JPS5850427Y2 - illuminated keyboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an illuminated keyboard, in which the entire surface of the keyboard with push buttons is illuminated.

Conventionally, when illuminating the keyboard surface of a keyboard switch, it was necessary to direct the light incident from the light source placed on the side upwards as much as possible. Methods such as tilting the keyboard or tilting the bottom surface at a large angle to increase the amount of light reflected upwards were used, but even with the tilting method, it was difficult to effectively illuminate the keyboard surface in a way that made it easy to see. .

The present invention aims to eliminate the above-mentioned drawbacks by giving a slight inclination to the lower surface of a transparent light guide plate and forming a fluorescent surface using fluorescent paint on this surface. will be explained in detail with reference to the drawings.

FIG. 1 is a side view of the keyboard 1, in which 2 is a frame, 3 is an insulating substrate, and 4 is a push button provided through the hole 5b of the light guide plate 5. However, a switch corresponding to each push button is provided, and the light guide plate 5 is made of transparent acrylic resin, etc., and the lower surface 5a is slightly inclined as shown in FIG. 2, and the lower surface 5a is coated with fluorescent paint. A light surface 6 is formed.

Alternatively, as shown in FIG. 3, a slight recess may be provided on the lower surface 5a and filled with fluorescent paint.

Reference numeral 7 denotes a lamp for a light source, which is disposed in a cavity in the light guide plate 5, and the light beam is obliquely incident on the fluorescent surface 6, and it emits a colored light peculiar to the fluorescent paint used, for example, blue-green. Therefore, the light guide plate 5 also comes to exhibit a bluish-green color as a whole.

Incidentally, if the push button 4 is made of a transparent synthetic resin, the push button 4 also emits starlight at the same time.

At this time, since the lower surface 5a is slightly inclined, the light from the light source 7 effectively enters the fluorescent surface 6, so that the light guide plate 5 shines uniformly.

As mentioned above, the present invention allows the light from the light source to be effectively received by tilting the phosphorescent surface of the upper plate, that is, the light guide plate, and also allows the light emitted from the phosphorescent surface to be emitted in almost all directions. This has the remarkable effect of making the keyboard surface easier to see from any direction, and making it extremely easy to operate the device even when used in a dark place.

[Brief explanation of the drawing]

FIG. 1 is a side view of the keyboard according to the present invention, FIG. 2 is a side view of the top plate, FIG. 3 is a side view of another embodiment of the top plate, and FIG. 4 is a plan view of the keyboard. 1...Keyboard, 4...Push button, 5.
Curved top plate (light guide plate), 5a... bottom surface, 6...
...fluorescent surface, 7... light source.

Claims (1)

[Scope of utility model registration request] The top plate of the keyboard on which the push buttons are arranged is made of transparent synthetic resin, the lower surface of the top plate is slightly inclined, and a fluorescent surface made of fluorescent paint is formed on the inclined surface. An illuminated keyboard characterized by a light source placed on the thick side.