JPH0622017A - Telephone set with back light - Google Patents

Abstract

(57) [Abstract] [Purpose] In a portable wireless telephone or a cordless telephone, a small number of LEDs uniformly illuminate the entire area of a keyboard and a liquid crystal display panel to simplify the configuration. [Structure] One light guide plate 3 that illuminates the entire area of the back surface of the keyboard 1 and the liquid crystal display panel 2 and an LED 4 that illuminates one part of this light guide plate 3 are provided, and only one light guide plate 3 and LED 4 are provided. The entire area of the keyboard 1 and the liquid crystal display panel 2 is illuminated from the back surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone device with a back light, which is used for a portable radio telephone, a cordless telephone, etc. and which illuminates a keyboard and a liquid crystal display panel (LCD) from the back side.

[0002]

2. Description of the Related Art Conventionally, in this type of portable radio telephone, cordless telephone, etc., the back surface of each of the two is individually illuminated so that the keyboard on which the dial keys are arranged and the liquid crystal display panel for displaying the telephone number and the like can be easily seen. ing. In this case, in order to illuminate the entire area of each of the keyboard and the liquid crystal display panel, a light guide plate is arranged on each of the back surfaces of the keyboard and the liquid crystal display panel, and an LED is arranged adjacent to each of the two light guide plates.

[0003]

As described above, in the above-mentioned conventional telephone device with a back light, since the light guide plate and the LEDs are arranged on the keyboard and the liquid crystal display panel, respectively, a large number of LEDs are required. was there.

The present invention solves such a conventional problem, and an excellent back light which uniformly illuminates the entire area of a keyboard and a liquid crystal display panel by one LED and a light guide member and can simplify the structure. The purpose is to provide a telephone device with a light.

[0005]

In order to achieve the above object, a backlit telephone device according to the present invention is capable of inputting a telephone number and selecting a function and illuminating written characters and symbols from the back side. A liquid crystal display panel, a light guide member arranged on the back surface for illuminating substantially the entire area of the keyboard and the liquid crystal display panel, and a light emitting element for illuminating one part of the light guide member. is there.

[0006]

With such a configuration, in the backlit telephone device of the present invention, the entire area of the keyboard and the liquid crystal display panel is uniformly illuminated from the back surface only by the light emitting element that illuminates one location of one light guide plate. The configuration is simplified.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a backlit telephone device of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows the configuration of the embodiment. In FIG. 1, 1 is a keyboard for inputting a telephone number and selecting a function, and illuminating filled-in characters and symbols from the back side. 2 is a content of an incoming call and a telephone number input and a function selection input from the keyboard 1 are displayed. Liquid crystal display panel, 3
Is a light guide plate arranged on the back surface for illuminating the entire area of the keyboard 1 and the liquid crystal display panel 2. Reference numeral 4 denotes an LED that illuminates one portion of the light guide plate 3 (corresponding to the light emitting element in the claims), 5 is a printed circuit board on which the LED 4 and components not shown are surface-mounted, and 6 and 7 are exterior bodies.

Next, the function of the configuration of this embodiment will be described. The LED 4 lights up, and this light is guided to the light guide plate 3
Guides in the direction of the arrow around the illuminated portion from the LED 4. The entire area of the keyboard 1 and the liquid crystal display panel 2 is illuminated by this light guide.

As described above, according to the above-described embodiment, the keyboard 1 and the liquid crystal display panel 2 are provided with only one light guide plate 3 and the LED 4 that illuminates one portion of the light guide plate 3 so that the keyboard 1 and the liquid crystal display panel 2 can be provided. The entire area can be illuminated from the back side.

[0011]

As is apparent from the above description, in the backlit telephone device of the present invention, the entire area of the keyboard and the liquid crystal display panel is covered from the back surface only by the light emitting element that illuminates one place of one light guide plate. It is uniformly illuminated and has the effect of simplifying its configuration.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the configuration of an embodiment of a backlit telephone device of the present invention.

[Explanation of symbols]

 1 keyboard 2 liquid crystal display panel 3 light guide plate 4 LED 5 printed circuit board 6, 7 exterior body

Claims (1)

[Claims] 1. A keyboard for inputting a telephone number and selecting a function and illuminating written characters and symbols from the rear surface, a liquid crystal display panel, and illuminating substantially the entire area of the keyboard and the liquid crystal display panel. A telephone device with a backlight, which includes a light guide member disposed on a back surface thereof and a light emitting element that illuminates one portion of the light guide member.