JPS6277625A - Tablet input device - Google Patents

Abstract

PURPOSE:To detect the page of a definition sheet securely by providing plural state discrimination means for definition sheets of a book type tablet. CONSTITUTION:The tablet 2 is provided with three discrimination means 10-12 composed of photodetecting elements for discriminating the mount states of the definition sheets. A CPU 108 makes a majority decision on output data of 4-bit constitution supplied from the three discrimination means 10-21 through connectors 111 and IO 107 to determine the current page number. Further, the definition sheets are provided with a through hole for discrimination at a place corresponding to each decision means. Consequently, even if a definition sheet floats and some of the state discrimination means 10-12 output wrong data, a number specifying means makes a majority decision on them to output a correct page number.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tablet input device, and more particularly to an improvement in a page detection method for a lock-type tablet.

(Prior art) Regarding page detection methods for book-type tablets, there are two methods: For example, a method in which a metal sticker is attached to each definition sheet in a different position and its presence or absence is detected by a proximity sensor, and each definition sheet is held. There are various methods, such as embedding a permanent magnet in the hinge and detecting its presence with a reed switch, or drilling a through hole in a different position for each definition sheet and detecting its presence with a light-receiving element.

(Problem to be solved by the invention) However, the methods proposed in the past, including the methods exemplified above, are inexpensive but do not operate reliably, or conversely, they operate relatively reliably but have high costs. There is a problem. For example, in the case of the method using the above-mentioned light receiving element, although the cost is low, if the definition sheet rises, the light receiving element may malfunction due to light entering from there. For example, above □
In the case of a combination method of a hinge magnet and a reed switch, the operation is relatively reliable, but the cost is high.

(Means for Solving the Problems) The present invention has been made to solve these problems, and includes a tablet and an identification means placed on the tablet that corresponds to the page number. A definition sheet, at least three sets of state determining means for determining the state of the identifying means, and a number specifying means for taking a majority vote of the output data of the determining means and specifying the page number at that time.

(Function) As a result, even if the definition sheet rises and a part of the state determining means outputs incorrect data, the second number specifying means can output the correct page number by a majority vote of these data.

(Example) The details of the present invention will be explained below based on illustrated examples. 1st
In the figure, reference numeral 1 denotes a tablet input device which is an embodiment of the present invention, and a tablet 2 is attached to the top surface of the tablet input device. This tablet 2 has a predetermined size 1, for example 6 mm.
A unit key segment of x 6 mm square is provided, and definition sheets are attached to the left and right sides of the board, respectively).
3 a.

3f is provided with a unit section 4 indicating this unit key segment, and kanji, kana, numbers, and various other definition items are assigned to each section (not shown). Reference numerals 3b to 3e are movable definition sheets, which are connected to the wire ring 5 arranged in a vertical line in the center of the tablet 2 so that the pages can be turned freely, and these are also provided with unit sections 4 to which various definition items are assigned (
Not shown. 6 is an input pen and each definition sheet 3a to 3f
The corresponding code is output by matching the desired definition item above.

7a to 7d, 8a to 8d, and 9a to 9d are holding holes, which are drilled through the tablet 2 and the fixed definition seam) 3f, respectively. They are arranged in a horizontal line on the side. 10a-10d
, 11a to 11d, and 12a to 12d are light receiving elements each made of a phototransistor, CdS, etc., and the light receiving element 1
0a-10d, 11a-1 id and 12a-12d
are the first. They serve as second and third discrimination means. Each of the movable sheets 3c to 3e is provided with a through hole which serves as an identification means for indicating the binding position. That is, the definition sheet) 3e includes the through holes 13b to i3d, 14b to 14d, which communicate with the holding holes 7b to 7d, 8b to 8d, and 9b to 9d, respectively, when the tablet) 2 (7p is placed upside down on the right board surface). , 15b~
15d, and the seat 3d also has respective holding holes 10c, 1.
0d, 11c, 11d.

12c and 12d, and the through holes 16C116d and 17c that communicate with each through hole of the sheet 3e connected thereto.
, 17d, 18c and 18d.

Similarly, each holding hole 10d is provided in C) 3e.

Through holes 19d, 20d and 21d are formed to communicate with the through holes in sheets 11d and 12d and the sheets 3e and 6d connected thereto, respectively.

Figure 2 shows the block configuration. In the figure, 2 is the aforementioned tablet, and 6 is the same input pen.

6A is the detection tip, and 6B is the pen switch.

10 to 12 are also number 1. These are second and third discrimination means. 101 is an X-direction electrode line, and 102 is an X-direction electrode line, which are arranged at predetermined intervals in the X direction and the X direction, respectively.

A decoder driver 103 operates according to the supplied address signal AD.

A scanning pulse SP is applied to each electrode wire 101 and 102 via a connector 104. 105 is an amplifier and detection tip 6
The induced pulse PP generated at A is amplified. 106 is an analog-to-digital converter that converts the pulse height of the induced pulse PP into a digital value DD. 107 is an input/output boat (hereinafter "■
0"), and the processing unit 108 (hereinafter referred to as "CPU
It is used for exchanging data with each block (referred to as J). The CPU 108 is a so-called microcomputer integrated into an IC, and has a read-only memory 109 (hereinafter referred to as 1'-R).
According to the program stored in the random access memory 110 (hereinafter referred to as "RAMJ")
While using
Execute other window processing.

Next, the operation of this embodiment will be explained. First, when the operator brings the tip 6A of the input ben 6 into contact with a desired definition item (character, etc.) on the desired definition sheet 3a to 3f, the pen switch and chiro B close and the pen switch signal ps is transmitted to C via l0107.
PU1o8 is supplied. CPoloB is this signal P
In response to S, the X-direction and Y-direction electrode lines 1D1 and 102
A predetermined address signal AD is applied to apply a scanning pulse SP to
will be supplied sequentially. Then, the CPU 108 temporarily stores the digital value of the induced pulse PP generated at this time in the RAM 110. Next, the maximum values in the X and Y directions are selected from among these digital values DD, and the coordinate data KD of the key segment designated at that time is specified.

Next, the CPU 108 connects the connector 111. A majority vote is taken for the six output data sD1-5D12 of 4-bit configuration from each discriminating means 10-12 supplied via 10107, and the page number PN at that time is specified. In this case, it is a majority vote of three data, so if two of them match and tail, then add 5D1o to 5D11, 5D1o to 5
D12°S Di 1 and 5DI2 are sequentially compared, and as soon as they match, that data is taken as the result of the majority vote. This is the page number PN specified at that time.

Note that the corresponding bit outputs 2 of each data 5D1D-8D12, for example, the light receiving elements 10a, Ila, 12a, 10b
and 11b and 12b, =-, 4) A majority vote may be taken for each intelligence, and the page number PN at that time may be determined based on the state of each pit derived as a result.

Then, the CPU 108 selects the page number P specified at this time.
ROMID N and the key segment coordinate data KD mentioned above.
Check against the table in 9.

Code CD indicating definitions of characters, etc. instructed at that time
is read out and sent to a host computer (not shown) or the like.

Note that in this embodiment, the through holes 13 b and 13 c #1
3d, . . . and light receiving element 10a, iob
, 10c..., constituted the identification means and state determination means, but the identification means and state determination means could be formed by a combination of the above-mentioned magnet, reed switch, metal seal and proximity sensor, etc. It can also be configured.

Further, in this embodiment, three sets of identification means and state determination means are provided, but more than three sets may be provided.

(Effects) As described above, according to the present invention, it is possible to obtain a tablet input device that can perform page detection reliably and requires less cost.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, with FIG. 1 being a perspective view of the device and FIG. 2 being a block configuration diagram. 2・・・・・・Tablet, 3・・・・・・・・・
・Definition sheet. 10-12・・・・・・Situation level 1z 11th grade,
13-21...Identification means, 108-
110... Mountain... Number identification means.

Claims (1)

[Claims] a tablet, a definition sheet placed on the tablet and provided with identification means corresponding to the page numbers, and at least three sets of state determination means for determining the state of the identification means;
A tablet input device characterized by comprising number specifying means for taking a majority vote on the output data of the discriminating means and specifying the page number at that time.