JPS6051361A - Image reader provided with memorandum input function - Google Patents

Abstract

PURPOSE:To improve the utility by using an oily ink or the like to write information on an image read surface easily erasably in original still-type image reader. CONSTITUTION:Information written on an image read surface 2 with an oily ink pen 15 is read by a CCD 8 and is inputted to line buffers 9A and 9B through a selector 10. An access control circuit 12 controls selectors 10 and 11 on a basis of line periodic pulses to switch the line buffer for write and the line buffer for read alternately. Write and read addresses for line buffers 9A and 9B are generated in the ascending or descending order and are controlled by an input mode control circuit 13. Information is always written in the forward direction, and information is read in the forward direction in case of the original input mode and is read in the backward direction in case of the memorandum input mode.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image reader, and more particularly to a stationary original image reader having two input modes: original and memo writing.

[Technology-rich prefecture]

Recently, document stationary image readers have come to be used as input devices in many image data processing systems C2.

By the way, such a static document image reader is designed to read only the image of the document surface, so even when inputting a simple memo by hand, for example, it is always necessary to write it on paper before reading it to the image reader. This has the disadvantage that it is cumbersome and wastes paper.

1 and 2 show a conventional example of a stationary document image reader, with FIG. 1 being an external view and FIG. 2 being a schematic diagram of the operating mechanism. In both figures, 1 is a case, 2 is a reading surface made of a transparent glass plate, 3 is an operation key, 4 is a document holding plate, 5 is a document, 6 is a carrier, 7 is a light source, and 8 is a C
OD, 9A and 9B are line buffers composed of RAM, and 10 and 11 are selectors.

When using the illustrated static document type image league, the document is placed with the image written side facing the reading surface of the image reader, and the reading operation is performed. 00D8 scans the document surface,
The image sensor is retrieved in serial data format.

This image data is stored in the line buffer 9A.

8B are alternately written to one side of each scan line and read alternately from the other in parallel at the same time. The writing line buffer and the reading line buffer are alternately switched by selectors 1θ, 11).

In the image reader having the illustrated structure, since the image of the document surface is detected by reflected light, it is scanned in a state facing the OOD, and this state is taken as an erect image. Therefore, when a memo is written directly on the continuation surface (for example, a glass plate) of the image reader, the image is scanned from the back surface and is input as an inverted image.

[Objective and Structure 1 of the Invention The object of the present invention is to provide a still document image reader,
The purpose of the present invention is to provide a means for directly inputting notes with an oil-based ink pen, etc., and for this purpose, an image reading surface is constructed of a transparent plate on which writing can be easily erased using oil-based ink, etc. , an image sensor, a line buffer that can sequentially accumulate output signals of the image sensor, and an access control that controls the order of writing or reading [7] in any forward or reverse direction according to instructions. an operating means for selectively specifying a document input mode in which the document is placed on the image reading surface and a memo input mode in which the document is written directly with oil-based ink or the like on the image reading surface; When the memo input mode is specified, the access control means is instructed to control the writing and reading orders of the line buffer in the same direction, and when the memo input mode is specified, the access control means is accessed to control the writing and reading orders of the line buffer in opposite directions. The invention is characterized in that it includes input mode control means for instructing the control means.

[Embodiments of the invention]

The details of the present invention will be explained below based on examples.

FIG. 3 is a block diagram of one embodiment of the present invention.

In the figure, 2 is an image reading surface made of a glass plate, 8 is an OOD, 9A and 9B are line buffers composed of RAM, 10 and 11 are selectors, 12 is an access control circuit, 13 is an input mode control circuit, and 14α is a Reference numeral 14b indicates a document input mode designation switch, a memo input mode designation switch, and 15 an oil-based ink dispenser.

Note that elements indicated by reference numbers 2, 8, 9A, 9I3, 10, and 11 have the same functions as the elements with the same numbers shown in FIGS. 1 and 2.

The access control circuit 12 controls the selectors 10 and 11 based on the line periodic pulse, and alternately switches the designation of the line buffers 9A and 9B as a write line buffer and a read line buffer. Further, an internal address generation circuit, which will be described later with reference to FIG. 4, sequentially generates a write address and a read address to control access to each line buffer.

Write addresses and read addresses for line buffers 9A and 9B are generated in ascending order (for example, in the forward direction) or in descending order (for example, in the reverse direction),
These are controlled by the input mode control circuit 13. For example, writing to line buffers 9A and 9B is always performed in the forward direction regardless of the input mode, while reading is performed in the forward direction in the original input mode and in the reverse direction in the memo input mode.

FIG. 4 functionally shows one configuration example of the address generation circuit provided in the access control circuit 12 described above. The figure includes two sets of address generation circuits for each of line buffers 9A and 9B (identified by A and H, respectively).

In FIG. 4C2, 16N and 16B are address registers, 17A and 17B are unit adders, 18A and 18B are unit subtracters, 19A and 19B are selectors, and 20Aft? Work 20B indicates an O-edge gate.

The address generation circuit O made up of 16A to 20A and the address generation circuit made up of 16B to 20B each have a function equivalent to a presettable reversible counter. The selection of the forward or reverse direction of each generated address string is determined by a forward or reverse instruction signal applied from the input mode control circuit 13 to the selectors 19A and 19B.

FIG. 5 shows one configuration example of the input mode control circuit 13.

In the figure, 21 is a latch circuit, 22 and 23 are NA,
N11 gate, 24 is a toggle circuit, 25 is an impermeable gate.

The latch circuit 21 includes a document input mode designation switch 14α
is set by the memo input mode designation switch 14b.
It is reset by . Therefore, in the original input mode, the Q output of the latch circuit 21 becomes OFF'F, and as a result, each output of the NAND gates 22 and 23 is unconditionally OFF.
It becomes N. The selectors 19A and 19 in Fig. 4 are modified for this purpose.
B selects the output of unit adders 17A and 17B, and
Both address generation circuits operate to generate addresses in the positive direction, that is, in ascending order.

On the other hand, in the memo manual mode, the latch circuit 21 is reset by pressing the memo manual mode designation key 14b, and its Q output is turned ON. As a result, NkND gate 22
．． The output state of 23 becomes dependent on the Q output of toggle circuit 24 and the output of inverter 25, respectively. Therefore, one of the selectors 19A and 19B in FIG. 4 selects the output of the unit adder, and the other selects the output of the unit subtracter, and these selection states are inverted by the line periodic pulses of the toggle circuit 24. It will be possible to switch between each time. In this operating state, of the two address generation circuits A and B, the one that generates addresses in the forward direction is used for writing, and the other circuit that generates addresses in the opposite direction is used for reading. be done.

In this way, in the line buffers 9A and 9B, data is always written in the forward direction and data is read out in the reverse direction, so the image written as a memo on the image reading surface is read as a reversed image, and when the original is input. can be matched with the image of

Note that when the line buffer is configured in a shift register format, the same purpose can be achieved by controlling the shift direction using a similar concept.

〔Effect of the invention〕

As described below, according to the present invention, the structure of the image league of the conventional static manuscript type can be
Since it is possible to easily write and input notes directly on the reading surface with an oil-based ink pen or the like, usability can be significantly improved.

[Brief explanation of the drawing]

Fig. 1 is an external view of a conventional document static IF-type image reader, Fig. 2 is a schematic diagram of its operating mechanism, Fig. 3 is a block diagram of an embodiment of the present invention, and Fig. 4 is an access control circuit. FIG. 5 is a diagram showing an example of an input mode control circuit. In the figure, 2 is the image reading surface and 8 is the OOD. 9A and 9B are line buffers, 10 and 11 are selectors, 12 is an access control circuit, 13 is an input mode control circuit, 14α is a document input mode designation switch, 14b
15 indicates a memo input mode designation switch, and 15 indicates an oil-based ink pen.

Claims (1)

[Claims] An image reading surface consisting of a transparent plate on which writing can be easily erased using oil-based ink, an image sensor, a line buffer capable of sequentially accumulating output signals of the image sensor, and an image sensor for the line buffer. An access control means that controls the order of writing or reading in any forward or reverse direction according to instructions, a document input mode in which the document is placed on the image reading surface, and a memo input mode in which the document is written directly on the image reading surface with oil-based ink, etc. an operating means for alternatively specifying the input mode; and an access control means for instructing the access control means to control the writing and reading order of the line buffer in the same direction when the original input mode is specified; 1. An image reader equipped with a memo input function, comprising input mode control means for instructing an access control means to control the order of writing and reading of a line buffer in opposite directions when the image reader receives a memo.