Invention Grant
US07630037B2 Double-sided backlight unit with different area first and second LCD panels and having a first light-diffusing sheet between a light guide plate and light-absorbing sheet and second light-diffusing sheet between the light guide plate and the second LCD panel 有权
具有不同区域的第一和第二LCD面板的双面背光单元,并且在导光板和光吸收片之间具有第一光扩散片,在导光板和第二LCD面板之间具有第二光扩散片

  • Patent Title: Double-sided backlight unit with different area first and second LCD panels and having a first light-diffusing sheet between a light guide plate and light-absorbing sheet and second light-diffusing sheet between the light guide plate and the second LCD panel
  • Patent Title (中): 具有不同区域的第一和第二LCD面板的双面背光单元,并且在导光板和光吸收片之间具有第一光扩散片,在导光板和第二LCD面板之间具有第二光扩散片
  • Application No.: US11435531
    Application Date: 2006-05-17
  • Publication No.: US07630037B2
    Publication Date: 2009-12-08
  • Inventor: Takashi Shimura
  • Applicant: Takashi Shimura
  • Applicant Address: JP Fujiyoshida-shi, Yamanashi-ken
  • Assignee: Citizen Electronics Co., Ltd.
  • Current Assignee: Citizen Electronics Co., Ltd.
  • Current Assignee Address: JP Fujiyoshida-shi, Yamanashi-ken
  • Agency: Brinks Hofer Gilson & Lione
  • Priority: JP2005-148822 20050520
  • Main IPC: G02F1/1335
  • IPC: G02F1/1335
Double-sided backlight unit with different area first and second LCD panels and having a first light-diffusing sheet between a light guide plate and light-absorbing sheet and second light-diffusing sheet between the light guide plate and the second LCD panel
Abstract:
A single light guide plate illuminates both first and second liquid crystal display panels opposed to each other, the second liquid crystal display panel having a larger display area than that of the first liquid crystal display panel. A light-absorbing sheet is provided between the light guide plate and the first liquid crystal display panel to absorb light from the light guide plate and has a light-transmitting part aligned with the first liquid crystal display panel in a direction from the light guide plate toward the first liquid crystal display panel to transmit light from the light guide plate to the first liquid crystal display panel. A reflective polarizing sheet is provided between the second liquid crystal display panel and the light guide plate. The light-absorbing sheet eliminates brightness unevenness on the second liquid crystal display panel, which would otherwise occur due to the influence of the first liquid crystal display panel, and the reflective polarizing sheet allows effective utilization of light from the light guide plate.
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