JPS60202304A - Liquid crystal display type protractor - Google Patents

Abstract

PURPOSE:To display the numerical value of an angle between arbitrary angle scales, which are detected by sensors, by forming the angle scales, which are displayed on a liquid crystal display, at the liquid crystal display part in a flat shape at an equal angle interval, and providing sensors in correspondence with the scale angles. CONSTITUTION:A CPU21 always monitors the flag bits of a keyboard I/F20 and sensor I/F22. When the ten keys of operating keys 6 are depressed, the flag bits of the keyboard I/F20 rise, and the angle data, which is inputted from the operating keys 6, is sent to the CPU21. The CPU21 sends the angle data to a liquid crystal driving I/F23 and an angle display I/F24. The liquid crystal driving I/F23 selects a transparent display electrode 14 corresponding to the angle data, and the angle scales, which are inputted from the operating keys 6 are displayed by the liquid crystals. The angle display I/F24 drives an angle display part 9, and the numerical value of the angle is displayed in synchronization with the input from the operating keys 6. Thus the arbitrarily specified angle scales can be displayed by the liquid crystals. The angle, which is formed by two sensors, can be detected and displayed by the numerical value.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a liquid crystal display type protractor in which an angle scale is displayed on a liquid crystal.

[Problems with conventional technology]

Conventionally known protractors are generally made of a flat plate made of transparent resin and have angle scales formed at equal angular intervals by printing or the like.

For example, if you try to measure the angle formed by two intersecting straight lines drawn on a piece of paper using such a protractor, you will find that it is easy to measure using the 0° scale, so it is 0. It is necessary to move the protractor so that the reference line of the ° scale is located on one of the two straight lines. For this reason,
There is some inconvenience when using it.

Also, using this conventional protractor, for example, on paper,
If you try to draw two straight lines that intersect at an arbitrary angle,
There is a problem in that the desired angle scale cannot be immediately found on the protractor, except for the 10° scale and the 5° scale.

Thus, conventional protractors cannot be used efficiently.

[Purpose of the invention]

SUMMARY OF THE INVENTION The present invention has been proposed in view of these conventional problems, and it is an object of the present invention to provide a liquid crystal display type protractor that can be used efficiently and has an angle scale displayed on a liquid crystal display. With the goal.

[Summary of the invention]

In order to achieve this object, the liquid crystal display type protractor of the present invention has liquid crystal display angle scales formed at equal angular intervals on a flat liquid crystal display section, and a sensor corresponding to each of the angle scales. The present invention is characterized in that it numerically displays the angle between arbitrary angle scales detected by the provided sensor, and also displays on a liquid crystal display the angle scale corresponding to the specified arbitrary angle.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is an external perspective view of a liquid crystal display type protractor constructed according to the present invention, and shows a semicircular protractor.

In FIG. 1, a flat liquid crystal display section 1 that displays an angle scale is formed in a semicircular shape, and a reference point display 2 that serves as a reference point for a protractor is printed or otherwise printed at the center point of the arc. has been done.

In addition, sensors 3 corresponding to the respective angle scales are exposed on the surface of the arcuate periphery of the liquid crystal display section 1.
They are spaced at ° intervals. This sensor 3 is formed by printing or the like using a polymeric piezoelectric material such as polyvinylidene fluoride, and can detect contact pressure from the outside. Note that as the sensor 3, an electrostatic contact type sensor or the like may be used in addition to the piezoelectric type sensor.

Further, an operation section 4 that is continuous with the liquid crystal display section 1 is provided. A solar battery panel 5 is disposed on the operating section 4, and supplies power to drive a control circuit, etc., which will be described later. Note that instead of providing the solar battery panel 5, a panel-shaped lithium battery or the like may be used as a power source for the control circuit and the like.

Further, the operation section 4 is provided with an operation key 6 consisting of a so-called numeric keypad at a position to the right of the solar cell panel 5. By pressing the numeric keypad of the operation key 6 to specify an angle, the angle scale of the specified angle is displayed on the liquid crystal display. Here, among the operation keys 6, a key 7 labeled A (hereinafter referred to as A key 7) is a display key, and is pressed following the numeric keypad to input an angle. Furthermore, by pressing the A key 7 alone, all angle scales can be displayed on the liquid crystal display. In addition, the key 8 labeled C (hereinafter referred to as C key 8) serves as a clear key, and by pressing the C key 8, the display of the displayed angle scale can be canceled. If you cancel the display, you can clear the numeric keypad input.

Further, on the right side of the operation key 6, there is provided an angle display section 9 that numerically displays the angle input from the numeric keypad and the angle detected by the sensor 3. The angle display section 9 is composed of three blocks of seven segments of liquid crystal, and can display the angle numerically using the liquid crystal.

Next, the configuration of the liquid crystal display section 1, which is transparent in a non-displaying state, will be explained with reference to the schematic perspective view of FIG. 2.

In FIG. 2, a lower substrate 10 disposed on the back side of the liquid crystal display type protractor is formed from a transparent thin plate made of high-strength synthetic resin or the like.

By forming the substrate 10 from synthetic resin in this manner, cracking of the substrate 10 can be prevented. Further, a thin transparent back electrode 11 is formed on the upper surface of the lower substrate 10 . Further, an upper substrate 12 made of a transparent thin plate made of the same material as the lower substrate 10 is provided at a constant distance from the lower substrate 10. This interval is regulated by a plurality of spacers (not shown). Further, between the lower substrate 10 and the upper substrate 12, a liquid crystal 13 is provided.
is included.

On the lower surface of the upper substrate 12, a transparent display electrode 14 is provided which is formed in the shape of an angle scale and drives the liquid crystal 13 to display the angle scale.

The display electrodes 14 are formed at intervals of, for example, 1°. In addition, the display electrode 14 is connected to a wiring pattern 15 of a transparent conductive pattern shown by a broken line in FIG.
This wiring pattern 15 is connected to a liquid crystal drive interface of a control circuit to be described later.

Further, on the upper surface of the upper substrate 12, the sensors 3 are provided on the arcuate periphery of the substrate 12 at 1° intervals corresponding to the respective display electrodes 14. The sensor 3 is formed by sandwiching polyvinylidene fluoride between aluminum electrode films, and the electrode film on the surface is protected by an elastic rubber film or synthetic resin film. Further, the sensor 3 is connected to a transparent lead-out wiring pattern 16, and this lead-out wiring pattern 16 is connected to a sensor interface to be described later. Further, the upper surface of the upper substrate 12 except for the sensor 3 portion is geo-barcoded with the same material as the substrate 12.

Here, the transparent back electrode 11 on the surface of the lower substrate 10 is not formed in a portion facing the sensor 3, the wiring pattern 15, and the lead wiring pattern 16.

By the way, a transparent angle display electrode 17 is provided on the transparent display electrode 14 which serves as an angle scale in lO° increments.
When all angle scales are displayed by pressing the key 7 alone, the liquid crystal display type protractor can be used in the same manner as a conventional general protractor. If the all-display function is not added, there is no need to provide the angle display electrode 17.
Furthermore, all the transparent display electrodes 14 can be formed to have a uniform length.

Note that the transparent display electrodes 14 may be formed at intervals of 0.5°, and the sensors 3 may also be formed at intervals of 0.5°.

Next, the structure and operation of the control circuit of the liquid crystal display type protractor will be explained based on the block diagram of FIG. 3.

In FIG. 3, each key of the operation keys 6 is a keyboard interface 20 (hereinafter referred to as a keyboard I/F 20).
)” connected to the keyboard)” I/F
20 is connected to a microprocessor 21 (hereinafter referred to as CPU 21) via a pass line. Further, each of the sensors 3 is connected to a sensor interface 22 (hereinafter referred to as sensor I/F 22), and this sensor I
/F22 is connected to the CPU 21 via a pass line. Further, the transparent back electrode 11 and each transparent display electrode 14 are connected to a liquid crystal drive interface 23 (hereinafter referred to as liquid crystal drive I/F 23), and this liquid crystal drive I/F
23 is connected to the CPU 21 via a pass line.

The angle display section 9 also includes an angle display interface 24.
(hereinafter referred to as angle display I/F 24), and this angle display I/F 24 is connected to CPU 21 via a pass line.

In addition, the ROM 25 in which the program is stored is connected to the CPU.
21 is connected to the pass line.

Next, the operation of the control circuit will be described. The CPU 21 constantly monitors the flag bits of the keyboard I/F 20 and sensor I/F 22. For example, when the numeric keypad of the operation key 6 is pressed, a flag bit of the keyboard I/F 20 is set, and the angle data input from the operation key 6 is sent to the CPU 21 via the keyboard I/F 20. C
The PU 21 sends the angle data to the liquid crystal driver, /F' 23 and angle display I/F 24. LCD drive I/F23
Then, the transparent display electrode 14 corresponding to the angle data is selected, and the angle scale of the angle input from the operation key 6 is displayed on the liquid crystal. In addition, the angle display I/F 24 is connected to the angle display section 9.
The angle is displayed numerically in synchronization with the input of the operation key 6.

Also, when the sensor 3 is pressed, the sensor I'/F22
flag bit is set, and the data detected by any two sensors 3 is sent to the CP via the sensor I/F 22.
Sent to U21. The CPU 21 calculates the angle between two arbitrary sensors 3, creates angle data, and sends the data to the angle display I/F 24. As a result, the angle display section 9 numerically displays the angle sandwiched between the two sensors 3. At this time, the transparent display electrode 14 corresponding to the pressed sensor 3 may be selected to display the angle scale.

FIG. 4 shows the liquid crystal display type protractor constructed as described above, with an angle scale of, for example, 23 degrees displayed by operating the operation key 6. As shown in FIG.

FIG. 5 also shows a sensor 3 that shows the angle formed by two straight lines on the page by arrows M and N using the liquid crystal display type protractor.
By pressing , the measured state is indicated and the angle formed by, for example, 20° and 92 straight lines displayed on the angle display section 9 can be easily determined.

In this way, according to the liquid crystal display type protractor, unlike conventional protractors, there is no need to indicate the angle scale on the protractor, and the desired angle scale can be immediately displayed on the liquid crystal display, improving usability. has been done.

Further, even when trying to measure an angle, it is not necessary to measure with reference to a 0° reference line, for example, and the angle can be measured by pressing any sensor 3, which improves usability. Note that, instead of providing the operation section 4 continuously with the liquid crystal display section 1, a single operation section may be connected to the liquid crystal display section 1 by a cable. Further, instead of a semicircular protractor, a liquid crystal display type protractor may be used, in which the liquid crystal display portion is formed in a rectangular shape, for example, and has an angular scale 9 up to 90'.

〔Effect of the invention〕

As explained above, according to the liquid crystal display type protractor of the present invention, an arbitrarily designated angle scale can be displayed on the liquid crystal display, and the angle between the two sensors can be detected and displayed numerically, which improves the ease of use. is planned.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of a liquid crystal display type protractor according to an embodiment of the present invention, FIG. 2 is a perspective view schematically showing the configuration of the liquid crystal display section of the protractor, and FIG. 3 is a diagram of the control circuit of the protractor. FIG. 4 is a perspective view showing a state in which the protractor displays an angle scale, and FIG. 5 is a perspective view showing a state in which the protractor is measuring an angle. 1...Liquid crystal display section 3...Sensor 6...Operation keys 9...Angle display section 10...Lower substrate 11...Transparent back electrode 12...Upper substrate 13...Liquid crystal 14 ...Transparent display electrode 15...Wiring pattern 16...Leader wiring pattern Patent applicant: Naoki Saito Shin Horikoshi - Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] Angular scales to be displayed on the liquid crystal display are formed on a flat liquid crystal display section at equal angular intervals, and sensors are provided corresponding to each of the angle scales, and the angle between arbitrary angle scales 9 detected by the sensor is A liquid crystal display type protractor characterized by displaying a numerical value as well as an angle scale corresponding to any specified angle on a liquid crystal display.