Abstract

The image quality of a color liquid-crystal display monitor is studied by changing the contrast and the luminance levels. The resolution is assessed with modulation transfer function area (MTFA) that is measured at nine different combinations of the luminance and contrast. At these combinations, we measure the chromaticity coordinates and luminance of red-green-blue channels as a function of the digital–analog convert value. We analyze the relations among MTFA value, constant-channel chromaticity, color gamut, and maximum luminance of a white pattern. From the results, the combination of levels is found that provides both high resolution and good color reproduction.

© 2000 Optical Society of America

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References

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  1. P. G. J. Barten, “Resolution of liquid-crystal displays,” SID 91 Digest 22, 772–775 (1991).
  2. G. Murch, L. Virgin, R. Beaton, “Resolution and addressability: how much is enough?” Proc. SID 26, 305–308 (1985).
  3. J. Morreale, “Color in electronic displays,” in 1999Society for Information Display International Symposium, Vol. II of SID Seminar Lecture Notes (Society for Information Display, San Jose, 1999), F-2/72.
  4. C. Infante, “On the of matrix displays,” J. SID 1/4, 449–450 (1993).
  5. T. H. Kim, Y. W. Lee, H. M. Cho, I. W. Lee, “Evaluation of image quality of color liquid crystal display by measuring modulation transfer function,” Opt. Eng. 38, 1671–1678 (1999).
    [CrossRef]
  6. P.-C. Hung, R. S. Bern, “Determination of constant hue loci for a CRT gamut and their predictions using color appearance spaces,” Color Res. Appl. 20, 285–195 (1995).
    [CrossRef]
  7. J. A. Diaz, J. R. Jimenez, E. Hitta, L. J. Barco, “Optimizing the contrast-channel chromaticity and color gamut of CRT color displays by control of brightness and contrast levels,” Appl. Opt. 35, 1711–1718 (1996).
    [CrossRef]
  8. J. Morreale, “Color characterization and reproduction of TN-LCDs,” in 1999 Society for Information Display International Symposium Digest of Technical Papers (Society for Information Display, San Jose, 1999), pp. 790–797.
  9. L. Jimenez del Barco, J. A. Diaz, J. R. Jiminez, M. Rubino, “Considerations on the calibration of color displays assuming constant channel chromaticity,” Color Res. Appl. 20, 377–387 (1995).
    [CrossRef]
  10. D. H. Brainard, “Calibration of a computer controlled color monitor,” Color Res. Appl. 14, 23–34 (1989).
    [CrossRef]
  11. R. S. Berns, R. J. Motta, M. E. Gorzynski, “CRT colorimetry, part 1: theory and practice,” Color Res. Appl. 18, 299–314 (1993).
    [CrossRef]
  12. J. N. Cook, P. A. Sample, R. N. Weinreb, “Solution to spatial inhomogeneity on video monitors,” Color Res. Appl. 18, 334–340 (1993).
    [CrossRef]
  13. P. G. J. Barten, “The SQRI method: a new method for the evaluation of visible resolution on display,” Proc. SID 28, 253–262 (1987).

1999 (1)

T. H. Kim, Y. W. Lee, H. M. Cho, I. W. Lee, “Evaluation of image quality of color liquid crystal display by measuring modulation transfer function,” Opt. Eng. 38, 1671–1678 (1999).
[CrossRef]

1996 (1)

1995 (2)

L. Jimenez del Barco, J. A. Diaz, J. R. Jiminez, M. Rubino, “Considerations on the calibration of color displays assuming constant channel chromaticity,” Color Res. Appl. 20, 377–387 (1995).
[CrossRef]

P.-C. Hung, R. S. Bern, “Determination of constant hue loci for a CRT gamut and their predictions using color appearance spaces,” Color Res. Appl. 20, 285–195 (1995).
[CrossRef]

1993 (3)

R. S. Berns, R. J. Motta, M. E. Gorzynski, “CRT colorimetry, part 1: theory and practice,” Color Res. Appl. 18, 299–314 (1993).
[CrossRef]

J. N. Cook, P. A. Sample, R. N. Weinreb, “Solution to spatial inhomogeneity on video monitors,” Color Res. Appl. 18, 334–340 (1993).
[CrossRef]

C. Infante, “On the of matrix displays,” J. SID 1/4, 449–450 (1993).

1991 (1)

P. G. J. Barten, “Resolution of liquid-crystal displays,” SID 91 Digest 22, 772–775 (1991).

1989 (1)

D. H. Brainard, “Calibration of a computer controlled color monitor,” Color Res. Appl. 14, 23–34 (1989).
[CrossRef]

1987 (1)

P. G. J. Barten, “The SQRI method: a new method for the evaluation of visible resolution on display,” Proc. SID 28, 253–262 (1987).

1985 (1)

G. Murch, L. Virgin, R. Beaton, “Resolution and addressability: how much is enough?” Proc. SID 26, 305–308 (1985).

Barco, L. J.

Barten, P. G. J.

P. G. J. Barten, “Resolution of liquid-crystal displays,” SID 91 Digest 22, 772–775 (1991).

P. G. J. Barten, “The SQRI method: a new method for the evaluation of visible resolution on display,” Proc. SID 28, 253–262 (1987).

Beaton, R.

G. Murch, L. Virgin, R. Beaton, “Resolution and addressability: how much is enough?” Proc. SID 26, 305–308 (1985).

Bern, R. S.

P.-C. Hung, R. S. Bern, “Determination of constant hue loci for a CRT gamut and their predictions using color appearance spaces,” Color Res. Appl. 20, 285–195 (1995).
[CrossRef]

Berns, R. S.

R. S. Berns, R. J. Motta, M. E. Gorzynski, “CRT colorimetry, part 1: theory and practice,” Color Res. Appl. 18, 299–314 (1993).
[CrossRef]

Brainard, D. H.

D. H. Brainard, “Calibration of a computer controlled color monitor,” Color Res. Appl. 14, 23–34 (1989).
[CrossRef]

Cho, H. M.

T. H. Kim, Y. W. Lee, H. M. Cho, I. W. Lee, “Evaluation of image quality of color liquid crystal display by measuring modulation transfer function,” Opt. Eng. 38, 1671–1678 (1999).
[CrossRef]

Cook, J. N.

J. N. Cook, P. A. Sample, R. N. Weinreb, “Solution to spatial inhomogeneity on video monitors,” Color Res. Appl. 18, 334–340 (1993).
[CrossRef]

Diaz, J. A.

J. A. Diaz, J. R. Jimenez, E. Hitta, L. J. Barco, “Optimizing the contrast-channel chromaticity and color gamut of CRT color displays by control of brightness and contrast levels,” Appl. Opt. 35, 1711–1718 (1996).
[CrossRef]

L. Jimenez del Barco, J. A. Diaz, J. R. Jiminez, M. Rubino, “Considerations on the calibration of color displays assuming constant channel chromaticity,” Color Res. Appl. 20, 377–387 (1995).
[CrossRef]

Gorzynski, M. E.

R. S. Berns, R. J. Motta, M. E. Gorzynski, “CRT colorimetry, part 1: theory and practice,” Color Res. Appl. 18, 299–314 (1993).
[CrossRef]

Hitta, E.

Hung, P.-C.

P.-C. Hung, R. S. Bern, “Determination of constant hue loci for a CRT gamut and their predictions using color appearance spaces,” Color Res. Appl. 20, 285–195 (1995).
[CrossRef]

Infante, C.

C. Infante, “On the of matrix displays,” J. SID 1/4, 449–450 (1993).

Jimenez, J. R.

Jimenez del Barco, L.

L. Jimenez del Barco, J. A. Diaz, J. R. Jiminez, M. Rubino, “Considerations on the calibration of color displays assuming constant channel chromaticity,” Color Res. Appl. 20, 377–387 (1995).
[CrossRef]

Jiminez, J. R.

L. Jimenez del Barco, J. A. Diaz, J. R. Jiminez, M. Rubino, “Considerations on the calibration of color displays assuming constant channel chromaticity,” Color Res. Appl. 20, 377–387 (1995).
[CrossRef]

Kim, T. H.

T. H. Kim, Y. W. Lee, H. M. Cho, I. W. Lee, “Evaluation of image quality of color liquid crystal display by measuring modulation transfer function,” Opt. Eng. 38, 1671–1678 (1999).
[CrossRef]

Lee, I. W.

T. H. Kim, Y. W. Lee, H. M. Cho, I. W. Lee, “Evaluation of image quality of color liquid crystal display by measuring modulation transfer function,” Opt. Eng. 38, 1671–1678 (1999).
[CrossRef]

Lee, Y. W.

T. H. Kim, Y. W. Lee, H. M. Cho, I. W. Lee, “Evaluation of image quality of color liquid crystal display by measuring modulation transfer function,” Opt. Eng. 38, 1671–1678 (1999).
[CrossRef]

Morreale, J.

J. Morreale, “Color in electronic displays,” in 1999Society for Information Display International Symposium, Vol. II of SID Seminar Lecture Notes (Society for Information Display, San Jose, 1999), F-2/72.

J. Morreale, “Color characterization and reproduction of TN-LCDs,” in 1999 Society for Information Display International Symposium Digest of Technical Papers (Society for Information Display, San Jose, 1999), pp. 790–797.

Motta, R. J.

R. S. Berns, R. J. Motta, M. E. Gorzynski, “CRT colorimetry, part 1: theory and practice,” Color Res. Appl. 18, 299–314 (1993).
[CrossRef]

Murch, G.

G. Murch, L. Virgin, R. Beaton, “Resolution and addressability: how much is enough?” Proc. SID 26, 305–308 (1985).

Rubino, M.

L. Jimenez del Barco, J. A. Diaz, J. R. Jiminez, M. Rubino, “Considerations on the calibration of color displays assuming constant channel chromaticity,” Color Res. Appl. 20, 377–387 (1995).
[CrossRef]

Sample, P. A.

J. N. Cook, P. A. Sample, R. N. Weinreb, “Solution to spatial inhomogeneity on video monitors,” Color Res. Appl. 18, 334–340 (1993).
[CrossRef]

Virgin, L.

G. Murch, L. Virgin, R. Beaton, “Resolution and addressability: how much is enough?” Proc. SID 26, 305–308 (1985).

Weinreb, R. N.

J. N. Cook, P. A. Sample, R. N. Weinreb, “Solution to spatial inhomogeneity on video monitors,” Color Res. Appl. 18, 334–340 (1993).
[CrossRef]

Appl. Opt. (1)

Color Res. Appl. (5)

P.-C. Hung, R. S. Bern, “Determination of constant hue loci for a CRT gamut and their predictions using color appearance spaces,” Color Res. Appl. 20, 285–195 (1995).
[CrossRef]

L. Jimenez del Barco, J. A. Diaz, J. R. Jiminez, M. Rubino, “Considerations on the calibration of color displays assuming constant channel chromaticity,” Color Res. Appl. 20, 377–387 (1995).
[CrossRef]

D. H. Brainard, “Calibration of a computer controlled color monitor,” Color Res. Appl. 14, 23–34 (1989).
[CrossRef]

R. S. Berns, R. J. Motta, M. E. Gorzynski, “CRT colorimetry, part 1: theory and practice,” Color Res. Appl. 18, 299–314 (1993).
[CrossRef]

J. N. Cook, P. A. Sample, R. N. Weinreb, “Solution to spatial inhomogeneity on video monitors,” Color Res. Appl. 18, 334–340 (1993).
[CrossRef]

J. SID (1)

C. Infante, “On the of matrix displays,” J. SID 1/4, 449–450 (1993).

Opt. Eng. (1)

T. H. Kim, Y. W. Lee, H. M. Cho, I. W. Lee, “Evaluation of image quality of color liquid crystal display by measuring modulation transfer function,” Opt. Eng. 38, 1671–1678 (1999).
[CrossRef]

Proc. SID (2)

G. Murch, L. Virgin, R. Beaton, “Resolution and addressability: how much is enough?” Proc. SID 26, 305–308 (1985).

P. G. J. Barten, “The SQRI method: a new method for the evaluation of visible resolution on display,” Proc. SID 28, 253–262 (1987).

SID 91 Digest (1)

P. G. J. Barten, “Resolution of liquid-crystal displays,” SID 91 Digest 22, 772–775 (1991).

Other (2)

J. Morreale, “Color characterization and reproduction of TN-LCDs,” in 1999 Society for Information Display International Symposium Digest of Technical Papers (Society for Information Display, San Jose, 1999), pp. 790–797.

J. Morreale, “Color in electronic displays,” in 1999Society for Information Display International Symposium, Vol. II of SID Seminar Lecture Notes (Society for Information Display, San Jose, 1999), F-2/72.

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Figures (6)

Fig. 1
Fig. 1

Schematic diagram of the MTF measurement system.

Fig. 2
Fig. 2

(a) LSF and (b) MTF measured in the vertical direction at the luminance and the contrast control positions tabulated in Table 2.

Fig. 3
Fig. 3

Chromaticity coordinates of the R channel as a function of the DAC value at the luminance and the contrast control positions in Table 2.

Fig. 4
Fig. 4

Chromaticity coordinates of the G channel as a function of the DAC value at the luminance and the contrast control positions in Table 2.

Fig. 5
Fig. 5

Chromaticity coordinates of the B channel as a function of the DAC value at the luminance and the contrast control positions in Table 2.

Fig. 6
Fig. 6

Color gamuts of the color LCD monitor at the luminance and the contrast control positions in Table 2 in the CIE-1931 chromaticity diagram.

Tables (2)

Tables Icon

Table 1 Main Specifications of a Color LCD Under Test

Tables Icon

Table 2 Definition of Nine Different Combinations of the Luminance and the Contrast Levels, the Luminance Value of a White Pattern, and the MTFA Value

Equations (8)

Equations on this page are rendered with MathJax. Learn more.

MTFν=-+ lxexp-i2πνxdx,
Mtu=1au exp-bu1+c expbu1/2,
u=π180 lν,
a=4401+0.7/L-0.2,
b=0.31+100/L0.15,
c=0.06.
MTFA=0umaxMTFu-Mtudu,
umax=uNyifuNy<uc,uNy or ucifuNy=uc,ucifuNy>uc,

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