets 30 to connect with the pair of spaced coils of metallic strips 20, 20′ one by one to form a plurality of connected semi-manufactured frames 40 corresponding to the requirements of the subsequent backlight module frame; each longitudinal end of the metallic sheet is welded with one metallic strip;
  • step 300: pressing the connected semi-manufactured frames 40 one by one to form a plurality of backlight module frames continuously.
  • In the step 100, the widths of the plurality of elongated metallic sheets 30 are the same. The elongated metallic sheets 30 may be produced with single pieces punched from a metal sheet. In this embodiment, the width of each of the elongated metallic sheets 30 is configured to be twice as wide as that of the subsequent backlight module frame. The width of each of the pair of spaced coiled metallic strips 20, 20′ equals to that of the subsequent backlight module frame. Alternatively, the lengths of each semi-manufactured frame 40 and widths of the coiled metallic strips 20, 20′ can be configured to be slightly larger than those of the subsequent backlight module frame, because the subsequent pressing step may consume a little of the lengths and widths of the coiled metallic strips 20, 20′. Likewise, lengths and widths of the elongated metallic sheets 30 are configured to be slightly larger than twice of that of the subsequent backlight module frame.
  • In the step 200, the pair of coiled metallic strips 20, 20′ is spaced apart at a predetermined distance according to the length of the elongated metallic sheets 30. The pair of spaced coiled metallic strips 20, 20′ is fed to a welding apparatus (not shown) in an automatic feeding mechanism. Two ends of each of the elongated metallic sheets 30 are arranged to be in contact with the coiled metallic strips 20, 20′ respectively at welding portions 25, and are welded together by the welding apparatus. The elongated metallic sheets 30 are continuously welded with the pair of coiled metallic strips 20, 20′, thereby a ladder-shaped connected multiple semi-manufactured frames 40 are formed. Distances between the adjacent elongated metallic sheets 30 are constant. Alternatively, the distance between adjacent elongated metallic sheets 30 can be different for making different sizes of the backlight module frames.
  • The welding apparatus is selected from a group consisting of a CO2 high performance laser and an Nd-YAG laser. The wielding apparatus may have a control interface that allows external programming and setting the laser power cycles, pulse programs, pulse frequency, and laser power. In an analog laser power control that is controlled directly by a computerized numerical control, one has the ability to control the laser power's path-dependency, rate-dependency, time-dependency or laser power levels. When utilizing the laser beam to weld the starting components together, the heat areas adjacent to the edges of the starting components are small, thus, resulting individual weld seams produced by the laser beam are significantly small. Furthermore, the size of the semi-manufactured frame may not be affected a lot due to the laser welding process. In addition, the semi-manufactured frame will have a smooth surface without any protruding weld seams produced thereon due to advantages utilizing the laser welding process.
  • The connected semi-manufactured frames has smooth surfaces and enough mechanical strength to bear with a subsequent pressing process. Before welding, the ends of the elongated metallic sheet 30 and the welding portions 25 of the metallic sheets 20, 20′ should be polished thoroughly. Polishing allows the elongated metallic sheet 30 and the coiled metallic strips 20, 20′ to connect tightly and increase the laser welding effectiveness.
  • After the step 200, referring to FIG. 3, the ladder-shaped semi-manufactured frames 40 can be coiled together, and provided for to the subsequent pressing process.
  • In step 300, the semi-manufactured frames 40 may be pressed by a pressing machine to form a plurality of backlight module frames according to a backlight frame design in an automatic feeding mechanism.
  • It should be pointed out that, the metallic strips 20, 20′ without being coiled can also be used in the present method.
  • In this method, the backlight module frames can be mass-produced, because each step of the method can be achieved in an automatic procedure respectively. This method of making backlight module frames may lower the cost of manufacture.
  • Finally, while the present invention has been described with reference to particular embodiments, the description is illustrative of the invention and is not to be construed as limiting the invention. Therefore, various modifications can be made to the embodiments by those skilled in the art without departing from the true spirit and scope of the invention as defined by the appended claims.

Claims (13)

1. A method for making backlight module frames continuously, the method comprising:
providing a pair of metallic strips that are spaced apart, and a plurality of elongated metallic sheets;
continuously welding the elongated metallic sheets to connect with the pair of the metallic strips one by one to form a plurality of connected semi-manufactured frames corresponding to the subsequent backlight module frame, the longitudinal ends of each metallic sheet being welded with one of the metallic strips respectively; and
pressing the connected semi-manufactured frames one by one to form a plurality of backlight module frames continuously.
2. The method of claim 1, wherein the pair of metallic strips is fed to a welding apparatus in an automatic feeding mechanism for welding with the elongated metallic sheets.
3. The method of in claim 1, wherein each of the metallic strips is coiled.
4. The method of claim 1, wherein the width of each of the elongated metallic sheets is configured to be larger than or equal to twice as wide as that of the backlight module frame.
5. The method of claim 1, wherein the width of each of the metallic strips is configured to be larger than or equal to that of the backlight module frame.
6. The method of claim 1, wherein ends of the elongated metallic sheets and the metallic strips are polished before the welding process.
7. The method of claim 1, wherein the welding step uses a laser selected from the group consisting of a CO2 gas laser and an Nd: YAG solid-state laser.
8. A method for making backlight module frames continuously, the method comprising:
providing a pair of metallic strips which are spaced apart in an automatic feeding mechanism;
continuously welding a plurality of elongated metallic sheets to connect with the pair of the spaced metallic strips one by one to form a plurality of connected semi-manufactured frames corresponding to the subsequent backlight module frame, the longitudinal ends of each metallic sheet being welded with one of the metallic strips respectively, wherein distances between the adjacent elongated metallic sheets are constant;
feeding the connected semi-manufactured frames to a punching machine in an automatic feeding mechanism; and
pressing the connected semi-manufactured frames by the punching device one by one to form a plurality of backlight module frames continuously.
9. The method of in claim 8, wherein each of the metallic strips is coiled.
10. The method of claim 8, wherein the width of each of the elongated metallic sheets is configured to be larger than or equal to twice as wide as that of the backlight module frame.
11. The method of claim 8, wherein the width of each of the metallic strips is configured to be larger than or equal to that of the backlight module frame.
12. The method of claim 8, wherein ends of the elongated metallic sheets and the metallic strips are polished before the welding process.
13. The method of claim 8, wherein the welding step uses a laser selected from the group consisting of a CO2 gas laser and an Nd: YAG solid-state laser.
US12/177,121 2008-05-26 2008-07-21 Method for making backlight module frame Abandoned US20090288296A1 (en)

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Application Number Priority Date Filing Date Title
CN200810301786.5 2008-05-26
CN2008103017865A CN101590584B (en) 2008-05-26 2008-05-26 Preparation method for backlight module frame

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102588907A (en) * 2012-02-29 2012-07-18 华映视讯（吴江）有限公司 Back plate manufacturing method

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US3497947A (en) * 1967-08-18 1970-03-03 Frank J Ardezzone Miniature circuit connection and packaging techniques
US3516147A (en) * 1967-07-17 1970-06-23 A P Seedorff & Co Inc Method of fabrication of metallic frames
US3792522A (en) * 1972-12-04 1974-02-19 Mercury Aircraft Inc Frame-making method
US3942064A (en) * 1974-11-14 1976-03-02 Westinghouse Electric Corporation Reinforcing ring structure for a shadow mask
US4293363A (en) * 1978-06-08 1981-10-06 Nissan Motor Company Limited Panel assembling method
US5239157A (en) * 1990-10-31 1993-08-24 The Furukawa Electric Co., Ltd. Superconducting accelerating tube and a method for manufacturing the same
US5948287A (en) * 1996-08-05 1999-09-07 Samsung Display Devices Co., Ltd. Process for the production of mask frames
US7178968B2 (en) * 2003-09-10 2007-02-20 Sharp Kabushiki Kaisha Surface light source device and liquid crystal display device
US20090165282A1 (en) * 2007-12-28 2009-07-02 Shu-Shan Tseng Method of manufacturing a bezel for LCD/LED panel

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CN2822116Y (en) * 2005-09-01 2006-09-27 锦明实业股份有限公司 Frame structure of display panel
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TWM324588U (en) * 2007-06-27 2008-01-01 Jochu Technology Co Ltd Punching equipment with function of joint punching component
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3516147A (en) * 1967-07-17 1970-06-23 A P Seedorff & Co Inc Method of fabrication of metallic frames
US3497947A (en) * 1967-08-18 1970-03-03 Frank J Ardezzone Miniature circuit connection and packaging techniques
US3792522A (en) * 1972-12-04 1974-02-19 Mercury Aircraft Inc Frame-making method
US3942064A (en) * 1974-11-14 1976-03-02 Westinghouse Electric Corporation Reinforcing ring structure for a shadow mask
US4293363A (en) * 1978-06-08 1981-10-06 Nissan Motor Company Limited Panel assembling method
US5239157A (en) * 1990-10-31 1993-08-24 The Furukawa Electric Co., Ltd. Superconducting accelerating tube and a method for manufacturing the same
US5948287A (en) * 1996-08-05 1999-09-07 Samsung Display Devices Co., Ltd. Process for the production of mask frames
US7178968B2 (en) * 2003-09-10 2007-02-20 Sharp Kabushiki Kaisha Surface light source device and liquid crystal display device
US20090165282A1 (en) * 2007-12-28 2009-07-02 Shu-Shan Tseng Method of manufacturing a bezel for LCD/LED panel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102588907A (en) * 2012-02-29 2012-07-18 华映视讯（吴江）有限公司 Back plate manufacturing method

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CN101590584B (en) 2013-02-13

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Owner name: HONG FU JIN PRECISION INDUSTRY (SHENZHEN) CO., LTD

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