JP2001350422A - Display device for electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device for electronic apparatus improved in assembling characteristic, maintenance characteristic, occupying area and packaging efficiency. SOLUTION: When a method for drawing out a flexible printed circuit board (FPC) 2 from liquid crystals 1 and connecting a main body printed circuit board 4 and a contact spring connector 7 is adopted in order to improve the assembly and maintenance characteristics, electric parts 8 are packaged on this flexible printed circuit board (FPC) 2 to effectively utilize the area. The flexible printed circuit board (FPC) 2 is provided with slits 5 in such a manner that the printed circuit board can follow up differences in level without bending.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device of a device having a display unit, and more particularly to an improvement in mounting efficiency, assembling property, maintainability, and optical characteristics when the display unit is electrically connected to a main body printed circuit board. It was made.

[0002]

2. Description of the Related Art An electronic device having a display unit for displaying information does not function unless the display unit is electrically connected to a main body printed circuit board. For this purpose, flexible printed circuit (FPC) and TAB (Tape Automated Bondin)
g), heat seal (general term for flat cables manufactured by printing method on film), conductive rubber connectors, etc.
C) and anisotropic conductive bonding of heat seal and TAB (Tape Automa
ted Bonding), once connected, reuse,
Maintenance was difficult, and there were problems such as that the conductive rubber connector could not cope with narrow pitch wiring.

Hereinafter, a conventional structure for electrically connecting a display unit to a main body printed circuit board will be described.

FIG. 5 is a diagram showing a configuration of a conventional electronic device display unit. In FIG. 5, 1 is a liquid crystal, 2 is a flexible printed circuit board (FPC) for connection, 3 is a land of a main body printed board, and 4 is a main body printed board. The operation of the electronic device display unit configured as described above will be described below. First, the current electronic device display section has a large number of display contents and a large number of wirings, so that the number of connection terminals is large, and naturally the terminals have to be narrow in pitch. Therefore, conductive rubber connectors cannot be used and flexible
It is connected to the main body printed circuit board with a printed circuit board (FPC) or TAB (Tape Automated Bonding).
A method of inserting and fixing a printed circuit board (FPC) is generally used.

[0005]

However, in the above conventional configuration, the flexible printed circuit board (FPC) 2 is soldered to the main body printed circuit board 4 in FIG. This connection method requires dedicated equipment for assembly, and it is difficult to reuse and maintain TAB (Tape Automated Bonding).

FIG. 5 (b) shows a flexible printed circuit board (FPC) 2 connected by a sandwiching connector 7b. Although this structure has good maintainability, the volume occupied by the connector is large and the mounting efficiency is poor. FIG. 5C shows a structure that can compensate for these disadvantages.
Although the contact type connector (contact spring connector) shown in (1) is advantageous in terms of assemblability, maintainability, and occupied area, the land for the contact type connector 7 on the flexible printed circuit board (FPC) 2 has a considerably large area. The point which must be provided and the operation stroke 15 of the connector are limited, and the usable range in the thickness direction is limited, and there is a problem that the flexible printed circuit board (FPC) 2 cannot be fully utilized as a mounting area. In FIG. 5C, reference numeral 9 denotes a holder for holding the liquid crystal and the light guide plate, and reference numeral 14 denotes an operation stroke of the contact spring connector and a dimensional difference between mounted components.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a display device for electronic equipment in which assemblability, maintainability, occupied area, and mounting efficiency are improved.

[0008]

According to a first aspect of the present invention, there is provided a flexible printed circuit (FPC) having a slit for achieving the above object. I do. In order to increase mounting efficiency while using a contact type connector with good maintainability, the connector contact position and a flexible
Eliminate differences in the height direction of the printed circuit board (FPC) position with slits. According to claims 1 to 4 configured as described above,
The mounting area of the set can be improved by effectively utilizing the area of the flexible printed circuit board (FPC).

In order to achieve the above object, the invention described in claims 5 to 7 utilizes a bent portion of a flexible printed circuit board (FPC) to improve mounting efficiency and optical characteristics. It is characterized by. If a flexible printed circuit board (FPC) is bent, the dead space is used to increase the mounting efficiency, and furthermore, the illumination effect is improved by preventing light leakage and reflection. According to the fifth to seventh aspects of the present invention, the dead space in the bent portion of the flexible printed circuit board (FPC) can be effectively used, and the luminance level of the illumination device can be increased.

The invention according to claims 8 to 10 is characterized in that in order to achieve the above object, a printed circuit board or the like on which a light emitting component such as an LED is mounted is integrated with a light guide plate. By integrating the light guide plate and LED,
The displacement can be prevented, the light loss can be suppressed, and the luminance can be increased.
In addition, as in the case of the display unit, the illuminating device is connected to the contact type connector, so that the assembling property and the maintenance property can be improved. According to claims 8 to 10 configured in this manner, the light emitting component and the lighting device can be integrated, and the occupied volume can be reduced and the brightness level of the lighting device can be increased.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) In FIGS. 1 and 2, 1 is a liquid crystal, and 2 is a flexible printed circuit board (FP).
C), 4 is a main body printed board, 5 is a slit of a flexible printed board (FPC), 6 is a connector land of the flexible printed board (FPC), 7 is a contact spring connector, and 8 is a flexible printed board (FPC). The reference numeral 10 denotes an area where the electric component can be mounted.

Regarding the display unit configured as described above,
The operation will be described with reference to FIG. When the flexible printed circuit board (FPC) 2 is pulled out from the liquid crystal 1 to improve the assemblability and the maintainability, and the main body printed circuit board 4 and the contact spring connector 7 are connected, the mounting efficiency is improved in order to improve the mounting efficiency. Flexible printed circuit board
The electric component 8 is mounted on the (FPC) and the area is effectively used. However, the operating stroke of the contact spring connector 7,
Since there is a difference between the operating position and the mounting height limitation of the electric component 8, the flexible printed circuit board (FPC) 2 cannot follow or the flexible printed circuit board (FPC) 2 needs to be bent, and the area is sufficiently increased. May not be available. In order to solve the problem, a slit 5 is provided in the flexible printed circuit board (FPC) 2 so that the flexible printed circuit board (FPC) 2 can follow a step without bending. The slit 5 may be horizontal or vertical, but it is desirable that the direction of the connector land 6 is also changed according to the direction.

As described above, according to this embodiment, since the contact spring connector 7 is used, the assembling property and the maintenance property can be improved, and the mounting efficiency is improved by the slit 5, and the size and the size of the electronic device can be reduced. Higher performance can be realized. In the above description, a single contact spring connector 7 has been described, but this may be configured as a plurality of contact spring connectors as shown in FIG.

(Second Embodiment) In FIG. 3, 1 is a liquid crystal, 2 is a flexible printed board (FPC), 4 is a main body printed board, 7 is a contact spring connector, and 8 is a flexible printed board (FPC). 9 denotes a holding holder, 11 denotes a light guide plate of the lighting device, 12 denotes an LED of the lighting device, and 13 denotes a sheet that reflects light.

With respect to the display unit configured as described above,
The operation will be described with reference to FIG. 3. In order to improve assemblability and maintainability, a method of extracting a flexible printed circuit board (FPC) 2 from the liquid crystal 1 and connecting the main body printed circuit board 4 to the contact spring connector 7 is adopted. In order to improve the mounting efficiency, the flexible printed circuit board
The electric component 8 is mounted on the (FPC) and the area is effectively used. At this time, the bent portion 16 of the flexible printed circuit board (FPC) 2 is simply bent and has no function. Therefore, Flexible Printed Circuit Board (FPC) 2
The LED 12 constituting the illumination device is mounted on the bent portion 16 to utilize the space, or the reflection sheet 13 that leads to the improvement of the performance of the illumination device is attached inside to increase the luminance. Instead of the reflection sheet 13, a reflection member on which reflection printing is performed may be provided inside the bent portion 16 of the flexible printed circuit board (FPC) 2 to increase the luminance.

As described above, according to the present embodiment, since the contact spring connector 7 is used, the assembling property and the maintenance property can be improved. In addition, by using the bent portion effectively, the mounting efficiency is improved, and the electronic equipment is improved. It is possible to realize miniaturization, high performance, and high performance of the lighting device.

(Third Embodiment) In FIG. 4, 1 is a liquid crystal, 2a is a flexible printed circuit board (FPC) for backlight (light guide plate), 2b is a flexible printed circuit board (FPC) for liquid crystal, and 4 is A printed circuit board of the main body, 7 is a contact spring connector, 11 is a light guide plate of the lighting device, and 12 is an LED of the lighting device.

Regarding the display unit configured as described above,
The operation will be described with reference to FIG.
Pull out the printed circuit board (FPC) 2b and print the printed circuit board 4
And the contact spring connector 7 are connected. At that time, the light guide plate
Flexible for backlight (light guide plate) small from 11
The printed circuit board (FPC) 2a is pulled out, and contacts are made simultaneously with the same contact spring connector 7. In this way, the flexible printed circuit board (FPC) 2b for liquid crystal and the flexible printed circuit board (FPC) 2a for backlight (light guide plate) are provided, and the flexible print board (light guide plate) for light The substrate 2a is integrated with the light guide plate 11.

As described above, according to the present embodiment, since the contact spring connector 7 is used, assemblability and maintainability can be improved, and two flexible printed circuit boards (FPCs) 2a are provided on one contact spring connector 7. , 2b, the number of components can be reduced, the mounting efficiency can be improved, the size and performance of the electronic device can be reduced, and the cost can be reduced. In addition, the flexible printed circuit board (FPC) 2b for liquid crystal is provided with the slit 5 in the same manner as in the first embodiment described above. -It is possible to further reduce the cost by replacing the printed circuit board (FPC) 2a with a small hard printed circuit board.

[0021]

As described above, the present invention improves the assemblability of the display section of an electronic device, can cope with automatic assembling, improves the maintainability, and facilitates repair, adjustment, and replacement. By increasing the mounting efficiency, it is possible to reduce the size and weight of the electronic device itself, expand the degree of freedom in design, increase the product value, improve the brightness level of the display illumination device, and improve the visibility. The display device can be realized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram and an arrow view in a first embodiment of the present invention,

FIG. 2 is another configuration diagram and an arrow view in the first embodiment of the present invention,

FIG. 3 is a sectional view showing a configuration of a second embodiment of the present invention;

FIG. 4 is a diagram showing a configuration of a third embodiment of the present invention;

5A is a configuration diagram of an electronic device display unit of a soldering connection according to a conventional embodiment, FIG. 5B is a configuration diagram of an electronic device display unit of a sandwich connector according to a conventional embodiment, and FIG. It is sectional drawing of the electronic device display part of a contact spring connector connection.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Liquid crystal 2 Flexible printed circuit board (FPC) 2a Flexible printed circuit board (FPC) for light guide plate 2b Flexible printed circuit board (FPC) for liquid crystal 3 Connection land of main body printed circuit board 4 Main body printed circuit board 5 Flexible printed circuit board (FPC) ) 6 Flexible printed circuit board (FPC) contact spring connector land 7 Contact spring connector 8 Electrical components mounted on flexible printed circuit board (FPC) 9 Holder for holding liquid crystal and light guide plate 10 Flexible printed circuit board (FPC) 11) Light guide plate 12 Lighting device LED 13 Lighting device reflector 14 Operating stroke of contact spring connector and dimensional difference between mounted components 15 Operating stroke of contact spring connector 16 Bend

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 2H091 FA14Z FA41Z FA45Z FC12 FD01 GA11 LA01 LA09 LA16 2H092 GA45 GA47 GA50 NA30 PA06 PA12 PA13 5E344 AA01 AA10 AA15 AA28 BB04 CC05 CD15 CD18 EE12 5G435 AA17 AE47 FF03

Claims (11)

[Claims] 1. A display device for an electronic device, wherein a flexible printed circuit board on which a circuit for driving the display unit is mounted is electrically connected to a display unit and a main body printed circuit board by a contact connector. A display device for an electronic device, wherein a slit is provided in a printed board, and a difference in a fixing position in a thickness direction is absorbed by the flexibility of the flexible printed board and the slit of the flexible printed board. 2. The display device for an electronic device according to claim 1, wherein said slit and said contact type connector are provided sideways. 3. The display device for an electronic device according to claim 1, wherein the slit and the contact-type connector are provided in a vertical direction. 4. The display device for an electronic device according to claim 3, wherein a plurality of said slits and said contact type connectors are provided. 5. A display device for an electronic device, wherein a flexible printed circuit board on which a circuit for driving the display unit is mounted is electrically connected to a display unit and a main body printed circuit board by a contact connector. An electronic device display device, further comprising an illuminating device provided on the inside of a bent portion of the printed board on the back side of the display portion so that display contents can be confirmed. 6. A display device for an electronic device, wherein a flexible printed circuit board on which a circuit for driving the display unit is mounted is electrically connected to a display unit and a main body printed circuit board by a contact connector. An illuminating device for allowing the display content to be confirmed inside the bent portion of the printed circuit board to the back side of the display portion, and the light emitted from the illuminating device is reflected inside without leaking to the outside, and the illuminance brightness of the display portion A display device for an electronic device, comprising: a reflection sheet capable of raising the height or a reflection member subjected to reflection printing. 7. The display device for an electronic device according to claim 6, wherein a reflection member on which reflection printing is performed is provided in place of the reflection sheet. 8. A light guide plate for electrically connecting a display section and a main body printed board by a contact type connector to a flexible printed board on which a circuit for driving the display section is mounted, and guiding light to illuminate the entire display. A display device for electronic equipment comprising: a light-emitting component mounted on the flexible printed circuit board;
A display device for an electronic device, wherein a printed circuit board is tightly integrated with the light guide plate. 9. A light guide plate for electrically connecting a display section and a main body printed board by a contact type connector to a flexible printed board on which a circuit for driving the display section is mounted and guiding light to illuminate the entire display. A display device for an electronic device, comprising: a first flexible device, on which a light emitting component is mounted and which is closely attached to and integrated with the light guide plate.
A display device for an electronic device, comprising: a printed board; and a second flexible printed board on which a circuit for driving the display section is mounted. 10. The display device for an electronic device according to claim 9, wherein a slit is provided in said second flexible printed circuit board. 11. A portable terminal device comprising the display device for an electronic device according to claim 1, wherein necessary information can be displayed on the display device. .