Liquid crystal cells – elements and systems – Particular structure – Particular illumination
Reexamination Certificate
2003-09-26
2008-11-04
Lee, Jong-Suk (James) (Department: 2885)
Liquid crystal cells, elements and systems
Particular structure
Particular illumination
C362S297000, C362S346000, C362S561000, C359S883000
Reexamination Certificate
active
07446829
ABSTRACT:
To compensate for uneven brightness in the longitudinal direction of fluorescent lamps of a backlight unit and achieve a display screen with an even brightness, a reflection unit of the backlight unit, the fluorescent tube surface of the fluorescent lamps or a diffusion unit is used to either reduce the reflectance, transmittance, or radiation brightness of the high-voltage side of the fluorescent lamps or increase the reflectance, transmittance, or radiation brightness of the low-voltage side thereof so as to compensate for uneven brightness of the illumination light and thereby ensure an even brightness. For example, dot pattern regions D1, D2and D3, i.e., the regions whose density increases in stages, are imparted to the portion of a reflection layer13of the backlight unit with a relatively high brightness. As for the display device, on the other hand, the display image data supplied to a liquid crystal panel or the aperture ratio of the liquid crystal panel is controlled, for example, to compensate for uneven brightness in the longitudinal direction of the fluorescent lamps and ensure an even brightness.
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Idei Kazuya
Inoue Yutaka
Ohtsuka Kohji
Shimizu Masaki
Yoshii Takashi
Birch & Stewart Kolasch & Birch, LLP
Lee Jong-Suk (James)
Lovell Leah S
Sharp Kabushiki Kaisha
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