Claims
- 1. A display apparatus comprising:display means including a display panel having a plurality of unit pixels each divided into at least three sub-pixels for displaying a halftone, said at least three sub-pixels having mutually different areas, wherein one sub-pixel with the largest area among said at least three sub-pixels has a maximum area which does not exceed a total area of the remaining sub-pixels among said at least three sub-pixels; and an image processing circuit for displaying a number of halftone levels on said display panel by said plurality of unit pixels, with the number being larger than a number of halftone levels that can be displayed by a single unit pixel, wherein each said unit pixel is divided into three longitudinally elongated color pixels which are disposed laterally adjacently, and each color pixel is divided only in a longitudinal direction into said at least three sub-pixels having areal ratios such that at least one halftone level can be displayed by selecting one from at least two display patterns each formed by a combination of on-state and off-state of the sub-pixels.
- 2. An apparatus according to claim 1, including a plurality of pixels each divided into a plurality of color pixels for color display comprising said unit pixels, each of which is divided into said at least three sub-pixels.
- 3. An apparatus according to claim 1, wherein the maximum area of the one sub-pixel is smaller than the total area of the remaining sub-pixels.
- 4. A display apparatus according to claim 1, wherein said unit pixel is divided into three sub-pixels having an areal ratio of 1:2:3.
- 5. A display apparatus according to claim 1, wherein one unit pixel is divided into four sub-pixels having areal ratios selected from 1:2:3:6, 1:2:4:7, 1:2:3:5, 1:2:3:4, 1:2:4:5, 1:2:4:6, 2:3:4:5 or 2:3:4:6.
- 6. A display apparatus according to claim 1, wherein said at least three pixels include a smallest sub-pixel and a second smallest sub-pixel having an areal ratio of 1:2.
- 7. A display apparatus comprising:display means including a display panel having a plurality of unit pixels each divided into at least three sub-pixels for displaying a halftone, said at least three sub-pixels having mutually different areas, wherein one sub-pixel with the largest area among said at least three sub-pixels has a maximum area which does not exceed a total area of the remaining sub-pixels among said at least three sub-pixels; and an image processing circuit for converting data into binary data according to a dither method, wherein each said unit pixel is divided into three longitudinally elongated color pixels which are disposed laterally adjacently, and each color pixel is divided only in a longitudinal direction into said at least three sub-pixels having areal ratios such that at least one halftone level can be displayed by selecting one from at least two display patterns each formed by a combination of on-state and off-state of said sub-pixels.
- 8. An apparatus according to claim 7, including a plurality of pixels each divided into a plurality of color pixels for color display comprising said unit pixels, each of which is divided into said at least three sub-pixels.
- 9. An apparatus according to claim 7, wherein the maximum area of the one sub-pixel is smaller than the total area of the remaining sub-pixels.
- 10. A display apparatus according to claim 7, wherein said unit pixel is divided into three sub-pixels having an areal ratio of 1:2:3.
- 11. A display apparatus according to claim 7, wherein one unit pixel is divided into four sub-pixels having areal ratios selected from 1:2:3:6, 1:2:4:7, 1:2:3:5, 1:2:3:4, 1:2:4:5, 1:2:4:6, 2:3:4:5 or 2:3:4:6.
- 12. A display apparatus according to claim 7, wherein said at least three pixels include a smallest sub-pixel and a second smallest sub-pixel having an areal ratio of 1:2.
- 13. A display apparatus comprising:display means including a display panel having a plurality of unit pixels each divided into at least three sub-pixels for displaying a halftone, said at least three sub-pixels having mutually different areas, wherein one sub-pixel with the largest area among said at least three sub-pixels has a maximum area which does not exceed a total area of the remaining sub-pixels among said at least three sub-pixels; and an image processing circuit for converting data into binary data by an error-diffusion method, wherein each said unit pixel is divided into three longitudinally elongated color pixels which are disposed laterally adjacently, and each color pixel is divided only in a longitudinal direction into said at least three sub-pixels having areal ratios such that at least one halftone level can be displayed by selecting one from at least two display patterns each formed by a combination of on-state and off-state of the sub-pixels.
- 14. An apparatus according to claim 13, including a plurality of pixels each divided into a plurality of color pixels for color display comprising said unit pixels, each of which is divided into said at least three sub-pixels.
- 15. An apparatus according to claim 13, wherein the maximum area of the one sub-pixel is smaller than the total area of the remaining sub-pixels.
- 16. A display apparatus according to claim 13, wherein said unit pixel is divided into three sub-pixels having an areal ratio of 1:2:3.
- 17. A display apparatus according to claim 13, wherein one unit pixel is divided into four sub-pixels having areal ratios selected from 1:2:3:6, 1:2:4:7, 1:2:3:5, 1:2:3:4, 1:2:4:5, 1:2:4:6, 2:3:4:5 or 2:3:4:6.
- 18. A display apparatus according to claim 13, wherein said at least three pixels include a smallest sub-pixel and a second smallest sub-pixel having an areal ratio of 1:2.
- 19. A display apparatus comprising:display means including a display panel having a plurality of unit pixels each divided into at least three sub-pixels for displaying a halftone, said at least three sub-pixels having mutually different areas, wherein one sub-pixel with the largest area among said at least three sub-pixels has a maximum area which does not exceed a total area of the remaining sub-pixels among said at least three sub-pixels; and an image processing circuit for converting data into binary data by a density pattern method, wherein each said unit pixel is divided into three longitudinally elongated color pixels which are disposed laterally adjacently, and each color pixel is divided only in a longitudinal direction into said at least three sub-pixels having areal ratios such that at least one halftone level can be displayed by selecting one from at least two display patterns each formed by a combination of on-state and off-state of the sub-pixels.
- 20. An apparatus according to claim 19, including a plurality of pixels each divided into a plurality of color pixels for color display comprising said unit pixels, each of which is divided into said at least three sub-pixels.
- 21. An apparatus according to claim 19, wherein the maximum area of the one sub-pixel is smaller than the total area of the remaining sub-pixels.
- 22. A display apparatus according to claim 19, wherein said unit pixel is divided into three sub-pixels having an areal ratio of 1:2:3.
- 23. A display apparatus according to claim 19, wherein one unit pixel is divided into four sub-pixels having areal ratios selected from 1:2:3:6, 1:2:4:7, 1:2:3:5, 1:2:3:4, 1:2:4:5, 1:2:4:6, 2:3:4:5 or 2:3:4:6.
- 24. A display apparatus according to claim 19, wherein said at least three pixels include a smallest sub-pixel and a second smallest sub-pixel having an areal ratio of 1:2.
- 25. A display apparatus, comprising:display means including a display panel having a plurality of pixels each divided into a plurality of color pixels for color display, including color pixels of at least one color each divided into at least three sub-pixels, said at least three sub-pixels having mutually different areas, wherein one sub-pixel with the largest area among said at least three sub-pixels has a maximum area which is smaller than a total area of the remaining sub-pixels; and an image processing circuit for displaying a number of halftone levels by plural color pixels, the number being larger than a number of halftone levels that can be displayed by a single color pixel, wherein each said unit pixel is divided into three longitudinally elongated color pixels which are disposed laterally adjacently, and each color pixel is divided only in a longitudinal direction into said at least three sub-pixels having areal ratios such that at least one halftone level can be displayed by selecting one from at least two display patterns each formed by a combination of on-state and off-state of the sub-pixels.
- 26. An apparatus according to claim 25, further including an image processing circuit for converting data into binary data according to a dither method.
- 27. An apparatus according to claim 25, further including an image processing circuit for converting data into binary data by an error-diffusion method.
- 28. An apparatus according to claim 25, further including an image processing circuit for converting data into binary data by a density pattern method.
Priority Claims (1)
Number |
Date |
Country |
Kind |
5-271215 |
Oct 1993 |
JP |
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Parent Case Info
This is a continuation application, under 37 CFR 1.62 of prior application Ser. No. 08/318,299, filed on Oct. 5, 1994, currently entitled DISPLAY APPARATUS, now abandoned.
US Referenced Citations (9)
Foreign Referenced Citations (4)
Number |
Date |
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0219479 |
Apr 1987 |
EP |
5546783 |
Apr 1980 |
JP |
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Mar 1986 |
JP |
1267519 |
Oct 1989 |
JP |
Continuations (1)
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Number |
Date |
Country |
Parent |
08/318299 |
Oct 1994 |
US |
Child |
08/974551 |
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US |