Patent Description:
In recent years, camera modules which are developed rapidly and have been filled with the lives of modern people are applied in various fields such as portable electronic devices, head mounted devices, vehicle instruments and etc. Accordingly, the camera module and the image sensor are also flourished. However, as technology is more and more advanced, demands for the quality of the camera module of users have become higher and higher, wherein the micro lens arrays layer is one of the major factors of image quality.

<FIG> shows a schematic view of a camera module according to the prior art. <FIG> shows a picture of the micro lens arrays layer ML of the camera module in <FIG>. <FIG> shows a picture of stray light SL generated by the micro lens arrays layer ML of the camera module in <FIG>. <FIG> shows a schematic view of intensity simulation of stray light SL in <FIG>. In the prior art shown in <FIG>, when an imaging light L enters the camera module, an image sensor I of the camera module will cause light diffraction due to the micro lens arrays layer ML disposed on an object-side surface of the image sensor I. In the result, the imaging light L reflects between the micro lens arrays layer ML and an optical plat F along a light path L2 so as to generate stray light SL, and the paddle flare which can be one kind of stray light SL can affect image quality severely. Therefore, developing a camera module which can remove stray light effectively and improve light-gathering ability becomes an important and solving problem in industry.

The <CIT> discloses a laminate includes a first layer having first asperities and a second layer having second asperities. The first layer includes a plurality of structures constituting the first asperities. The plurality of structures are provided on the second asperities at a pitch less than or equal to the wavelength of light for the purpose of reducing reflection and have a plurality of orientations.

The <CIT> discloses an image pickup device comprising a photoelectric conversion section that is arranged on a semiconductor substrate, a moth-eye section that includes recesses and projections formed on a surface on a light incident side in the semiconductor substrate and has, when a cross section approximately parallel to a direction toward the photoelectric conversion section from the light incident side is viewed, a recessed portion protruding toward the side of the photoelectric conversion section, the recessed portion having a curvature or a polygonal shape. An insulation film that is arranged adjacent to and opposite to the photoelectric conversion section of the moth-eye section has a refractive index different from a refractive index of the semiconductor substrate.

The <CIT> discloses a sensor device comprising a semiconductor substrate on which a photodiode is formed, a filter included in a multilayer structure stacked on a light-receiving surface side of the semiconductor substrate, and a moth-eye structure arranged on an outermost surface above the filter.

The <CIT> discloses an anti-reflective coating for a substrate which includes an outer metal oxide layer with a refractive index greater than the refractive index of the substrate.

<NPL> discloses that nanostructure arrays have been developed as effective antireflective surfaces, which exhibit broadband and quasi-omnidirectional antireflective properties together with multifunctions.

According to one aspect of the present disclosure, a camera module includes an imaging lens assembly module and an image sensor. The image sensor is disposed on an image surface of the imaging lens assembly module and the image sensor includes a photoelectric converting layer, a micro lens arrays layer, a light filtering layer and an anti-reflecting layer. The photoelectric converting layer is for converting a light signal of an imaging light to an electric signal. The micro lens arrays layer is for converging an energy of the imaging light into the photoelectric converting layer. The light filtering layer is disposed between the photoelectric converting layer and the micro lens arrays layer, and the light filtering layer is for absorbing a light at a certain wavelength region of the imaging light. The anti-reflecting layer is disposed on a surface of at least one of the light filtering layer and the micro lens arrays layer, wherein the anti-reflecting layer includes an irregular nano-crystallite structure layer and an optical connecting layer. The optical connecting layer is connected to the irregular nano-crystallite structure layer and a top of the optical connecting layer partially contacts an air.

According to the camera module of the foregoing aspect, the anti-reflecting layer is disposed on an object-side surface of the micro lens arrays layer.

According to the camera module of the foregoing aspect, the anti-reflecting layer is disposed between the light filtering layer and the micro lens arrays layer.

According to the camera module of the foregoing aspect, the irregular nano-crystallite structure layer is made of metal oxide material.

According to the camera module of the foregoing aspect, when a material refractive index of the irregular nano-crystallite structure layer is Nc, a material refractive index of the optical connecting layer is Nf, and the following condition is satisfied: Nf < Nc.

According to the camera module of the foregoing aspect, when a height of the irregular nano-crystallite structure layer is Hc, a film thickness of the optical connecting layer is Hf, a total height of the anti-reflecting layer is H, and the following conditions are satisfied: Hf+Hc=H; and Hf < Hc.

According to the camera module of the foregoing aspect, when a film thickness of the optical connecting layer is Hf, and the following condition is satisfied: <NUM> < Hf < <NUM>.

According to the camera module of the foregoing aspect, when a height of the irregular nano-crystallite structure layer is Hc, and the following condition is satisfied: <NUM> < Hc < <NUM>.

According to one aspect of the present disclosure, an electronic device includes the aforementioned camera module.

According to one aspect of the present disclosure, a vehicle instrument includes the aforementioned camera module.

The present disclosure provides a camera module which includes an imaging lens assembly module and an image sensor. The image sensor is disposed on an image surface of the imaging lens assembly module and includes a photoelectric converting layer, a micro lens arrays layer, a light filtering layer and an anti-reflecting layer. The photoelectric converting layer is for converting a light signal of an imaging light to an electric signal. The micro lens arrays layer is for converging an energy of the imaging light into the photoelectric converting layer. The light filtering layer is disposed between the photoelectric converting layer and the micro lens arrays layer, and the light filtering layer is for absorbing a light at a certain wavelength region of the imaging light. The anti-reflecting layer is disposed on a surface of at least one of the light filtering layer and the micro lens arrays layer. The image sensor with the anti-reflecting layer can remove stray light effectively in the camera module so as to improve light-gathering ability. Moreover, transmittance of the light filtering layer and color rendition of the image sensor can be improved. Hence, the image quality can be improved.

Specifically, the photoelectric converting layer can include a photoelectric diode and a circuit structure. The photoelectric diode can be for converting a light signal to an electric signal. The circuit structure can be for transmitting and amplifying the electric signal.

The light filtering layer can be a two-dimensional array arranged by light filtering material with various wavelength regions. In detail, the light filtering layer can be arranged in the form of RGGB, and can also be arranged in the form of RYYB, but the present disclosure is not limited thereto. Hence, the light filtering layer can allow the light with the certain wavelength region to pass by, such as red light, yellow light, green light, blue light, infrared light or the combination thereof, but the present disclosure is not limited thereto.

The anti-reflecting layer can include an irregular nano-crystallite structure layer and an optical connecting layer, and the optical connecting layer is connected to the irregular nano-crystallite structure layer. Specifically, the irregular nano-crystallite structure layer can be made of metal oxide. In detail, the irregular nano-crystallite structure layer can be made of aluminum oxide (Al<NUM>O<NUM>). Hence, it is favorable for accelerating manufacturing process and mass production.

Or, the anti-reflecting layer can include an irregular nano structure layer. The irregular nano structure layer has a plurality of porous structures. Hence, the anti-reflecting layer can be formed by plasma etching.

Moreover, the anti-reflecting layer can include an optical multi-membrane stacking structure. A plurality of membrane layers are stacked alternately with high and low material refractive index differences to form the optical multi-membrane stacking structure, and the membrane layers are stacked alternately with high and low material refractive index differences at least three times. Specifically, the membrane layers with high material refractive index differences are made of aluminum oxide, the membrane layers with low material refractive index differences are made of silicon oxide (SiO<NUM>), but the present disclosure is not limited thereto. Hence, the anti-reflecting layer can be formed by Chemical Vapor Deposition or Physical Vapor Deposition.

The image sensor can further include a cover glass. An inner space layer is formed between the cover glass and the micro lens arrays layer, and the inner space layer is isolated from an outer space of the image sensor. The anti-reflecting layer is disposed on at least one surface of the cover glass, wherein the anti-reflecting layer includes an irregular nano-crystallite structure layer and an optical connecting layer, and the optical connecting layer is connected to the irregular nano-crystallite structure layer. Specifically, the cover glass can be a plate glass. The plate glass and a photosensitive chip can be assembled to a substrate to form the image sensor, the substrate can be a circuit substrate, but the present disclosure is not limited thereto.

The anti-reflecting layer can be disposed on an object-side surface of the micro lens arrays layer. Hence, possibility of generation of non-imaging light from a large angle can be decreased.

The anti-reflecting layer can be disposed between the light filtering layer and the micro lens arrays layer. Hence, color vision of the light filtering layer can be improved.

When a material refractive index of the irregular nano-crystallite structure layer is Nc, and a material refractive index of the optical connecting layer is Nf, the following condition can be satisfied: Nf < Nc. By disposing the irregular nano-crystallite structure layer with the higher material refractive index as an outer layer, transmittance can be improved so as to reduce the reflection of imaging light.

When a height of the irregular nano-crystallite structure layer is Hc, a film thickness of the optical connecting layer is Hf, and a total height of the anti-reflecting layer is H, the following conditions can be satisfied: Hf+Hc=H; and Hf < Hc. Hence, there is no spacing between the top of the optical connecting layer and the bottom of the irregular nano-crystallite structure layer, so that the two layers are connected to each other tightly and have the stronger structural stability.

When the film thickness of the optical connecting layer is Hf, the following condition can be satisfied: <NUM> < Hf < <NUM>. By disposing the optical connecting layer with a certain thickness, the coating yield rate and the optical transmittance of the irregular nano-crystallite structure layer can be improved.

When the height of the irregular nano-crystallite structure layer is Hc, the following condition can be satisfied: <NUM> < Hc < <NUM>. Hence, the height range which optically matches with the optical connecting layer can be provided.

A top of the optical connecting layer partially contacts an air. Hence, the optical matching of the optical interface between the optical connecting layer and the irregular nano-crystallite structure layer can be adjusted by cooperating with the overall of the irregular nano-crystallite structure layer as a tiny porous structure.

When a size of each of micro lens elements of the micro lens arrays layer is Dp, the following condition can be satisfied: <NUM> < Dp < <NUM>. Hence, the size of each of the micro lens elements with light-gathering and image resolving power can be provided.

When a number of the micro lens elements of the micro lens arrays layer is PN, the following condition can be satisfied: <NUM> million < PN < <NUM> billion. Hence, the camera module with high image resolution can be provided.

The camera module can further include a driving device which is for driving the image sensor. Via the configuration of the driving device, the driving ability of image stabilization can be provided on the image sensor. Hence, the function of image stability of the image sensor can be obtained.

The cover glass can include an object-side surface and an image-side surface, and the anti-reflecting layer is disposed on the object-side surface and the image-side surface of the cover glass. Hence, the reflection on the surfaces of the cover glass and the secondary reflection in the cover glass can be effectively reduced.

Each of the abovementioned features of the camera module can be utilized in various combinations for achieving the corresponding effects.

Specifically, the camera module can be a camera module applied for a vehicle, a mobile device or a head-mounted device, but the present disclosure is not limited thereto.

The anti-reflecting layer can be coated during any process in the manufacturing process of the image sensor. In detail, the coating process of the anti-reflecting layer can be done before the process of installing the photosensitive chip on the circuit substrate for coating the anti-reflecting layer on the photosensitive chip. Furthermore, the coating can be done during the manufacturing process of the whole wafer or the manufacturing process of the dies formed after wafer cutting. Or, when the cover glass is removed after packaging the dies, the coating can be done while the dies are exposed on the outer environment. Then, the cover glass is packaged again and the following manufacturing process of the photosensitive chip coated by the anti-reflecting layer is operated thereby; the coating process of the anti-reflecting layer can also be done after the process of installing the photosensitive chip on the circuit substrate for coating the anti-reflecting layer on the photosensitive chip. Furthermore, the photosensitive chip is installed on the circuit substrate in the form of dies, then the overall of the photosensitive chip and the circuit substrate is coated, the coating region is defined by a blocking plate according to requirements, and the following manufacturing process is operated thereby; the coating process of the anti-reflecting layer can also be done during the process which the photosensitive chip is installed on the circuit substrate and the wire bonding is completed. Furthermore, the photosensitive chip is connected to the circuit substrate via golden wires, then the overall of the wire bonded photosensitive chip and the circuit substrate is coated, and the following manufacturing process is operated thereby. The manufacturing process of the image sensor can include die bonding, wire bonding, packaging, circuit substrate inserting injection molding, cutting, but the present disclosure is not limited thereto. The manufacturing process of the wafer can include light sensing layer process, light filtering layer process, micro lens layer process, optical thin layer process, cover membrane layer process, meta-lens process, light blocking layer process, but the present disclosure is not limited thereto.

The present disclosure provides an electronic device including the aforementioned camera module.

The present disclosure provides a vehicle instrument including the aforementioned camera module.

<FIG> shows a schematic view of a camera module <NUM> according to the 1st example of the 1st embodiment of the present disclosure. As shown in <FIG>, the camera module <NUM> includes an imaging lens assembly module (its reference numeral is omitted), an optical plate <NUM> and an image sensor <NUM>. The imaging lens assembly module has an optical axis X. The optical plate <NUM> is disposed between the imaging lens assembly module and the image sensor <NUM>. The image sensor <NUM> is disposed on an image surface (not shown) of the imaging lens assembly module and includes a substrate <NUM>, a photoelectric converting layer <NUM> (shown in <FIG>), a micro lens arrays layer <NUM>, a light filtering layer <NUM> (shown in <FIG>) and an anti-reflecting layer <NUM> (shown in <FIG>). The photoelectric converting layer <NUM> is disposed on an object-side surface of the substrate <NUM>. The photoelectric converting layer <NUM> is for converting a light signal of an imaging light L to an electric signal. The micro lens arrays layer <NUM> is for converging an energy of the imaging light L into the photoelectric converting layer <NUM>. The light filtering layer <NUM> is disposed between the photoelectric converting layer <NUM> and the micro lens arrays layer <NUM>, and the light filtering layer <NUM> is for absorbing a light at a certain wavelength region of the imaging light L. When the imaging light enters the camera module, the image sensor with the anti-reflecting layer can remove stray light effectively in the camera module so as to improve light-gathering ability. Moreover, transmittance of the light filtering layer and color rendition of the image sensor can be improved. Hence, the image quality can be improved.

Specifically, the imaging lens assembly module can include a lens barrel <NUM> and a plurality of lens elements <NUM>. The lens elements <NUM> are disposed in the lens barrel <NUM>, and arranged in order from an object side of the imaging lens assembly module to an image side thereof. Moreover, other optical elements such as a light blocking sheet, a spacer, a retainer and etc. can be disposed in the lens barrel <NUM> on demand, but it will not be described herein.

<FIG> shows a schematic view of the image sensor <NUM> according to the 1st example of the 1st embodiment in <FIG>. <FIG> shows a picture of the micro lens arrays layer <NUM> captured by an electron microscope according to the 1st example of the 1st embodiment in <FIG>. <FIG> shows another picture of the micro lens arrays layer <NUM> captured by an electron microscope according to the 1st example of the 1st embodiment in <FIG>. <FIG> shows a picture of a cross-sectional side view of the image sensor <NUM> according to the 1st example of the 1st embodiment in <FIG>. It has to be specified that the image sensor of the 1st embodiment can provide two different structures of the image sensor <NUM> of the 1st example and the image sensor <NUM> (shown in <FIG>) of the 2nd example according to requirements of the optical design. The other elements and the configuration thereof in the 1st example and the 2nd example according to the 1st embodiment are the same, and it will not be described herein again.

The anti-reflecting layer <NUM> is disposed on a surface of at least one of the light filtering layer <NUM> and the micro lens arrays layer <NUM>, wherein the anti-reflecting layer <NUM> includes an irregular nano-crystallite structure layer <NUM> and an optical connecting layer <NUM>. The optical connecting layer <NUM> is connected to the irregular nano-crystallite structure layer <NUM>. As shown in <FIG> and <FIG>, in the 1st example, the anti-reflecting layer <NUM> is disposed on an object-side surface of the micro lens arrays layer <NUM>. <FIG> show a structure of each of micro lens elements <NUM> of the micro lens arrays layer <NUM> observed by the electronic telescope in different magnification.

Specifically, the irregular nano-crystallite structure layer <NUM> can be made of metal oxide; in the 1st example, the irregular nano-crystallite structure layer <NUM> is made of aluminum oxide. Moreover, the optical connecting layer <NUM> can be made of silicon oxide. Hence, it is favorable for accelerating manufacturing process and mass production.

In the 1st example, a top of the optical connecting layer <NUM> partially contacts an air; in other words, the surface which connects the optical connecting layer <NUM> and the irregular nano-crystallite structure layer <NUM> has an exposed portion <NUM> which contacts the air. Moreover, the overall of the irregular nano-crystallite structure layer <NUM> is taken as a tiny porous structure. Hence, the optical matching of the optical interface between the optical connecting layer <NUM> and the irregular nano-crystallite structure layer <NUM> can be adjusted.

The light filtering layer <NUM> can be a two-dimensional array arranged by light filtering material with various wavelength regions. In detail, the light filtering layer <NUM> can be arranged in the form of RGGB, and can also be arranged in the form of RYYB, but the present disclosure is not limited thereto. In the 1st example, the light filtering layer <NUM> is the two-dimensional array arranged by red, green and blue light filtering materials. Hence, the light filtering layer <NUM> can allow the light with the certain wavelength region to pass by.

In the 1st example, when a material refractive index of the irregular nano-crystallite structure layer <NUM> is Nc, a material refractive index of the optical connecting layer <NUM> is Nf, a height of the irregular nano-crystallite structure layer <NUM> is Hc, a film thickness of the optical connecting layer <NUM> is Hf, a total height of the anti-reflecting layer <NUM> is H, a size of each of micro lens elements <NUM> of the micro lens arrays layer <NUM> is Dp, and a number of micro lens elements <NUM> of the micro lens arrays layer <NUM> is PN, the conditions related to the parameters can be satisfied as the following Table <NUM>.

It is worth to be mentioned that the material refractive index Nc of the irregular nano-crystallite structure layer <NUM> is a material refractive index of the irregular nano-crystallite structure layer <NUM> which is made of aluminum oxide and presented in form of an optical membrane layer. When the irregular nano-crystallite structure layer <NUM> forms a thin membrane in form of the irregular nano-crystallite structure, a partial volume is replaced by the air because of the shape of the structure. In the result, the effective refractive index of the thin membrane varies to <NUM> according to the degree of rarefaction of the crystallite structure.

<FIG> shows a schematic view of an image sensor <NUM> according to the 2nd example of the 1st embodiment in <FIG>. As shown in <FIG>, in the 2nd example, the image sensor <NUM> includes a substrate <NUM>, a photoelectric converting layer <NUM>, a micro lens arrays layer <NUM>, a light filtering layer <NUM> and an anti-reflecting layer <NUM>. It has to be specified that the structure and the configuration of the substrate <NUM>, the photoelectric converting layer <NUM>, the light filtering layer <NUM> and the micro lens arrays layer <NUM> which are the same as the structure and the configuration of the substrate <NUM>, the photoelectric converting layer <NUM>, the light filtering layer <NUM> and the micro lens arrays layer <NUM> in the 1st example will not be described herein again.

The light filtering layer <NUM> is the two-dimensional array arranged by red, yellow and blue light filtering materials. Hence, the light filtering layer <NUM> can allow the light with the certain wavelength region to pass by.

The anti-reflecting layer <NUM> is disposed on a surface of at least one of the light filtering layer <NUM> and the micro lens arrays layer <NUM>, wherein the anti-reflecting layer <NUM> includes an irregular nano-crystallite structure layer <NUM> and an optical connecting layer <NUM>. The optical connecting layer <NUM> is connected to the irregular nano-crystallite structure layer <NUM>. Specifically, the irregular nano-crystallite structure layer <NUM> can be made of metal oxide; in the 2nd example, the irregular nano-crystallite structure layer <NUM> is made of aluminum oxide. Moreover, the optical connecting layer <NUM> can be made of silicon oxide. Hence, it is favorable for accelerating manufacturing process and mass production.

Specifically, the anti-reflecting layer <NUM> is disposed between the light filtering layer <NUM> and the micro lens arrays layer <NUM>, and the optical connecting layer <NUM> is disposed on an object-side surface of the light filtering layer <NUM>. Hence, color vision of the light filtering layer can be improved.

In the 2nd example, when a material refractive index of the irregular nano-crystallite structure layer <NUM> is Nc, a material refractive index of the optical connecting layer <NUM> is Nf, a height of the irregular nano-crystallite structure layer <NUM> is Hc, a film thickness of the optical connecting layer <NUM> is Hf, a total height of the anti-reflecting layer <NUM> is H, a size of each of micro lens elements <NUM> of the micro lens arrays layer <NUM> is Dp, and a number of micro lens elements <NUM> of the micro lens arrays layer <NUM> is PN, the conditions related to the parameters can be satisfied as the following Table <NUM>.

<FIG> shows a schematic view of another image sensor <NUM> not according to the invention. As shown in <FIG>, the image sensor <NUM> includes a substrate <NUM>, a photoelectric converting layer <NUM>, a micro lens arrays layer <NUM>, a light filtering layer <NUM> and an anti-reflecting layer (its reference numeral is omitted). It has to be specified that the structure and the configuration of the substrate <NUM>, the photoelectric converting layer <NUM>, the light filtering layer <NUM> and the micro lens arrays layer <NUM> which are the same as the structure and the configuration of the substrate <NUM>, the photoelectric converting layer <NUM>, the light filtering layer <NUM> and the micro lens arrays layer <NUM> in the 1st embodiment will not be described herein again.

The light filtering layer <NUM> is the two-dimensional array arranged by red, green and blue light filtering materials. Hence, the light filtering layer <NUM> can allow the light with the certain wavelength region to pass by.

The anti-reflecting layer is disposed on a surface of at least one of the light filtering layer <NUM> and the micro lens arrays layer <NUM>, wherein the anti-reflecting layer includes an irregular nano structure layer <NUM>. The irregular nano structure layer <NUM> has a plurality of porous structures. Hence, the anti-reflecting layer can be formed by plasma etching. Specifically, the anti-reflecting layer is disposed on an object-side surface of the micro lens arrays layer <NUM>. Hence, possibility of generation of non-imaging light from a large angle can be decreased.

An overall structure of the image sensor <NUM> is a curved structure. Specifically, an object-side surface of the image sensor <NUM> is a curved surface which is concave inward. When a size of each of micro lens elements of the micro lens arrays layer <NUM> is Dp, Dp = <NUM>; when a number of micro lens elements of the micro lens arrays layer <NUM> is PN, PN = <NUM> million.

<FIG> shows yet another schematic view of an image sensor <NUM> not according to the invention. As shown in <FIG>, the image sensor <NUM> includes a substrate <NUM>, a photoelectric converting layer <NUM>, a micro lens arrays layer <NUM>, a light filtering layer <NUM> and an anti-reflecting layer <NUM>. It has to be specified that the structure and the configuration of the substrate <NUM>, the photoelectric converting layer <NUM>, the light filtering layer <NUM> and the micro lens arrays layer <NUM> which are the same as the structure and the configuration of the substrate <NUM>, the photoelectric converting layer <NUM>, the light filtering layer <NUM> and the micro lens arrays layer <NUM> in the 1st embodment will not be described herein again.

The light filtering layer <NUM> is the two-dimensional array arranged by infrared light filtering materials. Hence, the light filtering layer <NUM> can allow the light with the certain wavelength region to pass by.

The anti-reflecting layer <NUM> is disposed on a surface of at least one of the light filtering layer <NUM> and the micro lens arrays layer <NUM>, wherein the anti-reflecting layer <NUM> includes an optical multi-membrane stacking structure (its reference numeral is omitted). A plurality of membrane layers <NUM>, <NUM> are stacked alternately with high and low material refractive index differences to form the optical multi-membrane stacking structure, and the membrane layers <NUM>, <NUM> are stacked alternately with high and low material refractive index differences at least three times. In detail, the membrane layers <NUM> are the membrane layers with high material refractive index differences, the membrane layers <NUM> are the membrane layers with low material refractive index differences, and a number of times of stacking is a number of interfaces formed between each of the membrane layers <NUM> and each of the membrane layers <NUM>. Specifically, the membrane layers <NUM> with high material refractive index differences are made of aluminum oxide, the membrane layers <NUM> with low material refractive index differences are made of silicon oxide, but the present disclosure is not limited thereto. The membrane layers <NUM>, <NUM> are stacked alternately with high and low material refractive index differences seven times. Hence, the anti-reflecting layer <NUM> can be formed by CVD or PVD.

When a size of each of micro lens elements of the micro lens arrays layer <NUM> is Dp, Dp = <NUM>; when a number of micro lens elements of the micro lens arrays layer <NUM> is PN, PN = <NUM> million.

<FIG> shows a schematic view of a camera module 10a according to the 2nd embodiment of the present disclosure. As shown in <FIG>, the camera module 10a includes an imaging lens assembly module (its reference numeral is omitted), an optical plate 120a, an image sensor 130a and a light folding element 140a. The imaging lens assembly module has an optical axis X. The optical plate 120a is disposed between the imaging lens assembly module and the image sensor 130a. The image sensor 130a is disposed on an image surface (not shown) of the imaging lens assembly module, the image sensor 130a can be any of the aforementioned image sensors <NUM>, <NUM> according to the 1st example and the 2nd example of the 1st embodiment, but the present disclosure is not limited thereto. The light folding element 140a is disposed on an object-side surface of the imaging lens assembly module and for folding a light path L1 of an imaging light to the optical axis X. When the imaging light enters the camera module, the image sensor with the anti-reflecting layer can remove stray light effectively in the camera module so as to improve light-gathering ability. Moreover, transmittance of the light filtering layer and color rendition of the image sensor can be improved.

Specifically, the imaging lens assembly module can include a lens barrel 111a and a plurality of lens elements 112a. The lens elements 112a are disposed in the lens barrel 111a, and arranged in order from an object side of the imaging lens assembly module to an image side thereof. Moreover, other optical elements such as a light blocking sheet, a spacer, a retainer and etc. can be disposed in the lens barrel 111a on demand, but it will not be described herein. Via the configuration of the imaging lens assembly module, the optical plate 120a, the image sensor 130a and the light folding element 140a, the camera module 10a can capture an image far away and magnify the image to high magnification so as to achieve the function of the telephoto camera.

<FIG> shows a schematic view of a camera module 10b according to the 3rd embodiment of the present disclosure. As shown in <FIG>, the camera module 10b includes an imaging lens assembly module (its reference numeral is omitted), an optical plate 120b and an image sensor 130b. The imaging lens assembly module has an optical axis X. The optical plate 120b is disposed between the imaging lens assembly module and the image sensor 130b. The image sensor 130b is disposed on an image surface (not shown) of the imaging lens assembly module, the image sensor 130b can be any of the aforementioned image sensors <NUM>, <NUM> according to the 1st example and the 2nd example of the 1st embodiment, but the present disclosure is not limited thereto. When the imaging light enters the camera module, the image sensor with the anti-reflecting layer can remove stray light effectively in the camera module so as to improve light-gathering ability. Moreover, transmittance of the light filtering layer and color rendition of the image sensor can be improved.

Specifically, the imaging lens assembly module can include a lens barrel 111b and a plurality of lens elements 112b. The lens elements 112b are disposed in the lens barrel 111b, and arranged in order from an object side of the imaging lens assembly module to an image side thereof. Moreover, other optical elements such as a light blocking sheet, a spacer, a retainer and etc. can be disposed in the lens barrel 111b on demand, but it will not be described herein. Via the configuration of the imaging lens assembly module, the optical plate 120b and the image sensor 130b, the camera module 10b can be applied for a vehicle instrument.

<FIG> shows a schematic view of a camera module 10c according to the 4th embodiment of the present disclosure. As shown in <FIG>, the camera module 10c includes an imaging lens assembly module (its reference numeral is omitted), an optical plate 120c and an image sensor <NUM>. The imaging lens assembly module has an optical axis X. The optical plate 120c is disposed between the imaging lens assembly module and the image sensor <NUM>. The image sensor <NUM> is disposed on an image surface (not shown) of the imaging lens assembly module, and the image sensor <NUM> includes a substrate <NUM>, a photoelectric converting layer <NUM> (shown in <FIG>), a micro lens arrays layer <NUM>, a light filtering layer <NUM> (shown in <FIG>), a cover glass <NUM> and two anti-reflecting layers <NUM>, <NUM> (shown in <FIG>). The photoelectric converting layer <NUM> is disposed on an object-side surface of the substrate <NUM>. The photoelectric converting layer <NUM> is for converting a light signal of an imaging light L to an electric signal. The micro lens arrays layer <NUM> is for converging an energy of the imaging light L into the photoelectric converting layer <NUM>. The light filtering layer <NUM> is disposed between the photoelectric converting layer <NUM> and the micro lens arrays layer <NUM>, and the light filtering layer <NUM> is for absorbing a light at a certain wavelength region of the imaging light L. An inner space layer <NUM> (shown in <FIG>) is formed between the cover glass <NUM> and the micro lens arrays layer <NUM>, and the inner space layer <NUM> is isolated from an outer space of the image sensor <NUM>. When the imaging light enters the camera module, the image sensor with the anti-reflecting layer can remove stray light effectively in the camera module so as to improve light-gathering ability. Moreover, transmittance of the light filtering layer and color rendition of the image sensor can be improved.

Specifically, the imaging lens assembly module can include a lens barrel 111c and a plurality of lens elements 112c. The lens elements 112c are disposed in the lens barrel 111c, and arranged in order from an object side of the imaging lens assembly module to an image side thereof. Moreover, other optical elements such as a light blocking sheet, a spacer, a retainer and etc. can be disposed in the lens barrel 111c according on demand, but it will not be described herein.

<FIG> shows a schematic view of the image sensor <NUM> according to the 4th embodiment in <FIG>. As shown in <FIG>, the anti-reflecting layer <NUM> is disposed on an object-side surface of the micro lens arrays layer <NUM>. The anti-reflecting layer <NUM> is disposed on at least one surface of the cover glass <NUM>. The anti-reflecting layer <NUM> includes an irregular nano-crystallite structure layer <NUM> and an optical connecting layer <NUM>. The anti-reflecting layer <NUM> includes an irregular nano-crystallite structure layer <NUM> and an optical connecting layer <NUM>. The optical connecting layers <NUM>, <NUM> are connected to the irregular nano-crystallite structure layers <NUM>, <NUM>, respectively.

Specifically, the irregular nano-crystallite structure layers <NUM>, <NUM> can be made of metal oxide; in the 4th embodiment, the irregular nano-crystallite structure layers <NUM>, <NUM> can be made of aluminum oxide. Moreover, the optical connecting layers <NUM>, <NUM> can be made of silicon oxide. Hence, it is favorable for accelerating manufacturing process and mass production.

Moreover, the cover glass <NUM> includes an object-side surface and an image-side surface, and the anti-reflecting layer <NUM> is disposed on the object-side surface and the image-side surface of the cover glass <NUM>. Hence, the reflection on the surfaces of the cover glass <NUM> and the secondary reflection in the cover glass <NUM> can be effectively reduced.

In the 4th embodiment, the cover glass <NUM> can be a plate glass. The plate glass and a photosensitive chip can be assembled to the substrate <NUM> to form the image sensor <NUM>, the substrate <NUM> can be a circuit substrate, but the present disclosure is not limited thereto.

In the 4th embodiment, when a material refractive index of the irregular nano-crystallite structure layers <NUM>, <NUM> is Nc, a material refractive index of the optical connecting layers <NUM>, <NUM> is Nf, a height of the irregular nano-crystallite structure layers <NUM>, <NUM> is Hc, a film thickness of the optical connecting layers <NUM>, <NUM> is Hf, a total height of the anti-reflecting layer <NUM> is H, a size of each of micro lens elements of the micro lens arrays layer <NUM> is Dp, and a number of micro lens elements of the micro lens arrays layer <NUM> is PN, the conditions related to the parameters can be satisfied as the following Table <NUM>.

<FIG> shows a schematic view of a camera module 10d according to the 5th embodiment of the present disclosure. As shown in <FIG>, the camera module 10d includes an imaging lens assembly module 110d, an optical plate 120d, an image sensor 130d and four driving devices 140d. The imaging lens assembly module 110d has an optical axis X. The optical plate 120d is disposed between the imaging lens assembly module 110d and the image sensor 130d. The image sensor 130d is disposed on an image surface (not shown) of the imaging lens assembly module 110d, the image sensor 130d can be any of the aforementioned image sensors <NUM>, <NUM> according to the 1st and the 2nd example of the 1st embodiment, but the present disclosure is not limited thereto. The driving devices 140d are driving the image sensor 130d. Via the configuration of the driving devices 140d, the driving ability of image stabilization can be provided on the image sensor 130d. Hence, the function of image stability of the image sensor 130d can be obtained.

<FIG> shows a schematic view of an electronic device <NUM> according to the 6th embodiment of the present disclosure. <FIG> shows another schematic view of the electronic device <NUM> according to the 6th embodiment in <FIG>. In <FIG> and <FIG>, the electronic device <NUM> according to the 6th embodiment is a smartphone, the electronic device <NUM> includes at least one camera module. In the 6th embodiment, a number camera module is three, wherein the three camera modules are an ultra-wide angle camera module <NUM>, a high-pixel camera module <NUM> and a telephoto camera module <NUM>, respectively. Furthermore, the camera modules can be any one according to the 1st embodiment to the 5th embodiment, but the present disclosure is not limited thereto. Hence, it is favorable for fulfilling a mass production and an appearance requirement of a camera module in the recent market of electronic devices.

Furthermore, the user can activate the capturing mode by a user interface <NUM> of the electronic device <NUM> wherein the user interface <NUM> according to the 6th embodiment can be a touch screen for displaying a screen and having a touch function, and the user interface <NUM> can be for manually adjusting field of view to switch the different camera modules. At this moment, the imaging lens assembly module of the camera module collects an imaging light on the image sensor and outputs electronic signals associated with images to an image signal processor (ISP) <NUM>.

Furthermore, the electronic device <NUM> can further include, but not be limited to, a display, a control unit, a storage unit, a random-access memory (RAM), a read-only memory (ROM), or the combination thereof.

<FIG> shows a schematic view of an image captured by the ultra-wide angle camera module <NUM> according to the 6th embodiment in <FIG>. In <FIG>, a larger ranged image can be captured via the ultra-wide angle camera module <NUM>, and the ultra-wide angle camera module <NUM> has a function for containing more views.

<FIG> shows a schematic view of an image captured by the high-pixel camera module <NUM> according to the 6th embodiment in <FIG>. In <FIG>, a certain ranged and high-pixel image can be captured via the high-pixel camera module <NUM>, and the high-pixel camera module <NUM> has a function for high resolution and low distortion.

<FIG> shows a schematic view of an image captured by the telephoto camera module <NUM> according to the 6th embodiment in <FIG>. In <FIG>, a far image can be captured and enlarged to a high magnification via the telephoto camera module <NUM>, and the telephoto camera module <NUM> has a function for a high magnification.

In <FIG>, when an image is captured via the camera module having various focal lengths and processed via a technology of an image processing, a zoom function of the electronic device <NUM> can be achieved.

<FIG> shows a schematic view of an electronic device <NUM> according to the 7th embodiment of the present disclosure. In <FIG>, the electronic device <NUM> according to the 7th embodiment is a smartphone, and the electronic device <NUM> includes at least one camera module. In the 7th embodiment, a number camera module is nine, wherein the three camera modules are two ultra-wide angle camera modules <NUM>, two wide angle camera modules <NUM>, two high-pixel camera modules <NUM> , two telephoto camera modules <NUM> and a time-of-flight (TOF) module <NUM>, respectively. Furthermore, the camera modules can be any one according to the 1st embodiment to the 5th embodiment, but the present disclosure is not limited thereto. Hence, it is favorable for fulfilling a mass production and an appearance requirement of a camera module in the recent market of electronic devices.

According to the specification of the electronic device <NUM>, the electronic device <NUM> can further include at least one auxiliary element (not shown). In the 7th embodiment, the auxiliary element is a flash module <NUM>. The flash module <NUM> is for compensating the color temperature. Hence, the camera module of the present disclosure can provide the better image capturing experience.

<FIG> shows a schematic view of a vehicle instrument <NUM> according to the 8th embodiment of the present disclosure. As shown in <FIG>, the vehicle instrument <NUM> includes a plurality of camera modules <NUM>. The camera modules <NUM> can be any one according to the 1st embodiment to the 5th embodiment, but the present disclosure is not limited thereto.

In the 8th embodiment, two of the camera modules <NUM> are located under two rear view mirrors on left and right side, respectively. The two camera modules <NUM> capture image information from a field of view θ. Specifically, the field of view θ can satisfy the following condition: <NUM> degrees < θ < <NUM> degrees. Hence, the image information in the regions of two lanes on left and right side can be captured.

Claim 1:
A camera module (<NUM>), comprising:
an imaging lens assembly module; and
an image sensor (<NUM>) disposed on an image surface of the imaging lens assembly module, and the image sensor (<NUM>) comprising:
a photoelectric converting layer (<NUM>) for converting a light signal of an imaging light (L) to an electric signal;
a micro lens arrays layer (<NUM>) for converging an energy of the imaging light (L) into the photoelectric converting layer(<NUM>);
a light filtering layer (<NUM>) disposed between the photoelectric converting layer (<NUM>) and the micro lens arrays layer (<NUM>), and the light filtering layer (<NUM>) for absorbing a light at a certain wavelength region of the imaging light (L); and
an anti-reflecting layer (<NUM>) disposed on a surface of at least one of the light filtering layer (<NUM>) and the micro lens arrays layer (<NUM>), wherein the anti-reflecting layer (<NUM>) comprises an irregular nano-crystallite structure layer (<NUM>) and an optical connecting layer (<NUM>), and the optical connecting layer (<NUM>) is connected to the irregular nano-crystallite structure layer (<NUM>);
characterized in that:
a top of the optical connecting layer (<NUM>) partially contacts an air.