Back to results
US 6,750,854 B1Granted
Image displaying apparatus
AssigneeCanon Kabushiki Kaisha
InventorTomoya Onishi
Life of this patent
Estimating the term…
Abstract
An image displaying apparatus includes a transparent film adhered to an outer surface of a face plate, and a transparent conductive film formed on an outer surface of the transparent film. When a potential difference is formed between the transparent conductive film and an inner surface of the face plate, a reduction in voltage of the transparent film becomes greater than a reduction in voltage of the face plate.
Claims13
An image displaying apparatus, comprising:
- a face plate,
- a transparent film adhered to an outer surface of said face plate;
- a transparent conductive film formed on an outer surface of said transparent film;
- an electrode provided at an inner surface of said face plate;
- a first voltage power supply supplying voltage to said electrode;
- and
- a second voltage power supply supplying voltage to said transparent conductive film, and wherein
- said transparent film and said face plate are formed from materials generating voltage drops when said first and second voltage power supplies supply different potentials respectively to said electrode and said transparent conductive film, with the voltage drop across said transparent film being larger than the voltage drop across said face plate.
5 more elements
An image displaying apparatus, comprising:
- a face plate,
- a transparent film adhered to an outer surface of said face plate;
- a transparent conductive film formed on an outer surface of said transparent film,
- an electrode provided at an inner surface of said face plate,
- a first voltage power supply supplying voltage to said electrode;
- and
- a second voltage power supply supplying voltage to said transparent conductive film, and
- meeting a relationship of 0.86A−Vgsat/Rg+2.38X10−4·Q·B≦10−6,
- wherein
- Va is a potential applied by said first voltage power supply to said electrode,
- Vb is a potential applied by said second voltage power supply to said transparent conductive film and is nearer to ground potential rather than Va,
- σg is volume resistivity of said face plate,
- εg is specific inductive capacity of said face plate,
- tg is thickness of said face plate,
- σp is volume resistivity of said transparent film,
- εp is specific inductive capacity of said transparent film,
- tp is a thickness of said transparent film,
- εO is inductive capacity in vacuum,
- A is an endurance time of image displaying,
- B is number of starting applications of potential Va during the endurance time A,
- Rg=σg·tg
- Rp=σp·tp,
- Vgsat={Rg/(Rg+Rp)}·(Va−Vb),
- Q={(Va−Vb)·τ/(Rg+Rp)}·{5+(0.99·Rp)/Rg},
- τ={Rg·Rp(Cg+Cp)}/(Rg+Rp),
- Cg=(∈g·∈o)/102·tg, and
- Cp=(∈g·∈o)/102·tp.
24 more elements
An image displaying apparatus, comprising:
- a face plate;
- a transparent film adhered to an outer surface of said face plate;
- a transparent conductive film formed on an outer surface of said transparent film;
- an electrode and a phosphor provided at an inner surface of said face plate;
- a first voltage power supply supplying voltage to said electrode;
- and
- a second voltage power supply supplying voltage to said transparent conductive film, and wherein
- said transparent film and said face plate are formed from materials generating voltage drops when said first and second voltage power supplies supply different potentials respectively to said electrode and said transparent conductive film, with the voltage drop across said transparent film being larger than the voltage drop across said face plate.
5 more elements
An image displaying apparatus, comprising:
- a face plate;
- a transparent film adhered to an outer surface of said face plate;
- a transparent conductive film formed on an outer surface of said transparent film;
- an electrode provided at an inner surface of said face plate;
- and
- a first voltage power supply supplying voltage to said electrode, said transparent conductive film being connected to a ground potential, and wherein
- said transparent film and said face plate are formed from materials generating voltage drops when said first voltage power supply supplies a voltage difference between said electrode and said transparent conductive film, with the voltage drop across said transparent film being larger than the voltage drop across said face plate.
4 more elements
An image displaying apparatus, comprising:
- a face plate;
- a transparent film adhered to an outer surface of said face plate;
- a transparent conductive film formed on an outer surface of said transparent film;
- an electrode and a phosphor provided at an inner surface of said face plate;
- and
- a first voltage power supply supplying voltage to said electrode, said transparent conductive film being connected to a ground potential, and wherein
- said transparent film and said face plate are formed from materials generating voltage drops when said first voltage power supply supplies a voltage difference between said electrode and said transparent conductive film, with the voltage drop across said transparent film being larger than the voltage drop across said face plate.
4 more elements
Dependencies are inferred from the claim text.