Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – Plural light emitting devices
Reexamination Certificate
1999-05-14
2001-12-04
Tran, Minh Loan (Department: 2826)
Active solid-state devices (e.g., transistors, solid-state diode
Incoherent light emitter structure
Plural light emitting devices
C257S098000, C257S099000, C257S103000, C313S506000
Reexamination Certificate
active
06326644
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates generally to a contact light emitting device, a method of manufacturing thereof and a contact input apparatus using thereof and more particularly, to a contact light emitting device, the method of manufacturing thereof and the contact input apparatus using thereof, capable of emitting a photo image of surface pattern of a contacted object upon contacting the object which acts as a ground and converting and outputting the emitted photo image to image signal such as an electrical image.
As a prior art, there is “an input apparatus using a fluorescent material” filed by the present application on May 19, 1997 as the Korea Patent Application No. 19282.
The input apparatus disclosed in the above application includes a metal electrode, a PN junction diode, a transparent conductive layer, an adhesive layer and a fluorescent film on a substrate formed with glass materials. The fluorescent film is formed with luminance material and is inputted with a various image pattern such as letters, figures, straight line, curve, etc., on the fluorescent film by way of pen or the like.
The fluorescent film is emitted to an image pattern inputted by way of a pen and the emitted light is converted from photo signal to the electrical signal through the PN junction diode. That is, the input signal is converted and outputted with the electrical signal after converting the input image pattern to photo signal.
However, it is possible to input surface pattern by way of the input apparatus. In other words, the input apparatus disclosed in the above application can input information by way of pushing and moving the pen to the flashing body film but cannot input information just by pushing the film. The input apparatus disclosed by the application thus cannot be used for recognition of fingerprints.
Accordingly, the present invention is disclosed to solve the aforementioned problem and it is an object of the present invention to provide a contact light emitting device by which an image of contacted area as well as an exact rough surface of contacted area can be lively expressed and generated in a light emitting image just by touch or contact to the light emitting apparatus.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a contact light emitting device capable of emitting photo image of surface pattern of a contacted object upon contacting the object which acts as a ground and a manufacturing method thereof.
It is other object of the present invention to provide a contact input apparatus capable of converting and outputting the photo images to the image signals such as electrical images.
Additional objects and advantages of the invention will set forth in part in the description which follows and in part will be obvious from the description, or may be learned by practice of the invention. The objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.
To achieve the objects and in accordance with the purpose of the invention, as embodied and broadly described herein, the contact light emitting device of this invention comprises a transparent electrode layer connected to one of alternating current power source terminals, luminescence layer for generating photo image such as surface pattern of contact surface by the electric field and formed between the transparent electrode layer and a contacted object which acts as a ground, a transparent insulating layer for penetrating the photo image and formed under the transparent electrode.
According to the present invention, a manufacturing method of a contact light emitting device of this invention comprising the steps of: forming a transparent insulating layer by using transparent insulating materials, forming a transparent electrode layer by using a transparent conductive material above the transparent insulating layer, and mixing 25-35 wt. % dielectric polymer paste, 25-29 wt. % retarder and 30-50 wt. % luminance powder doped by dopant above the transparent electrode layer and forming a luminescence layer by using the mixed compound.
A contact input apparatus of this invention comprises a transparent electrode layer connected to one of alternating current power source terminals, luminescence layer for generating photo image such as surface pattern of contact surface by the electric field and formed between the transparent electrode layer and a contacted object which acts as a ground, a transparent insulating layer for penetrating the photo image and formed under the transparent electrode, and a light receiving means for inverting an photo image occurred from the luminescence layer to an electrical signal received through the transparent electrode layer and the transparent insulating layer by attaching the transparent insulating adhesive material on a lower surface of the transparent insulating layer.
REFERENCES:
patent: 5105238 (1992-04-01), Nikaido et al.
patent: 1997-019282 (1998-12-01), None
Lee Ju Hyun
Ryu Young Kee
Vlaskin Vladimir
Fleshner & Kim LLP
Mirae Corporation
Tran Minh Loan
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