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US 2023/0146875 A1Published application
Electroluminescent display device having pixel driving circuit
AssigneeLG Display Co., Ltd.
InventorsJinYeong KIM, HyeonHo SON, SeongHwan JU
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Abstract
An electroluminescent display device having pixel driving circuit is disclosed. The display device includes a pixel that includes sub-pixels and is divided into a sub-pixel area where the sub-pixels and a first pixel driving circuit are disposed and a common area where a second pixel driving circuit is disposed. Each of the sub-pixels includes a light emitting element including an anode electrode and a cathode electrode. The anode electrode is connected to a first common line which is connected to the second pixel driving circuit.
Claims19
An electroluminescent display device, comprising:
- a pixel that includes sub-pixels and having a sub-pixel area where the sub-pixels are disposed and a common area,
- wherein each of the sub-pixels includes a light emitting element including an anode electrode and a cathode electrode, and
- in the sub-pixel area, a first pixel driving circuit is disposed, and
- in the common area, a second pixel driving circuit is disposed, the second pixel driving circuit having a first common line and a second common line;
- the anode electrode of the light emitting element is electrically connected to the first common line, and
- wherein each of the sub-pixels further includes:
- a driving element including a source electrically connected to a first node, a gate electrically connected to a second node, and a drain electrically connected to a third node;
- a fourth transistor electrically connected to the first node;
- a second transistor electrically connected to the second node;
- a fifth transistor electrically connected to the third node;
- a third transistor electrically connected to the second node and the third node;
- a first capacitor having a first electrode electrically connected to the second node and a second electrode electrically connect to the second common line;
- a second capacitor having a first capacitor electrode and a second capacitor electrode, the first capacitor electrode electrically connected to the first common line and the second capacitor electrode electrically connected to either the first node or the second node;
- and
- a conductive layer disposed under the driving element, wherein the conductive layer is electrically connected to the first node or the gate of the driving element.
12 more elements
An electroluminescent display device, comprising:
- a light emitting element including an anode electrode electrically connected to a first common line supplied with a high-potential voltage and a cathode electrode;
- and
- a sub-pixel including a pixel driving circuit that supplies a driving current to the light emitting element,
- wherein the sub-pixel further includes:
- a driving element including a source electrically connected to a first node, a gate electrically connected to a second node, and a drain electrically connected to a third node;
- a first common switching circuit electrically connected to the anode electrode;
- a first capacitor including a first electrode electrically connected to the second node and a second electrode electrically connected to a fourth node;
- an second switching circuit electrically connected to the second node;
- a third switching circuit electrically connected to the third node;
- a first switching circuit electrically connected to the first node;
- and
- a second common switching circuit electrically connected to the fourth node.
9 more elements
An electroluminescent display device, comprising:
- a pixel that includes sub-pixels, and is divided into a sub-pixel area where the sub-pixels and a first pixel driving circuit are disposed and a common area where a second pixel driving circuit is disposed,
- wherein each of the sub-pixels includes:
- a light emitting element including an anode electrode and a cathode electrode, wherein the anode electrode is electrically connected to a first common line which is supplied with a high-potential voltage and electrically connected to the second pixel driving circuit;
- a driving element including a source electrically connected to a first node, a gate electrically connected to a second node, and a drain electrically connected to a third node;
- a fourth transistor electrically connected to the first node;
- a second transistor electrically connected to the second node;
- a fifth transistor electrically connected to the third node;
- a third transistor electrically connected to the second node and the third node;
- a first capacitor having a first electrode electrically connected to the second node and a second electrode electrically connect to a second common line which is electrically connected to the second pixel driving circuit;
- and
- a second capacitor having a first electrode electrically connected to the second node and a second electrode electrically connected to the first common line,
- wherein, in operation, when the two electrodes of the second capacitor are shorted, the high-potential voltage is applied to the gate of the driving element and the driving element is turned off.
9 more elements
Dependencies are inferred from the claim text.