Stylus and electronic device

Abstract

The present application relates to the technical field of electronic device accessories, and provides a stylus and an electronic device. The stylus comprises a housing, and a light-emitting device, a photodetector, a first light reflecting structure, and a second light reflecting structure provided in the housing; the photodetector is provided on an optical path of the light-emitting device; the first light reflecting structure is located on the optical path of the light-emitting device, and the first light reflecting structure is used for reflecting light from the light-emitting device; and the second light reflecting structure is located on an optical path of reflected light of the first light reflecting structure, and the second light reflecting structure is used for reflecting light from the first light reflecting structure. A photodetector is provided on an optical path of a light-emitting device, for example, the light-emitting device and the photodetector can be arranged along the length dimension of a housing. A light-emitting device having a larger light-emitting area can be selected, and a photodetector having a larger light-sensitive area can be selected, thereby increasing an emission power of the light-emitting device and the sensitivity of the photodetector.

Description

Stylus, electronic device

[0001] The present application claims priority to the Chinese Patent Application No. 202411127778.9, filed on August 15, 2024, and entitled "Stylus, Electronic Device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of electronic device accessories, in particular to a stylus and an electronic device comprising the same. BACKGROUND

[0003] With the development of electronic technology, more and more electronic terminals are equipped with some auxiliary devices. For example, a stylus, as a common input device, can realize the function of inputting graphics and text to an electronic terminal.

[0004] In some existing styluses, the arrangement of the light source and the photodetector occupies a large space, which limits the size of the light source and the photodetector. As a result, the emission power of the light source is low, and the detection sensitivity of the photodetector is low. For example, when the stylus takes color, it will result in low color taking signal-to-noise ratio and poor color taking accuracy. SUMMARY

[0005] The present application provides a stylus and an electronic device comprising the same. The purpose is to provide a stylus with high light source emission power and high photodetector sensitivity.

[0006] To achieve the above purpose, the embodiments of the present application adopt the following technical solutions:

[0007] In a first aspect, the present application provides a stylus, such as a stylus that can take color, or a stylus that can take text, or a stylus that can take patterns.

[0008] The stylus comprises a pen shell, a light emitting device, a photodetector, a first light reflecting structure and a second light reflecting structure arranged in the pen shell; the photodetector is arranged on the light path of the light emitting device; the first light reflecting structure is located on the light path of the light emitting device, and the first light reflecting structure is used for reflecting light from the light emitting device; the second light reflecting structure is located on the light path of the reflected light of the first light reflecting structure, and the second light reflecting structure is used for reflecting light from the first light reflecting structure, such as the reflected light of the second light reflecting structure can be projected onto a target object.

[0009] Since the photoelectric detector is arranged on the light path of the light emitting device, the light emitted by the light emitting device is blocked by the photoelectric detector. However, the present application can ensure the amount of light signals emitted to the target object by arranging the first light reflection structure and the second light reflection structure. For example, the first light reflection structure reflects the light from the light emitting device to the second light reflection structure, and the second light reflection structure reflects the light from the first light reflection structure to the target object. That is, the light blocked by the photoelectric detector can be projected to the target object through the matched first light reflection structure and the second light reflection structure, so as to ensure the amount of light signals emitted to the target object and ensure the light source coupling efficiency.

[0010] In the touch pen provided by the present application, the light emitting device is used to emit light signals to the target object outside the pen shell, and the photoelectric detector is used to sense the light reflected from the target object. The photoelectric detector of the present application is arranged on the light path of the light emitting device, which can be regarded as that the photoelectric detector and the light emitting device are arranged along the longitudinal direction. In some related technologies, the photoelectric detector and the light emitting device are arranged side by side, which can be regarded as that the photoelectric detector and the light emitting device are arranged along the transverse direction. In some scenarios, in the case of limited transverse dimension, the longitudinal arrangement scheme of the present application can be used to select the light emitting device with larger light emitting area and the photoelectric detector with larger light sensitive area, so as to improve the emission power of the light emitting device and the sensitivity of the photoelectric detector.

[0011] In an implementable manner, the light emitting device and the photoelectric detector are arranged along the length direction of the pen shell; the first light reflection structure is arranged on the side of the photoelectric detector facing the light emitting device; and the second light reflection structure is arranged between the light emitting device and the first light reflection structure.

[0012] In this example, since the light emitting device and the photoelectric detector are arranged along the length direction of the pen shell, compared with the case that the light emitting device and the photoelectric detector are arranged along the radial dimension of the pen shell, not only the emission power of the light emitting device and the sensitivity of the photoelectric detector can be improved, but also the radial dimension of the pen shell can be effectively reduced, which is beneficial to the miniaturization design of the touch pen.

[0013] In this implementation structure, the first light reflection structure is arranged on the side of the photoelectric detector facing the light emitting device, so that the light projected on the photoelectric detector can be reflected by the first light reflection structure and reflected to the second light reflection structure, which can improve the amount of light signals emitted to the target object.

[0014] In addition, in this example, the second light reflection structure is arranged between the light emitting device and the first light reflection structure, so that more light reflected by the first light reflection structure can be projected to the second light reflection structure, which can improve the light coupling efficiency between the first light reflection structure and the second light reflection structure.

[0015] In an implementation, the second light reflection structure has a light passing hole formed thereon, and the light emitting device is capable of projecting light through the light passing hole to the first light reflection structure; a part of the second light reflection structure located at the periphery of the light passing hole forms a reflection part, and the reflection part is configured to reflect the reflected light from the first light reflection structure.

[0016] In an implementation, the second light reflection structure includes a plurality of mirrors, and the plurality of mirrors are arranged along a circumferential direction and enclose the light passing hole.

[0017] In an implementation, the second light reflection structure includes a plurality of mirrors, and the plurality of mirrors are arranged along a circumferential direction and enclose the light passing hole.

[0018] In an implementation, the second light reflection structure includes a plurality of mirrors, and the plurality of mirrors are arranged along a circumferential direction and enclose the light passing hole.

[0019] In an implementation, the second light reflection structure includes a plurality of mirrors, and the plurality of mirrors are arranged along a circumferential direction and enclose the light passing hole.

[0020] In an implementation, the second light reflection structure includes a plurality of mirrors, and the plurality of mirrors are arranged along a circumferential direction and enclose the light passing hole.

[0021] In an implementation, the second light reflection structure includes a plurality of mirrors, and the plurality of mirrors are arranged along a circumferential direction and enclose the light passing hole.

[0022] In an implementation, the second light reflection structure includes a plurality of mirrors, and the plurality of mirrors are arranged along a circumferential direction and enclose the light passing hole.

[0023] In an implementation, the second light reflection structure includes a plurality of mirrors, and the plurality of mirrors are arranged along a circumferential direction and enclose the light passing hole.

[0024] In an implementation, the second light reflection structure includes a plurality of mirrors, and the plurality of mirrors are arranged along a circumferential direction and enclose the light passing hole.

[0025] In an implementation, the second light reflection structure includes a plurality of mirrors, and the plurality of mirrors are arranged along a circumferential direction and enclose the light passing hole.

[0026] In an implementation, the second light reflection structure includes a plurality of mirrors, and the plurality of mirrors are arranged along a circumferential direction and enclose the light passing hole.

[0027] In an implementation, the second light reflection structure includes a plurality of mirrors, and the plurality of mirrors are arranged along a circumferential direction and enclose the light passing hole.

[0028] The first reflecting surface of the convex surface can reflect more light onto the second light reflecting structure.

[0029] In an implementable manner, the second light reflecting structure comprises a second reflecting surface, the second reflecting surface being configured to reflect light from the first light reflecting structure; and the second reflecting surface is a concave surface.

[0030] For example, the second reflecting surface can be a parabolic surface, a hyperbolic surface, an elliptical surface or a spherical surface.

[0031] The second reflecting surface of the concave surface can reflect more light onto the target object.

[0032] In an implementable manner, the first light reflecting structure or the second light reflecting structure comprises a substrate and a reflecting film, the reflecting film being stacked on the substrate.

[0033] The light reflecting structure of this structure is simple in structure and simple in manufacturing process, and is easy to implement.

[0034] In an implementable manner, the reflecting film comprises a metal film, the metal film being stacked on the substrate.

[0035] The metal film can be used in a wide wavelength range to meet the use requirements of the stylus.

[0036] In an implementable manner, the reflecting film comprises a metal film and a dielectric film, the metal film being stacked on the substrate, and the dielectric film being stacked on a side of the metal film away from the substrate.

[0037] The metal film is softer than the dielectric film, and the dielectric film can be used as a protective structure of the metal film to improve the use stability of the stylus.

[0038] In an implementable manner, the reflecting film comprises a plurality of dielectric films stacked on the substrate, and the refractive indexes of adjacent two dielectric films are different.

[0039] The reflecting film comprises a plurality of dielectric films stacked in layers, and the use of the plurality of dielectric films with different refractive indexes can improve the reflectivity of the light reflecting structure and reduce absorption loss.

[0040] In an implementable manner, the stylus further comprises a diffusion member, the diffusion member being arranged on a light path of the reflected light of the second light reflecting structure.

[0041] The diffusion member can play a role of light homogenization, so that more light is projected onto the target object.

[0042] In an implementable manner, the second light reflection structure has a first wavelength reflection surface and a second wavelength reflection surface, the first wavelength reflection surface is located on the light path of the light emitting device, the first wavelength reflection surface is configured to reflect light with a first wavelength emitted by the light emitting device and transmit light with a second wavelength, the first light reflection structure receives the light with the second wavelength and reflects the light with the second wavelength to the second wavelength reflection surface, and the first wavelength is different from the second wavelength.

[0043] In an implementable manner, the light emitted by the light emitting device is polychromatic light.

[0044] In an implementable manner, the pen shell includes a light-transmitting region, and the light-transmitting region is an arc structure protruding towards the outside of the pen shell.

[0045] In this way, the pen shell can be used as a pen cap, and the structure of the stylus is simplified.

[0046] In an implementable manner, the reflection surface of the second light reflection structure is a concave surface, the concave surface is configured to reflect light from the first light reflection structure to the arc structure, and the light emitted from the arc structure is parallel light.

[0047] The concave reflection surface of the second light reflection structure cooperates with the arc structure of the light-transmitting region of the pen shell, so that the light emitted from the light-transmitting region is parallel light, and more light is projected onto the target object.

[0048] In a second aspect, the present application provides a stylus tail, which is used for being mounted on a pen body, and includes a shell having a connecting portion configured to be detachably connected with the pen body; the stylus tail further includes a light emitting device, a photoelectric detector, a first light reflection structure and a second light reflection structure located in the shell.

[0049] The photoelectric detector is arranged on the light path of the light emitting device, and the light emitting device and the photoelectric detector are arranged along the length direction of the stylus tail; the first light reflection structure is located on the light path of the light emitting device, and is configured to reflect light from the light emitting device; and the second light reflection structure is located on the light path of the reflected light of the first light reflection structure, and is configured to reflect light from the first light reflection structure.

[0050] The stylus tail provided by the present application can be detachably mounted on a stylus. In the stylus tail, the photoelectric detector is arranged on the light path of the light emitting device, for example, the light emitting device and the photoelectric detector can be arranged along the length dimension of the stylus tail. Compared with the arrangement of the light emitting device and the photoelectric detector along the radial dimension of the stylus tail, the present application can select a light emitting device with a larger light emitting area and a photoelectric detector with a larger light sensitive area, thereby improving the emission power of the light emitting device and the sensitivity of the photoelectric detector; and the radial dimension of the stylus tail can be effectively reduced, which is conducive to the miniaturization design of the stylus.

[0051] In an implementation, the first light reflection structure is disposed on a side of the photodetector facing the light emitting device; and the second light reflection structure is disposed between the light emitting device and the first light reflection structure.

[0052] In the implementation, the first light reflection structure is disposed on a side of the photodetector facing the light emitting device, so that light projected onto the photodetector can be reflected by the first light reflection structure and reflected onto the second light reflection structure, thereby increasing the amount of light signal emitted to the target object.

[0053] In addition, in the example, the second light reflection structure is disposed between the light emitting device and the first light reflection structure, so that more light reflected by the first light reflection structure is projected onto the second light reflection structure, thereby increasing the light coupling efficiency between the first light reflection structure and the second light reflection structure.

[0054] In an implementation, the second light reflection structure has a light passing hole formed therein, and the light emitting device is capable of projecting light through the light passing hole to the first light reflection structure; and a portion of the second light reflection structure located at a periphery of the light passing hole forms a reflection portion, and the reflection portion is configured to reflect the reflected light from the first light reflection structure.

[0055] In an implementation, the second light reflection structure includes a plurality of mirrors, and the light passing hole is disposed on one of the mirrors.

[0056] In an implementation, the first light reflection structure is symmetrical about an optical axis of the light emitting device; or the reflection portion is symmetrical about the optical axis of the light emitting device.

[0057] Since the first light reflection structure is symmetrical about the optical axis of the light emitting device, or the reflection portion is symmetrical about the optical axis of the light emitting device, the amount of light signal emitted to the target object can be increased, and the light coupling efficiency can be improved.

[0058] In an implementation, an optical axis of the first light reflection structure passes through a center of a light emitting surface of the light emitting device, and a light emitting region of the light emitting device is located within the light passing hole.

[0059] In an implementation, a focal point of the first light reflection structure coincides with a focal point of the second light reflection structure.

[0060] The light emitting device is disposed at an optical axis of the first light reflection structure, the light emitting region of the light emitting device is located within the light passing hole, or the first light reflection structure and the second light reflection structure are co-located, so that the amount of light signal emitted to the target object can be increased, and the light source coupling efficiency can be improved.

[0061] In a third aspect, the present application provides a stylus, which can take color, or can take text, or can also take a pattern.

[0062] The stylus comprises a pen shell, a light emitting device, a photodetector, a third light reflection structure and a fourth light reflection structure arranged in the pen shell; the light emitting device is arranged on the light receiving surface side of the photodetector; the third light reflection structure is located on the light path of the light reflected by the target object, and is used for reflecting the light from the target object; the fourth light reflection structure is located on the light path of the reflected light of the third light reflection structure, and is used for reflecting the light from the third light reflection structure to the photodetector; the light emitting device is arranged on the side of the fourth light reflection structure away from the photodetector, and the light emitting device and the fourth light reflection structure are oppositely arranged.

[0063] In the present application, since the light emitting device is arranged on the light receiving surface side of the photodetector, the light emitting device will block part of the light of the target object from being incident on the photodetector, but by arranging the third light reflection structure and the fourth light reflection structure, the amount of light signal incident on the photodetector can be ensured, for example, the third light reflection structure reflects the light from the target object to the fourth light reflection structure, and the fourth light reflection structure reflects the light from the third light reflection structure to the photodetector, that is, the light blocked by the light emitting device can be projected to the photodetector through the matched third light reflection structure and the fourth light reflection structure, so that the amount of light signal incident on the photodetector can be ensured.

[0064] In the stylus provided by the present application, the light emitting device is used for emitting light signals to the target object outside the pen shell, and the photodetector is used for sensing the light reflected from the target object; the light emitting device of the present application is arranged on the light receiving surface side of the photodetector, which can be understood as that the light emitting device is arranged on the light path of the photodetector, and can be regarded as that the photodetector and the light emitting device are arranged along the longitudinal direction; in some related technologies, the photodetector and the light emitting device are arranged side by side, which can be regarded as that the photodetector and the light emitting device are arranged along the transverse direction; in some scenarios, in the case of limited transverse dimension, the longitudinal arrangement scheme of the present application can be used to select a light emitting device with a larger light emitting area and a photodetector with a larger light receiving area, so as to improve the emission power of the light emitting device and the sensitivity of the photodetector.

[0065] In an implementable manner, the light emitting device and the photodetector are arranged along the length direction of the pen shell; the third light reflection structure is arranged on the light receiving surface side of the photodetector; and the fourth light reflection structure is arranged between the light emitting device and the third light reflection structure.

[0066] In this way, the light reflected by the target object can be projected onto the third light reflection structure and then reflected onto the fourth light reflection structure, so as to improve the amount of light signal projected to the photodetector.

[0067] In the example, since the light emitting device and the photodetector are arranged along the length direction of the pen shell, compared with the light emitting device and the photodetector arranged along the radial dimension of the pen shell, not only the emission power of the light emitting device and the sensitivity of the photodetector can be improved, but also the radial dimension of the pen shell can be effectively reduced, which is beneficial to the miniaturization design of the stylus.

[0068] In an implementable manner, the third light reflection structure is provided with a light passing hole, and the reflected light from the fourth light reflection structure can pass through the light passing hole and project onto the photodetector; a part of the third light reflection structure located at the outer periphery of the light passing hole forms a reflection part, and the reflection part is used for reflecting the light from the target object.

[0069] In an implementable manner, the third light reflection structure includes a mirror, and the light passing hole is arranged on the mirror.

[0070] Through the implementation manner of opening the light passing hole on the mirror, not only the structure is simple, but also the assembly is facilitated.

[0071] In an implementable manner, the third light reflection structure includes a third reflection surface, and the third reflection surface is used for reflecting the light from the target object; the third reflection surface is a concave surface.

[0072] For example, the third reflection surface can be a parabolic surface, a hyperboloid surface, an elliptical surface or a spherical surface.

[0073] The concave third reflection surface can reflect more light onto the fourth light reflection structure.

[0074] In an implementable manner, the fourth light reflection structure includes a fourth reflection surface, and the fourth reflection surface is used for reflecting the light from the third light reflection structure; the fourth reflection surface is a convex surface.

[0075] For example, the fourth reflection surface can be a hyperboloid surface or a spherical surface.

[0076] The convex fourth reflection surface can reflect more light onto the photodetector.

[0077] In an implementable manner, the focal point of the third light reflection structure coincides with the focal point of the fourth light reflection structure.

[0078] In an implementable manner, the optical axis of the fourth light reflection structure passes through the center of the light-sensitive surface of the photodetector, and the reflected light region of the fourth light reflection structure is located in the light passing hole.

[0079] The photodetector is arranged at the optical axis of the fourth light reflection structure, the reflected light region of the fourth light reflection structure is located in the light passing hole, or the third light reflection structure and the fourth light reflection structure are arranged in a confocal manner, which can improve the amount of light signal projected onto the photodetector and improve the sensitivity of the photodetector.

[0080] In an implementable manner, the third light reflection structure is symmetrical about an optical axis of the photodetector; or, the reflection portion is symmetrical about the optical axis of the photodetector.

[0081] In this way, the amount of light signal received by the photodetector can be increased, and the light coupling efficiency can be improved.

[0082] In an implementable manner, the third light reflection structure or the fourth light reflection structure comprises: a substrate and a reflection film, the reflection film being stacked on the substrate.

[0083] In an implementable manner,

[0084] The light reflection structure of this structure is simple in structure and can be used in a wide wavelength range, meeting the use requirements of the stylus.

[0085] In an implementable manner, the reflection film comprises a metal film, the metal film being stacked on the substrate.

[0086] In an example, the reflection film can comprise a stacked metal film and a dielectric film, the metal film being stacked on the substrate, and the dielectric film being stacked on a side of the metal film away from the substrate.

[0087] The metal film is softer than the dielectric film, and the dielectric film can be used as a protective structure of the metal film.

[0088] In an example, the reflection film comprises a plurality of stacked dielectric films, and the use of a plurality of dielectric films with different refractive indexes can improve the reflectivity of the light reflection structure and reduce absorption loss.

[0089] In an implementable manner, the stylus further comprises a diffusion member, the diffusion member being arranged on the light path of the light emitting device.

[0090] The diffusion member can play a role of light homogenization, so that more light is projected onto the target object.

[0091] In an implementable manner, the pen shell comprises a light-transmitting region, the light-transmitting region being an arc-shaped structure protruding towards the outside of the pen shell.

[0092] In this way, the pen shell can be used as a pen cap, and the structure of the stylus can be simplified.

[0093] In an implementable manner, the reflection surface of the third light reflection structure is a concave surface, and the concave surface is used to reflect light from the arc-shaped structure to the fourth light reflection structure.

[0094] In a fourth aspect, the present application provides a stylus tail, which is used to be mounted on a pen body, and the stylus tail comprises a shell, the shell having a connecting part for detachable connection with the pen body; the stylus tail further comprises a light emitting device, a photoelectric detector, a third light reflection structure and a fourth light reflection structure located in the shell.

[0095] The light emitting device is arranged on the light path of the photoelectric detector, and the light emitting device and the photoelectric detector are arranged along the length direction of the stylus tail; the third light reflection structure is located on the light path of the light reflected by the target object, and the third light reflection structure is used for reflecting the light from the target object; the fourth light reflection structure is located on the light path of the reflected light of the third light reflection structure, and the fourth light reflection structure is used for reflecting the light from the third light reflection structure to the photoelectric detector.

[0096] The stylus tail provided by the present application can be detachably mounted on the stylus. In the stylus tail, the light emitting device is arranged on the light path of the photoelectric detector, for example, the light emitting device and the photoelectric detector can be arranged along the length dimension of the stylus tail. Compared with the arrangement of the light emitting device and the photoelectric detector along the radial dimension of the stylus tail, the present application can select a light emitting device with a larger light emitting area and a photoelectric detector with a larger light sensitive area, thereby improving the emission power of the light emitting device and the sensitivity of the photoelectric detector; and the radial dimension of the stylus tail can be effectively reduced, which is beneficial to the miniaturization design of the stylus.

[0097] In an implementable manner, the third light reflection structure of the stylus tail is arranged on the light sensitive surface side of the photoelectric detector; and the fourth light reflection structure is arranged between the light emitting device and the third light reflection structure.

[0098] In this way, the light reflected by the target object can be projected onto the third light reflection structure and reflected onto the fourth light reflection structure, so that the amount of light signal projected to the photoelectric detector can be improved.

[0099] In an implementable manner, the third light reflection structure has a light passing hole formed thereon, and the reflected light from the fourth light reflection structure can pass through the light passing hole and be projected onto the photoelectric detector; and a part of the third light reflection structure located at the outer periphery of the light passing hole forms a reflection part for reflecting the light from the target object.

[0100] In an implementable manner, the third light reflection structure comprises a mirror, and the light passing hole is arranged on the mirror.

[0101] In a fifth aspect, the present application provides an electronic device, which comprises a terminal body and the stylus tail in the above-mentioned implementation manner, and the terminal body comprises a display screen.

[0102] The electronic device provided in the application includes the stylus in the implementation manners described above. The stylus is an auxiliary device of the electronic device. For example, the stylus can be used to input text and graphics to the electronic terminal. The light emitting device and the photodetector of the stylus are arranged vertically, i.e., along the length direction of the stylus. In this way, a light emitting device with a large light emitting area and a photodetector with a large light sensing area can be selected. The emission power of the light emitting device and the detection sensitivity of the photodetector can be improved, and the text and graphics input performance can be improved.

[0103] In a sixth aspect, the application provides a detection device. The detection device can be arranged in a stylus to be used by a user to pick up color. Alternatively, the detection device can be arranged in a wearable device to detect a physiological parameter, such as a heart rate.

[0104] The detection device includes a light emitting device, a photodetector, a first light reflecting structure, and a second light reflecting structure. The photodetector is arranged on the light path of the light emitting device. The first light reflecting structure is arranged on the light path of the light emitting device. The first light reflecting structure is used to reflect light from the light emitting device. The second light reflecting structure is arranged on the light path of the reflected light of the first light reflecting structure. The second light reflecting structure is used to reflect light from the first light reflecting structure. Alternatively, the light emitting device is arranged on the side of the light sensing surface of the photodetector. The light emitting device is arranged on the light path of the photodetector. The first light reflecting structure is arranged on the light path of the reflected light of the target object. The first light reflecting structure is used to reflect light from the target object. The second light reflecting structure is arranged on the light path of the reflected light of the first light reflecting structure. The second light reflecting structure is used to reflect light from the first light reflecting structure to the photodetector.

[0105] In the detection device provided in the application, the photodetector is arranged on the light path of the light emitting device, or the light emitting device is arranged on the side of the light sensing surface of the photodetector. It can be understood that the photodetector is arranged in a stacked manner along the light path direction. In this way, a light emitting device with a large light emitting area and a photodetector with a large light sensing area can be selected. The emission power of the light emitting device and the detection sensitivity of the photodetector can be improved, and the detection performance of the detection device can be improved.

[0106] In an implementation manner, the photodetector is arranged on the light path of the light emitting device. The first light reflecting structure is arranged on the side of the photodetector facing the light emitting device. The second light reflecting structure is arranged between the light emitting device and the first light reflecting structure. The second light reflecting structure has a light passing hole. Light from the light emitting device can pass through the light passing hole and be projected to the first light reflecting structure. The part of the second light reflecting structure located at the outer periphery of the light passing hole forms a reflecting part. The reflecting part is used to reflect the reflected light from the first light reflecting structure.

[0107] In an implementable manner, the second light reflection structure comprises a mirror, and the light passing hole is arranged on the mirror.

[0108] In an implementable manner, the light emitting device is arranged on one side of the light sensitive surface of the photodetector, the first light reflection structure is arranged on one side of the light sensitive surface of the photodetector, the second light reflection structure is arranged between the light emitting device and the first light reflection structure, the light passing hole is formed on the first light reflection structure, the reflected light from the second light reflection structure can pass through the light passing hole and project onto the photodetector, and the part of the first light reflection structure located at the outer periphery of the light passing hole forms a reflection part for reflecting the light from the target object. BRIEF DESCRIPTION OF DRAWINGS

[0109] FIG. 1 is a structural schematic diagram of a stylus according to an embodiment of the present application;

[0110] FIG. 2 is a structural schematic diagram of a tail of a stylus according to an embodiment of the present application;

[0111] FIG. 3 is a structural schematic diagram of a second light reflection structure according to an embodiment of the present application;

[0112] FIG. 4 is a structural schematic diagram of a second light reflection structure according to an embodiment of the present application;

[0113] FIG. 5 is a structural schematic diagram of a first light reflection structure or a second light reflection structure according to an embodiment of the present application;

[0114] FIG. 6 is a structural schematic diagram of a first light reflection structure or a second light reflection structure according to an embodiment of the present application;

[0115] FIG. 7 is a structural schematic diagram of a first light reflection structure or a second light reflection structure according to an embodiment of the present application;

[0116] FIG. 8 is a schematic diagram of the positional relationship among a first light reflection structure, a second light reflection structure and a light emitting device according to an embodiment of the present application;

[0117] FIG. 9 is a schematic diagram of the positional relationship between a first light reflection structure and a second light reflection structure according to an embodiment of the present application;

[0118] FIG. 10 is a schematic diagram of the positional relationship among a first light reflection structure, a second light reflection structure and a light emitting device according to an embodiment of the present application;

[0119] FIG. 11 is a structural schematic diagram of a tail of a stylus according to an embodiment of the present application;

[0120] FIG. 12 is a structural schematic diagram of a tail of a stylus according to an embodiment of the present application;

[0121] FIG. 13 is a structural schematic diagram of a second light reflection structure according to an embodiment of the present application;

[0122] FIG. 14 is a cross-sectional view of FIG. 13 along A-A;

[0123] FIG. 15 is a structural schematic diagram of a pen tail of a stylus according to an embodiment of the present application;

[0124] FIG. 16 is an exploded view of FIG. 15;

[0125] FIG. 17 is a cross-sectional view of FIG. 15;

[0126] FIG. 18 is a structural schematic diagram of a support according to an embodiment of the present application;

[0127] FIG. 19 is a structural schematic diagram of a pen tail of a stylus according to an embodiment of the present application;

[0128] FIG. 20 is a schematic diagram of the positional relationship of a third light reflection structure, a fourth light reflection structure and a photodetector according to an embodiment of the present application;

[0129] FIG. 21 is a structural schematic diagram of a pen tail of a stylus according to an embodiment of the present application;

[0130] FIG. 22 is a structural schematic diagram of a pen tail of a stylus according to an embodiment of the present application.

[0131] Reference signs: 100 - stylus; 101 - pen body; 102 - pen head; 103 - pen tail; 103A - light transmission region; 1031 - shell; 1 - light emitting device; 2 - photodetector; 31 - first light reflection structure; 32 - third light reflection structure; 31A - base; 32A - reflection film; 321 - metal film; 322 - dielectric film; 3221 - first dielectric film; 3222 - second dielectric film; 3223 - third dielectric film; 41 - second light reflection structure; 42 - fourth light reflection structure; 401 - light transmission hole; 402 - reflection part; 4A - first reflection mirror; 4B - second reflection mirror; 4C - third reflection mirror; 4D - fourth reflection mirror; 5 - diffusion plate; 6 - support; 61 - first support platform; 62 - second support platform. DETAILED DESCRIPTION

[0132] Embodiments of the present application provide a stylus that can be used with an electronic device having a touch display. The electronic device can be a desktop computer, a laptop, a tablet, an ultra-mobile personal computer (UMPC), a handheld computer, a talkman, a netbook, a POS machine, a personal digital assistant (PDA), a mobile terminal, a stationary terminal, or a foldable device.

[0133] As shown in FIG. 1, which is a structural diagram of a stylus 100 according to an example of the present application. The electronic device can have a touch display, and the stylus 100 can provide input to the electronic device, and the electronic device can perform an operation in response to the input based on the input of the stylus 100. For example, the stylus 100 can pick up some color, text, or texture, and apply it to a graphical pattern drawn by the electronic device.

[0134] As shown in FIG. 1, the stylus 100 can include a body 101, a tip 102, and a tail 103. In some examples, the tip 102 can be integrally formed with the body 101. In other examples, the tip 102 can be detachably connected to the body 101, for example, by a threaded connection, or by a clamping structure, such as a clasp and a slot.

[0135] The body 101 can have a receiving space, and some structural members or electronic devices can be disposed in the receiving space. For example, a battery can be disposed in the receiving space to provide power to the stylus.

[0136] The stylus 100 for inputting to the electronic device can include a light emitting device and a photoelectric detector. The light emitting device can emit a light signal, and the photoelectric detector can sense the light signal reflected from the target object.

[0137] The light emitting device can be a light emitting diode, such as an LED.

[0138] In some examples, when the photoelectric detector is used to sense the color of the light signal reflected on the target object, the photoelectric detector can include XYZ sensor, RGB sensor. In some other examples, when the photoelectric detector is used to sense the pattern of the light signal reflected on the target object, the photoelectric detector can include Complementary Metal Oxide Semiconductor (CMOS) detector, Charge-Coupled Device (CCD).

[0139] In order to improve the touch sensitivity, the light emitting device and the photoelectric detector of the above examples are arranged in the tail 103 in FIG. 1. The accommodating space in the tail 103 is small, so that the light emitting device and the photoelectric detector can be selected to have a small size, and then the light emitting area of the light emitting device and the photosensitive area of the photoelectric detector are small, which can result in low emission power of the light emitting device and low detection sensitivity of the photoelectric detector.

[0140] In order to improve the low emission power of the light emitting device and the low detection sensitivity of the photoelectric detector, some structures that can be implemented are given in the embodiments of the present application.

[0141] As shown in FIG. 2, which is a simple structure diagram of a tail according to an embodiment of the present application, the position relationship between the light emitting device and the photoelectric detector is shown. The light emitting device 1 and the photoelectric detector 2 can be arranged along the length direction of the stylus. As shown in FIG. 1 and FIG. 2, the light emitting device 1 and the photoelectric detector 2 can be arranged along the X direction.

[0142] The light emitting device 1 and the photoelectric detector 2 can be arranged along the length direction of the stylus. Compared with the light emitting device 1 and the photoelectric detector 2 arranged along the radial direction of the stylus (such as the Y direction in FIG. 1 and FIG. 2), the light emitting device 1 with a larger light emitting area can be selected, and the photoelectric detector 2 with a larger photosensitive area can be selected, so that the emission power of the light emitting device can be improved, and the detection sensitivity of the photoelectric detector can be improved. For example, when the stylus is used to take color, the color taking signal-to-noise ratio can be improved, and the color taking accuracy can be improved.

[0143] As shown in FIG. 2, the photoelectric detector 2 is located on the light path of the light emitting device 1, which can be understood as that the light emitting device 1 is arranged closer to the pen body 101 shown in FIG. 1 than the photoelectric detector 2.

[0144] As shown in FIG. 2, the light emitted by the light emitting device 1 is partially blocked by the photodetector 2. In order to emit the light blocked by the photodetector 2 from the stylus, the stylus can further include a first light reflecting structure 31 and a second light reflecting structure 41. The first light reflecting structure 31 is located on the light path of the light emitting device 1, and is configured to reflect the light from the light emitting device 1. The second light reflecting structure 41 is located on the light path of the light reflected by the first light reflecting structure 31, and is configured to reflect the light from the first light reflecting structure 31.

[0145] In FIG. 2, the thinner and arrowed dashed line schematically shows the propagation path of the light emitted by the light emitting device 1. Part of the light emitted by the light emitting device 1 can be projected onto the first light reflecting structure 31, the first light reflecting structure 31 reflects the light from the light emitting device 1, and the reflected light is projected onto the second light reflecting structure 41, the second light reflecting structure 41 reflects the light from the first light reflecting structure 31, and the reflected light can be projected outside the stylus and onto the target object.

[0146] With the matched first light reflecting structure 31 and second light reflecting structure 41, the light path of the light emitted by the light emitting device 1 can be changed, and the light blocked by the photodetector 2 can be projected outside the stylus, so that the light emitting efficiency of the light emitting device 1 is not reduced.

[0147] As shown in FIG. 2, the thicker and arrowed dashed line schematically shows the light path of the light reflected by the target object and projected onto the photodetector 2. Since the photodetector 2 is arranged close to the outside of the stylus, the photodetector 2 can sufficiently receive the light signal reflected by the target object, and the detection sensitivity of the photodetector 2 is improved.

[0148] As shown in FIG. 2, the first light reflecting structure 31 is arranged on the side of the photodetector 2 facing the light emitting device 1. Alternatively, the photodetector 2 has a light receiving surface and a back surface opposite to the light receiving surface. In the example shown in FIG. 2, the light receiving surface of the photodetector 2 faces the outside of the stylus, and the first light reflecting structure 31 is arranged on the side of the back surface of the photodetector 2. The light emitting device 1 has a light emitting surface and a back surface opposite to the light emitting surface, and the first light reflecting structure 31 is arranged between the light emitting surface of the light emitting device 1 and the back surface of the photodetector 2.

[0149] In some examples, the second light reflecting structure 41 is arranged between the light emitting device 1 and the first light reflecting structure 31.

[0150] In the example of FIG. 2, in order to make more light emitted by the light emitting device 1 received by the first light reflecting structure 31, and to improve the light coupling efficiency of the light emitting device 1, as shown in FIG. 3, the second light reflecting structure 41 is provided with a light passing hole 401, and light emitted by the light emitting device 1 can pass through the light passing hole 401 to project onto the first light reflecting structure 31, so that more light emitted by the light emitting device 1 projects onto the first light reflecting structure 31.

[0151] As shown in FIG. 3, the part of the second light reflecting structure 41 located at the outer periphery of the light passing hole 401 forms a reflecting part 402, and the reflecting part 402 is used to reflect the reflected light from the first light reflecting structure 31.

[0152] In order to make more light emitted by the light emitting device 1 received by the first light reflecting structure 31, the projection of the light passing hole 401 on the light emitting surface of the light emitting device 1 is located outside the light emitting surface of the light emitting device 1. It can be understood that the area of the light passing hole 401 is greater than the area of the light emitting surface of the light emitting device 1.

[0153] In order to make more light emitted by the light emitting device 1 received by the first light reflecting structure 31, and to improve the light coupling efficiency, the projection of the first light reflecting structure 31 on the light emitting surface of the light emitting device 1 is located outside the light emitting surface of the light emitting device 1. It can be understood that the area of the reflecting surface of the first light reflecting structure 31 is greater than the area of the light emitting surface of the light emitting device 1.

[0154] In some optional structures, the light passing hole 401 can be a circular hole as shown in FIG. 3. In other optional structures, the light passing hole 401 can be an elliptical hole or a square hole as shown in FIG. 3.

[0155] As shown in the example of FIG. 3, it is shown that the first light reflecting structure 31 is a circular structure. In other examples, the first light reflecting structure 31 can be an elliptical or rectangular structure, or other shapes.

[0156] In some optional processes, a mirror can be used, and the light passing hole 401 is formed on the mirror to manufacture the second light reflecting structure 41 as shown in FIG. 3.

[0157] In other examples, as shown in FIG. 4, the second light reflecting structure 41 includes a plurality of mirrors, and the plurality of mirrors are connected in sequence along the circumference to form a reflecting structure with the light passing hole 401. For example, in FIG. 4, the second light reflecting structure 41 includes a first mirror 4A, a second mirror 4B, a third mirror 4C, and a fourth mirror 4D, and the first mirror 4A, the second mirror 4B, the third mirror 4C, and the fourth mirror 4D are connected in sequence to form the light passing hole 401. Among the first mirror 4A, the second mirror 4B, the third mirror 4C, and the fourth mirror 4D, adjacent two mirrors can be connected by adhesive.

[0158] The first light reflection structure 31 and the second light reflection structure 41 can be implemented in various ways. Some examples are given below.

[0159] For example, the first light reflection structure 31 can include a substrate 31A and a reflective film 32A disposed on the substrate 31A.

[0160] For example, the substrate 31A can be made of glass or metal. The surface of the glass or metal can be polished.

[0161] For example, the substrate 31A can be made of glass or metal. The surface of the glass or metal can be polished.

[0162] In the example of FIG. 6, the metal film 321 is soft. By covering the metal film 321 with a hard dielectric film 322, the metal film 321 can be protected, and the reliability of the light reflection structure can be improved.

[0163] In addition, the metal film 321 as a reflective film layer has a wide wavelength range, which improves the light coupling efficiency.

[0164] In some implementations, the metal film 321 can be stacked on the substrate 31A without the dielectric film 322. Alternatively, the dielectric film 322 can be stacked on the substrate 31A without the metal film 321.

[0165] To improve the light reflection efficiency, as shown in FIG. 7, a plurality of dielectric films can be stacked on the substrate 31A, and the refractive indices of adjacent two dielectric films are different. For example, the first light reflection structure 31 can include a first dielectric film 3221, a second dielectric film 3222, and a third dielectric film 3223 stacked on the substrate 31A in sequence, and the refractive indices of the first dielectric film 3221, the second dielectric film 3222, and the third dielectric film 3223 are different. Through the reflection of the plurality of dielectric films, the reflectivity of the light reflection structure can be improved, and the light absorption loss can be reduced.

[0166] As shown in FIG. 8, FIG. 8 illustrates the optical path relationship of the light emitting device 1, the first light reflection structure 31, and the second light reflection structure 41. In this example, the first light reflection structure 31 has a first reflection surface S1 for reflecting light from the light emitting device 1 to the second light reflection structure 41. The first reflection surface S1 is a convex surface. The convex surface is used to diffuse more light to the second light reflection structure 41.

[0167] The first reflection surface S1 is a convex surface. The convex surface can be a hyperboloid, or can be a spherical surface.

[0168] As shown in FIG. 8, the second light reflection structure 41 includes a second reflection surface S2, the second reflection surface S2 is configured to reflect the light from the first light reflection structure 31; the second reflection surface S2 is a concave surface, and the concave surface is configured to make the reflected light parallel to the second light reflection structure 41.

[0169] The second reflection surface S2 is a concave surface, and the concave surface can be a parabolic surface, a hyperbolic surface, an elliptic surface, or a spherical surface.

[0170] In order to improve the light coupling efficiency, as shown in FIG. 8, the light emitting device 1 is located at the optical axis Q1 of the first light reflection structure 31, and the light emitting region of the light emitting device 1 is located in the light hole 401, so that more light of the light emitting device 1 can be projected onto the first light reflection structure 31.

[0171] The light emitting device 1 is located at the optical axis Q1 of the first light reflection structure 31, which can be understood as that the optical axis Q1 of the first light reflection structure 31 passes through the center of the light emitting surface of the light emitting device 1, and the center of the light emitting surface of the light emitting device 1 is substantially located at the optical axis Q1 of the first light reflection structure 31.

[0172] In order to improve the light coupling efficiency, the positional relationship between the first light reflection structure 31 and the second light reflection structure 41 can be as follows:

[0173] In some examples, the optical axis Q1 of the first light reflection structure 31 and the optical axis Q2 of the second light reflection structure 41 can coincide, and the focal point of the first light reflection structure 31 and the focal point of the second light reflection structure 41 can not coincide, for example, the distance between the focal point F1 of the first light reflection structure 31 and the focal point F2 of the second light reflection structure 41 is less than or equal to 30% of the focal length of the first light reflection structure 31, for example, the distance between the focal point F1 of the first light reflection structure 31 and the focal point F2 of the second light reflection structure 41 is equal to 20% of the focal length of the first light reflection structure 31.

[0174] In some examples, as shown in FIG. 9, the optical axis Q1 of the first light reflection structure 31 and the optical axis Q2 of the second light reflection structure 41 can coincide, and the focal point F1 of the first light reflection structure 31 and the focal point F2 of the second light reflection structure 41 can coincide. In this way, the light coupling efficiency can be further optimized, for example, the light transmission efficiency of the light emitting device 1 can be greater than or equal to 50%.

[0175] In some styluses, as shown in FIG. 10, the first light reflection structure 31 can be symmetrically arranged about the optical axis Q3 of the light emitting device 1. In this way, the first light reflection structure 31 can receive more light from the light emitting device 1, and the light coupling efficiency of the light emitting device 1 can be improved.

[0176] In some styluses, the second light reflection structure 41 can be symmetrically arranged about the optical axis Q3 of the light emitting device 1, as shown in FIG. 10. For example, in FIG. 10, the second light reflection structure 41 includes a light passing hole 401 and a reflection portion 402 surrounding the periphery of the light passing hole 401, the center of the light passing hole 401 can be on the optical axis of the light emitting device 1, and the reflection portion 402 can be symmetrically arranged about the optical axis of the light emitting device 1.

[0177] In some styluses, the second light reflection structure 41 includes a plurality of mirrors as described above and shown in FIG. 4, the optical axes of the plurality of mirrors can coincide; or the optical axes of the plurality of mirrors can coincide, and the focal points of the plurality of mirrors can coincide.

[0178] In order to make the light emitted by the light emitting device 1 uniformly exit the stylus, as shown in FIG. 11, a diffuser plate 5 can also be included, which can scatter the light from the second light reflection structure 41 and make the light uniformly distributed and exit the stylus. In some structures, as shown in FIG. 11, the diffuser plate 5 is arranged on the side of the reflection surface of the second light reflection structure 41.

[0179] In some alternative materials, the diffuser plate 5 can be selected from glass, polyethylene terephthalate (PET), polycarbonate (PC), or poly methyl methacrylate (PMMA). For example, the diffuser plate 5 can be frosted glass, opal glass, or a PET plate doped with scattering particles.

[0180] The light emitted by the light emitting device 1 in the above examples can be composite light. In this way, the stylus can be used for color picking, pattern picking with color, etc.

[0181] FIG. 12 is a simple structure diagram of another pen tail given by an embodiment of the present application, which shows the positional relationship between the light emitting device 1 and the photodetector 2. The light emitting device 1 and the photodetector 2 can be arranged along the length direction of the stylus, as shown in FIG. 12, the light emitting device 1 and the photodetector 2 can be arranged along the X direction.

[0182] The light emitting device 1 and the photodetector 2 in the example of FIG. 12 are arranged along the length direction of the stylus, which can improve the emission power of the light emitting device, improve the detection sensitivity of the photodetector, and improve the use performance of the stylus.

[0183] In the example of FIG. 12, the photodetector 2 is located on the light path of the light emitting device 1, which can be understood as: the setting position of the light emitting device 1 is closer to the pen body 101 than the setting position of the photodetector 2.

[0184] In the example of FIG. 12, the tail 103 includes a light-transmitting region 103A, which is in an arc structure and protrudes towards the outside of the tail, and the light emitted from the light-transmitting region 103A is parallel light.

[0185] In some styluses, the cap can not be provided to be sleeved on the tail, and the structure shown in FIG. 12 can be directly used as the cap, so that the structure of the stylus can be simplified, and the arc structure can optimize the appearance aesthetics.

[0186] In order to make the light emitted from the light-transmitting region 103A be parallel light, the second light reflection structure 41 can adopt the structure shown in FIG. 13 and FIG. 14, which is a sectional view along A-A of FIG. 13, wherein the second light reflection structure 41 has a second reflection surface S2, which can be a concave surface as shown in FIG. 14.

[0187] By matching the concave second reflection surface S2 and the arc structure of the light-transmitting region 103A shown in FIG. 12, the light emitted from the light-transmitting region 103A can be parallel light.

[0188] As shown in FIG. 14, the curvature of the concave surface can be matched with the curvature of the arc structure of the light-transmitting region 103A to make the light emitted from the light-transmitting region 103A be parallel light.

[0189] FIG. 15, FIG. 16 and FIG. 17 are schematic structural diagrams of a tail according to an embodiment of the present application, FIG. 16 is an exploded view of FIG. 15, and FIG. 17 is a sectional view of FIG. 15. The tail 103 includes a shell 1031 having a light-transmitting region 103A, and the light-transmitting region 103A is separated from the shell 1031 in FIG. 16. In some structures, the light-transmitting region 103A and the shell 1031 are an integral structure.

[0190] The shell 1031 has an accommodation space, and some structures such as the light-emitting device 1, the photoelectric detector 2, the first light reflection structure 31 and the second light reflection structure 41 are arranged in the accommodation space.

[0191] As shown in FIG. 17, a support 6 can be arranged in the accommodation space, and as shown in FIG. 17 and FIG. 18, the support 6 has a first support table 61 on which the light-emitting device 1 can be arranged, and the support 6 also has a second support table 62 on which the second light reflection structure 41 is arranged.

[0192] The diffusion plate 5 serves as a support structure of the first light reflection structure 31 and the photoelectric detector 2, and the first light reflection structure 31 and the photoelectric detector 2 are oppositely arranged on two sides of the diffusion plate 5.

[0193] Figure 19 is a structure diagram of another pen tail given by the embodiment of the present application, which shows the positional relationship between the light emitting device and the photodetector. The light emitting device 1 and the photodetector 2 can be arranged along the length direction of the stylus. As shown in Figure 19, the light emitting device 1 and the photodetector 2 can be arranged along the X direction.

[0194] The light emitting device 1 and the photodetector 2 can be arranged along the length direction of the stylus. Compared with the light emitting device 1 and the photodetector 2 arranged along the radial direction (e.g. the Y direction in Figure 19) of the stylus, the light emitting device 1 with a larger light emitting area can be selected, and the photodetector 2 with a larger light receiving area can be selected. In this way, the emission power of the light emitting device can be improved, and the detection sensitivity of the photodetector can be improved. For example, when the stylus is used for color sampling, the color sampling signal-to-noise ratio can be improved, and the color sampling accuracy can be improved.

[0195] In the example of Figure 19, the photodetector 2 has a light receiving surface for receiving light reflected by the target object. The light emitting device 1 is located on the side of the light receiving surface of the photodetector 2. It can be understood that the photodetector 2 is arranged closer to the pen body 101 shown in Figure 1 than the light emitting device 1. In this way, more light emitted by the light emitting device 1 can irradiate the target object.

[0196] As shown in Figure 19, since the light emitting device 1 is located on the side of the light receiving surface of the photodetector 2, the light emitting device 1 is located on the light path of the photodetector 2. In order to make more light reflected by the target object be received by the photodetector 2, as shown in Figure 19, a third light reflecting structure 32 and a fourth light reflecting structure 42 can be further included. The third light reflecting structure 32 is located on the light path of the light reflected by the target object, and the third light reflecting structure 32 is used for reflecting the light from the target object. The fourth light reflecting structure 42 is located on the light path of the light reflected by the third light reflecting structure 32, and the fourth light reflecting structure 42 is used for reflecting the light from the third light reflecting structure 32 to the photodetector 2.

[0197] The light emitting device 1 is located on the light path of the photodetector 2. It can be understood that the light reflected by the target object has a light path to the photodetector 2, and the light emitting device 1 is located on the light path.

[0198] In Figure 19, the thicker dashed line with arrows schematically shows the propagation path of the light reflected by the target object to the photodetector. The light reflected by the target object can be projected onto the third light reflecting structure 32, the third light reflecting structure 32 reflects the light from the target object, and the reflected light is reflected onto the fourth light reflecting structure 42. The fourth light reflecting structure 42 reflects the light from the third light reflecting structure 32, and the reflected light can be reflected onto the photodetector 2 and received by the light receiving surface of the photodetector 2.

[0199] Since the light emitting device 1 is located on the light receiving surface side of the photodetector 2, in order to make more light reflected by the target object be received by the photodetector 2, as shown in FIG. 19, the orthographic projection of the photodetector 2 on the third light reflecting structure 32 is located within the edge of the third light reflecting structure 32, which can be understood as: the area of the third light reflecting structure 32 is greater than the area of the photodetector 2.

[0200] As shown in FIG. 19, the third light reflecting structure 32 is arranged on the light receiving surface side of the photodetector 2. The fourth light reflecting structure 42 is arranged between the light emitting device 1 and the third light reflecting structure 32.

[0201] In order to compress the space occupied by the fourth light reflecting structure 42, as shown in FIG. 19, the fourth light reflecting structure 42 is arranged on the side of the light emitting device 1 away from the light emitting surface, that is, the fourth light reflecting structure 42 is located on the back surface of the light emitting device 1.

[0202] As shown in FIG. 19, the third light reflecting structure 32 is provided with a light passing hole, and the light reflected by the fourth light reflecting structure 42 can pass through the light passing hole and be projected onto the photodetector 2.

[0203] As shown in FIG. 19, the part of the third light reflecting structure 32 located on the outer periphery of the light passing hole 321 forms a reflecting part, and the reflecting part is used for reflecting the light from the target object.

[0204] The third light reflecting structure 32 and the fourth light reflecting structure 42 in the example of FIG. 19 can adopt the structures shown in FIGS. 5 to 7 described above. For example, the third light reflecting structure 32 can include a substrate and a reflecting film arranged on the substrate, and the reflecting film can include at least one of a metal film or a dielectric film, or the reflecting film can include a plurality of stacked dielectric films, and the refractive indexes of adjacent two layers of dielectric films are different.

[0205] As shown in FIG. 20, FIG. 20 shows the optical path relationship of the photodetector 2, the third light reflecting structure 32 and the fourth light reflecting structure 42. In this example, the third light reflecting structure 32 has a third reflecting surface Q3, and the third reflecting surface Q3 is used for reflecting the light from the target object to the fourth light reflecting structure 42; the third reflecting surface Q3 is a concave surface, and the concave surface is used to reflect more light to the fourth light reflecting structure 42.

[0206] The third reflecting surface Q3 is a concave surface, which can be a parabolic surface, a hyperbolic surface, an elliptical surface or a spherical surface.

[0207] As shown in FIG. 20, the fourth light reflecting structure 42 includes a fourth reflecting surface Q4, and the fourth reflecting surface Q4 is used for reflecting the light from the third light reflecting structure 32 to the photodetector 2; the fourth reflecting surface Q4 is a convex surface.

[0208] The fourth reflecting surface Q4 is a convex surface, which can be a hyperbolic surface or a spherical surface.

[0209] In order to improve the light coupling efficiency, the photodetector 2 is located at the optical axis of the fourth light reflection structure 42, so that more light reflected by the fourth light reflection structure 42 can be projected onto the photodetector 2. It can also be understood that the optical axis of the fourth light reflection structure 42 passes through the center of the light receiving surface of the photodetector 2.

[0210] The light reflection region of the fourth light reflection structure 42 is in the light hole, so that the photodetector 2 can receive more light.

[0211] In order to improve the light coupling efficiency, in the example of FIG. 20, the positional relationship between the third light reflection structure 32 and the fourth light reflection structure 42 can be: in some examples, the optical axis of the third light reflection structure 32 and the optical axis of the fourth light reflection structure 42 can coincide, and the focal point of the third light reflection structure 32 and the focal point of the fourth light reflection structure 42 can not coincide. In some other examples, the optical axis of the third light reflection structure 32 and the optical axis of the fourth light reflection structure 42 can coincide, and the focal point of the third light reflection structure 32 and the focal point of the fourth light reflection structure 42 can coincide.

[0212] In some stylus, as shown in FIG. 20, the fourth light reflection structure 42 can be symmetrically arranged about the optical axis of the photodetector 2. In turn, the third light reflection structure 31 can receive more light from the light emitting device 1, improving the light coupling efficiency of the light emitting device 1.

[0213] The light emitted by the light emitting device 1 in the above example of FIG. 20 can be composite light. In this way, the stylus can be used for color picking, pattern picking with color, etc.

[0214] FIG. 21 is a structure diagram of another pen tail structure according to an embodiment of the present application, which shows the positional relationship between the light emitting device 1 and the photodetector 2. The light emitting device 1 and the photodetector 2 can be arranged along the length direction of the stylus, as shown in FIG. 21, the light emitting device 1 and the photodetector 2 can be arranged along the X direction.

[0215] The light emitting device 1 and the photodetector 2 in the example of FIG. 21 are arranged along the length direction of the stylus, which can improve the emission power of the light emitting device, improve the detection sensitivity of the photodetector, and improve the use performance of the stylus.

[0216] The difference between the example of FIG. 21 and the above example of FIG. 19 includes that the pen tail 103 includes a light transmission region 103A, the light transmission region 103A is an arc structure, in order to make more light reflected by the target object be received by the photodetector 2, as shown in FIG. 21, the reflection surface of the third light reflection structure 32 is a concave surface.

[0217] In the above structures of FIG. 2, FIG. 12, FIG. 19, and FIG. 21, the target object can be used for color picking.

[0218] In some scenarios, when the external environment light is relatively strong, the direct method can be used to take color. For example, the light emitting device 1 does not work, and the light signal reflected by the target object is measured by the photodetector 2, which can be referred to as a target spectrum, and the stylus converts the target spectrum into a color value.

[0219] In some scenarios, when the external environment light is relatively strong, the direct method can be used to take color. For example, the light emitting device 1 does not work, and the light signal reflected by the target object is measured by the photodetector 2, which can be referred to as a target spectrum, and the stylus converts the target spectrum into a color value.

[0220] FIG. 22 is a structure diagram of another pen tail given by an embodiment of the present application, which shows the positional relationship between the light emitting device and the photodetector. The light emitting device 1 and the photodetector 2 can be arranged along the length direction of the stylus, as shown in FIG. 22, the light emitting device 1 and the photodetector 2 can be arranged along the X direction.

[0221] The light emitting device 1 and the photodetector 2 in the example of FIG. 22 are arranged along the length direction of the stylus, which can improve the emission power of the light emitting device, improve the detection sensitivity of the photodetector, and improve the use performance of the stylus.

[0222] In the example of FIG. 22, the photodetector 2 is located on the light path of the light emitting device 1, which can be understood as: the setting position of the light emitting device 1 is closer to the pen body 101 than the setting position of the photodetector 2.

[0223] In some use scenarios, for example, using the stylus to take texture or pattern without following, the example shown in FIG. 22 can be used.

[0224] In the example of FIG. 22, the first light reflection structure 31 and the second light reflection structure 41 are sequentially arranged on the light path of the light emitting device 1, the first light reflection structure 31 is used to reflect the first light beam P1 with the first wavelength, and transmit the second light beam P2 with the second wavelength, and project the second light beam P2 with the second wavelength onto the second light reflection structure 41.

[0225] The second light reflection structure 41 reflects the second light beam P2 with the second wavelength onto the first light reflection structure 31, and reflects it to the outside of the stylus through the first light reflection structure 31.

[0226] It can be understood that the first light reflection structure 31 as shown in FIG. 22 has a wavelength selection function, and can reflect the first light beam having the first wavelength and transmit the second light beam having the second wavelength.

[0227] In some examples, as shown in FIG. 22, the first light reflection structure 31 has opposite first and second surfaces S1 and S2, and the first surface S1 can have a first reflective film layer, which is configured to totally reflect the first light beam having the first wavelength and transmit the second light beam having the second wavelength.

[0228] The second light reflection structure 41 has a third surface S3, and the third surface S3 has a third reflective film layer, which is configured to totally reflect the second light beam having the second wavelength.

[0229] On the second surface S2 of the first light reflection structure 31, in addition to transmitting the second light beam having the second wavelength, part of the area is also configured to reflect the second light beam having the second wavelength reflected by the second light reflection structure 41.

[0230] In the above different examples, the assembly including the light emitting device, the photodetector, the first light reflection structure and the second light reflection structure can also be used as a detection device, which can be arranged in other electronic devices, such as wearable devices, such as watches, bracelets, etc. The detection device arranged in the wearable device can detect at least one of heart rate, blood pressure, blood oxygen, etc.

[0231] In the description of this specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0232] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A stylus, characterized by The application relates to a stylus, comprising: a stylus shell; a light-emitting device, a photodetector, a first light-reflecting structure and a second light-reflecting structure arranged in the stylus shell; the photodetector is arranged on the light path of the light-emitting device; the first light-reflecting structure is arranged on the light path of the light-emitting device and is used for reflecting light from the light-emitting device; the second light-reflecting structure is arranged on the light path of the reflected light of the first light-reflecting structure and is used for reflecting light from the first light-reflecting structure.

2. The stylus of claim 1, wherein, The light-emitting device and the photodetector are arranged along the length direction of the stylus shell; the first light-reflecting structure is arranged on the side of the photodetector facing the light-emitting device; the second light-reflecting structure is arranged between the light-emitting device and the first light-reflecting structure; the second light-reflecting structure is provided with a light-passing hole, and the light-emitting device can project light to the first light-reflecting structure through the light-passing hole; the part of the second light-reflecting structure located at the periphery of the light-passing hole forms a reflecting part, and the reflecting part is used for reflecting the reflected light from the first light-reflecting structure.

3. The stylus of claim 2, wherein, The second light-reflecting structure comprises one mirror, and the light-passing hole is arranged on the one mirror.

4. The stylus according to claim 2 or 3, wherein: the first light-reflecting structure is symmetrical about the optical axis of the light-emitting device; or the reflecting part is symmetrical about the optical axis of the light-emitting device.

5. The stylus according to any one of claims 2-4, characterized in that, The optical axis of the first light-reflecting structure passes through the center of the light-emitting surface of the light-emitting device, and the light-emitting area of the light-emitting device is located in the light-passing hole; or the focal point of the first light-reflecting structure coincides with the focal point of the second light-reflecting structure.

6. The stylus according to any one of claims 1 to 5, characterized in that, The stylus shell comprises a light-transmitting area, and the light-transmitting area is an arc structure protruding towards the outside of the stylus shell.

7. The stylus according to claim 6, wherein, The reflecting surface of the second light-reflecting structure is a concave surface, and the concave surface is used for reflecting the light from the first light-reflecting structure to the arc structure, and the light emitted from the arc structure is parallel light.

8. The stylus according to any one of claims 1-7, wherein, The first light-reflecting structure comprises a first reflecting surface, and the first reflecting surface is a convex surface, and the first reflecting surface is used for reflecting the light from the light-emitting device to the second light-reflecting structure.

9. The stylus according to any one of claims 1-8, wherein, The second light-reflecting structure comprises a second reflecting surface, and the second reflecting surface is a concave surface, and the second reflecting surface is used for reflecting the light from the first light-reflecting structure.

10. The stylus according to any one of claims 1-9, wherein, The first light-reflecting structure or the second light-reflecting structure comprises a substrate and a reflecting film, and the reflecting film is stacked on the substrate.

11. The stylus according to claim 10, wherein: the reflecting film comprises a metal film, and the metal film is stacked on the substrate; or the reflecting film comprises a metal film and a dielectric film, the metal film is stacked on the substrate, and the dielectric film is stacked on the side of the metal film away from the substrate; or the reflecting film comprises a plurality of dielectric films, and the plurality of dielectric films are stacked on the substrate, and the refractive indexes of adjacent two layers of the dielectric films are different.

12. The stylus according to any one of claims 1-11, wherein, The stylus further comprises: a diffusion member arranged on the light path of the reflected light of the second light-reflecting structure.

13. A stylus, characterized by The application relates to a stylus, comprising: a stylus shell; a light emitting device, a photodetector, a third light reflecting structure and a fourth light reflecting structure located in the pen shell, the photodetector being configured to receive reflected light from a target object; the third light reflecting structure is located in the light path of the reflected light from the target object, and is configured to reflect the reflected light from the target object; the fourth light reflecting structure is located in the light path of the reflected light from the third light reflecting structure, and is configured to reflect the reflected light from the third light reflecting structure to the photodetector; the light emitting device is disposed on a side of the fourth light reflecting structure away from the photodetector, and the light emitting device and the fourth light reflecting structure are oppositely disposed.

14. The stylus of claim 13, wherein, the light emitting device and the photodetector are arranged along the length direction of the pen shell; the third light reflecting structure is disposed on a side of the light sensitive surface of the photodetector; the fourth light reflecting structure is disposed between the light emitting device and the third light reflecting structure; a light passing hole is formed on the third light reflecting structure, and the reflected light from the fourth light reflecting structure can pass through the light passing hole to project onto the photodetector; a reflecting portion is formed on the third light reflecting structure at the outer periphery of the light passing hole, and the reflecting portion is configured to reflect light from the target object.

15. The stylus of claim 14, wherein, the third light reflecting structure comprises one mirror, and the light passing hole is disposed on the one mirror.

16. The stylus according to claim 14 or 15, wherein the third light reflecting structure is symmetrical about the optical axis of the photodetector; or the reflecting portion is symmetrical about the optical axis of the photodetector.

17. The stylus according to any one of claims 14-16, wherein, an optical axis of the fourth light reflecting structure passes through the center of the light sensitive surface of the photodetector, and a reflecting light area of the fourth light reflecting structure is located within the light passing hole; or a focal point of the third light reflecting structure coincides with a focal point of the fourth light reflecting structure.

18. The stylus according to any one of claims 13-17, wherein, the pen shell comprises a light transmitting region, and the light transmitting region is an arc-shaped structure protruding towards the outside of the pen shell.

19. The stylus of claim 18, wherein, a reflecting surface of the third light reflecting structure is a concave surface, and the concave surface is configured to reflect light from the arc-shaped structure to the fourth light reflecting structure.

20. The stylus of any of claims 13-19, wherein, the third light reflecting structure comprises a third reflecting surface, and the third reflecting surface is a concave surface, and the third reflecting surface is configured to reflect light from the target object to the fourth light reflecting structure.

21. The stylus according to any one of claims 13-20, wherein, the fourth light reflecting structure comprises a fourth reflecting surface, and the fourth reflecting surface is a convex surface, and the fourth reflecting surface is configured to reflect light from the third light reflecting structure to the photodetector.

22. The stylus of any of claims 13-21, wherein, the third light reflecting structure or the fourth light reflecting structure comprises a substrate and a reflecting film, and the reflecting film is stacked on the substrate.

23. The stylus according to claim 22, wherein the reflecting film comprises a metal film, and the metal film is stacked on the substrate; or the reflecting film comprises a metal film and a dielectric film, the metal film is stacked on the substrate, and the dielectric film is stacked on a side of the metal film away from the substrate; or the reflecting film comprises a metal film and a dielectric film, the metal film is stacked on the substrate, and the dielectric film is stacked on a side of the metal film away from the substrate. The reflective film includes a multilayer dielectric film, the multilayer dielectric film is stacked on the substrate, and the refractive indexes of two adjacent layers of the dielectric film are different.

24. An electronic device, comprising: Comprising: A terminal body, the terminal body comprising a display screen; The stylus according to any one of claims 1-23.

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