Ramp signal generating circuit and signal generator, array substrate and display apparatus

摘要

A ramp signal generating circuit and ramp signal generator, an array substrate and a display apparatus. The ramp signal generating circuit comprises a first shift register (11), a second shift register possessing a bidirectional scanning function (12), a voltage decreasing unit (13) and a sampling unit (14); the voltage decreasing unit (13) is connected to a power supply input terminal and a ground terminal and is configured to continuously decrease a voltage inputted from the power supply input terminal stage by stage; the first shift register (11) is connected to the voltage decreasing unit (13) and is configured to control the voltage decreasing unit (13) to output voltages which are decreased continuously stage by stage; the sampling unit (14) has an output terminal and is connected to the voltage decreasing unit (13); the second shift register (12) is connected to the sampling unit (14) and is configured to control, through bidirectional scanning, the sampling unit (13) to sample and output the voltages which are decreased continuously stage by stage by the voltage decreasing unit (13). Such ramp signal generating circuit is capable of reducing area of the ramp signal generating circuit and improving linearity of ramp signal.

主权项

1. A ramp signal generating circuit comprising:
a first shift register, a second shift register possessing a bidirectional scanning function, a voltage decreasing unit and a sampling unit; the voltage decreasing unit is connected to a power supply input terminal and a ground terminal and is configured to continuously decrease a voltage inputted from the power supply input terminal stage by stage; the first shift register is connected to the voltage decreasing unit and is configured to control the voltage decreasing unit to output voltages which are decreased continuously stage by stage; the sampling unit has an output terminal and is connected to the voltage decreasing unit; the second shift register is connected to the sampling unit and is configured to control, through bidirectional scanning, the sampling unit to sample and output the voltages which are decreased continuously stage by stage by the voltage decreasing unit.