Digitizer having improved signal to noise characteristics

• US 5,627,347 A
• Filed: 04/14/1994
• Issued: 05/06/1997
• Est. Priority Date: 04/20/1993
• Status: Expired due to Term

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Devices Co., Ltd. (Samsung SDI Company Limited)
• Inventors: Kwon, Ki-Duck
• Primary Examiner(s): Chin, Wellington
• Assistant Examiner(s): Shankar, Vijay
• Application Number:
  US08/227,630
• Time in Patent Office: 1,118 Days
• Field of Search: 178/18, 178/19, 178/20, 345/173, 345/179
• US Class Current: 178/18.05
• CPC Class Codes: G06F 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally

Abstract

A digitizer includes a flat panel medium with which a stylus contacts for information input, an outputting device for visualizing and outputting information according to the information input by the stylus, and a resistor installed between the outputting device and the flat panel medium in a predetermined pattern, wherein a flat panel glass substrate having a predetermined thickness is laminated on the outputting. The resistor has a predetermined conductivity and is laminated on the glass substrate in a predetermined pattern, and a thin film dielectric layer is laminated on the patternized resistor.

Claims

1. A digitizer comprising:

a non-conductive flat panel glass substrate having a predetermined thickness;

a resistor disposed on said non-conductive flat panel glass substrate, said resistor being laminated on said non-conductive flat panel glass substrate in a predetermined pattern and having a predetermined conductivity;

a thin film dielectric layer laminated on said resistor;

said thin film dielectric layer including an electrostatic capacitance and a signal-to-noise ratio functionally related to the electrostatic capacitance; and

outputting means for visualizing and outputting information, said non-conductive flat panel glass substrate being laminated on said outputting means.

2. The digitizer as claimed in claim 1, wherein said thin film dielectric layer is formed in a thickness of about 1-20 μ

m.

3. A digitizer comprising:

a display;

a non-conductive flat panel glass substrate having a predetermined thickness, said non-conductive flat panel glass substrate being laminated on said display;

a resistor laminated on said non-conductive flat panel glass substrate in a predetermined pattern and having a predetermined conductivity; and

a thin film dielectric layer laminated on said resistor;

said thin film dielectric layer exhibiting an electrostatic capacitance when contacted with an input device to increase a signal-to-noise ratio of said thin film dielectric layer.

4. The digitizer as claimed in claim 3, wherein said thin film dielectric layer is formed to a thickness of about 1-20 μ

m.