Display driver IC
AssigneeRohm Co., Ltd.
InventorsYasuhito Sugimoto, Sukenori Ito, Hiromitsu Nakaoka
Life of this patent
Estimating the term…
Abstract
A display driver IC (200) comprises: a digital circuit including a logic circuit (2); an output unit (11) for outputting, to the outside, a drive control signal with a level corresponding to the output from the logic circuit; and at least one of a first decision unit (21) for determining whether or not an abnormality is present in the register value in a register in the digital circuit and a second decision unit (22) for determining whether or not the level of the drive control signal is the level corresponding to the output from the logic circuit.
Claims15
A display driver IC comprising:
- a digital circuit including a logic circuit;
- an output unit configured to output to outside a drive control signal having a level commensurate with an output of the logic circuit;
- a first decision unit configured to check whether or not there is an abnormality in a register value of a register in the digital circuit;
- a ground potential terminal connected to a ground potential;
- and
- a ground potential conductor pattern connected to the ground potential terminal,
- wherein the first decision unit includes at least one data flip-flop, and is configured to determine that there is an abnormality in the register value of the register in the digital circuit when a value written to the data flip-flop does not match a value read from the data flip-flop, and
- the data flip-flop is provided near a place with a highest impedance with respect to the ground potential terminal within the ground potential conductor pattern.
A display driver IC comprising:
- a digital circuit including a logic circuit;
- an output unit configured to output to outside a drive control signal having a level commensurate with an output of the logic circuit;
- a first decision unit configured to check whether or not there is an abnormality in a register value of a register in the digital circuit;
- a supply voltage terminal to which a supply voltage is applied;
- and
- a supply voltage conductor pattern connected to the supply voltage terminal,
- wherein
- the first decision unit includes at least one data flip-flop, and is configured to determine that there is an abnormality in the register value of the register in the digital circuit when a value written to the data flip-flop does not match a value read from the data flip-flop, and
- the data flip-flop is provided near a place with a highest impedance with respect to the supply voltage terminal within the supply voltage conductor pattern.
Dependencies are inferred from the claim text.