JPH04287017A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To make the display screen easy to see when an AC power source can be utilized as the power source and suppress the power consumption when a battery is used by employing changeable battery unit constitution, and changing and mounting a back light type and a reflection type according to the situation. CONSTITUTION:A liquid crystal unit 1 displays information on the front display screen. A back unit 2 is separated from the liquid crystal unit 1 and attached to and detached from the liquid crystal unit 1 with coupling claws 3 provided on flanks. Two kinds of back unit, i.e., the back light type which uses the AC power source and the reflection type which uses the battery are prepared and freely changed by a user according to the use state. Consequently, the display screen information can be projected on a screen by placing only the liquid crystal unit 1 on an overhead projector.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device that displays information using liquid crystal.

0002

[Prior Art] A conventional liquid crystal display device that displays information using liquid crystal has an integrated structure of a liquid crystal unit for displaying information and a back unit that is a light source for emitting light from the liquid crystal. The structure makes it impossible to freely replace the back unit.

0003

[Problems to be Solved by the Invention] In the conventional liquid crystal display device as described above, there are two types of illumination methods for the back unit: a backlight type and a reflective type.The backlight type has low power consumption. Due to their large size, they are not suitable for use with batteries, while the reflective type consumes less power but has the disadvantage that the display screen is difficult to see due to the low amount of illumination. However, it is not completely satisfactory.

0004

[Means for Solving the Problems] A liquid crystal display device of the present invention includes a liquid crystal unit for displaying information, and a back unit that can be replaced and attached to the back of the liquid crystal unit, and in particular, the liquid crystal display device includes a liquid crystal unit that displays information and a back unit that can be replaced and attached to the back of the liquid crystal unit. It has a connecting claw.

[0005]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view showing one embodiment of the present invention.

In FIG. 1, a liquid crystal unit 1 displays information on a front display screen. The back unit 2 has a structure that is separate from the liquid crystal unit 1, and can be attached to and detached from the liquid crystal unit 1 using a coupling claw 3 provided on its side surface.

Two types of back unit 2 are available: a backlight type that uses AC power and a reflective type that uses batteries, and the user can freely replace them depending on the usage condition. be able to do so.

With this configuration, when an AC power source can be used as a power source, a backlight type back unit is installed to make the display screen easier to see, and when a battery is used as a power source, a reflective type back unit is installed. to reduce power consumption.

[0010] With this configuration, the display screen can also be projected onto the screen by placing only the liquid crystal unit 1 on the overhead projector.

[0011]

As explained above, the liquid crystal display device of the present invention uses an AC power source as a power source by making the back unit replaceable and installing the backlight type and reflective type interchangeably depending on the situation. This has the effect of making the display screen easier to see when available, and reducing power consumption when using batteries as a power source.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention.

[Explanation of symbols]

1 Liquid crystal unit 2 Back unit 3 Nails

Claims (2)

[Claims] 1. A liquid crystal display device comprising: a liquid crystal unit that displays information; and a back unit that can be replaced and attached to the back of the liquid crystal unit. 2. A liquid crystal display device comprising: a liquid crystal unit that displays information; and a back unit that has coupling claws on both sides and can be replaced and attached to the back of the liquid crystal unit.