Lg Display Co., Ltd.

Ki Min Son

Seok Noh

Chang Hee Kim

Ki Bok Park

Ki Won Son

Seung Ho Heo

Dong Hyun Lee

Seo Jun Yeom

Hun Ki Shin

Ye Won Hong

A pixel circuit comprises a first switch element comprising a first electrode to which an initialization voltage is applied, a gate electrode to which a initialization pulse is applied, and a second electrode connected to a second node; a second switch element comprising a first electrode connected to a third node or a fourth node, a gate electrode to which a sensing pulse is applied, and a second electrode to which a reference voltage is applied; a third switch element comprising a first electrode to which a data voltage is applied, a gate electrode to which a scan pulse is applied, and a second electrode connected to the second node; and a fourth switch element comprising a first electrode connected to the third node, a gate electrode to which a first emission control pulse is applied, and a second electrode connected to the fourth node.

Pixel circuit and display device including the same

A pixel circuit and a display panel including the same are disclosed. The display panel includes: an individual switch element configured to supply a pixel driving voltage to a first sub-pixel in response to a gate signal; and a shared switch element configured to supply the pixel driving voltage to second and third sub-pixels in response to the gate signal. Each of the individual switch element and the shared switch element is a transistor having a channel width. The channel width of the shared switch element is larger than the channel width of the individual switch element.

Pixel circuit and display panel including the same

A pixel circuit of a display device includes a driving element comprising a first electrode connected to a first node to which a pixel driving voltage is applied, a first gate electrode connected to a second node, a second electrode connected to a third node, and a second gate electrode connected to a fourth node, and configured to supply an electric current to a light-emitting element; a first switch element configured to be turned on according to a gate-on voltage and supply a data voltage to the second node; a first capacitor connected between the second node and the third node; a second capacitor connected between the third node and the fourth node; and a third capacitor connected between the fourth node and the first node, or between the fourth node and a power line to which the pixel driving voltage is applied.

Provided are a gate driving circuit and a display device including the same. The gate driving circuit includes a first controller configured to control a first control node to act as a pull-up control node to turn on a first transistor when an activation clock is input to the first controller for a first unit time, and to be deactivated when a deactivation clock is input thereto for a second unit time; and a second controller configured to control a second control node to act as a pull-up control node to turn on a second transistor when the activation clock is input to the second controller for the second unit time, and to be deactivated when the deactivation clock is input thereto for the first unit time.

Gate driving circuit and display device including the same

A gate driver according to an embodiment and a display device using the same are disclosed. The gate driver includes a plurality of signal transmitters, wherein an nth signal transmitter includes, a (1-1)th output circuit configured to output a carry signal to a first output node according to a voltage of a first control node and a voltage of a second control node, a (1-2)th output circuit configured to output a boosting signal to a second output node according to a voltage of the first control node and a voltage of the second control node, wherein the (1-2)th output circuit includes a pull-up transistor configured to apply a gate high voltage to the first output node, a pull-down transistor configured to apply a gate low voltage to the first output node, and a first capacitor connected between a gate of the pull-up transistor and the second output node.

Gate driver and display device using the same

A pixel circuit and a display panel including the same may include a driving element including a gate connected to a first node to which a data voltage is configured to be applied, a first electrode connected to a high-potential voltage line, and a second electrode connected to a second node; a first switch element connected between the second node and a third node; a second switch element connected between the second node and a fourth node; a third switch element connected between the fourth node and a reference voltage line; a first capacitor connected between the first node and the third node; and a second capacitor connected between the third node and the fourth node.

Pixel circuit and display panel including same

An inverter circuit, a gate driver using the same, and a display device according to an embodiment are discussed. The inverter circuit can include a first transistor connected between a high potential voltage line and a first node; a second transistor having a gate connected to the first node and turned on according to a voltage of the first node to charge a second control node to a high potential voltage of the high potential voltage line; a third transistor having a gate connected to a first control node, a first electrode connected to the first node, and a second electrode connected to the second control node; and a fourth transistor having a gate connected to the first control node, a first electrode connected to the second control node, and a second electrode connected to a low potential voltage line.

Inverter circuit, gate driver using the same, and display device

A display panel and an electronic device including the same are disclosed. A circuit layer of the display panel includes at least a first transistor and a second transistor. The first transistor includes a first oxide semiconductor pattern, a gate electrode, a first electrode in contact with one side of the first oxide semiconductor pattern, a second electrode in contact with the other side of the first oxide semiconductor pattern, and a first-first metal pattern disposed on the substrate to overlap the first oxide semiconductor pattern. The second transistor includes a second oxide semiconductor pattern, a gate electrode, a first electrode in contact with one side of the second oxide semiconductor pattern, a second electrode in contact with the other side of the second oxide semiconductor pattern, a first-second metal pattern disposed on the substrate to overlap the second oxide semiconductor pattern, and a second metal pattern disposed between the second oxide semiconductor pattern and the first-second metal pattern.

Display panel and electronic device including same

A pixel circuit and a display device including the same are disclosed. The pixel circuit of the present disclosure includes: a driving element including a first electrode connected to a first node to which a pixel driving voltage is applied, a gate electrode connected to a second node, and a second electrode connected to a third node; a first switch element configured to supply a data voltage of pixel data to a fourth node in response to a scan pulse; a second switch element configured to supply an initialization voltage to the second node in response to a first initialization pulse; a third switch element configured to supply a reference voltage lower than the initialization voltage to the third node in response to a sensing pulse; and a fourth switch element configured to supply the reference voltage to the fourth node in response to a second initialization pulse.

The present disclosure is directed to a gate driver circuit configured to prevent a light-emitting element of a display device from emitting light in a sensing mode. The gate driver circuit allows a plurality of scan lines of the display device being concurrently sensed by pre-charging a node of the gate driver circuit prior starting a sensing mode. The present disclosure provides the benefit of sensing a greater number of pixels of a display in a shorter time while also ensuring that a sufficient charge is provided by the pre-charged node for a plurality of pixels of the plurality of scan lines to be sensed concurrently.

A gate driver according to an embodiment and a display device using the same are discussed. The gate driver can output a gate signal to a pixel circuit having a driving element connected between a first power line and a first node, a light-emitting element connected between the first node and a second power line, and a switching element connected between the first node and a third power line and driven by the gate signal. The gate driver includes a first circuit unit to receive a carry signal from a previous signal transmission unit to charge or discharge a first control node and a second control node, and a second circuit unit having a first buffer transistor and a second buffer transistor configured to output the gate signal based on a first clock signal and a first low potential voltage according to potentials of the first and second control nodes.

A pixel circuit and a display device including the pixel circuit are discussed. The pixel circuit can include a driving element including a first electrode connected to a first node to which a pixel driving voltage is applied, a gate electrode connected to a second node, and a second electrode connected to a third node; a first switch element including a first electrode connected to the third node, a gate electrode to which a first light emission control pulse is applied, and a second electrode connected to a fourth node; a second switch element including a first electrode connected to the third node, a gate electrode to which a second light emission control pulse is applied, and a second electrode connected to a fifth node; and a light emitting device including an anode connected to the fifth node, and a cathode electrode to which a low potential power voltage is applied.

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Paju-si, South Korea

Ki Min Son