TWI663415B - Proximity sensor module with two detectors - Google Patents

Abstract

The invention discloses a proximity sensing module with dual sensors, which includes a package housing, a circuit substrate, a light emitter and a sensing component. The package housing includes a first package structure, a second package structure, a partition structure, a first receiving space defined by the first package structure and the partition structure, and a package space defined by the second package structure and the partition structure. A second accommodation space. The light emitter is located in the first accommodation space and is disposed on the circuit substrate. The sensing component includes a first sensor and a second sensor. The first sensor and the second sensor are located in the second accommodating space, and the first sensor is farther away than the second sensor. Light emitter. Thereby, the first sensor receives a first reflected light emitted from the optical transmitter and reflected by a short-distance object to be measured, and the second sensor receives the first emitted light from the optical transmitter and passes a long-distance object. A second reflected light reflected by the object.

Description

Proximity sensing module with dual sensors

The invention relates to a proximity sensing module, in particular to a proximity sensing module with dual sensors.

Most existing mobile devices have a proximity sensor in the display screen to detect the user's face, ears, or hair, and to temporarily close the display screen when a short-range object is detected, on the one hand, to save power, On the one hand, it also prevents the user's face and ears from touching the screen by mistake, which affects the ongoing call.

On the market, the proximity sensor of mobile devices requires small openings or no openings. However, to achieve small or no openings, the proximity sensor can transmit far-infrared signals from the inside of the display panel. It will be greatly reduced, and the crosstalk phenomenon caused by the reflection of the signal from the inner side of the display panel will also increase.

In addition, the existing mobile devices mostly use a glass panel with a surface coating as a display screen, which can be coated with different color coatings and functional coatings as required. However, a glass panel with a coating is more common than a glass without a coating. Panels or opaque panels have higher light transmittance and reflectivity, resulting in a stronger crosstalk effect. The crosstalk effect reduces the signal-to-noise ratio measured by the proximity sensor, so it cannot effectively sense the proximity object.

In view of the above reasons, how to improve the structural design and make the proximity sensor still be able to detect the short-distance DUT under the environment of low far-infrared transmission efficiency and strong crosstalk has become the goal of this project. One of the important topics.

The technical problem to be solved by the present invention is to provide a proximity sensor with dual sensors in response to the shortcomings of the prior art. One of the dual sensors receives the light reflected by the object to be measured at a short distance, and the other The sensor receives the light reflected from the object to be measured at a long distance, so that the proximity sensor with dual sensors can still detect the object at a short distance in an environment with a high crosstalk effect.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide a proximity sensor module with dual sensors, which includes a package housing, a circuit substrate, a light emitter, and a sensor. Components. The package housing includes a first package structure, a second package structure, a partition structure, a first accommodating space defined by the first package structure and the partition structure cooperating with each other, and the first housing space A second accommodating space defined by the second packaging structure and the partition structure cooperating with each other. The circuit substrate carries the first package structure and the second package structure. A light emitter located in the first accommodation space and disposed on the circuit substrate. A sensing component, the sensing component includes a first sensor and a second sensor, the first sensor and the second sensor are located in the second accommodation space and It is disposed on the circuit substrate, and the first sensor is farther from the light emitter than the second sensor. The first sensor is configured to receive a first reflected light emitted from the light transmitter and reflected by a short distance object to be measured, and the second sensor is configured to receive a first reflected light from the light transmitter. A second reflected light emitted from and reflected by a long-distance object to be measured.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a proximity sensor module with dual sensors, which includes a package housing, a circuit substrate, a light emitter, and a sensor. Component and an optical isolator. The package housing includes a first package structure, a second package structure, a first partition structure, a second partition structure, and a structure defined by the first package structure and the first partition structure cooperating with each other. A first accommodating space, a second accommodating space formed by the first partition structure and the second partition structure together, and defined by the cooperation of the second partition structure and the second packaging structure A third accommodation space.所述 电 The electric The circuit substrate carries the first package structure and the second package structure. The light emitter is located in the first accommodation space and is disposed on the circuit substrate. A sensing component, the sensing component includes a first sensor and a second sensor, the first sensor is located in the second accommodation space and is disposed on the circuit substrate; The second sensor is located in the third accommodating space and disposed on the circuit substrate. The first sensor is closer to the light emitter than the second sensor. An optical isolator, wherein the optical isolator is disposed on the second separation structure, and is used to limit a sensing angle of the second sensor. The first sensor is configured to receive a first reflected light emitted from the light transmitter and reflected by a short-distance test object, and the second sensor is configured to receive a first reflected light from A second reflected light emitted from and reflected by a long-distance object to be measured.

One of the beneficial effects of the present invention is that the proximity sensing module with dual sensors provided by the present invention can pass "the light emitter is located in the first accommodation space and disposed on the circuit substrate. Up "and" the first sensor and the second sensor are located in the second accommodating space and disposed on the circuit substrate, and the first sensor is less than the second sensor "Sensor is far away from the light transmitter", so that the first sensor receives a first reflected light emitted from the light transmitter and reflected by a short distance object to be measured, and The second sensor is configured to receive a second reflected light emitted from the light transmitter and reflected by a long-distance object to be measured.

In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and description, and are not intended to limit the present invention.

P‧‧‧mobile device

M‧‧‧ Panel

Z‧‧‧ Proximity Sensor Module

1‧‧‧ Encapsulated Housing

11‧‧‧first package structure

12‧‧‧Second package structure

13‧‧‧ partition structure

131‧‧‧ first partition structure

132‧‧‧Second partition structure

R1‧‧‧First accommodation space

R2‧‧‧Second accommodation space

R3‧‧‧Third accommodation space

2‧‧‧circuit board

3‧‧‧ light emitter

4‧‧‧ Photosensitive components

41‧‧‧first sensor

θ1, θ2, θ3‧‧‧ the sensing angle of the first sensor

42‧‧‧Second sensor

φ1, φ2, φ3‧‧‧ sensing angle of the second sensor

d1, d2, d3‧‧‧ distance

5‧‧‧ Optical Isolator

6‧‧‧first lens

7‧‧‧Second lens

L1‧‧‧ the first reflected light

L2‧‧‧Second reflected light

1 is a schematic cross-sectional view of a mobile device using a proximity sensor module with dual sensors in a first embodiment of the present invention; FIG. 2 is a schematic view of a mobile device using a proximity sensor module with dual sensors in a second embodiment of the present invention Schematic cross-section of a mobile device; 3 is a schematic cross-sectional view of a mobile device using a proximity sensor module with dual sensors according to a third embodiment of the present invention; and FIG. 4 is an operation of the proximity sensor module with dual sensors according to a third embodiment of the present invention Signal-to-noise ratio at time.

The following is a description of the implementation of the “proximity sensing module with dual sensors” disclosed by the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention may be implemented or applied through other different specific embodiments, and various details in this specification may also be based on different viewpoints and applications, and various modifications and changes may be made without departing from the spirit of the present invention. In addition, the drawings of the present invention are merely a schematic illustration, and are not drawn according to actual dimensions, and are stated in advance. The following embodiments will further describe the related technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention.

[First embodiment]

Please refer to FIG. 1. FIG. 1 is a schematic cross-sectional view of a mobile device P1 using a proximity sensor module Z with dual sensors according to a first embodiment of the present invention. The proximity sensor module Z is disposed on a panel M of the mobile device P1 The inside and the proximity sensing module Z include: a package housing 1, a circuit substrate 2, a light emitter 3, and a sensing component 4. In this embodiment, the panel M of the mobile device P using the proximity sensing module Z of the present invention is a glass panel with a surface coating, but the present invention is not limited thereto.

Further, the package housing 1 includes a first package structure 11, a second package structure 12, a partition structure 13, and a first accommodating space defined by the first package structure 11 and the partition structure 13 cooperating with each other. R1 and a second accommodating space R2 defined by the mutual cooperation of the second packaging structure 12 and the partition structure 13. The circuit substrate 2 carries a first package structure 11 and a second package structure 12. The light emitter 3 is located in the first accommodation space R1 and is disposed on the circuit substrate 2.

As shown in FIG. 1, the sensing component 4 includes a first sensor 41 and a second sensor 42. The first sensor 41 and the second sensor 42 are located in the second accommodation space R2 and are disposed. On the circuit board 2. The first sensor 41 is farther from the light transmitter 3 than the second sensor 42, wherein the first sensor 41 is used to receive a light emitted from the light transmitter 3 and reflected by a short distance object to be measured. The first reflected light L1 and the second sensor 42 are used for receiving a second reflected light L2 emitted from the light emitter 3 and reflected by a long-distance object to be measured.

Specifically, since the second sensor 42 is adjacent to the partition structure 13, light from one side of the partition structure 13 is blocked by the partition structure 13 and cannot be received by the second sensor 42. The side of the measurement angle φ1 adjacent to the separation structure 13 is restricted. In other words, due to the isolation of the separation structure 13, the second sensor 42 is less able to receive light from the light transmitter 3 and reflected by the panel M. The viewing angle of the first sensor 41 is limited only by the adjacent second packaging structure 12. Therefore, the sensing angle θ1 of the first sensor 41 can cover light from the light emitter 3 side.

With the above structure, most of the light mainly received by the first sensor 41 is the first reflected light L1 emitted from the light emitter 3 and reflected by a short-distance object to be measured, and the second sensor 42 is mainly Most of the received light is the second reflected light L2 emitted from the light transmitter 3 and reflected by a long distance object to be measured.

In detail, as shown in FIG. 1, the proximity sensing module Z of the present invention further includes an optical isolator 5. The optical isolator 5 is disposed on the separation structure 13 to limit the sensing of the second sensor 42. Angle of view φ1. As shown in the figure, the optical isolator 5 extends the height of the separation structure 13, thereby further limiting the sensing angle φ1 of the second sensor 42. However, the present invention is not limited to this. In other embodiments, the sensing angle φ1 of the second sensor 42 may be limited only by the separation structure 13.

Furthermore, when the distance between the panel M and the proximity sensor module Z is small, it is possible to limit the sensing angle φ1 of the second sensor 42 without providing the optical isolator 5. The interval is large, and the provision of the optical isolator 5 can not only restrict the crosstalk light received by the second sensor 42 from being reflected by the panel M, but also prevent it from being transmitted from the panel M. The light leaked from the proximity sensor module Z and the external light entering from it can further reduce the crosstalk phenomenon. In addition, the light isolator 5 is made of an opaque material, and is preferably a stretchable material.

As shown in FIG. 1, the proximity sensing module Z of the present invention further includes a first lens 6. As shown in the figure, the first lens 6 is located in the first accommodation space R1 and is disposed on the circuit substrate 2, and the first lens 6 covers the light emitter 3. With the arrangement of the first lens 6, the light direction of the light emitter 3 can be better controlled. In other embodiments, the direction of the light emitted by the light emitter 3 may be controlled by other methods.

Specifically, the light emitter 3 of the proximity sensing module Z of the present invention is an infrared light emitting diode. However, the present invention is not limited to this. In other embodiments, the light emitter 3 may also be another light source for proximity sensing.

The proximity sensor module Z of the present invention is configured with two sensors, namely a first sensor 41 and a second sensor 42, and the second sensor 42 is disposed close to the light emitter 3 and the first sensor The detector 41 is disposed far away from the light transmitter 3, and the separation structure 13 located between the light transmitter 3 and the second sensor 42 is used to greatly reduce the crosstalk light received by the second sensor 42. With the above structure, the proximity sensing module Z of the present invention enables the first sensor 41 to receive most of the light (and crosstalk light) from the light transmitter 3 and reflected by the panel M and the object to be measured at a short distance. The reflected light, and the second sensor 42 is used to receive most of the light from the light transmitter 3 and reflected by the object to be measured at a long distance.

[Second embodiment]

Please refer to FIG. 2, the second embodiment of the present invention is substantially the same as the first embodiment, and the same components have the same component numbers and the same functions, which are not described herein again. The difference between the second embodiment and the first embodiment is that the proximity sensing module Z with dual sensors in the second embodiment further includes an optical path correction element. As shown in FIG. 2, in this embodiment, the light path correction element is a second lens 7, which covers the first sensor 41 and the second sensor 42, wherein the first sensor The sensor 41 and the second sensor 42 are respectively located on both sides of the main axis of the second lens 7.

Further, as shown in FIG. 2, the sensing angle θ2 of the first sensor 41 can be adjusted by the second lens 7 to shift in a direction close to the light emitter 3, and the sensing of the second sensor 42 The measurement angle φ2 is shifted away from the light emitter 3 by the adjustment of the second lens 7.

With the above structure, the present invention can increase the first sensor 41 of the proximity sensor module Z with dual sensors to receive light from the light transmitter 3 and reflected by the panel M and the object to be measured at a short distance. The two sensors 42 reduce the light received from the light transmitter 3 and are reflected by the panel M and the object to be measured at a short distance, so that the proximity sensor module Z with dual sensors can achieve a better proximity effect.

It should be noted that the present invention is not limited to the implementation of the light path correction element described above. In other embodiments, the light path correction element may be an element or a structure other than a lens.

[Third embodiment]

Referring to FIG. 3, the third embodiment of the present invention is substantially the same as the first and second embodiments, and the same is not described here. One difference between the third embodiment of the present invention and the first and second embodiments is that the package housing 1 of the proximity sensor module Z with dual sensors of the third embodiment includes a first package structure 11 A second packaging structure 12, a first separating structure 131, a second separating structure 132, a first accommodating space R1 defined by the first packaging structure 11 and the first separating structure 131 cooperating with each other, A partition structure 131 and a second partition structure 132 together form a second accommodating space R2 and a third accommodating space R3 defined by the mutual cooperation of the second partition structure 14 and the second packaging structure 12.

Further, the third embodiment of the present invention is different from the first and second embodiments in that, in the first and second embodiments, the first sensor 41 is farther away than the second sensor 42 The light transmitter 3, and in this embodiment, the first sensor 41 is closer to the light transmitter 3 than the second sensor. In detail, the first sensor 41 is located The second accommodation space R2 is disposed on the circuit substrate 2, and the second sensor 42 is located in the third accommodation space R3 and disposed on the circuit substrate 2. Furthermore, in this embodiment, the optical isolator 5 is disposed on the second separation structure 132 to limit the sensing angle φ3 of the second sensor.

In this embodiment, the first sensor 41 is the same as the first sensor 41 of the first embodiment, and is used for receiving the first emitted from the light transmitter 3 and reflected by a short distance object to be measured. The reflected light L1, and the second sensor 42 is the same as the second sensor 42 of the first embodiment for receiving the second reflected light emitted from the light transmitter 3 and reflected by a long distance object to be measured L2.

In more detail, in this embodiment, since the second sensor 42 is farther from the light emitter 3 than the second sensor 42 in the first and second embodiments, it is blocked by the optical isolator 5 The light emitted from the light transmitter 3 and reflected by the panel M, so the second sensor 42 has a higher probability of receiving the light (crosstalk light) emitted by the light transmitter 3 and reflected by the panel M than in the first and second embodiments. The second sensor 42 is smaller. On the other hand, since the first sensor in this embodiment is closer to the light transmitter 3 than the first sensor 41 in the first and second embodiments, it can receive more from the light transmitter 3 and The light reflected by the panel M and the object to be measured at a short distance.

Therefore, in this embodiment, with the above structure, the first sensor 41 receives the first reflected light L1 emitted from the light transmitter 3 and is reflected by the object to be measured at a short distance, and the second sensor 42 is received from The second reflected light L1 emitted by the light transmitter 3 and reflected by the object to be measured at a long distance enables the proximity sensing module Z of the present invention to have better proximity sensing capabilities.

Please refer to FIG. 4, which shows a schematic diagram of a signal-to-noise ratio of a proximity sensor module Z with dual sensors according to a third embodiment of the present invention during operation. As shown in the figure, when the distance between the adjacent panel M is the shortest, the first sensor 41 has a higher signal-to-noise ratio than the second sensor 42, and as the sensing distance increases, the first sensor 41 receives The signal is weakened and the signal received by the second sensor 42 is enhanced. Therefore, the second sensor 42 has a higher signal-to-noise ratio than the first sensor 41.

Further, with reference to FIG. 4, the first sensor 41 and the second sensor 42 may have a near threshold and a far threshold respectively. For example, when the first sensor 41 and the second sensor The approach thresholds of 42 are 4dB, and the distance thresholds are 3dB. When an object to be measured approaches panel M from far to near, the object to be tested will trigger the first sensor 41 when the distance from panel M is d1 and d2. And the approaching threshold of the second sensor 42, and the mobile device P can determine that an object is relatively close to the panel M according to the first sensor 41 and the second sensor 42 being triggered to approach the threshold, and then the panel M sleeps. When the object under test continues to approach the panel M until the distance from the panel M is d3, the distance threshold of the second sensor 42 is triggered. However, since the signal-to-noise ratio of the first sensor 41 at this time is higher than 3 dB, the A distance threshold of the sensor 41 will not be triggered, so the mobile device P will not determine that the item has moved away from the panel M and restart the screen just because the distance threshold of the second sensor 42 is triggered.

Therefore, the proximity sensing module Z of the present invention can increase the sensing range of proximity sensing, reduce the probability of misjudgment, and improve the sensing capability for substances with low reflectivity (for example, hair).

[Advantageous Effects of the Embodiment]

One of the beneficial effects of the present invention is that the proximity sensor module Z with dual sensors provided by the present invention can pass “the light transmitter 3 is located in the first accommodation space R1 and disposed on the circuit substrate 2”. And "the first sensor 41 and the second sensor 42 are located in the second accommodating space R2 and disposed on the circuit substrate 2, and the first sensor 41 is farther from the light emitter 3 than the second sensor 42 ", So that the first sensor 41 receives a first reflected light L1 from the light emitter 3 and is reflected by a short-distance object to be measured, and the second sensor 42 receives from the light emitter A second reflected light L2 emitted by 3 and reflected by a long-distance test object.

The content disclosed above is only the preferred and feasible embodiment of the present invention, and therefore does not limit the scope of patent application of the present invention. Therefore, any equivalent technical changes made by using the description and drawings of the present invention are included in the application of the present invention. Within the scope of the patent.

Claims (6)

A proximity sensing module with dual sensors includes a package housing, the package housing including a first package structure, a second package structure, a partition structure, and the first package structure and A first accommodating space defined by the partition structure cooperating with each other and a second accommodating space defined by the second packaging structure and the partition structure cooperating with each other; a circuit substrate, the circuit substrate Carrying the first package structure and the second package structure; a light emitter, the light emitter is located in the first accommodation space and disposed on the circuit substrate; and a sensing component, The sensing component includes a first sensor and a second sensor, and the first sensor and the second sensor are located in the second accommodation space and disposed on the circuit substrate. Above, and the first sensor is farther from the light transmitter than the second sensor, wherein the first sensor is configured to receive the light emitted from the light transmitter and wait for a short distance. A first reflected light reflected by the object, and the second From the detector for receiving emitted light emitted by a second and by a distance reflecting light reflected analyte. The proximity sensing module with dual sensors according to claim 1, further comprising a first lens, the first lens is located in the first accommodation space and is disposed on the circuit substrate, so The first lens covers the light emitter. The proximity sensing module with dual sensors according to claim 1, further comprising an optical isolator, the optical isolator is disposed on the separation structure, and is used to restrict the second sensor. Sensing perspective. The proximity sensing module with dual sensors according to claim 1, wherein the light emitter is an infrared light emitting diode. The proximity sensing module with dual sensors according to claim 1, further comprising a light path correction element, the light path correction element is located in the second accommodation space, wherein the first sensor The sensing angle of the sensor is adjusted by the light path correction element to be shifted toward a direction close to the light emitter, and the sensing angle of the second sensor is adjusted by the light path correction element to Offset in a direction away from the light emitter. The proximity sensing module with dual sensors according to claim 5, wherein the light path correction element is a second lens, and the second lens covers the first sensor and the second sensor. The sensor, wherein the first sensor and the second sensor are respectively located on two sides of a main axis of the second lens.