Digital oscilloscope using color plane display device and data display method therefore

A digital oscilloscope wherein a signal to be observed is sampled to produce a sampled signal, said sampled signal is converted into a corresponding digital signal by an analog-to-digital converter, said digital signal is stored into an acquisition memory as a data signal, said data signal is read from said acquisition memory and stored into a display memory, said data signal stored into said display memory is read at a timing controlled by a display control means, said data signal read from said display memory under the control of said display control means is displayed on a display unit, said digital oscilloscope comprising:

• said display control means, including:
• a color control circuit for generating red, green and blue data signals at respective display timings for red, green and blue dots in accordance with said data signal read from said display memory, and
• a sync signal generating circuit for supplying a timing signal for controlling timings for reading said data signal to said display memory, for supplying a sync signal synchronous with said timing signal to said display unit, and for supplying red, green and blue timing clock signals (RCLK, GCLK, BCLK) for generating said red, green and blue data signals for respective dots of red, green and blue to said color control circuit;
• and
• said display unit being a color dot matrix plane display device formed by a liquid crystal display, said display unit including:
• a phase locked loop circuit, in accordance with said sync signal synchronous with said timing signal, for generating a scan clock signal for determining scanning timings for lighting the respective dots independently as to respective dots of said display unit,
• a dot scanning circuit for generating a dot scanning signal for lighting respective dots of red, green and blue in accordance with said scan clock signal from said phase locked loop circuit and said red, green and blue data signals from said color control circuit, and
• a color liquid crystal display unit for displaying said data signal read from said display memory in accordance with said dot scanning signal from said dot scanning circuit.