Display driver circuits having multi-function shared back channel and methods of operating same
AssigneeSamsung Electronics Co., Ltd.
InventorsDong-Hoon Baek, JaeYoul Lee
Life of this patent
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Abstract
Display driver circuits include a multi-function driver, which is configured to support first and second modes of operation. The multi-function driver supports the first mode of operation in response to a first control signal by driving a bus with an output signal, which has a value that indicates a locked or unlocked status of a clock signal therein. The multi-function driver also supports the second mode of operation in response to a second control signal by driving the bus with multi-bit data that is unrelated to the locked or unlocked status of the clock signal.
Claims21
A display driver circuit, comprising:
- a first multi-function driver configured to support a first mode of operation in response to a first control signal by driving a bus with a first output signal having a value that indicates a locked or unlocked status of a first clock signal therein and further configured to support a second mode of operation in response to a second control signal by driving the bus with first data unrelated to the locked or unlocked status of the first clock signal.
A display driver circuit, comprising:
- a plurality of drivers having respective output terminals electrically coupled in common to a shared back channel signal line, said plurality of drivers configured to respond to a first monitoring command provided in common thereto by informing the shared back channel signal line of the status of a signal or device therein and further configured to individually respond to a read command provided one-at-a-time thereto by driving the shared back channel signal line with respective read data.
A display driver circuit, comprising:
- a plurality of drivers having respective first terminals electrically connected in common to a shared back-channel signal line in a wired-OR configuration, said plurality of drivers configured to support a clock training mode of operation by driving the shared back-channel signal line with a first signal that designates an unlocked status of at least one clock within said plurality of drivers and further configured to support one-at-a-time data read modes of operation by driving the shared back-channel signal line with respective streams of data during non-overlapping time intervals.
A method of operating a display device, comprising:
- providing a training clock to a first multi-function driver circuit in response to detecting an unlocked status of a first clock generated therein via a common bus connected to an output of the first multi-function driver circuit;
- providing a first active read control signal to the first multi-function driver circuit in response to detecting a locked status of the first clock via the common bus;
- and
- transmitting first read data from the first multi-function driver circuit to the common bus in response to the first active read control signal.
Dependencies are inferred from the claim text.