The present invention provides a liquid crystal display device having a liquid
crystal display portion, a gate driver circuit, a source driver circuit, and a
power supply circuit, where the liquid crystal display portion includes unit pixels
with pixel switching elements and pixel electrodes arranged in a matrix. The pixel
switching elements are thin film transistors that are made of polycrystalline silicon
semiconductor formed on an insulating substrate. The power supply circuit is a
charge pump-type power supply circuit, is made of a polycrystalline silicon semiconductor,
and is a built-in circuit integrally formed on an insulating substrate. With such
a configuration, a liquid crystal display device that greatly reduces power consumption
is realized.
