摘要:
A touch sensor array system comprises an array of sensor elements (12) each actively addressable by means of a switch device (16), for example two terminal devices such as diodes or MIMs, or TFTs, controlled by a driver circuit (22) to load a predetermined charge into a capacitor (14) of the element. Touching a sensor element dissipates this charge which is detected during a subsequent addressing stage by sensing particular charging characteristics with a monitoring circuit (24). With a row and column array, the elements (12) are addressed one row at a time at regular intervals using a row conductor (18) common to a row of elements. Each column of elements shares a column conductor (20) connected to the monitoring circuit. Various schemes are described enabling wired or isolated styli or a finger to be used as position designating means. The array is fabricated using thin film deposition techniques and high resolution arrays are easily achieved. The system can be used as a display overlay.
摘要:
An active, matrix addressed display device comprising an array of display elements 37, e.g. liquid crystal display elements, each connected in series with a diode ring type non-linear device (31) between associated row and column address conductors (34, 35), which non-linear device comprises two parallel conduction paths each containing at least three series-connected diode elements (e.g. A1-E1, A2-E2) and permitting current flow in a respective direction. The conduction paths share one or more intermediate diode elements (e.g. B1 or B1-D1). The one or more intermediate diode elements may be interconnected, either individually or as a group, in parallel with diode element(s) (e.g. B2 or B2-D2 respectively) of the other conduction path thereby providing alternative branches for fault tolerance but using fewer diode elements than usual for such purposes. Alternatively, the one or more intermediate diode elements (e.g. B1-D1) of one conduction path are interconnected in series between two diode elements (A2, B2) of the second conduction path so as to form the sole path between those two elements, thereby reducing the number of diode elements required for each non-linear element.
摘要:
The image sensor (1 a) has a transparent substrate (2) supporting a two dimensional array (3) of photosensitive and switching elements (4) with switching signal conductors (5) and data signal conductors (6) connected to the photosensitive and switching elements (4) for enabling individual photosensitive elements to be accessed. Two or more photosensitive elements are associated with each pair of switching signal and data signal conductors (5, 6) so that the number of conductors is reduced. The individual photosensitive elements are accessed by applying different signals to the switching signal conductor.
摘要:
A method of driving a matrix display device having an array of electro-optic display elements (12) each of which is connected in series with a two terminal non-linear device (15), such as a MIM, between associated row and column address conductors (16,17), in which the display elements are driven in a reset mode of operation by applying to the column address conductors data signals (D) and to the row address conductors selection signals (Vs) and reset signals (Va) to correct for non-uniformities in the characteristics of the non-linear devices, and in which in a row address period (Tl) a data signal (D) applied to a column conductor is preceded by its inverse ( D ¯ ), a reset signal (Va) is applied during the application of the inverse data signal, and a selection signal (Vs+) is applied during the application of the data signal in the latter part of the row address period in order to minimise differences in ageing of the non linear devices.
摘要:
A matrix display device comprises a row and column array of picture elements (12) each of which consists of a display element (14), e.g. a LC display element, connected in series with a two-terminal non-linear device 15, such as a MIM, between associated row and column address conductors (16,17) to which selection and data signals are applied by a scanning signal drive circuit (20) and a data signal drive circuit (22) respectively, and a reference element circuit (34), comprising a non-linear device (35) in series with a capacitor (36), forming part of a feedback arrangement through which picture element drive voltages are controlled (25) so as to compensate for the effects of ageing of the non-linear devices. The reference circuit is driven like the picture elements, with a scanning signal waveform and voltage signal (V A ) applied to opposite sides, and the picture element drive voltages are adjusted in accordance with predetermined changes in the voltage across the capacitor (36). The reference non-linear device (35) can be provided on the same support (10) as the picture element devices (15). The capacitor (36) can be constituted by an electro-optic element corresponding to the display elements (14). A plurality of such reference circuits may be employed, extending in one or more rows and driven by row and column conductors.