JPH0112723Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a light emitting display device used in electronic equipment and the like, and particularly to a light emitting display device used in conjunction with an operation button device.

[Prior art]

The channel selection section of a television receiver, video tape recorder, etc. is equipped with an operation button device equipped with a push switch and a light emitting display device that displays the selected program using a light emitting element such as a light emitting diode. Or it is provided in an integrated manner. A light emitting display device generally includes a display plate 1 as shown in FIG. Luminous display is performed by lighting up the numbers.

The display plate 1 is a transparent plate made of acrylic or the like, and as shown in the figure, numbers or letters are printed, for example, on the back side of the plate 1 with white blanks. Therefore, the number part remains transparent, but this is not desirable as the shape of the LED behind it can be seen. For this reason, in order to make the number part, and thus the back surface of the plate 1, semi-glossy and translucent, processing such as varnishing is performed by applying a medium of paint containing a diffusing agent. However, since these methods basically apply some kind of paint, uneven coating occurs,
The disadvantage was that this was visible when displayed and was unsightly.

[Purpose of invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a light emitting display device that is free from light unevenness in a display portion and is constructed with a small number of parts.

[Structure of the idea]

The present invention includes a display plate 1 in which a plurality of display objects are printed in two rows on a transparent plate, and a convex portion 2b provided with a plurality of square holes 2c serving as light guide means corresponding to each display object. A panel 2 to which the display plate is attached, a translucent or colored transparent plate 3 having a plurality of comb-like elastic pieces 3a on both sides, and a center of the transparent plate fixed to the center of the convex portion. an operation button biased and supported by the elastic piece;
a printed circuit board supporting light emitting elements corresponding to the plurality of display objects and a push switch operated by the operation button behind the light-transmitting plate;
It is characterized in that the support body prevents light leakage.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 2 is a sectional view of the light emitting display device and the operation button device. In the figure, 2 is a panel, 1 is a display plate,
3 is a transparent plate, 4 is a light emitting diode as a light emitting element, 5 is a push switch, and 6 is a printed circuit board to which the light emitting diode 4 and the push switch 5 are fixed, and is attached to the chassis side of the main body of the video tape recorder.

7 is an operation button, which includes a pressing part 7a and an operation protrusion 7b.
and a protrusion 7c that comes into contact with the back surface of the panel are integrally molded. The operation button 7 is biased and supported toward the panel 2 by the elasticity of the transparent plate 3. The tip of the pressing portion 7a of the operation button protrudes a little beyond the slot 2a of the panel 2, and is held in the state shown in the figure by the contact between the protrusion 7c and the back surface of the panel 2. By pressing the pressing portion 7a with a finger, the operation button 7 moves, and the push switch 5 is operated by the operation protrusion 7b.

The display plate 1 is basically the same as the conventional one, and is made of a transparent plate such as an acrylic plate with display items such as numbers corresponding to the channels printed in white on the back side. Therefore, the portion 1a is black and does not allow light to pass through, and the number portion 1b is transparent. The part 1c is a part where metallic paint is printed on the front side of the transparent plate to match the panel surface. As mentioned above, in the conventional example, after printing the display material on the back side of the display plate, a process such as varnishing was applied to make the back side of the display plate semi-transparent, but in the present invention, numbers etc. are printed on the display plate 1. It is only printed, and the number part 1b is left transparent. In the illustrated embodiment, the display plate 1 is fixed to the panel 2, but it may be freely exchangeable.

FIG. 3 is an exploded perspective view seen from the back of the panel. 2b is a convex portion provided on the back surface of the panel 2, and is provided with a plurality of square holes 2c serving as light guide means. A positioning protrusion 8 and a fixing hole 9 for the transparent plate 3 are provided at the center of the convex portion 2b. Close to the convex portion 2b, the panel 2 has a slot 2 into which the tip of the operation button 7 fits.
A is provided. Reference numeral 10 denotes a support body for fixing and supporting the transparent plate 3 to the convex portion 2b of the panel, and is screwed to the convex portion 2b. At this time, the projection 8 is fitted into the hole 3c of the transparent plate 3 and positioned. The support body 10 has the role of preventing light from leaking to areas other than the predetermined portions of the light emitting diode 4.

The light-transmitting plate 3 is a rectangular plate with predetermined incisions to form elastic pieces 3a corresponding to the number of operation buttons. Each elastic piece has a through hole 3b, and the operating protrusion 7b of the operating button 7 fits into the opening 3b, and the operating button 7 is positioned in the direction in which the operating button is arranged. It is biased and supported toward the panel 2. As mentioned above, since the number part of the display plate 1 is transparent, the light emitting diodes 4 behind it are visible, which is not desirable, so the transparent plate 3 made of polycarbonate, salt pepper, etc. is made semitransparent to scatter the light from the light emitting diodes 4. let

Furthermore, if the light-emitting diode is green and the light-transmitting plate 3 is colored red or the like at the material stage, light-emitting displays of different colors can be performed. In other words, it is possible to easily perform a light emitting display in which the color of light emitted by the light emitting diode is different from that of the light emitting diode.

[Effect of idea]

As described above, according to the present invention, when printing is performed on the display plate, the part on which ink is not applied remains transparent, and the operation button is attached to the operation button device provided behind the display plate. The transparent plate that supports the light is made of a semi-transparent or colored material, and the light from the light emitting element passes through the transparent plate to produce a luminescent display, which is effective because there is no risk of uneven display as in the conventional case. It is.

In addition, a plurality of operation buttons are biased and supported by a plurality of comb-like elastic pieces provided on the transparent plate, and a light emitting element and a push switch operated by the operation buttons are provided on the same substrate. At the same time, the light transmitting plate is fixed to a convex portion of the panel by a support member that prevents light from leaking to areas other than the predetermined portions of the light emitting element, and the light emitting display device can be constructed with a small number of parts. Configurable and valid.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a part of the display plate, Fig. 2 is a sectional view of the light emitting display device and the operation button device, and Fig. 3 is a sectional view of the light emitting display device and the operation button device.
The figure is also an exploded perspective view. Explanation of main drawing numbers: 1...Display plate, 2...Panel, 3...Translucent plate, 4...Light emitting element, 7...Operation button.

Claims (1)

[Scope of utility model registration request] The display plate has a display plate 1 in which a plurality of display objects are printed in two rows on a transparent plate, and a convex portion 2b provided with a plurality of square holes 2c serving as light guide means corresponding to each display object. Panel 2 to be attached
a translucent or colored transparent plate 3 having a plurality of comb-like elastic pieces 3a on both sides; a support for fixing the center of the transparent plate to the center of the convex portion; and the elastic piece. and a printed circuit board that supports behind the transparent plate the light emitting elements corresponding to the plurality of display objects and the push switch operated by the operation button, and A light emitting display device that prevents light leakage. .