JPH0331180A - Indicator for elevator - Google Patents

Abstract

PURPOSE:To widen a luminous area by connecting multiple LEDs and protective diodes on a substrate to obtain one display component. CONSTITUTION:Multiple LEDs 15 and protective diodes 14 are connected on a ceramic substrate 22 with bonding wires 30 to obtain one display component. The manufacturing cost of the display component is reduced, its luminous area is widened, and its illuminance is improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an elevator indicator that is installed in an elevator landing or inside a car to indicate floors, etc. The present invention relates to an elevator indicator suitable for use as an element.

[Conventional technology]

Conventionally, elevator indicators using light emitting diodes have been developed by connecting the light emitting diodes, protection diodes 1 to 1 and current limiting resistors individually with screws using special terminal blocks, as described in Japanese Patent Laid-Open No. 58-47782. They were connected by tightening to form a display unit for one floor.

[Problem to be solved by the invention]

2. The conventional technology uses a display dial for floors, etc. and light emitting diodes (
(hereinafter abbreviated as LED) were placed on the left and right, and the LEDs located right next to the display dial were lit. According to this method, the purpose can be sufficiently achieved by using at least one LED for each floor, and even if the LED, protection diode, and current limiting resistor are individually combined, There were no problems. However, from the viewpoint of design and visibility, the method of displaying the driving direction and floor position is to place a light emitting body on the back of the display board for floors, etc., and cut out the displayed characters and make the characters themselves emit light. Preference is given to those that make the display appear as if the characters are visible, or those that emit light around the displayed characters. To adopt this method, it is necessary to widen the light emitting area and turn on multiple LEDs at the same time to significantly increase the illumination intensity. For this reason, in the conventional method, installing multiple LEDs, protection diodes, and current limiting resistors individually requires a complicated structure and increases the construction cost. was not suitable.

Furthermore, even if the LED, protection diode, and current limiting resistor are soldered to a single printed wiring board, the number of copper foil wires connecting the LED, protection diode 1, and current limiting resistor increases, making it cheaper. In addition, the number of soldered parts increases, which increases the number of assembly steps, resulting in an expensive indicator.

SUMMARY OF THE INVENTION An object of the present invention is to provide an inexpensive and compact elevator indicator that has a large light-emitting area and a high-intensity LED for indicating floors, etc.

[Means to solve the problem]

The above object is achieved by connecting a plurality of LEDs and protection diodes onto a ceramic substrate by bonding to form one display component.

[Effect]

Since multiple LEDs and protection diodes are connected to a ceramic substrate by bonding to form a single display component, the display component itself can be manufactured at low cost, and the number of components mounted on a printed wiring board can be significantly reduced. Therefore, the number of man-hours for assembling the indicator can be significantly reduced.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

FIG. 1 is a front view of the elevator indicator.

1 is a display unit mounting frame, 2 is a box fixed with screws 3 and 3', 4 is a direction light name plate, and 5 is a floor display name plate.

Figure 2 shows the cross section n of the elevator indicator in Figure 1.
It is a figure showing -n. 6 is a transparent plate fitted from the back side to the floor display window of the mounting frame 1; 7 is a spacer for fixing the mounting frame 1 and the printed wiring board 10 at a certain distance;
8 is a display component that illuminates a floor display nameplate, etc.; 9 is a current limiting resistor; 11 is an external connection wiring material that connects the external connection connector 2 and the printed wiring board 1o; 13 is the mounting frame 1 and the printed wiring board 10 This is a screw that fixes the

FIG. 3 is a diagram showing an example of mounting a printed wiring board.

The printed wiring board 10 includes display components 8 for the number of floors plus direction lights, current limiting resistors 9 connected to a common power source for direction lights and a common power source for floor lights, and furthermore, for external connections. Wiring board 1
1 is soldered, and a direction light name plate 4 and a floor display name plate 5 are affixed to the surface of the display component 8, respectively.

FIG. 4 shows details of the display component 8. 21 is a heat dissipation fin, 22 is a ceramic substrate to which an LED and a protection diode are bonded, 23 is a resin coated with an LED and a protection diode, and 24 is a light diffusion sheet 1 to . 25 is a tube that insulates the terminal leads 26 and 27 drawn out from the ceramic substrate 22 and the heat dissipation fins; 28 is a tube that surrounds the ceramic substrate 22;
It is a house that focuses the light of ED.

FIG. 5 is a detailed diagram showing a state in which an LED and a protection diode are bonded to the ceramic substrate 22, where 14 is a protection diode, 15 is an LED, and 30 is each LED 1.
5, a protective diode 14, and a terminal lead.

FIG. 6 is a circuit diagram of a protection diode and an LED.

L E D 15 is configured by connecting four pieces in series so that the forward voltage between terminals 26 and 27 is as small as possible and the forward current also does not increase, and two sets of these are connected in parallel.
One protection diode 14 is connected between terminals 26 and 27 with a polarity opposite to that of the LED.

According to this embodiment, a display component consisting of a plurality of LEDs and a protection diode can be handled as a single component, and the number of copper foil wires connected on the printed wiring board can be reduced, so the light emitting area is large. It is possible to provide an inexpensive indicator with a high-intensity LED for indicating floors, etc.

Furthermore, LEDs with different luminescent colors can be combined to obtain an arbitrary luminescent color.

Furthermore, by providing heat dissipation fins on the ceramic substrate, it is possible to reduce the temperature rise of the LED, thereby making it possible to extend the life of the LED.

〔Effect of the invention〕

According to the present invention, since a plurality of LEDs and a protection diode can be treated as one component, it is possible to provide an inexpensive elevator indicator with a large light emitting area and high illuminance.

[Brief explanation of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a sectional view of an elevator indicator, FIG. 3 is a diagram showing an example of mounting a printed wiring board, FIG. 4 is a sectional view of a display component, and FIG. Figure 5 is LE
Detailed view of D and protection diode mounted ceramic substrate, No. 6
The figure is a circuit diagram of display components. 1...Mounting frame body, 2...Box body, 4 Directional light name plate, 57
one

Claims (1)

[Claims] 1. In an elevator indicator using light-emitting diodes, a plurality of the light-emitting diodes and one protection diode are connected to a ceramic substrate by bonding, and are incorporated into a house surrounding the ceramic substrate, A light diffusion sheet is attached to the opening of the house to configure a set of display components, and the display component, a current limiting resistor, and external connection components are soldered to a printed wiring board to configure a display unit, The display unit is fixed to the back side of a mounting frame having a window for displaying floors, etc., and a dial for displaying floors, etc. is pasted on the surface of the display component as necessary. An indicator for elevators. 2. The elevator indicator according to claim 1, wherein the light emitting diodes are configured to emit light of any color by combining light emitting diodes of different colors. 3. The elevator indicator according to claim 1, wherein the display component is constructed by attaching heat dissipation fins to the back surface of a ceramic substrate.