Amplifier, liquid crystal displaying driving circuit and liquid crystal display apparatus

A liquid crystal displaying driving circuit for outputting a driving signal for driving pixels provided in a liquid crystal displaying section operative to display an image, said liquid crystal displaying driving circuit comprising:

• a digital-to-analog conversion circuit configured to generate a driving analog signal in response to an input video signal;
• and
• an amplifier including:
• a voltage follower circuit that includes a first input terminal, a second input terminal, and an output terminal which is connected to said second input terminal, wherein said voltage follower circuit is configured to:
• amplify said driving analog signal input to said first input terminal, and
• output said amplified driving analog signal from said output terminal,
• a first current source configured to supply a first current to said voltage follower circuit, and
• a second current source configured to supply a second current to said voltage follower circuit,
• wherein said second current source comprises a first PMOS transistor and a second PMOS transistor,
• wherein a drain terminal of said first PMOS transistor and a drain terminal of said second PMOS transistor are directly connected to said voltage follower circuit,
• wherein a gate terminal of said first PMOS transistor is directly connected to said first input terminal,
• wherein said driving analog signal is input to said second current source, and
• wherein said second current source is configured to supply said second current in an event a difference between an input voltage corresponding to said driving analog signal and an output voltage corresponding to said amplified driving analog signal is larger than a predetermined voltage.

A liquid crystal display apparatus, comprising:

• a driving circuit including:
• a decoder circuit configured to decode an input signal to produce an input video signal,
• a digital-to-analog conversion circuit configured to generate a driving analog signal in response to said input video signal,
• an amplification circuit including a plurality of amplifiers each including:
• a voltage follower circuit that includes a first input terminal, a second input terminal, and an output terminal which is connected to said second input terminal, wherein said voltage follower circuit is configured to:
• amplify said driving analog signal input to said first input terminal, and
• output said amplified driving analog signal from said output terminal,
• a first current source configured to supply a first current to said voltage follower circuit, and
• a second current source configured to supply a second current to said voltage follower circuit,
• wherein said second current source comprises a first PMOS transistor and a second PMOS transistor,
• wherein a drain terminal of said first PMOS transistor and a drain terminal of said second PMOS transistor are directly connected to said voltage follower circuit,
• wherein a gate terminal of said first PMOS transistor is directly connected to said first input terminal,
• wherein said driving analog signal is input to said second current source, and
• wherein said second current source is configured to supply said second current in an event a difference between an input voltage corresponding to said driving analog signal and an output voltage corresponding to said amplified driving analog signal is larger than a predetermined voltage;
• and
• a liquid crystal displaying section including a plurality of pixels driven by said driving analog signal and configured to display an image.