CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority from Korean Patent Application No. 10-2019-0087042, filed on Jul. 18, 2019, which is hereby incorporated by reference for all purposes as if fully set forth herein.

BACKGROUND

Technical Field

Embodiments of the disclosure relate to display devices and driving circuits.

Description of the Related Art

Recent display devices may provide touch-based input features, which allow users easy, intuitive, and convenient entry of information or commands using their finger or a pen, as well as displaying images or information. Display devices should be able to figure out whether the user touches and to precisely sense the coordinates of the touch to provide touch-based entry.

Meanwhile, display devices may be designed in various form factors and be used in a diversity of environments. Thus, display devices may need diversified input schemes suited for their respective designs and environments.

BRIEF SUMMARY

According to embodiments of the disclosure, there may be provided a display device and driving circuit which are capable of quickly and efficiently performing a touch sensing function and photo sensing function.

According to embodiments of the disclosure, there may be provided a display device and driving circuit which are capable of efficiently performing displaying, touch sensing, and photo sensing.

According to embodiments of the disclosure, there may be provided a display device and driving circuit which may be rendered to have a high aspect ratio and high transmittance by effectively designing a photo sensor configuration.

According to embodiments of the disclosure, there may be provided a display device and driving circuit which may perform photo sensing by normally operating photo sensors even without all or some of the signal lines necessary for the operation of the photo sensors.

According to embodiments of the disclosure, there may be provided a display device and driving circuit which allows the user to perform various types of light-based inputs.

According to an embodiment of the disclosure, there may be provided a display device comprising a plurality of data lines disposed in a first direction and configured to be supplied with data signals, a plurality of gate lines disposed in a second direction that is transverse to the first direction and configured to be supplied with scan signals, a plurality of pixel electrodes respectively disposed in a plurality of subpixels, a plurality of common electrodes supplying a display common voltage upon display driving, a plurality of readout lines electrically connected with the plurality of common electrodes, and a plurality of photo transistors including a gate electrode, a first electrode, and a second electrode.

The second electrode of each of the plurality of photo transistors may be electrically connected with the common electrode. At least one of the first electrode and the gate electrode of each of the plurality of photo transistors may be electrically connected with a gate line for display driving.

According to an embodiment of the disclosure, there may be provided a display device comprising a plurality of data lines disposed in a first direction and supplied data signals, a plurality of gate lines disposed in a second direction and supplied scan signals, a plurality of pixel electrodes respectively disposed in a plurality of subpixels, a plurality of common electrodes supplied a display common voltage upon display driving, a plurality of readout lines electrically connected with the plurality of common electrodes, and a plurality of photo transistors including a gate electrode, a first electrode, and a second electrode.

The second electrode of each of the plurality of photo transistors may be electrically connected with the common electrode. The gate electrode of each of the plurality of photo transistors may be electrically connected with the second electrode of the corresponding photo transistor or the common electrode.

According to an embodiment of the disclosure, there may be provided a driving circuit for driving a display panel including a plurality of gate lines, a plurality of common electrodes, and a plurality of photo transistors including a first electrode, a second electrode, and a gate electrode.

According to an embodiment of the disclosure, there may be provided a driving circuit including a gate driving circuit supplying a scan signal whose voltage level is varied within a turn-off level voltage range to a gate line electrically connected with a first electrode of a photo transistor, a multi-sensing circuit supplying a touch driving signal, which has an amplitude corresponding to an amplitude of the scan signal, to a common electrode electrically connected with a second electrode of the photo transistor and sensing the common electrode, and a photo driving circuit supplying a photo control signal, which has an amplitude corresponding to the amplitude of the scan signal, to a gate electrode of the photo transistor.

According to an embodiment of the disclosure, there may be provided a driving circuit including a gate driving circuit supplying a scan signal whose voltage level is varied within a turn-off level voltage range to a gate line electrically connected with a first electrode and gate electrode of a photo transistor and a multi-sensing circuit supplying a touch driving signal, which has an amplitude corresponding to an amplitude of the scan signal, to a common electrode electrically connected with a second electrode of the photo transistor and sensing the common electrode.

According to an embodiment of the disclosure, there may be provided a driving circuit including a gate driving circuit supplying a scan signal whose voltage level is varied within a turn-off level voltage range to a gate line electrically connected with a gate electrode of a photo transistor, a multi-sensing circuit supplying a touch driving signal, which has an amplitude corresponding to an amplitude of the scan signal, to a common electrode electrically connected with a second electrode of the photo transistor and sensing the common electrode, and a photo driving circuit supplying a photo driving signal, which has an amplitude corresponding to the amplitude of the scan signal, to a first electrode of the photo transistor.

According to an embodiment of the disclosure, there may be provided a driving circuit including a gate driving circuit supplying a scan signal whose voltage level is varied within a turn-off level voltage range to a gate line, a multi-sensing circuit supplying a touch driving signal, which has an amplitude corresponding to an amplitude of the scan signal, to a common electrode electrically connected with a second electrode and gate electrode of the photo transistor and sensing the common electrode, and a photo driving circuit supplying a photo driving signal, which has an amplitude corresponding to the amplitude of the scan signal, to a first electrode of the photo transistor.

According to embodiments of the disclosure, the touch sensor and the photo sensor are enabled to perform sensing via the same readout line, allowing for rapid and efficient touch sensing and photo sensing.

According to embodiments of the disclosure, in the display panel, the touch sensor configuration and photo sensor configuration are designed to be organically combined with configurations for display driving, allowing for efficient displaying, touch sensing, and photo sensing.

According to embodiments of the disclosure, a configuration for display driving, a touch sensor configuration, and a photo sensor configuration all are included, allowing for a high aspect ratio and high transmittance via an efficient design of the photo sensor configuration.

According to embodiments of the disclosure, photo sensors may be normally operated to perform photo sensing even without all or some of the signal lines necessary for the operation of the photo sensors. Thus, the aperture ratio and transmittance may be enhanced.

According to embodiments of the disclosure, various kinds of light-based inputs may be provided to the user.

