TWI619058B - Electronic device having optical sensing function - Google Patents

Abstract

The invention relates to an electronic device with optical sensing function, which includes a display screen and an optical sensing module; wherein the optical sensing module is disposed outside a display area of the display screen and includes a light emitting device. A source, a first asymmetric lens having a two-phase non-coaxial first and second curved optical central axis, and a sensor corresponding to one side of the first asymmetric lens, the sensor comprising A photosensitive area, the central axis of the photosensitive area is not coaxial with the first curved optical central axis, and the sensor is used for receiving a reflection signal generated by the reflection of an optical signal by an object, and generating a sensing signal accordingly Result; wherein the projection of the sensing area of the optical sensing module on the display area includes the center of the display area.

Description

Electronic device with optical sensing function

The present invention relates to electronic devices, and more particularly to an electronic device that changes a non-contact gesture sensing area through optical design.

Since the optical sensing module detects the reflected light generated by a reflective object (for example, a user's hand) to recognize the movement of the reflective object, electronic devices (for example, a laptop, a smartphone / tablet, an interactive screen, etc.) The non-contact operation function can be realized by setting an optical sensing module therein.

The electronic device capable of non-contact operation fixes the optical sensing module and its display screen on a casing, and in order to avoid the overlapping of the setting space of the optical sensing module and the display screen, it is set on the display screen Of the periphery. However, since the optical sensing module is fixed on the casing, its sensing area is directly above the place where the optical sensing module is set; therefore, in order to allow the electronic device to pass through the optical sensing module Recognize the non-contact gesture of the user, the user is restricted to perform non-contact gesture operation directly above the optical sensing module to ensure that the optical sensing module can detect the reflection generated by the user's hand The signal is further provided to the electronic device for user gesture determination.

Therefore, when the user is performing a non-contact gesture operation (for example, swiping left and right), the user must first determine the setting position of the optical sensing module before moving the palm to its sensing area smoothly to perform the non-contact gesture operation. . In addition, in actual use, although the palm moves to the sensing area Range, but the elbow also blocked the display screen, causing the user to be confused as to whether the gesture was correctly recognized by the electronic device.

In summary, when a user performs a non-contact gesture operation for the first time, he intuitively performs a gesture operation directly above the center of the display area, instead of performing a gesture operation directly above the optical sensing module. In other words, the user must learn the area where the non-contact gesture is sensed through learning.

Therefore, an innovative optical sensing design is needed to provide a humanized, non-contact operation experience.

In view of this, a main object of the present invention is to provide an electronic device with an optical sensing function for changing a non-contact gesture sensing area through an optical design to solve the above-mentioned problems.

The main technical means of the present invention is that the electronic device with optical sensing function includes: a display screen with a display area; and an optical sensing module disposed outside the display area. The optical sensing module The set includes: a light-emitting unit including a light source for generating a light signal; a sensing unit including: a first asymmetric lens including a first curved surface and a second curved surface; A curved surface has a first curved optical central axis, and the second curved surface has a second curved optical central axis; wherein the first and second curved optical central axes are not coaxial; and a sensor is disposed correspondingly to the first curved optical central axis. On one side of an asymmetric lens, the sensor includes a photosensitive area, the central axis of the photosensitive area is not coaxial with the first curved optical central axis, and the sensor is used to receive the optical signal and is reflected by an object. A reflection signal generated, and a sensing result is generated based thereon; The projection of the sensing area of the optical sensing module on the display area includes the center of the display area.

The main technical means of the present invention is that another electronic device with an optical sensing function includes: a display screen having a display area; and an optical sensing module disposed outside the display area, the optical sensing The module includes: a light-emitting unit including: a first asymmetric lens including a first curved surface and a second curved surface, the first curved surface having a first curved optical central axis, and the second curved surface having a A second curved optical central axis; wherein the first and second curved optical central axes are not coaxial; a light source for generating a light signal corresponding to one side of the first asymmetric lens; the light source includes A light-emitting area, the central axis of the light-emitting area is not coaxial with the first curved optical central axis; and a sensing unit includes: a sensor including a photosensitive area for receiving the optical signal by a A reflection signal generated by the reflection of the object generates a sensing result accordingly; wherein the projection of the sensing area of the optical sensing module on the display area includes the center of the display area.

The electronic device of the present invention (for example, a portable mobile device such as a mobile phone and a tablet computer, a laptop, an interactive screen, etc.) mainly adjusts the non-contact type by changing the design of the optical path of the optical sensing module. The sensing area of the gesture allows the optical sensing module to provide the user with an intuitive and convenient operation experience without changing its setting mechanism.

10, 10’‧‧‧ electronic device

11‧‧‧chassis

12‧‧‧display

121‧‧‧ Center

20‧‧‧Optical Sensor Module

21‧‧‧light-emitting unit

22‧‧‧Sensing Unit

23‧‧‧light source

231‧‧‧center axis

24‧‧‧ Sensor

241‧‧‧center axis

25, 25a, 25b, 25c ‧‧‧ the first asymmetric lens

250, 260‧‧‧ geometric center axis

251, 251a, 251b, 251c‧‧‧ First surface

252, 252a, 252b, 252c‧‧‧Second surface

253, 253a ‧‧‧ the first curved optical central axis

253b, 213c ‧‧‧ the first curved optical central axis

254, 254a‧‧‧Second curved optical center axis

254b, 254c‧‧‧Second curved optical center axis

26, 26a‧‧‧Second asymmetric lens

26b, 26c‧‧‧Second asymmetric lens

261, 261a, 261b, 261c‧‧‧ Third surface

262, 262a, 262b, 262c‧‧‧ Fourth surface

263, 263a‧‧‧ Third curved optical center axis

263b, 263c‧‧‧ Third curved optical center axis

264, 264a‧‧‧ Fourth curved optical center axis

264b, 264c‧‧‧ Fourth curved optical center axis

30‧‧‧hands

FIG. 1A is a schematic diagram of a first preferred embodiment of an electronic device according to the present invention.

FIG. 1B: A view before FIG. 1A.

FIG. 2 is a schematic diagram of a second preferred embodiment of an electronic device according to the present invention.

Fig. 3: Schematic diagram of the side view of Fig. 1.

FIG. 4 is a top plan view of the first preferred embodiment of the optical sensing module of the present invention.

FIG. 5A is a schematic side view of the light emitting unit in FIG. 4.

FIG. 5B is a schematic side view of the sensing unit in FIG. 4.

6A is a schematic side view of a third preferred embodiment of an optical sensing module according to the present invention.

FIG. 6B is a schematic side view of a fourth preferred embodiment of the optical sensing module of the present invention.

FIG. 7A is a schematic side view of a fifth preferred embodiment of the optical sensing module of the present invention.

FIG. 7B is a schematic side view of a sixth preferred embodiment of the optical sensing module of the present invention.

8A is a schematic side view of a seventh preferred embodiment of the optical sensing module of the present invention.

8B is a schematic side view of an eighth preferred embodiment of the optical sensing module of the present invention.

FIG. 9 is a top plan view of a ninth preferred embodiment of the optical sensing module of the present invention.

FIG. 10A is a schematic side view of the light emitting unit in FIG. 9.

FIG. 10B is a schematic side view of the sensing unit in FIG. 9.

The present invention mainly proposes an electronic device, which uses a design of an optical path (for example, changing a light receiving range of a sensor in a space and / or changing a light emitting range of a lighting source in a space) to meet a user's non-contact habit Sensing area of the gesture. In order to facilitate understanding of the technical features of the present invention, several embodiments are described in detail below.

First, please refer to FIG. 1A. A first embodiment of an electronic device 10 of the present invention is a mobile device like a smart phone. The electronic device 10 of this embodiment includes a casing 11, a display screen 12, and a Optical sensing module 20; the display screen 12 and the optical sensing module 20 are fixed on the casing 11. The display screen 12 provides a display area D _N. As shown in FIG. 1B, the optical sensing module 20 provides a sensing area S 20. The projection of the sensing area S 20 on the display area D _N includes the display area D. The center 121 of _N is shown in FIG. 1B. Thus, when the user is accustomed to performing a gesture operation in front of the display area D _N , since the projection of the sensing area S20 on the display area D _N includes the display area D _N In the center 121, the optical sensing module 20 can smoothly sense a user's hand 30 located in front of the display area D _N , and then the electronic device 10 performs gesture recognition. As shown in FIG. 2, another second embodiment of the electronic device 10 ′ of the present invention is an electronic device like an interactive screen. Similarly, the user can smoothly perform gesture operations in front of the display area D _N ; Therefore, the electronic device 10 of the present invention may be a portable mobile device, such as a mobile phone, a tablet computer, a laptop, etc., or an interactive screen, but is not limited to these examples. The structure of the optical sensing module 20 is further described below to explain that the projection of the sensing area S20 on the display area D _N includes the center 121 of the display area D _N.

Please refer to FIG. 3. The optical sensing module 20 of the present invention includes a light-emitting unit 21 and a sensing unit 22. In conjunction with FIG. 4, a first preferred implementation of the optical sensing module 20 of the present invention is shown. For example, the light-emitting unit 21 includes a light-emitting source 23 (for example, an infrared light-emitting diode, a laser diode, or an ultraviolet light-emitting diode), or the light-emitting unit 21 is in addition to the light-emitting source 23. It further includes a first asymmetric lens 25; and the sensing unit 22 includes a sensor 24 (ie, an optical sensor), or the sensing unit 22 further includes a sensor 24 in addition to the sensor 24. There is a second asymmetric lens 26.

Please refer to FIG. 5A, which is a schematic side view of the light emitting unit 21 in FIG. 4. The light emitting unit 21 includes a light emitting source 23 and a first asymmetric lens 25. The first asymmetric lens 25 includes Two spherical and aspherical first and second curved surfaces 251, 252 having the same or different curvatures (the figure is represented by only two tangent lines of the first and second curved surfaces), the first curved surface 251 has a first A curved optical central axis 253, and the second curved surface 252 has a second curved optical central axis 254; wherein the first and second curved optical central axes 253 and 254 are not coaxial.

In this embodiment, the light source 23 faces the first curved surface 251 of the first asymmetric lens 25, and the central axis 231 of the light-emitting area SE of the light source 23 may be different from the first curved optical central axis 253. Coaxial, but coaxial with the second curved optical central axis 254; In addition, the central axis 231 of the light emitting area SE may also be coaxial with the first curved optical central axis 253, but with the second curved optical central axis 254 Non-coaxial, or non-coaxial with the first and second curved optical central axes 253, 254. In this embodiment, in order to minimize the size of the light emitting unit 21, a geometric central axis 250 of the first asymmetric lens 25 is further aligned with a central axis 231 of a light emitting region SE of the light emitting unit 21; Because the geometric center axis 250 is aligned with the geometric center of the first asymmetric lens 25, and the first or second curved optical center axis 253, 254 is determined by the curved surface corresponding to the first asymmetric lens 25 ; Therefore, with the first asymmetric lens 25 in this embodiment, the geometric center axis 250 and the first or second curved optical center axes 253 and 254 are axially opposite to each other, but if other shapes For the first asymmetric lens 25, it is not limited whether they are aligned with each other.

In this embodiment, after the light emitted by the light source 23 passes through the first curved surface 251, it is refracted and passes through the second curved surface 252; therefore, according to FIG. 3, the first asymmetric lens 25 is transmitted through The light S1 of the light emitting unit 21 can be emitted to form the sensing area S20. Since the light type emitted by the light emitting unit 21 shown in FIG. 5A is a divergent light type, the first curved surface 251 or the second curved surface 252 is a concave curved surface.

Similarly, 1B, such that the optical sensing module sensing region 20 of the display region D _N S20 including a center projection 121 of the display region D _N may be further shown in Figure 5B, the optical sensor The sensing unit 22 of the measurement module includes a sensor 24 and a second asymmetric lens 26, and the sensor 24 is disposed on one side of the second asymmetric lens 26. The second asymmetrical 26 lens also includes two third and fourth curved surfaces 261, 262 with spherical or aspherical surfaces having the same or different curvatures (the figure is only represented by the two tangents of the first and second curved surfaces), The third curved surface 261 has a third curved optical central axis 263, and the fourth curved surface 262 has a fourth curved optical central axis 264; wherein the third and fourth curved optical central axes 263 and 264 are not coaxial.

In this embodiment, the sensor 24 is directed toward the third curved surface 261 of the second asymmetric lens 26, and the central axis 241 of the sensing area SA of the sensor 24 is aligned with the third curved optical center. The axis 263 is not coaxial, but is coaxial with the fourth curved optical central axis 264. In addition, the central axis 241 of the sensing area SA may also be coaxial with the third curved optical central axis 263, but with the fourth curved surface. The optical central axis 264 is not coaxial or is not coaxial with the third and fourth curved optical central axes 263, 264. In this embodiment, in order to minimize the size of the sensing unit 22, a geometric central axis 260 of the second asymmetric lens 26 is further connected to a central axis 231 of a sensing area SA of the sensing unit 22. Alignment; wherein the geometric central axis 260 is aligned with the geometric center of the second asymmetric lens 26, and the first or second curved optical central axis 263, 264 is corresponding to the second asymmetric lens 26 Therefore, with the second asymmetric lens 26 of this embodiment, the geometrical central axis 260 and the first or second curved optical central axes 263 and 264 are axially opposite, but if For the second asymmetric lens 26 having other shapes, it is not limited whether they are aligned with each other.

As shown in FIG. 5B, when the user's hand 30 appears in the sensing area, his hand 30 is irradiated with light and then reflects the light S2. After the reflected light S2 is irradiated to the sensing unit 24, it first passes through the second The fourth curved surface 262 of the asymmetric lens 26 is refracted and then projected onto the sensor 24 through the third curved surface 261, so that the sensor 24 senses the light S2 reflected by the user's hand 30 . Therefore, as shown in the figure, the sensing unit 24 can receive the light S2 reflected by the hand 30 in front of the display area D _N through the second asymmetric lens 26. Because the range of reflected light received by the sensing unit 24 shown in FIG. 5B is relatively wide, the third curved surface 261 or the fourth curved surface 262 is a concave curved surface.

Please refer to FIG. 6A again, which is a third preferred embodiment of the optical sensing module 20. The light-emitting unit is substantially the same as that in FIG. 5A, and includes a light-emitting source 23 and a first asymmetric lens 25. However, this embodiment A first asymmetric lenticular lens is used as the first asymmetric lens 25a of the light-emitting unit 21; in this embodiment, the light emitting source 23 faces a first curved surface 251a of the asymmetric lenticular lens, and the first curved surface The axis of the first curved optical central axis 253a of 251a is not coaxial with the central axis 231 of the light emitting region SE of the light source 23, but the second curved optical central axis 254a of the second curved surface 252a is at the center of the light emitting region SE. The shaft 231 is coaxial. As shown in FIG. 6A, the light emitted by the light source 23 is refracted after passing through the first curved surface 251a and emitted outward through the second curved surface 252a to adjust the light path of the light emitted by the light emitting unit 21; adjusting the light path, the present embodiment to achieve the same so that the optical sensing module sensing region 20 comprises S20 of the center of the display region of projection D _N D _N of the display region.

Similarly, the sensing unit 22 of the optical sensing module shown in FIG. 6B also uses a second asymmetric lenticular lens as the second asymmetric lens 26a of the sensing unit 22. In this embodiment, the The sensor 24 faces the third curved surface 261a of the second non-called lenticular lens, and the central axis 241 of the photosensitive area SA is not coaxial with the third curved optical center axis 263a, but is fourth with the fourth curved surface 262a. The curved optical central axis 264a is coaxial. As shown in the figure, the sensor 24 senses the light refracted by the second asymmetric lenticular lens 26a; therefore, the optical path of the light received by the optical sensing module 20 of this embodiment can pass through the second non-symmetrical lenticular lens 26a. The symmetric lenticular lens 26a is adjusted to realize a structure in which the projection of the sensing area S20 of the optical sensing module 20 on the display area D _N includes the center of the display area D _N.

As shown in FIG. 7A, it is a fifth preferred embodiment of the optical sensing module 20. The light emitting unit 21 is substantially the same as FIG. 6A, but the light emitting source 23 uses a different first asymmetric lens 25b, that is, the light emitting The central axis 231 of the light-emitting area SE of the source 23 is coaxial with the first curved optical central axis 253b, and is not coaxial with the second curved optical central axis 254b. As shown in the figure, the light emitted by the luminous source 23 passes through After the first curved surface 251b is refracted through the second curved surface 252b, the light path of the light emitted by the light emitting unit 21 is also changed. Similarly, in the sensing unit 22 of FIG. 7B, a different second asymmetric lens 26b is used, that is, the central axis 241 of the sensing area SA is also coaxial with the third optical central axis 263b of the third curved surface 261b, and The fourth curved optical center axis 264b is not coaxial with the fourth curved surface 262b.

As shown in FIG. 8A, this is a seventh preferred embodiment of the optical sensing module 20. The light emitting unit 21 is substantially the same as FIG. 6A, but the light emitting source 21 uses a different first asymmetric lens 25c, that is, the light emitting The central axis 231 of the light emitting area SE of the source 21 is not coaxial with the first curved optical central axis 253c of the first curved surface 251c and the second curved optical central axis 254c of the second curved surface 252c; The emitted light is refracted through the first curved surface 251c and the second curved surface 252c, and the light path of the light emitted by the light emitting unit 21 is also changed. Similarly, in the sensing unit 22 of FIG. 8B, a different second asymmetric lens 26c is used, that is, the central axis 241 of the sensing area SA is also the third curved optical central axis 263c and the fourth curved optical central axis 264c. Not coaxial.

Please refer to FIG. 9 again, which is a ninth preferred embodiment of the optical sensing module 20 of the present invention, and is substantially the same as the optical sensing module 20 shown in FIG. 4, except that the light emitting unit in this embodiment The light emitting source 23 of 21 is matched with another first asymmetric lens 25 ', that is, as shown in FIG. 10A, the light emitting region SE of the light emitting unit 21 and the first asymmetric lens 25' partially overlap, and the light emitting region SE The central axis 231 is not aligned with the geometric central axis 250 of the first asymmetric lens 25 ′. Similarly, as shown in FIG. 10B, the sensor 24 of the sensing unit 22 can also be used with another second asymmetric lens 26 ′, wherein the sensing area SA of the sensing unit 22 and the second asymmetric lens 26 ′. The lenses 26 'are partially overlapped, and the central axis 241 of the sensing area SA is not aligned with the geometric central axis 260 of the second asymmetric lens 26'.

It can be known from the embodiments of the optical sensor module disclosed earlier that the light path of the emitted light or the incident light can be changed by using an asymmetric lens; therefore, as shown in FIGS. 1A, 1B and 2, even if the optical sensor module is fixed at On the chassis, but by adjusting the light path, the sensing area is projected on the display area to include the center of the display area, so that the optical sensing module can smoothly sense the user's hand located in front of the display area. The electronic device performs gesture recognition. In addition, if the central axis of the light emitting area of the light source is further aligned with the geometric central axis of the first asymmetric lens, as shown in FIG. 4, the emission light path will pass through the geometric central axis of the first asymmetric lens; and Align the central axis of the photosensitive area of the sensor with the geometric central axis of the second asymmetric lens, that is, the emission light path will pass through the second asymmetric lens. Any central axis, the minimum size of the optical sensing module can be designed under the premise of adjusting the position of the sensing area to improve the application flexibility of the optical sensing module.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the scope of patent application of the present invention shall fall within the scope of the present invention.

21‧‧‧light-emitting unit

23‧‧‧light source

231‧‧‧center axis

25‧‧‧The first asymmetric lens

250‧‧‧ geometric center axis

251‧‧‧first surface

252‧‧‧Second Surface

253‧‧‧The first curved optical axis

254‧‧‧Second curved optical center axis

Claims (22)

An electronic device with optical sensing function includes: a display screen with a display area; and an optical sensing module disposed outside the display area. The optical sensing module includes: a light-emitting unit, A light source is included for generating a light signal. A sensing unit includes a first asymmetric lens including a first curved surface and a second curved surface. The first curved surface has a first curved optical surface. A central axis, the second curved surface having a second curved optical central axis; wherein the first and second curved optical central axes are not coaxial; and a sensor corresponding to one side of the first asymmetric lens, The sensor includes a photosensitive region, a central axis of the photosensitive region is not coaxial with the first curved optical central axis, and the sensor is used to receive a reflection signal generated by the reflection of an optical signal by an object, and A sensing result is generated according to this; wherein a projection of a sensing area of the optical sensing module on the display area includes a center of the display area. According to the electronic device described in claim 1, a curvature of the first curved surface is different from a curvature of the second curved surface. The electronic device according to claim 1 or 2, wherein: the first curved surface is a side close to the sensor; and the second curved surface is a side far from the sensor. The electronic device according to claim 1 or 2, wherein: the first curved surface is a side far from the sensor; and the second curved surface is a side close to the sensor. According to the electronic device of claim 3, the central axis of the photosensitive area is not coaxial with the optical central axis of the second curved surface. According to the electronic device according to claim 1 or 2, the first curved surface is a concave spherical surface, a convex spherical surface, a concave aspheric surface, or a convex aspheric surface; and the second curved surface is a concave spherical surface, a convex spherical surface, a concave surface. Aspheric or convex aspheric. According to the electronic device of claim 1 or 2, the central axis of the photosensitive area of the sensor is aligned with a geometric central axis of the first asymmetric lens. The electronic device according to claim 1 or 2, further comprising a second lens, and the optical signal generated by the light source is transmitted to the sensing area through the second lens. An electronic device with optical sensing function includes: a display screen with a display area; and an optical sensing module disposed outside the display area. The optical sensing module includes: a light-emitting unit, It includes: a first asymmetric lens including a first curved surface and a second curved surface, the first curved surface has a first curved optical central axis, and the second curved surface has a second curved optical central axis; The first and second curved optical central axes are not coaxial; a light source for generating a light signal corresponding to one side of the first asymmetric lens, the light source includes a light emitting area, and a light emitting area The central axis is not coaxial with the first curved optical central axis; and a sensing unit includes: a sensor including a photosensitive area for receiving a reflection signal generated by the reflection of the optical signal by an object And generate a sensing result accordingly; wherein the projection of the sensing area of the optical sensing module on the display area includes the center of the display area. According to the electronic device of claim 9, a curvature of the first curved surface is different from a curvature of the second curved surface. The electronic device according to claim 9 or 10, wherein: the first curved surface is a side close to the light source; and the second curved surface is a side far from the light source. The electronic device according to claim 9 or 10, wherein: the first curved surface is a side far from the light source; and the second curved surface is a side close to the light source. According to the electronic device of claim 11, a central axis of the light-emitting area is not coaxial with the second curved optical central axis. The electronic device according to claim 9 or 10, the first curved surface is a concave spherical surface, a convex spherical surface, a concave aspheric surface, a convex aspheric surface; the second curved surface is a concave spherical surface, a convex spherical surface, a concave non-surface Spherical, convex aspheric. According to the electronic device of claim 9 or 10, a central axis of the light emitting area of the light source is aligned with a geometric central axis of the first asymmetric lens. The electronic device according to claim 9 or 10, further comprising a second asymmetric lens including a third curved surface and a fourth curved surface, the third curved surface having a third curved optical central axis, and the fourth curved surface There is a fourth curved optical central axis; wherein the third and fourth curved optical central axes are not coaxial; a central axis of the photosensitive region is not coaxial with the third curved optical central axis. According to the electronic device of claim 16, the curvature of the third curved surface is different from the curvature of the fourth curved surface. The electronic device according to claim 16, wherein: the third curved surface is a side close to the sensor; and the fourth curved surface is a side far from the sensor. The electronic device according to claim 16, wherein: the third curved surface is a side far from the sensor; The fourth curved surface is a side close to the sensor. According to the electronic device as claimed in claim 18, a central axis of the photosensitive region is not coaxial with the optical central axis of the fourth curved surface. The electronic device according to claim 16, the third curved surface is a concave spherical surface, a convex spherical surface, a concave aspheric surface, a convex aspheric surface; the fourth curved surface is a concave spherical surface, a convex spherical surface, a concave aspheric surface, A convex aspheric surface. According to the electronic device of claim 16, the central axis of the photosensitive area of the sensor is aligned with the geometric central axis of the second asymmetric lens.