JP2002050777A - Aggregate type light-receiving/emitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique related to general-purpose receiving/ transmitting parts of energy-saving display illumination or high-speed optical communication. SOLUTION: This device where a light guide plate where light guides surrounded by reflection faces are lined up and a light-receiving plate where light receiving/emitting elements are lined up are integrated. The light guide is tapered to the side of the light-receiving/emitting element, and the light guide and the light-receiving/emitting element are lined up on the same optical axis. The light guide plate is of a structure with protuberant light guides being lined up. The electrode on the side of light reception and emission of the light- receiving/emitting element is arranged around the light-receiving/emitting face, and it is desirable that the end face part of the light guide and the light- receiving/emitting part of the light-receiving/emitting element be connected with each other. It is desirable that the joint be sealed with a flexible light transmitter. It is desirable that the light-receiving/emitting device be of a structure such that not only full-surface use but also partial surface use be made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collective light emitting / receiving device in which a plurality of light receiving / emitting elements are arranged in an array, and relates to a novel technology for lighting, an electric display panel, a surface light emitting / receiving plate, and the like.

[0002]

2. Description of the Related Art At present, fluorescent lamps, electric bulbs and the like are generally used in the field of lighting, but since these consume a large amount of energy, more efficient lighting is required. Recently, an organic EL has been proposed as an energy-saving light-emitting device. However, at present, there is a problem that the organic EL is weak to moisture, and there is a considerable problem in practical use. In the display field, small-sized display devices in which light-emitting diode (LED) lamps are arranged are used in transportation and the like, but they also have poor power consumption efficiency and directivity. Furthermore, the performance of a current liquid crystal display device that can be used indoors is limited, and a display device that can read clearly outdoors is required.

[0003] Energy saving measures have become a matter of concern in many countries, and measures have been called for. For example, in Japan, as measures to prevent global warming based on the UN resolution, the Ministry of International Trade and Industry has begun studying related industries through the use of LEDs for lighting and the use of PD for solar power generation. In order to meet this demand, there is an urgent need to develop a general-purpose and highly efficient light source that emits visible light and a highly efficient solar cell.

[0004] In the information communication field, the development of a high-speed communication network is an urgent issue. In order to support the rapid spread of various information networks, particularly the Internet, generalization of optical communication systems is essential. In the current optical communication network, a quartz fiber is laid and used only for a part of a trunk system. Recently, studies on practical use of a system using a cheap and simple plastic optical fiber (POF) have become active. In the conventional quartz fiber communication, an expensive confidential sealing component is mainly used as the light receiving and emitting component, and development of an inexpensive general-purpose product that can be used in ordinary households required for future POF communication is desired.

[0005] In order for many people to use optical communication in a company or a general home, a device for separating and condensing external and internal signal lights and connecting them, and a collective light emitting and receiving device are required. Optical semiconductors used in optical communication applications include semiconductor lasers (L
D, VCSEL, etc.) and a photodiode (PD).

[0006]

SUMMARY OF THE INVENTION The present invention relates to a light-emitting device which is useful on a global scale, is efficient and inexpensive, and is useful for energy-saving display lighting and high-speed optical communication useful for preventing global warming. It is intended to provide technology related to general-purpose receivers and transmitters that are useful for dissemination.

[0007]

SUMMARY OF THE INVENTION The present invention proposes a collective light-emitting / emitting semiconductor device which effectively emits and emits visible light and infrared light. By connecting the light guide having an efficient light reflection shape to the light receiving / emitting surface of the light receiving / emitting element and forming the light receiving / emitting element and the light guide as an assembly, a low cost, multi-purpose collective type receiver is provided. A light-emitting device is provided.

According to the present invention, in a device in which a light guide plate in which light guides surrounded by a reflection surface are arranged and a light receiving and emitting plate in which light receiving and emitting elements are arranged are integrated, the light guide is directed toward the light receiving and emitting element side. A collective type light receiving / emitting device having a tapered shape, wherein the light guide and the light receiving / emitting element are arranged on the same optical axis.

According to a second aspect of the present invention, the light guide plate has a structure in which convex light guides surrounded by a reflecting surface are arranged and arranged, and the convex light guide is provided inside the light reflective hollow metal. 2. The collective type light emitting / receiving device according to claim 1, wherein the light receiving / emitting device is manufactured by a method of filling the surface or a method of reflecting the outside of the convex light transmitting body.

According to a third aspect of the present invention, the light emitting / receiving side electrode of the light emitting / receiving element is arranged on the outer periphery of the light emitting / receiving surface, and the tip of the light guide is connected to the light emitting / receiving section of the light receiving / emitting element. A collective type light emitting / receiving device according to claim 1 or 2.

According to a fourth aspect, in the third aspect, the light guide and the light receiving / emitting element are connected with a flexible transparent material interposed therebetween.

According to a fifth aspect of the present invention, there is provided the collective type light receiving / emitting device according to any one of the first to fourth aspects, wherein the light guide plate and the light receiving / emitting plate are flexible.

According to a sixth aspect of the present invention, the light emitting and receiving device is used not only for the entire surface but also for a plurality of units from one unit (one set of the light guide and the light emitting and receiving element). 6. A structure that can be used.
The collective type light receiving and emitting device according to any one of the above.

When an optical semiconductor is used for illumination and display purposes, and when an optical semiconductor is used for spectral or condensing purposes in optical communications, it is necessary to use a planar assembly type. This is to satisfy the requirements for brightness, character display, and multiple connections.

In order to improve the light receiving / emitting efficiency, it is necessary to attach a light guide to the optical semiconductor and align the optical axes of both parts.

The light guide plate preferably has a shape in which convex light guides are arranged and arranged in view of industrial and workability. The convex light guide can be manufactured by filling the light reflective hollow metal with a light transmissive body or reflecting the outside of the convex light transmissive body. For example, it is manufactured by pressing a reflection-treated metal plate to make it hollow, and filling the inside with a light transmitting body, or by injection-molding a light-transmitting resin in a convex shape, and reflecting the outside thereof. Examples of a processing method for making the light guide surface light-reflective include plating, PVD (evaporation, sputtering, etc.), CVD, and the like.

As the light transmitting body, any resin can be used as long as it transmits light having a desired wavelength. Examples of the light transmitting body include polycarbonate, polymethyl methacrylate, polycyclopentadiene, polyurethane, polystyrene, polyether, and the like.
Examples thereof include thermosetting or thermoplastic transparent resins such as epoxy and silicone and derivatives thereof.

In order to improve the light transmission efficiency between the light emitting / receiving element and the light guide, it is important to prevent the signal light from leaking and to join the light emitting / receiving element and the light guide at the shortest distance. That is, it is effective to connect the light emitting / receiving section of the light emitting / receiving element and the end face of the light guide on the light emitting / receiving element side. For this purpose, it is preferable to arrange the light emitting / receiving side electrode of the light emitting / receiving element on the outer periphery of the light emitting / receiving surface.

It is desirable that a flexible transparent material be connected between the end face of the light guide and the light receiving / emitting element in terms of stress and airtightness. Suitable resins include silicones, acrylics, epoxies, thermoplastic elastomers, and derivatives thereof. Commercial products can be selected from product catalogs such as Shin-Etsu Chemical Co., Toshiba Silicone, Toagosei, Nippon Kayaku, and Asahi Kasei.

The light guide plate and the light receiving / emitting plate are preferably flexible. With flexibility, the collective light emitting and receiving device of the present invention can be attached to a corner or a curved surface of a pillar.

Further, the light emitting and receiving device is not only used for the entire surface,
It is preferable that it can be partially used or cut and separated for use. Thereby, it is possible to cope with a case where the mounting place is restricted (large and small area and special shape).

FIG. 1 is a view showing an example of an external view of a surface light emitting / receiving device according to the present invention. The light guide plate 1 in which the light guides 3 are arranged and arranged is integrated with the light receiving / emitting plate 4.

FIG. 2 is a sectional view showing an example of the collective light emitting and receiving device according to the present invention. (1) is a diagram after integration,
(2) is a diagram before integration. A light guide plate 21 in which light guides 23 surrounded by a reflection surface 22 are arranged and arranged;
The light emitting and receiving plate 24 in which are arranged on the circuit boards 20 and 26 is integrated. The end face of the light guide and the light receiving / emitting surface 27 of the light receiving / emitting element are connected. The inside of the light guide is filled with a light transmitting body.

FIG. 3 is a sectional view showing another example of the collective light emitting and receiving device according to the present invention. 2 differs from FIG. 2 in the shape of the light guide, the manufacturing method, and the mounting method of the light receiving / emitting element. 31 is a light guide plate, 32 is a reflection surface, 33 is a light guide, 34 is a light receiving / emitting plate,
35 is a light emitting / receiving element, 36 is a circuit board, 37 is a light receiving / emitting section,
38 is a gold wire, and 39 is a sealing resin.

[0025]

Embodiments of the present invention will be described. Hereinafter, specific examples will be described.

[0026]

Embodiment 1 A collective light receiving device as shown in FIG. 2 was manufactured as follows. 1. Production of Light Guide Plate A transparent plate having conical projections 23 was processed by injection molding using polymethyl methacrylate resin as a raw material, and then the conical portion was subjected to reflection treatment 22 by plating. Thereby, the light guide plate 21 in which the convex light guides were arranged was obtained.

2. Manufacture of light receiving plate An electric circuit is etched on a polyimide film circuit board (manufactured by Sumitomo Metal Mining) 20, a light receiving passage hole is punched, and
(Hamamatsu Photonics) 25 was mounted to prepare a film carrier. Next, a circuit board 26 was formed by bonding an insulator having a PD storage hole formed thereon to a copper-clad laminate for single-sided printed wiring (manufactured by Risho Kogyo) having processed electric wiring. Finally, the light receiving plate 24 was manufactured by bonding the film carrier and the storage substrate. The light receiving section 27 was sealed with a flexible epoxy-based transparent resin (manufactured by Nippon Kayaku).

3. Production of Collective-Type Light-Receiving Device The light-guide plate 21 and the light-receiving plate 24 were integrated while aligning the optical axes of the light guide and the PD to produce a collective-type light-receiving device. The external shape is as shown in FIG.

When this collective light receiving device was used for an optical sensor component of a high-speed rotary press, the positional accuracy was remarkably improved.

[0030]

Example 2 A collective light emitting device as shown in FIG. 3 was manufactured as follows. The reflective surface 32 was processed by pressing the glossy metal film, and the inside thereof was filled with a transparent silicone resin (manufactured by Shin-Etsu Chemical Co., Ltd.) as the light guide 33 to manufacture the light guide plate 31. Next, after processing an electric circuit on a flexible circuit board (manufactured by Shindo Electronics) 36, a light emitting passage is drilled, further mounting of an RC-LED (manufactured by Infineon) 35, connection of a gold wire 38, and formation of an insulating resin (manufactured by Namics) 39. Sealing was performed to produce a light emitting plate such as 34. The light emitting section 37 was sealed with a transparent silicone resin used as a light guide. Thereafter, the light guide plate and the light emitting plate were integrated to produce a collective optical device.

When this collective light emitting device is used as a character display component, the amount of information is several times as large as that of a conventional display device, and a clear display in several steps is possible.

[0032]

The present invention proposes a collective type light receiving / emitting device having high light input / output efficiency. By connecting a plurality of light guides and a plurality of light receiving / emitting elements, it can be used at low cost for multipurpose use. It is intended to provide a simple surface light emitting and receiving device.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a light emitting and receiving device of the present invention.

FIG. 2 is a diagram showing an example of a light emitting / receiving device (cross section) of the present invention.

FIG. 3 is a diagram illustrating an example of a light emitting / receiving device (cross section) of the present invention.

[Explanation of symbols]

 1, 21, 31 Light guide plate 22, 32 Reflective surface 3, 23, 33 Light guide 4, 24, 34 Light emitting / receiving plate 25, 35 Light emitting / receiving element 20, 26, 36 Circuit board 27, 37 Light emitting / receiving surface 38 Gold wire 39 sealing material

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 5C096 AA00 AA21 BA04 CC06 CD04 CD22 FA01 5F073 AB02 AB25 BA01 FA29 5F088 AA01 BA16 BA20 BB01 BB10 EA04 JA14

Claims (6)

[Claims] In an apparatus in which a light guide plate in which light guides surrounded by a reflection surface are arranged and a light receiving and emitting plate in which light receiving and emitting elements are arranged are integrated, the light guide tapers toward the light receiving and emitting element side. Wherein the light guide and the light receiving / emitting element are arranged on the same optical axis. 2. The light guide plate has a structure in which convex light guides surrounded by a reflection surface are arranged and arranged, and the convex light guide fills a light reflective hollow metal with a light transmitting body. 2. The collective light emitting / receiving device according to claim 1, wherein the light emitting / receiving device is manufactured by a method of performing reflection processing on the outside of the convex light transmitting body. 3. A light receiving / emitting element of the light receiving / emitting element is arranged on an outer periphery of a light receiving / emitting surface, and a light emitting / receiving element of the light receiving / emitting element is connected to a front end of the light guide on the light receiving / emitting element side. The collective type light emitting / receiving device according to claim 1 or 2, characterized in that: 4. The collective type light receiving / emitting device according to claim 3, wherein the light guide and the light receiving / emitting element are connected via a flexible transparent material. 5. The collective type light emitting / receiving device according to claim 1, wherein the light guide plate and the light receiving / emitting plate have a flexible structure. 6. A structure in which the light emitting and receiving device can be used not only for the entire surface but also for one unit (a set of a light guide and a light emitting and receiving element), which is partially used or cut and separated in a plurality of units. The collective type light emitting / receiving device according to any one of claims 1 to 5, characterized in that: