Abstract: A touch display includes an active display screen, a display driving circuit, a touch system circuit, and a display/touch signal gating-switch and output circuit or display/touch signal loading and merge circuit. A vertical blanking time exists between each two display times of a display screen electrode, during the time, the display screen does not execute display driving, and stops scanning the row electrodes, the column electrodes and the COM electrode maintain an original output state or a certain preset output signal, and a part or all of active devices of the display screen are in an off state; during a time of transmitting a display signal by the display screen electrode, due to a transient potential difference of an applied touch signal between the electrodes, the active devices of the display screen are enabled to maintain the off state.

Abstract: A capacitive touch screen is provided. Return-loop electrodes of touch signals are established on the capacitive touch screen or a product where the capacitive touch screen is applied, and touch detection electrodes for detecting changes of the touch signals and the touch return-loop electrodes are respectively connected to different output ends of a touch excitation source, so that a closed touch loop is formed by the touch excitation source, the touch detection electrodes, the touch return-loop electrodes, and coupling capacitances between the touch detection electrodes and the touch return-loop electrodes, and the touch signals flowing into the touch detection electrodes from the touch excitation source again flows back to the touch excitation source from the touch return-loop electrodes. Then, the touch system is isolated from other systems. Touch information is acquired by detecting the change of the current in the touch signals having specific frequencies or other specific characteristics.

Abstract: A touch display is provided, in which at least one substrate of an active LCD screen has an active device array and a row electrode group and a column electrode group connected to an active device array, and another substrate of the display screen has a common (COM) electrode; and after a normal display time ends, Liquid Crystal (LC) pre-driving signals are applied to a part or all of row and column electrode lines and the COM electrode of the display screen, an intensity of the LC pre-driving signal enables a potential difference between the row and the column electrode lines and the COM electrode with the applied LC pre-driving signals to be not smaller than an LC saturation driving voltage, such that LC molecules between the row and the column electrode lines and the COM electrode with the applied LC pre-driving signals are in a determined arrangement state.

Abstract: An active touch system is provided, in which sensing electroding units in an array and two groups of intersecting control electrodes and detecting lines are disposed on a touch substrate, and the detecting lines are connected to sensing electrodings through active devices. The control electrodes are used to control on and off of the active devices, and the detecting lines are used to apply touch excitation signals to the sensing electrodings, and detect a leakage current of a sensing electroding to a finger or other touch object. A position of the finger or other touch object on the touch substrate is found by determining a sensing electroding unit generating the leakage current. The method of obtaining touch signals is improved in the hardware sensing stage, so that the judgment procedure after detection is greatly simplified, and the judgment of multi-point touch becomes easy and natural.

Abstract: A touch flat panel display includes a display screen and a driving circuit; output ends of a display driving circuit in the driving circuit are respectively connected with electrode lines of the display screen through units of a display/touch signal gating-switch and output circuit or a display/touch signal loading and merge circuit. The units of the display/touch signal gating-switch and output circuit or the display/touch signal loading and merge circuit are connected with a touch excitation source through one or more circuit paths; the display/touch signal gating-switch and output circuit or the display/touch signal loading and merge circuit enables more than two electrode lines of a display screen to simultaneously communicate with the touch excitation source for providing touch excitation energy; and the touch system circuit time division detects changes of touch signals on a circuit path connecting the touch excitation source with the electrode lines of the display screen.

Abstract: A touch control screen used in integration with a display panel and a touch with feedback system is provided. When an operator operates the touch with feedback system, sensing lines and a touch control unit detect a position touched by the operator, a touch feedback driving unit applies a specific electrical signal to touch feedback electrodes to transfer the electrical signal to a finger tip of the operator according to the touched position, so the operator acquires touch information. A display is overlaid on the touch control screen, a control circuit enables the touch feedback driving unit to apply different electrical signals on the touch feedback electrodes according to positions touched by the operator, different display elements, and different statuses of the display elements on a display picture, so the operator acquires the touch information such as a sense of a shape and texture of the display element.

Abstract: A touch screen and a flat panel display are provided, and more particularly a touch flat panel display is provided. The touch flat panel display includes a display screen and a driving circuit. A touch excitation source providing touch excitation energy is connected with a power end of a last-stage driving cell of the driving circuit, an output end of the last-stage driving cell is connected with an electrode line of the display screen, and the touch system circuit judges whether the electrode line of the display screen connected with the driving unit is touched by detecting a change of a touch signal flowing through the power end or the output end of the last-stage driving cell.

Abstract: A touch display is provided, which includes a flat panel display (FPD), a display driving circuit, a touch system circuit, and a display/touch signal gating-switch and output circuit or display/touch signal loading and merge circuit. The touch system circuit has a touch excitation source and a touch signal detection unit. Row electrode groups and column electrode groups are disposed on a substrate of the display screen, and the touch system circuit applies a touch signal to a certain electrode line in the row electrode group or the column electrode group and detects change of the touch signal on the electrode line, so as to detect whether the electrode is touched.

Abstract: In the field of touch screens and more particularly capacitive touch screens, a digital capacitive touch screen is provided, which includes a touch substrate and a touch system circuit. The touch system circuit has a touch excitation source and a touch signal detection unit. At least two staggered electrode groups are disposed on the touch substrate, and multiple electrode lines of the electrode groups are connected to the touch excitation source. In a working period of the touch system circuit, for at least one moment, the touch excitation source applies touch signals to more than two electrode lines at the same time, and the touch signal detection unit detects the change of the touch signal on at least one of the electrode lines. Thereby, a high-definition and large-sized digital capacitive touch screen is obtained. The digital capacitive touch screen has a simple structure, low cost, and high reliability.

Abstract: A touch screen is provided, which includes a substrate and a touch system circuit. Two or more groups of intersected row electrode groups and column electrode groups are disposed on the substrate. The touch system circuit has a touch excitation source and a touch signal detection unit. The touch signal detection unit has a signal detection channel, a data convert channel, and a data processing and timing control unit. The touch system circuit applies a touch signal to an electrode line in the row electrode groups or column electrode groups, and detects a change of the touch signal on the electrode line, so as to detect whether the electrode is touched or not.

Abstract: A touch screen flat panel display (FPD) is provided, which includes a display screen, a display driving circuit, a touch system circuit, and the like. Related circuits in the touch screen FPD enable electrodes of the display screen to transmit display driving signals as well as touch signals, that is to say, the display driving and the touch detection multiplex the electrodes of the display screen, such that the FPD is not only used for normal display but also used for realizing touch detection. By applying the touch signal simultaneously to detecting lines and non-detecting lines, the flow of the touch signal between the detecting lines and between the detecting line and the non-detecting line is reduced, thus controlling the flow direction of the touch signal, and increasing the accuracy of determining touched electrodes.

Abstract: A capacitive digital caliper comprises a main beam and a slider, a rack and a gear are mounted on the main beam and the slider respectively. This gear system changes the linear position x on the main beam into angular position(?+2N?), and the angular position is measured by a capacitive measuring device. The capacitive measuring device of angular position is seally isolated from the rack and gear by a seal cavity and a seal member. Therefore, the caliper can be used under a poor condition at present of particulate and fluid contaminants. The present invention is particularly suitable for being used in the field of mechanical work.