DE8408007U1 - Display for an electronic control unit - Google Patents

Description

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Patent attorney © German utility model registration

Dipl.-Ing. Hans-Jürgen Müller ^{G 84} ° ⁸ 007.8

DipL-Chem. Dr. Gerhard Schupfner ^PA 2236 / DE-GM

Dipl.-Ing. Hane-Peter Gauger ^{LGZ Landla & G} V ^{r Zu} 9 ^AG LucHe-Grahn-Str. 36 - D 8000 Munich 80

HJM / Sa

May 15, 1984

New introduction to the description

'" Display device for an electronic control unit ^

The innovation relates to a display device for a Electronic control unit according to the preamble of claim 1.

Electronic control devices are provided with display devices so that the entered control commands can be checked and, if necessary, changed by the operators at any time. For this purpose it is important that the Type of commands to be entered for both input and can be read from the display elements.

There are various types of display devices for control devices known, but few of them are integrated Circuits in fully electronic devices, especially with a micro-computer, can be controlled directly. One The exception are the liquid crystal elements, which «increase their low energy consumption with likewise low control voltages, also in the form of relatively large-area displays Gain meaning.

Display devices for electronic control devices with liquid crystal elements according to the preamble of the protection claim 1 are already known (DE-OS 2 054 473). In doing so, fluids

Sigkristall elements are used, consisting of two closely spaced apart, with one on the inside transparent conductive electrode layer for the control provided glass panes are constructed «whose enclosed interior is with a nematic liquid filled, which has liquid crystal properties. The front and / or back of the glass plate facing the viewer is labeled with symbols which, depending on the control of the liquid crystal electrodes, are based on the type of nematic liquid crystals and on the color of the glass plate facing away from the viewer or the labeling of the glass plate facing the viewer and serving as a text field plate are visible or invisible. If the symbol has to be changed due to any circumstances the entire liquid crystal element can be replaced as a whole

The object of the innovation is to provide the display device with easily exchangeable labeling, e.g. in different languages without exchanging the respective liquid crystal elements.

The innovation is claimed in protection claim 1. Advantageous embodiments are defined in further claims,

An exemplary embodiment of the innovation is explained using a drawing.

Show it:

FIG. 1 an electronic control unit;

FIG. 2 shows a title block with lettering in German;

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FIG. 3 shows a circuit diagram of the device according to FIG. 1;

FIG. 4 shows a display scheme for querying occupancy periods;

Figure 5 shows a display scheme for the input of setpoints and

FIG. 6 shows a display scheme for a temperature query.

In the figure 1 is an operating side 1 of an electronic control device for a heater in the form of a shown with connections provided base plate plug-in module. On this operating side 1, in a recess 2, there is a display panel 3 with liquid crystal elements 8 to 29 and 50, two in two zones 4 and 5, arranged in these zones 4 and 5 are housed digital displays 6 and 7 and a keypad arranged in two rows. The first zone 4 contains the rectangular liquid crystal elements 8 to 18 and a square liquid crystal element 19. The second zone 5 is equipped with rectangular liquid crystal elements 20 to 29 and 50.

The digital display 6 has one digits, while the other digital display 7 has multiple digits.

In the recess 2 of the operating side 1 of the control device protruding keys 30 to 39 are arranged in two rows.

2 shows an interchangeable label plate 40 that fits into the recess 2 and is labeled in German. It is preferably printed on the back with various scripts and other characters, hereinafter referred to as "symbols 8a to 29a and 50a. The with the index Symbols marked "a" lie exactly above the liquid crystal elements marked with the same indexless number. the Lettering field plate 40 also has openings 30a to 39a,

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through which the keys 30 to 39, labeled with the same indexless digits, protrude, above and partly below These are, for example, in a line 47 on the label plate 40, further symbols are printed which indicate the operation of the keys 30 to 39 make it easier Figures 2 and 3 be designed to be interchangeable with one another.

The circuit diagram of Figure 3 shows the connections in the control device according to Figure 1 with a microcomputer 41 and a associated memory 42, which can optionally be integrated in the microcomputer 41. The buttons used for operation, 30 to 39 as well as any v / used, Temperature sensors (not shown) are connected to an input circuit 43 of the microcomputer 41. An output circuit 44 is used to control the individual liquid crystal elements 8 to 29 and 50 and the two digital displays 6 and 7 via separate lines. The memory 42 is with the micro-computer 41 by means of a two-sided Bus 45 connected.

The liquid crystal elements 8 to 29 and 50 are preferably of the cisr type so that they appear white or silvery without control. In contrast, they appear black when activated. The digital displays 6 and 7 are also colored or black when activated. They preferably also consist of Liquid crystal elements. The symbols 8a to 29a and 50a are also preferably black, in any case in the same color as a driven liquid crystal element 8 to 29 and 50.

If the power supply is switched off or if the buttons are not pressed 30 and 39 are all symbols 8a to 29a and 50a printed on the label plate AO and the labels for the keys 30 to 39 visible against the light background. When keys 30 to 39 are operated, the micro-computer 41 is via its

Input circuit 43 activated. By means of an order that

is programmed in the non-illustrated, non-volatile memory integrated in the micro-computer 41, selected liquid crystal elements 8 to 29 and 50, which are not those of the pressed keys 30 to 39 correspond to requested information chen, controlled by means of the output circuit 44. Through this the relevant, activated liquid crystal elements 8 to 29 and 50 appear black and the symbols above them disappear due to lack of contrast. In contrast, the digital displays 6 and / or 7 show the memory 42 via the Bus 45 information retrieved. When the key 31 labeled "ENTER" is pressed, those entered are not yet Information and commands present in the memory 42 are entered into the memory 42 by the micro-computer 41 via the bus 45. she remain there until instructed otherwise Pressing the two correction keys 32 or 33 changed or can be cleared by pressing key 38 labeled "CLEAR" for the command in question. If one of the buttons 30, 32 until 37 or 39 is pressed several times appear if applicable successively different information on the digital display gen 6 or 7 or symbols Sa to 29a and 50a of Fig. 2. This is explained in more detail with reference to the description of FIGS. 4, 5 and 6. If necessary, a single or multiple

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buttons 30 to 39 are different when pressed several times Control liquid crystal elements 8 to 29 and 50 and so completely different symbols 8a to 29a and 50a appear one after the other or make it disappear so that the same key 8 to 29 and 50 different commands or information are assigned.

The picture shown in Fig. 3, i.e. start of vacation, weekday T, is generated by pressing the button 35 labeled "Holidays". The digital display 6 then shows the «pale "1". All of the other symbols 8a to 29a and 50a are invisible through the corresponding liquid crystal elements 8, 9, 12 to 17, 19, 21 and 23 to 29 and 50 which appear in black. If the button 33 is pressed, the digital display 6 the number 2 visible for the second day.

The state shown in FIG. 4 is therefore provided for, by pressing further keys 30 to 39, the numerical values for call up further parameters of an occupancy period or use one of the buttons 31 to 33 in the "Correction" field to be changed or entered into the memory 42. The state shown in the display scheme of FIG. 4, in which only the Relevant keys and displays are provided with reference numbers, can be reached by pressing the "Bei.-Zeit" button once. designated key 36. On the digital display 6 you can see the Specification 1 for the day of the week 1, in place of the symbol 24a the Period 1 is displayed and the time "0800" on the multi-digit digital display 7 for the start indicated by the symbol 22a of period 1. FIG. 4 is thus a display scheme for querying occupancy periods.

If you are looking for the display for other days of the week, press the Button 37 accordingly again or several times. The day of the week in question is then visible on the digital display 6. on the end of the occupancy period 1 can be called up in a similar manner by pressing the button 36 once again for the occupancy time will. Then the indication "Beginning" disappears with d ^ s now black appearing liquid crystal element 22. The liquid crystal

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stall element 23, however, is no longer activated and therefore the word "end" is visible at the position above the title block 40. The digital display 7 now marks the End of the occupancy period 1.

As has been indicated in the description of FIG. 3, by pressing the key 37 labeled "week days" together with the button 36 labeled "At. Time" the corresponding Data for the various days of the week can be called up.

Also in FIG. 5, which shows a display scheme for the input of setpoint values, only the relevant reference numbers are entered. This FIG. 5 shows the state which is brought about by pressing the key 34 labeled "Setpoints" once. As a result, the symbols "Room temp.", "Setpoint", "Occupancy period ¹¹ and" End "as well as" ⁰ C "are visible above the non-actuated liquid crystal elements 8, 9, 21, 23 and 26. The in the 5, the value "18.00" for the stored temperature value indicated on the digital display 7 can now be changed by pressing the keys 32 or 33 provided for "corrections" one or more times and provided with an upward or downward character The displays first slowly and then more quickly adjusted in the digital display 7. The last number exchanged is displayed by flashing until it is changed again by entering another number or by pressing the key 31 labeled "ENTER" from the micro-computer 41 into the memory 42 of Fig. 3 and is stored there until another change is keyed in. By pressing button 34, "Setpoints" again, for example, "Beginning" appears instead of "End" When the button 34 is actuated, the symbols 8a, “room temp.”, 9a, “setpoint value” and the symbol 19a indicating the night (see FIG. 2) appear.

According to the display scheme according to FIG. 6, only the liquid crystal elements 26 and 29 have not been activated by pressing the button 39 for "temperature displays" once. Thereby are

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the overlying symbols "C" and "Aussen" as well as in the Digital display 7 indicates "4.00" as the actual value for the outside temperature visible. If the button 39, "Temp. Display" is pressed again, the symbol 28a, "Room", is displayed instead of the Symbol 29a, “outside”, (see FIG. 2) visible, the symbol 26a, “° C.” remaining visible in both cases.

The innovation makes it possible for the label with the parameters in different languages signature field plates as desired and easy to replace, attention being paid only when labeling that d ⁵ e mutually corresponding smd symbols arranged at the same location.

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Claims (7)

New protection claims 1. Display device for an electronic control device, in which liquid crystal elements for displaying symbols are arranged visibly on one side of the control device and the symbols are designed as essentially illegible lettering on a transparent writing end plate when the liquid crystals are activated,
characterized in that the Suhriftfeldplatte (40) in relation to liquid crystal elements (8-29> 50) is designed as an exchangeable cover plate for the liquid crystal elements (8-29, 50) and their symbols (8a-29a, 50a) in the same color as vnd are arranged congruently with liquid crystal elements (8-29, 50) on the writing field plate (40). 2. Display device according to claim 1, characterized in that the replaceable label plate (40) for covering several fields of individually controllable liquid crystal elements (8-29, 50) with several symbols (8a - 29a, 50a) is provided congruently with the relevant liquid crystal elements (8-29, 50). ta t »t * t ·» • · ι · ι · I ■ f 1> 1> 1 3. Display device according to claim 1 or 2, characterized in that that the activated liquid crystal elements (8-29, 50) and the symbols (8a-29a, 50a) of the replaceable writing field plate (40) are designed black. 4. Display device according to one of the preceding claims, characterized in that that the exchangeable label plate (40) with openings (30a - 39a) is provided, which are aligned with control buttons (30-39). 5. Display device according to claim 4, characterized in that that the control buttons (30-39) protrude through the openings (30a 39a) of the replaceable label plate (40) . 6. Display device according to claim 4 or 5, characterized in that that symbols (8a-29a, 50a) are combined in zones (4, 5) of the exchangeable label plate (40). 7. Display device according to one of the preceding claims, characterized in that that the exchangeable label plate (40) in a recess (2) of a display field (3) of a plug-in module can be used. t · III I I ι I I I (