JPH0453674Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to flat display devices, particularly those used in fluorescent display tubes, plasma display panels, etc.
The present invention relates to a flat display device that has an improved connection structure between electrodes of a flat display board that displays images, symbols, etc. and a drive circuit.

[Conventional technology]

A drive device for a dot matrix type flat display board such as a fluorescent display tube or a plasma display panel is a scanning electrode drive circuit that sequentially scans a scanning electrode group of either row or column electrodes of the flat display board in a time-division manner. and a control circuit that generates the scanning signal, a data electrode drive circuit that drives the other electrode group of the flat display panel with a data signal corresponding to the input signal while maintaining synchronization with the scanning, and a control circuit that generates the data signal. It is constituted by a circuit that generates driving voltages for these flat display panels.

In a conventional drive device for a flat display panel, as shown in FIG. It was mounted on a printed circuit board 6 made of paper (phenolic resin). In particular, since the flat display panel 1 has an F-shaped electrode 13 whose scanning electrode and data electrode are connected by soldering to the silver electrode terminal 3 of the terminal section 2, a through hole is made in the printed circuit board through which the electrode passes, and In order to reduce mechanical stress on the F-type electrode mounting terminal, which is usually made of glass material, it was mounted with solder 14 at a distance of about 2 mm or more from the printed circuit board surface, and connected to each drive circuit using the printed circuit board.

[Problem that the invention attempts to solve]

However, in the conventional electrode connection structure of the flat display board described above, a through hole is made in the printed circuit board and the electrode is inserted into the hole and soldered. When the number of dots increases to 200 dots, the disadvantage is that the number of steps for inserting and soldering the electrodes into the through holes of the printed circuit board increases proportionally. In addition, since the electrodes are inserted and soldered by drilling through holes in the printed circuit board, the electrodes protrude from the back side of the printed circuit board, and it is necessary to solder at a distance of about 2 mm or more from the surface of the printed circuit board, which makes the device thinner. It had the disadvantage that it was difficult to formulate it.

The purpose of this invention is to eliminate these drawbacks, reduce the number of man-hours needed to connect the electrodes of the flat panel display board and the drive circuit, reduce the cost, and improve the structure for connecting the electrodes of the flat panel display board and the drive circuit, thereby making it possible to reduce the thickness. An object of the present invention is to provide a dot matrix type flat display device.

[Means for solving problems]

The flat display device of the present invention sequentially scans a flat display board and a group of scanning electrodes of either row electrodes or column electrodes of the flat display board in a time-sharing manner using a scanning signal, and a drive circuit that drives the other scanning electrode group with a data signal corresponding to an input signal in synchronization with the scanning; a control circuit that generates the scanning signal and the data signal; and a control circuit that controls the drive voltage of the flat display panel. In a flat display device in which a driving voltage generating circuit to be generated is fixed on a printed circuit board, the cross section is Y-shaped, the U-shaped side is connected to the electrode of the flat display board, and the tip of the remaining side is connected to the electrode of the flat display board. and an electrode connected to the copper thin pattern on the printed circuit board to electrically connect the flat display board to the drive circuit, control circuit, and drive voltage generation circuit, and fixed to the printed circuit board. It is something.

〔Example〕

Next, the present invention will be explained with reference to the drawings.
FIG. 1 is a sectional view showing a flat display device showing an embodiment of the present invention. In the same figure, the electrode terminals 2 of the flat panel display panel 1 are soldered by Pb-Sn-Ag solder to the silver electrodes 3 which are connected to the scanning electrodes and data electrodes inside the flat display panel in one-to-one correspondence. These electrodes are fixed with an epoxy adhesive 5 having a coefficient of thermal expansion matching that of the glass material of the terminal portion 2. The horizontal electrode 4 is aligned with a thin copper pattern 7 having a thickness of 35 μm and connected to a drive circuit 8 on a printed circuit board 6, and then soldered.

Further, in the same figure, a scanning electrode/data electrode driving circuit 8 and a control circuit 9, which are formed into a hybrid IC or a monolithic IC, are mounted on a substrate and connected to a flat display panel 1 through electrodes 4. Further, on the printed circuit board 6, a driving voltage generating circuit 10 is mounted as a hybrid IC.

Since the electrode 4 is horizontal-shaped, it is possible to reduce the mounting area of a flat display board.

[Effect of idea]

As explained above, by using the electrodes according to the present invention having a structure that can be mounted on a flat surface on a flat display board, the flat display board can be easily attached to a printed circuit board on which drive circuits, control circuits, and drive voltage generation circuits are mounted. It can be mounted at a low cost, the electrodes do not protrude from the back side of the printed circuit board, and the part that absorbs mechanical stress is provided in the horizontal direction rather than in the thickness direction, which allows the device to be made thinner.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a flat display device according to the present invention, and FIG. 2 is a sectional view showing a conventional flat display device. 1... Flat display board, 2... Electrode terminal section, 3...
Silver electrode, 4... Horizontal electrode, 5... Epoxy adhesive, 6... Printed circuit board, 7... Thin copper pattern on printed circuit board, 8... Drive circuit, 9... Control circuit, 10... Drive voltage generation circuit, 11... flat display fixing section, 13... F-shaped electrode, 14... solder.

Claims (1)

[Scope of utility model registration request] A flat display board and a group of scanning electrodes of either row electrodes or column electrodes of the flat display board are sequentially scanned in a time-division manner using a scanning signal, and the other scanning electrode group of row electrodes or column electrodes of the flat display board is scanned. A drive circuit that drives with a data signal corresponding to an input signal in synchronization with the scanning, a control circuit that generates the scanning signal and the data signal, and a drive voltage generation circuit that generates a drive voltage for the flat display panel. In a flat display device fixed on a printed circuit board, the cross section has a U-shape, and the U-shaped side is connected to the electrode of the flat display board, and the tip of the remaining side is connected to the copper plate on the printed circuit board. A flat panel display device comprising an electrode connected to a thin pattern to electrically connect the flat display panel to the drive circuit, control circuit, and drive voltage generation circuit, and fixed to the printed circuit board.