JPH0530942U - Information input device - Google Patents

Abstract

(57) [Summary] [Purpose] The detection operation time setting time was varied according to the position coordinate confirmation time to reduce power consumption. A coordinate input panel including a plurality of electrode lines arranged in a coordinate axis direction, a decoder driver unit for applying a pulse signal to the electrode lines, and a signal capacitively coupled with the pulse signals applied to the electrode lines. In a data input device comprising a coordinate designating unit for performing detection and a signal processing unit for calculating a signal detected by the coordinate designating unit as position coordinates, when the coordinate position is determined faster than a set predetermined time, the predetermined position is determined. It is an information input device that turns off the power of the decoder driver until the time. [Effect] Needless to say, when the operator separates the input pen from the coordinate input panel, the power consumption can be suppressed because no unnecessary processing operation is performed during the input operation.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an information input device for figures, characters, and the like, and more particularly to an information input device in which the set time of the detection operation time is varied according to the fixed time of the position coordinates to reduce power consumption.

[0002]

[Prior Art]

 In a conventional capacitive coupling type input device, a coordinate input panel surface composed of a plurality of electrode lines arranged in the coordinate axis direction and a coordinate pointing device (a coordinate input device for abutting a desired position on the input panel surface to perform coordinate input ( The pulse signal applied to the electrode wire of the coordinate input board is detected by the signal generated in the detection electrode of the coordinate pointing device by electrostatic induction with the signal detection pen). In recent years, a low power consumption information input device has been desired as an input terminal device for battery-driven figures and characters. Japanese Unexamined Patent Publication No. 2-272617 discloses a power saving method of turning off the power of a predetermined circuit if a signal is not detected from the coordinate instruction unit within a predetermined time in order to suppress power consumption.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional input device, even if a signal is detected from the coordinate indicator by a predetermined time, the coordinate data calculation time is based on the position where the coordinate indicator is in contact with the coordinate input board surface and the pulse signal is sequentially applied to the electrode wires. If the coordinate data is transmitted to the computer, if there is a variation in the transmission interval when the coordinate data is transmitted to the computer, the reception process of the coordinate data of the computer may not be in time, or the coordinate pointing device Since it is not possible to check the moving speed of the coordinate data, the coordinate data is sent at a specified time interval.If the calculated time interval of the coordinate data is faster than the send time interval, it waits until the specified time. Alternatively, the coordinate data calculation process is performed again, and power is wasted.

[0004]

Means for Solving the Problems The present invention has been made in view of the above-mentioned conventional inconveniences, and a coordinate input panel including a plurality of electrode lines arranged in the coordinate axis direction and a pulse signal to the electrode lines. An applied decoder driver section, a coordinate pointing section that capacitively couples with the pulse signal applied to the electrode line to perform signal detection, and signal processing that calculates the signal detected by the coordinate pointing section as position coordinates. In the information input device including the parts, when the coordinate position is determined faster than the set predetermined time, the information input device that turns off the power of the decoder driver until the predetermined time is proposed.

[0005]

[Action]

 The information input device of the present invention suppresses power consumption by changing the set time according to the fixed time of the position coordinates.

[0006]

【Example】

 Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram of an electrical block of the present invention. Reference numeral 1 is a coordinate input board, in which electrode lines 2 and 3 are arranged at predetermined intervals in two orthogonal directions (X direction and Y direction). Reference numerals 4 and 5 are decoder drivers in the X and Y directions, respectively, and sequentially apply scanning pulses to the electrode lines 2 and 3 according to an address signal AD supplied from a central processing unit (CPU) 6.

Reference numeral 7 is an input pen that is a coordinate pointing device, and reference numeral 8 is arranged at the tip of the input pen 7 and is slidably held by being pressed against the surface of the coordinate input board 1 of the input pen 7. It is a detection electrode. Reference numeral 9 is a switch that opens and closes according to the sliding movement of the detection electrode 8. Reference numeral 10 denotes a signal processing unit, which includes an amplifier 11 for amplifying a signal electrostatically coupled to the electrode wires 2 and 3 generated in the detection electrode 8, a bandpass filter 12, a detection circuit 13, and an analog-digital converter 14. It is configured. The output of the signal processing unit 10 is applied to the CPU 6.

The CPU 6 is further connected to a clock oscillator 15, an up counter 16, a timer comparator 17, and a timer register 18. The value of the up counter 16 which counts the clock from the clock oscillator 15 and the value of the timer register 18, which can arbitrarily set the counter (preset) value, are compared by a timer comparator to detect a match.

Next, the operation will be described according to the flowchart of FIG. When the operator touches the surface of the coordinate input board 1 with the input pen 7 to perform input, the CPU 6 applies the address signal AD to the decoder drivers 4 and 5, and sequentially applies the pulse signal to predetermined electrode lines. At the same time, the timing pulse TP is supplied to the analog-digital converter 14, and first the initial value of the count value of the timer register 18 is saved in the memory. (S1) Subsequently, the initial value of the count value of the timer register 18 is set in the timer register. (S2) Further, the up counter 16 is cleared and started. (S3) It is confirmed whether or not there is a signal generated by the detection electrode 8 via the signal processing unit 10 after this setting is completed. (S4) If there is an input signal from the signal processing unit 10, the coordinate data is calculated based on the converted digital value. (S5)

After the coordinate position is fixed by the timer comparator 17, the signal processing is stopped until the remaining time of the set time set by the timer register 18, and the coordinate position data is sent (S7). Return to operation.

If no input signal is detected from the input pen 7 in step 4, it is confirmed whether or not it is the initial setting time of the timer register 18. (S8) If it is not the initial setting time, the process returns to step 4. When it is confirmed in step 8 that the preset time has been reached, the previous count value of the timer register 18 is loaded from the memory to the timer register 18. (S9) Next, it is confirmed whether the count value of the timer register 18 is the maximum value that can be set. (S10) If the maximum value has not been reached yet, the signal from the CPU 6 sets the set value of the timer register 18 more than the previous time. Enlarge. (S11)

If the maximum count value is found in step 10, or if the set value of the timer register 18 is made larger than the previous value by the signal from the CPU 6 in step 11, the count value at this time is saved in the memory. I will (S12) Next, this count value is set in the timer register 18. (S13) After this, the up-counter 16 is cleared and started. (S14) In this state, the signal processing operation is stopped by the timer comparator 17 until the count values of the up counter 16 and the timer register 18 match, and (S15) the process returns to step 2.

[0013]

[Effect of the device]

 Since the present invention has the above-mentioned configuration, power consumption can be suppressed not only when the operator moves the input pen away from the coordinate input panel, but also because no unnecessary signal processing operation is performed during the input operation. Is.

[Brief description of drawings]

FIG. 1 is an electrical block configuration diagram.

[Fig. 2] Flow chart

[Figure 3] Waveform diagram

[Explanation of symbols]

 1 coordinate input board 2 electrode wire 3 electrode wire 4 decoder driver 5 decoder driver 6 CPU 7 input pen 8 detection electrode 9 switch 10 signal processor 11 amplifier 12 bandpass filter-13 detection circuit 14 analog-digital converter 15 clock Transmitter 16 Up counter 17 Timer comparator 18 Timer register

Claims (1)

[Scope of utility model registration request] 1. A coordinate input panel comprising a plurality of electrode lines arranged in a coordinate axis direction, a decoder driver unit for applying a pulse signal to the electrode lines, and a capacitive coupling with the pulse signals applied to the electrode lines. Coordinate indication part that performs signal detection by
In an information input device including a signal processing unit that calculates a signal detected by the coordinate designating unit as a position coordinate, when the coordinate position is determined faster than a set predetermined time, the power supply of the decoder driver until the predetermined time. An information input device characterized by turning off.