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US 10,649,509 B2Granted
Display device capable of detecting whether a power cable is abnormally connected
AssigneeSamsung Display Co., Ltd.
InventorSeung-Jun Lee
Life of this patent
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Abstract
A display device includes a display panel including a plurality of pixels, first and second source boards connected to the display panel, and a control board. The control board is connected to the first source board via a first power cable and to the second source board via a second power cable. The control board is configured to control a power voltage provided to the pixels based on a first connection signal received from a first ground line of the first power cable and a second connection signal received from a second ground line of the second power cable.
Claims21
A display device, comprising:
- a display panel comprising a plurality of pixels;
- a first source board and a second source board connected to the display panel;
- and
- a control board connected to the first source board via a first power cable and connected to the second source board via a second power cable,
- wherein the control board is configured to control a power voltage provided to the pixels based on a first connection signal received from a first ground line of the first power cable and a second connection signal received from a second ground line of the second power cable,
- wherein the first connection signal is equal to a ground voltage received through the first ground line when the first power cable is normally connected between the control board and the first source board,
- wherein the control board comprises a detecting signal generator configured to receive the first connection signal from the first ground line and the second connection signal from the second round line, and generate a detecting signal based on the first connection signal and the second connection signal,
- wherein the detecting signal generator comprises:
- a first switching element comprising a base connected to a first node that receives the first connection signal, an emitter that receives a reference voltage, and a collector connected to a second node to which a first detecting signal is output as the detecting signal;
- and
- a second switching element comprising a base connected to a third node that receives the second connection signal, an emitter that receives the reference voltage, and a collector connected to a fourth node to which a second detecting signal is output as the detecting signal.
8 more elements
A display device, comprising:
- a display panel comprising a plurality of pixels;
- a first source board and a second source board connected to the display panel;
- and
- a control board connected to the first source board via a first power cable and connected to the second source board via a second power cable,
- wherein the control board is configured to control a power voltage, provided to the pixels based on a first connection signal received from a first ground line of the first power cable and a second connection signal received from a second ground line of the second power cable,
- wherein the first connection signal is equal to a ground voltage received through the first ground line when the first power cable is normally connected between the control board and the first source board,
- wherein the control board comprises:
- a detecting signal generator configured to receive the first connection signal from the first ground line and the second connection signal from the second ground line, and generate a detecting signal based on the first connection signal and the second connection signal,
- wherein the detecting signal generator comprises:
- an OR gate circuit comprising a first input terminal connected to a first node that receives the first connection signal, a second input terminal connected to a second node that receives the second connection signal, and an output terminal;
- a switching element comprising a base connected to a third node that is connected to the output terminal of the OR gate circuit, an emitter that receives a reference voltage, and a collector connected to a fourth node to which the detecting signal is output;
- a first pull-up resistor connected between the first node and the reference voltage;
- a second pull-up resistor connected between the second node and the reference voltage;
- a third pull-up resistor connected between the third node and the reference voltage;
- and
- a pull-down resistor connected between the fourth node and a ground terminal.
13 more elements
A display device, comprising:
- a display panel comprising a plurality of pixels;
- and
- a power management circuit configured to provide a power voltage to the pixels via first through (N)th power cables,
- wherein the first through (N)th power cables respectively comprise first through (N)th ground lines, and the power management circuit is configured to control the power voltage based on first through (N)th connection signals respectively received from the first through (N)th ground lines, wherein N is an integer greater than 1,
- wherein each of the first through (N)th connection signals is equal to a ground voltage received through the first through (N)th ground lines when the first through (N)th power cables are normally connected between the power management circuit and the display panel,
- wherein the power management circuit controls the power voltage to operate the pixels when each of the first through (N)th connection signals is equal to the ground voltage, and the power management circuit controls the power voltage such that the pixels are not operated when each of the first through (N)th connection signals is not equal to the ground voltage,
- wherein the first through (N)th connection signals are respectively received through only one pin of each of the first through (N)th power cables, and the power management circuit detects whether each of the first through (N)th power cables is abnormally connected between the power management circuit and the display panel using the only one pin of each of the first through (N)th power cables.
4 more elements
A display device, comprising:
- a display panel comprising a plurality of pixels;
- a first source board and a second source board connected to the display panel;
- and
- a control board connected to the first source board via a first power cable comprising a first detecting line and a second detecting line, and connected to the second source board via a second power cable comprising a third detecting line and a fourth detecting line,
- wherein a first terminal of the second detecting line is connected to a first terminal of the first detecting line via the first source board,
- wherein a first terminal of the third detecting line is connected to a second terminal of the second detecting line via the control board,
- wherein a first terminal of the fourth detecting line is connected to a second terminal of the third detecting line via the second source board, and
- wherein the control board comprises:
- a processor configured to provide a detecting signal to a second terminal of the first detecting line;
- an enable signal generator configured to receive a feedback signal from a second terminal of the fourth detecting line and to generate a first enable signal based on the feedback signal;
- and
- a power voltage controller configured to control a power voltage based on the first enable signal.
9 more elements
Dependencies are inferred from the claim text.