CN214948349U

CN214948349U - Light source device

Info

Publication number: CN214948349U
Application number: CN202021667490.8U
Authority: CN
Inventors: 吴家政; 曹侯焱; 王建添; 杨淑桦; 苏渝宏
Original assignee: Lite On Opto Technology Changzhou Co Ltd; Lite On Technology Corp
Current assignee: Lite On Opto Technology Changzhou Co Ltd; Lite On Technology Corp
Priority date: 2019-08-27
Filing date: 2020-08-11
Publication date: 2021-11-30
Anticipated expiration: 2030-08-11
Also published as: CN212571695U

Abstract

The utility model discloses a light source device, optical element include a printing opacity piece and at least one detection return circuit. The detection loop is transparent and formed on the light-transmitting piece and comprises two contacts. The two contacts of at least one detection loop are respectively connected with the connecting pads of the conductive unit, and further electrically coupled with the second lower electrode layer of the lower electrode layer. Therefore, the resistance value of the detection loop is measured through the second lower electrode layer, and whether the light-transmitting element is damaged or not is further known.

Description

Light source device

Technical Field

The present invention relates to a light source device, and more particularly to a light source device with a detection circuit and an optical element thereof.

Background

The conventional light source device cannot know whether the light-transmitting member is damaged. Therefore, the inventor thinks that the above-mentioned defects can be improved, and the inventor is careful to study and cooperate with the application of scientific principles, and finally proposes a reasonable design and the utility model which can effectively improve the above-mentioned defects.

SUMMERY OF THE UTILITY MODEL

Embodiments of the present invention provide a light source device, which can effectively improve the defects possibly generated by the existing light source device.

The embodiment of the utility model discloses light source device, light source device includes: a substrate including a first plate surface and a second plate surface on opposite sides; the upper electrode layer and the lower electrode layer are respectively arranged on the first plate surface and the second plate surface of the substrate, and the lower electrode layer comprises a first lower electrode layer and a second lower electrode layer; a light emitting unit mounted on the upper electrode layer and electrically coupled to the first lower electrode layer through the upper electrode layer; the enclosing wall is arranged on the first plate surface and surrounds the outer side of the light-emitting unit; a conductive unit disposed on the wall and electrically coupled to the second bottom electrode layer; wherein the conductive unit comprises a plurality of connecting pads; and an optical element disposed on the wall and covering the light emitting unit, the optical element including: the detection circuit is transparent and is formed on the light-transmitting piece and comprises two contacts; at least two of the contacts of the detection loop are respectively connected to the pads, and are further electrically coupled to the second bottom electrode layer.

Preferably, the optical element further includes two metal layers respectively formed on the two contacts, wherein the two contacts of the at least one detection circuit are respectively connected to the pads through the two metal layers, and further electrically coupled to the second bottom electrode layer.

Preferably, the light-transmitting member is provided with a central block and a peripheral block surrounding the central block, the light-emitting unit is located right below the central block, and the peripheral block is arranged above the enclosing wall; wherein, two said contact and two said metal layers of at least one said detection loop are all formed on said peripheral block.

Preferably, at least one of the detection circuits is transparent and includes a detection wire connecting two of the contacts, and the detection wire is formed in at least one of the central block and the peripheral block.

Preferably, the enclosing wall is in a ring-shaped step shape and comprises: an upper step surface away from the substrate; the upper step surface is connected with the inner edge of the upper step surface; the lower step surface is positioned on the inner side of the upper step surface, and the distance between the lower step surface and the first plate surface is smaller than the distance between the upper step surface and the first plate surface; the lower step surface is connected to the inner edge of the lower step surface and is far away from the upper step surface, and the lower step surface surrounds the outer side of the light-emitting unit; the plurality of pads of the conductive unit include two first pads and two second pads, the plurality of first pads are disposed on the lower step surface, and the plurality of second pads are disposed on at least one of the upper step surface and the upper step surface; the two contacts of at least one of the detection circuits are connected to the two first pads or the two second pads through the two metal layers, respectively.

Preferably, the light-transmitting member includes an outer surface and an inner surface on opposite sides, and the inner surface faces the light-emitting unit; wherein, at least one of the detection loops is formed on the inner surface, and two of the contacts of at least one of the detection loops are respectively connected to only two of the first pads through two of the metal layers.

Preferably, the light-transmitting member includes an outer surface and an inner surface on opposite sides, and the inner surface faces the light-emitting unit; wherein, at least one of the detection loops is formed on the outer surface, and two of the contacts of at least one of the detection loops are respectively connected to only two of the second pads through two of the metal layers.

Preferably, the light source device includes two conductive adhesives, and the two conductive adhesives respectively electrically couple two of the pads to the two metal layers.

Preferably, the light source device includes two conductive adhesives respectively connected to the two pads, and each conductive adhesive is connected to one of the contacts and the metal layer thereon; in each contact and the metal layer on the contact, the area of the contact connected to the corresponding conductive adhesive is smaller than the area of the metal layer connected to the corresponding conductive adhesive.

Preferably, the light source device includes two conductive adhesives respectively connected to the two pads, and the two conductive adhesives are also respectively connected to the two metal layers but do not contact any of the contacts.

The embodiment of the utility model provides a also disclose a light source device's optical element, optical element includes: a light transmissive member; at least one detection loop which is transparent and is formed on the light-transmitting piece and comprises two contacts; and two metal layers formed on the two contacts, respectively.

To sum up, the embodiment of the present invention provides a light source device and an optical element thereof, which are formed with a conductive unit on an enclosure, so that a detection circuit on a light-transmitting element can be electrically coupled to a second bottom electrode layer through the conductive unit, thereby facilitating the passing through of the resistance of the detection circuit measured by the second bottom electrode layer, and further knowing whether the light-transmitting element is damaged.

For a further understanding of the features and technical content of the present invention, reference should be made to the following detailed description and accompanying drawings, which are only intended to illustrate the present invention, and not to limit the scope of the present invention.

Drawings

Fig. 1 is a schematic perspective view of a light source device according to a first embodiment of the present invention.

Fig. 2 is a perspective view of fig. 1 from another angle.

Fig. 3 is an exploded view of fig. 1 (without the adhesive layer).

Fig. 4 is a schematic top view of fig. 3 (omitting the light-transmitting member and the adhesive layer).

Fig. 5 is a schematic cross-sectional view of fig. 4 along the sectional line V-V.

Fig. 6 is a schematic cross-sectional view of fig. 1 along the sectional line VI-VI.

FIG. 7 is a schematic cross-sectional view of FIG. 1 taken along section line VIII.

Fig. 8 is a schematic perspective view of a light source device according to a second embodiment of the present invention.

Fig. 9 is an exploded view of fig. 8 (omitting the conductive adhesive and the adhesive layer).

Fig. 10 is a schematic cross-sectional view of fig. 8 along the cross-sectional line X-X.

Fig. 11 is a schematic perspective view of a light source device according to a third embodiment of the present invention.

Fig. 12 is an exploded view of fig. 11 (omitting the conductive adhesive and the adhesive layer).

Fig. 13 is a schematic perspective view of a light source device according to a fourth embodiment of the present invention.

Fig. 14 is an exploded view of fig. 13 (omitting the conductive adhesive and the adhesive layer).

Fig. 15 is a schematic perspective view of a light source device according to a fifth embodiment of the present invention.

Fig. 16 is an exploded view of fig. 15 (omitting the conductive paste).

Detailed Description

Please refer to fig. 1 to 16, which are exemplary embodiments of the present invention, and it should be noted that the related numbers and shapes mentioned in the accompanying drawings are only used for describing the embodiments of the present invention in order to understand the contents of the present invention, but not for limiting the scope of the present invention.

As shown in fig. 1 to 3, the present embodiment discloses a light source device 100, which includes a substrate 1, an upper electrode layer 2 and a lower electrode layer 3 disposed on opposite sides of the substrate 1, a plurality of conductive vias 4 embedded in the substrate 1, a light emitting unit 5 disposed on the upper electrode layer 2, a wall 6 disposed on the substrate 1 and surrounding the light emitting unit 5, a conductive unit 7 disposed on the wall 6, a light-transmitting member 8 disposed on the wall 6 and covering the light emitting unit 5, two detection loops 9 formed on the light-transmitting member 8, an adhesive layer G (as shown in fig. 7) connecting and fixing the light-transmitting member 8 and the wall 6, and a plurality of metal layers 10 formed on at least one of the detection loops 9.

Although the light source device 100 includes the above-mentioned components, in other embodiments not shown in the present invention, the components included in the light source device 100 may be adjusted according to design requirements (for example, the metal layers 10 and/or the adhesive layers G are omitted). The light-transmitting element 8, the detection circuit 9 formed thereon, and the metal layer 10 are defined as an optical element P in this embodiment, and the optical element P is disposed on the surrounding wall 6 and covers the light-emitting unit 5. Furthermore, the optical element P can be used alone (e.g., sold) or with other components, and the invention is not limited thereto. The respective component configurations of the light source device 100 and the connection relationship thereof will be described below.

As shown in fig. 2 to 4, the substrate 1 is substantially square (e.g., rectangular or square) in the present embodiment. The substrate 1 of the present embodiment includes a first board 11 and a second board 12 located on opposite sides, and the substrate 1 is illustrated as a ceramic substrate, which has a better heat dissipation effect, but the present invention is not limited thereto.

The upper electrode layer 2 is disposed on the first plate surface 11 of the substrate 1, and the upper electrode layer 2 includes two upper electrode pads 21 for die bonding and wire bonding of the light emitting unit 5. The lower electrode layer 3 is disposed on the second plate surface 12 of the substrate 1, and the lower electrode layer 3 includes a first lower electrode layer 31 and a second lower electrode layer 32 disposed in a coplanar manner. The first bottom electrode layer 31 includes two first bottom electrode pads 311, the second bottom electrode layer 32 includes two second bottom electrode pads 321, the two first bottom electrode pads 311 of the first bottom electrode layer 31 are electrically coupled to the two top electrode pads 21 of the top electrode layer 2 through a plurality of conductive vias 4, respectively, and the two second bottom electrode pads 321 of the second bottom electrode layer 32 are electrically coupled to the conductive unit 7.

As shown in fig. 2 to fig. 4, the light Emitting unit 5 is illustrated in this embodiment by a Vertical-Cavity Surface-Emitting Laser (VCSEL), but the invention is not limited thereto. The light emitting unit 5 is mounted on (substantially the center of) the upper electrode layer 2 to be electrically coupled to the first lower electrode layer 31 through the upper electrode layer 2. In the present embodiment, the light emitting unit 5 is fixed on one of the upper electrode pads 21 of the upper electrode layer 2 and wire-bonded to the other upper electrode pad 21, so that the light emitting unit 5 is electrically coupled to the first lower electrode layer 31 through the upper electrode pad 21 and the plurality of conductive vias 4 connected thereto.

As shown in fig. 3 and 4, the enclosing wall 6 is disposed on the first plate surface 11 of the substrate 1 and surrounds the light emitting unit 5. The outer edge of the surrounding wall 6 is aligned with the outer edge of the substrate 1, and the outer periphery of the upper electrode layer 2 is preferably embedded in the surrounding wall 6, so as to increase the bonding force between the substrate and the surrounding wall. Wherein, the inside position of enclosure 6 is annular echelonment to enclosure 6 of this embodiment chooses for use ceramic material, nevertheless the utility model discloses not limited to this. For example, in other embodiments not shown in the present invention, the enclosing wall 6 and the substrate 1 may be a one-piece member integrally formed.

Further, the enclosing wall 6 sequentially includes an upper step surface 61, an upper step surface 62 connected to an inner edge of the upper step surface 61, a lower step surface 63 located inside the upper step surface 62, and a lower step surface 64 connected to an inner edge of the lower step surface 63 and far away from the upper step surface 61 from the outside to the inside.

The upper step surface 61 is in a square ring shape (e.g., a rectangular ring shape or a square ring shape) and is far away from the substrate 1, and the upper step surface 61 is the top surface of the enclosing wall 6 in this embodiment and is preferably parallel to the first plate surface 11 of the substrate 1. The upper step surface 62 is in a square ring shape and is vertically connected to the inner edge of the upper step surface 61. The lower step surface 63 is in a square ring shape and is connected to the inner edge of the upper step surface 62, and the lower step surface 63 is preferably parallel to the upper step surface 61, and a distance between the lower step surface 63 and the first plate surface 11 is smaller than a distance between the upper step surface 61 and the first plate surface 11. The lower step surface 64 is in a square ring shape, the lower step surface 63 is vertically connected to the inner edge of the lower step surface 63, and the lower step surface 64 and the first plate surface 11 of the substrate 1 surround to form an accommodating groove S. Wherein, the light-emitting unit 5 is located in the accommodating groove S; that is, the lower step surface 64 surrounds the outside of the light emitting unit 5.

More specifically, the lower step surface 63 in this embodiment includes two U-shaped regions 631 having inner edges facing each other, two functional regions 632 located between the two U-shaped regions 631, and a plurality of blocking grooves 633. Two outer corners of each U-shaped region 631 are respectively formed with a receiving groove 6311 for receiving the adhesive layer G, and each receiving groove 6311 is substantially L-shaped in the present embodiment. The two functional regions 632 are separated from the two U-shaped regions 631 by a plurality of barrier grooves 633; that is, each functional region 632 is separated from any adjacent U-shaped region 631 by one of the blocking grooves 633, so that the functional region 632 can avoid touching the adhesive layer G. Besides avoiding touching the adhesive layer G, the blocking groove 633 can also serve as an air escape channel.

As shown in fig. 4 to 6, the conductive unit 7 is disposed on the fence 6 and electrically coupled to the second bottom electrode layer 32. In the embodiment, the conductive unit 7 includes a plurality of first pads 71, a plurality of second pads 72 corresponding to the plurality of first pads 71, a plurality of connecting lines 73 respectively connecting the plurality of first pads 71 to the plurality of second pads 72, two transmission lines 74 respectively connecting the plurality of first pads 71, and two conductive pillars 75 respectively connected to the two transmission lines 74.

The first pads 71 and the second pads 72 are disposed on the periphery 6, and a first height position of the first pads 71 on the periphery 6 is different from (e.g., lower than) a second height position of the second pads 72 on the periphery 6. In this embodiment, the first pads 71 are disposed on the lower step surface 63 of the surrounding wall 6, and the second pads 72 are disposed on at least one of the upper step surface 62 and the upper step surface 61.

Further, the first pads 71 are disposed on the two functional regions 632 of the lower step surface 63, the second pads 72 are disposed on the upper step surface 62 (and the upper step surface 61), and the positions of the second pads 72 are adjacent to the positions of the first pads 71, respectively. The connecting wires 73 are embedded in the enclosing wall 6, and two ends of each connecting wire 73 are respectively connected to one first pad 71 and the adjacent second pad 72, so that the first pads 71 (which can be electrically coupled to the second pads 72 through the connecting wires 73) are respectively coupled to the second pads 72.

Furthermore, the two transmission lines 74 are embedded in the enclosing wall 6, and most of the transmission lines 74 are located below one U-shaped region 631 and two adjacent blocking grooves 633 in this embodiment, and two ends of each transmission line 74 are respectively connected to two first pads 71 disposed on different functional regions 632. In another aspect, a third height position of each of the transmission lines 74 in the surrounding wall 6 is lower than the first height position of the first pads 71 on the surrounding wall 6.

Parts of the two transmission lines 74 are located above the two second lower electrode pads 321 of the second lower electrode layer 32, respectively. The two conductive pillars 75 are embedded in the surrounding wall 6 and the substrate 1, one ends of the two conductive pillars 75 are respectively connected to the two transmission lines 74, and the other ends of the two conductive pillars 75 are respectively connected to the two second lower electrode pads 321 of the second lower electrode layer 32, so that the two transmission lines 74 are respectively electrically coupled to the two second lower electrode pads 321 of the second lower electrode layer 32.

It should be noted that, although the conductive unit 7 is described as including the above components in the present embodiment, the conductive unit 7 may be adjusted and changed according to design requirements. For example, in other embodiments not shown in the present invention, the conductive unit 7 may not have any second pads 72 and a plurality of connecting wires 73 formed thereon, or the conductive unit 7 may only have a plurality of first pads 71 on one functional region 632.

As shown in fig. 3, 6, and 7, the light-transmitting material 8 is disposed on the lower step surface 63 of the enclosing wall 6 and spaced apart from the upper step surface 62 (i.e., the light-transmitting material 8 does not contact the upper step surface 62). In the present embodiment, the light-transmitting member 8 is provided with a central block 81 and a peripheral block 82 surrounding the central block 81, the light-emitting unit 5 is located right below the central block 81, and the peripheral block 82 is disposed above the enclosing wall 6. Furthermore, the light-transmitting member 8 includes an outer surface 83 and an inner surface 84 on opposite sides, the inner surface 84 faces the light-emitting unit 5, and the outer surface 83 of the light-transmitting member 8 is lower than the upper surface 61 of the enclosing wall 6, but the present invention is not limited thereto. For example, in other embodiments not shown in the present invention, the outer surface 83 of the light-transmitting member 8 may protrude from the upper step surface 61 of the enclosing wall 6.

In more detail, the light-transmitting member 8 in this embodiment is a transparent glass plate and a light-diffusing polymer (light-diffusing polymer) M disposed on the transparent glass plate, and the light-diffusing polymer M is located on the inner surface 84 of the central block 81 and faces (or covers) the light-emitting unit 5. Furthermore, each receiving groove 6311 of the surrounding wall 6 can be used to receive a portion of the adhesive layer G, and the remaining portion of the adhesive layer G overflows the receiving groove 6311, so that the inner surface 84 of the peripheral block 82 of the light-transmitting member 8 is fixed to the lower surface 63 of the surrounding wall 6 by the adhesive layer G overflowing the receiving groove 6311.

As shown in fig. 3, fig. 6, and fig. 7, the two detection circuits 9 are formed on the light-transmitting member 8, and each detection circuit 9 is formed on an inner surface 84 of the light-transmitting member 8 and located on a peripheral block 82 of the light-transmitting member 8 in this embodiment. Each detection circuit 9 is preferably transparent (e.g., transparent conductive film, ITO), and includes two contacts 91 and a detection wire 92 connecting the two contacts 91. Two contacts 91 of each detection circuit 9 are disposed adjacently on one side of the light-transmitting member 8 and are disposed in pairs, and the detection wires 92 are disposed annularly along the other three sides of the light-transmitting member 8 to connect the two contacts 91. The two contacts 91 of the other detection circuit 9 are disposed in pairs corresponding to the two contacts 91 (two pairs of contacts 91 are disposed on opposite sides), and the detection wires 92 are also disposed along the other three sides of the light-transmitting member 8 in a ring shape to connect the two contacts 91. It should be noted that each detection line 92, besides being arranged in a ring shape, also surrounds at least one contact 91 of another detection circuit 9. However, in other embodiments not shown in the present invention, if the detection circuit 9 is formed on the peripheral block 82 of the light-transmissive element 8, the detection circuit 9 may also be opaque.

Two metal layers 10 are respectively formed on the two contacts 91 of each detection loop 9; that is, a plurality of the contacts 91 and the corresponding metal layers 10 are formed on the peripheral block 82, and the contacts 91 of the two detection circuits 9 are respectively connected to the first pads 71 of the conductive unit 7 through the metal layers 10 (only), so that each detection circuit 9 is electrically coupled to the second bottom electrode layer 32 through the metal layers 10 and the conductive unit 7. The two contacts 91 of each detection loop 9 are respectively connected to the two first pads 71 connected to different transmission lines 74 through the two corresponding metal layers 10, so that the two contacts 91 of each detection loop 9 can be electrically coupled to the two second lower electrode pads 321, respectively.

It should be noted that the outer surface of the metal layer 10 is preferably flat, and the specific type of the metal layer 10 can be adjusted and varied according to design requirements, for example: the metal layer 10 may be a silver layer, an aluminum layer, a molybdenum layer, a copper layer, a titanium layer, a nickel layer, a titanium alloy layer, or a semiconductor layer, which is not limited herein. Furthermore, the energy band difference between the hetero-junction between the metal layer 10 and the corresponding contact 91 can be reduced by various heating methods (such as annealing, plasma, or laser) to enhance the connection strength between the two.

In addition, the light source device 100 may also use a component in which the detection circuit 9 is formed on the outer surface 83 of the light-transmitting member 8; that is, the light source device 100 can be applied to the component of the light-transmitting member 8 having the detection circuit 9 formed on the inner surface 84 thereof or the component of the light-transmitting member 8 having the detection circuit 9 formed on the outer surface 83 thereof by the arrangement of the conductive unit 7. Accordingly, the two contacts 91 of the detection circuit 9 can be connected to the first pads 71 or the second pads 72 through the corresponding two metal layers 10, respectively.

Further, as shown in fig. 8 to 10, the two detection circuits 9 are formed on the outer surface 83 of the light-transmitting element 8, and the positions of the two detection circuits 9 and the outer surface 83 of the light-transmitting element 8 are lower than the upper surface 61 of the enclosing wall 6, so that the plurality of contacts 91 of the two detection circuits 9 can be connected to the plurality of second pads 72 through the plurality of metal layers 10 and the conductive paste C. The connection between any one of the contacts 91 of the detection circuit 9 and the corresponding second pad 72 may be: fill the gap between terraced surface 62 on light-transmitting member 8 and enclosure 6 with conducting resin C to through above-mentioned contact 91 of conducting resin C electric connection, corresponding metal level 10 and second pad 72, nevertheless the utility model discloses do not use this as the limit. It should be noted that the two detection circuits 9 are formed on the peripheral block 82 of the light-transmitting member 8 while avoiding the central block 81 of the light-transmitting member 8, and the two contacts 91 of each detection circuit 9 are disposed adjacently on one side of the light-transmitting member 8 and are arranged in pairs, and the two contacts 91 of the other detection circuit 9 are arranged in pairs corresponding to the two contacts 91 (two pairs of contacts 91 are disposed on opposite sides). The two detection circuits 9 include an inner detection circuit 9a and an outer detection circuit 9b, the detection wire 92 of the inner detection circuit 9a is disposed around the outer frame of the central block 81, the outer detection circuit 9b is disposed at the periphery of the inner detection circuit 9a, and the detection wire 92 of the outer detection circuit 9b is disposed in a ring shape along three sides of the light-transmitting member 8. In other words, the area surrounded by the detection wire 92 of the inner detection circuit 9a is substantially square, and the area surrounded by the outer detection circuit 9b is substantially U-shaped.

It should be noted that the shapes and positions of the two contacts 91 and the detection wires 92 of each detection circuit 9 can also be adjusted according to design requirements. For example, as shown in fig. 11 and 12, the number of the detection circuits 9 formed on the light-transmitting element 8 may be at least one, and the detection wires 92 of the detection circuits 9 are formed in a ring shape of two to three circles on the peripheral area 82 of the light-transmitting element 8 while avoiding the central area 81, and the two contacts 91 of any one detection circuit 9 are respectively connected (only) to two second pads 72 (or two adjacent first pads 71) disposed on different functional areas 632 through the corresponding two metal layers 10.

In addition, although two detection circuits 9 are illustrated in the present embodiment, the present invention is not limited thereto. For example, as shown in fig. 13 and 14, the number of the detection circuits 9 formed in the light-transmissive member 8 may be at least one, and the detection wires 92 of the detection circuits 9 may be formed in the central block 81 and the peripheral block 82 of the light-transmissive member 8, and the two contacts 91 of the detection circuits 9 are respectively connected to (only) two second pads 72 disposed on the same functional region 632 through the corresponding two metal layers 10. In another aspect, when the outer surface 83 of the light-transmitting member 8 is divided into a plurality of squares arranged in a matrix, the detecting circuit 9 may be substantially all the squares passing through the outer surface 83, but the invention is not limited thereto.

As shown in fig. 15 and 16, the number of the first pads 71 and the number of the second pads 72 of the light source device 100 may be two, and the number of the detection circuits 9 formed on the light transmissive element 8 may be at least one, and the two conductive adhesives C electrically couple two pads (e.g., two second pads 72) of the plurality of pads (e.g., two first pads 71 and two second pads 72) to two metal layers 10, respectively. That is, two conductive pastes C are respectively connected to two of the pads (e.g., the second pad 72), and each conductive paste C is connected to one of the contacts 91 and the metal layer 10 thereon.

In more detail, in each of the contacts (e.g., the second pads 72) and the metal layer 10 thereon, the area of the contact (e.g., the second pad 72) connected to the corresponding conductive paste C is smaller than the area of the metal layer 10 connected to the corresponding conductive paste C. In the embodiment, the two conductive adhesives C are respectively connected to the two metal layers 10, but do not contact any of the contacts 91, but the invention is not limited thereto.

[ technical effects of the embodiments of the present invention ]

To sum up, the embodiment of the present invention provides a light source device, which is formed with a conductive unit on the wall, so that the detecting circuit on the light-transmitting element can be electrically coupled to the second bottom electrode layer through the corresponding conductive unit (and/or the metal layer), thereby facilitating the passing through of the resistance of the detecting circuit measured by the second bottom electrode layer, and further learning whether the light-transmitting element is damaged.

The embodiment of the utility model provides a disclosed light source device and optical element thereof is any between contact and conducting resin, through be formed with on the contact the metal level is as the buffering to improve effectively because of detect the return circuit with unmatched heterojunction between the conducting resin, and easily lead to the resistance value unstable, consequently accessible the metal level promotes (light source device is under the low current drive) resistance value stability. Moreover, any one of the metal layers can also effectively reduce the probability of oxidation of the corresponding contact.

Furthermore, the light source device disclosed in the embodiment of the present invention can be applied to the component having the detection loop formed on the inner surface of the light-transmitting member or the component having the detection loop formed on the outer surface of the light-transmitting member by the arrangement of the conductive unit (e.g., the first pads and the second pads located at different height positions of the enclosing wall).

In addition, the embodiment of the present invention discloses a light source device, the lower step surface of which is separated by one blocking groove between each functional area and any adjacent U-shaped area, so that the first pad on the functional area can avoid touching the adhesive layer and the electrical property is lost efficacy.

The above mentioned embodiments are only preferred and feasible embodiments of the present invention, and are not intended to limit the scope of the present invention, and all equivalent changes and modifications made according to the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A light source device, characterized in that the light source device comprises:

a substrate including a first plate surface and a second plate surface on opposite sides;

the upper electrode layer and the lower electrode layer are respectively arranged on the first plate surface and the second plate surface of the substrate, and the lower electrode layer comprises a first lower electrode layer and a second lower electrode layer;

a light emitting unit mounted on the upper electrode layer and electrically coupled to the first lower electrode layer through the upper electrode layer;

the enclosing wall is arranged on the first plate surface and surrounds the outer side of the light-emitting unit;

a conductive unit disposed on the wall and electrically coupled to the second bottom electrode layer; wherein the conductive unit comprises a plurality of connecting pads; and

an optical element disposed on the wall and covering the light emitting unit, the optical element comprising:

a light transmissive member;

at least one detection loop which is transparent and is formed on the light-transmitting piece and comprises two contacts; and

two metal layers respectively formed on the two contacts;

the two contacts of the at least one detection loop are respectively connected to the pads through the two metal layers, and are further electrically coupled to the second lower electrode layer.

2. The light source device according to claim 1, wherein the light-transmitting member has a central block and a peripheral block surrounding the central block, the light-emitting unit is located right below the central block, and the peripheral block is located above the enclosing wall; wherein, two said contact and two said metal layers of at least one said detection loop are all formed on said peripheral block.

3. The light source device according to claim 2, wherein at least one of the detection circuits is transparent and includes a detection wire connecting two of the contacts, the detection wire being formed in at least one of the central block and the peripheral block.

4. The light source device as claimed in claim 1, wherein the surrounding wall is annularly stepped and comprises:

an upper step surface away from the substrate;

the upper step surface is connected with the inner edge of the upper step surface;

the lower step surface is positioned on the inner side of the upper step surface, and the distance between the lower step surface and the first plate surface is smaller than the distance between the upper step surface and the first plate surface; and

the lower step surface is connected to the inner edge of the lower step surface and is far away from the upper step surface, and the lower step surface surrounds the outer side of the light-emitting unit;

the plurality of pads of the conductive unit include two first pads and two second pads, the plurality of first pads are disposed on the lower step surface, and the plurality of second pads are disposed on at least one of the upper step surface and the upper step surface; the two contacts of at least one of the detection circuits are connected to the two first pads or the two second pads through the two metal layers, respectively.

5. The light source device of claim 4, wherein the light-transmitting member includes an outer surface and an inner surface on opposite sides, and the inner surface faces the light-emitting unit; wherein, at least one of the detection loops is formed on the inner surface, and two of the contacts of at least one of the detection loops are respectively connected to only two of the first pads through two of the metal layers.

6. The light source device of claim 4, wherein the light-transmitting member includes an outer surface and an inner surface on opposite sides, and the inner surface faces the light-emitting unit; wherein, at least one of the detection loops is formed on the outer surface, and two of the contacts of at least one of the detection loops are respectively connected to only two of the second pads through two of the metal layers.

7. The light source device according to claim 1, wherein the light source device comprises two conductive adhesives, and the two conductive adhesives electrically couple two of the pads to two of the metal layers, respectively.

8. The light source device of claim 1, wherein the light source device comprises two conductive adhesives respectively connected to two of the pads, and each of the conductive adhesives is connected to one of the contacts and the metal layer thereon; in each contact and the metal layer on the contact, the area of the contact connected to the corresponding conductive adhesive is smaller than the area of the metal layer connected to the corresponding conductive adhesive.

9. The light source device of claim 1, wherein the light source device comprises two conductive adhesives respectively connected to the two pads, and the two conductive adhesives are also respectively connected to the two metal layers but do not contact any of the contacts.