Display device drive unit and driving method of display device

A display device drive unit comprising:

• a boosting circuit for generating a display device driving voltage by boosting an input voltage;
• a driving circuit for driving a display device in accordance with the display device driving voltage that has been provided from the boosting means, or the display driving voltage that has been provided from outside;
• a mode storage section, being rewritable, that stores mode information;
• a controller for rewriting the mode information to a master mode or a slave mode;
• and
• a switch, provided on a feeding path extending from the boosting circuit to the driving circuit, that closes the feeding path when the mode information is set to be in a master mode, and opens the feeding path when the mode information is set to be in a slave mode.

A driving method of a display device comprising the steps of:

• generating a display device driving voltage for driving the display device;
• driving the display device in accordance with the display device driving voltage;
• using the display device drive unit having (i) a plurality of driving voltage output means that are operable in accordance with a master mode for outputting the display device driving voltage to outside and a slave mode for driving the display device based on the display device driving voltage inputted from the outside, (ii) mode storage means, being rewritable, that stores mode information that indicates whether each of the driving voltage output means is set to be in the master mode or the slave mode;
• setting all the driving voltage output means in the slave mode in accordance with the mode information stored in the mode storage means so as to provide the display device driving voltage from the external power source to the driving voltage output means.

A driving method of a display device comprising the steps of:

• generating a display device driving voltage for driving the display device;
• driving the display device in accordance with the display device driving voltage;
• using the display device drive unit having (i) a plurality of driving voltage output means that are operable in accordance with a master mode for outputting the display device driving voltage to outside and a slave mode for driving the display device based on the display device driving voltage inputted from the outside, (ii) mode storage means, being rewritable, that stores mode information that indicates whether each of the driving voltage output means is set to be in the master mode or the slave mode;
• setting at least any one of the driving voltage output means in the master mode in accordance with the mode information stored in the mode storage means;
• setting other driving voltage output means in the slave mode so as to provide the display device driving voltage from the driving voltage output means in the master mode to the driving voltage output means in the slave mode.

A driving method of a display device comprising the steps of:

• generating a display device driving voltage for driving the display device;
• driving the display device in accordance with the display device driving voltage;
• using the display device drive unit having (i) a plurality of driving voltage output means that are operable in accordance with a master mode for outputting the display device driving voltage to outside and a slave mode for driving the display device based on the display device driving voltage inputted from the outside, (ii) mode storage means, being rewritable, that stores mode information that indicates whether each of the driving voltage output means is set to be in the master mode or the slave mode;
• and
• causing the driving voltage output means to switch between the master mode and the slave mode by rewriting the mode information stored in the mode storage means.

A driving method of a display device comprising the steps of:

• generating a display device driving voltage for driving the display device;
• driving the display device in accordance with the display device driving voltage;
• using the display device drive unit having (i) a plurality of driving voltage output means that are operable in accordance with a master mode for outputting the display device driving voltage to outside and a slave mode for driving the display device based on the display device driving voltage inputted from the outside, (ii) mode storage means, being rewritable, that stores mode information that indicates whether the driving voltage output means is set to be in the master mode or the slave mode;
• setting at least any one of the driving voltage output means in the slave mode in accordance with the mode information stored in the mode storage means so as to provide the display device driving voltage from the driving voltage output means in the master mode or the external power source to the driving voltage output means in the slave mode.