阅读说明：本技术 光学元件 (Optical element ) 是由 涂宗儒 于 2019-08-02 设计创作，主要内容包括：本发明提供一种光学元件。该光学元件包括：一中心区,具有多个中心像素；一第一区,具有多个第一像素；一第二区,具有多个第二像素；一有机层,形成于该中心区、该第一区与该第二区中；以及一光收集层,包括一第一光收集元件与一第二光收集元件,由该有机层所包围,形成于该第一区与该第二区中,其中该第一光收集元件形成于该第一像素中,该第二光收集元件形成于该第二像素中。该中心区、该第一区与该第二区彼此分隔沿着一排列方向排列,且该第一区较该第二区邻近该中心区。该第一光收集元件不同于该第二光收集元件。(The invention provides an optical element. The optical element includes: a central region having a plurality of central pixels; a first region having a plurality of first pixels; a second region having a plurality of second pixels; an organic layer formed in the central region, the first region and the second region; and a light collection layer including a first light collection element and a second light collection element surrounded by the organic layer and formed in the first region and the second region, wherein the first light collection element is formed in the first pixel and the second light collection element is formed in the second pixel. The central area, the first area and the second area are arranged along an arrangement direction in a separated way, and the first area is adjacent to the central area compared with the second area. The first light collecting element is different from the second light collecting element.)

1. An optical element, comprising:

a central region having a plurality of central pixels;

a first region having a plurality of first pixels;

a second region having a plurality of second pixels, wherein the central region, the first region and the second region are spaced apart from each other and arranged along an arrangement direction, and the first region is adjacent to the central region than the second region;

an organic layer formed in the central region, the first region and the second region; and

a light collection layer, including a first light collection element and a second light collection element, surrounded by the organic layer, formed in the first region and the second region, wherein the first light collection element is formed in the first pixel, the second light collection element is formed in the second pixel, and the first light collection element is different from the second light collection element.

2. The optical device of claim 1, wherein a first distance is formed between a center of the first pixel and a center of the first light collecting element, a second distance is formed between a center of the second pixel and a center of the second light collecting element, the second distance being greater than the first distance, and the center of the first light collecting element is away from the center of the first pixel in a direction opposite to the arrangement direction of the central region, the first region and the second region, and the center of the second light collecting element is away from the center of the second pixel in a direction opposite to the arrangement direction of the central region, the first region and the second region.

3. The optical element of claim 1, wherein a first distance is formed between a center of the first pixel and a center of the first light collecting element, and a second distance is formed between a center of the second pixel and a center of the second light collecting element, the first distance and the second distance being the same.

4. The optical element of claim 3, wherein the width of the second light collecting element is greater than the width of the first light collecting element, the width of the first light collecting element is greater than 0, and the width of the second light collecting element is less than the width of the second pixel.

5. The optical element of claim 3, wherein the second light collection element has an upper surface area that is larger than an upper surface area of the first light collection element.

6. The optical element of claim 3, wherein the thickness of the second light collecting element is greater than the thickness of the first light collecting element, the thickness of the second light collecting element is greater than the thickness of the organic layer, and the first light collecting element and the second light collecting element are further covered by the organic layer.

7. The optical device of claim 3, wherein a portion of the second light collecting element extends further into a color filter located below the second light collecting element, the portion of the second light collecting element extending into the color filter having a thickness less than one third of the thickness of the color filter.

8. The optical element of claim 2, wherein the width of the second light collecting element is greater than the width of the first light collecting element, and the thickness of the second light collecting element is greater than the thickness of the first light collecting element.

9. The optical device of claim 8, wherein the second light collecting element further extends over a patterned organic layer surrounding a color filter under the second light collecting element, the patterned organic layer having a refractive index of 1.2 to 1.45.

10. The optical device according to claim 1, wherein the refractive index of the first light collecting element and the refractive index of the second light collecting element are greater than the refractive index of the color filter respectively located below the first light collecting element and the second light collecting element, and the refractive index of the first light collecting element and the refractive index of the second light collecting element are between 1.6 and 1.9.

11. The optical device of claim 1, further comprising an anti-reflective layer formed on the organic layer, the first light collecting element and the second light collecting element, wherein the refractive index of the first light collecting element and the refractive index of the second light collecting element are greater than the refractive index of the anti-reflective layer.

Technical Field

The present invention relates to an optical element, and more particularly, to an optical element having light collecting elements formed on a color filter and having different sizes and positions.

Background

In an optical element having a Composite Metal Grid (CMG) structure, a microlens is required to be provided on a color filter. In an optical device having a WGCF (waveguide color filter) structure, a low refractive index material surrounding a color filter is used instead of a microlens to form a waveguide structure.

However, in an optical element having a waveguide color filter (WGCF) structure, the Quantum Efficiency (QE) of the pixel is reduced due to the absorption of oblique light by the metal grating, especially for the pixel located at the edge region of the substrate.

Therefore, it is desirable to develop an optical device having a waveguide color filter (WGCF) structure that can improve the quantum efficiency spectrum.

Disclosure of Invention

According to an embodiment of the present invention, an optical element is provided. The optical element includes: a central region having a plurality of central pixels; a first region having a plurality of first pixels; a second region having a plurality of second pixels; an organic layer formed in the central region, the first region and the second region; and a light collection layer (light collection layer) including a first light collection element and a second light collection element surrounded by the organic layer and formed in the first region and the second region, wherein the first light collection element is formed in the first pixel and the second light collection element is formed in the second pixel. The central region, the first region and the second region are spaced from each other and arranged along an arrangement direction. The first region is adjacent to the central region than the second region. The first light collecting element is different from the second light collecting element.

In some embodiments, a first distance is formed between a center of the first pixel and a center of the first light collecting element, and a second distance is formed between a center of the second pixel and a center of the second light collecting element. In some embodiments, the second distance is greater than the first distance, the center of the first light collecting element is away from the center of the first pixel in a direction opposite to the arrangement direction of the central region, the first region and the second region, and the center of the second light collecting element is away from the center of the second pixel in a direction opposite to the arrangement direction of the central region, the first region and the second region.

In some embodiments, the first distance is the same as the second distance. In some embodiments, the width of the second light collecting element is greater than the width of the first light collecting element. In some embodiments, the width of the first light collection element is greater than 0, and the width of the second light collection element is less than the width of the second pixel. In some embodiments, the upper surface area of the second light collecting element is larger than the upper surface area of the first light collecting element. In some embodiments, the thickness of the second light collecting element is greater than the thickness of the first light collecting element. In some embodiments, the second light collecting element has a thickness greater than a thickness of the organic layer. In some embodiments, the first light collecting element and the second light collecting element are further covered by the organic layer. In some embodiments, a portion of the second light collecting element further extends into a color filter located below the second light collecting element. In some embodiments, the portion of the second light collecting element extending into the color filter has a thickness less than one third of the thickness of the color filter.

In some embodiments, the width of the second light collecting element is greater than the width of the first light collecting element, and the thickness of the second light collecting element is greater than the thickness of the first light collecting element. In some embodiments, the second light collection element further extends over a patterned organic layer surrounding a color filter under the second light collection element. In some embodiments, the refractive index of the patterned organic layer is between 1.2 and 1.45.

In some embodiments, the refractive index of the first light collecting element and the refractive index of the second light collecting element are greater than the refractive index of the color filter respectively located below the first light collecting element and the second light collecting element. In some embodiments, the refractive index of the first light collecting element and the refractive index of the second light collecting element are between 1.6 and 1.9. In some embodiments, the optical device further includes an anti-reflection layer (anti-reflection layer) formed on the organic layer, the first light collecting element and the second light collecting element. In some embodiments, the refractive index of the first light collecting element and the refractive index of the second light collecting element are greater than the refractive index of the anti-reflection layer.

In the present invention, a light collecting element having a high refractive index (n is 1.6 to 1.9) with a specific size or position is provided on a color filter. For size requirements, the width (or thickness) of the light collecting elements disposed farther from the central pixel needs to be larger than the width (or thickness) of the light collecting elements disposed adjacent to the central pixel. For the requirement of position, the distance between the center point of the light collecting element far away from the central pixel and the center point of the pixel where the light collecting element is located (i.e. the distance of the light collecting element deviating from the center point of the pixel) needs to be larger than the distance between the center point of the light collecting element near the central pixel and the center point of the pixel where the light collecting element is located. It is noted that the direction of the deviation of the light collecting elements is opposite to the direction of the pixel arrangement. Furthermore, the deviation direction of the light collection element in the pixel can be changed correspondingly according to different pixel arrangement directions. Furthermore, the refractive index of the light collecting element is larger than the refractive index of the adjacent material. The specific light collecting element is arranged, so that the Quantum Efficiency (QE) peak value of the color filter can be greatly improved, and particularly the quantum efficiency peak value of the pixel positioned at the edge of the substrate can be improved.

Drawings

FIG. 1 is a top view of a pixel arrangement of an optical element, according to an embodiment of the invention;

FIG. 2 is a top view of a pixel structure of an optical element, according to an embodiment of the invention;

FIG. 3 is a schematic cross-sectional view of a pixel structure of an optical device according to an embodiment of the invention;

FIG. 4 is a top view of a pixel structure of an optical element, according to an embodiment of the invention;

FIG. 5 is a cross-sectional view of a pixel structure of an optical device according to an embodiment of the invention;

FIG. 6 is a top view of a pixel structure of an optical element, according to an embodiment of the invention;

FIG. 7 is a cross-sectional view of a pixel structure of an optical device according to an embodiment of the invention;

FIG. 8 is a top view of a pixel structure of an optical element, according to an embodiment of the invention;

FIG. 9 is a cross-sectional view of a pixel structure of an optical device according to an embodiment of the invention;

FIG. 10 is a top view of a pixel structure of an optical element, according to an embodiment of the invention;

FIG. 11 is a cross-sectional view of a pixel structure of an optical device according to an embodiment of the invention; and

FIG. 12 is a Quantum Efficiency (QE) peak for an optical element, according to an embodiment of the present invention.

Description of reference numerals:

10 optical element

12 base q board

12a center of the substrate

12b edge of substrate

14 center region of substrate

14a, 14b, 14c, 14d center pixel

16 first region of the substrate

16a, 16b, 16c, 16d first pixel

18 second region of the substrate

18a, 18b, 18c, 18d second pixel

20 third zone of the substrate

20a, 20b, 20c, 20d third pixel

22 green filter

22a, 22b, 22c, 22d, 22e, 22f, 22g, 22h pixel arrangement direction

24 red filter

26 blue filter

28 Metal grid

30 patterning the first organic layer

32 color filter

34 second organic layer

36 light collecting element

38 oxide layer

40 anti-reflection layer

42 (away) direction

First area of A1 light collecting element

Second area of A2 light collecting element

Third area of A3 light collecting element

D1 first distance

D2 second distance

D3 third distance

P_LCenter point of light collecting element

P_SCenter point of the first/second/third pixel

First thickness of T1 light collecting element

Second thickness of T2 light collecting element

Third thickness of T3 light collecting element

T3_LThe light-collecting element extending into the thickness of the color filter

T_CFThickness of color filter

T_LThickness of the second organic layer

Width of Wth third pixel

First width of W1 light collecting element

Second width of W2 light collecting element

Third width of W3 light collecting element

Detailed Description

Referring to fig. 1-3, an optical device 10 is provided according to an embodiment of the invention. Fig. 1 is a top view of a pixel arrangement of an optical element 10. Fig. 2 is a top view of the pixel structure of the optical element 10. Fig. 3 is a schematic cross-sectional view of a pixel structure of the optical element 10.

In fig. 1, 2, an optical element 10 includes a substrate 12 including a central region 14, a first region 16, a second region 18, and a third region 20. The central zone 14, the first zone 16, the second zone 18, and the third zone 20 are spaced apart from one another. The first region 16 is adjacent the central region 14 as compared to the second region 18. The second region 18 is adjacent the first region 16 as compared to the third region 20. The central region 14 has a plurality of central pixels, e.g., 14a, 14b, 14c, 14 d. The first region 16 has a plurality of first pixels, e.g., 16a, 16b, 16c, 16 d. The second region 18 has a plurality of second pixels, e.g., 18a, 18b, 18c, 18 d. The third region 20 has a plurality of third pixels, e.g., 20a, 20b, 20c, 20 d. The central pixels (14a, 14b, 14c, 14d) of the central region 14, the first pixels (16a, 16b, 16c, 16d) of the first region 16, the second pixels (18a, 18b, 18c, 18d) of the second region 18, and the third pixels (20a, 20b, 20c, 20d) of the third region 20 are arranged along a pixel arrangement direction. The pixel arrangement direction is a direction from the center 12a to the edge 12b of the substrate 12, and includes various pixel arrangement directions (22a, 22b, 22c, 22d, 22e, 22f, 22g, 22h), for example, as shown in fig. 1. The pixel arrangement direction 22a represents a diagonal arrangement direction of pixels from the center of the substrate 12 to the lower left. The pixel arrangement direction 22b represents a horizontal arrangement direction (along the X axis) of the pixels from the center to the left of the substrate 12. The pixel arrangement direction 22c represents a diagonal arrangement direction of pixels from the center of the substrate 12 to the upper left side. The pixel arrangement direction 22d indicates a vertical arrangement direction (along the Y axis) of the pixels from the center to the upper side of the substrate 12. The pixel arrangement direction 22e represents a diagonal arrangement direction of pixels from the center of the substrate 12 to the upper right side. The pixel arrangement direction 22f represents a horizontal arrangement direction (along the X axis) of the pixels from the center of the substrate 12 to the right. The pixel arrangement direction 22g represents a diagonal arrangement direction of pixels from the center of the substrate 12 to the lower right. The pixel arrangement direction 22h indicates a vertical arrangement direction (along the Y axis) of the pixels from the center to the lower side of the substrate 12. Here, the arrangement direction of the center pixels (14a, 14b, 14c, 14d), the first pixels (16a, 16b, 16c, 16d), the second pixels (18a, 18b, 18c, 18d), and the third pixels (20a, 20b, 20c, 20d) is described taking the pixel arrangement direction 22a as an example.

In fig. 2, the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a include a green (G) filter 22. The center pixel 14b, the first pixel 16b, the second pixel 18b, and the third pixel 20b include a red (R) filter 24. The center pixel 14c, the first pixel 16c, the second pixel 18c, and the third pixel 20c include a blue (B) filter 26. The center pixel 14d, the first pixel 16d, the second pixel 18d, and the third pixel 20d include a green (G) filter 22. In some embodiments, other arrangements of the green (G) filter 22, the red (R) filter 24 and the blue (B) filter 26 in the pixel are also suitable for the present invention. Here, the central pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a are taken as an example to describe different pixel structures therebetween.

Referring to fig. 2 and 3, the central pixel 14a includes a plurality of metal gates 28, a patterned first organic layer 30, a color filter 32, and a second organic layer 34. A metal grid 28 is formed on the substrate 12. A patterned first organic layer 30 is formed on the metal gate 28 and surrounds a color filter 32. The second organic layer 34 is formed on the patterned first organic layer 30 and the color filter 32. Each of the first pixel 16a, the second pixel 18a, and the third pixel 20a includes a plurality of metal gates 28, a patterned first organic layer 30, a color filter 32, a second organic layer 34, and a light collection element (light collection element) 36. A metal grid 28 is formed on the substrate 12. A patterned first organic layer 30 is formed on the metal gate 28 and surrounds a color filter 32. The second organic layer 34 is formed on the patterned first organic layer 30 and the color filter 32, and surrounds the light collection element 36. Notably, lightThe collection element 36 has a refractive index greater than the refractive index of the second organic layer 34. Here, no light collecting element is disposed at the center pixel 14 a. In addition, the center point P of the first pixel 16a is defined in the first pixel 16a, the second pixel 18a and the third pixel 20a_SAnd a center point P of the light collecting element 36_LIs a first distance D1, the center point P of the second pixel 18a_SAnd a center point P of the light collecting element 36_LIs a second distance D2, and a center point P of the third pixel 20a_SAnd a center point P of the light collecting element 36_LIs a third distance D3.

In fig. 2 and 3, the first distance D1, the second distance D2, and the third distance D3 are all different. Referring to FIG. 2, in the first pixel 16a, the center point P of the light collection element 36_LFrom a center point P of the first pixel 16a along the direction 42_SAway from. In the second pixel 18a, the center point P of the light collection element 36_LFrom the center point P of the second pixel 18a along the direction 42_SAway from. In the third pixel 20a, the center point P of the light collection element 36_LFrom the center point P of the third pixel 20a along the direction 42_SAway from. It is noted that the direction of departure 42 represents the center point P of the light collecting element 36_LFrom the center point P of the first pixel 16a, the second pixel 18a, and the third pixel 20a, respectively_SToward the diagonally distant direction of the upper right side. Here, the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a are arranged along a pixel arrangement direction 22a (i.e., a diagonal arrangement direction of pixels from the center of the substrate 12 to the lower left side), as shown in fig. 1. Therefore, the separating direction 42 of the light collection element 36 is opposite to the pixel arrangement direction 22 a.

The direction 42 of the light collection element 36 may be varied accordingly to ensure that the direction of the light collection element away is opposite to the direction of the pixel arrangement, depending on the direction of the pixel arrangement. In some embodiments, the center point P of the light collection element 36 is when the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a are arranged along the pixel arrangement direction 22b (i.e., the horizontal arrangement direction (along the X-axis) of the pixels from the center to the left of the substrate 12)_LRespectively from the firstCenter point P of pixel 16a, second pixel 18a, and third pixel 20a_SAway horizontally towards the right. In some embodiments, when the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a are arranged along the pixel arrangement direction 22c (i.e., the diagonal arrangement direction of the pixels from the center to the upper left side of the substrate 12), the center point P of the light collection element 36_LFrom the center point P of the first pixel 16a, the second pixel 18a, and the third pixel 20a, respectively_SAway toward the diagonally lower right side. In some embodiments, the center point P of the light collection element 36 is when the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a are arranged along the pixel arrangement direction 22d (i.e., the vertical arrangement direction (along the Y axis) of the pixels from the center to the upper side of the substrate 12), the center point P of the light collection element 36_LFrom the center point P of the first pixel 16a, the second pixel 18a, and the third pixel 20a, respectively_SAway in the vertical direction towards the lower side. In some embodiments, when the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a are arranged along the pixel arrangement direction 22e (i.e., the diagonal arrangement direction of the pixels from the center to the upper right side of the substrate 12), the center point P of the light collection element 36_LFrom the center point P of the first pixel 16a, the second pixel 18a, and the third pixel 20a, respectively_SAway diagonally towards the left and lower side. In some embodiments, the center point P of the light collection element 36 is when the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a are arranged along the pixel arrangement direction 22f (i.e., the horizontal arrangement direction (along the X-axis) of the pixels from the center to the right of the substrate 12), and the center point P of the light collection element 36 is the same as the horizontal arrangement direction (along the X-axis) of the pixels from the center to the right of the substrate 12_LFrom the center point P of the first pixel 16a, the second pixel 18a, and the third pixel 20a, respectively_SHorizontally away toward the left. In some embodiments, when the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a are arranged along the pixel arrangement direction 22g (i.e., the diagonal arrangement direction of the pixels from the center to the lower right side of the substrate 12), the center point P of the light collection element 36_LFrom the center point P of the first pixel 16a, the second pixel 18a, and the third pixel 20a, respectively_SAway in a diagonal direction toward the upper left side.In some embodiments, the center point P of the light collection element 36 is when the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a are arranged along the pixel arrangement direction 22h (i.e., the vertical arrangement direction (along the Y axis) of the pixels from the center to the lower side of the substrate 12)_LFrom the center point P of the first pixel 16a, the second pixel 18a, and the third pixel 20a, respectively_SAway towards the vertical direction of the upper side.

In fig. 2, 3, the third distance D3 in the third pixel 20a is greater than the second distance D2 in the second pixel 18 a. The second distance D2 in the second pixel 18a is greater than the first distance D1 in the first pixel 16 a. The first distance D1 in the first pixel 16a is greater than 0.

In some embodiments, the refractive index of the patterned first organic layer 30 is approximately between 1.2 and 1.45. In some embodiments, the refractive index of the light collection element 36 is greater than the refractive index of the color filter 32. In some embodiments, the refractive index of the light collection element 36 is approximately between 1.6 and 1.9. In some embodiments, each of the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a further includes an oxide layer 38 covering the metal gate 28. In some embodiments, each of the central pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a further includes an anti-reflection layer (anti-reflection layer)40 formed on the second organic layer 34. In some embodiments, the refractive index of the light collection element 36 is greater than the refractive index of the anti-reflective layer 40.

Referring to fig. 1, 4 and 5, an optical device 10 is provided according to an embodiment of the present invention. Fig. 4 is a top view of the pixel structure of the optical element 10. Fig. 5 is a schematic cross-sectional view of a pixel structure of the optical element 10.

In fig. 1, similarly, the arrangement direction of the center pixels (14a, 14b, 14c, 14d), the first pixels (16a, 16b, 16c, 16d), the second pixels (18a, 18b, 18c, 18d), and the third pixels (20a, 20b, 20c, 20d) will be described by taking the pixel arrangement direction 22a as an example.

In fig. 4, the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a include a green (G) filter 22. The center pixel 14b, the first pixel 16b, the second pixel 18b, and the third pixel 20b include a red (R) filter 24. The center pixel 14c, the first pixel 16c, the second pixel 18c, and the third pixel 20c include a blue (B) filter 26. The center pixel 14d, the first pixel 16d, the second pixel 18d, and the third pixel 20d include a green (G) filter 22. In some embodiments, other arrangements of the green (G) filter 22, the red (R) filter 24 and the blue (B) filter 26 in the pixel are also suitable for the present invention. Here, the central pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a are taken as an example to describe different pixel structures therebetween.

Referring to fig. 4 and 5, the central pixel 14a includes a plurality of metal gates 28, a patterned first organic layer 30, a color filter 32, and a second organic layer 34. A metal grid 28 is formed on the substrate 12. A patterned first organic layer 30 is formed on the metal gate 28 and surrounds a color filter 32. The second organic layer 34 is formed on the patterned first organic layer 30 and the color filter 32. Each of the first pixel 16a, the second pixel 18a, and the third pixel 20a includes a plurality of metal gates 28, a patterned first organic layer 30, a color filter 32, a second organic layer 34, and a light collection element (light collection element) 36. A metal grid 28 is formed on the substrate 12. A patterned first organic layer 30 is formed on the metal gate 28 and surrounds a color filter 32. The second organic layer 34 is formed on the patterned first organic layer 30 and the color filter 32, and surrounds the light collection element 36. Notably, the refractive index of the light collection element 36 is greater than the refractive index of the second organic layer 34. Here, no light collecting element is disposed at the center pixel 14 a. In addition, in the first pixel 16a, the second pixel 18a, and the third pixel 20a, the center point P of the first pixel 16a is defined_SAnd a center point P of the light collecting element 36_LIs a first distance, the center point P of the second pixel 18a_SAnd a center point P of the light collecting element 36_LIs a second distance, and a center point P of the third pixel 20a_SAnd a center point P of the light collecting element 36_LIs the third distance.

In fig. 4 and 5, the first distance, the second distance, and the third distanceThe distances are all 0. Referring to FIG. 4, in the first pixel 16a, the center point P of the light collection element 36_LAnd a center point P of the first pixel 16a_SAnd (4) overlapping. In the second pixel 18a, the center point P of the light collection element 36_LAnd a center point P of the second pixel 18a_SAnd (4) overlapping. In the third pixel 20a, the center point P of the light collection element 36_LAnd a center point P of the third pixel 20a_SAnd (4) overlapping. That is, the center point P of the light collection element 36_LAnd the center point P of the first pixel 16a, the second pixel 18a, and the third pixel 20a_SWithout deviation therebetween.

In fig. 4, 5, in the first pixel 16a, the second pixel 18a, and the third pixel 20a, a first width W1 of the light collecting element 36 of the first pixel 16a, a second width W2 of the light collecting element 36 of the second pixel 18a, and a third width W3 of the light collecting element 36 of the third pixel 20a are defined. Notably, the third width W3 of the light collecting element 36 of the third pixel 20a is greater than the second width W2 of the light collecting element 36 of the second pixel 18 a. The second width W2 of the light collecting element 36 of the second pixel 18a is greater than the first width W1 of the light collecting element 36 of the first pixel 16 a. In some embodiments, the first width W1 of the light collection element 36 of the first pixel 16a is greater than 0. The third width W3 of the light collecting element 36 of the third pixel 20a is smaller than the width W of the third pixel 20 a. In addition, a first area A1 of the light collection element 36 of the first pixel 16a, a second area A2 of the light collection element 36 of the second pixel 18a, and a third area A3 of the light collection element 36 of the third pixel 20a are also defined. Similarly, the third area A3 of the light collecting element 36 of the third pixel 20a is larger than the second area A2 of the light collecting element 36 of the second pixel 18a, and the second area A2 of the light collecting element 36 of the second pixel 18a is larger than the first area A1 of the light collecting element 36 of the first pixel 16 a.

In some embodiments, the refractive index of the patterned first organic layer 30 is approximately between 1.2 and 1.45. In some embodiments, the refractive index of the light collection element 36 is greater than the refractive index of the color filter 32. In some embodiments, the refractive index of the light collection element 36 is approximately between 1.6 and 1.9. In some embodiments, each of the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a further includes an oxide layer 38 covering the metal gate 28. In some embodiments, each of the central pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a further includes an anti-reflection layer (anti-reflection layer)40 formed on the second organic layer 34. In some embodiments, the refractive index of the light collection element 36 is greater than the refractive index of the anti-reflective layer 40.

Referring to fig. 1, 6 and 7, an optical device 10 is provided according to an embodiment of the present invention. Fig. 6 is a top view of the pixel structure of the optical element 10. Fig. 7 is a cross-sectional view of the pixel structure of the optical element 10.

In fig. 1, similarly, the arrangement direction of the center pixels (14a, 14b, 14c, 14d), the first pixels (16a, 16b, 16c, 16d), the second pixels (18a, 18b, 18c, 18d), and the third pixels (20a, 20b, 20c, 20d) will be described by taking the pixel arrangement direction 22a as an example.

In fig. 6, the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a include a green (G) filter 22. The center pixel 14b, the first pixel 16b, the second pixel 18b, and the third pixel 20b include a red (R) filter 24. The center pixel 14c, the first pixel 16c, the second pixel 18c, and the third pixel 20c include a blue (B) filter 26. The center pixel 14d, the first pixel 16d, the second pixel 18d, and the third pixel 20d include a green (G) filter 22. In some embodiments, other arrangements of the green (G) filter 22, the red (R) filter 24 and the blue (B) filter 26 in the pixel are also suitable for the present invention. Here, the central pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a are taken as an example to describe different pixel structures therebetween.

Referring to fig. 6 and 7, the central pixel 14a includes a plurality of metal gates 28, a patterned first organic layer 30, a color filter 32, and a second organic layer 34. A metal grid 28 is formed on the substrate 12. A patterned first organic layer 30 is formed on the metal gate 28 and surrounds a color filter 32. The second organic layer 34 is formed on the patterned first organic layer 30 and the color filter 32. Each of the first pixel 16a, the second pixel 18a, and the third pixel20a includes a plurality of metal gates 28, a patterned first organic layer 30, a color filter 32, a second organic layer 34, and a light collection element (light collection element) 36. A metal grid 28 is formed on the substrate 12. A patterned first organic layer 30 is formed on the metal gate 28 and surrounds a color filter 32. The second organic layer 34 is formed on the patterned first organic layer 30 and the color filter 32, and surrounds the light collection element 36. Notably, the refractive index of the light collection element 36 is greater than the refractive index of the second organic layer 34. Here, no light collecting element is disposed at the center pixel 14 a. In addition, in the first pixel 16a, the second pixel 18a, and the third pixel 20a, the center point P of the first pixel 16a is defined_SAnd a center point P of the light collecting element 36_LIs a first distance, the center point P of the second pixel 18a_SAnd a center point P of the light collecting element 36_LIs a second distance, and a center point P of the third pixel 20a_SAnd a center point P of the light collecting element 36_LIs the third distance.

In fig. 6 and 7, the first distance, the second distance, and the third distance are all 0. Referring to FIG. 6, in the first pixel 16a, the center point P of the light collection element 36_LAnd a center point P of the first pixel 16a_SAnd (4) overlapping. In the second pixel 18a, the center point P of the light collection element 36_LAnd a center point P of the second pixel 18a_SAnd (4) overlapping. In the third pixel 20a, the center point P of the light collection element 36_LAnd a center point P of the third pixel 20a_SAnd (4) overlapping. That is, the center point P of the light collection element 36_LAnd the center point P of the first pixel 16a, the second pixel 18a, and the third pixel 20a_SWithout deviation therebetween.

In fig. 7, in the first pixel 16a, the second pixel 18a, and the third pixel 20a, a first thickness T1 of the light collecting element 36 of the first pixel 16a, a second thickness T2 of the light collecting element 36 of the second pixel 18a, and a third thickness T3 of the light collecting element 36 of the third pixel 20a are defined. Notably, the third thickness T3 of the light collecting element 36 of the third pixel 20a is greater than the second thickness T2 of the light collecting element 36 of the second pixel 18 a. The light collecting element 36 of the second pixel 18aIs greater than the first thickness T1 of the light collecting element 36 of the first pixel 16 a. Furthermore, in FIG. 7, the second thickness T2 of the light collecting element 36 of the second pixel 18a is greater than the thickness T of the second organic layer 34_L. In some embodiments, the second organic layer 34 may further cover the light collecting elements 36 (not shown) respectively located in the first pixel 16a, the second pixel 18a, and the third pixel 20 a.

In some embodiments, the refractive index of the patterned first organic layer 30 is approximately between 1.2 and 1.45. In some embodiments, the refractive index of the light collection element 36 is greater than the refractive index of the color filter 32. In some embodiments, the refractive index of the light collection element 36 is approximately between 1.6 and 1.9. In some embodiments, each of the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a further includes an oxide layer 38 covering the metal gate 28. In some embodiments, each of the central pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a further includes an anti-reflection layer (anti-reflection layer)40 formed on the second organic layer 34. In some embodiments, the refractive index of the light collection element 36 is greater than the refractive index of the anti-reflective layer 40.

Referring to fig. 1, 8 and 9, an optical device 10 is provided according to an embodiment of the present invention. Fig. 8 is a top view of the pixel structure of the optical element 10. Fig. 9 is a schematic cross-sectional view of a pixel structure of the optical element 10.

In fig. 1, similarly, the arrangement direction of the center pixels (14a, 14b, 14c, 14d), the first pixels (16a, 16b, 16c, 16d), the second pixels (18a, 18b, 18c, 18d), and the third pixels (20a, 20b, 20c, 20d) will be described by taking the pixel arrangement direction 22a as an example.

In fig. 8, the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a include a green (G) filter 22. The center pixel 14b, the first pixel 16b, the second pixel 18b, and the third pixel 20b include a red (R) filter 24. The center pixel 14c, the first pixel 16c, the second pixel 18c, and the third pixel 20c include a blue (B) filter 26. The center pixel 14d, the first pixel 16d, the second pixel 18d, and the third pixel 20d include a green (G) filter 22. In some embodiments, other arrangements of the green (G) filter 22, the red (R) filter 24 and the blue (B) filter 26 in the pixel are also suitable for the present invention. Here, the central pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a are taken as an example to describe different pixel structures therebetween.

Referring to fig. 8 and 9, the central pixel 14a includes a plurality of metal gates 28, a patterned first organic layer 30, a color filter 32, and a second organic layer 34. A metal grid 28 is formed on the substrate 12. A patterned first organic layer 30 is formed on the metal gate 28 and surrounds a color filter 32. The second organic layer 34 is formed on the patterned first organic layer 30 and the color filter 32. Each of the first pixel 16a, the second pixel 18a, and the third pixel 20a includes a plurality of metal gates 28, a patterned first organic layer 30, a color filter 32, a second organic layer 34, and a light collection element (light collection element) 36. A metal grid 28 is formed on the substrate 12. A patterned first organic layer 30 is formed on the metal gate 28 and surrounds a color filter 32. The second organic layer 34 is formed on the patterned first organic layer 30 and the color filter 32, and surrounds the light collection element 36. Notably, the refractive index of the light collection element 36 is greater than the refractive index of the second organic layer 34. Here, no light collecting element is disposed at the center pixel 14 a. In addition, in the first pixel 16a, the second pixel 18a, and the third pixel 20a, the center point P of the first pixel 16a is defined_SAnd a center point P of the light collecting element 36_LIs a first distance, the center point P of the second pixel 18a_SAnd a center point P of the light collecting element 36_LIs a second distance, and a center point P of the third pixel 20a_SAnd a center point P of the light collecting element 36_LIs the third distance.

In fig. 8 and 9, the first distance, the second distance, and the third distance are all 0. Referring to FIG. 8, in the first pixel 16a, the center point P of the light collection element 36_LAnd a center point P of the first pixel 16a_SAnd (4) overlapping. In the second pixel 18a, the center point P of the light collection element 36_LAnd a center point P of the second pixel 18a_SAnd (4) overlapping. In the third pixel 20a, lightCenter point P of collecting element 36_LAnd a center point P of the third pixel 20a_SAnd (4) overlapping. That is, the center point P of the light collection element 36_LAnd the center point P of the first pixel 16a, the second pixel 18a, and the third pixel 20a_SWithout deviation therebetween.

Referring to fig. 9, in the second pixel 18a, a portion of the light collection element 36 further extends into the color filter 32. Similarly, in the third pixel 20a, a portion of the light collection element 36 also extends into the color filter 32. In the first pixel 16a, the second pixel 18a, and the third pixel 20a, a first thickness T1 of the light collecting element 36 of the first pixel 16a, a second thickness T2 of the light collecting element 36 of the second pixel 18a, and a third thickness T3 of the light collecting element 36 of the third pixel 20a are defined. Notably, the third thickness T3 of the light collecting element 36 of the third pixel 20a is greater than the second thickness T2 of the light collecting element 36 of the second pixel 18 a. The second thickness T2 of the light collecting element 36 of the second pixel 18a is greater than the first thickness T1 of the light collecting element 36 of the first pixel 16 a. In some embodiments, the thickness T3 of the portion of the light collection element 36 that extends into the color filter 32_LLess than the thickness T of the color filter 32_CFOne third of the total.

In some embodiments, the refractive index of the patterned first organic layer 30 is approximately between 1.2 and 1.45. In some embodiments, the refractive index of the light collection element 36 is greater than the refractive index of the color filter 32. In some embodiments, the refractive index of the light collection element 36 is approximately between 1.6 and 1.9. In some embodiments, each of the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a further includes an oxide layer 38 covering the metal gate 28. In some embodiments, each of the central pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a further includes an anti-reflection layer (anti-reflection layer)40 formed on the second organic layer 34. In some embodiments, the refractive index of the light collection element 36 is greater than the refractive index of the anti-reflective layer 40.

Referring to fig. 1, 10 and 11, an optical device 10 is provided according to an embodiment of the present invention. Fig. 10 is a top view of the pixel structure of the optical element 10. Fig. 11 is a schematic cross-sectional view of a pixel structure of the optical element 10.

In fig. 1, similarly, the arrangement direction of the center pixels (14a, 14b, 14c, 14d), the first pixels (16a, 16b, 16c, 16d), the second pixels (18a, 18b, 18c, 18d), and the third pixels (20a, 20b, 20c, 20d) will be described by taking the pixel arrangement direction 22a as an example.

In fig. 10, the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a include a green (G) filter 22. The center pixel 14b, the first pixel 16b, the second pixel 18b, and the third pixel 20b include a red (R) filter 24. The center pixel 14c, the first pixel 16c, the second pixel 18c, and the third pixel 20c include a blue (B) filter 26. The center pixel 14d, the first pixel 16d, the second pixel 18d, and the third pixel 20d include a green (G) filter 22. In some embodiments, other arrangements of the green (G) filter 22, the red (R) filter 24 and the blue (B) filter 26 in the pixel are also suitable for the present invention. Here, the central pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a are taken as an example to describe different pixel structures therebetween.

Referring to fig. 10 and 11, the central pixel 14a includes a plurality of metal gates 28, a patterned first organic layer 30, a color filter 32, and a second organic layer 34. A metal grid 28 is formed on the substrate 12. A patterned first organic layer 30 is formed on the metal gate 28 and surrounds a color filter 32. The second organic layer 34 is formed on the patterned first organic layer 30 and the color filter 32. Each of the first pixel 16a, the second pixel 18a, and the third pixel 20a includes a plurality of metal gates 28, a patterned first organic layer 30, a color filter 32, a second organic layer 34, and a light collection element (light collection element) 36. A metal grid 28 is formed on the substrate 12. A patterned first organic layer 30 is formed on the metal gate 28 and surrounds a color filter 32. The second organic layer 34 is formed on the patterned first organic layer 30 and the color filter 32, and surrounds the light collection element 36. Notably, the refractive index of the light collection element 36 is greater than the refractive index of the second organic layer 34. Here, no light collecting element is disposed at the center pixel 14 a. In addition to this, the present invention is,in the first pixel 16a, the second pixel 18a and the third pixel 20a, a center point P of the first pixel 16a is defined_SAnd a center point P of the light collecting element 36_LIs a first distance D1, the center point P of the second pixel 18a_SAnd a center point P of the light collecting element 36_LIs a second distance D2, and a center point P of the third pixel 20a_SAnd a center point P of the light collecting element 36_LIs a third distance D3.

In fig. 10 and 11, the first distance D1, the second distance D2, and the third distance D3 are all different. Referring to FIG. 10, in the first pixel 16a, the center point P of the light collection element 36_LFrom a center point P of the first pixel 16a along the direction 42_SAway from. In the second pixel 18a, the center point P of the light collection element 36_LFrom the center point P of the second pixel 18a along the direction 42_SAway from. In the third pixel 20a, the center point P of the light collection element 36_LFrom the center point P of the third pixel 20a along the direction 42_SAway from. It is noted that the direction of departure 42 represents the center point P of the light collecting element 36_LFrom the center point P of the first pixel 16a, the second pixel 18a, and the third pixel 20a, respectively_SToward the diagonally distant direction of the upper right side. Here, the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a are arranged along a pixel arrangement direction 22a (i.e., a diagonal arrangement direction of pixels from the center of the substrate 12 to the lower left side), as shown in fig. 1. Therefore, the separating direction 42 of the light collection element 36 is opposite to the pixel arrangement direction 22 a.

In fig. 10, 11, the third distance D3 in the third pixel 20a is greater than the second distance D2 in the second pixel 18 a. The second distance D2 in the second pixel 18a is greater than the first distance D1 in the first pixel 16 a. The first distance D1 in the first pixel 16a is greater than 0.

In fig. 10, 11, in the first pixel 16a, the second pixel 18a, and the third pixel 20a, a first width W1 of the light collecting element 36 of the first pixel 16a, a second width W2 of the light collecting element 36 of the second pixel 18a, and a third width W3 of the light collecting element 36 of the third pixel 20a are defined. Notably, the third width W3 of the light collecting element 36 of the third pixel 20a is greater than the second width W2 of the light collecting element 36 of the second pixel 18 a. The second width W2 of the light collecting element 36 of the second pixel 18a is greater than the first width W1 of the light collecting element 36 of the first pixel 16 a. In some embodiments, the first width W1 of the light collection element 36 of the first pixel 16a is greater than 0. The third width W3 of the light collecting element 36 of the third pixel 20a is smaller than the width W of the third pixel 20 a. The light collecting element 36 of the third pixel 20a further extends over the patterned first organic layer 30, as shown in fig. 11. In addition, a first area A1 of the light collection element 36 of the first pixel 16a, a second area A2 of the light collection element 36 of the second pixel 18a, and a third area A3 of the light collection element 36 of the third pixel 20a are also defined. Similarly, the third area A3 of the light collecting element 36 of the third pixel 20a is larger than the second area A2 of the light collecting element 36 of the second pixel 18a, and the second area A2 of the light collecting element 36 of the second pixel 18a is larger than the first area A1 of the light collecting element 36 of the first pixel 16 a.

In fig. 11, in the first pixel 16a, the second pixel 18a, and the third pixel 20a, a first thickness T1 of the light collecting element 36 of the first pixel 16a, a second thickness T2 of the light collecting element 36 of the second pixel 18a, and a third thickness T3 of the light collecting element 36 of the third pixel 20a are defined. Notably, the third thickness T3 of the light collecting element 36 of the third pixel 20a is greater than the second thickness T2 of the light collecting element 36 of the second pixel 18 a. The second thickness T2 of the light collecting element 36 of the second pixel 18a is greater than the first thickness T1 of the light collecting element 36 of the first pixel 16 a. Furthermore, in fig. 11, the second thickness T2 of the light collecting element 36 of the second pixel 18a is greater than the thickness T of the second organic layer 34_L. In some embodiments, the second organic layer 34 may further cover the light collecting elements 36 (not shown) respectively located in the first pixel 16a, the second pixel 18a, and the third pixel 20 a.

In some embodiments, the refractive index of the patterned first organic layer 30 is approximately between 1.2 and 1.45. In some embodiments, the refractive index of the light collection element 36 is greater than the refractive index of the color filter 32. In some embodiments, the refractive index of the light collection element 36 is approximately between 1.6 and 1.9. In some embodiments, each of the center pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a further includes an oxide layer 38 covering the metal gate 28. In some embodiments, each of the central pixel 14a, the first pixel 16a, the second pixel 18a, and the third pixel 20a further includes an anti-reflection layer (anti-reflection layer)40 formed on the second organic layer 34. In some embodiments, the refractive index of the light collection element 36 is greater than the refractive index of the anti-reflective layer 40.

In the present invention, a light collecting element having a high refractive index (n is 1.6 to 1.9) with a specific size or position is provided on a color filter. For size requirements, the width (or thickness) of the light collecting elements disposed farther from the central pixel needs to be larger than the width (or thickness) of the light collecting elements disposed adjacent to the central pixel. For the requirement of position, the distance between the center point of the light collecting element far away from the central pixel and the center point of the pixel where the light collecting element is located (i.e. the distance of the light collecting element deviating from the center point of the pixel) needs to be larger than the distance between the center point of the light collecting element near the central pixel and the center point of the pixel where the light collecting element is located. It is noted that the direction of the deviation of the light collecting elements is opposite to the direction of the pixel arrangement. Furthermore, the deviation direction of the light collection element in the pixel can be changed correspondingly according to different pixel arrangement directions. Furthermore, the refractive index of the light collecting element is larger than the refractive index of the adjacent material. The specific light collecting element is arranged, so that the Quantum Efficiency (QE) peak value of the color filter can be greatly improved, and particularly the quantum efficiency peak value of the pixel positioned at the edge of the substrate can be improved.