Flat panel image reconstruction interface for producing a non-interlaced video signal

• US 5,381,182 A
• Filed: 09/28/1993
• Issued: 01/10/1995
• Est. Priority Date: 09/28/1993
• Status: Expired due to Term

• Current Assignee: Honeywell Incorporated (Honeywell International Inc.)
• Original Assignee: Honeywell Incorporated (Honeywell International Inc.)
• Inventors: Miller, David W., Nelson, Larry A., Robinder, Ronald C.
• Primary Examiner(s): Groody, James J.
• Assistant Examiner(s): Metjahic, Safet
• Application Number:
  US08/127,534
• Time in Patent Office: 469 Days
• Field of Search: 358/140, 358/11, 358/59, 358/236, 358/240, 358/241, 358/138, 345/138, 345/132, 345/154, 345/100, 345/213, 345/3
• US Class Current: 348/448
• CPC Class Codes: G09G 2310/0229 De-interlacing
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: H04N 5/70 Circuit details for electroluminescent devices
• CPC Class Codes: H04N 7/012 Conversion between an interlaced and a progressive signal for graphics images G09G2310/0229
• CPC Class Codes: H04N 7/0135 involving interpolation processes interpolation-based image scaling G06T3/4007; interpolation for video coding H04N19/587, H04N19/59

Abstract

An electronic interface for converting an interlaced video signal to a non-interlaced video signal suitable for an LCD flat panel. An analog interpolator scheme is used in which the information available in an incoming video scan line is delayed and sampled, and output signals are created by interpolation between the sampled input and actual and interpolated scan line signals. The output signals are then converted into an integrated, sequential non-interlaced output signal having a frequency corresponding to the horizontal resolution of a scan line of the flat panel.

Claims

1. A video interface apparatus to convert an incoming interlaced video signal to an outgoing non-interlaced video signal suitable for an LCD flat panel, the apparatus comprising:

(a) line splitter means for splitting the incoming video signal into an original signal and at least one delayed signal for later use in generating the outgoing non-interlaced video signal;

(b) interpolation means connected to the line splitter means for weighting the delayed signal and for providing an interpolated analog output signal of the delayed signal and the original signal, wherein the interpolated analog output signal comprises a plurality of discrete non-interlaced scan line signals which are both actual and interpolated, and wherein each of the plurality of interpolated scan line signals comprise an average signal between two adjacent scan line signals; and

(c) output means connected to the interpolation means for converting the plurality of actual and interpolated scan line signals into an integrated, sequential, non-interlaced signal output having a frequency corresponding to the horizontal resolution of a scan line of the flat panel.

2. The video interface apparatus of claim 1, wherein the line splitter means comprises at least one charge coupled device for providing at least one delayed signal.

3. The video interface apparatus of claim 1, wherein the interpolation means further comprises means for averaging the incoming video signal and the weighted conditioned signal to provide the interpolated output of the analog signal.

4. The video interface apparatus of claim 1, wherein the output means comprises a multiplexer.

5. The video interface apparatus of claim 1, wherein:

(a) the incoming video signal comprises a color video signal having red, green, and blue (RGB) components; and

(b) the line delay means, interpolation means, and output means are duplicated in triplicate to process the RGB components of the incoming color video signal.

6. The video interface apparatus of claim 1 further comprising line filter means connected to the line delay means for filtering the delayed signal to provide a smoothly varying analog signal.

7. The video interface apparatus of claim 6, wherein the line filter means comprises a low pass filter (LPF).

8. A video interface apparatus to convert an incoming interlaced video signal to an outgoing non-interlaced video signal suitable for an LCD flat panel, the apparatus comprising:

(a) first filter means for filtering the incoming video signal;

(b) line splitter means connected to the first filter means for splitting the incoming video signal into an original signal and at least one delayed signal for later use in generating the outgoing non-interlaced video signal;

(c) second filter means connected to the line splitter means for filtering the delayed signal and providing a smoothly varying analog signal;

(d) interpolation means connected to the second filter means for weighting the analog signal and for providing an interpolated output of the analog signal, wherein the interpolated analog output signal comprises a plurality of discrete non-interlaced scan line signals which are both actual and interpolated, and wherein each of the plurality of interpolated scan line signals comprise an average signal between two adjacent scan line signals;

(e) row sampling means connected to the interpolation means for sampling the interpolated output from the interpolation means and for converting the plurality of actual and interpolated scan line signals into an integrated, sequential, non-interlaced signal output having a frequency corresponding to the horizontal resolution of a scan line of the flat panel; and

(f) output means connected to the row sampling means for sequentially reading the converted signal output from each of the plurality of row sampling means and providing the outgoing non-interlaced video signal.

9. The video interface apparatus of claim 8, wherein the first filter means comprises an LPF.

10. The video interface apparatus of claim 8, wherein the line splitter means comprises at least one charge coupled device for providing at least one delayed signal.

11. The video interface apparatus of claim 8, wherein the second filter means comprises an LPF.

12. The video interface apparatus of claim 8, wherein the interpolation means comprises a plurality of summing amplifiers connected to the incoming video signal and the smoothly varying analog signal.

13. The video interface apparatus of claim 8, wherein the interpolation means further comprises means for averaging the incoming video signal and the weighted analog signal to provide the interpolated output of the analog signal.

14. The video interface apparatus of claim 8, wherein the row sampling means comprises a plurality of charge coupled devices.

15. The video interface apparatus of claim 8, wherein the output means comprises a multiplexer.

16. The video interface apparatus of claim 8, wherein:

(a) the incoming video signal comprises a color video signal having RGB components; and

(b) the first filter means, line delay means, second filter means, plurality of interpolation means, plurality of row sampling means and output means are duplicated in triplicate to process the RGB components of the incoming color video signal.

17. A video interface apparatus to convert an incoming interlaced video signal to an outgoing non-interlaced video signal suitable for an LCD flat panel, the apparatus comprising:

(a) first LPF means for filtering the incoming video signal;

(b) line splitter means connected to the first LPF means for splitting the incoming video signal into an original signal and at least one delayed signal for later use in generating the outgoing non-interlaced video signal;

(c) second LPF means connected to the line splitter means for filtering the output signal and providing a smoothly varying analog signal;

(d) a plurality of summing amplifier means connected to the second LPF means and incoming video signal for weighting the analog signal and averaging the incoming video signal and the weighted analog signal to provide the interpolated output of the analog signal, wherein the interpolated analog output signal comprises a plurality of discrete non-interlaced scan line signals which are both actual and interpolated, and wherein each of the plurality of interpolated scan line signals comprise an average signal between two adjacent scan line signals;

(e) a plurality of row sampling means connected to the plurality of summing amplifier means for sampling the interpolated output from each of the plurality of summing amplifier means and for converting the plurality of actual and interpolated scan line signals into an integrated signal output having a frequency corresponding to the horizontal resolution of a scan line of the flat panel; and

(f) multiplexer means connected to the plurality of row sampling means for sequentially reading the converted output from each of the plurality of row sampling means and providing the outgoing non-interlaced video signal.

18. The video interface apparatus of claim 17, wherein the line splitter means comprises at least one charge coupled device for providing at least one delayed signal.

19. The video interface apparatus of claim 17, wherein the plurality of row sampling means comprises a plurality of charge coupled devices.

20. The video interface apparatus of claim 17, wherein:

(a) the incoming video signal comprises a color video signal having RGB components; and

(b) the first LPF means, line delay means, second LPF means, plurality of summing amplifier means, plurality of row sampling means and multiplexer means are duplicated in triplicate to process the RGB components of the incoming color video signal.