JPS5846719B2 - Display device for electronic wristwatch with computer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device for a wristwatch with an electronic computer.

In recent years, wristwatches that display the time digitally using electro-optical display devices such as liquid crystals, light-emitting diodes, or electrochromic materials have rapidly developed, and along with the development of integrated circuits, they have become smaller and more multifunctional, resulting in longer lifespans, etc. It is also sufficiently practical.

For example, the battery life of crystal oscillation type digital watches that use liquid crystal display is already two years.

On the other hand, electronic desktop calculators, like wristwatches, have become smaller and more multi-functional with the development of integrated circuits, and low-power display devices such as liquid crystals have come to be used as display devices.

The present invention focuses on the common features between the electronic calculator and the digital display wristwatch, and relates to a wristwatch with an electronic calculator that can house the digital wristwatch and the electronic desktop calculator in the same wristwatch case and display the time and calculation functions on the same display device. It is something.

When a display device using a liquid crystal material has a clock display section and a computer display section, the number of connection terminals connected to the display device can be greatly reduced by driving the display body by matrix driving.

For example, when displaying 8 digits on the computer display 1 and 6 digits for hours, minutes, and seconds on the clock display 2 as shown in Fig. 1, the number of connection pins is approximately 100, which is the same as the total number of segments, in case of static drive. Book required.

However, in the case of matrix drive, as shown in FIG. 2, there are seven upper electrode lead wires 20 common to all segments and wires 21', 2 of lower electrodes 2L22, 23 for driving four power supplies.
2' and 23' are 3 in the display element consisting of 7 segments each.
The number of cells required for each cell is 59 in total, which is about half, so that in a small cell such as a wristwatch type, the fewer the number of connection pins 24, the more stable the connection of the display device is, and the easier it is to design a pattern.

Therefore, M) IJ Lux dynamic type is more advantageous than static drive in terms of the number of connection pins.

However, as shown in FIGS. 2 and 3, in the matrix drive, the upper electrode lead wire 20 of each segment and the lower electrode 2L 22, 230 wires 21', 22' for driving the four power supplies.
.

A portion 40 is created where 23' intersects at spaces 25, 26 and 27 other than each segment.

This cross section 40 is inconvenient because the liquid crystal is driven and unnecessary lines or points are visible in the display.

In the liquid crystal display device of the present invention, the point where these lead wires intersect is on the lower surface of a partition 30 shown in FIG. This arrangement is such that the dots or lines at the crossing points are not visible from the outside even if they are driven, and this is practically effective.

As another implementation method, the wiring can be made to cross at the glass seal portion of the display cell so that the crossing point cannot be seen.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the connection terminals when statically driving the liquid crystal display element, FIG. 2 is a plan view showing the connection terminals when the liquid crystal display element of the present invention is driven in matrix, and FIG. FIG. 4 is a front view of the display device of the present invention. 20... Upper electrode lead wire, 21', 22', 2
3'--...Lower electrode lead wire, 30...Parting, 40...Cross point.

Claims (1)

[Claims] 1. It has a time counting device and an electronic computing device, and the same liquid crystal cell separates and displays a liquid crystal display section for a watch and a liquid crystal display section for an electronic computer, and the liquid crystal display device is a matrix-driven electronic computer with an electronic computer. An electronic wristwatch with a computer, characterized in that an upper electrode lead wire and a lower electrode lead wire of a liquid crystal display device that performs matrix drive are configured to cross under a parting plate that partitions the liquid crystal cell. display device.