Color filter substrate, array substrate, and display panel and display apparatus having the same

• US 9,825,064 B2
• Filed: 04/06/2016
• Issued: 11/21/2017
• Est. Priority Date: 07/03/2015
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd., Chengdu BOE Optoelectronics Technology Company Limited (BOE Technology Group Co., Ltd.)
• Original Assignee: BOE Technology Group Co., Ltd., Chengdu BOE Optoelectronics Technology Company Limited (BOE Technology Group Co., Ltd.)
• Inventors: Dong, Xiangdan, Huang, Weiyun
• Primary Examiner(s): McCall Shepard, Sonya D
• Application Number:
  US15/302,912
• Publication Number:
  US 20170213850A1
• Time in Patent Office: 594 Days
• CPC Class Codes: G02B 5/201 in the form of arrays
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/134345 Subdivided pixels, e.g. for grey scale or redundancy
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 2201/123 pixel
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs
• CPC Class Codes: H10K 59/351 comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
• CPC Class Codes: H10K 59/352 the areas of the RGB subpixels being different
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]

Abstract

The present application discloses a display panel comprising an array of pixel units, each pixel unit comprising a red sub-pixel, a green sub-pixel, and a blue sub-pixel; the red sub-pixel comprising a red light emitting portion; the green sub-pixel comprising a green light emitting portion; and the blue sub-pixel comprising a blue light emitting portion; at least one of the red sub-pixel, the green sub-pixel, and the blue sub-pixel comprising a white light emitting portion for enhancing brightness of the at least one sub-pixel. A first white color coordinate and a second white color coordinate are substantially the same. The first white color coordinate is a white color coordinate of combined light of light emitted from the red sub-pixel, the green sub-pixel, and the blue sub-pixel. The second white color coordinate is a white color coordinate of combined light of light emitted from equal area units of the red light emitting portion, the green light emitting portion, and the blue light emitting portion.

Claims

1. A display panel, comprising an array of pixel units, each pixel unit comprising a red sub-pixel, a green sub-pixel, and a blue sub-pixel;

the red sub-pixel comprising a first pixel electrode;

the green sub-pixel comprising a second pixel electrode; and

the blue sub-pixel comprising a third pixel electrode;

wherein the red sub-pixel comprises a red light emitting region configured to emit red light and a first white light emitting region configured to emit white light;

the green sub-pixel comprises a green light emitting region configured to emit green light and a second white light emitting region configured to emit white light;

the blue sub-pixel comprises a blue light emitting region configured to emit blue light and a third white light emitting region configured to emit white light;

a projection on the display panel of the first pixel electrode substantially overlaps with that of the red light emitting region resulting in an overlapping area A_R and with that of the first white light emitting region resulting in an overlapping area B_R;

a projection on the display panel of the second pixel electrode substantially overlaps with that of the green light emitting region resulting in an overlapping area A_G and with that of the second white light emitting region resulting in an overlapping area B_G; and

a projection on the display panel of the third pixel electrode substantially overlaps with that of the blue light emitting region resulting in an overlapping area A_B and with that of the third white light emitting region resulting in an overlapping area B_B;

A_R;

A_G;

A_B is substantially the same as α

_R;

α

_G;

α

_B;

B_R;

B_G;

B_B is substantially the same as β

_R;

β

_G;

β

_B;

(α

_R+β

_R), (α

_G+β

_G), and (α

_B+β

_B) are substantially equal to 1; and

one or more of α

_R, α

_G and α

_B is a known parameter.

2. The display panel of claim 1,

wherein the red sub-pixel comprises a red color filter in the red light emitting region and a first white color filter in the first white light emitting region, the green sub-pixel comprises a green color filter in the green light emitting region and a second white color filter in the second white light emitting region, the blue sub-pixel comprises a blue color filter in the blue light emitting region and a third white color filter in the third white light emitting region.

3. The display panel of claim 1, wherein

the first pixel electrode comprises a first pixel sub-electrode and a second pixel sub-electrode spaced apart from each other, the second pixel electrode comprises a third pixel sub-electrode and a fourth sub-electrode spaced apart from each other, the third pixel electrode comprises a fifth pixel sub-electrode and a sixth pixel sub-electrode spaced apart from each other;

a projection on the display panel of the first pixel sub-electrode substantially overlaps with that of the red light emitting region resulting in the overlapping area A_R;

a projection on the display panel of the second pixel sub-electrode substantially overlaps with that of the first white light emitting region resulting in the overlapping area B_R;

a projection on the display panel of the third pixel sub-electrode substantially overlaps with that of the green light emitting region resulting in the overlapping area A_G;

a projection on the display panel of the fourth pixel sub-electrode substantially overlaps with that of the second white light emitting region resulting in the overlapping area B_G; and

a projection on the display panel of the fifth pixel sub-electrode substantially overlaps with that of the blue light emitting region resulting in an overlapping area A_B; and

a projection on the display panel of the sixth pixel sub-electrode substantially overlaps with that of the third white light emitting region resulting in the overlapping area B_B.

4. The display panel of claim 1,

wherein the red sub-pixel comprises a red emitting layer in the red light emitting region and a first white light emitting layer in the first white light emitting region, the green sub-pixel comprises a green emitting layer in the green light emitting region and a second white light emitting layer in the second white light emitting region, the blue sub-pixel comprises a blue emitting layer in the blue light emitting region and a third white light emitting layer in the third white light emitting region.

5. The display panel of claim 1, wherein the first pixel electrode is an integral pixel electrode, the second pixel electrode is an integral pixel electrode, and the third pixel electrode is an integral pixel electrode.

6. A display apparatus, comprising the display panel according to claim 1.

7. The display panel of claim 1, wherein the display panel is a liquid crystal display panel.

8. The display panel of claim 2, wherein at least one of the red color filter, the green color filter, and the blue color filter is a rectangle with a protrusion at a corner.

9. The display panel of claim 2, wherein at least one of the red color filter, the green color filter, and the blue color filter is a rectangle with a cut-out at a corner.

10. The display panel of claim 2, wherein

the projection on the display panel of the first pixel electrode substantially overlaps with that of the red color filter resulting in the overlapping area A_R and with that of the first white color filter resulting in the overlapping area B_R;

the projection on the display panel of the second pixel electrode substantially overlaps with that of the green color filter resulting in the overlapping area A_G and with that of the second white color filter resulting in the overlapping area B_G; and

the projection on the display panel of the third pixel electrode substantially overlaps with that of the blue color filter resulting in the overlapping area A_B and with that of the third white color filter resulting in the overlapping area B_B.

11. The display panel of claim 3, further comprising a plurality of single gate lines and a plurality of data lines crossing over each other, defining a plurality of sub-pixels;

each sub-pixel comprises a first thin film transistor and a second thin film transistor, and are adjacent to a first adjacent gate line on a first side of the each sub-pixel and a second adjacent gate line on a second side of the each sub-pixel;

a gate electrode of the first thin film transistor is electrically connected to the first adjacent gate line;

a gate electrode of the second thin film transistor is electrically connected to the second adjacent gate line;

a source electrode of the first thin film transistor is electrically connected to a first data line;

a source electrode of the second thin film transistor is electrically connected to a second data line; and

drain electrodes of the first thin film transistor and the second thin film transistor are electrically connected to two sub-electrodes of a same pixel electrode; and

a drain electrode of the second thin film transistor is electrically connected to a second pixel sub-electrode.

12. The display panel of claim 3, further comprising a plurality of gate lines and a plurality of data lines crossing over each other, defining a plurality of sub-pixels;

wherein two adjacent gate lines are between two adjacent rows of sub-pixels;

each sub-pixel comprises a first thin film transistor and a second thin film transistor, and are adjacent to a first adjacent gate line on a first side of the each sub-pixel and a second adjacent gate line on a second side of the each sub-pixel;

a gate electrode of the first thin film transistor is electrically connected to the first adjacent gate line;

a gate electrode of the second thin film transistor is electrically connected to the second adjacent gate line;

a source electrode of the first thin film transistor is electrically connected to a first data line;

a source electrode of the second thin film transistor is electrically connected to a second data line; and

drain electrodes of the first thin film transistor and the second thin film transistor are electrically connected to two sub-electrodes of a same pixel electrode; and

a drain electrode of the second thin film transistor is electrically connected to a second pixel sub-electrode.

13. The display panel of claim 5, further comprising a plurality of single gate lines and a plurality of data lines crossing over each other, defining a plurality of sub-pixels within each pixel unit;

each sub-pixel comprises a single thin film transistor, the gate electrode of the single thin film transistor is electrically connected to a single gate line corresponding to the sub-pixel, the source electrode of the single thin film transistor is electrically connected to the date line corresponding to the sub-pixel, and the drain electrode of the thin film transistor is electrically connected to a pixel electrode; and

each data line has a shape compatible with the shape of a corresponding pixel electrode.

14. A color filter substrate, comprising an array of pixel units, each pixel unit comprising a red sub-pixel area, a green sub-pixel area, and a blue sub-pixel area;

wherein the red sub-pixel area comprises a red color filter and a first white color filter, the green sub-pixel area comprises a green color filter and a second white color filter, the blue sub-pixel area comprises a blue color filter and a third white color filter; and

the red color filter has an area A_R, the first white color filter has an area B_R, the green sub-pixel area has an area A_G, the second white color filter has an area B_G, the blue sub-pixel area has an area A_B, the third white color filter has an area B_B;

A_R;

A_G;

A_B is substantially the same as α

_R;

α

_G;

α

_B;

B_R;

B_G;

B_B is substantially the same as β

_R;

β

_G;

β

_B;

(α

_R+β

_R), (α

_G+β

_G), and (α

_B+β

_B) are substantially equal to 1; and

one or more of α

_R, α

_G and α

_B is a known parameter.

15. The color filter substrate of claim 14, wherein the first white color filter, the second white color filter, and the third white color filter constitute a single integral white color filter.

16. An array substrate, comprising an array of pixel units, each pixel unit comprising a red sub-pixel area, a green sub-pixel area, and a blue sub-pixel area;

the red sub-pixel area comprising a first pixel electrode;

the green sub-pixel area comprises a second pixel electrode; and

the blue sub-pixel area comprises a third pixel electrode;

wherein the red sub-pixel area comprises a red light emitting region configured to emit red light and a first white light emitting region configured to emit white light, the green sub-pixel area comprises a green light emitting region configured to emit green light and a second white light emitting region configured to emit white light, the blue sub-pixel area comprises a blue light emitting region configured to emit blue light and a third white light emitting region configured to emit white light;

a projection on the array substrate of the first pixel electrode substantially overlaps with that of the red light emitting region resulting in an overlapping area A_R and with that of the first white light emitting region resulting in an overlapping area B_R;

a projection on the array substrate of the second pixel electrode substantially overlaps with that of the green light emitting region resulting in an overlapping area A_G and with that of the second white light emitting region resulting in an overlapping area B_G; and

a projection on the array substrate of the third pixel electrode substantially overlaps with that of the blue light emitting region resulting in an overlapping area A_B and with that of the third white light emitting region resulting in an overlapping area B_B; and

A_R;

A_G;

A_B is substantially the same as α

_R;

α

_G;

α

_B;

B_R;

B_G;

B_B is substantially the same as β

_R;

β

_G;

β

_B;

(α

_R+β

_R), (α

_G+β

_G), and (α

_B+β

_B) are substantially equal to 1; and

one or more of α

_R, α

_G and α

_B is a known parameter.

17. The array substrate of claim 16, wherein the red sub-pixel area comprises a red light emitting layer in the red light emitting region and a first white light emitting layer in the first white light emitting region, the green sub-pixel area comprises a green light emitting layer in the green light emitting region and a second white light emitting layer in the second white light emitting region, the blue sub-pixel area comprises a blue light emitting layer in the blue light emitting region and a third white light emitting layer in the third white light emitting region.

18. The array substrate of claim 16, further comprising:

a projection on the array substrate of the first pixel electrode substantially overlaps with that of the red light emitting layer resulting in the overlapping area A_R and with that of the first white light emitting layer resulting in the overlapping area B_R;

a projection on the array substrate of the second pixel electrode substantially overlaps with that of the green light emitting layer resulting in the overlapping area A_G and with that of the second white light emitting layer resulting in the overlapping area B_G; and

a projection on the array substrate of the third pixel electrode substantially overlaps with that of the blue light emitting layer resulting in the overlapping area A_B and with that of the third white light emitting layer resulting in the overlapping area B_B.

19. The array substrate of claim 16, wherein

the first pixel electrode comprises a first pixel sub-electrode and a second pixel sub-electrode spaced apart from each other, the second pixel electrode comprises a third pixel sub-electrode and a fourth sub-electrode spaced apart from each other, the third pixel electrode comprises a fifth pixel sub-electrode and a sixth pixel sub-electrode spaced apart from each other;

a projection on the array substrate of the first pixel sub-electrode substantially overlaps with that of the red light emitting region resulting in the overlapping area A_R;

a projection on the array substrate of the second pixel sub-electrode substantially overlaps with that of the first white light emitting region resulting in the overlapping area B_R;

a projection on the array substrate of the third pixel sub-electrode substantially overlaps with that of the green light emitting region resulting in the overlapping area A_G;

a projection on the array substrate of the fourth pixel sub-electrode substantially overlaps with that of the second white light emitting region resulting in the overlapping area B_G; and

a projection on the array substrate of the fifth pixel sub-electrode substantially overlaps with that of the blue light emitting region resulting in an overlapping area A_B; and

a projection on the array substrate of the sixth pixel sub-electrode substantially overlaps with that of the third white light emitting region resulting in the overlapping area B_B.

20. The array substrate of claim 16, wherein the first pixel electrode is an integral pixel electrode, the second pixel electrode is an integral pixel electrode, and the third pixel electrode is an integral pixel electrode.