SU1192138A1 - Sensory board - Google Patents

Abstract

1. A TOUCH PANEL containing a main n-channel fixation unit, a synchronizer and m sensor sensors, the clock inputs of which are jointly connected to the synchronizer output, characterized in that, in order to expand its functionality, the first h and the second elements AND, the former, the first and second elements OR, the mode switch and the decoderj the bits of which are connected to the outputs of the corresponding sensor sensors, V21, whose control is jointly connected to the synchronizer output through the driver, and the control input of the decoder is connected to the operating mode switch, and the decoder inputs corresponding to the sequential switching are connected to the corresponding installation inputs of the main ti-channel latching unit and the inputs of the first OR element, whose output is connected to the clock input of the main And-channel block fixation through the first element And the outputs of the decoder, corresponding to the parallel switching, are connected to the corresponding device The additional inputs of the additional h-channel latching unit and the inputs of the second element OR, the output of which is connected to the clock input of the additional h-channel latching unit through the second element AND, the other input of which is connected to the synchronizer output with the other input of the first element And, the Power inputs sensor sensors (L are connected to the power bus, the information inputs of the main and additional

Description

The invention relates to radio engineering and can be used in control systems.

The purpose of the invention is to expand the functionality by providing information from one touch keyboard to two controllable independent fixation units that have different operating modes: sequential and parallel switching, as well as by providing protection against spurious touch on the touch pads and ensuring the integrated performance of the device.

Figure 1 shows the functional diagram of the device; in Fig.2, the truth table with the switching functions of the decoder; on fig.Z time diagrams of the device

In FIG. 3, the following notation is taken: a is the signal at the synchronizer output; B is the signal at the shaper output; с, d, е - signals on D-inputs of D-triggers of sensor sensors; f - signals at the corresponding outputs of the device during sequential switching; q - signals on the corresponding outputs of the device with parallel code switching.

The proposed input device contains the main p-channel block 1 fixing, synchronizer 2 and p sensor sensors 3, the clock inputs of which are connected together to the output of synchronizer 2, Additional p-channel block 4 fixing, two elements And 5 and 6, the former 7, two the element OR 8 and 9, the switch 10 modes of operation and the decoder 11, the inputs of the bits of which are connected to the outputs of the corresponding sensor sensors 3, the inputs of which are connected together to the output of the synchronizer 2 through the driver 7, and the control input decoder 11 is connected to the switch 10 operating modes, and the outputs of the decoder 11, corresponding to the sequential switching, are connected to the corresponding installation inputs of the main fixing unit 1 and the inputs of the first element OR 8, the output of which is connected to the clock side of the main fixation unit 1 through the first element And 5 , the outputs of the decoder 11, corresponding to parallel switching, are connected to the corresponding installation inputs of the additional fixing unit 4 and the inputs of the second element OR 9, the output of which is under Switched to the clock C-in of the additional fixing unit 4, through the second element 6, the other input of which, together with the other input of the first element 5, is connected to the output of the synchronizer 2, inputs the power supply of the sensor sensors 3 are connected to the power bus, the information inputs of the main unit 1 and an additional fixing unit 4 are connected to the common bus, and their outputs serve as the device outputs, D-flip-flop 12, the direct output of which is connected to the sensor output 3, input C is connected to the input Sensor touch 3, D input is connected to LCD touch pad 13, thus to the D-input of D-flip-flop 12 connected to the output controlled switch having a first input connected to the input Power sensor 3, and a second input connected to an input sensor 3 Control.

A voltage pulse generator can be used as a synchronization block, and memory registers on triggers can be used as a fixation block.

Touch switch works as follows.

In the initial state, the decoder 11 with the help of the switch 10 operating modes is switched on to one of the possible decryption modes - serial or parallel. With sequential switching, the operator acts on the sensor pad 13 of one of the m sensor sensors 3, depending on the input information, and when parallel switching (code input) the operator can act on several sensor sensors 3.

In the sequential switching mode, the decoder 11, by supplying a signal from the switch 10 operating modes to the control input, decrypts the signals at the respective outputs connected to the inputs of the n-channel main fixing unit 1. The synchronizer 2 cyclically closes the D-inputs of D-flip-flops I2 and sensor sensors via C-input 0 of flip-flop 12. Shaper 7 generates pulses of a set duration along the leading edge of a sequence of pulses of synchronizer 2. Shaper of shaper 7 is fed to inputs Control and control The input of the key 14 of the sensor sensors 3. By opening the key 14 through the control input, the supply voltage from the input is supplied to the sensor pad 13 of the sensor 3. As a result, the charge of the parasitic capacitances of the touch pads 13 of the sensing sensors 3 is emitted. When the pulse ends, the key I4 of the touch sensors 3 closes and the parasitic capacitances of the touch pads 13 are discharged. If the operator turns to the touch sensor 3, the capacitance value the touch pad 13 increases and, consequently, the charge time И and discharge of this capacitance to zero potential increases, since the resistance of the discharge circuit remains constant for all of the touch sensors 3. Duration The eerie between the leading edge of the pulse of the imaging unit 7 and the leading edge of the pulse of the synchronizer 2 is established (by changing the pulse width of the imaging unit 7 / such that the capacitances of the touch pads 13 of those sensor sensors that were not addressed by the operator can be discharged to a potential zero; In this case, when clocking the C-inputs, the D-triggers of the 12 sep. Weed sensors 3, to which the operator has not been accessed, are set to the zero state, and those that were accessed by the operator are in the unite state, since at the time of clocking The capacitance of the sensor areas I3 of these sensor sensors 3 is still unloaded and has the potential perceived by the D input of D flip-flop 12 as a logical unit. Thus, at the outputs of the sensor sensors 3, a combination is made comprising one unit, which is decrypted by a signal at the corresponding output of the decoder 11. This signal sets the corresponding channel of the n-channel main fixing unit 1 to the one state via the installation S-input. At the same time, through the element OR 9, the synchronizer 2 pulse passes through the first element AND 5 to the clock C input (1-channel main fixing unit 1, which converts all other channels of the fixing unit 1 to the zero state. Translation to the zero state is provided by feed a constant level to the -O-input of the fixation unit I from the common bus. If the operator makes an erroneous access to several sensor sensors 3 at once, then the resulting combination at the outputs of the sensor sensors 3 will contain the number of units, similarly from one, and because of this, the decoder I1 will not generate a signal at its outputs, and the I-channel main fixing unit 1 will retain the previous state.When switching the operating mode switch IO, the decoder II decrypts the combination of input signals containing one unit. and decryption of combinations with more than one units is allowed, in which case a signal is generated at the corresponding output of the decoder 11 connected to one of the installation inputs of the g-channel supplementary unit and 4 fixings. The installation of the corresponding channel of the additional fixing unit 4 into one state is similar to the installation of the main fixing unit 1. The operator enters information in this mode by accessing several sensor sensors 3 simultaneously, for example, in accordance with a binary code. The transition from sequential switching to normal / code) and back does not entail a change in the state of the C-channel main I and additional 4 latch blocks, which allows independent changes of the states of the blocks I and 4 latch relative to each other using one and same sensor sensors 3.

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Claims (2)

1. A SENSOR PANEL containing a main η-channel fixation block, a synchronizer and sensor sensors, the clock inputs of which are jointly connected to the synchronizer output, characterized in that, in order to expand the functionality, an additional I-channel fixation block is introduced into it, the first and second elements AND, the shaper, the first and second elements OR, the mode switch and the decryptor are connected to the output of the synchronizer through the shaper, the control input of the decoder connected to the mode switch, and the inputs of the decoder corresponding to sequential switching connected to the corresponding installation inputs of the main η-channel latching unit and the inputs of the first OR element, the output of which is connected to the clock input of the main I-channel block fixation through the first element AND, decoder outputs corresponding to parallel switching are connected to the corresponding installation inputs m of an additional I-channel block of fixation and the inputs of the second OR element, the output of which is connected to the clock input of the additional ή-channel block of fixation through the second element And, the other input of which, together with the other input of the first element And is connected to the output of the synchronizer, while the inputs sensors are connected to the power bus, the information inputs of the main and additional i-channel fixation blocks are connected to the common bus, and their outputs are connected to the outputs of the device. 2. Panel by π. 1, about t l and -. which means that each sensor contains a C-trigger, the direct output of which is connected to the output of the sensor, input C is connected to the input of the Sensor sensor clock, the D-input is connected to the sensor pad, and the controlled output is connected to the L-output of the D-trigger a key, the first input of which is connected to the Power sensor input, and the second input is connected to the Touch sensor control input.