What is claimed is:
1. An image processing apparatus, comprising:
a first signal processing circuit for applying gamma correction to an n-bit (n: a natural number) digital signal inputted as a video signal, and for converting the digital signal into an m-bit (m>n, m: a natural number) digital signal; and
a second signal processing circuit for adding a noise signal to the m-bit digital signal from said first signal processing circuit, and for outputting a Q-bit (Q: a natural number) digital signal obtained from rounding off a less significant (m – Q) bit (Q <n) from the m-bit digital signal.
2. The image processing apparatus as set forth in claim 1, wherein:
said first signal processing circuit includes bit converting means for converting the inputted n-bit digital signal into the m-bit digital signal in accordance with a pre-set value.
3. The image processing apparatus as set forth in claim 2, wherein:
said bit converting means is a Look Up Table which outputs the m-bit digital signal that is the present value in accordance with the inputted n-bit digital signal.
4. The image processing apparatus as set forth in claim 2, wherein:
said bit converting means is a calculating device for converting the n-bit digital signal into the m-bit (m>n) digital signal by numerical calculation.
5. The image processing apparatus as set forth in claim 1, wherein:
said first signal processing circuit and said second signal processing circuit are provided for respective RGB colors.
6. The image processing apparatus as set forth in claim 1, wherein:
an average value of a signal level of the noise signal is set to zero.
7. The image processing apparatus as set forth in claim 1, wherein:
the noise signal is a random noise signal with no regularity in its cycle of amplitude.
8. The image processing apparatus as set forth in claim 1, wherein:
the noise signal is obtained from, by using an arbitrary noise pattern table, switching a starting point of the noise pattern table per field or per noise pattern table.
9. The image processing apparatus as set forth in claim 1, wherein:
a histogram of an amplitude of the noise signal shows Gaussian dispersion where zero amplitude of the noise signal is at the center.
10. An image processing apparatus, comprising:
a signal processing circuit for adding a noise signal to an inputted m-bit (m: a natural number) digital signal, and for outputting a Q-bit (Q: a natural number) digital signal obtained from rounding off a less significant (mQ) bit (Q<m) from the m-bit digital signal.
11. An image display apparatus comprising a display means for displaying an image, and driving means for driving the display means, said image display apparatus, further comprising:
an image processing apparatus that includes (a) a first signal processing circuit for applying gamma correction to an n-bit (n: a natural number) digital signal inputted as a video signal and for converting the n-bit digital signal into an m-bit (m>n, m: a natural number) digital signal, and (b) a second signal processing circuit for adding a noise signal to the m-bit digital signal from said first signal processing circuit and for outputting a Q-bit (Q: a natural number) digital signal obtained from rounding off a less significant (mQ) bit (Qn) from the m-bit digital signal.
12. The image display apparatus as set forth in claim 11, wherein:
said first signal processing circuit includes bit converting means for converting the inputted n-bit digital signal into the m-bit digital signal in accordance with a pre-set value.
13. The image display apparatus as set forth in claim 12, wherein:
the pre-set value in said bit converting means is rewritable so that unevenness in properties of said driving means may be absorbed.
14. The image display apparatus as set forth in claim 12, wherein:
the pre-set value in said bit converting means is rewritten in accordance with brightness in surroundings of said image display apparatus.
15. The image display apparatus as set forth in claim 12, wherein:
the pre-set value in said bit converting means is rewritten in accordance with brightness of overall display image of said display means.
16. An image display apparatus, comprising:
an image processing apparatus which includes a signal processing circuit for adding a noise signal to an inputted m-bit (m: a natural number) digital signal and for outputting a Q-bit (Q: a natural number) digital signal obtained from rounding off a less significant (mQ) bit (Q<m) from the m-bit digital signal.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A display device, comprising:
a display panel configured to display an image; and
a backlight unit configured to provide light to the display panel,
wherein the display panel comprises:
an array substrate comprising a plurality of pixel areas;
an opposite substrate facing the array substrate;
a liquid crystal layer disposed between the array substrate and the opposite substrate; and
a wavelength-selective transflective member disposed on the array substrate or the opposite substrate.
2. The display device of claim 1, further comprising:
a color filter layer disposed on the opposite substrate, the color filter layer comprising a plurality of color filters comprising a plurality of colors,
wherein the wavelength-selective transflective member comprises an opening formed therethrough and corresponding to at least one of the plurality of color filters.
3. The display device of claim 2, wherein the wavelength-selective transflective member is configured to reflect light of one or more wavelengths corresponding to the color of the color filter corresponding to the opening.
4. The display device of claim 3, wherein:
a first plurality of the plurality of color filters comprising different colors is sequentially arranged in a first direction; and
a second plurality of the plurality of color filters comprising the same color is arranged in a second direction substantially perpendicular to the first direction.
5. The display device of claim 4, wherein the opening is stripe shaped.
6. The display device of claim 1, wherein the wavelength-selective transflective member comprises:
a plurality of first layers configured to transmit light; and
a plurality of second layers comprising a refractive index different from a refractive index of the plurality of first layers, and
wherein the plurality of first layers are alternately arranged with the plurality of second layers.
7. The display device of claim 6, wherein:
the plurality of first layers and the plurality of second layers comprise a refractive index from about 1.3 to about 2.4; and
a difference in the refractive index between the plurality of first layers and the plurality of second layers is equal to or greater than about 0.1.
8. The display device of claim 6, wherein the plurality of first layers comprises a metal oxide material configured to transmit light.
9. The display device of claim 6, wherein the plurality of second layers comprises a silicon oxide material configured to transmit light.
10. The display device of claim 1, wherein the wavelength-selective transflective member is disposed between the array substrate and the liquid crystal layer.
11. The display device of claim 1, wherein the wavelength-selective transflective member is disposed between the opposite substrate and the liquid crystal layer.
12. A display device, comprising:
a display panel configured to display an image; and
a backlight unit configured to provide light to the display panel,
wherein the display panel comprises:
an array substrate comprising a plurality of pixel areas;
an opposite substrate facing the array substrate;
a liquid crystal layer disposed between the array substrate and the opposite substrate; and
a wavelength-selective transflective member comprising a plurality of sub-wavelength selective transflective members, the wavelength-selective transflective member being disposed on the array substrate or the opposite substrate and being configured to transmit light of different wavelengths.
13. The display device of claim 12, wherein the plurality of sub-wavelength selective transflective members comprise:
a first sub-wavelength selective transflective member;
a second sub-wavelength selective transflective member; and
a third sub-wavelength selective transflective member.
14. The display device of claim 13, further comprising:
a color filter layer comprising a plurality of color filters,
wherein the first sub-wavelength selective transflective member is disposed in association with a first one of the plurality of color filters and is configured to transmit light of a first wavelength, the second sub-wavelength selective transflective member is disposed in association with a second one of the plurality of color filters and is configured to transmit light of a second wavelength, and the third sub-wavelength selective transflective member is disposed in association with a third one of the plurality of color filters and is configured to transmit light of a third wavelength.
15. The display device of claim 14, wherein the first, second, and third sub-wavelength selective transflective members are disposed on the same layer.
16. The display device of claim 14, wherein the first, second, and third sub-wavelength selective transflective members are disposed on different layers.
17. The display device of claim 16, wherein the wavelength-selective transflective member further comprises:
a first protective layer covering the first sub-wavelength selective transflective member;
a second protective layer disposed on the first protective layer, the second protective layer covering the second sub-wavelength selective transflective member; and
a third protective layer disposed on the second protective layer, the third protective layer covering the third sub-wavelength selective transflective member.
18. The display device of claim 17, wherein the first, second, and third protective layers comprise an organic material or an inorganic material configured to transmit light.
19. The display device of claim 12, wherein the wavelength-selective transflective member is disposed between the array substrate and the liquid crystal layer.
20. The display device of claim 12, wherein the wavelength-selective transflective member is disposed between the opposite substrate and the liquid crystal layer.
21. A display panel, comprising:
a wavelength-selective transflective member configured to transmit light of at least one first range of wavelengths and reflect light of at least one second range of wavelengths; and
a plurality of color filters disposed on the wavelength-selective transflective member,
wherein the wavelength-selective transflective member comprises an aperture disposed in association with one of the plurality of color filters.
22. The display panel of claim 21, wherein the plurality of color filters comprise:
at least one red color filter;
at least one green color filter; and
at least one blue color filter.
23. The display panel of claim 21, wherein the color of the one color filter disposed in association with the aperture corresponds to the color of light associated with the second range of wavelengths.
24. The display panel of claim 21, wherein at least some of the light reflected by the wavelength-selective transflective member is caused, at least in part, to be redirected through the aperture.
25. The display panel of claim 21, wherein the plurality of color filters is sequentially arranged with respect to one another.
26. The display panel of claim 21, wherein the wavelength-selective transflective member comprises a plurality of sub-wavelength selective transflective members, and wherein:
a first one of the plurality of sub-wavelength selective transflective members is disposed in association with a first one of the plurality of color filters and is configured to transmit light of a range of wavelengths corresponding to the color of the first one of the plurality of color filters;
a second one of the plurality of sub-wavelength selective transflective members is disposed in association with a second one of the plurality of color filters and is configured to transmit light of a range of wavelengths corresponding to the color of the second one of the plurality of color filters; and
a third one of the plurality of sub-wavelength selective transflective member is disposed in association with a third one of the plurality of color filters and is configured to transmit light of a range of wavelengths corresponding to the color of the third one of the plurality of color filters.
27. The display panel of claim 26, wherein the plurality of sub-wavelength selective transflective members are disposed on the same layer.
28. The display panel of claim 26, wherein each of the plurality of sub-wavelength selective transflective members are disposed on a different layer than the other ones of the plurality of sub-wavelength selective transflective members.
29. The display panel of claim 28, wherein the wavelength-selective transflective member further comprises:
a first protective layer covering the first sub-wavelength selective transflective member;
a second protective layer disposed on the first protective layer, the second protective layer covering the second sub-wavelength selective transflective member; and
a third protective layer disposed on the second protective layer, the third protective layer covering the third sub-wavelength selective transflective member.
30. The display panel of claim 21, further comprising:
a liquid crystal layer,
wherein the wavelength-selective transflective member is disposed between the liquid crystal layer and the plurality of color filters.
31. The display panel of claim 21, further comprising:
a liquid crystal layer,
wherein the liquid crystal layer is disposed between the plurality of color filters and the wavelength-selective transflective member.