WO1999016020A1 - Dispositif electronique portatif - Google Patents
Dispositif electronique portatif Download PDFInfo
- Publication number
- WO1999016020A1 WO1999016020A1 PCT/JP1998/004270 JP9804270W WO9916020A1 WO 1999016020 A1 WO1999016020 A1 WO 1999016020A1 JP 9804270 W JP9804270 W JP 9804270W WO 9916020 A1 WO9916020 A1 WO 9916020A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- circuit board
- portable electronic
- electronic device
- battery
- liquid crystal
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1626—Constructional details or arrangements for portable computers with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1635—Details related to the integration of battery packs and other power supplies such as fuel cells or integrated AC adapter
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1656—Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/301—Assembling printed circuits with electric components, e.g. with resistor by means of a mounting structure
Definitions
- the present invention relates to a portable electronic device having an information storage function inside the main body and capable of displaying necessary information on a main body display surface by connecting to an external terminal such as a personal computer.
- a connector 102 connected to an external data input device 101 such as a personal computer is attached to a side of the case 106.
- a display unit 107 is provided on the surface of the case 106, and an operation unit 110 including an operation key 108 such as an index, a page, and a mode and a cursor operation key 109 is provided. It has 0.
- storage consisting of a central processing unit (CPU) 103, random access memory (RAM) 104, read-only memory (ROM) 105, etc.
- ROM read-only memory
- display device such as a liquid crystal cell.
- the data is input / output. It is stored in the storage unit via the control unit 111.
- the data stored in the storage unit is processed based on an operation signal from the operation unit 110, and displayed on the display unit 107 via the input / output control unit 111.
- this portable electronic device 100 is larger in size than a credit card, and is a standard PCMCIA (Personal Computer Memory Card International Association) type PC card. Has not become.
- PCMCIA Personal Computer Memory Card International Association
- the PC card 200 has an appearance as shown in FIG. 17 and can receive data from the personal computer by being combined with a personal computer with a PC card slot.
- the PC card 200 shown in Fig. 17 is already commercially available from IBM under the product name "Chip Card J" and has a limited credit card size of the main body 201. Not shown in the display space, display 202, keyboard 203, and main unit 201. PCMCIA type connector, CPU, etc., which is a computer computing function It uses two button batteries and has a separate rechargeable backup battery that can protect data even when the battery for operation is replaced.
- the keyboard occupies a large part of the limited main body area, and the display area is reduced accordingly.
- the amount of information that can be checked at a time becomes extremely small.
- the portable electronic device 100 will be described with reference to the partial cross-sectional view of FIG.
- the portable electronic device 100 includes a circuit board 101 and an electric component 102 such as an Ic chip attached to the circuit board 101.
- the circuit board 101 and the electric component 102 are disposed between the upper and lower exterior metal plates 107 and are sealed with a sealing layer 103.
- a plurality of (for example, four) holes 104 are formed from the front and back surfaces to the circuit board 101.
- a ground electrode 105 is provided on the circuit board 101 at a position corresponding to the hole 104. Therefore, with the upper exterior metal plate 107 removed, the ground electrode 105 communicates with the outside through the hole 104.
- a coil-type metal spring 106 is inserted into the hole 104 provided in the sealing layer 103.
- a connector 109 is connected to one end of the circuit board 101 via a pair of metal pieces 108.
- This metal piece 108 is sealed with a sealing layer 103.
- the thickness of the connector 109 is set to be the same as the thickness of the sealing layer 103.
- An object of the present invention is to provide a PCMCIA-standard portable electronic device in which the area occupied by the display is increased and the amount of information that can be displayed on one screen is expanded within the limited space of the credit card size. It is to provide.
- a portable electronic device according to the present invention is provided along an edge of an upper cover having a display window, a lower cover, and the opposing upper and lower covers.
- a case body composed of a frame body defining an internal space, and internal components such as a liquid crystal cell, a circuit board, and a battery holder housed in the internal space of the case body.
- the liquid crystal cell is disposed at a position corresponding to the display window on the top cover of the case body, and the circuit board has a number of signal terminals connectable to connectors provided in external devices.
- a battery holder is disposed at one end of the circuit board. The battery holder is disposed at one end of the circuit board.
- the processing function can be expanded by mounting a large integrated circuit in a limited space, and the ratio of the display area to the surface area of the device body is reduced. Can be larger.
- FIG. 1 is a top view of a portable electronic device according to an embodiment of the present invention.
- Fig. 2 is a view of the portable electronic device of Fig. 1 viewed from the back.
- FIG. 3 is a side view of the portable electronic device of FIG.
- FIG. 4 is an exploded view of the portable electronic device of Figure 1 ⁇
- FIG. 5 is a plan view showing a state where the liquid crystal cell positioned on the upper cover is connected to the circuit board via the FPC.
- FIG. 6 is a partially enlarged view showing a state where the liquid crystal cell of FIG. 5 is positioned on a frame.
- Fig. 7 shows a state in which the circuit board is stacked on the liquid crystal cell in Fig. 5 and a battery holder is provided, that is, when the portable electronic device in Fig. 1 has its lower cover removed and the inside is seen from there. It is a figure showing a state.
- FIG. 8A is a partially enlarged view showing a state before the caulking pin indicated by arrow A in FIG. 7 is caulked.
- Fig. 8B is a partially enlarged view showing the state after crimping the caulking pin of Fig. 8A.
- FIG. 8C is a cross-sectional view taken along a line AA of FIG. 8B.
- FIG. 9 is a sectional view taken along line BB of FIG.
- FIG. 10 is a cross-sectional view taken along the line CC of FIG.
- FIG. 11 is a view of the spring member positioned and fixed to the circuit board of FIG. 7 when viewed from a direction D shown in FIG.
- FIG. 12 is a bottom view of the leaf spring member of FIG.
- FIG. 13 is a view for explaining a state in which the panel panel member of FIG. 11 is positioned and fixed to a circuit board.
- FIG. 14 is a partially enlarged view of a portion indicated by an arrow A in FIG. 2, and shows a positional relationship between the plate panel member in FIG. 11 and an operation through hole formed in the lower cover.
- Figure 15 is a perspective view showing the appearance of a conventional portable electronic device. It is.
- FIG. 16 is a block diagram showing a configuration of a control unit of the portable electronic device of FIG.
- FIG. 17 is a perspective view showing the appearance of another type of conventional portable electronic device.
- FIG. 18 is a partial cross-sectional view showing the internal structure of yet another type of conventional portable electronic device.
- the portable electronic device 1 is a credit-capable device compliant with “PC Card Standard J” standardized by PCMCIA.
- a rectangular display unit 4 is provided at the center of the front surface of the portable electronic device 1.
- the display section 4 is a liquid crystal cell 3 constituted by a liquid crystal display element.
- a plurality of, for example, five, operation input keys 5a, 5b, 5 c, 5 d and 5 e are arranged in a line at a predetermined interval. These five keys 5 a to 5 e constitute an operation member 5.
- key 5a is for page return
- key 5b is for page turning
- key 5c is for input
- Keys 5d and 5e are assigned to keys for moving the cursor.
- the portable electronic device 1 including the display unit 4 and various operation input keys 5a to 5e has various utilization forms such as a schedule table, a calendar, and an address book.
- a connector 7 conforming to the PMCIA standard is joined to a circuit board, which will be described later, at the left edge of the portable electronic device 1 as shown in FIG.
- the connector 7 has a large number of signal terminals and external power supply terminals that can be connected to connectors provided on an external device (not shown) such as a personal computer.
- the front surface of the portable electronic device 1 that is, the surface on which the display unit is provided, is composed of a metal upper force bar 8 a having a thickness of 0.15 mm, and the back surface thereof is It consists of a metal bottom cover 8b (see Fig. 2) with a thickness of 0.15 mm.
- the upper cover 8a has a stepped portion 20 for positioning the liquid crystal cell 3 at a peripheral portion thereof, and a display window 6 is formed at a central portion. I have.
- the lower cover 8b has a peripheral portion subjected to squeezing to enhance the strength of the lower cover 8b.
- Small holes 8f are formed at the four corners of the lower corner 8b to allow screws to pass through.
- squeeze the lower cover 8 b An operation through hole 8e for operating a third arm portion of a plate panel member, which will be described later, is formed in the vicinity of the step formed by the step.
- an internal space (a circuit board, a liquid crystal cell, and a battery holder to be described later) is provided.
- Space for storing internal components such as
- the frame 9 is made of plastic material, is articulated to an upper cover 8a, and is joined to the upper cover 8a. Note that this frame 9 is not joined to all four sides of the rectangular upper cover 8a, but the side where the connector 7 is arranged is removed as shown in FIG. Joined over three sides.
- screw holes 9a are formed in the frame body 9 at the four corners of the lower cover 8b corresponding to the small holes 8f for passing screws, as shown in Fig. 5. I have.
- Screws (not shown) are passed through the small holes 8f for screw passage at the four corners of the lower cover 8b, and the threaded ends are formed at the four corners of the frame 9 joined to the upper cover 8a.
- the upper cover 8a, the lower cover 8b, and the frame 9 are connected to each other when the screws 9a are engaged with each other, and the case body of the portable electronic device 1 is assembled.
- the liquid crystal cell 3, the circuit board 12, the battery holder 10, and other internal components are housed in this case body, and a portable electronic device is assembled. You.
- the internal components such as the liquid crystal cell 3, the circuit board 12 and the battery holder 10 will be described later in detail.
- a battery holder 10 (FIG. 7), which will be described later, is provided at a position corresponding to a position directly below the operation member 5 of the portable electronic device 1.
- This battery holder 10 accommodates two button-shaped batteries 25a and 25b, and allows the batteries 25a and 25b to be inserted and removed separately. are doing.
- FIG. 5 shows a state in which the liquid crystal cell 3 positioned on the upper cover 8 a is connected to the circuit board 12 via a flexible printed circuit (FPC) 11.
- FPC flexible printed circuit
- circuit board 12 shown in FIG. 5 is open to the liquid crystal cell 3 positioned at the upper cover 8a, the circuit board 12 is turned around the FPC 1 "I. When moved (inverted), the FPC 11 bends freely and the circuit board 12 is placed on top of the liquid crystal cell.
- a connector 7 is attached to a peripheral portion of the circuit board 12 adjacent to the peripheral portion to which the FPC 11 is bonded.
- the connector 7 sandwiches the periphery of the circuit board 12 with a number of signal terminals provided in two rows, and is connected to the circuit board 12 by soldering.
- the 9d moss is formed.
- the FPC 11 bends in a U-shape, Project sideways.
- the cross section has a concave structure as shown in FIG. Therefore, a part of the FPC bent in a U-shape is accommodated in the concave portion of the frame 9, and accordingly, the edge of the liquid crystal cell and the edge of the circuit board 12 are moved to the frame 9. Because they can be close to each other, the circuit board and the display unit can be enlarged. You.
- the battery holder 10 is arranged on the opposite side of the circuit board 12 from the connector 7 side.
- a caulking pin 9e (and a force shown in FIG. Align the force formed at the end of the battery holder 10 with the crimped portion of the circuit board 12 with the crimped pin 9 f), and then, as shown in FIG.
- thermally shrinking 9 e the battery holder 10 and the circuit board 12 can be simultaneously connected to the frame 9 (see FIG. 8C).
- the battery holder 10 is composed of a resin battery frame 10a for housing two button batteries 25a and 25b in parallel, and a battery frame 10a.
- the two lids 10b that open and close flexibly at the base of the batteries 25a and 25b, and the two battery contact springs 10c
- tips 1 O d of the two battery contact springs 10 c on the negative side are connected to terminals 12 a on the circuit board 12 by soldering, respectively.
- the tips 10f of the two battery contact springs 10e on the positive side are urged so as to come into contact with the side surfaces of the batteries 25a and 25b when the batteries are stored.
- an SRAM 14 as a volatile memory for data storage, a gate array IC 15 containing a driver for driving a display device, etc. are stored. Reads data from volatile memory and displays it on display 4 A control device and the like constituted by a CPU 16 and a ROM 17 are mounted.
- the operating member 5 composed of the keys 5a to 5e (see FIG. 1) is connected to the battery holder 10 (in FIG. 9 by a dashed line) in the upper cover 8a made of a thin metal plate. (Shown) is placed above the storage section.
- the operation member 5 is a switch block 13 having internal connection wiring, and stores a plurality of keys 5a to 5e in one block.
- the switch block 13 is positioned and fixed in a recess 8d provided in the upper cover 8a, and is connected to the switch block 13 through a connector L8c provided in a part of the upper cover 8a. Insert FPC 13 a into connector 12 b on circuit board 12.
- ground terminals of the circuit board 12 will be described. As shown in FIG. 7, a ground (GND) terminal 12c is formed on the periphery of the circuit board 12. A panel member 18 described later is soldered to this ground terminal 12. Have been.
- GND ground
- the panel panel member 18 is formed by pressing a thin plate of SUS material or the like by pressing, and has a first arm portion 18a, a second arm portion 18b, and a third arm portion 1 8 and two positioning portions 18 d are integrally formed.
- the first arm portion 18a has a tip portion a1 which is bent so as to be able to press against the upper cover 8a.
- the second arm 18b has a tip a2 which is bent to be able to press against the lower cover 8b.
- the third arm 18c has a tip a3 bent so as to be able to come into contact with a switching pattern 12d (see FIG. 7; description will be given later) provided on the circuit board 12. Further, on the upper surface of the third arm portion 18c, a pressing portion d1 corresponding to the operation through hole 8d (see FIG. 2) formed in the lower cover 8b is formed.
- the first to third arm portions 18a, 18b, 18c of the leaf spring member 18 each have a spring property.
- the panel member 18 is positioned on the circuit board 12 by the two positioning portions 18d.
- the positioning portion 18 d of the panel member 18 is passed through the ground terminal 12 c of the circuit board 12 (see FIG. 7), Position the panel member 18 with respect to the circuit board. Then, the tip of the positioning portion 18d and the ground terminal 12c are soldered and connected to each other.
- Reference numeral 18e in FIG. 13 indicates a soldered portion.
- the first arm 18a passes through an opening 12e cut out in the periphery of the circuit board 12 and its tip a1 hits the inner wall surface of the upper cover 8a.
- the inner wall surface of the upper cover 8a is pressed by the arms 18a of the upper cover.
- the second arm 18b hits the inner wall surface of the lower cover 8b, and presses the inner surface of the lower cover 8b with its panel characteristics.
- the outer peripheral portion of the lower cover 8b is subjected to drawing. As shown in FIG. 13, an operation through hole 8 e for operating the third arm 18 c of the panel member 18 is formed near the step of the drawn portion 8 d, as shown in FIG. 13. I have.
- FIG. 14 shows the positional relationship between the operation through hole 8 e formed in the lower cover 8 b and the panel member 18.
- the position of the panel member 18 is indicated by a broken line. According to FIG. 14, it can be seen that the pressing portion a3 of the third arm portion 18 can be seen from the operation through hole 8e.
- the through hole 8e for operation is formed near the step portion of the drawn portion 8d, the strength of the through hole 8e is high, so that even if an unintended external force is applied to this portion, the lower cover 8e is formed. 8b is not easily deformed and does not push the pressing portion d of the third arm 18c.
- the positioning part 18 d of the panel member 18 passes through the ground terminal 12 c of the circuit board 12 while the panel member 18
- the first arm 18a presses the inner wall surface of the upper cover 8a
- the second arm presses the inner wall surface of the lower cover 8b
- the upper cover 8a and the lower cover 8b are electrically connected to the substrate 12 respectively.
- the third arm 18c is operated by operating the third arm 18c from the outside through an operation through hole 8e formed in the lower cover 8b.
- the switching function can be brought into contact with the switching turn 12 d to activate the reset function.
- the portable electronic device according to the present invention is a PC card of a credit card size and a standard PCMCIA type.
- a connector is integrated with the circuit board, and a liquid crystal cell is integrated through the FPC.
- a liquid crystal cell is positioned and mounted on a case body, an FPC is bent on the bottom surface of the liquid crystal cell, the circuit board is overlapped, and a battery holder is provided at one end of the circuit board and a connector is provided at the other end.
- the structure was adopted. Therefore, the processing functions can be expanded by installing large integrated circuits within the limited space, and at the same time, the display occupies the largest area of the main body. It has become possible to provide portable electronic devices that can increase the amount of information that can be displayed on one screen.
- the portable electronic device has a simple structure in which one panel panel member having at least three arms is attached to the periphery of the circuit board. Grand and The cover member and the circuit board are electrically connected to each other, which serves as a magnetic shield to remove external disturbance components and discharge electric charges on the circuit board. Can be. Further, the other arm has a reset function by operating the through hole for operation with a pin or the like to come into contact with the switch pattern on the circuit board, thereby providing an inexpensive and multifunctional device. It has become possible to provide a portable electronic device having a structure of a plate panel member made of an integral member.
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Telephone Set Structure (AREA)
- Electric Clocks (AREA)
- Battery Mounting, Suspending (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/308,615 US6392881B1 (en) | 1997-09-22 | 1998-09-22 | Portable electronic device |
EP98943093A EP0940771A4 (en) | 1997-09-22 | 1998-09-22 | PORTABLE ELECTRONIC DEVICE |
KR19997004533A KR100361055B1 (ko) | 1997-09-22 | 1998-09-22 | 휴대용 전자기기 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9/256504 | 1997-09-22 | ||
JP25650497 | 1997-09-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999016020A1 true WO1999016020A1 (fr) | 1999-04-01 |
Family
ID=17293560
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1998/004270 WO1999016020A1 (fr) | 1997-09-22 | 1998-09-22 | Dispositif electronique portatif |
Country Status (5)
Country | Link |
---|---|
US (1) | US6392881B1 (ja) |
EP (1) | EP0940771A4 (ja) |
KR (1) | KR100361055B1 (ja) |
CN (1) | CN1123845C (ja) |
WO (1) | WO1999016020A1 (ja) |
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JP2014035645A (ja) * | 2012-08-08 | 2014-02-24 | Fujitsu Ltd | 電子装置 |
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DE19939106A1 (de) | 1999-08-18 | 2001-04-05 | Infineon Technologies Ag | Anzeigeneinheit |
US7075792B2 (en) * | 2002-06-17 | 2006-07-11 | Longwell Company | Assembly structure of electronic card |
KR100694258B1 (ko) * | 2003-07-25 | 2007-03-14 | 엘지전자 주식회사 | 슬라이드 타입 휴대 단말기 |
KR101020340B1 (ko) | 2004-03-26 | 2011-03-08 | 엘지전자 주식회사 | 제3세대 듀얼 모드 이동통신단말기의 인쇄회로기판 실장구조 |
US20070058352A1 (en) * | 2005-09-12 | 2007-03-15 | D & C Technology Co., Ltd. | Package structure for an interface card |
US7733659B2 (en) * | 2006-08-18 | 2010-06-08 | Delphi Technologies, Inc. | Lightweight audio system for automotive applications and method |
US9237685B2 (en) * | 2006-08-18 | 2016-01-12 | Delphi Technologies, Inc. | Lightweight audio system for automotive applications and method |
US7967214B2 (en) | 2006-12-29 | 2011-06-28 | Solicore, Inc. | Card configured to receive separate battery |
WO2008082617A2 (en) | 2006-12-29 | 2008-07-10 | Solicore, Inc. | Mailing apparatus for powered cards |
TWI335542B (en) * | 2007-04-20 | 2011-01-01 | Prologium Technology Co Ltd | Electric supplying sheath |
CN101753644A (zh) * | 2008-12-10 | 2010-06-23 | 深圳富泰宏精密工业有限公司 | 便携式电子装置 |
KR20180013382A (ko) * | 2016-07-29 | 2018-02-07 | 삼성전자주식회사 | 인쇄회로기판 및 이를 포함하는 반도체 메모리 장치 |
KR102627073B1 (ko) * | 2016-11-30 | 2024-01-19 | 삼성디스플레이 주식회사 | 백라이트 유닛, 표시 장치 및 표시 장치의 제조 방법 |
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1998
- 1998-09-22 CN CN98801367A patent/CN1123845C/zh not_active Expired - Fee Related
- 1998-09-22 EP EP98943093A patent/EP0940771A4/en not_active Withdrawn
- 1998-09-22 WO PCT/JP1998/004270 patent/WO1999016020A1/ja not_active Application Discontinuation
- 1998-09-22 US US09/308,615 patent/US6392881B1/en not_active Expired - Fee Related
- 1998-09-22 KR KR19997004533A patent/KR100361055B1/ko not_active IP Right Cessation
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2014035645A (ja) * | 2012-08-08 | 2014-02-24 | Fujitsu Ltd | 電子装置 |
Also Published As
Publication number | Publication date |
---|---|
CN1123845C (zh) | 2003-10-08 |
US6392881B1 (en) | 2002-05-21 |
CN1239565A (zh) | 1999-12-22 |
EP0940771A4 (en) | 2003-01-15 |
KR20000069086A (ko) | 2000-11-25 |
KR100361055B1 (ko) | 2002-11-18 |
EP0940771A1 (en) | 1999-09-08 |
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