EP4004445A1

EP4004445A1 - Touch indicator system and method for ovens

Info

Publication number: EP4004445A1
Application number: EP20844531.2A
Authority: EP
Inventors: Burak ENEZ; Halil BOZKURT
Original assignee: Alpplas Enduestriyel Yatirimlar AS
Current assignee: Alpplas Enduestriyel Yatirimlar AS
Priority date: 2019-07-22
Filing date: 2020-04-24
Publication date: 2022-06-01
Also published as: WO2021015691A1; EP4004445A4

Abstract

A touch indicator system which enables to control the ovens and to display the required information to the user, characterized in that, it comprises the following; a regulator circuit (1) which converts the voltage coming from the adapter to a level at which the relevant hardware can be used, a ring/buzzer (2) which enables audible warning at required level and tone and time according to the oven functions, a LED driver (3) which will enable LEDs located on the electronic card to operate and to light LEDs with different brightness, a thermocouple (4) which enables to measure the oven temperature and to transmit it to the microprocessor (5), a touch sensor (6) connection circuit which enables connection of the touch sensor, a power card connection circuit (7) which enables communication with the power card, rotational slider (9) which enables touch operation on the rotational axis, enables placing LEDs according to the position of the touch sensor in the rotational axis in the design of the electronic card and enables to show warning in the rotational axis by LED synchronised with the touch action), a touch button (10) which enables users to make controls in relation with the oven, a display (11) which enables to display images on the electronic hardware without using any screen by means of the LEDs on the electronic card, to position LEDs correctly and to display numbers and icons by means of driving thereof with a microprocessor (5), said buzzer (2), LED driver (3), thermocouple (4), rotational slider (9), touch button (10) and microprocessor (5) which enables to control the displays (11).

Description

TOUCH INDICATOR SYSTEM AND METHOD FOR OVENS

Technical Field

The invention relates to a system applied with an electronic card and embedded software which will provide the following features in the ovens; temperature, in-oven operation options (lower-upper heating, only lower heating, lower heating and fan, fan options etc.), cooking settings (semi-automatic, automatic cooking etc.), indicator settings (clock, sound level, brightness etc.), touch features on the display panel for indicators (temperature ^“C, active modes and functions, icons).

State of the Art

The current oven controllers provide the touch feature on the oven display panel by means of the hardware design and embedded software. Although applications have been made in the world by new generation sensors, there is no application example with novel feature which corresponds to the mechanical rotary button.

The indicators (7-segment indicator etc.) used in the electronic cards in the prior art, mostly cause height difference between the electronic card and usage area (for example panel surface). Namely, the button configuration in touch feature is located on the lower portion and the display is located on the upper portion (zero distance to the panel). There are two options in order to tolerate the distance between the touch button configuration and the panel. The first option is to use spring (M4) etc. conductors with a height as much as the distance between them, the second option is to change the precision setting (for example threshold value) for the touch feature. Both options have disadvantages. The string of the spring (M4) etc. elements (placing thereof on the card or combining thereof with the help of soldering) is an operation which is open to mistake and time consuming. Changing the precision setting (increasing/decreasing the threshold value) which is the other way, there is a risk for the buttons that they can be influenced from each other. Namely, when touching action is performed on any button, another button may act as it was touched although it was not touched. Another example is that, before touching action is carried out, when the finger approaches for contact, the button or buttons may act as if the touching action is realized. In order to eliminate this condition, precise setting is very difficult. Also, since the determined threshold values are exceeded in required tests to be made in household appliances, there will be a problem (locking of the buttons under high frequency, not carrying out the functions).

In the control cards of the current ovens, various types of displays (for example M2 can be considered) are used. Moreover, in the prior art, the temperature setting is performed by means of a mechanical switch/key. When the oven reaches to the adjusted temperature, the switch is closed and cuts the energy of the system. The temperature value cannot be controlled precisely in these applications.

As an example, to the state of the art, the application No 2017/09854 can be given. The summary of this invention is as follows;“The invention relates to a cooking oven device which comprises an electrical heating device, a mechanical temperature controller for switching the heater assembly on and off and for activating the control element and one or more operation types, an electronic clock for adjusting the required heating duration, wherein the clock has a display panel for electronic clock indicator and a control element for controlling the display panel”.

When we consider the document No 2017/09854; it is seen that the features as the rotational slider, capacitive touch transparent conductive foil (new generation sensor), indicator formed on the electronic card with LEDs are not found. Therefore, present application relates to an oven panel where the mechanical controls are realized and in addition to this a configuration in which touch features facilitating the oven control of the user is developed, are not mentioned.

As a result, due to the abovementioned disadvantages and the insufficiency of the current solutions regarding the subject matter, a development is required to be made in the relevant technical field.

Aim of the Invention

The invention aims to provide a structure having different technical features which brings a new development in this field different from the embodiments used in the state of the art. The main aim of the invention; is to provide usage of transparent conductive foil (new generation sensor) with capacitive touch feature. Therefore, additional equipment such as the conductive spring (M4) etc. requirement will be eliminated. At the same time, mechanical rotary button (M1 ) will not be required to be used on the front panel of the oven together with the rotational slider feature. Although the mechanical button (M1 ) will not be used with the invention, touch feature will be provided on the rotary axis for not creating difficulty for the user and not changing the conventional use.

An aim of the invention is to provide the image (e.g. numbers, temperature and time indicator etc.) in the developed electronic card on the card by means of the hardware design. LEDs will be controlled by means of LED driver circuit and MCU (micro controller unit) and thus using a screen will not be necessary. LED design which will form the display image and the processor which will control the oven will be on the same card. This provides an advantage in terms of both the area occupied and cost. At the same time, since microprocessor and LED circuit is located in a close manner, a better performance (e.g. less exposure to parasites, faster communication etc.) is provided.

The user can be able to adjust the temperature value at which the oven will perform cooking in a quick and easy manner by means of the inventive system. When this adjustment is made, the touch feature will be enabled by the rotational slider and touch buttons, at the same time when the user performs this action, he/she will understand whether the touch operation is successful or not by means of the LEDS which will be switched on or off in the areas touched. Increasing and decreasing the clock and/or duration options contained in the menus similar to the temperature setting, will be enabled by means of the touch feature based on the rotational slider, and the transition between the menus where these adjustment are made will be enabled by means of the touch buttons. The user will be informed by means of the activated/deactivated LEDs which are synchronised with the touch process. Touch feature which is based on the rotational slider and acts as a button will be enabled by means of a new generation sensor (transparent conductive foil) which will operate integrated with the hardware.

There are areas which operate in the direction of capacitive button logic at determined locations of the sensor which is specifically selected according to the operational logic of the control card. Therefore, the transition between the programs, menus and modes can be enabled with a light touch by the user. The user can be able to display settings based on the oven functions such as hour, duration (with the hour and minute or minute and second options), temperature value, activated/deactivated functions etc. or the current condition by means of the indicator circuit located on the electronic card. An image similar to the display screens in the electronic hardware will be enabled by means of a special LED design. Therefore, the same image and visuality will be enabled by means of the developed circuit design and software instead of driving this display by software by using a ready display.

As mentioned above, rotational slider feature will be used by means of the designed electronic hardware, developed embedded software and new generation touch sensor and thus this will eliminate the requirement of the conventional rotary mechanical button (M1 ). Designed electronic card will be qualified for controlling auxiliary equipment warning and/or indicators LEDs, resistances within the oven, fan etc. Thus, both the touch panel will have a trendy look and will allow ease of use. This novelty will provide great ease for both the final user and the production processes (additional hardware, typesetting etc. requirements will be eliminated).

In the system of the invention, a 32-bit ARM cortex MO processor is used. Therefore, a higher process power is enabled.

In order to fulfil the above described aims, the invention is a touch indicator system which enables to control the ovens and to display the required information to the user, characterized in that, it comprises the following;

• A regulator circuit which converts the voltage coming from the adapter to a level at which the relevant hardware can be used,

• A ring/buzzer which enables audible warning at required level and tone and time according to the oven functions,

• A LED driver which will enable LEDs located on the electronic card to operate and to light LEDs with different brightness,

• A thermocouple which enables to measure the oven temperature and to transmit it to the microprocessor,

• A touch sensor connection circuit which enables connection of the touch sensor,

• A power card connection circuit which enables communication with the power card,

• Rotational slider which enables touch operation on the rotational axis, enables placing LEDs according to the position of the touch sensor in the rotational axis in the design of the electronic card and enables to show warning in the rotational axis by LED synchronised with the touch action,

• A touch button which enables users to make controls in relation with the oven, • An indicator which enables to display images on the electronic hardware without using any screen, to position LEDs correctly and to display numbers and icons by means of deriving thereof with a microprocessor,

• Said buzzer, a LED driver, a thermocouple rotational slider, a touch button and a microprocessor which enables controlling the displays.

The structural and characteristic features of the present invention will be understood clearly by the following drawings and the detailed description made with reference to these drawings and therefore the evaluation shall be made by taking these figures and the detailed description into consideration.

Figures Clarifying the Invention

Figure 1 , is the view of the oven indicator of the current art.

Figure 2, is the view of the oven display of the current art.

Figure 3, is the general view of the inventive system.

Figure 4, is the front view of the inventive display panel.

Figure 5, is the front view of the inventive oven.

Figure 6, is the view of the design diagram.

Figure 7 is an illustrative view of the material designs used in the inventive oven controller, new generation sensor and the whole structure.

The figures must be scaled and the details which are not necessary for understanding the present invention may be neglected. Moreover, the elements that are at least substantially identical or have at least substantially identical functions are shown by the same number.

Description of the Part References

1 . Regulator circuit

1 .1 DC-DC regulator circuit

1 .2 LDO regulator circuit

2. Buzzer

3. LED driver

4. Thermocouple

5. Microprocessor

6. Touch sensor connection circuit 7. Power card connection circuit

8. Programming socket

9. Rotational slider

10. Touch button

1 1. Indicator

12. Serial communication socket

13. Actuator control circuit

14. Zero crossing detection circuit

15. NTC circuit

20. Foil

21. Translucent plastic part

22. Panel

23. Transparent conductive foil

24. LED housing

25. Electronic card

M1. Mechanical rotary button

M2. Indicator and touch control region

M3. 7 segments 1 digit indicator

M4. Conductive spring

Detailed Description of the Invention

In this detailed description, the preferred embodiments of the invention is described only for clarifying the subject matter in a manner such that no limiting effect is created.

In the system subject to invention, the supply voltage of 12 - 30V coming from the adapter is converted to the required voltage values (5V and 3.3V) for the operation of the regulator circuit (1 ) and other circuit and/or components included in the developed electronic circuit. The invention mainly consists of; a new generation touch sensor (they are sensors which are in general transparent sensors in terms of appearance, have electrically conductive and flexible structure. These sensors with flexible structure are also called as transparent conductive foil. There are many different types which are both functional (multi-touch, touch, proximity perception etc.) and structural (layers, temperature resistance etc.). Although the area to which it is coated and connected does not have touch feature, it gives touch feature by means of communicating with the hardware and software.) Electronic hardware and embedded software and it is designed in a manner such that the user can use the oven functions easily. In addition to the ease of use, the electronic hardware and the embedded software are developed such that the new generation sensor operates ideally (optimal adjustment of the touch sensitivity, immediate response of the user to the touch action without any delay etc.). The user can be able to control the functions of the oven by means of 4 touch buttons (10) and 2 rotational sliders (9).

The microprocessor (5) controls the LEDs which are required to be activated or deactivated according to the oven functions by communicating with the LED driver (3). The user can be able to increase and decrease brightness of the LEDs at different levels by means of the microprocessor (5) software. When cooking duration expired, when the cooking process reached the ending time or when the time set for the alarm used independent from the oven functions expires, the buzzer (2) again gives an audible warning with the command coming from the microprocessor (5). Because the buzzer (3) is driven by PWM source by means of a microprocessor (5), it is possible for the user to increase and decrease the audible warning at different levels. Electronic hardware power card connection circuit (7) is designed such that it communicates with the power card. Therefore, the main functions of the oven can be controlled by means of the designed card. Temperature reading process is performed by means of K type thermocouple (4) for temperature settings in the oven (increasing, decreasing the temperature, reaching the set temperature). K type thermocouple (4) circuit communicates with the microprocessor (5) by SPI or in an analogous manner.

The first touch button (10): In case the user touches during a long time (it can be considered such as pressing on a button), the lamp within the oven is activated or deactivated. Therefore, the user can control the interior lamp of the oven in a desired manner. The interior lamp of the conventional ovens are turned on or off automatically. The user will eliminate unnecessary energy consumption with the turn on-off option. In case the user activates and deactivates the lamp in the oven, the relevant LED located on indicator of the front panel indicates the present condition of the lamp in the oven (“If the lamp in the oven is turned on, the relevant LED thus the icon is lit.). Each touch of the user enables switching between the menus in a forward direction (the next menu). The user can activate and change the functions inside the oven (options such as bottom heating, upper heating, bottom and upper heating together with active fan setting etc.) which are displayed in the first indicator (1 1 ) in a desired manner by means of using the first touch button (10).

The second touch button (10): OFF mode is activated when pressed. OFF mode is used for safety. It is the mode in which the oven functions are reset. Each touch of the user enables transition between menus (programs) in a backward manner (the previous menu/program). It controls the same features with the controlled options in the first touch button (10).

The third touch button (10): It provides transition between the menus where the settings for the user are performed with each touch. The first touch and the first menu (second indicator (1 1 )) are used for the child lock. When this menu (the second display (1 1 )) is reached, the second rotational slider (9) which rotates full is rotated clockwise by means of touching, the child lock is activated. In case the touch action based on the rotational motion in the same menu (the second indicator (1 1 )) is applied counterclockwise, the child lock is deactivated. When the child lock is activated, touch functions (except pressing the third touch button (10)) do not perform detection. The user can reach the menus (the second indicator (1 1 )) in which he/she can adjust the time of the day, buzzer sound and indicator (1 1 ) (icon and number indicators provided with LEDs) brightness level by touching this button. In the second indicator (1 1 ), the menu where the user is in is shown with the activation of the LED of the relevant icon. The options to be adjusted with the second rotational slider (9) are increased or decreased. The user can display set values of values to be set such as clock, duration, buzzer sound and image, brightness levels by means of the 4-digit indicator (the second indicator (1 1 )). In case the user touches the third touch button (10) during a long time (it can be considered such as pressing on a button), ECO mode is activated. ECO mode; means that the resistances are turned off and the remaining cooking time with the current heat of the oven when one 15th cooking time remains (for example, cooking time is set as 1 hour, ECO mode is active in the last 4 minutes). Thus, energy is saved for the user.

The fourth touch button (10): It provides transition between the menus (they are displayed by the second indicator (1 1 ) where the adjustments in terms of cooking are made. Transition is provided between menus used for adjusting the alarm feature with this button independent from the semi-automatic (it is the mode in which only the duration of cooking or ending time of the cooking process are adjusted), automatic (cooking the food during the set time, and the setting the duration and time together) cooking functions of the oven.

The first rotational slider (9): When it is rotated by a clockwise touch motion, it increases the temperature, with the counterclockwise movement, it decreases the temperature. LEDs are activated and deactivated according to the movement made with the LEDs following the finger movement while these processes are carried out. It is possible to add different animations to these LEDs by the microprocessor (5).

The second rotational slider (9): All LEDs located on the second rotational slider (9) in the relevant menus with the cooking or user options flash, this is for describing the user that the adjustment is performed by using the rotational slider (9). Same as the first rotational slider (9), there are activated/deactivated LEDs that will follow the finger movement in the second rotational slider (9). (For example, when increasing process is performed, LEDs which are in the position to follow the finger simultaneously with the finger movement are activated) When the alarm sounds and/or the cooking process is completed, LEDs on the second rotational slider (9) flash together with the audible alarm. Therefore, the user is also warned visually.

There are totally 40 LEDs on the second rotational slider (9). After setting is performed for cooking, when the cooking process starts, the adjusted period in the second rotational slider (9) is divided into 40. Therefore, the adjusted time corresponds to each LED. When the adjustment is made and set, all LEDs are activated. When each 1/40 time passes, 1 LED is deactivated. When the duration is expired or when the set time is reached, all LEDs are deactivated and all LEDs flash simultaneously with the alarm in order to show that the cooking is completed. Therefore, the user can instantly see the progress of the cooking process visually.

The first indicator (1 1 ): It has icons which will show totally 8 functional modes and one OFF mode. The temperature value is shown to the user by means of activating the relevant LEDs in 3-digit and 7-segment in the first indicator (1 1 ). There are - and + icons (the icons become visible by means of the LEDs) at the start and end points of the first rotational axis (9). Temperature increase (clockwise rotary touch motion), decrease (counterclockwise rotary touch movement) process is performed by using the first rotational slider (9). The user can see the mode to which the user performs adjustment, the present condition of the oven (whether the resistances are active, interior of the oven has reached the required temperature, the present condition of the interior lamp of the oven) by means of LEDs located on the right, left, above and below of the first indicator (1 1 ).

The second indicator (1 1 ): It is designed in a manner such that it shows the time and duration 4-digit and 7-segment. The time display can be performed in hour-minute or minute- second form. There is one icon for each of these displays (for example for the display in the form of hour-minute, the LED of “h” icon is lit, for the display in the form of minute-second display, the LED of “m” icon is lit). Therefore, the user can interpret the numbers in the first indicator (1 1 ) correctly. The user can get information about the current menu by means of the icons representing the menus (LEDs which belong to these icons are being activated/deactivated) .

The corresponding icon flashes until the adjustment process for each menu/program is completed. If the user does not perform any operation during 3s in any menu or program, the present value in this menu is set. Energy is supplied to the oven when the temperature value is different than 0 and a program is selected.

The display design on the indicators (1 1 ) is performed on the current electronic card. That is to say, a ready screen is not integrated on the card; the required design and software for providing the same image with that ready screen are enabled on the control card of the oven. Just as there are LEDs, connections etc. within a display, the requirements are met in this circuit to be designed on the oven card.

The functions of all above described buttons (first, second, third, fourth touch button (10), first, second rotational sliders (9)) and the indicators (1 1 ) (display circuit specially designed according to the digits and icons) are provided through the specially designed embedded software and microprocessor (5).

The system recalibrates the touch perception future itself and provides proper operation of the touch feature according to the environmental conditions (adverse conditions such as water or dirt on the touch perception region) by means of the developed software. Namely, variable conditions or situations do not affect the quality of the touch feature. (The touch feature is affected negatively from the external factors such as liquid, dust etc. The touch sensitivity will be negatively influenced when these external factors com on the touch pad. As its simplest, it can be interpreted as perceiving less than required or more. This reduces the economic life and quality. The sensitivity of the button which changes under adverse conditions will be detected and immediately calibrated by means of the embedded software, thus there will be no shortening in touch quality and/or product life.)

The front panel of the oven is formed by means of combining the foil (20), translucent conductive plastic part (21 ), panel (22), transparent conductive folio (23) (new generation touch sensor), LED housing (24) (housing) and electronic card (25). The indicator image is obtained on the electronic card instead of using display with LED design as described above. Controlling the LEDs is not sufficient for this process. The operation of LEDs shall not affect each other for an ideal display. Within this context, a special LED housing (24) is designed in a manner such that it surrounds the LEDs. It is possible to see the symbols, shapes and the icons such that they are compatible with the modes on the front panel together with the foil (20) design to be made specifically for the LEDs that will represent the icons on the indicator.

The process steps carried out with the inventive system is as follows;

• Converting the voltage coming from the adapter by means of the power input to the levels at which the relevant hardware can operate by means of the regulator circuit (1 ), (3A, 5V supply is provided. 5V is necessary for feeding the LED driver (3). 5V is converted to 3.3V by means of LDO (Low-dropout regulator). 3.3V supply is required for the microprocessor (5) and the thermocouple (4).)

• Transferring the voltage obtained from the regulator circuit (1 ) to the microprocessor (5) and starting the operation of the microprocessor (5),

• Loading the developed embedded software to the microprocessor (5) by the programming socket (8), (At the same time this socket software can be used in the trials to be made during the development phase and debugging steps.)

• Transferring the voltage obtained from the regulator circuit (1 ) to the microprocessor (3) and LED driver’s (3) driving the LEDs according to the commands coming from the microprocessor (5), ((such as turn on, off, brightness setting etc.). LED driver controls the relevant LEDs according to the information coming from the microprocessor (which operation is performed by the user, which information will be given to the user for example; illumination of LEDs corresponding to the fan icon while the fan adjustment is made). It is fed with 5V. It has 144 LED driving capacity. It is in the form of 12x12 matrix (consisting 12 lines, 12 columns). It has 256 duty cycles. 255 different brightness values can be obtained namely from 0 (minimum) to 255 (maximum). It communicates with the microprocessor by means of I2C communication. • Connecting thermocouple (4) on the electronic card and transferring the temperature of the oven to the microprocessor (5) by measuring thereof with thermocouple (4), (K type thermocouple reads the temperature is a wide range and in a short time and sends the temperature value that it has read to the microprocessor by SPI communication or as an analogue. It is fed by 3.3V)

• Giving audible warning through the buzzer (2) according to the commands sent by the microprocessor (5) for warning the user, (for example for an alarm when the cooking duration is expired) (the audible warning of each process is different. Different impulses/warnings are given when the cooking durations expire for example in semi-automatic mode and automatic mode. Protection (voltage limitation) is provided with a 15V zener diode contained in its circuit. The buzzer (2) in driven with the help of the microprocessor (5) by PMW. Therefore, it will be possible for the user to adjust the sound level. At the same time, the hardware design is appropriate to both TH (through hole) and SMD (surface mount device) component.)

• Detecting the performance of the touch action of the user by the touch button (10) and the rotational slider (9) and displaying the LEDs through the indicator (1 1 ) by means of controlling with the microprocessor (5) (The touch button (10) and the rotational slider (9) are operated based on the capacitive touch principle. Preferably there are 4 touch buttons (9) and 2 rotational slider (9). It is possible to change the settings related to the touch feature (the distance from which the detection will be made, threshold value for touch sensitivity etc.) by means of the microprocessor (5) (for the most ideal usage). The capacitive touch sensor communicates with the designed electronic hardware and embedded software by means of the communication circuit. The microprocessor (5) activates/deactivates the LEDS and/or LEDs in the right position according to the information coming from the sensor. Therefore, the user can see that the LEDs where he/she instantly touched are activated.

Claims

1. A touch indicator system which enables to control the ovens and to display the required information to the user, characterized in that, it comprises the following;

• A regulator circuit (1 ) which converts the voltage coming from the adapter to a level at which the relevant hardware can be used,

• A ring/buzzer (2) which enables audible warning at required level and tone and time according to the oven functions,

• A LED driver (3) which will enable LEDs located on the electronic card to operate and to light LEDs with different brightness,

• A thermocouple (4) which enables to measure the oven temperature and to transmit it to the microprocessor (5),

• A touch sensor (6) connection circuit which enables connection of the touch sensor,

• A power card connection circuit (7) which enables communication with the power card,

• Rotational slider (9) which enables touch operation on the rotational axis, enables placing LEDs according to the position of the touch sensor in the rotational axis in the design of the electronic card and enables to show warning in the rotational axis by LED synchronised with the touch action,

• A touch button (10) which enables users to make controls in relation with the oven,

• An indicator (1 1 ) which enables to display images on the electronic hardware without using any screen by means of the LEDs on the electronic card, to position LEDs correctly and to display numbers and icons by means of driving thereof with a microprocessor (5),

• Said buzzer (2), LED driver (3), thermocouple (4), rotational slider (9), touch button (10) and microprocessor (5) which enables to control the displays (1 1 ).

2. The touch indicator system according to claim 1 , characterized in that; it comprises 4 touch buttons (10) and 2 rotational sliders (9).

3. The touch indicator system according to claim 1 , characterized in that; it comprises the microprocessor (5) which enables to perform different audible warning of each process by means of the buzzer (2), • enables to activate/deactivate LED and/or LEDs at the right location according to the information coming from the touch sensor and allows the user to see the activation of LED or LEDs on the place that the user instantly touches.

4. The touch indicator system according to claim 1 , characterized in that; it comprises touch buttons (10)

• which enables to activate or deactivate the lamp in the oven when the user touches for a long time,

• enables to open the safety mode when pressed and to reset the oven functions,

• enables transition between the menus where the adjustments directed to the user are performed in each touch,

• enables transition between menus where the adjustments in terms of cooking of the oven are performed.

5. The touch indicator system according to claim 1 , characterized in that; it comprises the rotational slider (9)

• which increase the temperature when it is rotated by clockwise touch movement, decreases the temperature when it is rotated by counter clockwise touch movement, follows the finger movement while these processes are performed, enables to activate or deactivate the LEDs according to the movement made with LEDs,

• enables to activate or deactivate all LEDs located on the menus in relation with cooking or user options.

6. The touch indicator system according to claim 1 , characterized in that; it comprises a new generation touch sensor which are transparent sensors in terms of appearance, have electrically conductive and flexible structure.

7. A touch indicator method which enables to control the ovens and to display the required information to the user, characterized in that, it comprises the following process steps;

• Converting the voltage coming from the adapter by means of the power input to the levels at which the relevant hardware can operate by means of the regulator circuit (1 ),

• Transferring the voltage obtained from the regulator circuit (1 ) to the microprocessor (5) and starting the operation of the microprocessor (5), • Loading the developed embedded software to the microprocessor (5) by the programming socket (8),

• Transferring the voltage obtained from the regulator circuit (1 ) to the microprocessor (3) and LED driver’s (3) driving the LEDs according to the commands coming from the microprocessor (5),

• Connecting thermocouple (4) on the electronic card and transferring the temperature of the oven to the microprocessor (5) by measuring thereof with thermocouple (4),

• Giving audible warning through the buzzer (2) according to the commands sent by the microprocessor (5) for warning the user,

• Detecting the performance of the touch action of the user by the touch button (10) and the rotational slider (9) and displaying the LEDs through the display (1 1 ) by means of controlling by the microprocessor (5).