G2touch Co., Ltd.

Other

Kolon Industries, Inc.

Sindoricoh Co., Ltd.

Sam Jung Co., Ltd.

Sung Ho Lee

Si Min Kim

Ook Kim

Yun Jo Kim

Chan Seok Yoon

Dong S Kim

Jae S Kim

Jae K Chong

Jae Y Lee

Seong I Jang

Min H Song

The present invention relates to a capacitive touch input device utilizing the capacitive sensing method for detecting touch inputs from a finger or a similar conductive object. More specifically, it pertains to a capacitance detection device designed to facilitate the detection of touch coordinates based on the vertical movement of a pen by employing a capacitive detection sensor composed of a composite trapezoidal shape.

Capacitive detection device utilizing trapezoidal subshape

The present invention involves driving multiple capacitors, including a shielding capacitance (Cin_sd), to minimize voltage fluctuations detected on the CDA signal line (), thereby enhancing the resolution of the ADC. The additional capacitance (Cobj) generated between the CDA () and the object () due to the appearance of the object () is detected in the form of voltage. By analyzing with an ADC of improved resolution, it is possible to detect the presence of the object () more reliably.

Reduction of capacitance and forcing of different voltages for capacitor

The present invention relates to the CDA that constitutes the capacitive detection device of the present invention placed on the upper side of the conductor. It aims to narrow the width of the far-distance CDA signal line, which was previously widened to reduce resistance, to be the same as the width of the near-distance signal line. As a result, this reduces the time constant in the far-distance CDA, enhancing the detection speed, and minimizes the width of the Dead Zone caused by the signal line, thereby reducing object detection errors or touch coordinate calculation errors.

How to layout the signal lines on the upper layer of the conductor

The present invention presents a method for quickly transmitting and receiving pen Tx and Rx signals by reconfiguring a CDA column consisting of a large number of CDAs into a CDA column consisting of one CDA, and reducing the time of the process by detecting objects by quick search with the same CDA column, thereby preventing loss of signals that may occur in Tx/Rx with the pen and reducing current consumption.

Object sensing device and sensing method composed of different CDA areas

The present invention relates to a method of configuring a sensor pattern that linearly detects touch signals based on changes in the active area when a pen touches the ODA that constitutes the object detection device of the present invention installed on the conductive surface. It also pertains to a method of constructing a sensor pattern that minimizes moiré interference with the display device. As a result, the readability of pen-written characters is enhanced, and visibility is improved due to moiré avoidance.

Object location detection device

The present invention reconfigures the Capacitor Detect Area (CDA) constituting two columns to reduce the number of CDAs constituting one column and increase the number of CDAs constituting the other so that object separation operation is possible in the column in which the number of CDAs is increased.

Detectors consisting of multiple different areas and object detection devices using them

The present invention can form a stable system by minimizing the sensitivity distribution of the system caused by the area difference of the object to be detected. This is achieved by adjusting the density of the empty holes formed in the object to be detected, thereby maintaining the effective area of the object to be detected constant.

How to organize and utilize empty holes

The present invention involves replicating the existing state in a system to store in memory for detecting variations due to added factors. Based on the stored values in the memory, changes in the system are detected. A certain electronic circuit is used to extract these replicated values, and the values output from the electronic circuit are fed back. The adjusted input variables are then extracted and stored in memory.

How to build a replication system and extract replication values

The present invention operates multiple capacitors to minimize the fluctuation of voltage detected on the CDA signal line, thereby enhancing the resolution of the ADC. The object capacitance (Cobj) generated between the CDAand the objectdue to the appearance of the objectis detected in the form of voltage. By analyzing with an ADC of improved resolution, it is possible to detect the presence of the objectmore reliably.

To extract multiple signal lines from multiple switch groups simultaneously using one decoder

The present invention involves driving multiple capacitors, including a shielding capacitance (Cin_sd), to minimize voltage fluctuations detected on the CDA signal line, thereby enhancing the resolution of the ADC. The additional capacitance (Cobj) generated between the CDAand the objectdue to the appearance of the objectis detected in the form of voltage. By analyzing with an ADC of improved resolution, it is possible to detect the presence of the objectmore reliably.

To improve sensitivity by using a modified shielding capacity of parasitic capacity

The present invention relates to a method for improving detection sensitivity of an object capacitance by applying driving voltages having different phases to different driving signal lines to reduce the amplitude of a second sensing signal and increasing the difference between the first sensing signal and the second sensing signal. In addition, a driving voltage of a reverse phase is applied to the CDAs that do not detect an object, thereby contributing to an additional sensitivity improvement. The detection sensitivity of object capacitance is improved by increasing a ratio of charges stolen by a driving voltage in a reverse phase applied to a plurality of driving CDA compared to charges supplied by a driving voltage applied to a pair of driving CDA.

Object detection device and detection method using reverse phase driving voltage

Disclosed herein are a display device having an embedded touch screen and a method for detecting a touch, and more particularly, a display device having an embedded touch screen capable of preventing deterioration of image quality generated in the display device when a touch sensor and a sensor signal line are disposed in the display device and solving a problem that sensitivity of a detected touch signal is weakened due to a parasitic capacitance generated between the touch sensor and the sensor signal line and a signal line and components of the display device, and a method for detecting a touch.

Display device having embedded touch screen and method for detecting touch to prevent a signal line from being observed and remove an influence of a touch sensor

The present invention relates to a device and a method for detecting a capacitive touch signal of a finger of a human body or a touch input means having similar conductive properties to the finger, and relates to a device and a method for detecting a capacitive touch signal, in which alternating driving voltage is applied to one side of a sensing equivalent capacitor formed between a sensing pad and a non-sensing pad, and a touch detection unit detects a voltage difference generated from the sensing pad according to the occurrence or non-occurrence of a touch, thereby determining whether the touch occurs or not.

Growing community of inventors

Hwaseong-si, South Korea

Sung Ho Lee