Display apparatus

A display apparatus, comprising:

• a panel including a plurality of gate lines extending along rows, a plurality of signal lines extending along columns, a plurality of pixels arranged in a matrix at intersecting points at which said gate lines and said signal lines intersect with each other, and an image line for supplying an image signal;
• a vertical driving circuit disposed in said panel and connected to said gate lines for successively selecting the rows of said pixels;
• a plurality of sampling switches disposed in said panel for connecting said signal lines to said image line;
• a horizontal driving circuit operable in response to a clock signal inputted from the outside for successively generating sampling pulses to successively drive said sampling switches so that the image signal is successively written into the pixels of the selected row;
• and
• a feedback circuit for detecting a delay amount of each of the sampling pulses, which varies with time, and producing a feedback pulse on which the delay amount is reflected and then feeding back the feedback pulse from the inside to the outside of said panel;
• the phase of the clock signal to be inputted to said panel being adjustable outside said panel so as to compensate for the delay amount of the sampling pulse based on the feedback pulse;
• said horizontal driving circuit including a shift register for receiving a start pulse and the clock signal from the outside and performing a shifting operation of the start pulse to successively output shift pulses from individual shift stages and an extraction switch set for extracting the clock signal in response to the shift pulses successively outputted from said shift register to successively produce the sampling pulses;
• said shift register being capable of changing over transfer of the start pulse between forward transfer wherein the start pulse is transferred in a forward direction and reverse transfer wherein the start pulse is transferred in a reverse direction in response to a changeover signal supplied from the outside;
• said feedback circuit having a circuit configuration wherein overlapping elements used for both of the forward transfer and the reverse transfer are formed as common components used commonly.