Abstract: A pixel having an organic light emitting diode (OLED) and method for fabricating the pixel is provided. A planarization dielectric layer is provided between a thin-film transistor (TFT) based backplane and OLED layers. A through via between the TFT backplane and the OLED layers forms a sidewall angle of less than 90 degrees to the TFT backplane. The via area and edges of an OLED bottom electrode pattern may be covered with a dielectric cap.

Abstract: A photo-capacitance sensor includes an input surface and one or more light sources arranged to illuminate a portion of the input surface. The photo-capacitance sensor also includes an array of photo-capacitors arranged to receive light from the one or more light sources which is reflected from an object in contact with, or proximate to, the illuminated portion of the input surface. The array of photo-capacitors is configured for detecting a reflective pattern of the object.

Abstract: A pixel having an organic light emitting diode (OLED) and method for fabricating the pixel is provided. A planarization dielectric layer is provided between a thin-film transistor (TFT) based backplane and OLED layers. A through via between the TFT backplane and the OLED layers forms a sidewall angle of less than 90 degrees to the TFT backplane. The via area and edges of an OLED bottom electrode pattern may be covered with a dielectric cap.

Abstract: An apparatus (2, 22) is described which includes a touch panel (1, 21). The touch panel (1, 21) includes a layer of piezoelectric material (4) disposed between a number of sensing electrodes (5, 23, 24) and at least one counter electrode (6). The apparatus (2, 22) also includes a touch controller (3) connected to the touch panel (1, 21). The touch controller (3) is configured to determine, in response to receiving piezoelectric signals (7) from one or more of the sensing electrodes (5, 23, 24), a location (9) and an applied force (10) corresponding to a user interaction (11) with the touch panel (1, 21). The touch controller (3) is configured to determine a capacitance value (20) of one or more of the sensing electrodes (5). The touch controller is configured to operate in a force-based mode, a capacitance-based mode or a mixed force-capacitance mode depending on the type of input received.

Abstract: An apparatus (73) for processing signals from a touch panel (10) is described. The touch panel (10) includes a layer of piezoelectric material (16) disposed between a number of sensing electrodes (14, 20) and at least one common electrode (15). The apparatus (73) includes a capacitive touch controller (69) for connection to the sensing electrodes (14, 20). The apparatus (73) also includes a switch network (74) including a number of inputs for connection to some or all of the sensing electrodes (14, 20), and an output connected to system ground or a common mode voltage (VCM). The apparatus (73) also includes a second circuit (24, 44) for connection to the at least one common electrode (15) and configured to generate, based on signals received from the at least one common electrode, a second pressure signal (30) indicative of a total pressure applied to the touch panel (10).

Abstract: An apparatus is described which it a flexible touch panel (21). The flexible touch panel (21) includes a layer of piezoelectric material (9) arranged between a number of first electrodes (7, 8) and at least one second electrode (8,14). The apparatus also includes a device (3) connected to the first electrodes (7, 8) and configured to determine one or more radii of curvature (R1, R2) of the flexible touch panel (21) based on signals received from one or more of the first electrodes (7, 8).

Abstract: A force-sensing touch panel (31) is described which includes a layer structure stacked in a thickness direction between first and second surfaces. The layer structure includes from first surface to second surface, a number of first electrodes (7) and a number of second electrodes (8), a layer of piezoelectric material (9), and a number of third electrodes (30). The first and second electrodes (7, 8) are configured to define a coordinate system for sensing a location of a force applied to the touch panel in a plane perpendicular to the thickness direction. The third electrodes (30) are configured such that signals received from the first, second and third electrodes (7, 8, 30) enable determining unique locations corresponding to two or more forces applied to the touch panel (31) concurrently.

Abstract: An apparatus (73) for processing signals from a touch panel (10) is described. The touch panel (10) includes a layer of piezoelectric material (16) disposed between a number of sensing electrodes (14, 20) and at least one common electrode (15). The apparatus (73) includes a capacitive touch controller (69) for connection to the sensing electrodes (14, 20). The apparatus (73) also includes a switch network (74) including a number of inputs for connection to some or all of the sensing electrodes (14, 20), and an output connected to system ground or a common mode voltage (VCM). The apparatus (73) also includes a second circuit (24, 44) for connection to the at least one common electrode (15) and configured to generate, based on signals received from the at least one common electrode, a second pressure signal (30) indicative of a total pressure applied to the touch panel (10).

Abstract: A device (1) includes a body (2) and a touch panel (3) supported by, integrated with, or underlying the body (2). The touch panel (3) includes a layer of piezoelectric material (5) disposed between a plurality of first electrodes (6) and at least one second electrode (7). The device (1) also includes at least one second piezoelectric input region (8) supported by, integrated with, or underlying a portion of the body (2) which does not correspond to the touch panel (3). The device (1) is configured to receive user input using the touch panel (3) and/or at least one piezoelectric input region (8).

Abstract: A touch sensor (1) for combined capacitive touch and force sensing is described. The touch sensor (1) includes number plurality of first electrodes (4) and a number of second electrodes (5). The second electrodes (5) are insulated from the first electrodes (4). The first and second electrodes (4, 5) form a grid for capacitive touch sensing. The touch sensor (1) also includes a transparent cover (6). The touch sensor (1) also includes a transparent piezoelectric film (3) arranged between the transparent cover (6) and the first and second electrodes (4, 5). The touch sensor (1) also includes a patterned counter electrode (8) disposed between the transparent piezoelectric film (3) and the transparent cover (6). The patterned counter electrode (8) is a conductive grid formed from the union of plurality of counter electrode line elements (9). A pitch of the counter electrode line elements (9) is larger than a pitch of the first electrodes (4) and/or second electrodes (5).

Abstract: A pixel having an organic light emitting diode (OLED) and method for fabricating the pixel is provided. A planarization dielectric layer is provided between a thin-film transistor (TFT) based backplane and OLED layers. A through via between the TFT backplane and the OLED layers forms a sidewall angle of less than 90 degrees to the TFT backplane. The via area and edges of an OLED bottom electrode pattern may be covered with a dielectric cap.

Abstract: A method and system for programming, calibrating and driving a light emitting device display, and for operating a display at a constant luminance even as some of the pixels in the display are degraded over time. The system may include extracting a time dependent parameter of a pixel for calibration. Each pixel in the display is configured to emit light when a voltage is supplied to the pixel's driving circuit, which causes a current to flow through a light emitting element. Degraded pixels are compensated by supplying their respective driving circuits with greater voltages. The display data is scaled by a compression factor less than one to reserve some voltage levels for compensating degraded pixels. As pixels become more degraded, and require additional compensation, the compression factor is decreased to reserve additional voltage levels for use in compensation.

Abstract: An apparatus for processing signals from a touch panel. The touch panel includes a layer of piezoelectric material disposed between a number of sensing electrodes and one or more common electrodes. The apparatus includes a capacitive touch controller for connection to the sensing electrodes and a switch network including inputs for connection to the sensing electrodes and an output connected to system ground or a common mode voltage. The apparatus includes a circuit for connection to the common electrodes and to generate, for each common electrode, a corresponding pressure signal indicative of a pressure applied to the touch panel proximate to that common electrode. The apparatus includes a controller to control the switch network to couple any connected sensing electrodes to system ground or the common mode voltage during a pressure measurement period, and to sample the one or more second pressure signals during the pressure measurement period.

Abstract: An apparatus (2, 22) is described which includes a touch panel (1, 21). The touch panel (1, 21) includes a layer of piezoelectric material (4) disposed between a number of sensing electrodes (5, 23, 24) and at least one counter electrode (6). The apparatus (2, 22) also includes a touch controller (3) connected to the touch panel (1, 21). The touch controller (3) is configured to determine, in response to receiving piezoelectric signals (7) from one or more of the sensing electrodes (5, 23, 24), a location (9) and an applied force (10) corresponding to a user interaction (11) with the touch panel (1, 21). The touch controller (3) is configured to determine a capacitance value (20) of one or more of the sensing electrodes (5). The touch controller is configured to operate in a force-based mode, a capacitance-based mode or a mixed force-capacitance mode depending on the type of input received.

Abstract: A pixel having an organic light emitting diode (OLED) and method for fabricating the pixel is provided. A planarization dielectric layer is provided between a thin-film transistor (TFT) based backplane and OLED layers. A through via between the TFT backplane and the OLED layers forms a sidewall angle of less than 90 degrees to the TFT backplane. The via area and edges of an OLED bottom electrode pattern may be covered with a dielectric cap.

Abstract: A method of processing a number of force values is described. Each force value corresponds to a sensor location. The sensor locations are spaced apart along a direction. The method includes receiving the force values (S11). The method also includes determining whether the force values include one or more candidate peaks (S12). Each candidate peak corresponds to a local maximum of the force values. The method also includes, in response to at least one candidate peak exceeds a minimum force threshold (S13), interpolating the force values and estimating a number of peak coordinates and corresponding peak force values based on the interpolated force values and the candidate peaks (S14) which exceed the minimum force threshold.

Abstract: A touch sensor (1) for combined capacitive touch and force sensing is described. The touch sensor (1) includes number plurality of first electrodes (4) and a number of second electrodes (5). The second electrodes (5) are insulated from the first electrodes (4). The first and second electrodes (4, 5) form a grid for capacitive touch sensing. The touch sensor (1) also includes a transparent cover (6). The touch sensor (1) also includes a transparent piezoelectric film (3) arranged between the transparent cover (6) and the first and second electrodes (4, 5). The touch sensor (1) also includes a patterned counter electrode (8) disposed between the transparent piezoelectric film (3) and the transparent cover (6). The patterned counter electrode (8) is a conductive grid formed from the union of plurality of counter electrode line elements (9). A pitch of the counter electrode line elements (9) is larger than a pitch of the first electrodes (4) and/or second electrodes (5).

Abstract: A force-sensing touch panel (31) is described which includes a layer structure stacked in a thickness direction between first and second surfaces. The layer structure includes from first surface to second surface, a number of first electrodes (7) and a number of second electrodes (8), a layer of piezoelectric material (9), and a number of third electrodes (30). The first and second electrodes (7, 8) are configured to define a coordinate system for sensing a location of a force applied to the touch panel in a plane perpendicular to the thickness direction. The third electrodes (30) are configured such that signals received from the first, second and third electrodes (7, 8, 30) enable determining unique locations corresponding to two or more forces applied to the touch panel (31) concurrently.

Abstract: A method includes receiving (S1), from a touch panel (1), force values (23) corresponding to a plurality of piezoelectric sensors (5,6, 7), Each piezoelectric sensor corresponds to a physical location (xm, yn) on the touch panel. The method also includes receiving (S2) one or more user touch locations corresponding to user touches, The method also includes excluding (S5) all force values (23) corresponding to physical locations within a distance of a user touch location, and setting the remaining force values (23) as valid force values (S5). The method also includes interpolating and/or extrapolating (S6), based on the valid force values, one or more reconstructed force values (25) corresponding to same physical locations (xm, yn) as the respective excluded force values (23).

Abstract: A display system includes a driver for operating a panel having a plurality of pixels arranged by a plurality of first lines and at least one second line The driver includes a driver output unit for providing to the panel a single driver output for activating the plurality of first lines, the single driver output being demultiplexed on the panel to activate each first line.