WO2015113332A1

WO2015113332A1 - Photosensitive element, vehicle-mounted sunlight sensor mounted with same, and vehicle

Info

Publication number: WO2015113332A1
Application number: PCT/CN2014/076338
Authority: WO
Inventors: 是蓉珠
Original assignee: 江苏日盈电子股份有限公司
Priority date: 2014-01-29
Filing date: 2014-04-28
Publication date: 2015-08-06
Also published as: CN103759822A

Abstract

Provided are a photosensitive element, vehicle-mounted sunlight sensor mounted with same, and vehicle. The photosensitive element comprises a photosensitive chip, an anode pin and a cathode pin all encapsulated in an encapsulation layer (6); the anode pin and the cathode pin are respectively connected to an anode plug pin (1) and a cathode plug pin (2); the upper surface of the encapsulation layer is provided with a lens structure; the lens structure enables incident light to be refracted and projected onto the photosensitive chip. A combination of a convex lens (5) and a flat lens/ concave lens (4) enables the convex lens to change the light having a low incidence angle, and enables the concave lens to disperse the light vertical to or substantially vertical to the incident so as to improve the luminous sensitivity of the photosensitive element, thus increasing the detection speed and accuracy of the vehicle-mounted sunlight sensor.

Description

Description Photosensitive element and in-vehicle solar sensor and vehicle with the same

The present invention relates to the field of automotive electronics, and more particularly to a photosensitive member and an in-vehicle sun sensor and a vehicle mounted with the photosensitive member.

Background technique

With the development of electronic technology, modern automobile air conditioning system has been controlled by computer. The perfect automobile computer controlled air conditioning system can not only automatically adjust the temperature, humidity, cleanliness, grace and direction of the air inside the car, but also provide a good passenger. The ride environment ensures that passengers are placed in a comfortable air environment under different external climates and conditions, and fault detection is also possible. However, when the air-conditioning system automatically controlled by the on-board computer is working, the internal temperature of the vehicle is affected by various factors, such as: the setting of the temperature and air volume of the air-conditioning system, the strength of the external sunlight, and the external sunshine time.

When the sunlight outside the car shines into the car, the temperature rise or decrease in the car requires a certain buffer time. During this time, the air conditioning system remains in its original state, and the passenger will feel uncomfortable. In order to optimize the actual temperature in the vehicle according to the user setting value, multiple sensors are needed to detect the value of each environmental parameter, thereby transmitting the environmental data to the air conditioning control system, and the air conditioning control system automatically adjusts the work according to the obtained data. status.

The function of the sun sensor is to detect the irradiance of the sun outside the car. This parameter is an input condition of the algorithm logic of the automatic air conditioning system. When the car is facing the sun, the sun sensor will detect the high light intensity. The controller automatically reduces the outlet air temperature and blower speed.

The existing solar sensor has two shortcomings: First, when the light penetrates the side window and the front windshield enters the interior of the vehicle, the angle of the light irradiated onto the sensor is relatively low, and the sensor table cannot be uniformly illuminated. Description

Therefore, the sensitivity of the sensor to light sensing is relatively weak. Second, when the light is illuminated vertically, the light is not evenly distributed on the sunlight sensor, so the sensitivity of the sensor to light sensing is relatively weak. Summary of the invention

The technical problem to be solved by the present invention is: In order to solve the technical problem that the sunlight sensor is not sensitive to low-angle illumination light and vertical illumination light in the prior art, the present invention provides a photosensitive element and an on-vehicle sunlight sensor mounted with the same And vehicles. The technical solution adopted by the present invention to solve the technical problem thereof is: a photosensitive element for a vehicle-mounted solar sensor, comprising a photosensitive chip, an anode lead and a cathode lead, wherein the photosensitive chip, the anode lead and the cathode lead are packaged in In the encapsulation layer, the anode pin and the cathode pin are respectively connected with an anode pin and a cathode pin, and an upper surface of the encapsulation layer has a lens structure, and the lens structure can refract light and project on the light when incident. On the chip. The encapsulating layer in the present invention is transparent or translucent, and the translucent shape is a milky white diffusing agent added to the encapsulating layer, so that the encapsulating layer as a whole exhibits a frosted glass-like translucent structure, but is not limited thereto. The technical solution concentrates or diffuses the light through the lens design. When the incident angle of the light is low, the light can be condensed and concentrated on the photosensitive chip by the lens design, thereby improving the sensitivity of the photosensitive element to light.

The lens crust includes an intermediate concave lens and a convex lens around the concave lens. By combining the convex lens and the concave lens, the convex lens changes the light incident at a low angle, and the concave lens disperses the light incident vertically or substantially perpendicularly, further improving the sensitivity of the photosensitive member to illumination.

In order to enable the light to be accurately irradiated on the photosensitive chip, the convex lens has an annular shape, the concave lens is filled in the center of the annular convex lens, and the convex lens and the concave lens are circular and concentrically arranged. Description

The diameter of the concave lens is substantially the same as the width d of the photosensitive chip, and the central axis of the concave lens is perpendicular to the upper surface of the photosensitive chip.

As another technical solution, the lens structure includes a convex lens around the middle flat lens and the flat lens. Through the combination of the convex lens and the flat lens (the lens with the flat surface on the upper and lower surfaces, the light does not change when the light passes), the convex lens changes the light incident at a low angle, and improves the sensitivity of the photosensitive element to illumination.

In order to enable the light to be accurately irradiated on the photosensitive chip, the flat lens has an annular shape, and the flat lens is filled in the center of the annular concave lens, and the flat lens and the concave lens are circular and concentrically arranged. The flat lens has a diameter substantially equal to the width d of the photosensitive chip, and the central axis of the flat lens is perpendicular to the upper surface of the photosensitive chip.

In order to enable the photosensitive chip to receive illumination at multiple angles, the anode pins and the cathode pins are provided with creases, and the anode pins or/and the cathode pins are bent along the creases thereon and vertically inserted into the circuit board group. The angle between the normal line of the photosensitive chip and the circuit board group is (Γ180°).

In order to adapt to the inclination angle of the front cover of the vehicle, the photosensitive elements are two, connected by a common pin, and the remaining independent pins are inserted on the circuit board group, and the normal line of the photosensitive chip and the circuit board group are The angle is 3 (Γ150 °.

An in-vehicle solar sensor provided with the above-described photosensitive member includes a photosensitive member, an upper cover and a base located above the photosensitive member for filtering visible light, and the wiring board group of the photosensitive member is fixed to the base by a terminal wire.

A vehicle comprising an onboard sun sensor as described above.

An advantageous effect of the present invention is that the photosensitive member of the present invention and the in-vehicle sun sensor and the vehicle equipped with the photosensitive member, by combining the convex lens and the flat lens/concave lens, cause the convex lens to change the light incident at a low angle, and the concave lens is dispersed vertically or substantially perpendicularly. Light, to improve the light-sensitive elements Description

Sensitivity, so as to further improve the detection rate and accuracy of the vehicle sun sensor. DRAWINGS

The invention will now be further described with reference to the drawings and embodiments.

1 is a schematic structural view of Embodiment 2 of the present invention;

2 is a schematic structural view of an unassembled circuit board group in Embodiment 3 of the present invention;

3 is a schematic structural view of Embodiment 3 of the present invention; FIG. 4 is a schematic structural view of Embodiment 4 of the present invention;

Figure 5 is a plan view of Figure 1;

Figure 6 is a cross-sectional view taken along line A-A of Figure 2; Figure 7 is a schematic view of low-angle light incidence;

8 is a schematic diagram of vertical light incident; FIG. 9 is a schematic structural view of a vehicle sun sensor; FIG. 10 is a comparison diagram of sensitivity of the present invention and the prior art sunlight sensor; FIG. 11 is a three-dimensional relationship between the sunlight angle and the driving position of the vehicle during the test of the present invention. Figure

Figure 12 is a plan view of Figure 11; Figure 13 is a front view of Figure 11;

Figure 14 is a test data diagram of the embodiment in which the sun angle is 90° and the elevation angle is from 0 degrees to 180 degrees; Figure 15 is the test data of the embodiment 4 when the sun angle is 45° and the elevation angle is from 0 degrees to 180 degrees. Figure 16 is a test data diagram of the embodiment 4 when the sun angle is 0 ° and the elevation angle is from 0 to 180 degrees; Instruction manual

Figure 17 is a test data diagram of the embodiment 4 when the sun angle is -45 ° and the elevation angle is from 0 to 180 degrees;

Fig. 18 is a graph showing the test data of the embodiment in which the sun angle is -90° and the elevation angle is from 0 to 180 degrees.

In the figure: 1, anode pin, 11, crease, 2, cathode pin, 3, circuit board group, 4, concave lens, 5, convex lens, 6, encapsulation layer, 7, upper cover, 8, base, 9, terminal line , 10, public pins, 12, photosensitive chip. detailed description

The invention will now be described in detail with reference to the drawings. The drawings are simplified schematic diagrams, and only the basic structure of the invention is illustrated in a schematic manner, and thus only the configurations related to the present invention are shown. In the first embodiment of the present invention, the photosensitive element has a one-word structure including a photosensitive chip, an anode lead and a cathode lead, and the photosensitive chip, the anode lead and the cathode lead are all packaged in the translucent encapsulation layer 6, The anode lead and the cathode lead respectively lead to an anode pin 1 and a cathode pin 2, and the upper surface of the encapsulation layer 6 has a lens structure including a concave lens 4 in the middle and a convex lens 5 around the concave lens 4. The convex lens 5 has an annular shape, the inner ring of the convex lens 5 is higher than the outer ring, and the concave lens 4 is filled in the center of the annular convex lens 5. The convex lens 5 and the concave lens 4 are circular and concentrically arranged. The concave lens 4 has a diameter substantially equal to the width d of the photosensitive chip, and the central axis of the concave lens 4 is perpendicular to the upper surface of the photosensitive chip.

The embodiment further provides an in-vehicle solar sensor comprising the above-mentioned photosensitive element, an upper cover and a base above the photosensitive element for filtering visible light, and the circuit board group of the photosensitive element is fixed on the base by a terminal line. A vehicle includes the in-vehicle sunlight sensor in the embodiment.

The concave lens 4 in this embodiment can also be replaced with a flat lens. Instruction manual

As shown in FIG. 1, according to Embodiment 2 of the present invention, the photosensitive element has a one-word structure including a photosensitive chip, an anode lead and a cathode lead, and the photosensitive chip, the anode lead and the cathode lead are all packaged in a half. In the transparent encapsulation layer 6, the anode pin and the cathode pin respectively lead to the anode pin 1 and the cathode pin 2, and the anode pin 1 and the cathode pin 2 are provided with a fold 11 on which the anode pin 1 and the cathode pin 2 are placed. The crease 11 is vertically inserted and connected to the circuit board group 3, and the angle between the normal line of the photosensitive chip and the circuit board group 3 is 90°, and the upper surface of the encapsulation layer 6 has a lens structure, and the lens structure includes the middle. The concave lens 4 and the convex lens 5 around the concave lens 4.

The concave lens 4 in this embodiment can also be replaced with a flat lens.

As shown in FIG. 2 and FIG. 3, in the third embodiment of the present invention, the photosensitive element comprises a photosensitive chip, two sets of anode pins and cathode pins arranged in parallel, and the photosensitive chip, the anode pin and the cathode pin are packaged in a transparent manner. In the encapsulation layer 6, an anode pin and a cathode pin are respectively connected with an anode pin and a cathode pin, and one set of pins is longer than the other set of pins, and the anode pin and the cathode pin are provided with a fold 11, an anode pin 1 and a cathode pin. 2 is bent along the crease 11 thereon and vertically inserted on the circuit board group 3, and the angle between the normal line of the photosensitive chip and the circuit board group 3 depends on the difference between the lengths of the two sets of pins, the encapsulation layer 6 The upper surface has a lens structure, and the lens structure includes a concave lens 4 in the middle and a convex lens 5 around the concave lens 4. The convex lens 5 and the concave lens 4 are both circular and concentrically arranged in a unitary structure.

As shown in FIG. 4-6, which is Embodiment 4 of the present invention, two photosensitive elements are disposed symmetrically, including a photosensitive chip 12, an anode lead and a cathode lead, a photosensitive chip 12, an anode lead and a cathode lead. They are all packaged in a transparent encapsulation layer 6, and an anode pin and a cathode pin are respectively connected with an anode pin and a cathode pin, and the anode pin and the cathode pin are provided with a fold, and the two photosensitive elements pass through the common pin 10 Connected, the remaining independent pins are bent along the creases thereon and then vertically inserted on the circuit board group 3, the photosensitive elements are supported on the circuit board group 3, and the normal and circuit boards of the in-line photosensitive chip 12 The angle between the groups 3 is 45 ° (may be 60 °, but not limited thereto), and the two ends of the common pin 10 are respectively inserted into the encapsulation layer 6 of the left and right photosensitive elements, and the anode of each photosensitive element The gold wire on the pin and the cathode pin is connected. The upper surface of the encapsulation layer 6 has a lens structure. The lens structure includes a concave lens 4 in the middle and a convex lens 5 around the concave lens 4. The inner ring of the convex lens 5 is surrounded by the outer ring. 5 and the concave lens 4 has a circular shape and concentric. The concave lens 4 has a diameter substantially equal to the width d of the photosensitive chip 12 and is located directly above the light receiving surface of the photosensitive chip 12.

The present embodiment further provides an in-vehicle solar sensor comprising the above-mentioned photosensitive element, an upper cover 位于 and a base 8 for filtering visible light above the photosensitive element, and the circuit board group 3 of the photosensitive element is fixed by the terminal line 9 On the base 8. A vehicle includes the in-vehicle sunlight sensor in the embodiment.

The sensor of the present invention is a sensor for monitoring the amount of infrared radiation of sunlight in a car. Depending on the amount of radiation, the sensor sends a signal to the vehicle's air conditioning system, which adjusts the output based on the sensor's signal. Considering that sunlight will penetrate the side windows and the front windshield into the interior of the vehicle, the sun sensor should be designed with high sensitivity to low angle light. It can be seen in Fig. 7 that the convex lens 4 can make full use of low-angle light (substantially horizontal incident light) to improve sensitivity.

Considering the blocking effect of the car roof on the light, the sun sensor should not rise with the increase of the horizontal angle of the sun. When the sun is shining vertically, the sensitivity of the sun sensor should be stable. The photosensitive member of the present invention takes this factor into account, when the sunlight is irradiated from a vertical angle, Instruction manual

It can be seen in Fig. 8 that the concave lens 4 can disperse the light incident vertically and diffuse the light of the vertical angle, thereby achieving the smoothness of the sensitivity in the vicinity of the vertical illumination.

As shown in FIG. 10, line A is the horizontal living angle/degree of sunlight and the normalized output relationship when the lens design is used in the present invention, and line B is the horizontal horizontal angle/degree and return of sunlight when the lens design is not used in the prior art. In the output relationship, the horizontal axis represents the horizontal elevation/degree of sunlight, and the vertical axis represents the normalized output. The normalized output is proportional to the sensitivity of the sensor.

When the horizontal angle of the sun is 0 degrees, it indicates that the sunlight is horizontally directed from the front of the car; when the horizontal angle of the sun is 90 degrees, it indicates the vertical illumination of the sun and the roof;

When the horizontal rising angle of the sunlight is 180 degrees, it means that the sunlight is horizontally irradiated from the rear with respect to the automobile; the present invention designs a solar sensor with a lens which is higher in sensitivity when the sunlight is irradiated from a lower angle than the sunlight sensor without the lens.

The sensitivity is stabilized in vertical illumination, and the design with lens is more stable than the design without lens.

Some of the test data in Example 4 below (without the car cover), the sensitivity of the left and right photosensitive elements is attempted:

In Figure 11, S represents the sun, the Z axis is perpendicular to the horizontal direction of the car, the positive X-axis is the right side of the car's direction of travel, and Φ is the angle of the sun, with a range of 0-360 ° (as shown in Figure 12, the Z-axis is exactly The dot in the middle of the figure, Θ is the elevation angle of the sun, and the range is 0-180° (as shown in Figure 13).

In Figure 14, the angle of rotation is 90 °, the elevation angle is from 0 to 180 degrees, the horizontal axis represents the horizontal elevation angle / degree of sunlight, the vertical axis represents the normalized output, the normalized output is proportional to the sensitivity of the sensor, and the line C represents the right The output of the side photosensor, line D represents the output of the left photosensor.

The range of the sensitivity of the photosensitive member in the range of 0. 6~0. 8; Instruction manual

The range of the sensitivity of the photosensitive member in the range of 0. 2^0. 4;

The sensitivity of the photosensitive element in the range of 0. 8~1. 0; the sensitivity of the photosensitive element in the range of O. l. O;

The sensitivity of the sensitivity of the left photosensor is between 120 and 150 degrees; the sensitivity of the sensitivity of the right photosensor is between 30 and 60 degrees.

In Figure 15, the angle of rotation is 45 °, the elevation angle is from 0 to 180 degrees, the horizontal axis represents the horizontal elevation angle / degree of sunlight, the vertical axis represents the normalized output, the normalized output is proportional to the sensitivity of the sensor, and the line C represents the right The output of the side photosensor, line D represents the output of the left photosensor.

The range of the sensitivity of the photosensitive member in the range of 0. 7~0. 9;

The sensitivity of the sensitivity is in the range of Γ0. 2 when the photosensitive element on the left side is at an elevation angle of 180 degrees, and the sensitivity is in the range of 0.2 to 0.4;

The sensitivity of the left photosensitive member is in the range of O. l. O when the elevation angle is 90 degrees, and the sensitivity is in the range of O. l. O when the left photosensitive element is at an elevation angle of 90 degrees;

The sensitivity of the sensitivity of the left photosensor is between 90 and 120 degrees; the sensitivity of the sensitivity of the right photosensor is between 40 and 70 degrees.

In Fig. 16, the rotation angle is 0°, the elevation angle is from 0 to 180 degrees, the horizontal axis represents the horizontal elevation angle/degree of sunlight, the vertical axis represents the normalized output, the normalized output is proportional to the sensitivity of the sensor, and the line C represents the right. The output of the side photosensor, line D represents the output of the left photosensor.

The range of the sensitivity is in the range of 0. 5~0. 8 when the angle is 0. 5~0.

When the left photosensitive element is at an elevation angle of 180 degrees, the sensitivity is in the range of Γ0.2; the right photosensitive element Description

The sensitivity is in the range of 0 to 0.2 when the elevation angle is 180 degrees;

The sensitivity of the photosensitive element on the left side is in the range of 0.8 to 1.0; the sensitivity of the photosensitive element on the left side is 90.degree.

The sensitivity of the sensitivity of the left photosensitive element is between 30 degrees and 60 degrees; the sensitivity of the sensitivity of the right photosensitive element is between 30 degrees and 60 degrees;

In general, the outputs of the left and right photosensitive elements substantially coincide.

In Figure 17, the angle of rotation is -45 °, and the elevation angle is from 0 to 180 degrees. The horizontal axis represents the horizontal elevation/degree of sunlight, the vertical axis represents the normalized output, and the normalized output is proportional to the sensitivity of the sensor. Line C represents The output of the right photosensitive element, line D represents the output of the left photosensitive element.

The sensitivity of the photosensitive element in the range of 0. 7~0. 9; the sensitivity of the photosensitive element in the range of 0. 3 to 0.

The sensitivity of the photosensitive element in the range of 0. 2 is in the range of 0. 2;

The sensitivity of the left photosensitive member is in the range of 0. 8^1. 0; the sensitivity of the left photosensitive member is in the range of O. l. O at an elevation angle of 90 degrees;

The sensitivity of the sensitivity of the left photosensor is between 30 and 60 degrees; the sensitivity of the sensitivity of the right photosensor is between 90 and 120 degrees.

In Fig. 18, the rotation angle is -90°, the elevation angle is from 0 to 180 degrees, the horizontal axis represents the horizontal elevation angle/degree of sunlight, and the vertical axis represents the normalized output. The normalized output is proportional to the sensitivity of the sensor, and the line C represents The output of the right photosensitive element, line D represents the output of the left photosensitive element.

The sensitivity of the photosensitive element in the range of 0. 6^0. 8 in the range of 0. 6^0. 8;

At an elevation angle of 180 degrees, the sensitivity is in the range of 0.6 to 0.8.

When the left photosensitive element is at an elevation angle of 90 degrees, the sensitivity is in the range of O. l.O; the left photosensitive element is in the range of 0.80 at an elevation angle of 90 degrees.

The sensitivity of the sensitivity of the left photosensor is between 30 and 60 degrees; the sensitivity of the sensitivity of the right photosensor is between 120 and 150 degrees.

In view of the above-described embodiments of the present invention, various changes and modifications may be made by those skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and the technical scope thereof must be determined in accordance with the scope of the claims.

Claims

claims

1. A photosensitive element for a vehicle-mounted sunlight sensor, including a photosensitive chip, an anode pin and a cathode pin. The photosensitive chip, anode pin and cathode pin are all packaged in the packaging layer (6), and the anode The pin and the cathode pin are respectively connected to the anode pin (1) and the cathode pin (2), which are characterized in that: the upper surface of the packaging layer (6) has a lens structure, and the lens structure can cause the light to be incident. Refracted and projected onto the photosensitive chip.

2. The photosensitive element for a vehicle-mounted sunlight sensor according to claim 1, characterized in that: the lens structure includes a concave lens (4) in the middle and a convex lens (5) around the concave lens (4).

3. The photosensitive element for a vehicle-mounted sunlight sensor according to claim 2, characterized in that: the convex lens (5) is in the shape of a ring, and the concave lens (4) is filled in the center of the ring-shaped convex lens (5), and the convex lens (5) and the concave lens (4) are circular and concentrically arranged.

4. The photosensitive element for a vehicle-mounted sunlight sensor according to claim 3, characterized in that: the diameter of the concave lens (4) is approximately consistent with the width d of the photosensitive chip, and the central axis of the concave lens (4) is perpendicular to The upper surface of the photosensitive chip.

5. The photosensitive element for a vehicle-mounted sunlight sensor as claimed in claim 1, characterized in that: the lens structure includes a flat lens in the middle and a convex lens surrounding the flat lens.

6. The photosensitive element for a vehicle-mounted sunlight sensor as claimed in claim 5, characterized in that: the convex lens is annular, the flat lens is filled in the center of the annular convex lens, and the flat lens and the convex lens are circular and concentric. set up.

7. The photosensitive element for a vehicle-mounted sunlight sensor according to claim 6, characterized in that: the diameter of the flat lens is approximately consistent with the width d of the photosensitive chip, and the central axis of the flat lens is perpendicular to the upper surface of the photosensitive chip. surface.

8. The photosensitive element for a vehicle-mounted sunlight sensor according to claim 1, characterized in that: the anode pin (1) and the cathode pin (2) are provided with creases, and the anode pin (1) or/and the cathode pin (2 ) claims

Bend it along the crease and then vertically plug it into the circuit board set (3). The angle between the normal line of the photosensitive chip and the circuit board set (3) is (T180°).

9. The photosensitive element for a vehicle-mounted sunlight sensor according to claim 1, characterized in that: there are two photosensitive elements, which are connected through a common pin (10), and the remaining independent pins are plugged into the circuit board group (3 ), the angle between the normal line of the photosensitive chip and the circuit board set (3) is 3(Γ150°.

10. A vehicle-mounted sunlight sensor provided with the photosensitive element according to any one of claims 1 to 9, characterized in that: it includes a photosensitive element, an upper cover (7) located above the photosensitive element for filtering visible light, and a base ( 8), the circuit board group (3) of the photosensitive element is fixed on the base (8) through the terminal wire (9).

11. A vehicle, characterized by: including the vehicle-mounted sunlight sensor as claimed in claim 10.