CROSS-REFERENCE TO RELATED APPLICATION

The present application claims priority to and the benefit of Korean Patent Application No. 10-2020-0074366, filed on Jun. 18, 2020, the entire content of which is hereby incorporated by reference.

BACKGROUND

1. Field

Aspects of some embodiments of the present disclosure herein relate to an electronic device.

2. Description of the Related Art

Electronic devices may detect an external input applied externally. The external input may be a user's input. The user's input may include various types of external inputs such as a part of a user's body, light, heat, pen, or pressure. Electronic devices may recognize the coordinates of a pen using an electromagnetic resonance (EMR) scheme or active electrostatic (AES) scheme.

The above information disclosed in this Background section is only for enhancement of understanding of the background and therefore the information discussed in this Background section does not necessarily constitute prior art.

SUMMARY

Aspects of some embodiments of the present disclosure herein relate to an electronic device which detects an input from an active pen.

According to some embodiments of the inventive concept, an electronic device includes: a display layer, a display driver configured to generate a horizontal synchronization signal and a vertical synchronization signal for driving the display layer, a sensor layer on the display layer, and a sensor driver configured to receive the horizontal synchronization signal and the vertical synchronization signal from the display driver, and operate, based on the horizontal synchronization signal and the vertical synchronization signal, in a first mode in which a first input generated by an active pen is detected or a second mode in which a second input generated by a touch is detected.

According to some embodiments, the first mode may include a first interval in which an uplink signal is transmitted to the sensor layer and a second interval in which the first input is detected from a downlink signal provided from the active pen, and the second interval may progress after the first interval.

According to some embodiments, the first interval may start after a predetermined time after a level change time point of the vertical synchronization signal.

According to some embodiments, the predetermined time may be synchronized with a time at which the horizontal synchronization signal is counted X times, wherein the X may be 0 or a positive integer.

According to some embodiments, the second interval may include a non-detection interval in which the first input is not detected and a detection interval in which the first input is detected, wherein the non-detection interval and the detection interval may be alternately repeated.

According to some embodiments, the detection interval may start after a predetermined time after a level change time point of the horizontal synchronization signal.

According to some embodiments, the non-detection interval may temporally overlap a level change time point of the horizontal synchronization signal.

According to some embodiments, the downlink signal may include a pen transmission signal, wherein a frequency of the pen transmission signal may be higher than a frequency of the horizontal synchronization signal.

According to some embodiments, the downlink signal may include a pen transmission signal, wherein the pen transmission signal may include a first signal interval and a second signal interval, and the pen transmission signal may maintain a predetermined level in the first signal interval, and may have a pulse waveform in the second signal interval.

According to some embodiments, the first signal interval may temporally overlap the non-detection interval, and the second signal interval may temporally overlap the detection interval.

According to some embodiments, the sensor driver may sequentially operate in the first mode and the second mode while an image of one frame is displayed on the display layer.

According to some embodiments, the sensor driver may sequentially operate in the second mode and the first mode while an image of one frame is displayed on the display layer.

According to some embodiments, the sensor driver may alternately repeat the first mode and the second mode at least two times while an image of one frame is displayed on the display layer.

According to some embodiments, the sensor driver may continuously repeat the first mode at least two times and continuously repeat the second mode at least two times while an image of one frame is displayed on the display layer.

According to some embodiments, the display layer may include a base layer, a circuit layer on the base layer, a light-emitting element layer on the circuit layer, and an encapsulation layer on the light-emitting element layer, wherein the sensor layer may be directly on the encapsulation layer.

According to some embodiments, the sensor layer may include a plurality of electrodes and a plurality of intersecting electrodes intersecting with the plurality of electrodes, the sensor driver may detect the first input based on detection signals respectively received from the plurality of electrodes and the plurality of intersecting electrodes, and the sensor driver may provide a signal to each of the plurality of electrodes, and detect the second input based on detection signals respectively received from the plurality of intersecting electrodes.

According to some embodiments of the inventive concept, an electronic device includes a display layer, a sensor layer on the display layer and including a plurality of electrodes and a plurality of intersecting electrodes intersecting with the plurality of electrodes, a display driver configured to drive the display layer, and a sensor driver configured to drive the sensor layer. According to some embodiments, the display layer may operate in synchronization with a vertical synchronization signal and a horizontal synchronization signal, and the sensor driver may provide an uplink signal to the sensor layer based on the vertical synchronization signal, and detect a pen transmission signal provided from an active pen based on the horizontal synchronization signal.

According to some embodiments, the sensor driver may output the uplink signal to the sensor layer after counting the horizontal synchronization signal X times after a level change time point of the vertical synchronization signal, wherein the X may be 0 or a positive integer.

According to some embodiments, wherein the sensor driver may detect the pen transmission signal after a predetermined time after a level change time point of the horizontal synchronization signal.

According to some embodiments, the sensor driver may operate in a first mode in which a first input generated by the active pen is detected or a second mode in which a second input generated by a touch is detected, the sensor driver may detect the first input based on detection signals respectively received from the plurality of electrodes and the plurality of intersecting electrodes, and the sensor driver may provide a signal to each of the plurality of electrodes, and detect the second input based on detection signals respectively received from the plurality of intersecting electrodes.

