JPH069367B2 - Multi-chip type image reader - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a multi-chip type image reading apparatus configured by arranging a plurality of linear image sensors in a staggered pattern.

[Technical background of the invention]

Conventionally, a linear image sensor is constructed as shown in FIG. 3, for example. In the figure, 11 is a photosensitive portion that generates a signal charge according to the amount of incident light, and 12 is the photosensitive portion 11
The storage unit for temporarily storing the signal charge generated in step S13, the shift unit 13 for transferring the signal charge stored in the storage unit 12 to the charge transfer unit 14, and the reference numeral 15 the signal charge of the charge transfer unit 14 Is an output unit for converting into an electric signal corresponding to and sequentially outputting. It should be noted that reference numerals 16 and 17 are position marks indicating specific positions of the linear image sensor chip 10.

FIG. 4 shows an image reading apparatus in which a plurality of the linear image sensors shown in FIG. 3 are arranged in a zigzag pattern. 18 is a linear image sensor 19 ₁ , 19 ₂ ,
19 _3, ... in the substrate to install, alignment marks ₂₀ 1 of the linear image sensor on the substrate 18, ₂₀ 2, 2
0 ₃ , ... Are provided. Then, each sensor 19 ₁ ,
Position marks 16 ₁ , 17 ₁ , 16 of 19 ₂ , 19 ₃ , ...
₂ , 17 ₂ , ... And the installation marks 20 ₁ , 2 on the substrate 18
Positioning is performed by aligning the X coordinates with 0 ₂ , 20 ₃ , ..., X ₁ , X ₂ , X ₃ , ..., and each sensor 19 ₁ , 19 ₂ , 19 ₃ , ... is installed on the substrate 18. ing.

[Problems of background technology]

Meanwhile, as shown in Figure 5 an enlarged area A indicated by hatching in the Figure 4, the linear image sensor 19 ₁
Of the photosensitive pixels 21 ₁ , 21 ₂ , and 2 of the photosensitive portion 11 ₁ in
1 _3, ... and linear image each photosensitive pixel ₂₂ 1 of the photosensitive portion 11 ₂ of the sensor 19 _2, 22 2, 22 _3, ... the X coordinate, in order to perform consecutive _read, x _{1, x} 2, x
It must match exactly as shown in ₃ . But,
As described above, when the alignment is performed by the position mark of the sensor and the placement mark of the substrate, the alignment between the pixels is indirectly performed, and there is a drawback that the accuracy is deteriorated.

[Object of the Invention]

The present invention has been made in view of the above circumstances,
The purpose is to provide a multi-chip type image reading device in which a plurality of linear image sensors are arranged in a staggered manner on a substrate, and the alignment accuracy of each linear image sensor can be improved. It is to provide a device.

[Outline of Invention]

That is, the multi-chip type image reading apparatus of the present invention is provided with a photosensitive portion which is linearly arranged and generates a signal charge according to the amount of incident light, and which is provided on a chip at a predetermined pixel position in the photosensitive portion. At least two position marks, a charge transfer portion for reading the signal charge generated from the photosensitive portion, and a signal charge read from the charge transfer portion is converted into an electric signal corresponding to the charge amount. Each linear image sensor is aligned by having a plurality of linear image sensors each provided with an output section for outputting and an arrangement mark, and aligning the arrangement mark and the position mark corresponding to the pixel position of the linear image sensor. And a plurality of linear image sensors provided in a staggered arrangement.

Example of Invention

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a linear image sensor used in the multi-chip type image reading apparatus of the present invention. First
In the figure, the same components as those in FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted. That is, the position marks 23 and 24 are provided on the chip 10 at the predetermined pixel positions N ₁ and N ₂ in the photosensitive portion 11.

FIG. 2 shows an image reading apparatus constructed by staggering the plurality of linear image sensors shown in FIG. On the substrate 25, the placement marks 26 ₁ , 26 ₂ ,
26 ₃ , ... Are provided, and the placement marks 26 ₁ ,
26 ₂ , 26 ₃ , ... And each linear image sensor 27 ₁ ,
27 ₂ , 27 ₃ , ... Position marks 23 ₁ , 24 ₁ , 23
The X coordinates X ₁ , X ₂ , X ₃ , ... With ₂ , 24 ₂ , ... Are aligned. That is, assuming that the position marks 23 and 24 are the marks M ₁ and M ₂ , respectively, the odd-numbered linear image sensor mark M ₁ (or the mark M ₂ ) and the even-numbered mark M ₂ (or the mark M ₁ ) are formed on the substrate. It is adapted to the same X coordinate on 18.

According to such a configuration, since the position mark corresponding to a predetermined pixel position and the position mark of another sensor are directly aligned, highly accurate alignment is possible.

〔The invention's effect〕

As described above, according to the present invention, in a multi-chip type image reading apparatus configured by staggering a plurality of linear image sensors on a substrate, the alignment accuracy of each linear image sensor can be improved. A chip type image reader is obtained.

[Brief description of drawings]

FIG. 1 is a block diagram of a linear image sensor used in a multi-chip type image reading apparatus according to an embodiment of the present invention.
FIG. 2 is a block diagram of a multi-chip type image reading device according to an embodiment of the present invention, FIG. 3 is a block diagram of a conventional linear image sensor, and FIG. 4 is a block diagram of the linear image sensor of FIG. FIG. 5 is an enlarged block diagram showing a part of FIG. 4 described above in an enlarged scale. 10 ... Chip, 11 ... Photosensitive area, 12 ... Storage area, 13
...... Shift unit, 14 …… Charge transfer unit, 15 …… Output unit,
18 ... substrate, 23, 24 ... position mark.

Claims (1)

[Claims] 1. A photosensitive section comprising a group of pixels arranged linearly and generating a signal charge according to the amount of incident light, and at least two position marks provided on a chip corresponding to predetermined pixel positions in the photosensitive section. A charge transfer section for reading out the signal charge generated from the photosensitive section, and an output section for converting the signal charge read out from the charge transfer section into an electric signal corresponding to the amount of the electric charge and outputting the electric signal. Each of the linear image sensors has a plurality of linear image sensors and alignment marks, and the alignment marks are aligned with the position marks corresponding to the pixel positions of the linear image sensor. A multi-chip image reading device, comprising: an image sensor; and substrates arranged in a staggered pattern.