SU1401593A2 - Touchless switch - Google Patents

Abstract

The invention can be used in input and output devices. The purpose of the invention is to increase the availability of functioning. The device is a soda () live multiplexer 1. touch pad 2, shaper 3 and polling pulses, D-triggers 4, 16, 17 and 18, registers 5 and 20, comparison fi block, counters 7, 8 and 12, decoder 9, elements OR 11, 13, 15 and element AND 19. The organization of protection against false triggering of an irregular touch of the touch field of an arbitrary configuration is achieved by introducing control touch sensor platforms 22, covering the perimeter of the touch platforms 2, as well as the digital comparator 24, And blocking element 23 and control bus 25. 2 Il.

Description

cl

with

Hj;

about

O1

with

with

(43

The invention relates to a pulse technique, can be used in information input and output devices, and is an improvement of the invention according to the author. St. 092725.

The aim of the invention is to increase the reliability of the operation by providing protection against false triggering by inadvertently touching the touch field of an arbitrary configuration.

The goal is achieved by the introduction of control 10 sensory gigabytes, covering the perimeter of the group of protected sensory sensors, as well as a digital comparator, an AND blocking element and a control gauge.,

the pre-installation OR 11 and the inverse output go to the S-input of the D-lock trigger 17 and the second input of the OR element 13, the output of which is connected to the 5-input) -trigger 16 error, and the third input to the direct output D-flip-flop 4 and the second input of the OR 11 preset, the third input of which is connected to the output of the element AND 19, the second input of which is connected to the output of the comparison unit 6, and the control platforms 22 connection with additional information inputs of multiplexer 1, the output of the comparison unit 6 is connected to the fourth input the OR element 13 errors through the block element AND 23, the other input of which is coI figs. 1 shows a functional single with the output of the digital device. Parameter circuit of the touch switch; in fig. 2 shows an example of the execution of a touch-field switch with an arbitrary arrangement of the touch panels and control touch-sensitive platforms.

The touch switch contains a multiplexer 1, the information inputs of which are connected to the corresponding touch pads 2, the C input to the output of the poling device 3 polling pulses, the output to the S input of the D flip-flop 4 contacts, the control inputs to the corresponding information inputs of the register 5, the first inputs of the comparison unit 6 and the outputs of the main counter 7, whose C input is connected to the high bit output of the auxiliary counter 8 and the high bit input of the decoder 9, the second bit of which is connected to the first output bit of auxiliary counter 8, input of the first bit with clock bus 10 and C-input of auxiliary counter 8, first output with C-input of D-flip-flop 4 tangles and input of shaper 3 polling pulses, second output with the first input of element OR 11 presets, the third output - with a C-input additional score20

25

thirty

35

24, the first inputs of which are connected to the control bar 25, and the second inputs to the outputs of the main counter 7, in which case the control platforms 22 are made in the form of frames, each of which covers around the perimeter one or more touch pads 2 and electrically isolated from them.

The operation of the touch switch is built on a cyclical basis. The cycle consists of n () lines, where M and P are the number of sensory and control sites, respectively. The line consists of 8 cycles. The cycle time T / 2 is equal to the duration of the clock pulses received via the clock bus 10. In each row, one touch or control pad is scanned, and all sites are polled during the cycle. The control signals necessary for the operation of the touch switch according to the cyclic principle are formed by the main 7 and auxiliary 8 counters and the decoder 9. If this is the conversion factor of the main counter 7-n, and the conversion factor of the auxiliary counter 8-4, and they respectively determine the total number sensory and

12, the first input of the element OR 13 40 control sites and the number of cycles

error and 5-input D-trigger 14 record, and the fourth output - with the first input element OR 15 record, the second input of which is connected to the direct output of the D-trigger 16

in the source line.

In sequence with auxiliary counter 8, the main counter 7 is switched on. Sequential change of the error state, the third input - to the inverse input of the main counter moves leads to a different D-trigger 17 for blocking, the fourth input - to the forward output of the D-trigger 18 of the control 19 and the C-input of the D-flip-flop 16 is faulty, and the output - to the C-input of the D-flip-flop 17 and the C-input of the output - pogo register 20, the outputs of which are connected to the output buses 21, and the information inputs with the second inputs of the block 6 comparison and the outputs of the register 5, C-in The one of which is connected to the direct output of the D-trigger 14 of the record, the C-input of which is connected to the direct output of the D-trigger 18 of the control, the C-input of which is connected to the output of the additional counter 12, the S-input to the /-input of the additional counter 12 and vy50

Interrogation of information inputs of multiplexer 1 connected to the corresponding sensor 2 and control 22 sites. All sensor and control pads of the switch are returned for n lines.

The touch switch has five characteristic modes of operation: operation in the absence of contact between the areas of the touch field; functioning when touching one touchpad- 55; functioning by inadvertently touching two or more touch pads; operation when an inadvertent touch of one control element of the OR 11 preset, and an inverse output to the S input of the D-trigger 17 for blocking and the second input of the OR element 13 error, the output of which is connected to the 5 input) trigger of error 16, and the third input - with the direct output of the D-flip-flop 4 tangles and the second input of the OR 11 preset, the third input of which is connected to the output of the And 19 element, the second input of which is connected to the output of the comparison unit 6, and the control pads 22 connection are additional information. mi multi inputs leksora 1, comparing the output of block 6 is connected to a fourth input of OR gate 13 through AND gate error lock 23, the other input of which is connected with the output digital ko.mparato0

five

0

five

24, the first inputs of which are connected to the control bar 25, and the second inputs to the outputs of the main counter 7, in which case the control platforms 22 are made in the form of frames, each of which covers around the perimeter one or more touch pads 2 and electrically isolated from them.

The operation of the touch switch is built on a cyclical basis. The cycle consists of n () lines, where M and P are the number of sensory and control sites, respectively. The line consists of 8 cycles. The cycle time T / 2 is equal to the duration of the clock pulses received via the clock bus 10. In each row, one touch or control pad is scanned, and all sites are polled during the cycle. The control signals necessary for the operation of the touch switch according to the cyclic principle are formed by the main 7 and auxiliary 8 counters and the decoder 9. If this is the conversion factor of the main counter 7-n, and the conversion factor of the auxiliary counter 8-4, and they respectively determine the total number sensory and

in the source line.

The main counter 7 is switched on in series with the auxiliary counter 8. Sequential change of the state of you

Interrogation of information inputs of multiplexer 1 connected to the corresponding sensor 2 and control 22 sites. All sensor and control pads of the switch are returned for n lines.

The touch switch has five characteristic modes of operation: operation in the absence of contact between the areas of the touch field; functioning when touching one touch pad; functioning by inadvertently touching two or more touch pads; operation by inadvertently touching one control platform; operation when the control and touch pads are inadvertently touched.

Consider the operation of the touch switch in these modes.

In the first cycle of each row, the negative-control control pulses from the first output of the decoder 9 arrive at the C input of the D-flip-flop 4 contacts and the input of the driver 3 of the polling pulses. At the output of the imaging unit 3, short polling pulses of negative polarity are generated along the positive front of the control pulses. These pulses arrive at the gating C input of multiplexer 1 and, in the absence of contact between the pads 2, the sensor field passes to its output in the form of pulses of the same polarity. From the output of multiplexer 1, the pulses arrive at the S-input of the O-thrgger 4 contacts. In this case, the D-trigger 4 contacts is first set to the zero state by the positive edge of the control pulse, and then immediately returned to the initial single state by a negative polarity pulse from the output of the multiplexer 1. At the output of the 4-touch trigger, negative pulses are generated polarities due to the total delay in the propagation of a signal in the driver 3 polling pulses and multiplexer 1. However, the duration of these pulses is significantly less than G / 2 logical level "1 from the direct output. O-flip-flop 4 touching blocks the elements OR of the preset 11 and the error 13 in the subsequent cycles of this line. At the outputs of the elements OR 11 and 13 in these cycles there is a logical level “1.

In the fifth cycle, the lines controlling them, the pulses of the negative polarity, and from the third output of the decimator 9 arrive at the 5th input of the D-trigger 14 of the record and the C input of the additional counter 12. The first of these pulses after turning on the power supply sets /) trigger 14 records in a single state. Subsequent pulses only confirm this condition of the trigger 14 recording. At the direct output of the D-flip-flop 14 of the record, there is a logic level “1. After switching on the power source, the control pulses from the third output of the decimator 9 are counted by an additional counter 12 with capacity N. When the additional counter 12 is filled to the value Ж, a positive differential from its output sets the control D-flip-flop 18 to the zero state. The logic level "O from the direct output of the D-trigger 18 of control closes the element AND 19. At its output, the logic level" O is also set. The logic level "1 from the inverse output of the control D-flip-flop 18 additionally blocks the OR element 13 of the error. In the future, additional counter 12 continues to count

control pulses arriving at its C input in the fifth cycle of each row. However, the positivity of the drops from its output only confirms the zero state of the D-flip-flop 18 of the control.

In the seventh cycle, the negative-polarity control pulses from the fourth output of the decipheror 9 are received at the input of the OR 15 entry. Wherein,

Since, when the power supply is turned on, the D-triggers 16 and 17, errors and locks, respectively, can be set to an arbitrary state, two cases are possible. In the first, the D-flip-flop 16 error is set to the zero state, and the D-flip-flop 17

5 blocking - in the unit. From the direct output of the D-flip-flop 16 error and the inverse output of the D-flip-flop 17 locking, the logical element “O The same level goes to the element OR 15 records from the direct output

 D-trigger 18 control. In this case, the first control pulse, having passed through the logical element OR 15 of the record, with the positive edge, will set the D-trigger 17 of the lock to the zero state. On the inverse

5, the output of the D-flip-flop 17 is a logical level of "1 and locks the OR 15 entry. The following control pulses do not pass through the OR 15 element. In the second case, D-triggers 16 and 17 errors and blockings, respectively

0 is set to such a state in which the first or second, or both, simultaneously block the OR element 15 of the record. Thus, in the absence of touch between the touch pads 2, the binary code on the information buses 21 does not change.

5 When touching any one sensor, for example, i-th, platform 2, the capacity of the operator’s body is added to the mounting capacity of this platform and the capacity of the rth information input of multiplexer 1. Total

Q capacitance does not have time to charge to the logical level "1 during the time of the short polling pulse and in the / and row of each cycle the pulses do not pass to the output of multiplexer 1. At the same time, the first pulse of the first output The decoder 9 sets the 4-touch D-flip-flop to the zero state, in which it remains until the end of the first clock cycle of the next line. The logical level “О from the direct output of the D-flip-flop 4 touches unlocks the elements OR 1 1 presets and

0 error 13 in subsequent cycles of this line.

In the third cycle of the rth row, the control pulse of negative polarity from the second output of the decoder 9 passes to the output of the OR AND AND preset element, resetting the triggers of the add-ons to the zero state. resident counter 12 and set to one state D-trigger 18 control. Positive voltage drop with p

the output of the control D-flip-flop 18 sets the zero state to the /) - write triggers 14 and errors 16. The logical level "1 from the direct output of the control D-flip-flop 18 unlocks AND 19 and locks the OR 15 element on one of the inputs. The level of the logical "About with inverse output) -trigger 18 control unlocks the element OR 13 errors and sets in one state) the locking trigger 17. The logical level “About from the direct output of the L-flip-flop 14 of the record overwrites the binary code number r-th tangent touch panel, ad 2 from the main counter 7 to the register 5. At the same time in the / and row of each subsequent cycle to the block inputs 6 comparisons receive the same codes, and at the output of block 6 there is a logical level "1. This level is fed to the input of the element And 19, which opens, and the level of logical "1 from its output blocks the element OR 11 of the preset.

The logic level "1 from the output of the comparison block 6 also goes to the input of the blocking element AND 23, opening it along this input. A signal from the output of the digital comparator 24 arrives at the other blocking element input AND 23. The digital comparator 24 compares the code received from the outputs of the main counter 7 with the code specified by the control bus 25. In case the code value on the control bus is greater than code at the outputs of the main counter, at the output of the digital comparator there is a logic level “1, otherwise - a logic level“ O. Thus, if the number of sensor pads 2-M is set on the control bus, then when polling the sensor pads 2 connected to the first (0-) information inputs of multiplexer 1, the output level of the digital comparator 24 will be logical 1. When polling the control pads 22 connected to the subsequent (Mf-M + P-1) information inputs of multiplexer 1, at the output of the digital comparator 24 is the logical level "O. Consequently, since the other input of the And 23 blocking element also has the logical level "1 from the output of the digital comparator 24, the blocking element 23 and opens, and the logical level 1 from its output blocks the element OR 13 errors. The logical level "About with the inverse output of the D-flip-flop 17 locks one of the inputs of the OR entry 15 on one of the inputs.

In the fifth cycle, the rth control line, the i.p. pulse from the third output of the decipheror 9, sets the D-thrunger 14 of the record to one state. The control pulse does not pass to the output of the OR 13 element of error, since it is blocked by a logic level "1 from the output of the blocking element 23".

In each row, the same control pulses from the third output of the decoder 9 are also received at the C input of the additional counter 12 and are counted by it.

In the seventh cycle, the rth row

the pulse from the fourth output of the decoder 9 is fed to the input element of the OR 15 record. However, it does not pass to the output of this element, since the OR 15 element of the recording is blocked by the logical level "1 from the direct output of the O-trigger 18 control.

The touch switch works the same way when touching / / the touch pad and in subsequent (K-2) cycles. In the K-m cycle from the moment of the contact of the g-th touch pad to the C-input of the additional counter 12 from the third output of the decipher

9 a driving pulse is received. The highest bit of the additional counter 12 is set to one, and the positive difference with its

0 direct output sets to zero the control D-flip-flop 18. The level of the logical "About from the direct output /) - control trigger 18 releases the recording element OR 15 and the control pulse in the seventh

The 5th cycle of the same line passes through the OR element 15 of the record to the C input of the output register 20. The binary code for the number / -Y of the touch pad appears in the information slots 21.

Consider the operation of a touch switch when you inadvertently touch two of what, for example r-th and (/ - (- 2) -and, touch pads 2. In this case, following the moment of touch, for example r-th The cycle of the switch works in the same way as described. It is set to zero (5) standby-4 trigger, reset to the zero state triggers of additional counter 12, is set to O-trkgger 18 control unit, the binary code of the number / -and of the touch pad being rewritten from main counter 7 to register 5 and, finally, the / -thrigger 16 error is set to zero, and the D-flip-flop 17 is set to one. The next (/ - | -1) line of the same cycle interrogates (/ + 1) touch pad 2. Because there is no touch of this touch pad, the pulse from the output of the driver 3 polling pulses in this row goes to the output of multiplexer 1 and sets the 4-touch D flip-flop to one state. The logical level “I blocks in the subsequent cycles of this line logical elements OR errors 13 and preset II. The O-flip-flops 16, 18, 14, 17 of the error, control, recording and blocking respectively in (i- -l} -vi line do not change their state. In register 5, 5 i code stored in / -and line is saved -th touch pad. The write pulse to the C input of the output register 20 is not received, the states of the output boxes 21 do not change.

In the first cycle (/ -f) -th line of the same cycle, the control pulse from the first output of the decoder 9 sets the D-flip-flop to 4 touches to the zero state. Since the pulse from the output of the imaging unit 3 polling pulses in this line does not pass to the output of multiplexer 1, during the next clock cycles (/ - (- 2)) and the D-flip-flop 4 touch line will remain in the zero state. At the output of the D-flip-flop 4, it unlocks the elements OR of the preset 1 1 and the errors 13 in the subsequent clock cycles of the given line. (/ + 2) -and the line at the outputs of the main counter 7 contains the binary code of the number (i + 2). there is a binary code of the number L written in the / -th row; and the output of block 6 of the comparison is the logical level "O. This level goes to one of the inputs of the AND 19 and 23 elements. These elements are closed, and the logical level" O from the output of the AND 19 element unlocks the OR 11 preset, and the logical level "O from the output element AND lock 23 unlocks the element OR 13

In the third cycle (/ + 2) -and the negative-polarity control pulse from the second output of the decoder 9 passes to the output of the OR 11 preset, resetting the triggers of the additional counter 12 to the zero state and confirming the single state of the control trigger 18. The write flip-flop 14 remains in a single state. The rewrite of the binary code of the number (/ -f-2) from the main counter 7 to the register 5 is not performed.

In the fifth cycle (r + 2) -th line, the control pulse from the third output of the decoder 9 confirms a single state) -trigger 14 records, increments the content of the additional counter 12, and, passing through the open element OR 13 errors, sets to one condition) trigger 16 error. The logical level “1 from the direct output of this trigger blocks the element OR 15 records.

In the seventh cycle (/ + 2) -and the control pulse from the fourth output of the decoder 9 is fed to the input element OR 15 of the record. However, it does not pass to the output of this element, since the element is blocked. Code overwriting from register 5 to output register 20 is not performed. The binary code on the output buses 21 does not change. The touch switch works in a similar way when unintentionally. Touching three, four or more number of touch pads.

Consider the operation of the touch switch when you inadvertently touch any one, for example () th, control platform 22.

0

five

0

five

0

five

0

In the first clock cycle (. Ci, the control pulse from the first ()) output of the encoder 9 sets the n state to zero) a trigger 4 k.-to long. P () speed.1k impulse output ;. . (. 1 3 impu. Interrogation in this line does not pass through the output of the multiplexer. Then during the next cycles ()) the D-flip-flop 4 touch will remain in the state of state I. The logical level From the direct output of the D-flip-flop, 4 touches unlocks the first items OR presets AND and errors: 13 in subsequent cycles of this line.

In the third cycle (), the rows of the control pulse will negate m / G; polarity from the second output of de-pyphragor 9 passes the output of the element OR 11 and the installation step, dropping it to ny. IeBoc, the state of the tsr is the key of the additional counter 12 and is set to one control D-TpHri-ep 18. The voltage drop from the direct output and /) to the trigger 18 sets the D-triggers of the record 14 and the blue to the zero state 16. The logical level "O from the inverted output of the D-trigger 18 of the control will release the OR element 13 01 beeps and sets the D-flip-flop to 17 in one state.

In the polling rows of the k) 1 control platforms, at the output of the digital comparator 24 there is a logical level of “O, which closes the AND 23 blocking element. Therefore, in the fifth cycle (.Vf-jP-1) and the lines, the control impulse from the third output of the depot 9 is passed to the output of the first OR 13 13 and is set to the single D-trigger 16 o 1P1bki. The level / yugic “1 from the direct output D-Tpnrrcjia Hi errors blocks the element OR 15. Channs. The control pulse from the fourth decirator 9 through the element OR 15 .iiii; - C on the C input of the output pei-ister 20 in aiiiiiiic; -; and the subsequent lines are not n | 5 (X od1 :; The number on the output 1 pin 21 does not change.

Similarly, the touch switch works when unintentionally; touching the number of information and control sites of the touch screen; In the first cycle, the D-flip-flop 16 01 beacon in the polling line of the first control platform detects the presence of an error when touching and blocks the write pulse to the C input of the output register 20.

Thus, at the time of contact KaKoii- or site 2. 22 touch on. the proposed pen-rover runs o.kzh. containing .1: imitation counter 12 and D-flip-flop 18:,;. lenp. An additional 12 oTC4Hi counter, i-iaeT L cycles, during which it is checked, there is an кас touch at least one KOiiTpo, p. 22

or touching at least two touch pads 2. If during K cycles, i.e., during the 4 pTK time interval, only one touch pad of 2 pitch 2 is fixed, then the binary code of the number of information site 2 being touched is fixed to output register 20 and enters on the output bus 21. If there is a fixed touch of two or more touch pads 2 or a touch of at least one control pad 22, then the error information is recorded in the D flip-flop 16, which blocks the writing to the output register 20, and the code on the output flags 2 1 remains unchanged. The blocking of writing to the output register 20 is released only after counting K cycles in which several touch pads 2 did not touch, i.e., after the termination of an erroneous effect on the touch field of the switch.

In this case, the time interval of 4 GPGs should obviously exceed the transient time when touching / for the duration of the cycle and at the same time be not so long that the operator felt the delay /, of the moment the touch switch operated compared to the moment of touch of the touch pad,

  1k + 4p7xc.4pg / C. (1)

Transforming (1), we obtain the following relation for choosing the value

, +.

4pT4-PG

Claims (1)

The invention of the touch switch on the author. St. No. 10,92725, characterized in that, in order to increase the reliability of operation by organizing protection against false triggering when the touch field of an arbitrary configuration is inadvertently touched, control touch pads, a digital comparator, an interlocking element and a control bus are introduced into it. the pads are connected to the corresponding additional information inputs of the multiplexer, the output of the comparison unit is connected to the fourth input of the element OR errors through the AND blocking element, the other input is connected to the digital comparator output, the first group of inputs of which is connected to the control bus, and the second group of inputs to the corresponding outputs of the main counter, while the control touch pads are made in the form of frames, each of which covers along the perimeter one or more sensor sites and electrically isolated from them.