Grid plate

A method for recording a control information (42, 46) with an input device (6), for operating a multimedia device (4) depending on the position of a user's finger on a pressure plate (24) comprising the pressure plate (24) which comprises a bottom side (50) and a top side (48) opposite the bottom side (50), on which the user can move their finger, a regular grid (15) made of tactile elements (26) which can be haptically sensed by the user's finger and which are formed on the top side (48) of the pressure plate (24), wherein the regular grid (15) are arranged to form a same grid as a grid (15) of a menu (14) on a screen (8) and each of the tactile elements (26) on the remote control (6) is assigned a menu item (16) of the menu (14), a capacitive switch membrane (62) embedding with sensor plates (70) arranged on the bottom side (50) of the pressure plate (24) which is set up to transmit a button selection signal (42) to the multimedia device (4) depending on the position of the finger on the top side (48), wherein the sensor plates are arranged to form the same grid as the regular grid (15) of the tactile elements (26) on the top side (48) of the pressure plate (24), and a switching plate (80) installed on the bottom side (50) of the pressure plate (24), wherein an evaluation electrode (72) corresponding to each of the sensor plates (70) is assigned to the each capacitor plate (70);

• from every evaluation electrode (72), an evaluation line (74) corresponding to the evaluation electrode (72) on the switch membrane (62) leads to an interface (76) which can then be connected to an electronic evaluation system (106) in the form of a printed circuit board (78);
• a feed-through opening (94) on an upper left corner of the switching plate (80) is executed on the switching plate (80), through which the interface (76) of the switch membrane (62) can be led;
• the printed circuit board (78) is equipped with a connector (110) to which the interface (76) of the switch membrane (62) can be connected;
• the connector (110) is used to transmit signals on the evaluation line (74) of the switch membrane (62) to the evaluation device (106), which controls a signal generation device (108);
• a first pressure take-up element (84) for the pressure plate (24) and second pressure take-up elements (86) for remaining buttons (30, 32, 36, 38, 40) are disposed on a top side of the switching plate (80);
• and
• contact domes (88) are arranged on a bottom side of the switching plate (80) opposite the pressure take-up elements (84, 86), which are configured to be pressed down by the first and second pressure take-up elements (84, 86) to establish an electrical contact on a printed circuit board (78), and the method comprising:
• detecting the position of the user's finger on the pressure plate (24),
• transmitting the button selection signal (42) depending on the recorded position and transmitting the button confirmation signal (46) if a specified requirement is fulfilled wherein the button selection signal (42) in combination with the button confirmation signal (46) is the control information (42, 46);
• seven contact elements (100) each comprising an outer ring (102) and an inner ring (104) each are arranged on a top side of the printed circuit board (78) at the same position as the contact domes (88) on the bottom side of the switching plate (80);
• and
• when pressed by the user via pressure take-up elements (84), the contact domes (88) short circuit the outer ring (102) with the inner ring (104) causing closure of a circuit on the printed circuit board (78).

A control device (106, 108) with a processing system, the control device (106, 108) operable to operate a multimedia device (4) depending on the position of a user's finger on a pressure plate (24) comprising the pressure plate (24) which comprises a bottom side (50) and a top side (48) opposite the bottom side (50), on which the user can move their finger, a regular grid (15) made of tactile elements (26) which can be haptically sensed by the user's finger and which are formed on the top side (48) of the pressure plate (24), wherein the regular grid (15) are arranged to form a same grid as a grid (15) of a menu (14) on a screen (8) and each of the tactile elements (26) on the remote control (6) is assigned a menu item (16) of the menu (14), a capacitive switch membrane (62) embedding with sensor plates (70) arranged on the bottom side (50) of the pressure plate (24) which is set up to transmit a button selection signal (42) to the multimedia device (4) depending on the position of the finger on the top side (48), wherein the sensor plates are arranged to form the same grid as the regular grid (15) of the tactile elements (26) on the top side (48) of the pressure plate (24), and a switching plate (80) installed on the bottom side (50) of the pressure plate (24), wherein

• an evaluation electrode (72) corresponding to each of the sensor plates (70) is assigned to the each capacitor plate (70);
• from every evaluation electrode (72), an evaluation line (74) corresponding to the evaluation electrode (72) on the switch membrane (62) leads to an interface (76) which can then be connected to an electronic evaluation system (106) in the form of a printed circuit board (78);
• a feed-through opening (94) on an upper left corner of the switching plate (80) is executed on the switching plate (80), through which the interface (76) of the switch membrane (62) can be led;
• the printed circuit board (78) is equipped with a connector (110) to which the interface (76) of the switch membrane (62) can be connected;
• the connector (110) is used to transmit signals on the evaluation line (74) of the switch membrane (62) to the evaluation device (106), which controls a signal generation device (108);
• a first pressure take-up element (84) for the pressure plate (24) and second pressure take-up elements (86) for remaining buttons (30, 32, 36, 38, 40) are disposed on a top side of the switching plate (80);
• and
• contact domes (88) are arranged on a bottom side of the switching plate (80) opposite the pressure take-up elements (84, 86), which are configured to be pressed down by the first and second pressure take-up elements (84, 86) to establish an electrical contact on a printed circuit board (78), the control device being configured to:
• detect a position of the user's finger on a pressure plate (24),
• transmit a button selection signal (42) depending on a recorded position,
• transmit a button confirmation signal (46) if a specified requirement is fulfilled wherein the button selection signal (42) in combination with the button confirmation signal (46) is a control information (42, 46),
• seven contact elements (100) each comprising an outer ring (102) and an inner ring (104) each are arranged on a top side of the printed circuit board (78) at the same position as the contact domes (88) on the bottom side of the switching plate (80), and
• when pressed by the user via pressure take-up elements (84), the contact domes (88) short circuit the outer ring (102) with the inner ring (104) causing closure of a circuit on the printed circuit board (78).