Moreover, when the capacitive pen is held on the touch sensor by an external conductive object e. The capacitive writing device of claim 3, wherein the control circuit further executes the following operations: If a second voltage variation which exceeds a second threshold is measured by the circuit, it is determined that something is approaching the touch area near the wire. The stylus has a conductive pen head and a pen body. Each of these conductive strips can be made up by a plurality of conductive pads and connecting lines 19 connected to the conductive pads in series.
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In the process of mutual capacitive detection, one of the first conductive layer and the second conductive layer is driven, while the other of the first conductive layer and the second conductive layer is detected.
This area should cover the intersections of several conductive strips. The noise effect of the display on the signal of each sensor corresponds to the distance between the display and the sensor. In another example egalaxx the present invention, the first and second conductive strips A and B are disposed on a co-planar sensing layer.
eGalax_eMPIA Technology Inc. (3556.TWO)
The above embodiments are only used to illustrate the principles of the present invention, and they should not be construed as to limit the present invention in any way. Next Patent Capacitive sensor pa The invention, upon receiving an input signal, sums the absolute values of the difference of each pair of values adjacent to each other within a series of detected signal values etalax suppress the interference of low-frequency noise.
The approach or touch of a pen head with an area smaller than rmpia capacitive pens can be em;ia. By comparing the difference between the reference image and the image of capacitive values later detected, the touch or approach of an external conductive object can be determined, and furthermore, the evalax touched or approached by the external conductive object can be determined. When one or more external conductive objects approach or touch the sensing device, said image can be regarded as a photographed touch image, which is particularly useful in determining approaches or touches of a plurality of external conductive objects.
For example, the width of the pen head is less than the gap between empi center of a conductive strip and the center of another conductive strip, or less than the gap between the center of a first conductive strip and the center empa another adjacent first conductive strip.
In another example of the present invention, each first region or second region determined to be approached or touched by the capacitive pen is a first region or a second region approached or touched by a pen, wherein the maximum width on the touch sensor touched by the pen is less than or equal to 3 mm.
Method and device for dual-differential sensing. Then, images are obtained one or several consecutive times.
EETI Index English
A conventional mutual capacitive sensor is shown includes an egzlax surface layer, a first conductive layer, a dielectric layer, a second conductive layer. A method for detecting an approach or a touch of a small area proposed by the present invention includes: A two-dimension 2D sensing information is analyzed for determining touch related sensing information.
United States Patent From the above it is clear that prior art still has shortcomings. When the human body holding the pen body is not electrically coupled to the conductive pen head, the location of the conductive pen head can be determined by sufficient change in capacitive coupling caused by the conductive pen head capacitively coupling to the guarding pattern and the conductive strip pattern.
Besides, the noise effect of the display on each value of the sensing information egaalax to the distances between the display and the three sensors, respectively. In addition, the conductive pen head 32 further includes a contact portion 33wherein the degree of curing of the contact portion 33 is different from that of other non-contact portion of the etalax pen head In another example of the present invention, there is a transmission interface between the controller and the host The first and the second touch screens have a detecting mode for detecting an approach or touch of an external conductive object.
The capacitive writing device of claim 1, wherein the control circuit further executes the following operations: Thus, there is a need in the industry for a novel technique that solves these problems.
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When the driving signal is simultaneously provided to all conductive strips arranged in the first direction, the driven signal is also simultaneously provided to a plurality of emlia conductive strips. The sensing device is flexible and configured on a display. The mutual capacitive signals can be used for determining whether an external conductive object coupled to the ground is touching or approaching the touch screen or not even empla water or other conductive object not coupled to ground is on the touch screen.
The capacitive writing device of claim 4, wherein each first region or second region determined to be approached or touched ejpia the capacitive pen is a first region or a second region approached or touched by a pen, wherein the maximum width on the touch sensor touched by the pen is less than or equal to 3 mm. A method for parallel-scanning differential touch detection is disclosed herein. In an example of the present invention, the conductive pen head 32 is made by curing conductive fibers, for example, by optical or thermal curing after being bonded together.
The circuit is configured to connect to a conducting wire in a touch area for measuring a signal variation. Moreover, for better understanding and clarity of the description, some components in the drawings may not necessary be drawn to scale, in which some egalaax be exaggerated relative to others, and irrelevant parts are omitted.
In this example, the coordinates for each intersection are effectively a 2D coordinate consisting of the coordinate at the middle of two adjacent driven conductive strips and the coordinate of a sensed conductive strip.
The difference between each obtained image and the reference image is the image of change in capacitive coupling.