JPH0824332B2 - Image reader - Google Patents

Description

TECHNICAL FIELD The present invention relates to an image reading device, for example, a device for reading an image by an electronic camera or the like.

[Conventional technology]

Regarding the conventional image reading apparatus of this type, an apparatus having excellent operability was disclosed by the inventors of the present application in Japanese Patent Application No. 60-17608.
Proposed / disclosed in Issue 3. FIG. 4 shows a perspective view of an example thereof. Reference numeral 1 is a device main body substrate, and 2 is a photoelectric conversion unit for inputting an optical image signal of a document / object which is an image to be read placed on a placing plate 4 and converting it into an electric signal, that is, an electronic camera. It is a department. Reference numeral 3 is a support member for supporting the camera unit 2.

As the color of the mounting plate 4, white or achromatic gray was selected. These colors are mainly used for the following reasons. That is, 1) The above-mentioned example device is of a reflection illumination type, but in order to make it possible to directly use originals and images for a device of a type that uses transmitted illumination (for example, an overhead projector etc.), and 2) In order to enable the placing plate to be imaged when adjusting the white balance of the camera unit 2.

[Problems to be solved by the invention]

However, in the conventional example as described above, for example, when a three-dimensional object is placed on the mounting plate 4 having the above-described color, the shadow of the three-dimensional object is reflected on the surface of the mounting plate 4, There is a tendency that the output image of the camera 2 becomes difficult to see.

Further, as shown in FIG. 5, when the illumination device 5 is used to supplement the light amount on the mounting plate 4, the shadow 7 of the three-dimensional object 6 becomes more clear, and the output image of the camera 2 is output. It had the drawback of deteriorating the quality of.

The present invention has been made by paying attention to the problems of the conventional example as described above. In addition to eliminating the above-mentioned drawbacks, the white balance adjustment is not hindered, and a good output image is obtained even in the case of a three-dimensional object or an overhead projector. It is intended to provide this main image reading device.

[Means for solving problems]

Therefore, in the present invention, a mounting plate for mounting an image to be read, a photoelectric conversion unit for converting an optical signal of the image to be read into an electrical signal, and the photoelectric conversion unit are supported. In the image reading device including a support member for illuminating the read image placed on the mounting plate from above, the mounting plate has different colors on the front and back sides. In addition, the front and back surfaces are configured so that they can be used in reverse, and are different when white balance adjustment is performed or when a transparent original is used as the read image and when a three-dimensional object is used as the read image. It is intended to achieve the above-mentioned object by configuring the surface to be used.

With the above configuration, by properly using both sides of the mounting plate, it is possible to favorably perform white balance adjustment, input of a transillumination type original or a three-dimensional object.

〔Example〕

 Hereinafter, the present invention will be described based on examples.

FIGS. 1 (a) and 1 (b) are perspective views of a front surface and a back surface of an embodiment of a mounting plate 4 of an image reading apparatus according to the present invention, and FIGS. 2 and 3 respectively. The perspective view of each usage example of the image reading device when the front side / back side of the above-mentioned mounting plate is used properly is shown. In FIGS. 1 to 3, the same or corresponding constituent elements as those in FIGS. 4 to 5 of the above-mentioned conventional example are represented by the same (corresponding) symbols, and the duplicated description is omitted.

(Structure) A feature of the present invention is that the mounting plate 4 is mounted on the mounting plate 4 as shown in FIGS.
As shown in Fig. 4, the reference line 4b is formed symmetrically with respect to the center line, and a pair of symmetrical protrusions 4a is formed at one side edge portion to form
As shown in the figure, the support member 3 can be positioned, and the front side / back side 4b, 4d of the mounting plate 4 can be reversed and used in colors different from whitish / blackish colors, respectively. .

(Operation) With the above-described configuration, the main mounting 4 plate uses the front side and the back side separately as follows. That is, 1) when adjusting the white balance or when using an original for a transillumination device such as an overhead projector, use the whitish front side 4w of the mounting plate 4 as shown in FIG. To do. Reference numeral 8 denotes a transparent original placed on the front side 4w.

2) On the other hand, in the case of photographing an object such as a three-dimensional object 6 that easily causes a noticeable shadow due to the lighting device 5, as shown in FIG. By using 4d as the front side, the shadow 7 of the three-dimensional object 6 can be made inconspicuous and the output image of the camera unit can be easily improved.

〔The invention's effect〕

As described above with reference to the embodiments, according to the present invention, different colors on the front and back sides of the mounting plate can be reversed and used properly, so that white balance adjustment,
It is possible to input data effectively for both transmissive illumination originals and three-dimensional objects with shadows.

[Brief description of drawings]

1 (a) and 1 (b) are front / back side perspective views of an embodiment of a mounting plate of an image reading apparatus according to the present invention, and FIGS. 2 and 3 show the mounting plate of FIG. Each usage example, FIG. 4 is a perspective view of an example of a conventional image reading apparatus, and FIG. 5 is a perspective view of the usage example. 1 ... Device substrate 2 ... Photoelectric conversion unit 3 ... Support member 4 ... Mounting plate 4w / 4d ... Front / back side

Claims (1)

[Claims] 1. A mounting plate for mounting an image to be read, a photoelectric conversion unit for converting an optical signal of the image to be read into an electric signal, and a unit for supporting the photoelectric conversion unit. In the image reading device including a supporting member and an illumination unit for illuminating the image to be read placed on the mounting plate from above, the mounting plate is formed with different colors on the front and back sides. In addition, the front and back surfaces are configured so that they can be used in reverse, and different surfaces are used for white balance adjustment or when a transparent original is used as the read image and when a three-dimensional object is used as the read image. An image reading device characterized in that: