CN1168043C - Scanning device capable of being connected to projection device to display scanned image - Google Patents

Abstract

A scanning device capable of being connected to a projection device to display a scanned image is characterized in that a scanning module of a scanner scans a file to obtain image data, a central processing unit of the scanner is controlled through a user interface, and a signal processing unit, a memory and an output unit controlled by the central processing unit can operate. After the image data is processed by the signal processing unit and the memory, the image data is matched with a video buffer area to act, and finally the image data is output to the projection device by the output unit for a user to use, so that the configuration and the processing between the scanner and the projection device are simplified, and the use is simpler and more convenient.

Description

A scanning device that can be connected to a projection device to display scanned images

                      

The invention relates to a scanner, in particular to a device which can be connected to a projection device to display scanned images.

Background technique

Usually when we do conference presentations, we often need to use projection equipment to explain and illustrate data. According to the needs of users, projectors can be divided into two types: "optical projectors" and "liquid crystal projectors". LCD projectors can be connected to notebook computers to display various effects that can be done on computers. It is currently the most common way to make presentations.

A general liquid crystal projector is used to project the data on the computer onto the screen. When using an LCD projector, as long as there is a computer and the electronic file to be projected, the data of the electronic file can be easily projected onto the screen.

However, when the data to be displayed by the user is not an electronic document, the document data can be printed on the transparencies by means of photocopying, and then projected on the screen by an optical projector. Alternatively, the scanner can also be used to scan the file data to the computer for processing, and then perform projection through the connection between the computer and the liquid crystal projector.

Both transparencies and optical projectors are used to display document data, and transparencies must be used. In this way, in addition to the problem of environmental protection caused by discarding the unused transparencies, a photocopier must be provided for photocopying the transparencies, which causes inconvenience in use. As for the method of using a scanner and a liquid crystal projector, a computer must be used for intermediate processing between the scanner and the projector, which is not only complicated to use, but also quite inconvenient to use.

Contents of the invention

The main purpose of the present invention is to provide a scanning device that can be connected to a projection device to display scanned images, which processes the image data obtained after the scanner scans the document and directly transmits it to the projector and projects it on the screen. According to this, the configuration and handling between the scanner and the projection device are simplified to make the use more convenient.

Another object of the present invention is to provide a scanning device that can be connected to a projection device to display scanned images, which can further process the images obtained by scanning documents and store them in the memory for playback or playback one by one. Select play.

Another object of the present invention is to provide a scanning device that can be connected to a projection device to display scanned images, which is equipped with a storage device for storing image data, or read electronic data from the storage device and transmit it to the projection device device to play the video.

Aiming at the above purpose, preferred and feasible embodiments are described in detail below in conjunction with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of a connection between a scanner 20 and a projection device 10 according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing the internal structure of a scanner 20 according to a preferred embodiment of the present invention.

FIG. 3 is a block diagram showing the internal structure of a scanner 20 according to a second embodiment of the present invention.

FIG. 4 is a block diagram showing the internal structure of a scanner 20 according to a third embodiment of the present invention.

Detailed ways

[first embodiment]

FIG. 1 is a schematic diagram of the connection between the scanner 20 and the projection device 10 according to the first embodiment of the present invention. In FIG. 1 , the scanner 20 and the projection device 10 are electrically connected to each other through a signal line 60 . Therefore, the scanned image data obtained from the scanner 20 can be transmitted to the projection device 10 through the signal line 60 , and then displayed on a projection screen (not shown) by the projection device 10 .

The part of the scanner 20 that interacts with the user includes a control area 44 providing key functions and a display panel 45 for displaying information. The aforementioned control area 44 and display panel 45 can also be referred to as a user interface 27 . Wherein, the control area 44 includes a scan key 46 , a selection key 47 , a selection key 48 , a read key 49 , a play key 50 , and a storage key 51 . The function of these keys will be explained later.

FIG. 2 is a block diagram showing the internal structure of the scanner 20 according to the preferred embodiment of the present invention. In FIG. 2 , the scanner 20 includes a scanning module 21 , a signal processing control unit 22 , a memory 23 , a video buffer 24 , an output unit 25 , a central processing unit 26 , a user interface 27 and a storage device 28 . Wherein, the scanning module 21 includes a plurality of light sensors 41 . The signal processing control unit 22 includes an Application Specific Integrated Circuit (ASIC) 42 for controlling the operation of the scanning module 21 , and a JPEG chip 43 for processing (for example, compressing) the image signal from the light sensor 41 .

1 and 2, when the user presses the scan key 46, a signal is sent from the user interface 27 to control the central processing unit 26 to control the application-specific integrated circuit 42 to drive the scan module 21 to scan (can be a or multiple images), and obtain the scanned first image data 31 from the light sensor 41. After the first image data 31 is processed by the ASIC 42 and the JPEG chip 43 , the second image data 32 is generated to be transmitted to the memory 23 for storage.

When the user presses the play button 50 , the user interface 27 sends a signal to control the transmission of the second image data 32 in the memory 23 to the video buffer 24 . The transfer mode of both the memory 23 and the video buffer 24 may be a direct memory access (Direct Memory Access, DMA) interface. Another feasible way is that the central processing unit 26 directly reads the second image data 32 in the memory 23 and transmits the second image data 32 to the video buffer 24 . After the second image data 32 in the video buffer 24 is transmitted to the output unit 25 for processing, the third image data 33 is generated to be sent to the projection device 10 . Wherein, the transmission interface between the output unit 25 and the projection device 10 may be a VGA (Video Graphics Array) interface, an AV (Audio Visual Signal) interface, a DVI (Digital Visual Interface) and so on.

It should be noted that if the capacity of the memory 23 is large enough, the user can scan multiple image data (can be realized by using an automatic document feeder or manual scanning of multiple documents). At this time, the user can select the image to be played by operating the selection keys 47 and 48 , and then press the play key 50 to play the selected image.

On the other hand, when the user presses the storage key 51 , the user interface 27 will control the central processing unit 26 to store the second image data 32 stored in the memory 23 into the storage device 28 . The above-mentioned storage device 28 may be a storage device such as a floppy disk, a hard disk, an optical disk, or a memory card. In this way, the user can take the played data away.

In addition to storing data, the scanner 20 of the present invention can also output the electronic data stored in the storage device 28 to the projection device 10 for playback. That is, when the user presses the read key 49 , the user interface 27 controls the central processing unit 26 to read electronic data from the storage device 28 and store the electronic data in the memory 23 as the second image data 32 . Then, the method of transmitting the second image data 32 to the projection device 10 is the same as the above method, and will not be described in detail here.

[Second embodiment]

FIG. 3 is a block diagram showing the internal structure of the scanner 20 according to the second embodiment of the present invention. In this embodiment, the scanner 20 also includes a scanning module 21 , a signal processing control unit 22 , a memory 23 , a video buffer 24 , an output unit 25 , a central processing unit 26 , and a user interface 27 .

The difference between this embodiment and the first embodiment is that the storage device 28 does not have to be basically equipped, and other structures are the same as the first embodiment. In this way, this embodiment can also realize the function of scanning and projection in the same operation manner as the first embodiment, so it will not be described in detail here.

[Third embodiment]

FIG. 4 is a block diagram showing the internal structure of a scanner 20 according to a third embodiment of the present invention. In this embodiment, the scanner 20 also includes a scanning module 21 , a signal processing control unit 22 , a memory 23 , a video buffer 24 , an output unit 25 , a central processing unit 26 , a user interface 27 , and a storage device 28 . Different from the first embodiment, the signal processing control unit 22 only includes an ASIC 42 . In this case, as long as the capacity of the memory 23 is large enough, the JPEG chip 43 is not needed to compress the data. The rest of the structure and operation are the same as those of the first embodiment, and will not be described in detail here.

According to the scanner of the present invention, the user can easily scan the document and project it on the screen through the projection device without using a computer. In this way, users can directly use written data such as printed documents, books, magazines, newspapers, etc. when making conference briefings. It is also not necessary to print written data into slides for display as in the case of traditional optical projectors. Therefore, the scanner of the present invention can provide users with considerable convenience.

Claims (13)

1. scanister that can be connected to projection arrangement with display scanned image comprises:

The one scan module obtains first image data in order to scan at least one file;

One signal processing control unit receives and handles this first image data, to obtain second image data;

One storer receives and stores this second image data;

One screen buffer receives at least a portion from second image data of this storer;

One output unit receives and handles second image data from this screen buffer, and exports the 3rd image data to this projection arrangement;

One CPU (central processing unit) is controlled the running of this signal processing control unit, this storer, this output unit; And

One user's interface is electrically connected with this CPU (central processing unit), uses the running of controlling this CPU (central processing unit) for the user.

2. the scanister that is connected to projection arrangement with display scanned image as claimed in claim 1, wherein this user's interface comprises the one scan key, this at least one file of scanning for user's control.

3. the scanister that is connected to projection arrangement with display scanned image as claimed in claim 2, wherein this user's interface also comprises a group selection key, for user's selection at least a portion from second image data of this storer.

4. the scanister that is connected to projection arrangement with display scanned image as claimed in claim 3, wherein this user's interface also comprises a play button, will export in this projection arrangement from least a portion of second image data of this storer for user control.

5. the scanister that is connected to projection arrangement with display scanned image as claimed in claim 1, also comprise a memory storage that is electrically connected with this CPU (central processing unit), and this CPU (central processing unit) is in order to second image data of processing from this storer, and second image data that will handle stores in this memory storage.

6. the scanister that is connected to projection arrangement with display scanned image as claimed in claim 5, wherein this user's interface comprises:

The one scan key, this at least one file of scanning for user's control; And

One storage key will be stored in this memory storage from second image data of this storer for user's control.

7. the scanister that is connected to projection arrangement with display scanned image as claimed in claim 6, wherein this user's interface also comprises a group selection key, will be stored in this memory storage from least a portion of second image data of this storer for user control.

8. the scanister that is connected to projection arrangement with display scanned image as claimed in claim 1, also comprise a memory storage that is electrically connected with this CPU (central processing unit), this memory device stores has electronic data, and this CPU (central processing unit) is accepted the control from user's interface, and come from electronic data in this memory storage, and data processed is sent in the storer with as this second image data in order to processing.

9. the scanister that is connected to projection arrangement with display scanned image as claimed in claim 1, wherein this signal processing control unit comprises a specific use integrated circuit, in order to controlling the action of this scan module, and receive this first image data from this scan module.

10. the scanister that is connected to projection arrangement with display scanned image as claimed in claim 9, wherein this signal processing control unit also comprises a JPEG wafer, in order to compression from first image data of this specific use integrated circuit producing second image data, and second image data is exported in this storer.

11. the scanister that is connected to projection arrangement with display scanned image as claimed in claim 1, wherein this output unit comprises digital vision transmission interface (DVI).

12. the scanister that is connected to projection arrangement with display scanned image as claimed in claim 1, wherein this output unit comprises video circular array (VGA) interface.

13. the scanister that is connected to projection arrangement with display scanned image as claimed in claim 1, wherein this output unit comprises that sound looks signal (AV) interface.

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