JP2603231Y2 - Digitizer inspection device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digitizer inspection apparatus, and more particularly to an electrode plate for supplying a signal, and a coordinate alignment of a sheet placed on the electrode plate and contacting a signal detection pen. The present invention relates to a digitizer inspection apparatus that easily and accurately detects the coordinates of an electrode plate and the coordinates of a sheet and corrects the detected signal.

[0002]

2. Description of the Related Art In order to output a detection signal of a conventional digitizer with high accuracy, after an electrode plate and a sheet are pasted together, a hole through which an operator can insert a pen tip of a detection pen is formed in an insulating material. The pen tip of the detection pen is inserted into this hole, and the digitizer is inspected based on the data detected each time. . Japanese Patent Publication No. Hei 3-30903 filed by the applicant of the present invention discloses that a right-angled triangular guide plate on which a plurality of detection points are arranged is placed after bonding an electrode plate and a sheet. What can be easily confirmed is disclosed. Further, the inspection of the tablet pattern (electrode pattern) cut of the digitizer is performed by an operator tracing an input area on the digitizer surface with a pen dedicated to the digitizer.

[0003]

The former using the above-mentioned conventional technique not only takes time and costs to improve the accuracy of assembly, but also depends on the skill of the operator who performs the inspection. There has been a problem that the detection level varies, and the detection takes time. Japanese Patent Publication No. 3-30903 is very effective in positioning the origin of the tablet, but a bit switch has to be used for correction, and there is still a point that it is difficult to use.

The present invention has been made in view of the conventional problems, and has an electrode plate having a plurality of electrode lines arranged along a coordinate axis, and a sign placed on the electrode plate and having a sign on the surface along the coordinate axis. And a sheet placed on the sheet, and detected at four places.
Output point, and a signal for signal detection is provided at the detection point.
Made of insulating material with holes for inserting the detection pen
A board, a switch connected to each of a plurality of detection points on the board, a digitizer control circuit for receiving a switch signal of the switch, and a digitizer test, which performs arithmetic processing on the signal of the digitizer control circuit. apparatus.

In the digitizer inspection apparatus of the present invention, a substrate made of glass epoxy having detection points disposed thereon is placed on the digitizer, and the points to be detected are switched by a command from an external device (personal computer) to perform a desired operation. Obtain inspection data.

【Example】

An embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an electrical block diagram when a digitizer control circuit is provided inside the digitizer. Tablet 1
Has a plurality of electrode wires 2 and 3 arranged in the X and Y axis directions. On the tablet 1, a protective sheet made of a dielectric material for protecting the tablet 1 is attached. A scanning signal from the digitizer control circuit 4 is connected to each of the electrode lines 2 and 3 of the tablet 1 via a decoder (not shown). A jig plate 5 with a detection terminal made of glass epoxy is placed on the digitizer 1. The jig plate 5 with detection terminals has four detection points (1, 1),
At (1, N), (N, 1), and (N, N), holes for inserting a pen tip of a signal detection pen (not shown) are formed. Each of these detection points is connected to a terminal provided at the terminal 6. Each terminal of the terminal 6 is connected to each terminal of the pen signal switching circuit 7. Further, the digitizer control circuit 4 is connected to a personal computer as an external device.

FIG. 2 is a longitudinal sectional view of a main part near a detection point of the jig plate 5 with detection terminals. The first insulator 9 made of glass epoxy is considered so that the selection of the inspection accuracy can be adjusted by the thickness depending on the type of the digitizer to be inspected. A detection terminal 10 at a detection point electrically coupled to each electrode of the digitizer 1 is inserted and fixed in an insulator 11 made of a second glass epoxy, and the insulator 11 is sandwiched between the first and second insulators 9. Extending in the layer 12 to the terminal of each detection point 6. In addition, the first and second
A dielectric material is provided between the insulators.

The embodiment of FIG. 1 will be described with reference to the flowchart of FIG. A jig plate 5 with detection terminals on which predetermined (four in the figure) detection points 10 (see FIG. 2) are placed is placed on the digitizer 1. In response to a start signal from the personal computer 8, the digitizer control circuit 4 sequentially applies a scanning signal to each electrode line of the tablet 1 for each axial direction. Next, a pen signal switching command is applied from the personal computer 8 to the digitizer control circuit 4 (step 1), and the digitizer control circuit 4 applies a pen signal switching signal to the pen signal switching circuit 7. The data of the desired detection point of the personal computer 8 is applied to the digitizer control circuit 4 (step 2), and the digitizer control circuit 4 selectively connects the terminal corresponding to the specified detection point by the pen signal switching circuit 7.

The digitizer control circuit 4 capacitively couples with the electrode line corresponding to the connected detection point, detects the scanning signal applied to the electrode line (step 3), and the digitizer control circuit 4 causes the digitizer control circuit 4 to perform position coordinates of the tablet 1. The signal is determined, and the result is applied to the personal computer 8 (step 4). The personal computer 8 compares the position coordinate signal from the digitizer control circuit 4 with the scanning signals applied to the electrode lines 2 and 3 of the tablet 1 to determine whether or not the tablet 1 is good. In this determination, the actual position information of the tablet 1 and the detected position information are compared and calibrated. A signal corresponding to the calibrated coordinate position is recorded in the EEPROM. The coordinate position signal recorded in the EEPROM is used as a formal signal at the time of signal detection. If recovery cannot be performed even after calibration in the determination, the operator is informed of such a situation by warning or alarm.

Next, a case of disconnection inspection of the electrode wires 2 and 3 of the tablet 1 will be described with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals. FIG. 4 is an electrical block diagram in the case where the digitizer control circuit 4 is provided inside the digitizer. Tablet 1 has X,
A plurality of electrode wires 2 and 3 are provided in the Y-axis direction. On the tablet 1, a protective sheet made of a dielectric material for protecting the tablet 1 is attached. A scanning signal from the digitizer control circuit 4 is connected to each of the electrode lines 2 and 3 of the tablet 1 via a decoder (not shown). A jig plate 14 with a detection terminal made of glass epoxy is slidably mounted on the tablet 1 on the digitizer 1. The jig plate 14 with detection terminals has four detection points (1, 1), (1, N), (N, 1),
(N, N) has a hole into which the tip of a signal detection pen (not shown) is inserted. Each of these detection points is connected to terminal 6
Are respectively connected to the terminals provided in the. From each terminal of the terminal 6, a pen signal switching circuit 1 controlled by the CPU is provided.
3 terminals. Further, it is assumed that the digitizer control circuit 4 is built in the digitizer device.

On the tablet 1, a predetermined (4 in the figure)
F) The jig plate 14 with the detection terminals on which the detection points 10 (see FIG. 2) are arranged is placed. In response to a start signal from the personal computer 8, the digitizer control circuit 4 sequentially applies a scanning signal to each electrode line of the tablet 1 for each axial direction. Next, a pen signal switching command is applied from the personal computer 8 to the digitizer control circuit 4, and the digitizer control circuit 4 applies a pen signal switching signal to the pen signal switching circuit 13. The data of the desired detection point of the personal computer 8 is applied to the digitizer control circuit 4, and the digitizer control circuit 4 selectively connects the terminal corresponding to the specified detection point by the pen signal switching circuit 13. In this inspection, the jig plate 14 with detection terminals is moved vertically or horizontally, and the detection is repeated at the position where the jig plate 14 has been moved and stopped. In this way, the coordinate data of the detection point specified by the pen signal switching command from the personal computer 8 is continuously collected.

The digitizer control circuit 4 capacitively couples with the electrode line corresponding to the connected detection point, detects the scanning signal applied to this electrode line (step 3), and the digitizer control circuit 4 causes the digitizer control circuit 4 to position the tablet 1 at the position coordinates. The signal is determined, and the result is applied to the personal computer 8 (step 4). The personal computer 8 compares the position coordinate signal from the digitizer control circuit 4 with the scanning signals applied to the electrode lines 2 and 3 of the tablet 1 to determine whether or not the tablet 1 is good. In this determination, the actual position information of the tablet 1 and the detected position information are compared and calibrated. A signal corresponding to the calibrated coordinate position is recorded in the EEPROM. The coordinate position signal recorded in the EEPROM is used as a formal signal at the time of signal detection. If recovery cannot be performed even after calibration in the determination, the operator is informed of such a situation by warning or alarm.

[0013]

[Effects of the Invention] The present invention has the above configuration, so that the detection position can be freely specified by a command from a personal computer with respect to the coordinate position of the digitizer electrode line.
The inspection time can be greatly reduced, and the correction of the coordinate position signal can be easily performed. In addition, disconnection of the digitizer electrode wire can be detected reliably and quickly.

[Brief description of the drawings]

FIG. 1 is an electrical block diagram

FIG. 2 is a vertical sectional view of a detection terminal.

FIG. 3 is a flowchart.

FIG. 4 is an electrical block diagram of disconnection detection.

[Explanation of symbols]

 1 Tablet 2 X electrode wire 3 Y electrode wire 4 Digitizer control circuit 5 Jig board with detection terminal 6 Terminal 7 Pen signal switching circuit 8 Personal computer 9 Insulator 10 Detection terminal 11 Insulator 12 Dielectric material 13 Pen signal switching circuit 14 Detection terminal Jig plate

Claims (1)

(57) [Scope of request for utility model registration] 1. An electrode plate having a plurality of electrode lines arranged along a coordinate axis, a sheet placed on the electrode plate and having a mark on the surface along the coordinate axis, and placed on the sheet;
Four detection points are provided, and signal detection is performed at the detection points.
Insulation with a hole for inserting a signal detection pen for output
A substrate made of a material, a switching device connected to each of a plurality of detection points of the substrate, a digitizer control circuit for receiving a switching signal of the switching device, and arithmetically processing signals of the digitizer control circuit. Digitizer inspection equipment.