JPS5916305B2 - liquid crystal display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid crystal display device such as a liquid crystal display type electronic desk calculator.

The present invention relates to a structure in which a liquid crystal panel in which an IC chip having a display drive function, a calculation function, or both functions is disposed on one glass of the liquid crystal display body is connected to a calculation keyboard and a power supply battery.

An object of the present invention is to easily connect a liquid crystal display panel equipped with an IC chip to a calculation keyboard and a power supply battery. DESCRIPTION OF THE PREFERRED EMBODIMENTS The liquid crystal display device of the present invention will be explained below with reference to the drawings, taking a calculator as an example.

FIG. 1 is a cross-sectional view of a first embodiment in which a liquid crystal display panel on which an LSI is arranged is connected to a keyboard section by a metal clip, and a battery is sandwiched between the liquid crystal display panel and the keyboard substrate.

1 is an upper electrode substrate, and 2 is a lower electrode substrate, each of which has a transparent electrode 3.

4 is a spacer for maintaining a gap, 5 is a liquid crystal, 6 and 7 are soil polarizing plates, and 8 is a reflective plate 9, which is a conductive film and is arranged on the electrode substrate.

10 is an IC chip having a display driving or calculation function.

The liquid crystal display panel configured as described above is electrically connected to the conductive film 13 of the keyboard substrate 12 by a clip 11 having an integral structure manufactured by press-molding a thin metal plate.

Reference numeral 14 denotes a power supply battery which is sandwiched between the conductive film 9 of the liquid crystal panel and the conductive film 13 of the keyboard substrate.

15 is a calculation key.

The features of this example are that it can be electrically connected directly to the keyboard board using an integrated clip made by press-forming an inexpensive thin metal plate, and that the power battery is sandwiched between the liquid crystal panel and the keyboard board. Therefore, the purpose is to reduce the number of parts.

FIG. 2 shows a second embodiment, which is almost the same as the first embodiment, but in which the electrical connection from the liquid crystal panel to one pole of the power supply battery 14 is made by a lead piece 16. This lead piece may be a lead wire. A feature of this example is that the power battery can be placed in any position while being placed on the keyboard board. FIG. 3 shows a third embodiment, in which a liquid crystal panel equipped with an LSI is electrically connected directly to a conductive film 18 of a keyboard board 17 made of a flexible printed circuit board using a conductive material 19.

Further, the power supply battery 14 is sandwiched between the conductive film 9 surface of the liquid crystal panel and the conductive film 18 of the keyboard board made of a flexible printed circuit board. As the conductive material 19, solder, conductive adhesive, conductive rubber, or the like is used. Also, the conductive rubber is the conductive film 9 surface of the liquid crystal panel or the conductive film 1 of the keyboard board.
It may be fixed to eight sides in advance. The characteristics of this example are:
A flexible printed circuit board is used as a keyboard board, and a liquid crystal panel is directly electrically connected to the printed circuit board using a conductive material, so there is no need to install parts for electrical connection. FIG. 4 shows a fourth embodiment, which is almost the same as the third embodiment, but in which both poles of the power battery 14 are sandwiched between flexible printed circuit boards. The feature of this example is that the power supply battery can be placed in any position regardless of the position of the liquid crystal panel.

Figures 5 and 6 show the fifth and sixth embodiments, and the third and fourth embodiments.
This is almost the same as the embodiment described above, but this is an example in which the 9 surfaces of the conductive film of the liquid crystal panel and the 18 surfaces of the conductive film of the keyboard substrate made of a flexible printed circuit board are welded and electrically connected by thermocompression bonding or ultrasonic welding. A feature of these examples is that no bonding material or bonding parts are required to electrically connect the keyboard substrate and the liquid crystal panel.

7 and 8 show the seventh and eighth embodiments, which are almost the same as the sixth and seventh embodiments, but a keyboard manufactured using nine conductive films of a liquid crystal panel and a flexible printed circuit board. The surface of the conductive film 18 of the substrate is crimped with an elastic material 19 as a pillow to establish an electrical connection.

A feature of these examples is that the liquid crystal panel can be easily attached and detached because the electrical connection between the liquid crystal panel and the keyboard substrate is simply crimped with an elastic material. As described above, in the liquid crystal display device of the present invention, the circuit board such as the keyboard is made of a flexible board, one end of which is connected to the extension of the electrode board of the liquid crystal display body, and the power battery is sandwiched therebetween.

Therefore, since the circuit board that holds the power battery is flexible, it has appropriate elasticity, making it easy to hold the battery, making it easy to make electrical connections between the power battery and the electrode board, and between the power battery and the circuit board, and making the connection reliable. Highly sexual. Since the circuit board is flexible, the connection between the circuit board and the liquid crystal display will not be impaired by sandwiching the power battery. Further, the degree of freedom in the shape of the circuit board is high, and the display device can be made smaller and thinner, and can be constructed in a relatively free shape. Further, the liquid crystal display device of the present invention does not require a so-called battery holder, has a small number of parts, and is easy to manufacture. As described above, according to the present invention, a liquid crystal panel equipped with an IC chip can be easily electrically connected to a calculation keyboard and a power supply battery, and an inexpensive liquid crystal display calculator can be provided.

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[Brief explanation of the drawing]

FIGS. 1 and 2 are cross-sectional views of an example in which the electrical connection between the liquid crystal panel and the keyboard board is made using clips. 1 to 10 represent components of the liquid crystal panel. 11 is a creep, 12 and 13 are keyboard boards, 14 is a power battery, 15 is a calculation key, and 16 is a battery lead piece. FIGS. 3 and 4 are cross-sectional views of an example in which electrical connection between a liquid crystal panel and a flexible keyboard board is made using a conductive material. 17 and 18 are substrates below the flexible keyboard, and 19 is a conductive material. FIGS. 5 and 6 are cross-sectional views of an example in which the electrical connection between the liquid crystal panel and the flexible keyboard board is made by ultrasonic welding and thermocompression bonding. FIGS. 7 and 8 are cross-sectional views of an example in which the electrical connection between the liquid crystal panel and the flexible keyboard board is crimped using an elastic material as a pillow. 19 represents an elastic material.

Claims (1)

[Claims] 1. In a liquid crystal display device consisting of at least a liquid crystal display body, a power supply battery, and a circuit board such as a keyboard, the liquid crystal display body has one of two electrode substrates sandwiching the liquid crystal extended, and a flexible substrate attached to the extension part. One end of the circuit board is connected, the electrode battery is sandwiched between the electrode board extension part and the circuit board, one pole of the power battery is connected to the electrode board extension part, and the other pole is connected to the circuit board. A liquid crystal display device configured to be connected to a substrate.