Cathode-ray tube
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorYasunori Miura
Life of this patent
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Abstract
A surface treatment film composed of a conductive film with a surface resistance of 1×103Ω/□ or more and an antireflection film is provided on the surface of a glass panel. A ground electrode is provided on the surface treatment film so as to be electrically connected with the conductive film. The ground electrode is grounded in a circuit manner. An area of the surface treatment film covered with the ground electrode is set at 500 mm2 or more. Thus, even in the case where the conductive film has a resistance of 1×103Ω/□ or more, an effect of suppressing a leakage electric field to 1.0 V/m or less, which satisfies the TCO guideline, can be realized.
Claims3
A cathode-ray tube, comprising:
- a glass panel having an outer edge and an effective screen area;
- a reinforcing band supporting the outer edge of the glass panel;
- a surface treatment film formed on the glass panel, the surface treatment film including an antireflection film layered on a conductive film having a surface resistance of 1×103Ω/or more;
- a ground electrode formed on the surface treatment film, the ground electrode being electrically connected with the conductive film and having a surface area of 500 mm2 or more, the ground electrode having a band shape and positioned so as to be substantially parallel to the outer edge of the glass panel on a side of the panel where at least an anode terminal is provided, outside the effective screen area of the glass panel;
- and
- a conductive tape attached to the ground electrode, the conductive tape being a different member from the ground electrode and electrically connecting the ground electrode to the reinforcing band.
Dependencies are inferred from the claim text.