Stylus and controller
AssigneeWacom Co., Ltd.
InventorsHideyuki Hara, Sadao Yamamoto, Shunya Saito
Life of this patent
Estimating the term…
Abstract
A controller of an in-cell type liquid crystal display device is provided. The controller controls first and second electrodes that intersect each other, supplies a pixel driving voltage to the first electrodes during a pixel driving period, and detects a stylus position using the first and second electrodes during a stylus detection period different from the pixel driving period. The controller transmits, using the second electrodes, a command requesting a transmission of a downlink signal to the stylus. The controller detects, using the first and second electrodes, the downlink signal transmitted from the stylus in response to the command, and detects the stylus position based on the detected downlink signal.
Claims15
A controller of a touch sensor device which is overlaid with a display device, the controller controlling first and second electrodes that intersect each other and detecting a stylus position using the first and second electrodes during a stylus detection period, wherein
- the controller, by driving the second electrodes, transmits a command requesting a transmission of a downlink signal to the stylus, wherein the second electrodes are disposed closer to a display surface of the display device than the first electrodes so as to be disposed between the display surface and the first electrodes, and
- the controller detects, using the first and second electrodes, the downlink signal transmitted from the stylus in response to the command, and detects the stylus position based on the detected downlink signal.
A method for use with a sensor controller, wherein the sensor controller is coupled to an array of electrodes to perform a stylus detection operation, the method comprising:
- prior to detecting a stylus, driving the array of electrodes to transmit a command a first number of times per one cycle, wherein the command includes setting information to be used by the stylus to communicate with the sensor controller, and
- after detecting the stylus, transmitting the command a second number of times per one cycle, wherein the second number is less than the first number.
Dependencies are inferred from the claim text.