US Patent 7088315 Plasma display device having an improved contrast radio

Patent 7088315 was granted and assigned to Hitachi on August, 2006 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Hitachi

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

70883150

Date of Patent

August 8, 2006

Patent Application Number

106467060

Date Filed

August 25, 2003

Patent Primary Examiner

‌

Sumati Lefkowitz

Patent abstract

A plasma display device is realized which has a high set-luminous-efficacy (i.e. provides a high-brightness display image at a low power consumption) and a high light-room contrast. The luminous efficacy hs and the display discharge voltage Vs are increased by increasing the product pd in discharge, or increasing the Xe proportion aXe of the discharge. As a result the display-discharge region area ratio Ad and the display region reflectance β can be reduced by reducing the display-electrode area Sse approximately in inverse proportion to Vs2, and thereby the set-luminous efficacy hs and the set luminance Bpons and the light-room contrast Cb are increased.