Variable-focus light-emitting device

Abstract

The utility model relates to the technical field of semiconductor luminescence, and discloses a variable-focus luminescent device. The variable-focus light-emitting device comprises a support, a light-emitting chip, a cavity structure and a lens. The light-emitting chip is arranged on the support. The light-emitting chip at least comprises a VCSEL light-emitting chip and an LED light-emitting chip. The lens is arranged on the support and covers the light-emitting chip. The cavity structure is arranged between the support and the lens. The lens includes a lower optical interface and an upper optical interface. The lower optical interface includes at least a first optical interface and a second optical interface. The first optical interface and the second optical interface correspond to the VCSEL light-emitting chip and the LED light-emitting chip respectively and are used for conducting optical shaping on light emitted by the VCSEL light-emitting chip and light emitted by the LED light-emitting chip respectively. According to the light-emitting device, the VCSEL light-emitting chip and the LED light-emitting chip are integrated at the same time, light supplementing angles with different focal lengths exist on one device, the zooming function is further achieved, the space size of an optical module is greatly reduced, and the complexity of a whole optical system is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of semiconductor light emitting, and in particular relates to a light emitting device with variable focus. Background Art

[0002] For the scene of multi-focal length fill light at long and short distances, the current solution on the market is: VCSEL small-angle light-emitting devices are used for long-distance fill light, and LED large-angle light-emitting devices are used for short-distance fill light. Existing VCSEL light-emitting devices and LED light-emitting devices are usually packaged separately. Figure 4 A light-emitting chip 2 is encapsulated between the bracket 1 and the lens 3. This chip can be a VCSEL or LED. To achieve simultaneous long-range or short-range fill light, or to switch between them, the optical module must integrate multiple light-emitting devices (VCSELs and LEDs), making the entire system complex and bulky.

[0003] Based on the above, the problem to be solved at present is to provide a light emitting device with small size, simple system and variable focus fill light. Utility Model Content

[0004] The purpose of the utility model is to provide a light-emitting device with variable focus, aiming to solve the problems of the prior art that the variable focus fill light system is complex, large in size and has poor fill light effect.

[0005] The utility model is implemented as follows: a variable-focus light emitting device, characterized in that it includes:

[0006] Bracket;

[0007] A light-emitting chip is provided on the bracket; the light-emitting chip includes at least a VCSEL light-emitting chip and an LED light-emitting chip;

[0008] a lens, which is disposed on the bracket and covers the light-emitting chip;

[0009] a cavity structure, which is provided between the bracket and the lens, and the light-emitting chip is provided in the cavity structure;

[0010] The lens includes a lower optical interface for inputting light and an upper optical interface for outputting light; the lower optical interface includes at least a first optical interface and a second optical interface, the first optical interface and the second optical interface respectively corresponding to the VCSEL light-emitting chip and the LED light-emitting chip, and are used to optically shape the light emitted by the VCSEL light-emitting chip and the LED light-emitting chip respectively.

[0011] Furthermore, the first optical interface is configured as a curved surface that is convex toward a side close to the cavity structure, and the second optical interface is configured as a curved surface that is concave toward a side away from the cavity structure.

[0012] Furthermore, the first optical interface and the second optical interface are both configured as curved surfaces convex toward the side close to the cavity structure, or the first optical interface and the second optical interface are both configured as curved surfaces concave toward the side away from the cavity structure, and the first optical interface and the second optical interface are connected by a smooth curved surface.

[0013] Furthermore, the light-emitting chip includes the VCSEL light-emitting chip arranged in the middle and LED light-emitting chips arranged around the VCSEL light-emitting chip; the lower optical interface includes the first optical interface in the middle and the second optical interface arranged around the first optical interface.

[0014] Furthermore, the upper optical interface is set to be a plane or a convex surface.

[0015] Furthermore, after the light emitted by the VCSEL light-emitting chip passes through the first optical interface and the upper optical interface, the divergence angle thereof is less than 15°.

[0016] Furthermore, after the light emitted by the LED light-emitting chip passes through the second optical interface and the upper optical interface, the divergence angle thereof is 50° to 120°.

[0017] Compared with the prior art, the light-emitting device with variable focus provided by the present invention has the following beneficial effects:

[0018] The light-emitting device of this invention integrates both a VCSEL chip 21 and an LED chip 22. This means that the VCSEL chip 21 and the LED chip 22 share a single lens, significantly reducing the size of the optical module and the complexity of the entire optical system. This device utilizes the different divergence angles of the VCSEL chip 21 and the LED chip 22 to achieve fill light angles of varying focal lengths within a single device, further enabling a zoom function.

[0019] In order to better perform optical shaping on the VCSEL light-emitting chip 21 and the LED light-emitting chip 22, the lens 3 is configured with optical functional areas, that is, the first optical interface 321 and the second optical interface 322 are optically designed for the VCSEL light-emitting chip 21 and the LED light-emitting chip 22 respectively, to meet the fill light requirements of different focal lengths at far and near, and further ensure high-quality fill light of the light-emitting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic cross-sectional view of the light-emitting device with variable focus provided by the present invention;

[0021] Figure 2 This utility model provides Figure 1 Light path diagram of a light-emitting device with variable focus;

[0022] Figure 3 This is a schematic cross-sectional view of another variable-focus light-emitting device provided by the present invention;

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of a light-emitting device provided by the prior art;

[0024] In the figure: 1- bracket; 2- light-emitting chip; 21- VCSEL light-emitting chip; 22- LED light-emitting chip; 3- lens; 31- upper optical interface; 32- lower optical interface; 321- first optical interface; 322- second optical interface; 4- cavity structure. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] The implementation of the present invention is described in detail below with reference to specific embodiments.

[0027] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] Reference Figure 1-3 The figure shows a preferred embodiment of the present invention.

[0029] The variable focus light emitting device includes a bracket 1, a light emitting chip 2, a cavity structure 4 and a lens 3. The light emitting chip 2 is arranged on the bracket 1. Figure 1. The lens 3 is arranged on the bracket 1 and covers the light-emitting chip 2, and is used to encapsulate the light-emitting chip 2 and optically adjust the light emitted by the light-emitting chip 2. The cavity structure 4 is arranged between the bracket 1 and the lens 3. The cavity structure 4 is used to accommodate the light-emitting chip 2 and for light propagation. The light-emitting chip 2 is arranged on the bracket 1 and in the cavity structure 4. The light-emitting chip 2 includes at least a VCSEL light-emitting chip 21 and an LED light-emitting chip 22. The light-emitting device of the present invention integrates the VCSEL light-emitting chip 21 and the LED light-emitting chip 22 at the same time, that is, the VCSEL light-emitting chip 21 and the LED light-emitting chip 22 share a lens 3. By utilizing the difference in the divergence angles of the two, fill light angles with different focal lengths exist on one device, thereby realizing the zoom function and further realizing the miniaturization and simplification of the light-emitting device.

[0030] Lens 3 includes a lower optical interface 32 for input light and an upper optical interface 31 for output light. Lower optical interface 32 comprises at least a first optical interface 321 and a second optical interface 322. The first and second optical interfaces 321, 322 correspond to the VCSEL and LED chips 21, 22, respectively, and are used to optically shape the light emitted by them. To accommodate different types of light-emitting chips 2, lens 3 is divided into functional areas to meet the needs of fill light for both near and far focal lengths, further ensuring the high quality of the light-emitting device.

[0031] In preferred solution 1, the first optical interface 321 is configured as a convex surface toward the side close to the cavity structure 4. The second optical interface 322 is configured as a concave surface toward the side away from the cavity structure 4. The upper optical interface 31 is configured as a flat surface or a convex surface, preferably a convex surface.

[0032] Furthermore, the light-emitting chip 2 includes a VCSEL light-emitting chip 21 located in the center and LED light-emitting chips 22 located around the VCSEL light-emitting chip 21. The lower optical interface 32 includes a first optical interface 321 located in the center, corresponding to the VCSEL light-emitting chip 21, and a second optical interface 322 located around the first optical interface 321, corresponding to the LED light-emitting chips 22. Preferably, one VCSEL light-emitting chip 21 is located in the center, and two LED light-emitting chips 22 are symmetrically distributed on either side of the VCSEL light-emitting chip 21. The center portion (first optical interface 321) of the lower optical interface 32 is a convex surface, while the sides or sides (second optical interface 322) are concave surfaces.

[0033] The optical functional area in the middle of the lens 3 collects light from the VCSEL light emitting chip 21. That is, the light emitted by the VCSEL light emitting chip 21 is emitted through the first optical interface 321 and the upper optical interface 31 to achieve a small-angle, long-distance emission angle of less than 15°. Figure 2The optical functional areas around the lens 3 have a divergent effect on the LED light-emitting chip 22, that is, the light emitted by the LED light-emitting chip 22 is acted upon by the second optical interface 322 and the upper optical interface 31 to realize a wide-angle, close-range output light with a divergence angle of 50° to 120°. According to the needs of the application scenario, the surface shape and curvature of the upper optical interface 31 and the lower optical interface 32 can be appropriately adjusted to achieve the preset divergence angle and fill light distance, thereby ensuring a high-quality fill light effect. VCSEL small-angle light-emitting devices are used for long-distance fill light, and LED large-angle light-emitting devices are used for close distance.

[0034] In another preferred embodiment, the first optical interface 321 and the second optical interface 322 are both configured as curved surfaces that are convex toward the side close to the cavity structure 4; or the first optical interface 321 and the second optical interface 322 are both configured as curved surfaces that are concave toward the side away from the cavity structure 4, and the first optical interface 321 and the second optical interface 322 are connected by a smooth curved surface. The first optical interface 321 and the second optical interface 322 can be configured to share a convex or concave free-form surface in the shape of a semicircle, semi-ellipse, etc., with reference to Figure 3 .

[0035] This does not limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A light-emitting device with variable focus, characterized in that: include: Bracket (1); A light-emitting chip (2) is provided on the bracket (1); the light-emitting chip (2) comprises at least a VCSEL light-emitting chip (21) and an LED light-emitting chip (22); a lens (3) disposed on the bracket (1) and covering the light-emitting chip (2); a cavity structure (4) disposed between the bracket (1) and the lens (3), wherein the light-emitting chip (2) is disposed within the cavity structure (4); The lens (3) comprises a lower optical interface (32) for inputting light and an upper optical interface (31) for outputting light; the lower optical interface (32) comprises at least a first optical interface (321) and a second optical interface (322), the first optical interface (321) and the second optical interface (322) corresponding to the VCSEL light-emitting chip (21) and the LED light-emitting chip (22), respectively, and being used to optically shape the light emitted by the VCSEL light-emitting chip (21) and the LED light-emitting chip (22), respectively.

2. The variable-focus light-emitting device according to claim 1, characterized in that: The first optical interface (321) is configured as a curved surface that is convex toward a side close to the cavity structure (4), and the second optical interface (322) is configured as a curved surface that is concave toward a side away from the cavity structure (4).

3. The variable-focus light emitting device according to claim 1, characterized in that: The first optical interface (321) and the second optical interface (322) are both configured as curved surfaces that are convex toward a side close to the cavity structure (4), or the first optical interface (321) and the second optical interface (322) are both configured as curved surfaces that are concave toward a side away from the cavity structure (4), and the first optical interface (321) and the second optical interface (322) are connected by a smooth curved surface.

4. The variable-focus light-emitting device according to any one of claims 1 to 3, characterized in that: The light-emitting chip (2) comprises the VCSEL light-emitting chip (21) arranged in the middle and LED light-emitting chips (22) arranged around the VCSEL light-emitting chip (21).

5. The variable-focus light emitting device according to claim 1, characterized in that: The upper optical interface (31) is configured as a plane or a convex surface.

6. The variable-focus light emitting device according to claim 1, characterized in that: After the light emitted by the VCSEL light-emitting chip (21) passes through the first optical interface (321) and the upper optical interface (31), its divergence angle is less than 15°.

7. The variable-focus light emitting device according to claim 1, characterized in that: After the light emitted by the LED light-emitting chip (22) passes through the second optical interface (322) and the upper optical interface (31), the divergence angle thereof is 50° to 120°.

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