JPH0531626Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Field of application of invention] The present invention relates to a liquid crystal display device.

[Background of the idea]

As a conventional liquid crystal display device, there is one shown in FIG. 9, for example.

This is an automobile instrument that uses a liquid crystal display device, and is equipped with a bar graph speedometer 1, a tachometer 2, and a direction indicating section 3, as well as a speed display section 4 and a rotation speed display section 5 that are digitally displayed. A display scale 6 and a display unit 7 surrounded by a broken line Q are always displayed.

By the way, since such a liquid crystal display device has a large display capacity, the wiring area of the lead wires drawn out from the segment electrodes and the common electrode within the liquid crystal cell inevitably tends to become narrow.

Therefore, it is difficult to wire the lead wires from the segment electrodes and common electrodes within a narrow wiring area in a short way without intersecting each other, and it is difficult to change the display pattern position, terminal position, or arrangement of the terminals once decided. However, there is a problem in that the lead wires must be wired using complicated methods such as detouring the lead wires, making the lead wires themselves thinner, and narrowing the spacing between the lead wires. Ta.

[Purpose of invention]

The present invention was made to solve these conventional problems, and the purpose is to provide a liquid crystal display device that has a simple structure and can efficiently wire lead wires for external extraction of electrodes. be.

[Example of idea]

The present invention will be explained in detail below based on the embodiments shown in FIGS. 1 to 8.

Fig. 1 is a sectional view showing an embodiment of a liquid crystal display speedometer for a vehicle to which the present invention is applied, Fig. 2 is a partially transparent plan view showing the main parts thereof, and Fig. 3 is a plan view thereof. There is.

Reference numeral 10 denotes a liquid crystal cell, and a pair of glass electrode substrates 11 and 11' are provided with polarizing plates 12 and 12, respectively, on the outer surface sides thereof.
12' are provided with their polarization axes parallel to each other. And on the back side of the lower polarizing plate 12',
A light-shielding sheet 15 (seventh one) has a light-shielding portion 13 formed in a part of the transparent sheet corresponding to the display position of the speed unit display portion Q, and a speed unit (KM/H) pattern 14 cut out in this light-shielding portion 13. (see figure) is provided, and furthermore, a color filter 16 is provided on the back surface of this light shielding sheet 15.

This liquid crystal cell 10 includes a pair of electrode substrates 11, 1
Transparent electrodes 16, 16' are provided on the opposing surface of the substrate 1' in correspondence with the speed display section P (see FIGS. 4 and 5), and the substrate 11 is provided so as to cover the transparent electrodes 16, 16'. , 11', the alignment film 1 is formed on the entire surface of the opposing surfaces.
7, 17' are provided, and a twisted nematic liquid crystal 19 is sealed between the pair of electrode substrates 11, 11' facing each other with a seal 18 in between. Also,
A translucent member 20 is provided between the pair of electrode substrates 11, 11' corresponding to the speed unit display section Q, and the liquid crystal 19 is excluded between the translucent member 20.

Therefore, pattern 14 of speed unit display section Q
The light from the light source 21 that passes through the lower polarizing plate 1
2' blocks transverse vibration waves, for example, but the translucent member 20 from which the liquid crystal 19 is removed
Since the upper polarizing plate 12 is parallel to the polarization axis of the lower polarizing plate 12', the speed unit display section passes through the upper polarizing plate 12 and reaches the upper polarizing plate 12. The Q pattern 14 is always displayed in color.

Further, the light incident on the speed display section P from the light source 21 travels straight through a portion where a voltage is applied between the pair of electrodes 16 and 16', and the speed is displayed in color in a negative display.

That is, since the speed unit display section Q is constantly displayed without using a liquid crystal, it is necessary to provide display electrodes on the opposing surfaces of the pair of electrode substrates 11 and 11' corresponding to the speed unit display section Q. In this embodiment, as shown in FIGS. 2 and 6, lead wires 22 and 23 for external extraction of the upper electrode 16 and lower electrode 16' are wired there. R
is a terminal formed at the end of the lead wire 22 of the upper electrode 16.

In this embodiment, the light-transmitting member 20 of the liquid crystal cell 10 is made of a material with good light transmittance, such as an epoxy thermosetting adhesive, and the lower electrode substrate 11'
It is formed by screen printing. Note that the seal 18 is also printed and molded on the lower electrode substrate 11' using the same material as the translucent member 20, and the printing of this seal 18 and the printing of the translucent member 20 are performed at the same time. (See Figure 6).

As described above, according to this embodiment, the liquid crystal cell 1
0, a translucent member 20 from which the liquid crystal 19 is removed is provided corresponding to the display position of the speed unit display section Q, and the speed unit pattern 1 is displayed through the translucent member 20.
4 is displayed at all times, display electrodes 16,
The lead wires 22 and 23 of 16' can be wired, and since the liquid crystal 19 is excluded from inside this transparent member 20, the lead wires 22 and 23 can be wired facing each other. The display electrode lead wires 22 and 23 can be wired efficiently, and the amount of display can be increased.

Furthermore, a pair of electrode substrates 11 of the liquid crystal cell 10,
11' are supported in a spaced manner by the transparent member 20, so that in the case of a large liquid crystal cell, the gap between the electrode substrates can be made uniform.

In addition, in the above-described embodiment, the light-transmitting member 2
Although epoxy-based thermosetting adhesive is screen printed on the electrode substrate in No. 0, the present invention is not limited to this, and may be a transparent cylindrical member made of acrylic or the like.

Further, the transparent sheet 15 on which the pattern 14 of the speed unit display section Q is formed may be provided on the inner surface of the lower polarizing plate 12', or on the inner or outer surface of the upper polarizing plate 12. Both the speed display section P and the speed unit display section Q may be displayed in the same color or in different colors.

Furthermore, in the above-described embodiment, the light-shielding sheet 15 has a light-shielding section 13 provided in a part of the transparent sheet corresponding to the speed unit display section Q, and a speed unit display pattern 14 is cut out in this light-shielding section 13. 8th
As shown in the figure, the light shielding part 13 may be provided on the entire surface of the sheet, and the pattern 24 of the speed display part P and the pattern 14 of the speed unit display part Q may be cut out.

[Summary of the idea]

As explained above, the present invention consists of a pair of insulating transparent substrates 11, 1 facing each other with a liquid crystal 19 in between.
Transparent electrodes 16 for selection display section P are provided on both inner surfaces of 1'.
16', and a light-shielding layer 15 in which at least a notch is formed with a constant display section Q disposed in a part other than the selection display section P of the liquid crystal cell.
are arranged in a stacked manner, and a translucent member 20 is provided between the pair of insulating transparent substrates 11 and 11' corresponding to the always-on display section Q to exclude the liquid crystal 19 in that region; Transparent electrode 1
1 and 11' are drawn out to the outside of the liquid crystal cell 10 through inner surfaces of the insulating transparent substrates 11 and 11' corresponding to the light-transmitting member 20. This is a liquid crystal display device.

[Effect of idea]

Therefore, according to the present invention, since there is no liquid crystal in the part corresponding to the constant display part Q and there is no display electrode, it is possible to freely wire the lead wire to that part. This provides the effect of efficient wiring.

[Brief explanation of the drawing]

1 to 7 show an embodiment of a liquid crystal display device according to the present invention, FIG. 1 is a sectional view taken along the line A-A in FIG. 3, FIG. 2 is a partially transparent plan view thereof, Fig. 3 is a plan view, Fig. 4 is a plan view of the upper electrode, and Fig. 5 is a plan view of the upper electrode.
6 is a plan view of the lower electrode, FIG. 6 is a plan view showing how the seal and the transparent member are attached, and FIG. 7 is a plan view of the light-shielding sheet. FIG. 8 is a plan view showing another embodiment of the light-shielding sheet, and FIG. 9 is a plan view of a conventional liquid crystal display device. 10...Liquid crystal cell, 11,11'...electrode substrate,
12, 12'... Polarizing plate, 13... Light shielding part, 14
... Pattern, 15 ... Light-shielding sheet, 16,1
6'...Transparent electrode, 17, 17'...Alignment film, 18
... Seal, 19 ... Liquid crystal, 20 ... Transparent member, 21 ... Light source, 22, 23 ... Lead wire, 2
4...Pattern.

Claims (1)

[Scope of utility model registration request] A liquid crystal cell 10 in which transparent electrodes 16, 16' for a selection display section P are formed on both inner surfaces of a pair of insulating transparent substrates 11, 11' facing each other with a liquid crystal 19 in between, and the selection display section P of the liquid crystal cell. The constant display section Q disposed at a location other than the above is provided with at least a cutout-formed light shielding layer 15 stacked thereon, and corresponds to the constant display section Q between the pair of insulating transparent substrates 11 and 11'. the liquid crystal 19 of that part.
A translucent member 20 is provided to eliminate the
23 is extended to the outside of the liquid crystal cell 10 through the inner surface portion of the insulating transparent substrates 11, 11' corresponding to the light-transmitting member 20.