JPH0532832Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a dot matrix type liquid crystal display device.

(Technical background) In a dot matrix type display, band-shaped electrodes (transparent electrodes) are attached to the inner surfaces of both glass substrates of a liquid crystal cell so as to be orthogonal to each other, and the intersections are used as pixels.One side is scanned. one electrode and the other as a signal electrode.

In that case, as the number of scanning electrodes increases, the voltage application time per row becomes shorter. That is, the duty becomes smaller. If the duty is too small, the contrast will deteriorate, so there is a limit to the duty ratio, and the number of scanning electrodes (pixel number) is limited, making it impossible to improve sharpness.

One way to increase the number of pixels is to divide the signal electrode into multiple systems and drive each system simultaneously, but due to the space for drawing out the signal electrodes, one liquid crystal cell cannot be divided into two. This is the limit, and if the size is large, the number of pixels will be insufficient.

For this reason, multiple cells are arranged in parallel, but a relatively large space is required between each cell for terminal processing, and there is a boundary between these cells, that is, an area that is useless for display. This makes the display extremely difficult to see. Furthermore, it takes a lot of time to combine each liquid crystal cell with high precision.

Therefore, as shown in FIGS. 1 to 3, a front side glass substrate 1 is used as a common single plate, and a plurality of small back side glass substrates 2 are arranged vertically at predetermined intervals on this. are adhered with adhesive 3 to form a plurality of liquid crystal chambers, in which liquid crystal 4 is sealed, and the terminals of the signal electrodes 5 adhered to the front glass substrate 1 are processed in the space between the rear glass substrates 2. It has been proposed that the terminals of the scanning electrodes 6, which are made of conductive rubber or the like and adhered to the back glass substrate 2, be drawn out using conductive paint 7 at the ends of the electrodes, and then connected to the terminal portions 8 of the front glass substrate 1. In addition, 9
and 10 are polarizing plates.

In this way, if the front glass substrate 1 is used as a common single plate and a plurality of glass substrates 2 are placed facing each other in a fixed arrangement to form a plurality of liquid crystal chambers, individual liquid crystal cells can be arranged side by side. The space between each room is significantly reduced compared to the previous model, and the display becomes more attractive.

However, it is difficult to accurately connect to the drive circuit (printed circuit board at the back) in a narrow space.
In particular, it is difficult to combine with public lighting. In order to solve this problem, it would be possible to slightly widen the space between each chamber, but then the spacing between the scanning electrodes would be widened to a certain extent, making it impossible to display graphics or the like.

(Purpose of the invention) An object of the invention is to provide a liquid crystal display device in which terminal processing can be performed accurately even if the space between each chamber is narrow without interfering with displaying graphics or the like.

(Summary of the invention) This invention consists of a single front glass substrate on which signal electrodes divided into three or more systems are adhered, and scanning electrodes divided into three or more systems with a thickness of 0.2 mm or less. The back side substrates of the two are arranged facing each other in a fixed array, and the peripheral parts are bonded with adhesive to form multiple liquid crystal chambers.The liquid crystal is sealed inside, and polarizing plates are placed on the outside of the front and back substrates. A transparent substrate for terminal extraction, which is connected to the end of the signal electrode of the front glass substrate through conductive paint and has a conductive pattern formed with a transparent electrode material whose side edge becomes a terminal portion, is attached to the substrate. The connection with the drive circuit is made on the side, and the space between each chamber is made as narrow as possible.

(Example) Figures 4 to 8 show an example of the present invention, with the same components as in Figures 1 to 3 being given the same reference numerals. Reference numeral 1 denotes a common single-plate front glass substrate, and 2A to 2C denote rear substrates each of which is approximately the size of front glass substrate 1 divided into three, and which use glass plates or films with a thickness of 0.2 mm or less. The peripheries of front glass substrate 1 and rear substrates 2A to 2C are bonded with adhesive 3 to form three liquid crystal chambers, into which liquid crystal 4 is sealed. Three divided signal electrodes 5 are attached to the inner surface of front glass substrate 1,
The rear substrates 2A to 2C are coated with scanning electrodes 6 on their inner surfaces. A polarizing plate 9 is attached to the outer surface of the front glass substrate 1, and a polarizing plate 10 of approximately the same size is attached to the outer surfaces of the rear substrates 2A to 2C. A terminal glass substrate 11 is attached to the rear side of the polarizing plate 10, and its conductive pattern is connected to the ends of the signal electrodes 5 of the front glass substrate 1 through conductive paint 12. As shown in Fig. 8, the terminal glass substrate 11 is formed with a conductive pattern 11A, which serves as a terminal for the signal electrodes, and a horizontal portion whose lower end is bent at a right angle and extended to the side edge, made of a transparent electrode material, and a conductive pattern 11B, which serves as a terminal for the scanning electrodes, and is connected to the driving circuit on both sides. In this case, the scanning electrodes 6 are connected to the terminal parts 8 of the front glass substrate 1 using conductive paint 7, and the terminal parts 8 are connected to the conductive pattern 11B of the substrate 11 through conductive paint 13.

With such a structure, the signal electrode 5 of each system
is connected to the conductive pattern 11A of the terminal drawer board 11 between each liquid crystal room by conductive paint 12, and is connected to the drive circuit at the side edge of the board 11, so that a narrow space between the rooms is sufficient. As a result, the spacing between the scanning electrodes 6 is made uniform, making it possible to display graphics and the like. It also becomes easy to combine with back lighting.

Although the conductive paint 12 is used to connect the signal electrode 5 and the terminal drawing board 11, an anisotropic conductive film having conductivity in only one direction may be used. Further, although a glass substrate is used as the terminal drawing board 11, a flexible film may also be used. In that case, the connection with the signal electrode 5 may be directly crimped without using conductive paint 12 or the like. It is possible.

(Effects of the invention) As described above, according to the invention, a transparent substrate for drawing out terminals on which a conductive pattern is formed using a transparent electrode material is attached to the back side, and the space between each liquid crystal chamber is separated from the signal electrode. Since it is used only for connection and terminal processing is performed on both sides of the board, it is easy to connect to the drive circuit and also to combine with back lighting. Furthermore, since the space between each liquid crystal chamber has been made as narrow as possible, it is also possible to display graphics and the like.

[Brief explanation of the drawing]

In Figure 1, the front glass substrate is a common single plate.
A front view showing the structure of a liquid crystal display device in which a plurality of small back side glass substrates are arranged to face each other to form a plurality of liquid crystal chambers.
3 is a sectional view taken along the - line in FIG. 1, FIG. 4 is a front view showing an embodiment of the present invention, FIG. 5 is a sectional view taken along the - line in FIG. 4, and FIG. 6 is a sectional view taken along the line - 7 is a sectional view taken along the line -- in FIG. 4, and FIG. 8 is a front view of the terminal drawing board in the same embodiment. DESCRIPTION OF SYMBOLS 1... Front side glass substrate, 2A to 2C... Back side substrate, 3... Adhesive, 4... Liquid crystal, 5... Signal electrode, 6... Scanning electrode, 7, 12 and 13... Conductive paint, 8... ...Terminal portion, 9 and 10...Polarizing plate, 11...Transparent substrate for terminal extraction, 11A and 11B...Conductive pattern.

Claims (1)

[Scope of utility model registration request] A single front glass substrate covered with signal electrodes divided into three or more systems, and a back substrate with a thickness of 0.2 mm or less, each divided into three or more divided scan electrodes, are placed facing each other in a fixed array. Then, the peripheral parts are bonded with adhesive to form a plurality of liquid crystal chambers, and the liquid crystal is sealed inside. Polarizing plates are placed on the outside of the front and back substrates, and the 1. A liquid crystal display device, comprising: a transparent substrate for taking out a terminal, which is connected to an end of a signal electrode of a front glass substrate, and has a conductive pattern formed of a transparent electrode material, the side edge of which becomes a terminal portion.