Method and structure for broadening cholesteric liquid crystals spectrum

A method for broadening a spectrum of cholesteric liquid crystal spectrum, comprising:

• forming a electrode structure on a first substrate;
• merging the first substrate and a second substrate and sealing the two substrates by a sealant;
• filling cholesteric liquid crystals between the first substrate and the second substrate, wherein the electrode structure is located between the first substrate and the cholesteric liquid crystals;
• and
• applying a voltage to the electrode structure to produce a fringe field, so as to change thread pitches of the cholesteric liquid crystals.

A LCD display device of cholesteric liquid crystal, comprising:

• a first substrate;
• a second substrate;
• cholesteristic liquid crystal located between the first substrate and the second substrate;
• and
• an electrode structure located between the cholesteric liquid crystal and the first substrate, and having a capability of producing a fringe field.