CN100428768C - Image acquisition device - Google Patents

Abstract

An image capturing device is used for capturing an image of at least one penetrating manuscript, wherein the penetrating manuscript is provided with an edge part and a central part. The image capturing device comprises a window glass and a positioning device which can be selectively placed on the window glass. The positioning device comprises a positioning element, and the positioning element comprises an accommodating space and a flange part. The containing space is used for placing the edge part of the transmission manuscript, and the flange part is used for enabling the central part of the transmission manuscript to be closer to the window glass.

Description

image capture device

technical field

The present invention relates to an image capture device for capturing at least one image of a transmissive manuscript, through positioning components in the image capture device, the transmissive manuscript is brought closer to the window glass to capture a clearer image .

Background technique

Due to the advancement of scanning technology, the demand and application of converting images obtained by photography into digital signal images is becoming more and more common. Currently, there are many transmissive document scanners on the market that convert these photographic images, such as negatives or slides, into digital images for consumers to purchase. The quality and clarity of images captured by such scanners have become important factors for consumers when purchasing machines.

However, the captured image quality and its sharpness are inextricably linked to the optics used by the scanner. Contact image sensors (contact image sensors, CIS) are commonly used in scanners that require fast start-up speed and thin bodies. However, compared with charge-coupled device (CCD), CIS has a smaller depth of field, so when scanning, the distance between the object to be scanned and the window glass must be minimized to obtain better scanning quality .

When the scanner scans negatives or slides, such transmissive manuscripts must be put into a fixed device (such as a negative cassette or a slide cassette) first, and then the fixed device can be put into the scanner for scanning. Conventional fixtures usually have a thickness that allows a considerable distance between the document to be scanned and the window glass. In addition, because there is a gap in the fixing device, the document to be scanned often moves in the fixing device, so that the captured image quality is affected during the scanning process.

In view of the above situation, it is necessary to provide an image capture device with positioning function, which can not only reduce the distance between the object to be scanned and the window glass, but also strengthen the positioning of the object to be scanned, so as to improve the quality of the captured image.

Contents of the invention

The present invention provides an image capture device for capturing at least one image of a transmissive document. The transmissive document is brought closer to the window glass by positioning elements in the image capture device to capture a clearer image.

The image capturing device of the present invention is used for capturing at least one image of a penetrating document, which includes a window glass and a positioning device located on the window glass. The positioning device includes a positioning element, which is a bar-shaped positioning element with a groove shape, and includes a receiving space and a flange portion. The accommodating space is used to place at least one edge portion of the penetrating manuscript, and the flange portion extends from top to bottom toward the window glass and is placed close to the central portion of the window glass to limit the center of the penetrating manuscript. The central part is closer to the window glass, so that the distance between the central part of the transmissive manuscript and the window glass is minimized to ensure the scanning quality.

The image capture device of the present invention also provides another positioning device, so that the edge of the penetrating document placed therein naturally lies flat on a first slope of the positioning device. The positioning device may also have a flange portion to fix the transmissive manuscript and a flange portion extending from top to bottom toward the window glass and placed close to the central portion of the window glass to limit the penetration of the transmissive manuscript. The distance between the central part and the window glass is minimized to ensure the quality of scanning.

Furthermore, the image capture device of the present invention also provides a positioning device, which may have two flanges, and a first flange is used to reduce the distance between the central part of the transmissive manuscript and the window glass. to the minimum, and a second flange portion is used to fix the edge portion of the transmissive manuscript, thereby ensuring the quality of scanning.

Description of drawings

FIG. 1 is a schematic diagram of an image capture device according to a first embodiment of the present invention;

FIG. 2a is a side view of the image capturing device according to the first embodiment of the present invention;

Figure 2b is a side view of the positioning element of the first embodiment of the present invention;

3 is a side view of an image capturing device according to a second embodiment of the present invention;

Figure 4a is a side view of a positioning device according to a third embodiment of the present invention; and

Fig. 4b is a side view of the positioning element of the third embodiment of the present invention.

Detailed ways

The present invention provides an image capture device for capturing at least one image of a transmissive document. The transmissive document is brought closer to the window glass by positioning elements in the image capture device to capture a clearer image.

FIG. 1 is a schematic diagram of an image capture device according to a first embodiment of the present invention. As shown in FIG. 1 , the image capturing device 10 of this embodiment includes a window glass 11 , a lower casing 12 , an upper cover 13 , a positioning device 15 and a positioning component 17 . The positioning device 15 and the positioning element 17 are arranged on the window glass 11 . When the lower housing 12 and the upper cover 13 are close together, the transmissive manuscript 19 is placed between the positioning device 15 and the window glass 11 for capturing the image of the transmissive manuscript 19 . The upper cover 13 can optionally have a light source for use when capturing images. The penetrating manuscript 19 can also be placed in the positioning element 17 at the same time for multiple manuscripts, so as to save the time for placing the manuscripts. Furthermore, placing multiple manuscripts at the same time can also make it easier to fix the manuscripts, reducing the probability of blurred captured images. The image capturing device of the present invention is preferably a scanner for capturing the image of the transmissive document. However, other image capture devices suitable for implementing the same function as the present invention are also included in the scope of the present invention.

FIG. 2a is a side view of the image capture device according to the first embodiment of the present invention. As shown in FIG. 2 a , the positioning element 17 in the image capture device 10 of this embodiment includes a receiving space 171 and a flange portion 173 . The accommodating space 171 of the positioning element 17 is used for accommodating the edge portion 191 of the transmissive document 19 . In the first embodiment, the flange portion 173 of the image capture device 10 further includes a first slope 175 adjacent to the receiving space 171 . The main function of the flange portion 173 is to make the central portion 193 close to the window glass 11 , and the main function of the first slope 175 is to limit the edge portion 191 of the transmissive document 19 . In the first embodiment, the flange portion 173 can be a rectangular block or a trapezoidal block. Fig. 2b is a side view of the positioning element of the first embodiment of the present invention. As shown in Figure 2b, the flange portion 173 may also have a guiding slope 177 to facilitate the penetrating manuscript 19 to enter the positioning device 15, and push the edge portion 191 so that the central portion 193 is closer to the window glass 11, thereby obtaining Better scan quality. The flange portion 173 also has a bottom surface 179 . Bottom surface 179 is a low friction surface that prevents damage to see-through manuscript 19 .

FIG. 3 is a side view of an image capturing device according to a second embodiment of the present invention. As shown in FIG. 3 , the image capturing device 10 of the second embodiment includes a positioning element 37 having a first slope 375 . When the transmissive manuscript 19 is placed on the positioning member 37 , the first slope 375 restricts the edge portion 191 of the transmissive manuscript 19 so that its central portion 193 is close to the window glass 11 . The positioning element 37 also includes a second slope 376 . The second slope 376 is used to fix the edge portion 191 of the transmissive manuscript 19 so that it naturally lies flat on the second slope 376 without shaking. However, in order to make the transmissive manuscript 19 more tightly close to the window glass 11 , the positioning member 37 further includes a flange portion 373 to press down the transmissive manuscript 19 . In this way, when image capture is performed, the distance between the central portion 193 of the transmissive document 19 and the window glass 11 is minimized, thereby achieving the effect of ensuring the quality of scanning. In the second embodiment, the flange portion 373 can be a rectangular block or a trapezoidal block. The flange portion 373 can also have a guiding slope, which is equivalent to the guiding slope 177 shown in FIG. The flange portion 373 also has a bottom surface, as opposed to the bottom surface 179 shown in Figure 2b. The underside is a low friction surface to avoid damage to the see-through manuscript 19 .

Please refer to FIG. 4a , which depicts a side view of a positioning device according to a third embodiment of the present invention. In the third embodiment, the image capture device 10 includes a window glass 11 , an upper cover 13 , a positioning device 45 and a positioning component 47 . The positioning device 45 and the positioning element 47 are arranged on the window glass 11 for capturing the image of the at least one transmissive document 19 . As shown in FIG. 4 a , the positioning element 47 includes a bottom 471 , a first flange portion 473 and a second flange portion 474 . The bottom 471 has sufficient thickness to match the first flange portion 473 and press down the central portion 193 so that the central portion 193 is flush with the bottom 471 . And the second flange portion 474 fixes the edge portion 191 of the penetrating manuscript 19 so that it is not easy to shake. When the positioning device 45 is placed on the window glass 11 , the distance between the central portion 193 and the window glass 11 is minimized to achieve the effect of ensuring the quality of scanning. In the third embodiment, the first and second flange portions 473 , 474 can be elongated squares or trapezoidal squares. Fig. 4b is a side view of the positioning element of the third embodiment of the present invention. As shown in FIG. 4 b , the first and second flange portions 473 , 474 may respectively have a guiding slope 477 , 478 to guide the transmissive document 19 into the positioning device 45 . The first and second flange portions 473, 474 also have a bottom surface 479, 480, respectively. Bottom surfaces 479 , 480 are low friction surfaces to avoid damage to see-through manuscript 19 .

Through the above detailed description of the preferred embodiments, it is hoped that the features and spirit of the present invention can be described more clearly, and the preferred embodiments disclosed above do not limit the scope of the present invention. On the contrary, the above descriptions and various changes and equivalent arrangements are within the protection scope of the present invention. Therefore, the claims scope of the application for the present invention should be interpreted in the broadest way based on the above description, and cover all possible equivalent changes and equivalent arrangements.

Claims (7)

1. An image capture device for capturing an image of at least one transmissive manuscript, the at least one transmissive manuscript has an edge portion and a central portion, the image capture device comprising: a window glass; and A positioning device, selectively located on the window glass, the positioning device includes a positioning element, the positioning element is a bar-shaped positioning element with a groove shape to define a receiving space and includes a flange portion, wherein The accommodating space is used to place the edge portion, and the flange portion extends from top to bottom toward the window glass and is placed close to the central portion of the window glass, so as to limit the central portion from approaching the window glass. 2. The image capture device as claimed in claim 1, wherein the flange portion has a first slope so that the edge portion is close to the positioning component. 3. The image capture device as claimed in claim 1, wherein the flange portion has a bottom surface. 4. The image capture device as claimed in claim 3, wherein the bottom surface is a low-friction surface to avoid damage to the at least one transmissive document. 5. The image capture device as claimed in claim 1, wherein the flange portion has a guiding slope to facilitate the at least one penetrating manuscript to enter the positioning device. 6. The image capture device as claimed in claim 1, wherein the flange portion is a long square. 7. The image capture device as claimed in claim 1, wherein the flange portion is a trapezoidal block.

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