Patent Description:
A silicon-based organic light emitting diode (silicon-based OLED) micro display uses a monocrystalline silicon chip as a base substrate, and a silicon-based OLED has a pixel size that is only one-tenth of a pixel size of a traditional display device. Therefore, the sophistication in the fabrication process of the silicon-based OLED micro display is much higher than that of the traditional display device. For example, a distance between pixels in the silicon-based OLED is only <NUM>, thus resulting in high process difficulty in fabrication of a color filter of a color silicon-based OLED display.

<CIT> discloses a method for producing a color filter for a transflective liquid crystal display device. The method comprises a bank forming step of forming a bank for partitioning a pattern of the colored layer on a transparent substrate, a transparent resin part-forming step of forming a transparent resin part in a pattern shape in a region partitioned by the bank on the transparent substrate and a colored layer-forming step of forming the colored layer in the pattern shape by ejecting a colored layer-forming composition into the region partitioned by the bank on the transparent substrate by the inkjet method so as to expose a transparent resin part surface.

<CIT> discloses a display unit and a production method for the display unit, wherein a color filter is patterned in a black-matrix-pattern and in a three-primary-color pattern and is formed by photosensitive layers respectively corresponding to three primary colors. The display unit comprises a display drive unit held between opposing electrodes at least one of which being patterned, and a color filter provided adjacent to the display drive unit, wherein the color filter is patterned in a black-matrix-pattern and in a three-primary-color pattern and is formed by photosensitive layers respectively corresponding to three primary colors. The display drive unit can be selected from among an electrophoresis device that provides an image-like contrast, an organic electroluminescence device and a liquid crystal display device.

<CIT> discloses a method for manufacturing a color filter. The method comprises making a side end face facing an upstream side of a printing direction into an inclined face of a horizontal muntin intersected with the printing direction of a color filter layer out of the black matrix layer, forming grooves connecting the upstream side of the printing direction with the downstream side on the horizontal muntin, roughing the surface of the black matrix layer, or providing holes or notches in a region of the color filter layer forming patterns and overlapped with the black matrix layer.

At least one embodiment of the present disclosure provides a display substrate, a method for fabricating the same, and a display device, which can improve product yield of silicon-based OLED devices.

An embodiment of the present disclosure provides a display substrate, including a base substrate and a plurality of pixel regions on one side of the base substrate, each of at least one pixel region of the plurality of pixel regions is provided with a color filter and an auxiliary portion, the color filter and the auxiliary portion are integrally formed, and a gas hole is provided in the auxiliary portion.

In some embodiments, the auxiliary portion is in a peripheral region of the color filter.

The display substrate further comprises a light-shielding pattern between at least two adjacent pixel regions of the plurality of pixel regions.

At least three adjacent pixel regions of the plurality of pixel regions are provided with color filters of different colors, which include a red filter, a green filter and a blue filter, and the light-shielding pattern includes a first portion, a second portion and a third portion sequentially stacked;.

Each of the first portion, the second portion and the third portion is provided with a gas hole.

In some embodiments, the first portion is adjacent to the first portion and integrally formed with the red filter.

In some embodiments, the base substrate includes a monocrystalline silicon chip.

The gas hole is a groove or a through hole.

In some embodiments, between the base substrate and the color filter, an insulation layer, a first electrode, an organic light emitting diode, a second electrode and a planarization layer are sequentially provided on the base substrate.

In some embodiments, the organic light emitting diode is a white organic light emitting diode.

As another technical solution, the present disclosure further provides a display device including any one of the above display substrates.

The present disclosure further provides a method for fabricating the above display substrate, including:
forming the color filter and the auxiliary portion on the base substrate by a single patterning process, such that the gas hole is formed in the auxiliary portion.

In some embodiments, forming the color filter and the auxiliary portion on the base substrate by a single patterning process such that the gas hole is formed in the auxiliary portion includes:.

In some embodiments, the method further includes:
forming a light-shielding pattern between any two adjacent color filters.

In some embodiments, the light-shielding pattern includes a black matrix, and any two adjacent pixel regions are provided with color filters of different colors;
forming the light-shielding pattern between at least two adjacent color filters includes:
forming the black matrix by a laser transfer process such that a gas hole is formed in the black matrix.

In some embodiments, at least three adjacent pixel regions of the plurality of pixel regions are provided with color filters of different colors, which include a red filter, a green filter and a blue filter, and the light-shielding pattern includes a first portion, a second portion and a third portion sequentially stacked; and
wherein forming the light-shielding pattern between any two adjacent color filters of the plurality of pixel regions and forming the color filter and the auxiliary portion on the base substrate by a single patterning process such that the gas hole is formed in the auxiliary portion are performed simultaneously, and include:.

In some embodiments, prior to forming the color filter and the auxiliary portion on the base substrate by a single patterning process such that the gas hole is formed in the auxiliary portion, the method further includes:
forming the bases substrate of a monocrystalline silicon chip.

In some embodiments, prior to forming the color filter and the auxiliary portion on the base substrate by a single patterning process such that the gas hole is formed in the auxiliary portion, the method further includes:
sequentially providing an insulation layer, a first electrode, an organic light emitting diode, a second electrode and a planarization layer on the base substrate.

Reference Numerals: <NUM>, color filter; <NUM>, red filter; <NUM>, green filter; <NUM>, blue filter; <NUM>, auxiliary portion; <NUM>, gas hole; <NUM>, light-shielding pattern; <NUM>, black matrix; <NUM>, first portion; <NUM>, second portion; <NUM>, third portion; <NUM>, base substrate; <NUM>, insulation layer; <NUM>, first electrode; <NUM>, organic light emitting diode; <NUM>, second electrode; <NUM>, planarization layer; <NUM>, color filter material; <NUM>, transfer sacrificial layer; <NUM>, transfer substrate; <NUM>, hollow-out pattern; <NUM>, bulge; <NUM>, photothermal conversion layer; <NUM>, transfer mask plate.

To make those skilled in the art better understand the technical solutions of the present disclosure, the present disclosure will be further described in detail below in conjunction with the accompanying drawings and specific implementations.

Referring to <FIG>, the present embodiment provides a display substrate including a base substrate <NUM> and a plurality of pixel regions on the base substrate <NUM>. Each of the plurality of pixel regions is provided with a color filter <NUM> and an auxiliary portion <NUM> corresponding to the color filter <NUM>. The color filter <NUM> and the auxiliary portion <NUM> are integrally formed. A gas hole <NUM> is provided in the auxiliary portion <NUM>.

Referring to <FIG>, the color filter <NUM> and the auxiliary portion <NUM> are connected to each other, and the auxiliary portion <NUM> is provided in a peripheral region of the color filter <NUM> and integrally formed with the color filter <NUM>, that is, the color filter <NUM> is made of the same material as the auxiliary portion <NUM>. The gas hole <NUM> is provided in the auxiliary portion <NUM> and can allow the generated gas to escape in the process of forming the color filter <NUM> and the auxiliary portion <NUM> by a laser transfer process, thus avoiding the occurrence of disuniform color filter <NUM> formed, and further improving product yield. By adopting a conventional coating method, however, it is easy to cause the color filters of various colors (R, G, B) to overlap, and because the material for forming the color filters is typically an organic material, gas will be generated in the process of forming the color filters, and the gas remains in the color filters and cannot escape therefrom, thereby resulting lowered product yield.

Needless to say, in the present disclosure, shape and size of the auxiliary portion <NUM> are not limited thereto as long as the gas hole <NUM> is formed inside the auxiliary portion <NUM>, which is not described herein. In the present embodiment, the reason why the laser transfer process is adopted to form the color filter <NUM> and the auxiliary portion <NUM> is that the color filter <NUM> and the auxiliary portion <NUM> can be formed at a predetermined position using a transfer plate by the laser transfer process, which can avoid overlapping of color filters <NUM> of various colors.

A light-shielding pattern <NUM> is provided between any two adjacent pixels (i.e., color filters).

It can be seen from <FIG> that the light-shielding pattern <NUM> is provided between two adjacent pixels to avoid light leakage or light mixing between two adjacent color filters <NUM>.

In the embodiment shown in <FIG> which is not part of the invention, the light-shielding pattern <NUM> includes a black matrix <NUM>.

It can be understood that, the black matrix <NUM> may also be formed by a laser transfer process because the black matrix <NUM> is typically made of a black resin material.

In some embodiments, a gas hole <NUM> is provided in the black matrix <NUM>.

The reason for providing the gas hole <NUM> in the black matrix <NUM> is also to allow the generated gas to escape in the process of forming the black matrix <NUM> by the laser transfer process.

Referring to <FIG>, the color filters <NUM> of different colors include a red filter <NUM>, a green filter <NUM>, and a blue filter <NUM>, and the light-shielding pattern <NUM> includes a first portion <NUM>, a second portion <NUM> and a third portion <NUM>, which are sequentially stacked. The red filter <NUM> and the first portion <NUM> are provided in a same layer and made of a same material. The green filter <NUM> and the second portion <NUM> are provided in a same layer and made of a same material. The blue filter <NUM> and the third portion <NUM> are provided in a same layer and made of a same material.

Specifically, the light-shielding pattern <NUM> includes the first portion <NUM>, the second portion <NUM> and the third portion <NUM>, which are sequentially stacked from bottom to top, and the first portion <NUM>, the second portion <NUM> and the third portion <NUM> stacked are provided between the red filter <NUM>, the green filter <NUM> and the blue filter <NUM>. After the first portion <NUM>, the second portion <NUM> and the third portion <NUM> are stacked, a black matrix-like structure can be formed, so as to block positions between two adjacent color filters and avoid light leakage or light mixing at positions between two adjacent color filters. The red filter <NUM> and the first portion <NUM> are provided in a same layer and made of a same material, that is, the red filter <NUM> and the first portion <NUM> may be formed simultaneously. Different from the red filter <NUM>, the green filter <NUM> and the second portion <NUM> are provided in a same layer and made of a same material. The term "being provided in a same layer" as used herein does not mean that both are in a same layer in the macroeconomic sense, but means that both are formed by a single patterning process, that is, the green filter <NUM> and the second portion <NUM> may be formed simultaneously, but are in different layers in the macroeconomic sense. The term "a single patterning process" as used herein refers to a process of using a mask plate to perform one exposure process, and then performing development, photoresist stripping, and the like. Similarly, the blue filter <NUM> and the third portion <NUM> are provided in a same layer and made of a same material, that is, the blue filter <NUM> and the third portion <NUM> may be formed simultaneously, but are in different layers in the macroeconomic sense. Therefore, the first portion <NUM>, the second portion <NUM> and the third portion <NUM> are not required to be formed in separate steps, respectively, thereby simplifying fabrication process of the display substrate and improving fabrication efficiency.

In the embodiment shown in <FIG>, the second portion <NUM> is provided on the first portion <NUM>, and the third portion <NUM> is provided on the second portion <NUM>. Each of the first portion <NUM>, the second portion <NUM> and the third portion <NUM> is provided with a gas hole <NUM>. The reason for providing the gas hole <NUM> in each of the first portion <NUM>, the second portion <NUM> and the third portion <NUM> is to allow the generated gas to escape in the process of forming the first portion <NUM>, the second portion <NUM> and the third portion <NUM> by a laser transfer process and thus to improve product yield.

It should be noted that, the gas hole <NUM> adopted in the embodiment may be a groove, that is, the gas hole <NUM> has a depth less than a thickness of the auxiliary portion <NUM>, the first portion <NUM>, the second portion <NUM> or the third portion <NUM>. Alternatively, the gas hole <NUM> may be a through hole, that is, the gas hole <NUM> has a depth equal to a thickness of the auxiliary portion <NUM>, the first portion <NUM>, the second portion <NUM> or the third portion <NUM>.

In some embodiments, the first portion <NUM> is integrally formed with the red filter <NUM> and adjacent to the first portion <NUM>.

In the present embodiment, because the first portion <NUM> and the red filter <NUM> are formed simultaneously, the first portion <NUM> formed adjacent to the red filter <NUM> may be formed integrally with the red filter <NUM>. In this case, the first portion <NUM> is the auxiliary portion <NUM> connected to the red filter <NUM>, and the gas hole <NUM> is formed in the first portion <NUM>, which can simplify fabrication process and improve fabrication efficiency.

Referring to <FIG>, the base substrate <NUM> includes a monocrystalline silicon chip. In other words, the display substrate of the present embodiment is a display substrate with a silicon base substrate.

An insulation layer <NUM>, a first electrode <NUM>, an organic light emitting diode <NUM>, a second electrode <NUM> and a planarization layer <NUM> are sequentially provided from bottom to top between the base substrate <NUM> and the color filter <NUM>.

In some embodiments, the organic light emitting diode <NUM> is a white organic light emitting diode. The reason for this arrangement is that, the red filter <NUM>, the green filter <NUM> and the blue filter <NUM> are provided on the planarization layer <NUM>, and thus, the display substrate can operates normally as long as the organic light emitting diode <NUM> can emit white light. It can be understood that, an anode, a cathode and a light emitting layer between the anode and the cathode are provided in the organic light emitting diode <NUM>, which is not described here.

The display substrate of the present embodiment includes the base substrate <NUM> and the color filter <NUM> and the auxiliary portion <NUM> on the base substrate <NUM>, the color filter <NUM> and the auxiliary portion <NUM> are integrally formed, and the gas hole <NUM> is provided in the auxiliary portion <NUM>. Because the color filter <NUM> and the auxiliary portion <NUM> are integrally formed, during the formation of the color filter <NUM> and the auxiliary portion <NUM>, the gas hole <NUM> provided in the auxiliary portion <NUM> can allow the gas generated in the process of forming the color filter <NUM> and the auxiliary portion <NUM> by a transfer process using a transfer material to escape, thereby forming a more uniform color filter <NUM> and further improving product yield.

This embodiment provides a display device including the display substrate.

The display device may be any product or component with a display function, such as a liquid crystal display panel, an electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator or the like.

The display device of this embodiment includes the display substrate.

Because the color filter and the auxiliary portion are integrally formed, during the formation of the color filter and the auxiliary portion, the gas hole provided in the auxiliary portion can allow the gas generated in the process of forming the color filter and the auxiliary portion by a transfer process using a transfer material to escape, thereby forming a more uniform color filter and further improving product yield.

Referring to <FIG>, this embodiment provides a method for fabricating a display substrate, which includes steps S01, S02, S1 and S2.

Referring to <FIG>, at step S01, a base substrate <NUM> of a monocrystalline silicon chip, is provided.

Referring to <FIG>, at step S02, an insulation layer <NUM>, a first electrode <NUM>, an organic light emitting diode <NUM>, a second electrode <NUM> and a planarization layer <NUM> are sequentially provided on the base substrate <NUM>.

In some embodiments, the organic light emitting diode <NUM> is white organic light emitting diode.

It can be understood that, the step of forming the above structures may be performed by using known techniques and materials, and is not described here.

At step S1, color filters and auxiliary portions are formed on the planarization layer by a single patterning process, such that a gas hole is formed in the auxiliary portion.

Step S1 includes: sequentially providing a color filter material <NUM>, a transfer sacrificial layer <NUM> and a transfer substrate <NUM> on the base substrate, hollow-out patterns <NUM> and bulges <NUM> being provided at predetermined positions of the transfer substrate <NUM>; irradiating light to corresponding positions of the transfer sacrificial layer <NUM> via the hollow-out patterns <NUM> and the bulges <NUM>; melting the transfer sacrificial layer <NUM> by heat so that the color filter material <NUM> corresponding to the hollow-out patterns <NUM> is transferred to predetermined positions on the base substrate to form the color filters and the auxiliary portions, and the bulges <NUM> allow the gas holes to be formed in the auxiliary portions.

Referring to <FIG>, the transfer substrate <NUM> is made of a light tight material, and only the hollow-out patterns <NUM> in the transfer substrate <NUM> allow light to pass therethrough. A position corresponding to each hollow-out pattern <NUM> is provided with one bulge <NUM>, and the bulge <NUM> blocks light. At this time, the color filter material <NUM> is a red filter material. Light (as shown by arrows) is irradiated on the transfer substrate <NUM> and allowed to pass only at positions corresponding to the hollow-out patterns <NUM>. Light is then irradiated onto the transfer sacrificial layer <NUM>, the material of the transfer sacrificial layer <NUM> is melted by light (or heat), and the red filter material corresponding to the hollow-out patterns <NUM> is transferred onto the planarization layer <NUM>. Subsequently, the material of the transfer sacrificial layer <NUM> is removed by means of light irradiation, dissolution, or the like, so that the red filters <NUM> and the auxiliary portions integrally formed with the red filters <NUM> are formed at the predetermined positions on the planarization layer <NUM>. At the same time, because the red filter material at positions corresponding to the bulges <NUM> will not be transferred onto the planarization layer <NUM>, the gas holes will be formed in the auxiliary portions.

Next, referring to <FIG>, a color filter material <NUM>, which is a green filter material, is provided on the base substrate. Through the same steps as above, green filters <NUM>, the auxiliary portions formed integrally with the green filters <NUM> and the gas holes are formed on the planarization layer <NUM>.

Next, referring to <FIG>, a color filter material <NUM>, which is a blue filter material, is provided on the base substrate. Through the same steps as above, blue filters <NUM>, the auxiliary portions formed integrally with the blue filters <NUM> and the gas holes are formed on the planarization layer <NUM>.

It should be noted that, <FIG> are only for schematically illustrating a process of forming the color filters, and do not illustrate specific structures of the auxiliary portion and the gas hole. The bulges <NUM> formed in this embodiment penetrate through the entire thickness of the transfer sacrificial layer <NUM>, and in this case, the gas hole is formed as a groove. The bulges may also penetrate through an overall thickness of the transfer sacrificial layer <NUM> and the color filter material <NUM>, and in this case, the gas hole is formed as a through hole.

At step S2, a light-shielding pattern is formed between any two adjacent color filters.

In some embodiments of the method, the light-shielding pattern includes a black matrix <NUM>.

Referring to <FIG>, step S2 includes: forming a black matrix <NUM> by a laser transfer process, and forming gas holes in the black matrix <NUM>. The black matrix <NUM> and the gas holes in the black matrix <NUM> may be formed using a same method as the color filters, and it is only necessary to change the color filter material <NUM> to a black matrix material. Detailed description thereof will not be repeated here.

It should be noted that the sequence of steps S <NUM> and S2 is not limited thereto, and may be reversed, which is not described here.

Apparently, various modifications may be made to steps of forming the color filters, the auxiliary portions and the light-shielding patterns in the embodiment.

In one example, step S1 includes: sequentially providing the color filter material <NUM>, a photothermal conversion layer <NUM> and the transfer substrate <NUM> on the base substrate, hollow-out patterns <NUM> being provided at predetermined positions of the transfer substrate <NUM>, and bulges <NUM> being provided on the photothermal conversion layer <NUM>; irradiating light to corresponding positions of the photothermal conversion layer <NUM> via the hollow-out patterns <NUM>; converting, by the photothermal conversion layer <NUM>, the light into heat, so that the color filter material <NUM> corresponding to the hollow-out patterns <NUM> is transferred to predetermined positions on the base substrate to form the color filters and the auxiliary portions, and the bulges <NUM> allows the gas holes to be formed in the auxiliary portions.

The color filters include red filters <NUM>, green filters <NUM> and blue filters <NUM>. The light-shielding pattern includes a first portion <NUM>, a second portion <NUM> and a third portion <NUM>, which are stacked on each other.

Steps S1 and S2 may be performed at the same time, and include:
as shown in <FIG>, forming the red filters <NUM> and the first portions <NUM> by one laser transfer process, and forming the gas holes in the first portions <NUM>.

Specifically, the transfer substrate <NUM> is made of a light tight material, and only the hollow-out patterns <NUM> in the transfer substrate <NUM> allow light to pass therethrough. A position corresponding to each hollow-out pattern <NUM> on the photothermal conversion layer <NUM> is provided with one bulge <NUM>, and the bulge <NUM> blocks light. At this time, the color filter material <NUM> is a red filter material. Light (as shown by arrows) is irradiated on the transfer substrate <NUM> and allowed to pass only at positions corresponding to the hollow-out patterns <NUM>. Light is then irradiated onto the photothermal conversion layer <NUM>. The photothermal conversion layer <NUM> converts the light into heat, which causes the red filter material corresponding to the hollow-out patterns <NUM> to be transferred onto the planarization layer <NUM>. In this way, the red filters <NUM>, the auxiliary portions integrally formed with the red filters <NUM> and the first portions <NUM> are formed at the predetermined positions on the planarization layer <NUM>. At the same time, because the red filter material at positions corresponding to the bulges <NUM> will not be transferred onto the planarization layer <NUM>, the gas holes will be formed in the auxiliary portions and the first portions <NUM>.

In some embodiments, the first portion <NUM> is the auxiliary portion <NUM> that is integrally formed with the red filter <NUM> and adjacent to the first portion <NUM>.

In the present embodiment, because the first portion <NUM> and the red filter <NUM> are formed simultaneously, the first portion <NUM> formed adjacent to the red filter <NUM> may be formed integrally with the red filter <NUM>. In this case, the first portion <NUM> is the auxiliary portion <NUM> connected to the red filter <NUM>, and the gas hole <NUM> may be formed in the first portion <NUM>, which can simplify fabrication process and improve fabrication efficiency.

Referring to <FIG>, the green filters <NUM> and the second portions <NUM> are formed by one laser transfer process, and the gas holes are formed in the second portions <NUM>. In this case, the color filter material <NUM> is a green filter material, and the green filters <NUM>, the auxiliary portions integrally formed with the green filters <NUM>, the second portions <NUM> and the gas holes are formed on the planarization layer <NUM> through the same steps as above.

Referring to <FIG>, the blue filters <NUM> and the third portions <NUM> are formed by one laser transfer process, and the gas holes are formed in the third portions <NUM>. In this case, the color filter material <NUM> is a blue filter material, and the blue filters <NUM>, the auxiliary portions integrally formed with the blue filters <NUM>, the third portions <NUM> and the gas holes are formed on the planarization layer <NUM> through the same steps as above.

In another example, step S1 includes: sequentially providing the color filter material <NUM>, a photothermal conversion layer <NUM> and the transfer substrate <NUM> and a transfer mask plate <NUM> on the base substrate, the transfer substrate <NUM> being made of a transparent material, hollow-out patterns <NUM> being provided at predetermined positions of the transfer mask plate <NUM>, and bulges being provided on the photothermal conversion layer <NUM>; irradiating light to corresponding positions of the photothermal conversion layer <NUM> via the hollow-out patterns <NUM> and the transfer substrate <NUM> corresponding to the hollow-out patterns; converting, by the photothermal conversion layer <NUM>, the light into heat, so that the color filter material <NUM> corresponding to the hollow-out patterns <NUM> is transferred to predetermined positions on the base substrate to form the color filters and the auxiliary portions, and the bulges allows the gas holes to be formed in the auxiliary portions.

The above step S1 differs from the step S1 in previous example in that the transfer substrate <NUM> is transparent and allows light to pass therethrough, the hollow-out patterns <NUM> are provided in the transfer mask plate <NUM> above the transfer substrate <NUM>, and light is irradiated to corresponding positions of the photothermal conversion layer <NUM> after passing through the hollow-out patterns <NUM> and the transfer substrate <NUM> corresponding to the hollow-out patterns <NUM>, so that the color filter material <NUM> corresponding to the hollow-out patterns <NUM> is transferred to predetermined positions on the base substrate.

Because the color filters and the auxiliary portions are integrally formed, during the formation of the color filters and the auxiliary portions, the gas holes provided in the auxiliary portions can allow the gas generated in the process of forming the color filters and the auxiliary portions by a transfer process using a transfer material to escape, thereby forming more uniform color filters and further improving product yield.

To sum up, in the display substrate, the fabrication method thereof, and the display device of the present disclosure, the display substrate includes the base substrate and the color filters and the auxiliary portions on the base substrate, the color filters and the auxiliary portions are integrally formed, and the gas holes are provided in the auxiliary portions. Because the color filters and the auxiliary portions are integrally formed, during the formation of the color filters and the auxiliary portions, the gas holes provided in the auxiliary portions can allow the gas generated in the process of forming the color filters and the auxiliary portions by a transfer process using a transfer material to escape, thereby forming more uniform color filters and further improving product yield.

Claim 1:
A display substrate, comprising a base substrate (<NUM>) and a plurality of pixel regions on one side of the base substrate (<NUM>),
wherein each of at least one pixel region of the plurality of pixel regions is provided with a color filter (<NUM>) and an auxiliary portion (<NUM>), the color filter (<NUM>) and the auxiliary portion (<NUM>) are integrally formed, and a gas hole (<NUM>) is provided in the auxiliary portion (<NUM>),
the display substrate further comprises a light-shielding pattern (<NUM>) between at least two adjacent pixel regions of the plurality of pixel regions,
wherein at least three adjacent pixel regions of the plurality of pixel regions are provided with color filters of different colors, which comprise a red filter (<NUM>), a green filter (<NUM>) and a blue filter (<NUM>), and the light-shielding pattern (<NUM>) comprises a first portion (<NUM>), a second portion (<NUM>) and a third portion (<NUM>) sequentially stacked;
characterised in that
the red filter (<NUM>) and the first portion (<NUM>) are formed simultaneously and made of a same material;
the green filter (<NUM>) and the second portion (<NUM>) are formed simultaneously and made of a same material; and
the blue filter (<NUM>) and the third portion (<NUM>) are formed simultaneously and made of a same material,
each of the first portion (<NUM>), the second portion (<NUM>) and the third portion (<NUM>) is provided with a gas hole (<NUM>), and
the gas hole (<NUM>) is a groove or a through hole.