CN2466602Y

CN2466602Y - Identical substrate two-dimension coordinate detecting device

Info

Publication number: CN2466602Y
Application number: CN 01203959
Authority: CN
Inventors: 陈明德
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-02-02
Filing date: 2001-02-02
Publication date: 2001-12-19
Anticipated expiration: 2011-02-02

Abstract

The utility model discloses an identical substrate two-dimensional coordinates detecting device. The upside, the underside, the left and the right of the resistive film parent metal of the identical substrate are respectively provided with a series of electrically conductive line segments which are regarded as X, Y coordinates layers, and the other resistive film parent metal is regarded as a detecting layer; the electric conductive line segments which are arranged on the substrate are connected in series with each other by the resistive film of the detecting layer, and changes of resistance value between each electrically conductive line segment presents linear conditions from low to high. When two layers of resistive film are pushed and pressed, Px and Py coordinates which is a pushing and pressing point obtained by coordinate layers of the resistive film is transferred to an external control circuit by the detecting layer. The utility model can detect the X, Y coordinates easily, and has the advantage of low noise, simple structure and good mass production.

Description

With basic unit's two-dimensional coordinate detection device

It is a kind of with basic unit's two-dimensional coordinate detection device that the utility model provides, and refers to a kind of same basic unit two-dimensional coordinate detection device of new construction especially.

General resistance pressure sensing coordinate entering device (as shown in Figure 1) is to be made of upper and lower two layers of resistive film at present, be that X layer and Y layer and a slice control circuit board constitute, left and right side at X layer resistive film is respectively laid an electrode, be respectively X+ and X-, upper and lower electrode Y+ and the Y-that also be provided with at Y layer resistive film, at two layers of resistive film X+ and each input of Y+ electrode place certain voltage Vcc is arranged, when pushing two layers of resistive film, obtain Vx and Vy magnitude of voltage by the Y-electrode of Y layer and the X-electrode of X layer, can obtain coordinate figure by the A/D converter on the external control circuit plate again.

The control of the circuit of this configuration mainly is that X+, X-, Y+, the Y-by four Ports (I/O) brings in the conducting of control electric crystal Q1～Q4 and close (as shown in Figure 2).

On X+ electrode on the X layer resistive film and X-electrode, meet electric crystal Q1 and Q2 respectively, on the Y+ electrode of Y layer resistive film and Y-electrode, meet electric crystal Q3 and Q4 respectively, at X+ and Y+ electrode through electric crystal Q1, behind the Q3 input certain voltage Vcc, on pushing two layers of resistive film during any point, making electric crystal Q1 is ON, electric crystal Q2 all is the ON state, its X-electrode then is ground connection, ought be connected in the Y+ of Y layer and the electric crystal Q3 of Y-electrode in addition, when Q4 is OFF, make the Y layer be in off-state, because X layer and Y layer resistive film are the contact conducting state when pressing, the Y layer is disconnected, its AD-X that is connected to the Y-electrode can detect a magnitude of voltage Vx, A/D converter by peripheral control unit converts the numerical digit coordinate to again, can obtain the X coordinate.

Moreover, electric crystal Q3 is ON, and its Y+ electrode input has certain voltage Vcc, and electric crystal Q4 also is ON, the Y-electrode then is a ground connection, and the electric crystal Q1, the Q2 that are connected in X layer X+ and X-electrode are OFF, even the X layer is in the state of disconnection, present when contact when pushing two layers of resistive film, because the X layer disconnects, its AD-Y that is connected to the X-electrode just can detect a magnitude of voltage Vy, convert the numerical digit coordinate to through the A/D converter of peripheral control unit again, can obtain the Y coordinate.

Resistance pressure sensing coordinate entering device according to the said method making: on two layers of resistive film base material, form X coordinate layer and Y coordinate layer respectively, simultaneously at two layers of resistive film (X, Y) a lateral electrode X+ and Y+ all need import certain voltage Vcc, do to switch mutual energising by four electric crystal Q1-Q4 again, so when pushing two layers of resistive film, can obtain Vx and Vy magnitude of voltage by the X-electrode of X layer and the Y-electrode of Y layer, because Vcc constantly switches between two layers of resistive film, so detect to such an extent that magnitude of voltage is unstable and be easy to generate noise (noise), be by two layers of resistive films conduction because of Vx and Vy magnitude of voltage in addition, so the press points Px of X layer resistive film is a linear change to the press points Py of interelectrode resistance of X-and Y layer resistive film to the interelectrode resistance of Y-, when pushing two layers of resistive film a bit, detected magnitude of voltage Px and Py must be equivalent, think that reaching this purpose must want two layers of resistive film all to be identical inhomogeneity resistive film could to constitute the purpose that coordinate detects.

From the above, the formation of existing resistive film coordinate detection device is very complicated and input is difficult, be unfavorable for a large amount of upward uses of producing, how manage to solve input and the high shortcoming and inconvenience of material cost that existing product causes, be relevant dealer and desire most ardently the direction place of studying improvement.

The purpose of this utility model is to utilize a kind of novel structure to form planar coordinate detection device, mainly on same basic unit resistive film base material, down, a left side, the right side respectively is furnished with a row conduction line segment as X, Y coordinate layer, and with another resistive film base material as detection layers, and the polyphone of the intersegmental resistive film by detection layers of conduction line segment on coordinate and conductor wire makes the intersegmental resistance change of conductor wire present a linear condition from low to high, after pushing two layers of resistive film, press points Px and Py coordinate in coordinate layer gained just conduct to outside control circuit by detection layers, and reach the purpose that coordinate detects, can solve simultaneously because of voltage vcc continuous noise (Noise) of switching on and being caused alternately that switches on two layers of resistance.

The purpose of this utility model is achieved in that a kind of with basic unit's two-dimensional coordinate detection device, on same basic unit resistive film base material, down, a left side, the right side respectively is laid with a row conduction line segment as X, Y coordinate layer, and with another resistive film base material as detection layers, and the intersegmental resistive film polyphone by detection layers of conduction line segment in basic unit and conductor wire, each resistance change of conducting electricity between the line segment presents a linear condition from low to high, press points Px that the coordinate layer obtains when pushing two layers of resistive film and Py coordinate conduct to outside control circuit by detection layers, reach the purpose that coordinate detects.

The conduction line segment periphery of this basic unit adds the conduction line segment of row as the complementary state of voltage compensation.

The conduction line segment of this basic unit is connected on the extraneous control circuit with lead.

Wherein this detection layers is connected on the control circuit device as input of detection layers coordinate or armed state with lead.

The utility model can detect X, Y coordinate easily, and can reduce noise, and it is simple in structure, helps a large amount of productions.

Below in conjunction with the drawings and specific embodiments the utility model is further described.

Fig. 1 is the structural representation of existing coordinate entering device.

Fig. 2 is the system schematic of existing coordinate entering device.

Fig. 3 is the system schematic of the utility model coordinate entering device.

Fig. 4 is the configuration schematic diagram of the utility model base conductive layer line segment.

Linear condition synoptic diagram when Fig. 5 is the action of the utility model X coordinate layer.

Linear condition synoptic diagram when Fig. 6 is the action of the utility model Y coordinate layer.

Shown in Fig. 3,4, be respectively the system schematic of the utility model coordinate entering device and the configuration schematic diagram of base conductive layer line segment.Can find out that configuration of the present utility model is that X, Y electrode directly are distributed on the resistive film of same basic unit 1 by clear among the figure, and detection layers 2 is only as the conduction purpose, need not make that two layers of resistive film is identical to be inhomogeneity resistive film base material, and can reach the purpose that reduces cost, yet, desire to reach the purpose that X, Y coordinate detect, still needing comprises that following each device begins to finish:

(1) around same resistive film basic unit 1, respectively is provided with a row conduction line segment 11 and constitutes the resistive film bleeder mechanism.

(2) around conduct electricity peripheral each input of line segment 11 and one row conduction line segment 11 arranged as voltage compensating device.

(3) respectively being provided with a lead 12 around conduction line segment 11 is linked on the external control circuit.

(4) with a resistive film base material as coordinate detection layers 2.

Above-mentioned four angles with the conduction line segment 11 in the basic unit 1 are made input voltage and earth terminal respectively, and be connected to conduction line segment 11, voltage source and earth terminal in the resistance basic unit 1 by a plurality of electronic switching elements, more comprise the electronic switching element that a control detection layer 2 input and armed state use and constitute.According to above-mentioned structure, the utility model includes the basic unit 1 that the resistive film base material makes and is distributed in the X of the conduction line segment 11 around basic unit 1 top, Y coordinate layer, detection layers 2 and control circuit element constitute, around same resistive film base material, respectively be furnished with a row conduction line segment 11, respectively be provided with a lead 12 at four angles of conduction line segment 11 and be connected to electric crystal Q1-Q6 on the external control circuit, and electric crystal Q1-Q6 is the voltage source that is connected on the control circuit, earth terminal and four outputs, go into port (I/O:XH, YH, XL, YL), end on the detection layers 2 is laid with the last device as input of detection layers 2 coordinates or armed state of electric crystal Q7 that a lead 21 is connected to control circuit in addition, four of control circuit I/O:XH wherein, YH, XL, the conducting that YL is controlling electric crystal Q1-Q6 is conducted electricity the voltage turn-on or the closed condition at four angles of line segment 11 with closing and controlling, the A/D-I of detection layers 2 then is connected on the A/D converter on the control circuit, therefore, the relation of the state of electric crystal Q1-Q6 and control end is as follows:

XH	Q1	Output	XL	Q2	Q3	Output
XH	Q1	Output	XL	Q2	Q3	Output		0	ON	+5V	0	ON	OFF	+5V
1	OFF	+5V	1	OFF	ON	0V		0	ON	+5V	0	ON	OFF	+5V
1	OFF	+5V	1	OFF	ON	0V	YH	Q4	Q5	Output	YL	Q6	Output
0	ON	OFF	+5V	0	ON	+0V	YH	Q4	Q5	Output	YL	Q6	Output
0	ON	OFF	+5V	0	ON	+0V	1	OFF	ON	0V	1	OFF	+0V

Can find out that electric crystal Q1 is connected to certain voltage in the upper left corner of conduction line segment 11 on the resistive film base material by clear in the above-listed form, the lower right corner of conduction line segment 11 then is connected to earth terminal by electric crystal Q6 on the resistive film base material, electric crystal Q2, Q3, Q4 and Q5 then are connected in the upper right corner and the lower left corner of conduction line segment 11, change in order to control X and Y direction, and can obtain Xv and Xy magnitude of voltage, the electric crystal Q7 that is connected by detection layers 2 conducts on the A/D converter on the control circuit again, reaches the purpose that coordinate detects with this.

On the resistive film base material, down, a left side, the right four row conduction line segments of being laid 11,11 connecting of its conduction line segment 11 and conduction line segment by resistive film, and effect is equivalent to conduct electricity 11 on line segment and is connected with a resistor, so when electric crystal Q1 sends the upper left corner that certain voltage is connected to conduction line segment 11, electric crystal Q6 just will conduct electricity the lower left corner ground connection of line segment 11, and this moment, electric crystal Q2 was OFF, electric crystal Q3 is the state that is ON, the upper right corner of conduction line segment 11 then is ground state, in addition, when electric crystal Q4 is ON, when electric crystal Q5 is the state of OFF, the lower right corner of its conduction line segment 11 then connects certain voltage, left column conduction line segment 11 permutations that make basic unit 1 are for just, 11 permutations of right row conduction line segment are for negative, on, the variation of voltage from left to right of following conduction line segment 11 forms the linear condition (as shown in Figure 5) by high step-down, and detected magnitude of voltage is Vx, when electric crystal Q2 is ON, when electric crystal Q3 is the state of OFF, the upper right corner of its conduction line segment 11 is connected with certain voltage, in addition, when electric crystal Q4 is OFF, when electric crystal Q5 is the state of ON, then conducting electricity the lower left corner of line segment 11 is ground connection, at this moment, the top permutation conduction line segment 11 of its resistive film base material is for just, below permutation conduction line segment 11 is for negative, the left side of resistive film in addition, right row conduction line segment 11 basipetal change in voltage form linear condition (as shown in Figure 6) from high to low, and the magnitude of voltage that detects is Vy, above-mentioned formed state, the resistance of its resistive film must be higher than and conducts electricity the resistance of line segment 11, the distance of each conduction line segment 11 also needs identical simultaneously, two ends of working as a row conduction line segment 11 under this situation are for connecing timing, because of being contacted by resistive film between conduction line segment 11 and the conduction line segment 11, its effect is equivalent to conduct electricity and is connected with a resistance between the line segment 11, so between conduction line segment 11 and conduction line segment 11, just can produce pressure drop, and the linear distortion of formation, for improving this situation, must add a row conduction line segment 11 again in conduction line segment 11 outsides and use on as voltage compensation.

Claims

1. one kind with basic unit's two-dimensional coordinate detection device, it is characterized in that: respectively be laid with a row conduction line segment in the upper and lower, left and right of same basic unit resistive film base material as X, Y coordinate layer, and with another resistive film base material as detection layers, and the intersegmental resistive film polyphone by detection layers of conduction line segment in basic unit and conductor wire, each resistance change of conducting electricity between the line segment presents a linear condition from low to high, and press points Px that the coordinate layer obtains when pushing two layers of resistive film and Py coordinate conduct to outside control circuit by detection layers.

2, as claimed in claim 1 with basic unit's two-dimensional coordinate detection device, it is characterized in that: the conduction line segment periphery of this basic unit adds the conduction line segment of row as the complementary state of voltage compensation.

3, basic unit as claimed in claim 1 two-dimensional coordinate detection device is characterized in that: the conduction line segment of this basic unit is connected on the extraneous control circuit with lead.

4, basic unit as claimed in claim 1 two-dimensional coordinate detection device is characterized in that: wherein this detection layers is connected on the control circuit device as input of detection layers coordinate or armed state with lead.