JPH0159604B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a liquid crystal display device with touch entry.

Conventional technology In a conventional liquid crystal display device with touch entry, two transparent conductive materials are arranged on the display surface with a gap between them so that their conductive surfaces face each other, and these conductive materials are arranged in a matrix in the X and Y directions. Some display devices are designed so that when a conductor is touched, the electrodes corresponding to the X and Y axes of the touched part are turned on, and some piezoelectric elements are arranged around the display surface. There are also devices in which a transparent body is placed over the entire surface of the display body to press down the piezoelectric element, but in addition to the display body, these conventional devices also include the above-mentioned contact structure for touch entry, etc. Since it is necessary to add a piezoelectric structure, it is relatively expensive, and it also has the disadvantage of being unstable in terms of durability and reliability.

OBJECTS OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a liquid crystal display device with touch entry that is highly durable and reliable.

SUMMARY OF THE INVENTION According to the present invention, it is an object of the present invention to disperse a large number of acicular magnetic particles coated with a surfactant in a liquid crystal material of a liquid crystal display cell, and to disperse a part of the display area of the display cell. This is achieved by arranging a plurality of touch entry sections in the area, and arranging such that when a permanent magnet is brought close to any one of the sections, information specified by that section is displayed. The needle-like magnetic pieces are coated with a dichroic dye, so that when a permanent magnet is brought close to one of the touch entry sections, the information specified by that section is displayed in color. It can also be configured.

Embodiment Hereinafter, the present invention will be specifically explained based on the illustrated embodiment. In FIGS. 1 to 3, 1 indicates a plurality of touch entry sections 1a, 1a, 1a,
...and code section 1b, 1 for multiple touch entries
b, 1b, .
Electrode plates 2a, 2 corresponding to 1a, . . ., respectively
a, 2a, ... and each electrode plate 2a, 2a, 2a, ...
Conductive wire portions 2a', 2a', respectively drawn out from...
2a′, ... and touch entry code section 1b,
Electrode plates 2 corresponding to 1b, 1b, . . .
b, 2b, 2b, ... and each electrode plate 2b, 2b, 2
Conductive wire portions 2b', drawn out from b, . . .
2b', 2b', . . . and a transparent conductive film 3 provided with a common electrode 3a facing the plurality of electrode plates 2a, 2a, 2a, . A common electrode 3b facing the electrode plates 2b, 2b, 2b, . . . and a conductive wire portion 3 drawn out from the common electrode 3b.
4 is a transparent conductive film provided with b', and 4 is a liquid crystal of various types (twisted nematic type,
Guest-host type, dynamic scattering mode type, phase change type, etc.) are dispersed in the medium, and the surface is coated with a surfactant as shown in Figure 4. Small acicular magnetic pieces of 0.1 μm or less made of Fe ₂ O ₃ , for example, 5 are conductive wire portions 2a', 2a', 2a', . . .
Output terminals 5a', 5a', 5 connected to
output terminals 5b', 5b', 5b', . . . connected to conductive wire portions 2b', 2b', 2b', .
..., an output terminal group 6 includes conductive wire portions 3a' and 3
Output terminals commonly connected to b', 7 is a seal, 8
is a horizontal alignment treatment layer. The touch entry sections 1a, 1a, . . . are provided with command display sections 1A, 1A, 1A, . . . as shown in FIG. 1, respectively, and the output terminals 5a', 5b' It is connected to an electronic circuit (not shown) for processing the received signal and changing the liquid crystal display.

Since the present liquid crystal display device is constructed as described above, as shown in FIG.
1a, 1a, . ° The state changes to the state shown by the solid line in FIG.
Increase by 20-30% or more. Upon detecting this increase in capacitance, a specific signal is output from the output terminals 5a and 5b according to a command or code corresponding to the section, and this signal is processed by an electronic circuit (not shown) and displayed on the dot matrix display section. Display is performed as instructed. In this way, display and touch entry are performed within the same cell.

5 and 6 show other embodiments of the present invention which have been subjected to vertical alignment treatment, in which reference numeral 10 indicates an already coated with vertical alignment surfactant as clearly shown in FIG. Acicular magnetic material piece similar to the above-mentioned example, 1
1 is a vertical alignment treatment layer. Other configurations and operations are similar to those of the previously described embodiments, so the same parts and portions will be given the same reference numerals and detailed explanations will be omitted.

In the embodiment described above, if the acicular magnetic material pieces 4 are coated with a dichroic dye instead of being coated with a surfactant, the corresponding area of the display surface will be colored when the above-mentioned OFF state changes to the ON state. It is even more effective when it becomes visible.

Effects of the Invention As described above, according to the present invention, there is no special contact structure or piezoelectric structure for touch entry as in conventional devices, so a liquid crystal display with touch entry is stable in terms of durability and reliability. equipment can be provided. Furthermore, since it is possible to perform a colored display upon touch entry, this type of display device is extremely convenient in practice. Furthermore, the present invention has the advantage that this type of device can be manufactured at relatively low cost.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of a liquid crystal display device with touch entry according to the present invention, and FIG. 2 is an explanatory side view when the horizontal alignment treatment layer of FIG. 1 is used.
Fig. 3 is a plan view showing the electrode pattern corresponding to the touch entry section, Fig. 4 is a partially enlarged view of the circled part in Fig. 2, and Fig. 5 is a plan view showing the electrode pattern corresponding to the touch entry section. FIG. 6 is a side view with the same name as FIG. 2, and FIG. 6 is a partially enlarged view of the circled part in FIG. 1... Liquid crystal cell, 1a... Touch entry section, 2, 3... Transparent conductive film, 2a, 2b... Electrode plate, 3a, 3b... Common electrode, 4, 10... Surfactant or two colors acicular magnetic piece coated with a sexual pigment, 5...output terminal group, 6...output terminal, 7...
...Seal, 8...Horizontal alignment layer, 9...Probe, 9a...Permanent magnet, 11...Vertical alignment layer.

Claims (1)

[Claims] 1. A conductive film pattern having an output end is formed along the transparent substrates of the liquid crystal display cells disposed facing each other, and a large number of needle-like needles coated with a surfactant are formed in the liquid crystal material. When small pieces of magnetic material are dispersed and a plurality of touch entry sections are arranged in a part of the display area corresponding to the conductive film of the display cell, and a permanent magnet is brought close to any one of the sections. , with a touch entry so that a capacitance change signal is taken out at the output end of the corresponding conductive film pattern, and information specified by the section to which the permanent magnet is brought is displayed in the display area. LCD display device. 2. A large number of acicular magnetic particles coated with a dichroic dye are dispersed in the liquid crystal material of the liquid crystal display cell, and a plurality of touch entry sections are provided in a part of the display area of the display cell. Claims claim: When a permanent magnet is brought close to any one of the sections, information specified by the section to which the permanent magnet is brought is displayed in color in the display area. 1. The liquid crystal display device with touch entry according to 1.