JPS62171272A - Optical image reader - Google Patents

Abstract

PURPOSE:To add a function as an electronic blackboard to a conventional blackboard by assembling incorporatedly a photoelectric converter, a light source and a signal processing circuit or the like in one containing box so as to move the box along a read object face. CONSTITUTION:A wheel 3 to move the containing box 1 along the face of the blackboard 2 is fitted to the bottom of the box 1. Further, a rod lens module 5 is arranged at the inside of a glass 4 of a bottom and the reflected light from the blackboard 2 is led to the photodetection face of the photoelectric transducer 8 fitted to the bottom of the control circuit unit 6 provided to the upper face of the box 1 and the signal processing unit 7. Further, a light source 9 is provided adjacent to the lens module 5. On the other hand, a detector 10 detecting the moving extent of the box 1 is fitted to the shaft of the wheel 2. The moving extent of the box 1 is inputted to a control circuit unit 6. Then the image described on the blackboard 2 is recorded as a hard copy on a printer by using the control circuit unit 6 and the signal processing unit 7.

Description

[Detailed Description of the Invention] [Industrial Application Field 1] The present invention relates to an optical image reading device that optically reads an image written on a flat body such as a blackboard or whiteboard and records it on an external printer or the like. be.

[Prior Art] Conventionally, electronic blackboards (or electronic whiteboards) are known in which an image written on a blackboard or whiteboard is optically read and recorded by an attached printer.

[Problems to be Solved by the Invention] However, in conventional electronic blackboards, the photoelectric conversion device and printer that read the image written on the blackboard are integrated with the blackboard, so they are not commonly used in school classrooms, etc. There was a problem in that it was completely impossible to add functionality as an electronic blackboard to a blackboard because of its structure.

The present invention was made to solve these problems, and its purpose is to provide an optical image reading device that can easily add the functionality of an electronic blackboard to a commonly used blackboard. It's about doing.

[Means for Solving the Problems] The optical image reading device of the present invention includes a light source that illuminates a surface to be read, receives reflected light from an image written on the surface to be read, photoelectrically converts it, and outputs it. a storage box that integrally stores the light source and the photoelectric conversion device; a translation device that moves the storage box along a surface to be read; and a movement detection device that detects the amount of movement of the storage box. death,
It is composed of a movement detection device that outputs the output signal of the photoelectric conversion device to the outside together with the output signal of the photoelectric conversion device.

[Function] The photoelectric conversion device and the light source are stored in the same storage box and cannot be moved.
The J device moves along the surface to be read 6, and during this movement process, the reflected light of the image written on the surface to be read is read and photoelectrically converted.

Therefore, it is possible to read not only the image of a general blackboard, but also the image of a manuscript placed on a desk, for example, so it is possible to easily add functions to an electronic blackboard, and it is also possible to read images of a portable image reading board. It will also be available as a device.

[Embodiment 1] FIG. 1 is an external cross-sectional view showing an embodiment of the present invention. On the bottom of the storage box 1, there are wheels 3 for moving the storage box 1 along the image reading surface of the blackboard 2. is installed. Further, a transparent glass 4 is provided approximately at the center of the bottom surface to prevent dust from entering, and a rod-shaped lens module 5 is placed inside this glass 4, and the upper surface of the storage box 1 is provided with a transparent glass 4. The control circuit unit 6 provided at the bottom of the blackboard 2 and the light receiving surface of the photoelectric conversion element 8 attached to the bottom of the signal processing unit 7 are coupled so as to guide reflected light from the blackboard 2 to the light receiving surface of the photoelectric conversion element 8 attached to the bottom of the signal processing unit 7.

Furthermore, a light source 9 is provided adjacent to the lens module 5 to provide a certain amount of illumination to the surface of the blackboard 2 to be read.

On the other hand, on the axis of the wheel 2 is a detector 10 that detects 8vJ when the storage box 1 is moved along the surface to be read on the blackboard 2.
is installed.

FIG. 2 shows a lens module 5 and a photoelectric conversion element 8. This figure shows the detailed configuration of the light source 9 and the lens module 5.
Photoelectric conversion element 8. Each of the light sources 9 has an elongated structure that is slightly longer than the width W of the surface of the blackboard 2 to be read. and,
The photoelectric conversion element 8 is of a long amorphous silicon type and has a resolution of 1 to 4 pixels per 1ti11.

The optical image reading device 20 configured in this manner is constructed by engaging the wheels 3 of the storage box 1 with the rails 11 provided parallel to the upper and lower ends of the reading surface of the blackboard 2, as shown in FIG. , are manually moved along the surface of the blackboard 2 to be read. Then, during this movement process, the reflected light from the surface to be read illuminated by the light source 9 hits the glass 4.
The light then enters the light receiving surface of the photoelectric conversion element 8 via the lens module 5, and is photoelectrically converted.

On the other hand, when the wheel 3 starts rotating due to the movement of the storage box 1, a plurality of pulse signals are sent to the detector 10 for each rotation of the wheel 3.
, and is input to the control circuit unit 6. Then, the control circuit unit 6 calculates the amount of movement of the storage box 1 based on the pulse signal received from the detector 10, and calculates the amount of movement of the storage box 1 based on the pulse signal received from the detector 10.
One synchronization signal is generated for each Jfa and sent to the signal processing unit 7.

When the signal processing unit 7 receives a synchronization signal from the control circuit unit 6, it sends out a photoelectric conversion signal for one scanning line in response to one of the synchronization signals, and connects the cable to the device 20 as shown in FIG. 12 to the connected printer 13. As a result, the image written on the blackboard 2 is recorded as a hard copy by the printer 13.

Note that when a white board is used instead of the blackboard 2, the white level and black level of the photoelectric conversion signal are inverted in the signal processing unit 7 and transferred to the printer 13.

Incidentally, in the above embodiment, as the light source 9, a fluorescent lamp, a linear halogen lamp, a tungsten lamp, etc. can be used. Further, the storage box 1 can be moved automatically by incorporating a motor. Furthermore, an external device such as a printer may be connected using infrared signals or radio waves.

[Effects of the Invention] As explained above, the present invention integrates a photoelectric conversion device, a light source, a signal processing circuit, etc. into one storage box, so that it can be freely set on a surface to be read such as a blackboard. Because of this structure, it is possible to easily add a separate note as an electronic blackboard to a commonly used blackboard. Furthermore, since it is possible to read not only an image of an electronic blackboard but also an image of a document placed on a desk, for example, it can be used as a portable image reading device.

[Brief explanation of drawings]

Figure 1 is an external sectional view showing an embodiment of the present invention, Figure 2 is a diagram showing details of the optical structure including a photoelectric conversion element, and Figure 3 is a diagram showing an example of use as an electronic whiteboard. be. 1...Storage box, 2...Blackboard, 3...Wheels, 4...
- Glass, 5... Lens module, 6... Control circuit unit, 7... Signal processing unit, 8... Photoelectric conversion element, 9... Light source, 10... Detector, 11...
・Rail, 12...cable, 13...printer. , - Part 2) Applicant's agent Takahisa Kimura ・'1]
1 ・Nigo Niichi No. 1, Ramie, No. 2, No. 3

Claims (3)

[Claims] (1) A light source that illuminates the surface to be read, a photoelectric conversion device that receives reflected light from an image written on the surface to be read, performs photoelectric conversion, and outputs the light, and the light source and the photoelectric conversion device are integrated. a storage box that moves the storage box along a surface to be read; a movement detection device that detects the amount of movement of the storage box by the movement device and outputs it to the outside together with an output signal of the photoelectric conversion device; An optical image reading device comprising: (2) The photoelectric conversion device is configured by a photoelectric conversion element and a lens module that guides reflected light of an image of a surface to be read to the element.
) The optical image reading device according to item 2. (3) The optical image reading device according to claim (1), wherein the photoelectric conversion device is constituted by an elongated amorphous silicon photoelectric conversion element.