CN1168293C - Image pick-up device for small size document - Google Patents

Abstract

A small-sized document image capture device can capture images of small-sized reflective and transparent documents, and its structure includes: a housing, a document fixing seat, a light source device, a lens, a surface charge-coupled device, and a control circuit. The surface charge-coupled device is used to capture the entire surface image of the document at the same time, so as to achieve the function of quickly capturing the document image, and a document fixing frame is used to facilitate the image capture of the document, which has the advantages of simple structure and convenient operation.

Description

Image Capture Device for Small Size Documents

The present invention relates to an image capture device for small-sized reflective manuscripts and transparent manuscript documents, in particular to an image capture device using area charge-coupled devices for image capture.

For today's information users, they have entered the so-called Multi-Media era from the relatively monotonous text mode. Multimedia means data including text, image, sound and so on. In order to display data in a multimedia form, various multimedia devices capable of capturing images or sounds have been developed.

For image input devices, scanners and digital cameras are relatively common devices at present. Flatbed Scanner is a more commonly used scanner, which is used to pass some documents to be scanned, such as penetrating documents (such as transparencies) or reflective documents (such as photos or paper) through the scanning process. converted into digital data. Generally speaking, the photoelectric conversion modules used in flatbed scanners may be: charge-coupled devices or contact image sensors (Contact Image Sensor-CIS). The flatbed scanner is used to convert the document placed on the glass platform into a digital form through the scanning process and input it into a personal computer for further use.

However, as far as the existing flatbed scanner is concerned, the photoelectric conversion module used in it is a line CCD (line CCD). Although the application of this line CCD can achieve higher resolution, it has the following disadvantages:

(1) Transmission device is required: During the scanning process, this kind of flatbed scanner configured with line CCD needs to scan the documents to be scanned one by one. That is to say, an additional transmission device is needed to make the line CCD or the document to be scanned advance or retreat in the scanning direction, which will increase the manufacturing cost and hardware space of the scanner; and

(2) Time-consuming scanning process: As mentioned above, this kind of flatbed scanner configured with linear CCD will scan the documents to be scanned one by one, so the scanning process will be time-consuming. Therefore, for users who only scan small-sized documents and do not need very high resolution, such as capturing films or headshots, using a general scanner is not only time-consuming, but also costs a lot.

The object of the present invention is to provide a small-size document image capture device with fast image capture speed and simple structure. The image capture device uses a surface-type CCD to scan small-size documents, so as to quickly capture document images and reduce costs. function.

The purpose of the present invention is achieved by providing an image capture device for small-sized documents for capturing images of small-sized transparent manuscripts and reflective manuscripts. The image capture device includes: a housing with At least one opening; at least one document fixing seat, located in the aforementioned housing, and fixing the aforementioned documents inserted into the aforementioned housing through the aforementioned opening; a light source device having a light-emitting element, which can be switched to the first position that provides the aforementioned penetrating manuscript light source and a second position for providing the light source of the aforementioned reflective manuscript; a lens to focus the optical image transmitted from the aforementioned document; a one-sided charge-coupled device to convert the optical image focused by the aforementioned lens into an electrical signal; and a control circuit to The aforementioned electrical signal is converted into a digital signal and transmitted to a connected computer host.

The present invention also provides an image capture device for small-sized documents, which is used to capture images of small-sized transparent and reflective documents. The image capture device includes: a housing with at least one opening; at least one document The fixing seat is located in the aforementioned housing, and fixes the aforementioned document inserted into the aforementioned housing through the aforementioned opening; a first light source device is located at the first position to provide the aforementioned penetrating manuscript light source; a second light source device is located at the second The position is used to provide the light source of the aforementioned reflective manuscript; a lens is used to focus the optical image reflected by the aforementioned reflective manuscript and transmitted through the aforementioned transparent manuscript; a one-sided charge-coupled element is used to convert the optical image focused by the aforementioned lens into an electrical signal; and, a control circuit, converting the aforementioned electrical signal into a digital signal, and transmitting it to a connected computer host.

The advantage of the device of the present invention is that it utilizes a surface-type CCD to capture the entire image of the document at the same time, which can achieve the function of quickly capturing the image, and uses a document fixing frame to facilitate the insertion or removal of the document from the aforementioned housing. It has a structure The advantages of simplicity and convenient operation.

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

Figure 1 is a top perspective view of a preferred embodiment of the present invention, wherein the light source is in a first position;

Figure 2 is a top perspective view of a preferred embodiment of the present invention, wherein the light source is in a second position;

Fig. 3 is the exterior view of the preferred embodiment of the present invention;

Fig. 4 is the structural diagram of the preferred embodiment file fixed frame of the present invention;

Figure 5 is a top perspective view of another embodiment of the present invention.

Please refer to FIG. 1 and FIG. 2 , which respectively show a top perspective view and an appearance view of the small-sized document image capture device of this embodiment. It can be seen from this figure that this embodiment includes: a housing 110 with an opening 120 (see FIG. 3 ); a document holder 130 located inside the housing 110 for fixing a document 140 inserted into the housing 110 through the opening 120; the document 140 Can be a kind of penetrating manuscript, for example: negative film, slide etc., also can be a kind of reflective manuscript, for example: photo etc.; Light source device 160, has light-emitting element 163, can be switched to the first position 161 (referring to Fig. 1) , to provide an appropriate light source when the document 140 is a penetrating manuscript, and the second position 162 (refer to FIG. 2 ), to provide an appropriate light source when the document 140 is a reflective manuscript; the lens 170 focuses on reflection and transmission through the document 140 The transmitted optical image; the surface type CCD 180 converts the focused optical image of the lens 170 into an electrical signal; and the control circuit 190 (such as a printed circuit board) converts the electrical signal into a digital signal and transmits it to the computer mainframe 100.

Please refer to FIG. 3 and FIG. 4 , the image capture device further includes a file fixing frame 150 for fixing the file 140 . The length L of the file fixing frame 150 is greater than the height H of the housing 110, so that the user can directly take out or insert the file fixing frame 150 into the housing 110.

In addition, as shown in FIG. 3 , the above-mentioned document fixing seat 130 can also use an ejection mechanism 131 to eject the fixed document fixing frame 150 out of the housing 110 , which is convenient for users to take out. And the formation of above-mentioned ejection mechanism 131 can refer to the ejection mechanism of 3.5 " disk drive.

The above-mentioned light source device 160 also has a moving mechanism 164 for moving the light emitting element 163 to the first position 161 and the second position 162 to respectively provide light sources for capturing images of the document 140 as transparent drafts and reflective drafts. The entire image capture device is connected from the control circuit 190 to the host computer 100 through the transmission line 191 , as shown in FIG. 3 .

To capture the image of the document 140 , first place the document 140 on the document fixing frame 150 , and then insert it into the casing 110 through the opening 120 . Next, the moving mechanism 164 is adjusted to switch the light emitting element 163 to the first position 161 or the second position 162 , so as to provide the light source required for image capture when the document 140 is a transparent draft or a reflective draft. After the light source is transmitted or reflected by the document 140, it is then focused on the area CCD 180 by the lens 170, and the entire surface image of the document 140 can be captured at the same time, and converted into digital image data by the control circuit 190. The digital image data is transmitted to the host computer 100 via the transmission line 191, and displayed on the screen by the driver software, or stored as a file for subsequent use.

In this embodiment, a moving mechanism is used to switch the position of the light-emitting element to provide the light source required for scanning the transmissive manuscript and the reflective manuscript, and the image of the entire surface of the transmissive manuscript or the reflective manuscript can be captured simultaneously by using an area CCD. The structure of the image capturing device is simplified, and the function of quickly capturing images is achieved.

In addition, according to the above-mentioned image capture device, the light source device can also be changed to use two sets of light source devices 200, 210, as shown in FIG. A movement mechanism is required to switch the position of the light emitting element.

The present invention uses an area CCD to scan documents to capture images of the documents, and its characteristic is to capture the optical images of the documents to be scanned at one time and convert them into electrical signals. Thus, the present invention does not need to have a forward/reverse actuator in the scanning direction, unlike the line CCD used in the conventional art. Therefore, there is an advantage of saving hardware space. And because the area-type CCD captures the optical images at one time, instead of capturing them one by one, it has the advantage of increasing the scanning speed. This creation can also provide good resolution for small-sized files (slides, films or headshots, etc.). About 450dpi resolution. The invention cooperates with the file fixing frame to fix the files to be scanned so that the files can be inserted into or taken out of the casing conveniently, and has the advantages of simple structure and convenient operation.

In summary, although the present invention is disclosed above in conjunction with preferred embodiments, it is not intended to limit the present invention. Any skilled person can make various modifications and modifications without departing from the spirit and scope of the present invention. , so the scope of protection of the present invention should be regarded as defined by the appended claims. For example, in order to make the light source average, a symmetrical light source device can be added.

Claims (11)

1. An image capture device for small-sized documents, used to capture images of small-size penetrating manuscripts and reflective manuscript documents, said image capture device comprising: a housing with at least one opening; at least one document holder, located in the housing, for securing the document inserted into the housing through the opening; A light source device having a light-emitting element switchable between a first position for providing the transmissive light source and a second position for providing the reflective light source; a lens focusing the optical image transmitted by said document; a one-sided charge-coupled device that converts the optical image focused by the lens into an electrical signal; and A control circuit converts the electrical signal into a digital signal and transmits it to a connected computer host. 2. The image capture device as claimed in claim 1, further comprising a document fixing frame for fixing the document, and the frame can be inserted and removed from the opening of the casing. 3. The image capture device as claimed in claim 2, wherein the length of the document fixing frame is greater than the height of the casing. 4. The image capture device as claimed in claim 2, wherein the document holder has an ejection mechanism for ejecting the fixed document frame from the casing. 5. The image capture device as claimed in claim 1, wherein the light source device further has a moving mechanism for moving the light emitting element to the first position and the second position. 6. The image capture device as claimed in claim 1, further comprising a transmission line connected to the computer host. 7. An image capture device for small-sized documents, used to capture images of small-size penetrating and reflective documents, the image capture device comprising: a housing with at least one opening; at least one document holder, located in the housing, for securing the document inserted into the housing through the opening; A first light source device, located at the first position, for providing the penetrating manuscript light source; A second light source device, located at the second position, used to provide the light source for the reflective manuscript; a lens for focusing the optical image reflected by the reflective manuscript and transmitted through the transmissive manuscript; a one-sided charge-coupled device that converts the optical image focused by the lens into an electrical signal; and, A control circuit converts the electrical signal into a digital signal and transmits it to a connected computer host. 8. The image capture device as claimed in claim 7, further comprising a document fixing frame for fixing the document, and the frame can be inserted and removed from the opening of the casing. 9. The image capture device as claimed in claim 8, wherein the length of the document fixing frame is greater than the height of the casing. 10. The image capture device as claimed in claim 8, wherein the document holder has an ejection mechanism for ejecting the fixed document frame from the casing. 11. The image capture device as claimed in claim 7, further comprising a transmission line connected to the computer host.

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