Light sensor and electronic equipment

Abstract

The embodiment of the invention provides a light sensor and electronic equipment, the light sensor comprises at least one light gathering unit, at least one light blocking unit and a light sensing unit, each light gathering unit corresponds to at least one light blocking unit in the direction perpendicular to the light sensing plane of the light sensing unit, and the light sensing unit corresponds to at least one light blocking unit in the direction perpendicular to the light sensing plane of the light sensing unit. The light blocking unit corresponding to the light gathering unit is located between the light gathering unit and the light sensing plane, the light blocking unit is used for blocking gathered light rays from reaching the light sensing plane after first incident light in the incident light is gathered by the light gathering unit corresponding to the light blocking unit, and the included angle between the first incident light and the normal of the light sensing plane is smaller than an angle threshold value. The angle threshold value is smaller than 90 degrees, and the light sensing unit is used for detecting the illumination intensity of light reaching the light sensing plane. According to the light sensor provided by the embodiment of the invention, the illumination intensity of the detected small-angle incident light can be weakened, and the illumination intensity of the detected large-angle incident light is not changed, so that the influence of the incident angle of the light on the detected illumination intensity is reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of light sensors, and in particular to a light sensor and an electronic device. Background Art

[0002] Ambient light sensors are widely used in electronic devices such as smartphones. Ambient light sensors can detect the light intensity in the environment, so that electronic devices such as smartphones can automatically adjust the display screen brightness and other operations according to the light intensity detected by the ambient light sensor.

[0003] The existing ambient light sensor is arranged below the display screen of the electronic device to detect the light intensity in the direction where the display screen of the electronic device is located.

[0004] However, when the incident angle of light on the display screen is different, the light that passes through the display screen and reaches the ambient light sensor is different, resulting in different light intensities detected by the ambient light sensor when light with the same light intensity has different incident angles, making it impossible for the electronic device to obtain accurate light intensity, affecting the user experience. Summary of the invention

[0005] In view of this, embodiments of the present application provide a light sensor and an electronic device to at least partially solve the above problems.

[0006] According to a first aspect of an embodiment of the present application, a light sensor is provided, comprising: at least one light-focusing unit, at least one light-blocking unit and a photosensitive unit; in a direction perpendicular to a photosensitive plane of the photosensitive unit, each of the light-focusing units corresponds to at least one light-blocking unit, and the light-blocking unit corresponding to the light-focusing unit is located between the light-focusing unit and the photosensitive plane; after a first incident light in the incident light is focused by the light-focusing unit corresponding to the light-blocking unit, the light-blocking unit is used to block the focused light from reaching the photosensitive plane, and an angle between the first incident light and a normal to the photosensitive plane is less than an angle threshold, and the angle threshold is less than 90°; the photosensitive unit is used to determine the light intensity of the light reaching the photosensitive plane.

[0007] In a possible implementation, each of the light-focusing units corresponds to a light-blocking unit; the central axis of the light-focusing unit is perpendicular to the photosensitive plane, and the light-blocking unit corresponding to the light-focusing unit intersects with the central axis of the light-focusing unit; in a direction perpendicular to the photosensitive plane, the projection of the light-blocking unit corresponding to the light-focusing unit on the photosensitive plane is located within the projection of the light-focusing unit on the photosensitive plane.

[0008] In a possible implementation manner, the light sensor further includes: a dielectric layer; the dielectric layer is disposed between the light focusing unit and the light sensing unit, and the at least one light blocking unit is disposed in the dielectric layer.

[0009] In a possible implementation manner, the light sensor further includes: a first filter layer; the first filter layer is disposed between the medium layer and the photosensitive unit.

[0010] In a possible implementation, the dielectric layer includes: a first sub-dielectric layer and a second sub-dielectric layer; the light sensor further includes: a second filter layer; and the second filter layer is disposed between the first sub-dielectric layer and the second sub-dielectric layer.

[0011] In a possible implementation manner, the light sensor further includes: a packaging layer; the packaging layer is disposed on a surface of the medium layer, and the at least one light focusing unit is located in the packaging layer.

[0012] In a possible implementation, a refractive index of the focusing unit is greater than a refractive index of the encapsulation layer, and a difference between the refractive index of the focusing unit and the refractive index of the encapsulation layer is greater than a refractive index threshold, wherein the refractive index threshold is greater than or equal to 0.2.

[0013] In a possible implementation, the light-blocking unit includes a circular light-blocking unit, and in a direction perpendicular to the photosensitive plane, a central axis of the light-blocking unit corresponding to the light-focusing unit coincides with a central axis of the light-focusing unit.

[0014] In a possible implementation manner, the diameter range of the light blocking unit is [1 μm, 10 μm], and / or the height range of the light focusing unit is [0.5 μm, 8 μm].

[0015] In a possible implementation manner, the light sensor includes a plurality of light focusing units, and the plurality of light focusing units are arranged in an array.

[0016] In a possible implementation, the arrangement period of the focusing unit ranges from [4 μm, 40 μm], and the aperture of the focusing unit ranges from [4 μm, 40 μm], wherein the arrangement period is greater than or equal to the aperture of the focusing unit.

[0017] In a possible implementation, in a direction perpendicular to the photosensitive plane, a distance range between the light focusing unit and a lower surface of a light blocking unit corresponding to the light focusing unit is [5 μm, 30 μm], wherein the lower surface of the light blocking unit is opposite to the photosensitive plane.

[0018] In a possible implementation manner, the light sensor further includes: a light guiding layer, wherein the light guiding layer is disposed between the medium layer and the photosensitive unit.

[0019] In a possible implementation manner, the light blocking unit includes a light reflecting layer or a light absorbing layer.

[0020] In a possible implementation manner, the light focusing unit includes a lens.

[0021] According to a second aspect of the embodiments of the present application, an electronic device is provided, including: the light sensor as described in the first aspect.

[0022] According to the light sensor provided by the embodiment of the present application, the light sensor includes at least one light focusing unit, at least one light blocking unit and a photosensitive unit, wherein the light blocking unit is arranged between the light focusing unit and the photosensitive unit, and the first incident light whose angle with the normal of the photosensitive plane is less than an angle threshold is blocked by the light blocking unit after being focused by the light focusing unit and cannot irradiate the photosensitive unit, and the incident light whose angle with the normal of the photosensitive plane is greater than or equal to the angle threshold can normally irradiate the photosensitive unit after passing through the light focusing unit, thereby the light intensity of the small-angle incident light detected by the photosensitive unit becomes lower, while the light intensity of the large-angle incident light detected by the photosensitive unit remains unchanged, thereby when the photosensitive unit detects the light intensity of the incident light, under the condition of the same light intensity, the difference between the light intensity of the incident light with a large angle incident detected by the photosensitive unit and the light intensity of the incident light with a small angle incident is smaller, so that the light intensity detected by the light sensor is more accurate, and the electronic device can obtain the light intensity with higher accuracy, so that the corresponding operation can be performed through the light intensity with higher accuracy, which can improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 is a schematic diagram of a light sensor provided in an embodiment of the present application;

[0025] Figure 2 is a schematic diagram of light gathering provided in an embodiment of the present application;

[0026] Figure 3 is a schematic diagram of another light gathering method provided in an embodiment of the present application;

[0027] Figure 4is a schematic diagram of light incidence provided by an embodiment of the present application;

[0028] Figure 5 is a schematic diagram of another light sensor provided in an embodiment of the present application;

[0029] Figure 6 is a schematic diagram of a light sensor including a dielectric layer provided in an embodiment of the present application;

[0030] Figure 7 is a schematic diagram of a light sensor including a filter layer provided in an embodiment of the present application;

[0031] Figure 8 is a schematic diagram of another light sensor including a filter layer provided in an embodiment of the present application;

[0032] Fig. 9 is a schematic diagram of a light sensor including a packaging layer provided in an embodiment of the present application;

[0033] Fig.10 is a schematic diagram of a display screen provided in an embodiment of the present application;

[0034] Fig.11 is a top view of a light sensor provided in an embodiment of the present application;

[0035] Fig.12 is a top view of another light sensor provided in an embodiment of the present application;

[0036] Fig.13 is a schematic diagram of another light sensor provided in an embodiment of the present application;

[0037] Fig.14 is a schematic diagram of an electronic device provided in an embodiment of the present application;

[0038] Fig.15 It is a schematic diagram of the response rate of a photosensitive unit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the embodiments of the present application should fall within the scope of protection of the embodiments of the present application.

[0040] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0041] It should be understood that although the terms first, second, third, etc. may be used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0042] As mentioned above, ambient light sensors are widely used in electronic devices such as smartphones. Ambient light sensors can detect the light intensity in the environment, so that electronic devices such as smartphones can automatically adjust the display screen brightness according to the light intensity detected by the ambient light sensor. The existing ambient light sensor is set below the display screen of the electronic device to detect the light intensity in the direction of the display screen of the electronic device. However, when the incident angle of the light on the display screen is different, the light passing through the display screen to reach the ambient light sensor is different. For example, the amount of light reaching the ambient light sensor for the light incident at an angle of 0 degrees with the screen normal is m, and the amount of light reaching the ambient light sensor for the light incident at an angle of θ with the screen normal is m*cosθ, that is, the amount of light reaching the ambient light sensor for the light incident at a large angle is small, resulting in different light intensities detected by the ambient light sensor for the light with the same light intensity at different incident angles, making it impossible for the electronic device to perform corresponding operations according to the accurate light intensity, for example, it is impossible to accurately adjust the screen brightness of the electronic device, affecting the user experience.

[0043] The present application provides a light sensor, which includes at least one light-collecting unit, at least one light-blocking unit and a photosensitive unit, wherein the light-blocking unit is arranged between the light-collecting unit and the photosensitive unit, and the first incident light whose angle with the normal of the photosensitive plane is less than an angle threshold in the incident light is blocked by the light-blocking unit after being collected by the light-collecting unit and cannot irradiate the photosensitive unit, and the incident light whose angle with the normal of the photosensitive plane is greater than or equal to the angle threshold can normally irradiate the photosensitive unit after passing through the light-collecting unit, thereby the light intensity of the small-angle incident light detected by the photosensitive unit becomes lower, while the light intensity of the large-angle incident light detected by the photosensitive unit remains unchanged, thereby when the photosensitive unit detects the light intensity of the incident light, under the condition of the same light intensity, the difference between the light intensity of the incident light with a large angle incident detected by the photosensitive unit and the light intensity of the incident light with a small angle incident is smaller, so that the light intensity detected by the light sensor is more accurate, and the electronic device can obtain the light intensity with higher accuracy, so that the corresponding operation can be performed through the light intensity with higher accuracy, which can improve the user experience.

[0044] Figure 1 is a schematic diagram of a light sensor provided in an embodiment of the present application, such as Figure 1 As shown, the light sensor 100 includes at least one light-collecting unit 101, at least one light-blocking unit 102 and a photosensitive unit 103. In a direction perpendicular to the photosensitive plane of the photosensitive unit 103, each light-collecting unit 101 corresponds to at least one light-blocking unit 102. The light-blocking unit 102 corresponding to the light-collecting unit 101 is located between the light-collecting unit 101 and the photosensitive plane. The light-blocking unit 102 can block the collected light from reaching the photosensitive plane 103 after the first incident light in the incident light is collected by the light-collecting unit 101 corresponding to the light-blocking unit 102. The angle between the first incident light and the normal of the photosensitive plane is less than an angle threshold, and the angle threshold is less than 90°. The photosensitive unit 103 can determine the light intensity of the light reaching the photosensitive plane.

[0045] The light sensor 100 includes at least one light-collecting unit 101, at least one light-blocking unit 102 and a photosensitive unit 103. The light-blocking unit 102 is arranged between the light-collecting unit 101 and the photosensitive unit 103. At least one light-blocking unit 102 is included between each light-collecting unit 101 and the photosensitive unit 103. In one example, when a plurality of light-blocking units 102 are included between each light-collecting unit 101 and the photosensitive unit 103, the plurality of light-blocking units 102 can be arranged in parallel on the same plane and spliced ​​into a large light-blocking unit 102, or the plurality of light-blocking units 102 can be arranged in parallel and dispersed on the same plane, or the plurality of light-blocking units 102 can be arranged on different planes, which is not limited here.

[0046] The focusing unit 101 can focus light. Specifically, after the light is irradiated to the focusing unit 101, the light is refracted, resulting in a change in the transmission direction. Light irradiated at different positions of the focusing unit 101 will be focused. The light blocking unit 102 can block the focused light. Figure 2 is a schematic diagram of light gathering provided in an embodiment of the present application, such as Figure 2 As shown, after the light is transmitted to the light focusing unit 101, the light passing through the light focusing unit 101 is refracted, resulting in a change in the transmission direction of the light. The light blocking unit 102 is disposed between the light focusing unit 101 and the photosensitive unit 103 opposite to the light blocking unit 102. After the first incident light passes through the light focusing unit 101, it is refracted and changes its propagation direction. The light is irradiated on the light blocking unit 102, and is blocked by the light blocking unit 102 and cannot irradiate the photosensitive unit 103. The first incident light is a light whose angle with the normal of the photosensitive plane is less than the angle threshold, for example: Figure 2 , respectively, show the first incident light with an angle of α and the first incident light with an angle of 0°, i.e., vertical incidence. The angle α between the first incident light and the normal line is less than the angle threshold. Figure 3 is a schematic diagram of another light gathering method provided in an embodiment of the present application, such as Figure 3 As shown, the second incident light whose angle with the normal line of the photosensitive plane is greater than or equal to the angle threshold will not be blocked by the light blocking unit 102 after passing through the focusing unit 101, and will directly illuminate the photosensitive unit 103, that is, Figure 3 The angle β in is greater than or equal to the angle threshold. It should be understood that due to the characteristics of light, light with an angle of more than 90° with the normal of the photosensitive plane will not be irradiated onto the photosensitive plane, so the angle threshold is less than 90°.

[0047] The photosensitive unit 103 can detect the intensity of the light reaching the photosensitive plane of the photosensitive unit 103. It should be noted that, due to the existence of the light blocking unit 102, the first incident light whose angle with the normal line of the photosensitive plane is less than the angle threshold is blocked by the light blocking unit 102 after passing through the light focusing unit 101, while the second incident light whose angle with the normal line of the photosensitive plane is greater than or equal to the angle threshold will not be blocked by the light blocking unit 102 after passing through the light focusing unit 101, and can be directly irradiated onto the photosensitive plane.

[0048] It should also be noted that the photosensitive unit 103 of the light sensor 100 in the embodiment of the present application is not completely covered by at least one light-gathering unit 101. Therefore, part of the first incident light whose angle with the normal line of the photosensitive plane is less than the angle threshold does not pass through the light-gathering unit 101, but passes through the position where the light-gathering unit 101 is not provided and can be irradiated onto the photosensitive plane. For example: Figure 4 is a schematic diagram of a light incident light provided in an embodiment of the present application, such as Figure 4As shown, part of the first incident light with an angle of α passes through the gap between the focusing units 101 and irradiates the sightseeing plane. Therefore, the light sensor 100 in the embodiment of the present application reduces the amount of light reaching the photosensitive plane from the first incident light whose angle with the normal of the photosensitive plane is less than the angle threshold, rather than completely blocking the first incident light. For the second incident light whose angle with the normal of the photosensitive plane is greater than or equal to the angle threshold, the amount of light reaching the photosensitive plane remains unchanged. Therefore, while the light sensor 100 in the embodiment of the present application reduces the light intensity of the detected incident light with a small angle, the light intensity of the detected incident light with a large angle remains unchanged.

[0049] In the embodiment of the present application, the light sensor 100 includes at least one light-collecting unit 101, at least one light-blocking unit 102 and a photosensitive unit 103, wherein the light-blocking unit 102 is disposed between the light-collecting unit 101 and the photosensitive unit 103, and the first incident light whose angle with the normal line of the photosensitive plane is less than the angle threshold is collected by the light-collecting unit 101 and blocked by the light-blocking unit 102, and cannot be irradiated to the photosensitive unit 103, and the incident light whose angle with the normal line of the photosensitive plane is greater than or equal to the angle threshold can be normally irradiated to the photosensitive unit 103 after passing through the light-collecting unit 101, thereby the photosensitive unit 103 is 03 becomes lower, while the light intensity of the large-angle incident light detected by the photosensitive unit 103 remains unchanged. Therefore, when the photosensitive unit 103 detects the light intensity of the incident light, under the condition of the same light intensity, the difference between the light intensity of the incident light with a large angle incident detected by the photosensitive unit 103 and the light intensity of the incident light with a small angle incident is smaller, so that the light intensity detected by the light sensor 100 is more accurate, and the electronic device obtains the light intensity with higher accuracy, so that it can perform corresponding operations according to the light intensity with higher accuracy, which can improve the user experience.

[0050] Figure 5 is a schematic diagram of another light sensor provided in an embodiment of the present application, such as Figure 5 As shown, each light-focusing unit 101 corresponds to a light-blocking unit 102, the central axis of the light-focusing unit 101 is perpendicular to the photosensitive plane, and the light-blocking unit 102 corresponding to the light-focusing unit 101 intersects with the central axis of the light-focusing unit 101, and in the direction perpendicular to the photosensitive plane, the projection of the light-blocking unit 102 corresponding to the light-focusing unit 101 on the photosensitive plane is located within the projection of the light-focusing unit 101 on the photosensitive plane.

[0051] Only one light blocking unit 102 is disposed between each light focusing unit 101 and the photosensitive plane. The light blocking unit 102 may be a light blocking unit 102 of various shapes, for example, the light blocking unit 102 may be a square light blocking unit 102, a circular light blocking unit 102, etc. The light blocking unit 102 may be disposed at any position between the light focusing unit 101 and the photosensitive plane, for example, the light blocking unit 102 may be disposed at Figure 5 The light blocking unit 102 is arranged at the position of the solid line in FIG. Figure 5 The middle dotted line position does not contact the photosensitive plane, and the light blocking units 102 corresponding to different light focusing units 101 can be set at different positions.

[0052] It should be understood that since the light-blocking unit 102 needs to block incident light with a small angle, that is, to block the light of the first incident light whose angle with the normal of the photosensitive plane is less than the angle threshold after passing through the focusing unit 101, and the first incident light is generally concentrated around the central axis of the focusing unit 101 after passing through the focusing unit 101, the light-blocking unit 102 corresponding to the focusing unit 101 intersects with the central axis of the focusing unit 101. It should also be noted that since the second incident light whose angle with the normal of the photosensitive plane is greater than or equal to the angle threshold is generally concentrated at the edge of the focusing unit 101 after passing through the focusing unit 101, in the direction perpendicular to the photosensitive plane, the projection of the light-blocking unit 102 corresponding to the focusing unit 101 on the photosensitive plane is located within the projection of the focusing unit 101 on the photosensitive plane, that is, viewed from the focusing unit 101 toward the photosensitive plane, the light-blocking unit 102 does not exceed the corresponding focusing unit 101.

[0053] In the embodiment of the present application, each light-focusing unit 101 corresponds to a light-blocking unit 102, and the light-blocking unit 102 corresponding to the light-focusing unit 101 intersects with the central axis of the light-focusing unit 101, thereby making it possible to achieve blocking of the light generated after the first incident light passes through the light-focusing unit 101 by the light-blocking unit 102, that is, blocking small-angle incident light, and in the direction perpendicular to the photosensitive plane, the projection of the light-blocking unit 102 corresponding to the light-focusing unit 101 on the photosensitive plane is located within the projection of the light-focusing unit 101 on the photosensitive plane, thereby preventing the light-blocking unit 102 from blocking large-angle incident light, and preventing the light-blocking unit 102 from exceeding the light-focusing unit 101 so that the incident light at the position where the light-focusing unit 101 is not set is blocked by the light-blocking unit 102, thereby improving the accuracy of the light intensity detected by the light sensor 100.

[0054] Figure 6 is a schematic diagram of a light sensor including a dielectric layer provided in an embodiment of the present application, such as Figure 6As shown, the light sensor 100 further includes a dielectric layer 104 , which is disposed between the light focusing unit 101 and the light sensing unit 103 , and at least one light blocking unit 102 is disposed in the dielectric layer 104 .

[0055] The dielectric layer 104 is disposed between the light focusing unit 101 and the light sensing unit 103. In one example, Figure 6 As shown, the focusing unit 101 is arranged on the first surface of the dielectric layer 104, the photosensitive unit 103 is arranged on the second surface of the dielectric layer 104, and the light blocking unit 102 is arranged in the dielectric layer 104 and located between the focusing unit 101 and the photosensitive unit 103, that is, the light blocking unit 102 is arranged between the first surface and the second surface of the dielectric layer 104.

[0056] In the embodiment of the present application, a dielectric layer 104 is also included between the light focusing unit 101 and the photosensitive unit 103. The dielectric layer 104 can provide a light transmission medium. After filling the dielectric layer 104, the light refractive index of the light focusing unit 101 is similar to that of the dielectric layer 104, which can prevent the light propagation direction from changing after the light is emitted from the light focusing unit 101 due to the difference between the light refractive index of the air and the light refractive index of the light focusing unit 101. In addition, the dielectric layer 104 can seal the photosensitive plane of the photosensitive unit 103, which can prevent the photosensitive plane of the photosensitive unit 103 from being affected by foreign matter.

[0057] Figure 7 is a schematic diagram of a light sensor including a filter layer provided in an embodiment of the present application, such as Figure 7 As shown, the light sensor 100 further includes a first filter layer 1051 , which is disposed between the dielectric layer 104 and the photosensitive unit 103 .

[0058] The light sensor 100 also includes a first filter layer 1051, which is arranged between the dielectric layer 104 and the photosensitive unit 103. The first surface of the first filter layer 1051 contacts the second surface of the dielectric layer 104, and the second surface of the first filter layer 1051 contacts the photosensitive plane of the photosensitive unit 103. The first filter layer 1051 can be a color filter layer or an infrared filter layer, etc.

[0059] In the embodiment of the present application, the light sensor 100 also includes a first filter layer 1051, which is arranged between the dielectric layer 104 and the photosensitive unit 103, so that the light sensor 100 can detect the light intensity of specific light. When the first filter layer 1051 is a color filter layer, the light sensor 100 can detect the light intensity of infrared light. When the first filter layer 1051 is an infrared filter layer, the light sensor 100 can detect the light intensity of natural light, which can meet different detection requirements.

[0060] Figure 8 is a schematic diagram of another light sensor including a filter layer provided in an embodiment of the present application, such as Figure 8 As shown, the dielectric layer 104 includes a first sub-dielectric layer 1041 and a second sub-dielectric layer 1042 , and the light sensor 100 further includes a second filter layer 1052 , which is disposed between the first sub-dielectric layer 1041 and the second sub-dielectric layer 1042 .

[0061] The light sensor 100 may include a second filter layer 1052, which is disposed between the first sub-medium layer 1041 and the second sub-medium layer 1042. In one example, the light blocking unit 102 may be disposed in the first sub-medium layer 1041. Figure 8 As shown by the dashed line, the light blocking unit 102 can be disposed between the light focusing unit 101 and the second filter layer 1052. In another example, the light blocking unit 102 can be disposed in the second sub-medium layer 1042. Figure 8 As shown by the solid line, the light blocking unit 102 can be disposed between the second filter layer 1052 and the photosensitive plane of the photosensitive unit 103 .

[0062] It should be noted that when each light-focusing unit 101 corresponds to multiple light-blocking units 102, the light-blocking unit 102 corresponding to each light-focusing unit 101 can be arranged in the first sub-medium layer 1041 and / or the second sub-medium layer 1042; when each light-focusing unit 101 corresponds to a single light-blocking unit 102, the light-blocking unit 102 can be arranged in the first sub-medium layer 1041 or the second sub-medium layer 1042, and the light-blocking units 102 corresponding to different light-focusing units 101 can be arranged at different positions, for example: the light-blocking unit 102 corresponding to the first light-focusing unit 101 can be arranged in the first sub-medium layer 1041, and the light-blocking unit 102 corresponding to the second light-focusing unit 101 can be arranged in the second sub-medium layer 1042, and so on. When the light blocking unit 102 is disposed in the first sub-dielectric layer 1041 and / or the second sub-dielectric layer 1042, in the direction perpendicular to the photosensitive plane, the length of the first sub-dielectric layer 1041 and the second sub-dielectric layer 1042 is greater than the length of the light blocking unit 102, that is, the light blocking unit 102 is disposed in the first sub-dielectric layer 1041 and / or the second sub-dielectric layer 1042 and does not extend beyond the dielectric layer 104.

[0063] In the embodiment of the present application, the dielectric layer 104 includes: a first sub-dielectric layer 1041 and a second sub-dielectric layer 1042, and the light sensor 100 also includes a second filter layer 1052, which can enable the light sensor 100 to detect a specific light intensity. When the second filter layer 1052 is a color filter layer, the light sensor 100 can detect the light intensity of infrared light. When the second filter layer 1052 is an infrared filter layer, the light sensor 100 can detect the light intensity of natural light, which can meet different detection requirements.

[0064] Fig. 9 is a schematic diagram of a light sensor including a packaging layer provided in an embodiment of the present application, such as Fig. 9 As shown, the light sensor 100 further includes a packaging layer 106 . The packaging layer 106 is disposed on the surface of the medium layer 104 . At least one light focusing unit 101 is located in the packaging layer 106 .

[0065] The light sensor 100 also includes a packaging layer 106, which encapsulates the light-focusing unit 101, the dielectric layer 104 and the photosensitive unit 103. Each light-focusing unit 101 is located in the packaging layer 106. In the direction perpendicular to the photosensitive plane, the projections of the light-focusing unit 101, the dielectric layer 104, the light-blocking unit 102 and the photosensitive unit 103 are located in the projection of the packaging layer 106.

[0066] Fig.10 is a schematic diagram of a display screen provided in an embodiment of the present application, such as Fig.10 As shown, the light sensor 100 is disposed below the display screen 201 , and all the light-collecting units 101 are located in the encapsulation layer 106 . The encapsulation layer 106 covers the light-collecting units 101 , the dielectric layer 104 , the light-blocking units 102 and the light-sensing units 103 .

[0067] In the embodiment of the present application, the light sensor 100 further includes a packaging layer 106 , which is disposed on the surface of the dielectric layer 104 . Thus, the light sensor 100 can be packaged by the packaging layer 106 to prevent foreign matter from affecting the light sensor 100 , thereby improving the reliability of the light sensor 100 .

[0068] In a possible implementation, the refractive index of the focusing unit 101 is greater than the refractive index of the encapsulation layer 106, and the difference between the refractive index of the focusing unit 101 and the refractive index of the encapsulation layer 106 is greater than a refractive index threshold, wherein the refractive index threshold is greater than or equal to 0.2.

[0069] After the encapsulation layer 106 encapsulates the light sensor 100, a plurality of light-gathering units 101 are located in the encapsulation layer 106. At this time, in order to enable the light-gathering unit 101 to have the original light-gathering effect, the difference between the refractive index of the light-gathering unit 101 and the refractive index of the encapsulation layer 106 is greater than a refractive index threshold, and the refractive index threshold may be greater than or equal to 0.2. Specifically, when the refractive index of the light-gathering unit 101 is different from that of the encapsulation material, the light-gathering unit 101 may play a light-gathering role, i.e., gather the light passing through the light-gathering unit 101.

[0070] In one example, the focusing unit 101 can be made of a high refractive index material, that is, the focusing unit 101 is made of a material with a refractive index n>1.6, and the encapsulation layer 106 is made of a normal refractive index material, that is, the encapsulation layer 106 is made of a material with a refractive index of 1.4≤n≤1.6, but the difference between the refractive index of the focusing unit 101 and the refractive index of the encapsulation layer 106 needs to be greater than the refractive index threshold. In another example, the focusing unit 101 can be made of a normal refractive index material, that is, the focusing unit 101 is made of a material with a refractive index of 1.4≤n≤1.6, and then the encapsulation layer 106 is made of a low refractive index material, that is, The encapsulation layer 106 is made of a material with a refractive index n<1.4, but the difference between the refractive index of the focusing unit 101 and the refractive index of the encapsulation layer 106 needs to be greater than a refractive index threshold. In another example, the focusing unit 101 can be made of a high refractive index material, that is, the focusing unit 101 is made of a material with a refractive index n>1.6, and then the encapsulation layer 106 is made of a low refractive index material, that is, the encapsulation layer 106 is made of a material with a refractive index n<1.4, but the difference between the refractive index of the focusing unit 101 and the refractive index of the encapsulation layer 106 needs to be greater than a refractive index threshold. In one example, the refractive index threshold can be greater than or equal to 0.2.

[0071] In the embodiment of the present application, the refractive index of the focusing unit 101 is greater than the refractive index of the encapsulation layer 106, and the difference between the refractive index of the focusing unit 101 and the refractive index of the encapsulation layer 106 is greater than the refractive index threshold, so that the focusing unit 101 still has a focusing effect when it is located in the encapsulation layer 106, so that the first incident light whose angle with the normal of the photosensitive plane is less than the angle threshold can be focused to the position of the light blocking unit 102 after passing through the focusing unit 101, and the light blocking unit 102 can block the focused light from irradiating the photosensitive plane, thereby weakening the light intensity of the small-angle incident light detected by the photosensitive unit 103.

[0072] Fig.11 is a top view of a light sensor provided in an embodiment of the present application, such as Fig.11As shown, the light blocking unit 102 includes a circular light blocking unit 102 , and in a direction perpendicular to the photosensitive plane, the central axis of the light blocking unit 102 corresponding to the light focusing unit 101 coincides with the central axis of the light focusing unit 101 .

[0073] In an embodiment of the present application, the light blocking unit 102 includes a circular light blocking unit 102. In the direction perpendicular to the photosensitive plane, the central axis of the light blocking unit 102 corresponding to the light focusing unit 101 coincides with the central axis of the light focusing unit 101, thereby blocking the light that passes through the light focusing unit 101 and is gathered near the axis, thereby blocking the first incident light whose angle with the normal of the photosensitive plane is less than an angle threshold, and weakening the light intensity of the small-angle incident light detected by the photosensitive unit 103.

[0074] In a possible implementation, the diameter of the light blocking unit 102 is in the range of [1 μm, 10 μm], and / or the height of the light focusing unit 101 is in the range of [0.5 μm, 8 μm].

[0075] like Fig.11 As shown, when the light blocking unit 102 is circular, the diameter D of the light blocking unit 102 is in the range of [1 μm, 10 μm], and / or, as Fig. 9 As shown, the height H of the focusing unit 101 ranges from [0.5 μm, 8 μm], and the height of the focusing unit 101 is the distance from the top of the lens to the surface of the medium layer 104 in contact with the focusing unit 101. In a preferred example, the height of the focusing unit 101 ranges from [1 μm, 5 μm].

[0076] In the embodiment of the present application, the diameter range of the light blocking unit 102 is [1 μm, 10 μm], and / or the height range of the light focusing unit 101 is [0.5 μm, 8 μm]. The light collected by the light focusing unit 101 after the first incident light whose angle with the normal line of the photosensitive plane is less than the angle threshold can be successfully blocked by the light blocking unit 102, thereby weakening the light intensity of the small-angle incident light detected by the photosensitive unit 103, so as to improve the accuracy of the light intensity detected by the light sensor 100.

[0077] Fig.12 is a top view of another light sensor provided in an embodiment of the present application, such as Fig.12 As shown, the light sensor 100 includes a plurality of light focusing units 101 , and the plurality of light focusing units 101 are arranged in an array.

[0078] When the light sensor 100 includes a plurality of light focusing units 101, the plurality of light focusing units 101 are arranged in an array. Fig.12As shown, a plurality of light-focusing units 101 are arranged in a square periodic arrangement to form an array of the light-focusing units 101. It should be understood that since the first incident light whose angle with the normal of the photosensitive plane is less than the angle threshold will be blocked by the light-blocking unit 102 after passing through the light-focusing unit 101, there may be a certain distance between any adjacent light-focusing units 101, and the first incident light whose angle with the normal of the photosensitive plane is less than the angle threshold will illuminate the portion where no light-focusing unit is set, for example: any adjacent light-focusing units 101 or a position where no light-focusing unit is set can directly illuminate the photosensitive plane, thereby detecting the light intensity of the first incident light whose angle with the normal of the photosensitive plane is less than the angle threshold.

[0079] In the embodiment of the present application, the light sensor 100 includes a plurality of light focusing units 101 , and the plurality of light focusing units 101 are arranged in an array, thereby achieving the arrangement of a plurality of light focusing units 101 on the light sensor 100 .

[0080] In a possible implementation, the arrangement period of the focusing unit 101 ranges from [4 μm, 40 μm], and the aperture of the focusing unit 101 ranges from [4 μm, 40 μm], wherein the arrangement period is greater than or equal to the aperture of the focusing unit 101 .

[0081] The arrangement period of the focusing units 101 refers to the distance between the centers of two adjacent focusing units 101 in the array of the focusing units 101, and the aperture of the focusing units 101 refers to the effective light transmission diameter of the focusing units 101. The range of the arrangement period of the focusing units 101 is [4μm, 40μm], and the range of the aperture of the focusing units 101 is [4μm, 40μm]. It should be understood that since there may be a certain spacing between adjacent focusing units 101, and the spacing between adjacent focusing units 101 is equal to the difference between the arrangement period of the focusing units 101 and the aperture of the focusing units 101, the arrangement period needs to be greater than or equal to the aperture of the focusing units 101. In a preferred example, the range of the arrangement period of the focusing units 101 is [5μm, 25μm], the range of the aperture of the focusing units 101 is [5μm, 25μm], and the arrangement period is greater than or equal to the aperture of the focusing units 101.

[0082] In the embodiment of the present application, the arrangement period of the focusing units 101 ranges from [4μm, 40μm], and the aperture range of the focusing units 101 is [4μm, 40μm]. Thus, a plurality of focusing units 101 can be arranged in an array. When the arrangement period is greater than the aperture of the focusing units 101, a certain spacing can be made between any adjacent focusing units 101, so that part of the first incident light can pass through the spacing between adjacent focusing units 101 or the position where the focusing unit 101 is not set to illuminate the photosensitive plane of the photosensitive unit 103. When the arrangement period is equal to the aperture of the focusing unit 101, the focusing units 101 are closely arranged, so that part of the first incident light can pass through the gaps between a plurality of closely arranged focusing units 101 or the position where the focusing unit 101 is not set to illuminate the photosensitive plane of the photosensitive unit 103, so that the photosensitive unit 103 can detect the light intensity of the first incident light whose angle with the normal of the photosensitive plane is less than the angle threshold, thereby realizing the light intensity detection of small-angle incident light.

[0083] In a possible implementation, in a direction perpendicular to the photosensitive plane, the distance between the focusing unit 101 and the lower surface of the light blocking unit 102 corresponding to the focusing unit 101 ranges from [5 μm, 30 μm], wherein the lower surface of the light blocking unit 102 is opposite to the photosensitive plane.

[0084] The light blocking unit 102 is disposed inside the dielectric layer 104, and the light blocking unit 102 has a certain thickness. The light focusing unit 101 is disposed on the surface of the dielectric layer 104. The upper surface of the light blocking unit 102 is opposite to the light focusing unit 101, and the lower surface of the light blocking unit 102 is opposite to the photosensitive plane. The distance between the lower surface of the light blocking unit 102 and the light focusing unit 101 ranges from [5 μm, 30 μm]. For example: Fig. 9 The distance L to the center.

[0085] In one example, the dimensions of each component of the light sensor 100 may satisfy the following formulas (1) to (3):

[0086]

[0087] P_ulens is used to characterize the period of the focusing unit 101, CA_ulens is used to characterize the aperture of the focusing unit 101, H_ulens is used to characterize the height of the focusing unit 101, CD_ulens is used to characterize the spacing between adjacent focusing units 101, L is used to characterize the distance between the focusing unit 101 and the lower surface of the corresponding light blocking unit 102, D is used to characterize the diameter of the light blocking unit 102, and ROC_ulens is used to characterize the curvature radius of the focusing unit 101, wherein ROC_ulens can be calculated by the following formula (4):

[0088]

[0089] In the embodiment of the present application, the distance range between the focusing unit 101 and the lower surface of the light blocking unit 102 corresponding to the focusing unit 101 is [5μm, 30μm]. The light blocking unit 102 can be set in the dielectric layer 104. Since the light blocking unit 102 needs to block the light of the first incident light whose angle with the normal of the photosensitive plane is less than the angle threshold after passing through the focusing unit 101, and the focusing unit 101 will focus the light passing through the focusing unit 101 on the focal plane corresponding to the focusing unit 101, therefore, by adjusting the distance between the focusing unit 101 and the lower surface of the light blocking unit 102, the relative position between the light blocking unit 102 and the focal plane of the focusing unit 101 can be adjusted, so as to adjust the amount of light blocked by the light blocking unit 102, thereby blocking light as needed and adjusting the degree of attenuation of small-angle incident light.

[0090] Fig.13 is a schematic diagram of another light sensor provided in an embodiment of the present application, such as Fig.13 As shown, the light sensor 100 further includes a light guiding layer 107 , and the light guiding layer 107 is disposed between the medium layer 104 and the photosensitive unit 103 .

[0091] The light sensor 100 further includes a light guiding layer 107 or a light scattering layer. The light guiding layer 107 may be a light guiding body, such as a column, etc. The light focusing unit 101 and the light blocking unit 102 are arranged on the external light guiding body. It should be noted that, since the light focusing unit 101 and the light blocking unit 102 are arranged on the external light guiding body, the photosensitive unit 103 can be packaged separately, and the light focusing unit 101 does not need to be arranged in the packaging layer 106. It should be noted that, Fig.13 This is only an example and should not limit the embodiment in any way. The specific shape and location of the photosensitive unit 103 can be set as needed.

[0092] In the embodiment of the present application, the light sensor 100 also includes a light guiding layer 107, and the light guiding layer 107 is arranged between the medium layer 104 and the photosensitive unit 103, so that the light focusing unit 101 and the light blocking unit 102 can be arranged on the external light guide body, so that the photosensitive unit 103 is independently packaged, and the light focusing unit 101 and the light blocking unit 102 are arranged outside the photosensitive unit 103, which can reduce the thickness of the light sensor 100.

[0093] In a possible implementation, the light blocking unit 102 includes a light reflecting layer or a light absorbing layer.

[0094] The light-blocking unit 102 may include a reflective layer, which can reflect light to block the light. In one example, the reflective layer may be made of metal. For example, the metal traces of the photosensitive unit 103 or the metal layer in the photosensitive unit 103 may be used as the reflective layer. The light-blocking unit 102 may also include a light-absorbing layer, which can absorb light to block the light. In one example, the light-absorbing layer may be a black material or a coating. The black material or the coating may be set in the dielectric layer 104 and / or on the photosensitive plane surface of the photosensitive unit 103 to achieve the setting of the light-blocking unit 102.

[0095] In an embodiment of the present application, the light blocking unit 102 includes a reflective layer or a light absorbing layer, so that the light blocking unit 102 can block the light of the first incident light whose angle with the normal of the photosensitive plane is less than an angle threshold after passing through the focusing unit 101, thereby weakening the light intensity of the detected small-angle incident light, and the photosensitive unit 103 can detect the light intensity of the external ambient light more accurately.

[0096] In a possible implementation manner, the light focusing unit 101 includes a lens.

[0097] The focusing unit 101 may be a lens. In some other implementations, the focusing unit 101 may also be a device having a focusing function, such as a Fresnel zone plate and a super lens.

[0098] In the embodiment of the present application, the light focusing unit 101 includes a lens, thereby achieving the light focusing function of the light focusing unit 101 .

[0099] Fig.14 is a schematic diagram of an electronic device provided in an embodiment of the present application, such as Fig.14 As shown, the electronic device 200 includes the light sensor 100 of any of the above embodiments. In one example, the light sensor 100 can be set below the display screen of the electronic device 200, with the photosensitive plane opposite to the display screen, to detect the light intensity from the direction of the display screen. In another example, the light sensor 100 can be set at other positions in the electronic device 200 to detect the light intensity in the corresponding direction. The specific setting position is not limited here.

[0100] Fig.15 is a schematic diagram of a photosensitive unit response rate provided in an embodiment of the present application, such as Fig.15 As shown, Fig.15 (b) is the light response rate in the prior art, Fig.15 (a) is the photosensitive unit response rate using the embodiment of the present application, Fig.15 The vertical axis in is used to represent the response rate. Fig.15 The horizontal axis in is used to represent the angle between the incident light and the normal line of the photosensitive plane, such as Fig.15As shown, in the prior art, when incident light with an angle of 60° is irradiated, the response rate of the photosensitive unit is 47% of the response rate of the photosensitive unit when the incident light with an angle of 0° is irradiated, while after adopting the solution of the present application, when incident light with an angle of 60° is irradiated, the response rate of the photosensitive unit is 69% of the response rate of the photosensitive unit when the incident light with an angle of 0° is irradiated. In the prior art, when incident light with an angle of 70° is irradiated, the response rate of the photosensitive unit is 29% of the response rate of the photosensitive unit when the incident light with an angle of 0° is irradiated, while after adopting the solution of the present application, when incident light with an angle of 70° is irradiated, the response rate of the photosensitive unit is 47% of the response rate of the photosensitive unit when the incident light with an angle of 0° is irradiated. Therefore, it can be seen from the schematic diagram of the response rate of the photosensitive unit that the response rate of the photosensitive unit when incident light with a large angle is irradiated is significantly improved compared with the prior art, and the difference between the response rates of large-angle incident light and small-angle incident light is reduced.

[0101] It should be pointed out that, according to the needs of implementation, the various components / steps described in the embodiments of the present application can be split into more components / steps, or two or more components / steps or partial operations of components / steps can be combined into new components / steps to achieve the purpose of the embodiments of the present application.

[0102] Those of ordinary skill in the art will appreciate that the units and method steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present application.

[0103] The above implementation methods are only used to illustrate the embodiments of the present application, and are not limitations on the embodiments of the present application. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the embodiments of the present application. Therefore, all equivalent technical solutions also belong to the scope of the embodiments of the present application. The scope of patent protection of the embodiments of the present application should be limited by the claims.

Claims

1. A light sensor, characterized in that: include: at least one light focusing unit, at least one light blocking unit and a light sensing unit; In a direction perpendicular to the photosensitive plane of the photosensitive unit, each of the light-focusing units corresponds to at least one light-blocking unit, and the light-blocking unit corresponding to the light-focusing unit is located between the light-focusing unit and the photosensitive plane; The light blocking unit is used to block the first incident light in the incident light from reaching the photosensitive plane after the first incident light is concentrated by the light collecting unit corresponding to the light blocking unit, and the angle between the first incident light and the normal of the photosensitive plane is less than an angle threshold, and the angle threshold is less than 90°; The photosensitive unit is used to detect the light intensity of the light reaching the photosensitive plane.

2. The light sensor according to claim 1, characterized in that: Each of the light focusing units corresponds to one of the light blocking units; The central axis of the light-focusing unit is perpendicular to the photosensitive plane, and the light-blocking unit corresponding to the light-focusing unit intersects with the central axis of the light-focusing unit; In a direction perpendicular to the photosensitive plane, a projection of the light-blocking unit corresponding to the light-focusing unit on the photosensitive plane is located within a projection of the light-focusing unit on the photosensitive plane.

3. The light sensor according to claim 1, characterized in that: The light sensor further comprises: a dielectric layer; The medium layer is arranged between the light focusing unit and the light sensing unit, and the at least one light blocking unit is arranged in the medium layer.

4. The light sensor according to claim 3, characterized in that: The light sensor further comprises: a first light filter layer; The first filter layer is arranged between the medium layer and the photosensitive unit.

5. The light sensor according to claim 3, characterized in that: The dielectric layer comprises: a first sub-dielectric layer and a second sub-dielectric layer; The light sensor further comprises: a second filter layer; The second filter layer is disposed between the first sub-medium layer and the second sub-medium layer.

6. The light sensor according to claim 3, characterized in that: The light sensor further comprises: a packaging layer; The packaging layer is arranged on the surface of the medium layer, and the at least one light focusing unit is located in the packaging layer.

7. The light sensor according to claim 6, characterized in that: The refractive index of the focusing unit is greater than the refractive index of the encapsulation layer, and the difference between the refractive index of the focusing unit and the refractive index of the encapsulation layer is greater than a refractive index threshold, wherein the refractive index threshold is greater than or equal to 0.

2.

8. The light sensor according to claim 2, characterized in that: The light-blocking unit comprises a circular light-blocking unit, and in a direction perpendicular to the photosensitive plane, a central axis of the light-blocking unit corresponding to the light-focusing unit coincides with a central axis of the light-focusing unit.

9. The light sensor according to claim 8, characterized in that: The diameter range of the light blocking unit is [1 μm, 10 μm], and / or the height range of the light focusing unit is [0.5 μm, 8 μm].

10. The light sensor according to claim 1, characterized in that: The light sensor includes a plurality of light-gathering units, and the plurality of light-gathering units are arranged in an array.

11. The light sensor according to claim 10, characterized in that: The range of the arrangement period of the focusing unit is [4 μm, 40 μm], and the range of the aperture of the focusing unit is [4 μm, 40 μm], wherein the arrangement period is greater than or equal to the aperture of the focusing unit.

12. The light sensor according to claim 3, characterized in that: In a direction perpendicular to the photosensitive plane, a distance range between the light focusing unit and a lower surface of a light blocking unit corresponding to the light focusing unit is [5 μm, 30 μm], wherein the lower surface of the light blocking unit is opposite to the photosensitive plane.

13. The light sensor according to claim 3, characterized in that: The light sensor further includes a light guide layer, which is arranged between the medium layer and the photosensitive unit.

14. The light sensor according to any one of claims 1 to 13, characterized in that: The light blocking unit includes a light reflecting layer or a light absorbing layer.

15. The light sensor according to any one of claims 1 to 13, characterized in that: The light focusing unit includes a lens.

16. An electronic device, characterized in that: include: A light sensor as claimed in any one of claims 1 to 15.

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