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US 11,600,222 B2Granted
Light-emitting circuit having bypass circuit for reducing the possibility of the light-emitting unit illuminating in the dark state
AssigneeInnolux Corporation
InventorsMing-Chun Tseng, Kung-Chen Kuo, Lien-Hsiang Chen, Chi-Lun Kao
Life of this patent
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Abstract
A light-emitting circuit is provided herein, which includes a light-emitting unit, a driving transistor, and a bypass transistor. The driving transistor is configured to drive the light-emitting unit. The bypass circuit diverts the current flowing from the driving transistor to the light-emitting unit for reducing the possibility of the light-emitting unit illuminating in the dark state.
Claims13
A light-emitting circuit, comprising:
- a light-emitting unit;
- a driving transistor, configured to drive the light-emitting unit;
- and
- a bypass circuit, electrically connected to a node between the light-emitting unit and the driving transistor, wherein the bypass circuit diverts a current flowing from the driving transistor to the light-emitting unit;
- a light-emitting transistor, electrically connected between the light-emitting unit and the driving transistor, wherein the driving transistor generates a driving current and the light-emitting transistor provides the driving current to the light-emitting unit based on a light-emitting signal;
- a first switch transistor, providing the data signal to an intermediate node based on a scan signal;
- and
- a second switch transistor, electrically connected between the intermediate node and a gate terminal of the driving transistor, wherein the second switch transistor provides the data signal of the intermediate node to the gate terminal of the driving transistor based on the scan signal so that the driving transistor generates the driving current based on the data signal, wherein when the driving transistor is turned off based on the data signal, the driving transistor generates a leakage current, wherein the bypass circuit diverts the leakage current flowing from the driving transistor to the light-emitting unit;
- wherein the bypass circuit further comprises:
- a first bypass transistor, electrically connected to a node between the light-emitting transistor and the light-emitting unit, wherein the gate terminal of the first bypass transistor is electrically connected to the intermediate node and the first bypass transistor diverts the leakage current based on the data signal;
- a first bypass capacitor, electrically connected to the gate terminal of the first bypass transistor and storing the data signal received by the gate terminal of the first bypass transistor;
- a second bypass transistor, electrically connected between the intermediate node and the gate terminal of the first bypass transistor, wherein the gate terminal of the second bypass transistor receives the light-emitting signal;
- and
- a second bypass capacitor, electrically connected to the intermediate node.
11 more elements
A light-emitting circuit, comprising:
- a light-emitting unit
- a driving transistor, configured to drive the light-emitting unit
- a bypass circuit, electrically connected to a node between the light-emitting unit and the driving transistor, wherein the bypass circuit diverts a current flowing from the driving transistor to the light-emitting unit;
- a light-emitting transistor, electrically connected between the light-emitting unit and the driving transistor, wherein the driving transistor generates a driving current and the light-emitting transistor provides the driving current to the light-emitting unit based on a light-emitting signal;
- a first switch transistor, providing the data signal to an intermediate node based on a scan signal;
- and
- a second switch transistor, electrically connected between the intermediate node and a gate terminal of the driving transistor, wherein the second switch transistor provides the data signal of the intermediate node to the gate terminal of the driving transistor based on the scan signal so that the driving transistor generates the driving current based on the data signal, wherein when the driving transistor is turned off based on the data signal, the driving transistor generates a leakage current, wherein the bypass circuit diverts the leakage current flowing from the driving transistor to the light-emitting unit;
- wherein the bypass circuit further comprises:
- a first bypass transistor, electrically connected to a node between the light-emitting transistor and the light-emitting unit, wherein the gate terminal of the first bypass transistor is electrically connected to the intermediate node and the first bypass transistor diverts the leakage current based on the data signal;
- a first bypass capacitor, electrically connected to the gate terminal of the first bypass transistor and storing the data signal received by the gate terminal of the first bypass transistor;
- and
- a fourth bypass transistor, electrically connected to a node between the light-emitting transistor and the light-emitting unit and electrically connected to the first bypass transistor, wherein the gate terminal of the fourth bypass transistor receives the light-emitting signal.
9 more elements
A light-emitting circuit, comprising:
- a light-emitting unit
- a driving transistor, configured to drive the light-emitting unit
- a bypass circuit, electrically connected to a node between the light-emitting unit and the driving transistor, wherein the bypass circuit diverts a current flowing from the driving transistor to the light-emitting unit;
- a light-emitting transistor, electrically connected between the light-emitting unit and the driving transistor, wherein the driving transistor generates a driving current and the light-emitting transistor provides the driving current to the light-emitting unit based on a light-emitting signal;
- a first switch transistor, providing the data signal to an intermediate node based on a scan signal;
- and
- a second switch transistor, electrically connected between the intermediate node and a gate terminal of the driving transistor, wherein the second switch transistor provides the data signal of the intermediate node to the gate terminal of the driving transistor based on the scan signal so that the driving transistor generates the driving current based on the data signal, wherein when the driving transistor is turned off based on the data signal, the driving transistor generates a leakage current, wherein the bypass circuit diverts the leakage current flowing from the driving transistor to the light-emitting unit;
- wherein the bypass circuit further comprises:
- a first bypass transistor, electrically connected to a node between the light-emitting node and the light-emitting unit, wherein the first bypass transistor diverts the leakage current based on a voltage of a first bypass node;
- a first bypass capacitor, electrically connected to the first bypass node and storing the voltage of the first bypass node;
- a second bypass transistor, electrically connected to a node between the light-emitting transistor and the light-emitting unit and electrically connected to the first bypass transistor, wherein the gate terminal of the second bypass transistor receives the light-emitting signal;
- a third bypass transistor, providing a supply voltage to the first bypass node based on a voltage of the gate terminal of the driving transistor;
- and
- a fourth bypass transistor, providing a second voltage to the first bypass node based on the second voltage.
11 more elements
Dependencies are inferred from the claim text.