Display and weighted dot rendering method

The invention relates to a display and an image data processing system. According to the arrangement of the display, two color dots having lower light intensity than the other two color dots in a white balance status are disposed on diagonal positions of the pixel group. Therefore, the display of the invention can improve the color balance in the pixel group to avoid visible dark vertical line. The image data processing system of the invention utilizes the weighted dot rendering device for pre-compressing data. We can expect that the video compressed data size or the video transmission speed is reduced accordingly to a ratio of ⅓ (¼ in the case of RGBW of 2×2 matrix arrangement because white (W) can be regenerated from the corresponding R, G, B), thus storage memory and transmission bandwidth can be reduced considerably without degrading the visual perception of the video quality on the proprietary VP display.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a display and an image data processing system.

2. Description of the Related Art

Conventional methods of video data compression are based to use non compressed video frame with a defined resolution to be compressed into compressed video format such as MPEG2, MPEG4, H.264. The disadvantage is that the compressed video data size and transmission speed depend on the initial uncompressed resolution of video frames. For Standard Definition Television (SDTV), the resolution is 720×RGB×480 and for High Definition Television (HDTV), the resolution is 1920×RGB×1080. For a given compression quality, the video compressed data size and video transmission speed of HDTV is much higher than SDTV, thus requiring more storage capacity and transmission bandwidth. Especially on mobile devise where the transmission of the third generation (3G) of mobile phone network is limited at the present 384 kbps (kilo bit per second), it is not possible to transmit QVGA of 320×RGB×240 compressed video at 30 frames per second using 384 kbps transmission rate.

Therefore, it is necessary to provide an image data processing system so as to solve the above problem.

Furthermore, in conventional display of RGB in 3×1 matrix or RGBW in 4×1 matrix, the darkest color in a white balance is the blue color which is usually aligned vertically so that dark vertical lines are easily visible. Therefore, it is necessary to rearrange the color dots in a display to minimize the visibility of the dark lines in a white balance caused by the blue color.

SUMMARY OF THE INVENTION

One objective of the present invention is to provide a display. The display comprises a plurality of pixel groups, each pixel group comprising a plurality of dots arranged in a predetermined identical matrix form, each pixel group having at least one first color dot, at least one second color dot, at least one third color dot and at least one fourth color dot, the pixel groups arranged in a matrix manner so as to form the display, wherein the first color dot and the second color dot have lower light intensity than the third color dot and the fourth color dot in a white balance status, the first color dot and the second color dot are disposed on diagonal positions of the predetermined identical matrix of the pixel group, and each color dot represents a luminance and a chrominance of a corresponding full color pixel data by grouping with neighboring dots to form a plurality of overlapping full color dynamics pixel groups.

In a white balance status, the red color dot and the blue color dot have lower light intensity than the green color dot and the white color dot. Besides, human eyes are disposed on a horizontal level so that human visual perception is more sensible on horizontal lines. On the other hand, human head as well as human eyes balls are easy to move up and down so that human visual perception is also more familiar with vertical lines. Therefore, the red color and blue color shall be arranged in diagonal line so that human perception tends to divide the darker diagonal line into horizontal and vertical components, thus the darker diagonal line is less sensible to human vision. Thus, the arrangement of the display can improve the color balance in the pixel group to avoid visible dark vertical line.

Another objective of the present invention is to provide an image data processing system. The image data processing system comprises a source device, a weighted dot rendering device, an encoding device, a decoding device. The source device is used to provide a first data of a first pixel arrangement. The weighted dot rendering device is used to convert the first data to a second data of a second pixel arrangement. The second pixel arrangement has a plurality of first color dots, a plurality of second color dots, a plurality of third color dots and a plurality of fourth color dots. Each dot of the second pixel arrangement represents a luminance and a chrominance of a corresponding full color pixel data by grouping with neighboring dots to form a plurality of overlapping full color dynamics pixel groups. The encoding device is used to encode the second data to a third data. The decoding device is used to decode the third data to the second data.

Therefore, the image data processing system of the invention utilizes the weighted dot rendering device for pre-compressing data. Besides, By utilizing the encoding device, for example MPEG4 or H.264 on this reduced video frame resolution, we can expect that the video compressed data size or the video transmission speed is reduced accordingly to a ratio of ⅓ (¼ in the case of RGBW of 2×2 matrix arrangement because white (W) can be regenerated from the corresponding R, G, B), thus storage memory and transmission bandwidth can be reduced considerably without degrading the visual perception of the video quality on the proprietary VP display.

DETAILED DESCRIPTION OF THE INVENTION

According to the invention, a display comprises a plurality of pixel groups. Each pixel group comprises a plurality of dots arranged in a predetermined identical matrix form. Each pixel group having at least one first color dot, at least one second color dot, at least one third color dot and at least one fourth color dot. The pixel groups arranged in a matrix manner so as to form the display. Wherein each color dot has a plurality of sides adjacent to the other dots with different color. The first color dot and the second color dot have lower light intensity than the third color dot and the fourth color dot in a white balance status. The first color dot and the second color dot are disposed on diagonal positions of the predetermined identical matrix of the pixel group. Each color dot represents a luminance and a chrominance of a corresponding full color pixel data by grouping with neighboring dots to form a plurality of overlapping full color dynamics pixel groups.

Referring toFIG. 1A, according to the invention, a display10A of a first embodiment comprises a plurality of pixel groups11. Each pixel group comprises four quadrate dots arranged in a 2×2 matrix. Each pixel groups11comprises a first color dot111(R), a second color dot112(B), a third color dot113(G) and a fourth color dot114(W). The first color dot111is a red dot (R), the second color dot112is a blue dot (B), and the third color dot113is a green dot (G). The fourth color dot114is a white color dot (W).

The first color dot111(R) and the second color dot112(B) have lower light intensity than the third color dot113(G) and the fourth color dot114(W) in a white balance status. Therefore, the first color dot111(R) and the second color dot112(B) are disposed on diagonal positions of the pixel group11. That is, the first color dot111(R) is disposed on a first column and a first row position of the pixel group11, and the second color dot112(B) is disposed on a second column and a second row position of the pixel group11.

In the other embodiment, the first color dot (R) may be disposed on a second column and a second row position of the pixel group, and the second color dot (B) may be disposed on a first column and a first row position of the pixel group, as shown inFIG. 2A. And, the third color dot (G) may be disposed on a first column and a second row position of the pixel group, and the fourth color dot (W) may be disposed on a second column and a first row position of the pixel group. Referring toFIG. 2B, the positions of the third color dot (G) and the fourth color dot (W) are changed, and the positions of the first color dot (R) and the second color dot (B) are the same as the arrangement inFIG. 2A.

Besides, the first color dot (R) may be disposed on a second column and a first row position of the pixel group, and the second color dot (B) may be disposed on a first column and a second row position of the pixel group, as shown inFIG. 2C. And, the third color dot (G) may be disposed on a first column and a first row position of the pixel group, and the fourth color dot (W) may be disposed on a second column and a second row position of the pixel group. Referring toFIG. 2D, the positions of the third color dot (G) and the fourth color dot (W) are changed, and the positions of the first color dot (R) and the second color dot (B) are the same as the arrangement inFIG. 2C.

Furthermore, the first color dot (R) may be disposed on a first column and a second row position of the pixel group, and the second color dot (B) may be disposed on a second column and a first row position of the pixel group, as shown inFIG. 2E. And, the third color dot (G) may be disposed on a first column and a second row position of the pixel group, and the fourth color dot (W) may be disposed on a second column and a first row position of the pixel group. Referring toFIG. 2F, the positions of the third color dot (G) and the fourth color dot (W) are changed, and the positions of the first color dot (R) and the second color dot (B) are the same as the arrangement inFIG. 2E.

Referring toFIG. 2G, the positions of the third color dot (G) and the fourth color dot (W) are changed, and the positions of the first color dot (R) and the second color dot (B) are the same as the arrangement inFIG. 1A.

Generally, in a white balance status, the red color dot and the blue color dot have lower light intensity than the green color dot and the white color dot. Besides, human eyes are disposed on a horizontal level so that human visual perception is more sensible on horizontal lines. On the other hand, human head as well as human eyes balls are easy to move up and down so that human visual perception is also more familiar with vertical lines. According to the invention, the first color dot111(R) and the second color dot113(B) with lower light intensity are disposed on diagonal positions of the pixel group11, and human visual perception tends to divide the lower light intensity of the first color dot111(R) and the second color dot113(B), arranged in diagonal line, into a horizontal component and a vertical component, thus the darker diagonal line is less sensible to human vision. Therefore, the arrangement of the display10A can improve the color balance in the pixel group to avoid visible dark vertical line. In conventional display of RGB in 3×1 matrix or RGBW in 4×1 matrix, the darkest color in a white balance is the blue color which is usually aligned vertically so that dark vertical lines are easily visible.

Referring toFIG. 3A, in the display10A shown inFIG. 1A, each color dot represents a luminance and a chrominance of a corresponding full color pixel data by grouping with neighboring dots to form a plurality of overlapping full color dynamics pixel groups. For example, a selected dot (G) is determined from the dots of the arrangement ofFIG. 1A. The selected dot (G) and three neighboring dots form an overlapping full color dynamics pixel group, and there are four overlapping full color dynamics pixel groups shown inFIG. 3A. A first overlapping full color dynamics pixel group comprises the selected dot (G), a left dot (B), a forward dot (R) and a left-forward dot (W); a second overlapping full color dynamics pixel group comprises the selected dot (G), a right dot (B), a forward dot (R) and a right-forward dot (W); a third overlapping full color dynamics pixel group comprises the selected dot (G), a left dot (B), a backward dot (R) and a left-backward dot (W); a fourth overlapping full color dynamics pixel group comprises the selected dot (G), a right dot (B), a backward dot (R) and a right-backward dot (W).

Referring toFIG. 1B, according to the invention, a display10B of a second embodiment comprises a plurality of pixel groups12. Each pixel group12comprises four quadrate dots arranged in a 2×2 matrix. Each pixel groups12comprises a first color dot121(R), a second color dot122(B), a third color dot123(G) and a fourth color dot124(G). The first color dot121is a red dot (R), the second color dot122is a blue dot (B), and the third color dot123and the fourth color dot124are green dots (G).

The first color dot121(R) and the second color dot122(B) have lower light intensity than the third color dot123(G) and the fourth color dot124(G) in a white balance status. Therefore, the first color dot121(R) and the second color dot122(B) are disposed on diagonal positions of the pixel group12. That is, the first color dot121(R) is disposed on a first column and a first row position of the pixel group12, and the second color dot122(B) is disposed on a second column and a second row position of the pixel group12.

In the other embodiment, the first color dot (R) may be disposed on a second column and a second row position of the pixel group, and the second color dot (B) may be disposed on a first column and a first row position of the pixel group, as shown inFIG. 2H. And, the third color dot (G) may be disposed on a first column and a second row position of the pixel group, and the fourth color dot (G) may be disposed on a second column and a first row position of the pixel group.

Besides, the first color dot (R) may be disposed on a second column and a first row position of the pixel group, and the second color dot (B) may be disposed on a first column and a second row position of the pixel group, as shown inFIG. 2I. And, the third color dot (G) may be disposed on a first column and a first row position of the pixel group, and the fourth color dot (G) may be disposed on a second column and a second row position of the pixel group. Furthermore, the first color dot (R) may be disposed on a first column and a second row position of the pixel group, and the second color dot (B) may be disposed on a second column and a first row position of the pixel group, as shown inFIG. 2J. And, the third color dot (G) may be disposed on a first column and a first row position of the pixel group, and the fourth color dot (G) may be disposed on a second column and a second row position of the pixel group.

Referring toFIG. 3B, in the display10B shown inFIG. 1B, each color dot represents a luminance and a chrominance of a corresponding full color pixel data by grouping with neighboring dots to form a plurality of overlapping full color dynamics pixel groups. For example, a selected dot (B) is determined from the dots of the arrangement ofFIG. 1B. The selected dot (B) and three neighboring dots form an overlapping full color dynamics pixel group, and there are four overlapping full color dynamics pixel groups shown inFIG. 3B. A first overlapping full color dynamics pixel group comprises the selected dot (B), a left dot (G), a forward dot (G) and a left-forward dot (R); a second overlapping full color dynamics pixel group comprises the selected dot (B), a right dot (G), a forward dot (G) and a right-forward dot (R); a third overlapping full color dynamics pixel group comprises the selected dot (B), a left dot (G), a backward dot (G) and a left-backward dot (R); a fourth overlapping full color dynamics pixel group comprises the selected dot (B), a right dot (G), a backward dot (G) and a right-backward dot (R).

Referring toFIG. 1C, according to the invention, a display10C of a third embodiment comprises a plurality of pixel groups13. Each pixel group13comprises four quadrate dots arranged in a 2×2 matrix. Each pixel groups13comprises a first color dot131(B), a second color dot132(B), a third color dot133(R) and a fourth color dot134(G). The first color dot131and the second color dot132are blue dots (B), the third color dot133is a red dot (R), and the fourth color dot134is a green dot (G).

The first color dot131(B) and the second color dot132(B) have lower light intensity than the third color dot133(R) and the fourth color dot134(G) in a white balance status. Therefore, the first color dot131(B) and the second color dot132(B) are disposed on diagonal positions of the pixel group13. That is, the first color dot131(B) is disposed on a second column and a first row position of the pixel group, and the second color dot132(B) is disposed on a first column and a second row position of the pixel group.

In the other embodiment, the first color dot (B) may be disposed on a second column and a first row position of the pixel group, and the second color dot (B) may be disposed on a first column and a second row position of the pixel group, as shown inFIG. 2K. And, the third color dot (R) may be disposed on a second column and a second row position of the pixel group, and the fourth color dot (G) may be disposed on a first column and a first row position of the pixel group.

Besides, the first color dot (B) may be disposed on a first column and a first row position of the pixel group, and the second color dot (B) may be disposed on a second column and a second row position of the pixel group, as shown inFIG. 2L. And, the third color dot (R) may be disposed on a second column and a first row position of the pixel group, and the fourth color dot (G) may be disposed on a first column and a second row position of the pixel group. Furthermore, referring toFIG. 2M, the first color dot (B) may be disposed on a first column and a first row position of the pixel group, and the second color dot (B) may be disposed on a second column and a second row position of the pixel group. And, the third color dot (R) may be disposed on a first column and a second row position of the pixel group, and the fourth color dot (G) may be disposed on a second column and a first row position of the pixel group.

Referring toFIG. 3C, in the display10C shown inFIG. 1C, each color dot represents a luminance and a chrominance of a corresponding full color pixel data by grouping with neighboring dots to form a plurality of overlapping full color dynamics pixel groups. For example, a selected dot (G) is determined from the dots of the arrangement ofFIG. 1C. The selected dot (G) and three neighboring dots form an overlapping full color dynamics pixel group, and there are four overlapping full color dynamics pixel groups shown inFIG. 3C. A first overlapping full color dynamics pixel group comprises the selected dot (G), a left dot (B), a forward dot (B) and a left-forward dot (R); a second overlapping full color dynamics pixel group comprises the selected dot (G), a right dot (B), a forward dot (B) and a right-forward dot (R); a third overlapping full color dynamics pixel group comprises the selected dot (G), a left dot (B), a backward dot (B) and a left-backward dot (R); a fourth overlapping full color dynamics pixel group comprises the selected dot (G), a right dot (B), a backward dot (B) and a right-backward dot (R).

Referring toFIG. 1D, according to the invention, a display10D of a fourth embodiment comprises a plurality of pixel groups14. Each pixel group comprises four quadrate dots arranged in a 2×2 matrix. Each pixel groups14comprises a first color dot141(A), a second color dot142(B), a third color dot143(C) and a fourth color dot144(D). The first color dot141, the second color dot142, the third color dot143and the fourth color dot144do not be limited to any color.

If the first color dot141(A) and the second color dot142(B) have lower light intensity than the third color dot143(C) and the fourth color dot144(D) in a white balance status, the first color dot141(A) and the second color dot142(B) are disposed on diagonal positions of the pixel group14. That is, the first color dot141(A) is disposed on a first column and a first row position of the pixel group14, and the second color dot142(B) is disposed on a second column and a second row position of the pixel group14.

Referring toFIG. 4A, according to the invention, a display40A of a fifth embodiment comprises a plurality of pixel groups41. Each pixel group comprises four quadrate dots with curved comers arranged in a 2×2 matrix. Each pixel groups41comprises a first color dot411(R), a second color dot412(B), a third color dot413(G) and a fourth color dot414(W). Similarly to the first embodiment, the first color dot411(R) and the second color dot412(B) are disposed on diagonal positions of the pixel group41. In the fifth embodiment of the invention, the color dots are quadrate shape with curved comers so as to smooth out the saw tooth influence in oblique line caused by quadrate shape as shown inFIG. 1A. Furthermore, the curved comers of the display40A can increase the contrast without sacrificing too much the luminance.

Referring toFIG. 4B, according to the invention, a display40B of a sixth embodiment comprises a plurality of pixel groups42. Each pixel group comprises four octagonal dots arranged in a 2×2 matrix. Each octagonal dot has eight sides with uneven length. The length of the sides on the corner is shorter than that on the center. Each pixel groups42comprises a first color dot421(R), a second color dot422(B), a third color dot423(G) and a fourth color dot424(W). Similarly to the first embodiment, the first color dot421(R) and the second color dot422(B) are disposed on diagonal positions of the pixel group42. In the sixth embodiment of the invention, the octagonal dots have eight sides with shorter corner sides so as to smooth out the saw tooth influence in oblique line caused by quadrate shape as shown inFIG. 1A. Furthermore, the shorter corner sides of the display40B can increase the contrast without sacrificing too much the luminance.

Referring toFIG. 5, according to the invention, an image data processing system50comprises: a source device51, a weighted dot rendering device52, an encoding device53, a transmitting device54, a receiving device55, a decoding device58and a display59. The source device51is utilized for obtaining a first data of a first pixel arrangement. The first arrangement may have a plurality of conventional RGB groups, each RGB group has a red color dot, a green color dot and a blue color dot. The first data represent the color dots of the conventional RGB groups.

The source device51may be a sensor for obtaining the first data the first pixel arrangement. The source device51may be a media player for providing the first data of the first pixel arrangement. The source device51may provide the first data of the first pixel arrangement from a wire device, for example a TV cable, or a wireless device, for example a broadcasting system.

The weighted dot rendering device52is used for converting the first data to a second data of a second pixel arrangement. The second pixel arrangement has a plurality of first color dots, a plurality of second color dots, a plurality of third color dots and a plurality of fourth color dots, for example, the second pixel arrangement may be the display10A as shown inFIG. 1A. Each dot of the second pixel arrangement represents a luminance and a chrominance of a corresponding full color pixel data by grouping with neighboring dots to form a plurality of overlapping full color dynamics pixel groups. The weighted dot rendering device52utilizes a weighted dot rendering method for converting the first data to the second data of the second pixel arrangement, and the weighted dot rendering method can refer to U.S. patent application Ser. Nos. 10/727,545 and 11/012,202. Therefore, the data amount of the second data can be reduced to ⅓ (¼ in the case of RGBW of 2×2 matrix arrangement because white (W) can be regenerated from the corresponding R, G, B) of the data amount of the first data.

The weighted dot rendering device52can directly convert the first data to the second data of the second pixel arrangement. Besides, the weighted dot rendering device52can firstly convert the first data to a fourth data of a fourth pixel arrangement, then convert the fourth data of the fourth pixel arrangement to the second data of the second data. The fourth pixel arrangement may have a plurality of conventional RGBW groups without overlapping full color dynamics pixel groups, each RGBW group has a red color dot, a green color dot, a blue color dot and a white color dot. The fourth data represent the color dots of the conventional RGBW groups. Therefore, the weighted dot rendering device52comprises a first converter521and a second converter522. The first converter521is used for converting the first data to the fourth data, and the second converter522is used for converting the fourth data to the second data.

The encoding device53is utilizes for encoding the second data to a third data. The encoding device53may be a compression device for compressing the second data to the third data, for example MPEG type data. Therefore, the weighted dot rendering device52is a pre-compression device for compressing the first data to the second data before the encoding device53, and the resolution do not change.

The transmitting device54is used for transmitting the third data. Because the data amount of the second data is ⅓ (¼ in the case of RGBW of 2×2 matrix arrangement because white (W) can be regenerated from the corresponding R, G, B) of the data amount of the first data, the transmitting device54can transmit more data by less bandwidth. The receiving device55is used for receiving the third data from the transmitting device54. The decoding device58is used for decoding the third data from the receiving device55to the second data.

The image data processing system50further comprises a storage device56for storing the third data. Because the data amount of the second data is ⅓ (¼ in the case of RGBW of 2×2 matrix arrangement because white (W) can be regenerated from the corresponding R, G, B) of the data amount of the first data, the storage device56can store more data by less space. The image data processing system50further comprises an access device57for retrieving the third data from the storage device56. The decoding device58can be used for decoding the third data from the access device57to the second data. The display59is used for displaying the second data.

Therefore, the image data processing system of the invention utilizes the weighted dot rendering device52for pre-compressing data. Besides, By utilizing the encoding device, for example MPEG4 or H.264 on this reduced video frame resolution, we can expect that the video compressed data size or the video transmission speed is reduced accordingly to a ratio of ⅓ (¼ in the case of RGBW of 2×2 matrix arrangement because white (W) can be regenerated from the corresponding R, G, B), thus storage memory and transmission bandwidth can be reduced considerably without degrading the visual perception of the video quality on the proprietary VP display.

While an embodiment of the present invention has been illustrated and described, various modifications and improvements can be made by those skilled in the art. The embodiment of the present invention is therefore described in an illustrative, but not restrictive, sense. It is intended that the present invention may not be limited to the particular forms as illustrated, and that all modifications which maintain the spirit and scope of the present invention are within the scope as defined in the appended claims.