Abstract: A display driver is provided which is suitable for driving dynamically a cholesteric liquid crystal display panel of a passive matrix drive type. The driver comprises a shift register for shifting a row data or column data inputted to the driver, a data latch circuit for latching the row data or column data from the shift register, and a drive voltage select/output circuit for selecting at least one of a plurality of voltage supplies and outputting a row drive voltage or column drive voltage to form an alternated drive voltage which activates picture elements of the liquid crystal panel.

Abstract: A wavelength selecting module includes a first collimator for collimating diverging light to generate a collimated light beam and a liquid crystal cell having a predetermined helical direction. The liquid crystal cell separates a light signal having a specific wavelength among a plurality of light signals of the collimated light beam into a left circularly polarized light and a right circularly polarized light, reflects one of the left and right circularly polarized light signals that has a same optical rotatory direction as the predetermined helical direction toward the first collimator in a first state. The liquid crystal cell passes the plurality of light signals of the collimated light beam in a second state. The liquid crystal cell changes between the first state and the second state in accordance with a change in a voltage applied thereto, thereby switching between selection and non-selection of light having the specific wavelength.

Abstract: The present invention provides an inexpensive stacked type reflection liquid crystal display, which can be obtained by stacking two liquid crystal display panels, and a method for producing the same, wherein a two-layered type reflection liquid crystal display is produced, having a blue display panel 10 and a yellow display panel 20 stacked therein, which is provided with segment electrodes 5a and 5a′, common electrodes 5b and 5b′, and glass substrates 1, 2, 1′ and 2′ in a state where two liquid crystal layers 3 and 3′, the selected and reflection wavelengths of which are mutually different from each other, are placed therebetween. The fluctuation characteristics of the reflectivity with respect to drive voltages of two liquid crystal layers 3 and 3′ are adjusted so that these characteristics are made coincident with each other.

Abstract: A wavelength selecting module includes a first collimator for collimating diverging light to generate a collimated light beam and a liquid crystal cell having a predetermined helical direction. The liquid crystal cell separates a light signal having a specific wavelength among a plurality of light signals of the collimated light beam into a left circularly polarized light and a right circularly polarized liqht, reflects one of the left and right circularly polarized light signals that has a same optical rotatory direction as the predetermined helical direction toward the first collimator in a first state. The liquid crystal cell passes the plurality of light signals of the collimated light beam in a second state. The liquid crystal cell changes between the first state and the second state in accordance with a change in a voltage applied thereto, thereby switching between selection and non-selection of light having the specific wavelength.

Abstract: A display driver is provided which is suitable for driving dynamically a cholesteric liquid crystal display panel of a passive matrix drive type. The driver comprises a shift register for shifting a row data or column data inputted to the driver, a data latch circuit for latching the row data or column data from the shift register, and a drive voltage select/output circuit for selecting at least one of a plurality of voltage supplies and outputting a row drive voltage or column drive voltage to form an alternated drive voltage which activates picture elements of the liquid crystal panel.

Abstract: The invention provides a liquid crystal display having high reliability, which is excellent in terms of optical characteristics, heat resistance, and shock resistance, wherein a liquid crystal display consisting of a cholesteric liquid crystal, a chiral nematic liquid crystal or a liquid crystal 1 layer, being a combination thereof, which is roughly pillar-like and polygonal in section or has a roughly pillar-like form enclosed by a closed curve, and divided by said polymer network into areas whose minimum diameter measured by vernier calipers is 5 &mgr;m and whose maximum diameter measured by vernier calipers is 100 &mgr;m, is obtained by polymer networks 4 formed by polymerization of monomer, so that sufficient reflection can be obtained from the liquid crystal 1 without being optical scattering.

Abstract: The present invention provides an inexpensive stacked type reflection liquid crystal display, which can be obtained by stacking two liquid crystal display panels, and a method for producing the same, wherein a two-layered type reflection liquid crystal display is produced, having a blue display panel 10 and a yellow display panel 20 stacked therein, which is provided with segment electrodes 5a and 5a′, common electrodes 5b and 5b′, and glass substrates 1, 2, 1′ and 2′ in a state where two liquid crystal layers 3 and 3′, the selected and reflection wavelengths of which are mutually different from each other, are placed therebetween. The fluctuation characteristics of the reflectivity with respect to drive voltages of two liquid crystal layers 3 and 3′ are adjusted so that these characteristics are made coincident with each other.

Abstract: The visibility of a reflective display panel is improved by providing reflection enhanced films 4 and 5 on the glass surfaces of the reflective display panel, a bright reflective liquid crystal display unit having less reflected images and high contrast can be obtained.

Abstract: The optical parts according to the invention have a feature of having smoothly coated surfaces for incident and emergent lights covered thereover with a light transmitting solid coating layer, and can be manufactured by a simplified process at least without needing polishing, together with the advantages of being weatherproof in atmosphere of high temperature and high humidity and antiozonant.