Digitizer and Display Device Including the Same

Abstract

The invention relates to a digitizer and a display device including the same. The digitizer has a plurality of digitizer electrodes which have a pixel structure repeated in a first direction and are arranged in a second direction orthogonal to the first direction.

Description

technical field [0001] The invention relates to a digitizer and a display device comprising it. Background technique [0002] Recent display devices generally employ a touch input method in which a user directly touches a screen with a finger or an electronic pen to perform input. In particular, since this touch input method can be combined to a display screen without other input devices such as a keyboard or a mouse, it is widely used in portable terminals such as smartphones, notebook computers, or tablet computers. A touch input method. [0003] The touch input method enables input by directly touching a specific position of a display screen by a user, and thus can provide an intuitive and convenient user interface. Coordinates, making it also suitable for performing graphics operations such as computer-aided design. [0004] The device used for this touch input method and converting the coordinates of the pen into digital data input is called a digitizer. According to...

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Problems solved by technology

[0006] However, the digitizer of International Patent Publication No. WO2010 / 023861A1 has the following problems: the digitizer needs two metal patterns of the driving circuit wiring group and the sensing circuit wiring group, and in order to detect the position, it needs to be connected along the driving circuit wiring group and the sensing circuit wiring group. The arrangement direction of the sensing circuit wiring group is scanned separately in two directions

[0007] Furthermore, in the digitizer of International Patent Publication No. WO2010 / 023861A1, the sensing loop wiring is formed to cross the driving loop wiring and is divided into an area opposing the driving loop wiring and an area not opposing the driving loop wiring, since The direction of the magnetic force lines acting on the opposite area and the direction of the magnetic force lines acting on the non-opposing area are opposite to each other, so the induced current induced by the sensing circuit wiring cancels at the coil part where the magnetic force lines act in opposite directions to each other.

In order to accurately detect the input position coordinates of the pointing device in the digitizer, the voltage induced by the sensing circuit wiring needs to have a sufficient value, but there is a problem that sufficient voltage cannot be induced by the sensing circuit wiring due to this cancellation phenomenon.

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