The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 02, 2002
Filed:
Nov. 15, 2000
Hirofumi Kubota, Osaka, JP;
Shinya Kosako, Kadoma, JP;
Kenji Nakao, Osaka, JP;
Noriko Naito, Ishikawa-gun, JP;
Tsuyoshi Uemura, Kadoma, JP;
Masao Yamamoto, Kishiwada, JP;
Abstract
A polymer dispersion type liquid crystal display element having a polymer dispersion type liquid crystal sandwiched between a pair of substrates, each having an inside electrode, is disclosed. The liquid crystal has liquid crystal droplets dispersed and held in either a polymer compound-containing continuous phase matrix or a three dimensional network of such a matrix. In one embodiment, the capacitance hysteresis, defined as Chys=(C −C )/C , does not exceed 1.5%. C is the capacitance for an applied voltage that is in the process of rising a voltage-capacitance characteristic; C is the capacitance of an applied voltage in the process of dropping; and C is the capacitance of a maximum applied voltage. In another embodiment, the Chys value does not exceed 0.6% when the optical hysteresis Thys is (P −P )/P where P is the intensity of transmitted light of an applied rising voltage V, P is the intensity of transmitted light of an applied dropping voltage, and P is the intensity of transmitted light of a maximum applied voltage.