DE4415290A1 - Programmable media controller with matrix selection - Google Patents

Abstract

The programmable control device with matrix selection is simple to operate has any desired combinable switching functions and is programmed only using plug-in jumpers. On an 8 x 4 matrix, a function is selected and activated using only 4 control keys. This function can in turn be combined as desired with other functions and/or trigger switching or keying contact via relays. A plurality of matrix selection fields can be operated in parallel. The connection for each field is restricted to a few lines (cables). The size of the display fields can be produced as desired. Infrared operation is possible. The control unit is accommodated in a housing of 4 vertical modules and is fitted together modularly. It comprises the following modules: relay module (16X), connection module (4X), switching module (1X), analog module (2X). The printed circuit board relays are approved for up to 220 V/2000 VA. The programmable control device with matrix selection can serve as the foundation for further possibilities such as, for example, voice-activated remote control or display using neon (illuminated) writing.

Description

The invention relates to the reduction in electrical space functions and selection of media technology devices on a selection field. Such media controls are usually wired Lumita buttons or switch and keypads carried out.

Self-holding or mutually triggering or locked functions, and the representation of "false" (self-generated) and "real" (externally generated - by the devices used, e.g. video recorder, Image plate, large image projector, slide devices etc.) feedback in the form of illuminated keys, have to be wired elaborately. A Retrofitting is expensive and requires additional control lines and quickly makes the wiring confusing.

Programmable logic controllers are usually lacking the clear User level.

But even with some systems in the form of a touchscreen Monitors, LCD displays or integrated in IR remote controls Such displays always need inserts a PC programming.

Not just the controls themselves, but also reprogramming is very expensive, a "program crash" usually has the failure the entire system.

The invention is based on a middle ground in price and performance to find, taking into account the following points:

• 1. Clear user level in the form of a lamp or light diode matrix.
• 2. Simple operation by switching a horizontal and vertical 8 × 4 display. The function at the intersection can be activated.
• 3. Separation of display and control buttons; Reduction to four switching functions: right - left - level - trigger.  
• 4. Representation of a volume control and / or brightness control in the form of a further 8-fold display that only then activates as soon as the corresponding function is selected.
• Using optocouplers, 8 voltages are independent of the display values switched through.
• 5. The system can be plugged in using modular technology for 32 switches functions that
• a.) giving impulses (buttons)
• b.) self-holding
• c.) self-triggering (switch)
• d.) mutually locked (e.g. roller blind)
• e.) mutually triggering
• f.) mutually switching
• g.) giving impetus and holding display
• h.) stimulating or self-holding with externally controlled back report.
• i.) Status giving at switch-on moment.
• 6. Cascading of several displays and control panels through Redu Decoration and control lines for operation and display.
• 7. No computer programming required, just adjustment dip switches and wire jumpers. So none One-off production for customers but pre-producible.
• 8. Commercial and proven components from mass production to keep material costs down. No purchase of computers or special monitors for control.
• 9. Equipping the relay cards with 220 V approved Relay (max. 2 KVA)

Description of the circuit and modules

The display panel ( Fig. 3) consists of 64 LEDs. The transmission of the switching states to the LED display is based on the transmit and receive IC U6050 and U6052. Up to 8 switching states are transmitted serially per pair using two-wire technology, with the supply voltage of 12 V serving as the reference point. The U6052 enables control up to 200 mA. Even super bright LEDs can still be switched with it. 7 data lines or a cascading of 7 IC's are required for the function of the matrix display (56 messages).

The switching on to the switching module ( FIG. 4) is based on the combination of a counter module 40193 or 74193 and two eight-channel switching modules 4051 .

If a "low" pulse is applied to the counter module at the Cl input, which is otherwise set to "high", the addresses at the output switch forwards or backwards. Block 40193 starts with the highest priority when switched on. The addresses of two 4051 connected in parallel, which switch through 4 or 8 bus lines, are evaluated. A 4051 generates a "high" active relay bus for either rows AD or columns 1-8. The other IC also generates the "low" active display bus for AD or 1-8. The display bus switches through directly, while the relay bus is only activated by the Enabeleitung with the trigger button.

The display bus is ge on U6050 blocks for matrix selection display directs.

The relay bus is routed via 4 connection modules ( Fig. 5) to 16 relay modules, each with 2 relay circuits.

The connection modules each hold 8 information from the relay modules ("low" active) about the status of the feedback together and route them to a U6050 transmitter. The 4 data lines ge long over DIP switch back to the switching module, on which all data lines are tapped.

On the connection modules it is possible with "low" real feedback loop in.  

The relay modules ( Fig. 6) evaluate the information from row AD and column 1-8. A column and a row reach an IC 4066 via jumpers. If both pieces of information are "high", the relay is set after approx. 3 seconds - when "low" it drops out again. At the same time, the display is activated and a control pulse (program output) is set to "High" for as long as the switching from setting to switching takes. With this pulse other relay cards can be set or reset. For this purpose, each card has a separate set and reset input, which can be connected as required via connecting lines and jumpers. DIP switches ( 1/8 ) achieve self-holding, self-triggering ( 2/7 ) or separation ( 5/3 and 6/4 ) of the display and relay pulse.

Two logic circuits are provided for each relay card of two IC 7400, one IC 7402 and half IC 4066, and Transistors with charging electrons to generate the time constant of about 3 seconds.

If the column and row are "High", a "High" signal is switched through the 4066. If the switch is set to "Reset", only the upper path via the Nand gate 1.1 is possible, since "High" is output at gate 1.3 . After the inversion 1.2 , the Nor gate 2.3 switches "low" to the next Nor gate 2.4 . The "high" signal at the output is tapped, compared with the delayed output signal via gate 3.1 and passed briefly to the program output. Via the inverter 3.3 , the two transistors and the time constant from 47k and 100 µF, and the inverter 3.4 , a "high" signal reaches the output after approx. 3 seconds. This or the set signal from the input can be applied to the switching transistor of the relay via DIP switches. Furthermore, it will generate a latch via the DIP switch and the Nor Gate 2.3 . The lower path (reset) is enabled via gate 1.3 , the upper path (set) is blocked and a reset is sufficient via gates 2.1 , 2.2 and the time constants from 47k and 100 µF via gate 3.2 . A foreign reset is triggered via gate 1.4 . External set is generated via two diodes on the 4066. A transistor taps the output and switches the display. An LED shows the state of the relay.

The principle of the "analog" module ( Fig. 7) is based on that of the switching module. An 8-digit display and 8 optocouplers are switched via a 74193 counter module and two 4051. Via the Enableline of the 4051 responsible for the display, the respective display is only released when it is selected by the display bus. Switching is carried out via a relay function, the display (low-active) is tapped and is led to the analog module via connecting lines. The optocouplers can switch through voltages up to 100 V. The value is retained even when the display is not active. With two additional 4051s and a U6050 and U6052 transmitter and receiver unit, this function can also be expanded to 16 levels.

In summary it should be mentioned that the prog. Control with matrix selection is made as a prototype.

The control unit was housed in a 4U housing. When Remote control can use any 4-channel IR or radio system become. The matrix selection facilitates the operation of the system. By the separation of display and selection is different in production large display fields possible, individually with remote control or Control buttons can be controlled. The relay functions are can be combined as required. The main advantage is likely to be in the minor Material costs and use of standard components lie.

An RS 232 interface was deliberately omitted because there is no device can only be controlled with it.

Claims (2)

1. Programmable control unit for use in conference room technology for controlling media and electrical room functions, which is constructed in modular technology, characterized in that the programming is carried out by means of jumpers and the selection is constructed in the form of a light-emitting diode matrix, which is built up by 4 key functions can be selected and has a further eight-digit display and function of a voltage switching by means of optocouplers. ( Fig. 1) 2. Selection and display matrix according to claim 1, characterized in that it consists of 64 individual displays, an 8 × 4 matrix is framed by 24 selection pointers, and has a further eightfold display for displaying a level value ( Fig. 2).