Dot-matrix type display device

A dot-matrix type display device comprising:

• a first transparent substrate and a second substrate which are arranged to be opposite to each other;
• groups of scanning electrodes and groups of signal electrodes provided respectively on surfaces said first and second substrates facing each other, one of said scanning electrodes are one of said signal electrodes intersecting each other to define a display portion, each of said signal electrodes being formed independently of other signal electrodes for each display portion, and said groups of signal electrodes being provided for at least three signal systems;
• a material which is sandwiched between one of said scanning electrodes and one of said signal electrodes, the light transmitting quantity of said material being changed by an electric field applied between said one scanning electrode and said one signal electrode;
• a driving unit for driving said groups of signal electrodes of at least three signal systems;
• outside leads from said respective signal electrodes being arranged to pass through said second substrate, to be led out to a back surface of said second substrate, and being connected to said driving unit mounted on said back surface of said second substrate.