JPH0316751A - Led head - Google Patents

Abstract

PURPOSE:To improve airtight properties by mounting a glass container in a groove provided on a base board and mounting a light guide lens inside the glass container. CONSTITUTION:On a base board 1, a large number of LED elements 2 are arranged and surrounded with a recessed groove 3 for protecting the LED elements 2 from an outside air. Inside a glass container 4 to be nested in the recessed groove 3, a light guide lens 6 for condensing lights emitted from the LED array elements 2 is mounted at the both ends of the glass container 4 by fixtures 5 as an integral structure. This is nested into the recessed groove 3 of the base board 1, the nested part and thereabounts is sealed with a resin, and an outside air is interrupted. In this structure, the LED array elements are protected from an outside air and kept airtight. In this manner, the LED array can be sealed airtight, and the reliability thereof can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a print head for a printer, and in particular to a print head for a printer.
Regarding the structure of the array element (L, El) head.

[Conventional technology]

Conventionally, this type of LEI (LEI) ED head has a structure in which the airtight method used to protect the LEI (LEI) array element from the outside air is poor and lacks reliability.

[Problem to be solved by the invention]

The structure of the conventional LEI head described above does not have a structure that makes the LED array element airtight, and therefore has the disadvantage that the reliability of the element is poor and defects occur. [Means for Solving the Problems] The LEL) head of the present invention has LELs arranged on a base substrate.
EI) In order to protect the play element from the outside air, St is provided on the base substrate, a glass container is attached to this groove, and a light guide lens is attached to the inside of this glass container.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a plan view thereof. A large number of LEL elements 2 are arranged on the base substrate 1, and a recess # to protect the LED elements 2t from the outside air.
$3 is placed around it. Furthermore, on the inside of the glass container 4 that enters the concave groove 3, there are light guiding lenses 6 such as self-focusing fibers (Selfoc lenses) that direct the light emitted from the LED array element 2 at both ends of the glass container 4. It forms an integral structure that is attached to the fixture 5, and this is inserted into the concave groove 3 of the base @1! The surrounding area of the LED array element is sealed with resin (not shown) to block outside air, thereby protecting the LED array element from the outside air and maintaining air ffi. [Effects of the Invention] As explained above, the present invention provides a concave groove on a base substrate in order to protect a large number of LED array elements arranged on a base substrate from the outside air, and a Selfoc lens is integrally formed in this concave groove. By placing it in a glass container and coating its surroundings with resin, the LED array can be hermetically sealed and its reliability can be improved. Concave groove, 4...Glass container, 5...Mounting tool, Wock lens.

Claims (1)

[Claims] In an LED head in which a large number of LED elements are arranged on a base substrate and the light emitted from these elements is exposed to a drum via a light guide lens, the entire element is covered with a glass container, and the light guide lens is attached to the glass container. An LED head characterized by an integrated structure.