JPS6245716B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a semiconductor light emitting device that emits emitted light in a direction parallel to a substrate surface.

(b) Prior art The use of light emitting diodes in copiers and printers has been known from Japanese Patent Publication No. 39-25849, etc., but Japanese Patent Application No. 50-60884 (Japanese Patent Application Laid-open No. 143334-1984) et al., it has been proposed to extract light from a light emitting diode in a linear manner. However, in devices that extract light by wiring light emitting diode elements on a substrate (for example, the above-mentioned applications and display devices), the structure is such that the emitted light is extracted in a direction perpendicular to the substrate surface, and the substrate is connected to a connector. When attaching the light emitting device to a light emitting device, etc., the light emitting device is moved parallel to the light emitting surface of the light emitting device. Therefore, when the mounting area is narrow, for example, when the space for mounting a light emitting device such as the above-mentioned printer, in which many components such as a charger, toner, and transfer device are placed facing each other on the photosensitive surface, is narrow, it is not possible to mount the light emitting device using a conventional light emitting device. .

For example, in the light emitting device shown in FIG.
is on the same surface as the printed wiring surface 3 of the board 2,
When attaching the board 2, it must be moved parallel to the light emitting surface 1 and attached to the connector, which is inconvenient, but furthermore, it becomes impossible to attach it if the attachment location is a narrow gap.

As a method to cover the above drawbacks, JP-A-51-
It is conceivable to use a pilot lamp type lamp like the one in Publication No. 110984, but please take into consideration the need to align the top surfaces of the lamps on the same plane and the need for a board or special connector for installation wiring to the drive circuit. This makes the installation work complicated and the overall configuration complicated. In addition, in special lamps (for example, floats), an inverted conical reflector is provided directly above the light emitting diode elements as in Japanese Utility Model Application No. 51-24866; It is extremely difficult to provide an inverted conical reflector and align the light from a plurality of light emitting diode elements in one direction.

(c) Problems to be Solved by the Invention The present invention improves the above-mentioned points and provides a substantially plate-like structure which has a very simple structure and directs the emitted light of the light emitting diode element in a line in a direction parallel to the substrate surface. A semiconductor light emitting device is provided.

(d) Means for solving the problem The present invention arranges a plurality of light emitting diode elements in the vicinity of one side of a substrate, and uses a light guide body or a plurality of light emitting diode elements that integrally covers the plurality of light emitting diode elements. A directivity imparting body is provided, which is a reflective frame having a substantially L-shaped cross section that covers the entirety while dividing each part.

(e) Function This allows the light from the plurality of light emitting diode elements to be uniformly aligned in one direction, and since the direction is parallel to the substrate surface, it is easy to install even in narrow spaces.

(f) Embodiment Figure 2 is a perspective view showing an embodiment of the present invention, and Figure 3 is a perspective view showing an embodiment of the present invention.
The figure is a sectional view taken along the line AA in FIG. 2. In the diagram 4
is a board having a printed wiring terminal 5, on which a light emitting diode element 6 is arranged and connected to the printed wiring terminal 5. Above board 4
A light guide 8 having a space 7 surrounding the light emitting diode element 6 is provided on top and fixed with an adhesive or the like. Light guide 8
The entire surface except the right side 9 is plated or coated with paint, and the light emitted from the light emitting diode element 6 is reflected and led out only from the right side 9. Since the terminals 5 are gathered on one side of the substrate 4 opposite to the right side surface 9 of the light guide, which is the light emitting surface, attachment to a connector etc. is easy.
If a plurality of light emitting diode elements are arranged and wired in series as shown in the figure and FIG. 4, which will be described later, the light from the right side surface 9 is extracted as a linear luminous flux.

If the back side of the light guide 8 is also plated with metal, the terminal 5 may be short-circuited, so the terminal surface and the light guide 8 should be provided on different sides of the board 4 using through holes or the like. It is desirable to do so. Further, as a structure for eliminating the space 7, a case corresponding to the plated or painted surface of the light guide 8 is provided, and a resin material is injected into the case to form the light guide.

FIGS. 4 and 5 are a perspective view and a sectional view taken along the line B-B of another embodiment. The same reference numerals are used for the same parts as in FIGS. 2 and 3.

In the figure, 10 is a reflective frame with a substantially L-shaped cross section, a light emitting diode element 6 is built in a space 7, and a case 1
The light is guided to the light emitting surface 12 of 1. Four light emitting diode elements 6 are arranged in a row along one side of the substrate 4, and a space 7 is provided for each light emitting diode element 6 one to one by partitions 15, 15. There is preferably a scattering sheet 13 on the inner surface of the case 11 to make the light uniform. Further protrusion 1
4 is provided to strengthen the connection with the reflective frame 10.

(G) Effects of the Invention As described above, the present invention includes a substrate having wiring, a plurality of light emitting diode elements arranged in an array near one side of the substrate, and a structure that covers the plurality of light emitting diode elements and parallel to the surface of the substrate. Since it is a semiconductor light emitting device equipped with a directivity imparting body such as a light guide or a reflective frame fixed to a substrate so as to guide reflected light in one direction,
Since the substrate surface and display surface are perpendicular, the area of the substrate can be increased even if the area of the light emitting surface is small.
It is also easy to attach and detach when inserting the light emitting device into a narrow space and attaching the board to a connector or the like.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional light emitting device, FIGS. 2 and 3 are perspective views and sectional views of an example of the present invention, and FIG.
5 are a perspective view and a sectional view showing another example of the present invention. 4 is a substrate, 6 is a light emitting diode element, 8 is a light guide, and 10 is a reflective frame.

Claims (1)

[Claims] 1. A board having a terminal made of printed wiring connected to a light emitting diode element, a plurality of light emitting diode elements arranged along the side surface of the board where no terminals are provided, and the plurality of light emitting diode elements integrated into one. A light emitting surface having a length approximately equal to that of the substrate corresponding to the plurality of light emitting diode elements is provided near the side surface of the substrate so that a substantially linear luminous flux is obtained by guiding the emitted light in one direction parallel to the surface of the cover substrate. 1. A semiconductor light emitting device comprising: a directivity imparting body consisting of a light guide having a light reflecting surface on its surface or a reflecting frame having a substantially L-shaped cross section, which is positioned and fixed to a substrate.