Image display system

• US 7,486,334 B2
• Filed: 07/23/2004
• Issued: 02/03/2009
• Est. Priority Date: 10/24/1994
• Status: Expired due to Fees

• Current Assignee: Hitachi Maxell Limited (Maxell, Ltd.)
• Original Assignee: Hitachi, Ltd.
• Inventors: Sano, Tsuyoshi, Imai, Yasuhiro, Inoue, Fumio, Hirose, Masatoshi, Kitou, Kouji, Someya, Ryuuichi, Nagabayashi, Tamotsu, Masuda, Kouzou, Kawasaki, Jiro, Tsuruga, Sadao, Arai, Ikuya
• Primary Examiner(s): DIEP, NHON THANH
• Application Number:
  US10/897,204
• Publication Number:
  US 20050001932A1
• Time in Patent Office: 1,656 Days
• Field of Search: None
• US Class Current: 348/563
• CPC Class Codes: H04N 21/4113 PC
• CPC Class Codes: H04N 21/4305 Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets arrangements for synchronising receiver with transmitter by comparing receiver clock with transmitter clock H04L7/0012; arrangements for synchronising receiver with transmitter wherein the receiver takes measures against momentary loss of synchronisation H04L7/0083
• CPC Class Codes: H04N 21/4316 for displaying supplemental content in a region of the screen, e.g. an advertisement in a separate window
• CPC Class Codes: H04N 21/4318 by altering the content in the rendering process, e.g. blanking, blurring or masking an image region image enhancement or restoration in general G06T5/00
• CPC Class Codes: H04N 21/440218 by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4 conversion of standards in analogue television systems H04N7/01
• CPC Class Codes: H04N 21/47 End-user applications
• CPC Class Codes: H04N 5/126 whereby the synchronisation signal indirectly commands a frequency generator
• CPC Class Codes: H04N 5/45 Picture in picture , e.g. displaying simultaneously another television channel in a region of the screen
• CPC Class Codes: H04N 5/52 Automatic gain control
• CPC Class Codes: H04N 5/57 Control of contrast or brightness
• CPC Class Codes: H04N 7/012 Conversion between an interlaced and a progressive signal for graphics images G09G2310/0229

Abstract

An image display system includes a display device, an input section to which video signals of an interlace scanning system are inputted, a signal converter section which increases horizontal scanning lines of the inputted video signals in number by a factor of at least two, and which generates first and second fields, each of the fields including effective scanning lines used for displaying and ineffective scanning lines not used for displaying, with the effective and ineffective scanning lines being arranged alternately in each of the fields, and a display control section which controls the display device to display the first and second fields alternately. The display control section controls the display device such that positions of the effective scanning lines of the first fields correspond with those of the ineffective scanning lines of the second fields, and vice versa.

Claims

1. An image display system, comprising:

a display device;

an input section to which video signals of an interlace scanning system are inputted;

a signal converter section which increases horizontal scanning lines of said video signals inputted to said input section in number by a factor of at least two, and which generates first fields and second fields,

each of said first fields and said second fields including effective scanning lines used for displaying said video signals and ineffective scanning lines not used for displaying said video signals, with said effective and ineffective scanning lines being arranged alternately in each of said first and second fields; and

a display control section which controls said display device such that said display device displays said first and second fields generated by said signal converter section, alternately in terms of time,

wherein said display control section controls said display device such that positions of said effective scanning lines of said first fields correspond with those of said ineffective scanning lines of said second fields, and positions of said ineffective scanning lines of said first fields correspond with those of said effective scanning lines of said second fields.

2. An image display system according to claim 1, wherein said display device is a plasma display device.

3. An image display system comprising:

a display device;

an input section to which video signals of an interlace scanning system are inputted;

a signal converter section which increases horizontal scanning lines of said video signals inputted to said input section in number by a factor of at least two, and which generates first fields and second fields,

each of said first fields including odd-numbered lines serving as effective scanning lines used for displaying said video signals and even-numbered lines serving as ineffective scanning lines not used for displaying said video signals, and

each of said second fields including odd-numbered lines serving as ineffective scanning lines not used for displaying said video signals and even-numbered lines serving as effective scanning lines used for displaying said video signals; and

a display control section which controls said display device such that said display device displays said first and second fields generated by said signal converter section, alternately in terms of time.

4. An image display system comprising:

a display device;

an input section to which video signals are inputted;

a signal converter section which increases horizontal scanning lines of said video signals inputted to said input section, and which generates odd-numbered fields and even-numbered fields,

each of said odd-numbered fields including odd-numbered lines serving as effective scanning lines used for displaying said video signals and even-numbered lines serving as ineffective scanning lines not used for displaying said video signals, and

each of said even-numbered fields including odd-numbered lines serving as ineffective scanning lines not used for displaying said video signals and even-numbered lines serving as effective scanning lines used for displaying said video signals; and

a display control section which controls said display based upon signals of said odd-numbered and even-numbered fields generated by said signal converter section.

5. An image display system according to claim 4, wherein said display device is a plasma display device.

6. An image display system according to claim 4, wherein said video signals inputted to said input section comply with an interlace scanning system.

7. An image display system according to claim 6, wherein said video signals inputted to said input section comply with the National Television System Committee (NTSC) color television system.