JPS6134540Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is used in illuminated push button switches, panel display devices, etc. by housing a light emitting element in a condenser.
The present invention relates to a light emitting display device that emits light in different colors depending on information, and particularly relates to a light emitting display device that emits light with uniform brightness.

FIGS. 1 and 2 are diagrams for explaining the outline of the present invention. In Figures 1 and 2, 11
is a condensing body made of transparent synthetic resin and formed into a substantially conical shape, and this condensing body 11 includes two sets of light emitting elements 12, _{12 1} , 12 2 , 13 , 12 1 , _{12 2} , 13 , 13
₁ , 13, _{and 2} are buried, and the light emitting elements 12, 12 are embedded so that each set emits light in a different color.
₁ and 12 ₂ are light emitting diodes that emit red light, and the light emitting elements 13, _{13 1} and 13 ₂ are light emitting diodes that emit blue light. Light emitting diodes that emit light in the same color, that is, light emitting diodes 12
₁ and 12 ₂ and 13 ₁ and 13 ₂ are connected in series as shown in FIG.
They are arranged alternately and equidistantly around the axis X. 14,14 ₁ ,14 ₂ ,15,15 ₁ ,15
Lead terminal pieces ₂ are electrically connected to each set of light emitting diodes 12 and 13, and are led out of the light condensing body 11.

In the above configuration, when the switch 16 shown in FIG. 3 is placed in the solid line position, the illumination surface 17 of the condenser 1 is illuminated in red, and when the switch 16 is placed in the chain line position, the illumination surface 17 is illuminated in blue. be done. The above light emitting diodes 12 ₁ and 12 ₂ and 13 ₁ and 1
By connecting 3 ₂ in series, it is possible to obtain sufficient brightness compared to the case of using one light emitting diode, and furthermore, the light emitting diodes 12 ₁ , 12 ₂ , 13 ₁ and 13 ₂ emit light in the same color.
Since they are arranged alternately around the axis X of the light condenser 11, uneven light emission does not occur on the illumination surface 17 when the switch 16 is switched. The light emitting diodes 12 ₁ and 12 ₂ and 13 ₁ and 13 ₂ may be connected in parallel as shown in FIG. 4, and in that case, compared to the case where one light emitting diode is used,
It is possible to improve the withstand voltage. In addition, in FIGS. 3 and 4, 18 indicates each light emitting diode 1.
This resistor 18 is integrated with the lead terminal pieces 14 and 15 to which the light emitting diodes 12 and 13 are die-bonded via an insulating layer 19, as shown in FIG. This can be easily formed by vapor deposition or the like.

FIG. 6 shows an embodiment of the present invention, in which a large number of light emitting diodes can be set as a light condenser. That is, in FIG. 6, the lead terminal pieces 14, _{14 1} - 14 ₄ are electrically connected to the light emitting diodes 12, 12 ₁ - 12 ₄ and the lead terminal pieces 14, _{14 1 - 14 4 are electrically connected to the light emitting diodes 13, 13 1} - 13 ₄ . By setting the lead terminal pieces 15, 15 ₁ to 15 ₄ at different levels as shown in Fig. 7, the diode 1
A step D is provided on the installation surfaces of 2, _{12 1} to 12 ₄ and 13, 13 ₁ to 13 ₄ . The step D may be formed by bending the lead terminal pieces 14 and 15.

When the number of light emitting diodes 12 and 13 increases,
Each lead terminal piece 14, 14 has a processing limit in its dimensions.
₁ to 14 ₄ , 15 and 15 ₁ to 15 ₄ interfere with each other, making it difficult to install the light emitting diodes 12 and 13. However, by providing the step D between both terminal installation surfaces as described above, each light emitting diode 2,
3 is easier to install. Furthermore, in this case, by installing a red light emitting diode 12 that emits a warm color and a relatively high brightness on the low side, and a blue light emitting diode 13 that emits a cool color and a relatively low brightness on the high position side, The brightness of both the light emitting diodes 12 and 13 on the illumination surface 17 becomes equal, and visibility is improved. Of course, even when adding a light emitting diode that emits light in a different color, it is sufficient to provide a step D on the element installation surface in the same manner as described above.

FIGS. 8a and 8b show an example in which the above-described light emitting display device is applied to an illuminated push button switch, in which a light emitting surface of a light condenser 11 is embedded with a light emitting diode 12 that emits red light and a light emitting diode 13 that emits blue light. 17, a translucent operation cover 20 is arranged to be movable up and down, and a changeover switch 22 of a diode drive circuit 21 is linked to this cover 20, and this switch 22 allows the drive circuit 21 to be connected to the lead terminal 14. , 15. For example, when the operation cover 20 is not operated, the light emitting diode 12 emits light as shown in FIG.
As shown in the figure, the light emitting diode 13 emits light, and blue color is visible from the surface 23 of the cover 20. Information can be selected based on the difference in the emitted light color.

FIGS. 9a and 9b show still another example of application, in which a large number of condensing bodies 11, 11 ₁ to 11 _o are arranged vertically and horizontally to display a desired pattern 24 in color. In this case, as shown in FIG. 9a, for example, if the pattern 24 is set to emit red light against the blue base 25, and in FIG. 9b, the pattern 24 is set to emit blue light against the red base 25. , the same pattern 24 can be displayed with the color of the base 25 reversed depending on the type of information. Of course, by arranging the condensing bodies 11 vertically and horizontally, the patterns 24 can be arranged on the substrate 2 according to the type of information, as shown in FIGS. 10a and 10b.
Not only will the color of pattern 5 be reversed, but pattern 2 will also be displayed in reverse.
It is also easy to change the shape of 4 itself.

According to this invention, when a plurality of light emitting elements that emit light in the same color are made into one set, and the plurality of light emitting elements that emit light in different colors for each set are housed in a substantially conical body with a thickened end, The element installation surfaces of the lead terminal pieces on which the light emitting elements are installed are arranged with steps between each set, making it easy to arrange multiple light emitting elements and making it possible to arrange them according to the brightness of each light emitting element. This allows the brightness of each light emitting element to be maintained evenly, improving visibility.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the outline of the present invention, Figure 2 is a sectional view taken along line 2-2 in Figure 1, Figures 3 and 4 are electrical circuit diagrams, and Figure 5 is a resistor. FIG. 6 is a plan view showing an embodiment of the present invention, and FIG.
The figure is a sectional view taken along the line 7-7 in Figure 6, Figures 8a and 8b are schematic diagrams showing application examples of the same light emitting device in different operating modes, and Figures 9a and 9b are diagrams showing other applications. Plan views showing examples, Figures 10a and 1
Figure 0b is a plan view showing still another example of application. 11... Light collector, 12, 13... Light emitting element, 1
4, 15... Lead terminal piece, 17... Lighting surface, 2
0... Operation cover, 21... Light emitting element drive circuit,
22...Selector switch, D...step, X...axis center.

Claims (1)

[Claims for Utility Model Registration] (1) Multiple light emitting elements that emit light in the same color
A plurality of sets of light emitting elements, each set emitting light in a different color, are housed in a condenser made of a translucent resin and consisting of a substantially conical body with a thickened end;
A light-emitting display element in which each set of light-emitting elements is connected in series or in parallel, and each set of light-emitting elements is arranged alternately around the axis of the light condenser, wherein the light-emitting element is installed on one end. 1. A light-emitting display element, characterized in that lead terminal pieces are arranged with a step difference between each set on the element installation surface, and each other end of the lead terminal is guided out of the light condenser. (2) The light-emitting display element according to claim 1, which is a utility model, and is formed by arranging a large number of the light condensers in a matrix to display a color pattern. (3) A translucent operation cover is arranged to be movable up and down in correspondence with the illumination surface of the light collector, and light is emitted to the lead terminal pieces of each set of light emitting elements via a changeover switch that is linked to this cover. A light emitting display element according to claim 1 or 2 of the utility model registration claim, which is connected to an element driving circuit.