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Exposure head and an image forming apparatus

An exposure head and image technology, which is applied in the fields of electric recording process applying charge pattern, optics, equipment of electric recording process applying charge pattern, etc., can solve the problems of lower resolution, inability to obtain resolution, and larger lens pitch.

Inactive Publication Date: 2009-07-22
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the above-mentioned configuration in which the lenses are arranged at predetermined intervals in the longitudinal direction (first direction), if the diameter of the lenses is increased, the pitch of the lenses in the longitudinal direction (first direction) becomes large, which may not be possible. get the desired resolution
That is to say, in the prior art, there is a case where the resolution decreases while increasing the amount of light incident on the lens.

Method used

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  • Exposure head and an image forming apparatus
  • Exposure head and an image forming apparatus
  • Exposure head and an image forming apparatus

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no. 1 approach

[0073] image 3 It is a diagram showing an example of an image forming apparatus equipped with a line head to which the present invention is applied. in addition, Figure 4yes means image 3 A diagram of the electrical configuration of the image forming apparatus. This device is an image forming device capable of selectively executing a color mode and a monochrome mode in which four colors of black (K), cyan (C), magenta (M), and yellow (Y) are combined. The monochrome mode is a mode in which only black (K) toner is used to form a monochrome image. also, image 3 It is a figure corresponding to the execution of the color mode. In this image forming apparatus, when an image forming command is given from an external device such as a host computer to a main controller MC having a CPU, a memory, etc., the main controller MC gives a control signal and the like to an engine controller EC, and sends a The HC gives video data VD corresponding to the image forming command. In ad...

no. 3 approach

[0124] In addition, in Figure 14In the shown structure, the lens LS-u (first lens, second lens) and the lens LS-m (third lens) are connected to each other, the distance between the lens LS-u and the lens LS-m will not be enlarged, and the lens LS-u can be connected to the lens. A lot of light is incident. In addition, lens LS-m (first lens, second lens) and lens LS-d (third lens) are connected to each other, and a large amount of light can enter the lens without increasing the distance between lens LS-m and lens LS-d. In other words, Figure 14 The structure is a structure capable of suppressing the width of the lens array 299 in the width direction LTD (second direction). As a result, space saving can also be achieved in the width direction LTD in the area where the light emitting elements 2951 are arranged corresponding to the lenses LS on the head substrate 293 . Therefore, in the head substrate 293 on which the light emitting element 2951 is arranged, spaces can be lef...

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Abstract

An exposure head, includes: a lens array (299) that includes a light transmissive substrate (2991) whose length W1 in a first direction (LGD) is greater than a length W2 thereof in a second direction orthogonal to the first direction, a first lens (LS11) that is arranged on the light transmissive substrate (2991), and a second lens (LS12) that is arranged on the light transmissive substrate (2991) at the first direction (LGD) of the first lens (LS11), the first lens (LS11) and the second lens (LS12) being connected in the first direction (LGD), thereby providing a technology capable of making a large amount of light upon the lens and realizing excellent exposure.

Description

technical field [0001] The present invention relates to an exposure head and an image forming apparatus using a lens array in which a plurality of lenses are arranged. Background technique [0002] As such a lens array, for example, the lens array of Patent Document 1 is known figure 2 etc., a structure in which a plurality of lenses are arranged at a predetermined pitch in the longitudinal direction. In this lens array, lenses adjacent to each other in the longitudinal direction are arranged at predetermined intervals, and each lens forms an image of incident light. Then, the light formed by each lens exposes a latent image carrier such as a photoreceptor drum to form a latent image. [0003] Patent Document 1: JP-A-6-278314 Gazette [0004] In addition, from the viewpoint of performing good exposure, it is preferable that the amount of light incident on the lens is large. Therefore, for example, enlarging the diameter of the lens is considered. However, in the above-m...

Claims

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Application Information

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IPC IPC(8): B41J2/447G03G15/00
Inventor 小泉龙太野村雄二郎宗和健
Owner SEIKO EPSON CORP
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