Abstract: A liquid crystal display panel (100) and a display apparatus (200). The liquid crystal display panel (100) includes a color filter substrate (1), an array substrate (2), and a sealant (3). An amorphous silicon layer (4) and a first interlayer dielectric (5) are provided between a shading layer (12) and a first substrate (11), a first through groove (12a) is formed in the shading layer (12) and the amorphous silicon layer (4), and a part of the sealant (3) is filled in the first through groove (12a) and is in direct contact with the first interlayer dielectric (5); and/or a planarization layer (22) is wrapped with a second interlayer dielectric (6), such that the planarization layer (22) is respectively separated from the sealant (3) and a second substrate (21), and the second interlayer dielectric (6) is in direct contact with the sealant (3). The phenomenon of film separation in a liquid crystal display panel is effectively alleviated, and the reliability of the liquid crystal display panel is improved.

Abstract: The present technology relates generally to a closed-loop power stage and audio amplifier circuits comprising the same. The present technology further provides a method for controlling an amplifier circuit. The closed-loop power stage is configured to receive a PWM input signal having a first frequency and a first duty cycle, a power supply voltage, and a bias signal related to the power supply voltage, and to output a square-wave signal having a second frequency and a second duty cycle. The closed-loop power stage comprises a feedback loop which is configured to regulate the second duty cycle of the square-wave signal in response to a variation in the power supply voltage. The audio amplifier circuit comprising the closed-loop power stage may have a stable output voltage and thus have good power supply rejection performance.

Abstract: The embodiments of the present invention disclose a high power-supply rejection ratio (PSRR) amplifier circuit. The amplifier circuit comprises a low dropout regulator, a negative charge pump and an amplifier. The output voltages of the negative charge pump and the low dropout regulators don't track the change of input voltage. Therefore the amplifier circuit has high PSRR.

Abstract: The embodiments of the present invention disclose a high power-supply rejection ratio (PSRR) amplifier circuit. The amplifier circuit comprises a low dropout regulator, a negative charge pump and an amplifier. The output voltages of the negative charge pump and the low dropout regulators don't track the change of input voltage. Therefore the amplifier circuit has high PSRR.

Abstract: The embodiments of the present circuit and method disclose an amplification circuit including a voltage regulator, a negative charge pump and an amplifier. The output of the voltage regulator supplies the upper voltage supply of the amplifier and the output of the negative charge pump supplies the lower voltage supply of the amplifier. The voltage regulator and the negative charge pump make the power supply of the amplifier flexible, easy to be fabricated in semiconductor process.

Abstract: The present technology relates generally to a closed-loop power stage and audio amplifier circuits comprising the same. The present technology further provides a method for controlling an amplifier circuit. The closed-loop power stage is configured to receive a PWM input signal having a first frequency and a first duty cycle, a power supply voltage, and a bias signal related to the power supply voltage, and to output a square-wave signal having a second frequency and a second duty cycle. The closed-loop power stage comprises a feedback loop which is configured to regulate the second duty cycle of the square-wave signal in response to a variation in the power supply voltage. The audio amplifier circuit comprising the closed-loop power stage may have a stable output voltage and thus have good power supply rejection performance.