JPH0711743B2 - Electronic device display - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device of an electronic device used for illuminating a display section of the electronic device.

Prior Art FIGS. 5 and 6 show the configuration of a conventional display device.

In these figures, 1 is a case of an electronic device, 2 is a display plate, which is provided on the operation surface of the case 1 and is usually made of a transparent acrylic resin or the like. 3 is a printed circuit board, 4 is a lamp for a light source attached to a part of the printed circuit board, 5 is a switch, and 6 is a button as an operation member for operating the switch 5, which penetrates the hole 2a of the display board 2. It protrudes to the front and the user can press it from the front. A volume 7 is attached to the printed circuit board 3, and a knob 7b is fitted to the tip of the shaft 7a. Characters and symbols are often printed on the surface 7c of the knob 7b or in the vicinity 7d of the knob 7b of the case 1. A concave portion 2b is provided at one end of the display plate 2, and a hole 2c for allowing the shaft 7a to pass therethrough is provided at the other end. Further, letters and symbols 2e required for the solid printing portion 2d corresponding to each button 6 are provided on the back surface.
Is printed.

Next, the operation of the above conventional example will be described. Display board 2 of case 1
Adhesive portions 1a, 1b are provided at the portions of the case 1 corresponding to the ends of the display panel 2, and the display plate 2 is adhesively fixed to the case 1, and the recessed portion 2b of the display plate 2 is provided by the light emission of the lamp 4 provided on the printed circuit board 3. The guide plate 2 is used as a guide to guide the light to the axis 7a of the button 6 or the volume 7 to illuminate the button 6 and the letters / symbols 2e of the solid printing portion 2d, and the knob of the volume 7 through the hole 2c. The area around 7b is also illuminated.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described conventional display device, the display plate 2 must be mounted inside the case 1, and therefore, a large mounting space for the display plate 2 is required and the display described on the display plate is required. There was a problem that was hard to see.

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned problems of the prior art and to provide a display device which can be thinned and therefore has a small mounting space and high contrast.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention uses a light source provided inside a case of an electronic device, a part of which is inserted inside the case and the other part of which is an operation surface of the case. It is configured such that it is guided to the operation surface of the mounted display plate, and both the operation member and the display printed on the back surface of the display plate on the operation surface are illuminated by the guided light emission.

Function The present invention, which is configured as described above, has an effect that the space for mounting the display plate can be reduced and the print can be illuminated with good contrast.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, 11 is a case of electronic equipment made of plastic material, 12 is a plate-shaped display plate made of a transparent material such as acrylic resin, 13 is a boss provided in front of the case 11, 14 is a boss. 13 is a screw for fixing the printed circuit board 3, 15 is integrally formed with the case 11, and a recess is provided on the operation surface of the case 11 and has a depth close to the display plate 12, 16 is a through hole 16a and has a black color or the like. A sheet of light-shielding plastic material, 17 is a projecting hole for engagement provided in the periphery of the display plate, 18 is a small hole corresponding to the small hole 17, and is a small hole provided in the side wall of the recess 15 of the case 11, 19 is an air layer , 20 is a small hole, 21 is a projecting piece, 12a is a through hole for the button 6, 12b
Is a groove with a triangular cross section, 12c is a circular hole through which the shaft 7a passes, and 15a
Is a hole for engagement provided at one end of the recess 15, 12d is a constricted stepped portion of the display plate 12 corresponding to the hole 15a, and 12e is a fixed end.
The same reference numerals as those in FIGS. 5 and 6 represent the same names. FIG. 4 is a reference diagram for explaining the shapes of the display plate 12 and the sheet 16.

Next, the operation will be described. First, a method of fixing the display plate 12 will be described. As shown in Fig. 3, insert the display plate 12 into the case 11
Insert the fixed end 12e into the 15a (a), rotate the display plate 12 so as to press the stepped portion 15a against the fulcrum (in the direction of the arrow) (b), and set the protrusion 17 as the engaging means to a small size. The holes 18 are engaged (C). At this time, the side wall 15b of the recess 15 bends slightly due to the elasticity of the plastic and opens to the outside, and the projection 21 is made into a small hole.
Engage 20. At this time, the elasticity of the display plate 12 is utilized to facilitate the engagement and give a click feeling. Next, the display operation when the display plate 12 is fixed in the recess 15 will be described. The light emitted from the lamp 4 mounted on the printed circuit board 3 enters the display plate 12 at the concave groove 12b and is divided into two parts along the surface of the display plate 12, one of which extends from the circular hole 12c to the space. By radiating the light, the periphery of the knob 7b is illuminated to make it easy to see the characters on the surface 7c or the vicinity 7d of the knob 7b even in a dark place. On the other hand, the other light is the stepped portion 12d.
Switch 5 that has entered recess 15 at the
The button 6 of is illuminated from the inside. Further, on the back surface of the display plate 12 in the vicinity of the button 6, the characters / symbols 12e of the display in various colors printed corresponding to the button 6 are provided behind the sheet 1
Due to the presence of a thin air layer 19 between 6 and the character / symbol 2e and the solid printing portion 2d provided on the same surface as in the conventional example, the character / symbol 12e and the background are different from each other. It has the effect of increasing the contrast between. The effect of the sheet 16 has been experimentally confirmed.

EFFECTS OF THE INVENTION As described in the above embodiments, according to the present invention, the light emission of the light source inside the case is configured to be guided to the operation surface of the case by the display plate which also serves as the light guide of the simple structure. The mounting space for the display board can be reduced. Moreover, since the air layer is provided between the display plate and the light-shielding sheet, the light illuminating the display plate can be uniformly distributed to a long distance by the air layer. Further, the air layer has an effect that the printing on the back surface of the display plate can be clearly seen day and night, and the positions of buttons and the like can be clearly seen even at night.

[Brief description of drawings]

FIG. 1 is a sectional view of a display device of an electronic device according to an embodiment of the present invention, FIG. 2 is a front view thereof, FIG. 3 is an explanatory view for explaining a fixing operation of a display plate, and FIG. 4 is a display. FIG. 5 is an exploded view of an essential part for showing the structure of the plate and the sheet, FIG. 5 is a sectional view showing the structure of a conventional display device, and FIG. 6 is a front view thereof. 4 ... Lamp, 5 ... Switch, 6 ... Button, 7 ...
Volume, 11 ... Case, 12 ... Display plate, 12a ... Through hole, 12b ... Recessed groove, 12c ... Circular hole, 15 ... Recessed portion, 15a ...
Hole, 16 ... sheet.

Claims (1)

[Claims] 1. A recess provided in an operation surface of a case of an electronic device, and a light-shielding sheet provided in front of the recess,
A plate-shaped display plate that is provided on the front surface of the sheet through an air layer and has a printed back surface that can guide light; an operation member that is provided through the sheet and the display plate; And a light source that guides light to the display plate.