Display device and signal converting device

• US 9,928,786 B2
• Filed: 10/12/2007
• Issued: 03/27/2018
• Est. Priority Date: 10/13/2006
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Miyazaki, Akiko, Tomizawa, Kazunari, Nakamura, Kozo, Ueki, Shun
• Primary Examiner(s): PIZIALI, JEFFREY J
• Application Number:
  US12/445,242
• Publication Number:
  US 20100026728A1
• Time in Patent Office: 3,819 Days
• Field of Search: 345 88, 345 95, 345 96, 345 98, 345100, 345103, 345690
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2340/0457 Improvement of perceived resolution by subpixel rendering
• CPC Class Codes: G09G 2340/06 Colour space transformation
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/36 using liquid crystals
• CPC Class Codes: G09G 3/3614 Control of polarity reversal in general

Abstract

A display device includes a multi-primary-color display panel with subpixels arranged in a matrix pattern of columns and rows; and a signal converter arranged to convert a video signal, having values that represent the colors of pixels with a matrix pattern, into a multi-primary-color signal for use in the multi-primary-color display panel. The signal converter associates a value of the video signal representing the color of at least one of pixels on a p^th row with values of the multi-primary-color signal corresponding to the luminances of subpixels on (s−1)^th and s^th rows, and also associates a value of the video signal representing the color of at least one of the pixels on a (p+1)^th row with values of the multi-primary-color signal corresponding to the luminances of subpixels on s^th and (s+1)^th rows.

Claims

1. A display device comprising:

a multi-primary-color display panel including multiple display subpixels that are arranged in columns and rows, wherein in a series of L columns of subpixels of the multiple display subpixels, where L is a natural number that is equal to or greater than two, multiple sets of subpixels in the series of L columns of subpixels are provided in first and second different combinations and are arranged alternately, each of the multiple sets of subpixels in the series of L columns of subpixels including L subpixels that are arranged in a direction that is parallel with the rows of the multiple display subpixels; and

a signal converter arranged and programmed to convert a video signal, having values that represent colors of pixels in a matrix pattern, into a multi-primary-color signal provided to drive the multiple display subpixels in the multi-primary-color display panel;

wherein

the signal converter is arranged and programmed to drive the multi-primary-color display panel with the multi-primary-color signal based on a value of the video signal representing a color of at least one of the pixels in the matrix pattern in a p^th row of the matrix pattern, where p is any whole number, to generate, based on at least one of a look up table and a predetermined equation, values of the multi-primary-color signal that control luminances of subpixels of the multiple display subpixels positioned on (s−

1)^th and s^th rows of the rows of the multiple display subpixels, where s is any whole number, and also based on a value of the video signal representing a color of at least one of the pixels in the matrix pattern in a (p+1)^th row of the matrix pattern to generate, based on at least one of the look up table and the predetermined equation, values of the multi-primary-color signal that control luminances of subpixels of the multiple display subpixels positioned on the s^th row and a (s+1)^th row of the rows of the multiple display subpixels.

2. The display device of claim 1, wherein the multi-primary-color display panel has a different vertical resolution from the video signal, and the signal converter is arranged and programmed to perform multi-primary-color conversion and vertical resolution conversion on the values of the video signal representing colors of the pixels in the matrix pattern such that the values are input to drive the multi-primary-color display panel.

3. The display device of claim 2, wherein the video signal has a vertical resolution of 2M, where M is any whole number, that is equal to a total number of rows of the pixels in the matrix pattern, the multi-primary-color display panel has M sets of the subpixels in the series of L columns of subpixels in the first different combination and M sets of the subpixels in the series of L columns of subpixels in the second different combination that are arranged alternately in a direction that is parallel with the columns of the multiple display subpixels and also has a nominal vertical resolution of M, and the signal converter is arranged and programmed to convert the video signal with the vertical resolution of 2M into the multi-primary-color signal input to drive the multiple display subpixels in the multi-primary-color display panel, the multi-primary-color signal having the nominal vertical resolution of M.

4. The display device of claim 1, wherein in a certain one of the columns of the multiple display subpixels, one of the L subpixels included in a set of the multiple sets of subpixels in the first different combination and one of the L subpixels included in a set of the multiple sets of subpixels in the second different combination are arranged alternately in a direction that is parallel with the columns of the multiple display subpixels.

5. The display device of claim 1, wherein in a certain one of the rows of the multiple display subpixels, a set of the multiple sets of subpixels in either one of the first or second different combinations is arranged in the direction that is parallel with the rows of the multiple display subpixels.

6. The display device of claim 5, wherein the L subpixels in a certain one of the rows of the multiple display subpixels belong to a set of the multiple sets of subpixels in either one of the first or second different combinations, are arranged periodically in the direction that is parallel with the rows of the multiple display subpixels.

7. The display device of claim 5, wherein the video signal has a horizontal resolution of 2H, H being any whole number, that is equal to a total number of columns of the pixels in the matrix pattern, in a certain one of the rows of the multiple display subpixels, a set of 2H subpixels of the multiple sets of subpixels in either one of the first or second different combinations is arranged in the direction that is parallel with the rows of the multiple display subpixels, and a value of the video signal representing colors of a specific column of the columns of the pixels in the matrix pattern is used to generate, based on at least one of the look up table and the predetermined equation, values of the multi-primary-color signal that control luminances of the L columns of subpixels.

8. The display device of claim 7, wherein a value of the video signal representing a color of a pixel of the pixels in the matrix pattern at an intersection between the p^th row of the matrix pattern and a q^th column of the matrix pattern, q being any whole number, is used to generate, based on at least one of the look up table and the predetermined equation, values of the multi-primary-color signal that control luminances of a series of L subpixels of the multiple display subpixels in the (s−

1)^th row of the rows of the multiple display subpixels, including one subpixel of the series of L subpixels of the multiple display subpixels on the (s−

1)^th row at an intersection between the (s−

1)^th row and a t^th column of the columns of the multiple display subpixels, t being any whole number, and another series of L subpixels of the multiple display subpixels in the s^th row of the rows of the multiple display subpixels, including one subpixel of the series of L subpixels of the multiple display subpixels on the s^th row at an intersection between the s^th row and the t^th column.

9. The display device of claim 8, wherein the value of the video signal representing the color of the pixel at the intersection between the p^th row and the q^th column of the matrix pattern is used to generate, based on at least one of the look up table and the predetermined equation, values of the multi-primary-color signal that control luminances of subpixels of the multiple display subpixels in (p−

1)^th and p^th rows of the rows of the multiple display subpixels and on {L×

(q−

1)+1}^th through (L×

q)^th columns of the columns of the multiple display subpixels, and wherein a value of the video signal representing the color of a pixel of the pixels in the matrix pattern at an intersection between the (p+1)^th row and the q^th column is used to generate, based on at least one of the look up table and the predetermined equation, values of the multi-primary-color signal that control the luminances of subpixels of the multiple display subpixels in the p^th and (p+1)^th rows and in the {L×

(q−

1)+1}^th through (L×

q)^th columns.

10. The display device of claim 1, wherein at least one subpixel of the multiple display subpixels included in each of the multiple sets of the subpixels in the first different combination displays a same color as at least one subpixel of the multiple display subpixels included in each of the multiple sets of the subpixels in the second different combination.

11. The display device of claim 10, wherein

L is equal to 3, and

each of the multiple sets of the subpixels in the first different combination includes a first red subpixel, a yellow subpixel, and a blue subpixel, and each of the multiple sets of the subpixels in the second different combination includes a second red subpixel, a green subpixel, and a cyan subpixel.

12. The display device of claim 5, wherein the video signal has a horizontal resolution of 2H, H being any whole number, that is equal to a total number of columns of the pixels in the matrix pattern, on a certain row of the rows of the multiple display subpixels, a set of H subpixels of the multiple sets of subpixels in either one the first or second different combinations is arranged in the direction that is parallel with the rows of the multiple display subpixels, the multi-primary-color display panel has a nominal horizontal resolution of H, and the signal converter is arranged and programmed to convert the video signal with the horizontal resolution of 2H into the multi-primary-color signal used to drive the multiple display subpixels in the multi-primary-color display panel, the multi-primary-color signal having the nominal horizontal resolution of H.

13. The display device of claim 12, wherein a value of the video signal representing a color of a pixel of the pixels in the matrix pattern at an intersection between the p^th row of the matrix pattern and a q^th column of the matrix pattern, q being any whole number, is used to generate, based on at least one of the look up table and the predetermined equation, values of the multi-primary-color signal that control luminances of subpixels in the (s−

1)^th row of the rows of the multiple display subpixels, including one subpixel of the subpixels in the (s−

1)^th row at an intersection between the (s−

1)^th row and a t^th column of the columns of the multiple display subpixels, t being any whole number, and subpixels of the multiple display subpixels in the s^th row of the rows of the multiple display subpixels, including one subpixel of the subpixels in the s^th row at an intersection between the s^th row and the t^th column, and a value of the video signal representing the color of a pixel of the pixels in the matrix pattern at an intersection between a (p+1)^th row of the matrix pattern and the q^th column of the matrix pattern is used to generate, based on at least one of the look up table and the predetermined equation, values of the multi-primary-color signal that control luminances of subpixels on the s^th row, including the one subpixel at the intersection between the s^th row and the t^th column, and subpixels of the multiple display subpixels on an (s+1)^th row, including one subpixel of the subpixels in the (s+1)^th row at an intersection between the (s+1)^th row and the t^th column.

14. The display device of claim 12, wherein a value of the video signal representing a color of a pixel of the pixels in the matrix pattern at an intersection between the p^th row of the matrix pattern and a q^th column of the matrix pattern, q being any whole number, is used to generate, based on at least one of the look up table and the predetermined equation, values of the multi-primary-color signal that control luminances of a series of L subpixels of the multiple display subpixels in an (s−

1)^th row of the rows of the multiple display subpixels and another series of L subpixels of the multiple display subpixels in an s^th row of the rows of the multiple display subpixels, and a value of the video signal representing a color of a pixel of the pixels in the matrix pattern at an intersection between a (p+1)^th row of the matrix pattern and the q^th column is used to generate, based on at least one of the look up table and the predetermined equation, values of the multi-primary-color signal that control luminances of the series of L subpixels on the s^th row and yet another series of L subpixels of the multiple display subpixels in an (s+1)^th row of the rows of the multiple display subpixels.

15. The display device of claim 12, wherein a value of the video signal representing a color of a pixel of the pixels in the matrix pattern at an intersection between the p^th row of the matrix pattern and a q^th column of the matrix pattern, q being any whole number, is used to generate, based on at least one of the look up table and the predetermined equation, values of the multi-primary-color signal that control luminances of less than L subpixels of the multiple display subpixels in an (s−

1)^th row of the rows of the multiple display subpixels and less than L subpixels of the multiple display subpixels in an s^th row of the rows of the multiple display subpixels, and a value of the video signal representing a color of a pixel in the matrix pattern at an intersection between the (p+1)^th row of the matrix pattern and the q^th column of the matrix pattern is used to generate, based on at least one of the look up table and the predetermined equation, values of the multi-primary-color signal that control luminances of the less than L subpixels in the s^th row and less than L subpixels in an (s+1)^th row of the rows of the multiple display subpixels.

16. The display device of claim 12, wherein a value of the video signal representing a color of a pixel of the pixels in the matrix pattern at an intersection between the p^th row of the matrix pattern and a q^th column of the matrix pattern, q being any whole number, is used to generate, based on at least one of the look up table and the predetermined equation, values of the multi-primary-color signal that control luminances of more than L subpixels of the multiple display subpixels in an (s−

1)^th row of the rows of the multiple display subpixels and more than L subpixels of the multiple display subpixels on an s^th row of the rows of the multiple display subpixels, and a value of the video signal representing a color of a pixel at an intersection between a (p+1)^th row of the matrix pattern and the q^th column of the matrix pattern is used to generate, based on at least one of the look up table and the predetermined equation, values of the multi-primary-color signal that control luminances of the more than L subpixels on the s^th row and more than L subpixels of the multiple display subpixels on an (s+1)^th row of the rows of the multiple display subpixels.

17. The display device of claim 1, wherein the subpixels of the multiple display subpixels included in each of the multiple sets of subpixels in the first different combination represent a different color from the subpixels of the multiple display subpixels included in each of the multiple sets of subpixels in the second different combination.

18. The display device of claim 17, wherein

L is equal to 2, and

each of the multiple sets of subpixels in the first different combination includes a red subpixel and a green subpixel, and each of the multiple sets of subpixels in the second different combination includes a blue subpixel and a yellow subpixel.

19. The display device of claim 1, wherein

the video signal is an interlaced signal,

in odd-numbered fields, the (s−

1)^th and the s^th rows of the rows of the multiple display subpixels of the multi-primary-color display panel have luminances that are controlled by values of the video signal representing colors of pixels on the p^th row of the matrix pattern, and

in even-numbered fields, the s^th and the (s+1)^th rows of the rows of the multiple display subpixels of the multi-primary-color display panel have luminances that are controlled by values of the video signal representing colors of pixels on a (p+1)^th row.

20. The display device of claim 19, wherein in each of the odd-numbered and even-numbered fields, (2w−

1)^th and 2w^th rows of the rows of the multiple display subpixels, w being any whole number, have a same polarity but 2w^th and (2w+1)^th rows of the rows of the multiple display subpixels have mutually different polarities, and in each of the odd-numbered and even-numbered fields, subpixels of the multiple display subpixels that are adjacent to each other in the direction that is parallel with the rows of the multiple display subpixels have mutually different polarities.

21. The display device of claim 19, wherein each of the multiple display subpixels of the multi-primary-color display panel has its polarity inverted every field.

22. The display device of claim 1, wherein the video signal is a progressive signal, and the s^th row of the rows of the multiple display subpixels of the multi-primary-color display panel exhibit luminances that have been obtained based on values of the video signal representing the colors of the pixels in the matrix pattern that are in the p^th and the (p+1)^th rows of the matrix pattern.

23. The display device of claim 22, wherein the signal converter is arranged and programmed to determine values of the multi-primary-color signal used to control luminances of the s^th row of the rows of the multiple display subpixels using a result of a multi-primary-color conversion that has been performed on the values of the video signal representing the colors of the pixels in the matrix pattern in the p^th and (p+1)^th rows of the matrix pattern.

24. The display device of claim 23, wherein

at least one of the subpixels of the multiple display subpixels included in each of the multiple sets of subpixels in the first different combination displays a same color as at least one of the subpixels of the multiple display subpixels included in each of the multiple sets of subpixels in the second different combination, and

the signal converter is arranged and programmed to determine a value that controls a luminance of the at least one subpixel of the multiple display subpixels that displays the same color among subpixels on an x^th row of the rows of the multiple display subpixels, x being any whole number, using a result of a multi-primary-color conversion that has been performed on a value of the video signal representing colors of pixels in the matrix pattern in an x^th row of the matrix pattern.

25. The display device of claim 22, wherein the signal converter is arranged and programmed to obtain a value representing colors of a single row of pixels in the matrix pattern, comprised of two rows of the rows of the multiple display subpixels in the multi-primary-color display panel, using values of the video signal representing colors of at least two rows of pixels in the matrix pattern that are adjacent to each other in a direction that is parallel with columns of the matrix pattern, and also using the value representing the colors of the single row of pixels in the matrix pattern, to perform a multi-primary-color conversion, the multi-primary-color conversion being used to generate, based on at least one of the look up table and the predetermined equation, values of the multi-primary-color signal that control luminances of subpixels of the two rows of the rows of the multiple display subpixels.

26. The display device of claim 25, wherein the signal converter is arranged and programmed to obtain a value representing colors of a single row of pixels in the matrix pattern, comprised of (2w−

1)^th and 2w^th rows of the rows of the multiple display subpixels in the multi-primary-color display panel, w being any whole number, using values of the video signal representing colors of (2w−

2)^th, (2w−

1)^th and 2w^th rows of pixels in the matrix pattern, and to subject the value representing the colors of the single row of pixels in the matrix pattern to a multi-primary-color conversion, the multi-primary-color conversion being used to generate, based on at least one of the look up table and the predetermined equation, values of the multi-primary-color signal that controls luminances of subpixels of the (2w−

1)^th and 2w^th rows of the rows of the multiple display subpixels.