Wedge-type vehicle bulbs and stop / tail lamps
Patent Information
- Application Number
- JP2021051495
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-03-25
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2041-03-25
Abstract
Description
[Technical field]
[0001] The present invention relates to a wedge-type vehicle bulb and stop / tail lamp. [Background technology]
[0002] Conventionally, wedge-type vehicle bulbs (sometimes called wedge base bulbs; hereinafter, sometimes simply referred to as "vehicle bulbs") have been used as incandescent bulbs for vehicle lighting fixtures. Vehicle bulbs are bulbs that include a light source section equipped with a filament or the like, and a base section (a section that is inserted into a socket section to supply power) that fastens and holds the light source section and is formed into a substantially flat shape. In recent years, there are also vehicle bulbs in which the filament in the light source section has been replaced with an LED. A vehicle lamp equipped with such a vehicle bulb is disclosed in Patent Document 1 listed below.
[0003] Fig. 4(a) shows a front view of a conventional general vehicle bulb 100. As shown in Fig. 4(a), the vehicle bulb 100 includes a main body 110 that houses an LED and various circuit elements, and a substantially flat base 120. In order to accommodate a vehicle lamp that has multiple functions (a stop lamp and a tail lamp), such as a stop / tail lamp, a total of four terminals are provided on the base 120 of the vehicle bulb, including two terminals of a light-emitting circuit (a first light-emitting circuit) for emitting a stop light and two terminals of a light-emitting circuit (a second light-emitting circuit) for emitting a tail light.
[0004] As shown in Figure 4(b), which is a bottom view of the vehicle bulb 100 (base portion 120), these four terminals are arranged such that terminals 121, 124 of the first light-emitting circuit are arranged on the outside and terminals 122, 123 of the second light-emitting circuit are arranged on the inside (terminals 121, 122, 123, 124 are arranged in that order from the left side of the figure).
[0005] In contrast, the socket part into which the base part 120 is inserted has a total of four output terminals (two of which are shared internally), including two main line output terminals (contacts) that connect to the vehicle battery (vehicle power source) via the main line (main wiring) and two secondary line output terminals (contacts) that extend to the vehicle battery via a secondary line (secondary wiring) separate from the main line. Here, as shown in Fig. 5(a), which is a schematic plan view of the socket part (schematic plan view of the joint with the bottom surface of the base part 120), the four output terminals of the socket part are arranged in the order of main line positive terminal 71(+), secondary line positive terminal 72(+), secondary line negative terminal 73(-), and main line negative terminal 74(-) from the left of the figure. [Prior art documents] [Patent documents]
[0006] [Patent Document 1] JP 2003-212039 A Summary of the Invention [Problem to be solved by the invention]
[0007] Incidentally, LEDs have polarity with respect to the direction of voltage application. Therefore, both the first light-emitting circuit (stop light-emitting circuit) connected to the main line output terminal of the socket and the second light-emitting circuit (tail light-emitting circuit) connected to the sub line output terminal include a diode that protects the LEDs and other components from reverse voltage when connected in the reverse direction to the normal direction, and a surge absorbing element that protects the LEDs and other components from negative polarity transient voltage (for example, reverse voltage that occurs momentarily when the ignition or relay is disconnected).
[0008] At this time, the anode of the diode of the first light-emitting circuit is disposed on the terminal 121 side shown in Fig. 4(b), and the cathode is disposed on the terminal 124 side (terminal 121 is referred to as the "anode terminal of the first light-emitting circuit", and terminal 124 is referred to as the "cathode terminal of the first light-emitting circuit"). Also, the anode of the diode of the second light-emitting circuit is disposed on the terminal 122 side shown in Fig. 4(b), and the cathode is disposed on the terminal 123 side (terminal 122 is referred to as the "anode terminal of the second light-emitting circuit", and terminal 123 is referred to as the "cathode terminal of the second light-emitting circuit").
[0009] When the terminals of the socket and the terminals of the first and second light-emitting circuits are connected as follows, a forward voltage is applied to the first and second light-emitting circuits, causing a drive current to flow through the LED light source, causing the stop light and tail light to be emitted. (1) The main line positive terminal 71 of the socket portion and the anode terminal 121 of the first light-emitting circuit are connected. (2) The secondary line positive terminal 72 of the socket portion and the anode terminal 122 of the second light-emitting circuit are connected. (3) The secondary line negative terminal 73 of the socket portion and the cathode terminal 123 of the second light-emitting circuit are connected. (4) The main line negative terminal 74 of the socket portion and the cathode terminal 124 of the first light-emitting circuit are connected.
[0010] In contrast, when the base part 120 of the vehicle bulb 100 is rotated 180° from the above-mentioned state (in the reverse direction) and inserted into the socket part 100, the terminals of the first light-emitting circuit and the second light-emitting circuit are arranged in the order of terminals 124, 123, 122, and 121 from the left, as shown in Fig. 4(c). As a result, the polarities of the terminals of the socket part and the terminals of the first light-emitting circuit and the second light-emitting circuit do not match, and the current flowing through the first light-emitting circuit and the second light-emitting circuit is blocked by the diode for reverse voltage protection.
[0011] Therefore, no drive current flows through the LED light source, and neither stop light nor tail light is emitted from the LED light source. However, if the base portion 120 of the vehicle bulb 100 is removed from the socket portion, then inverted (rotated 180 degrees to return to the state shown in Figure 4(b)) and inserted back into the socket portion, a forward voltage is applied to the first light-emitting circuit and the second light-emitting circuit, and a drive current flows through the LED light source. This ensures normal operation of the vehicle bulb 100. Note that vehicle models equipped with a socket portion having this terminal arrangement are hereinafter referred to as "general vehicle models."
[0012] However, in the socket part attached to some special vehicle models (hereinafter referred to as "special vehicle models"), the terminal arrangement of the socket part may differ from that of general vehicle models. Specifically, as shown in Fig. 5(b), which is a schematic plan view of the socket part of a special vehicle model (schematic plan view of the joint with the bottom surface of the base part 120), the terminals of the socket part are arranged in the following order from the left end of the figure: main line positive terminal 81(+), secondary line negative terminal 82(-), secondary line positive terminal 83(+), and main line negative terminal 84(-).
[0013] At this time, when the terminals of the socket part and the terminals of the first light-emitting circuit and the second light-emitting circuit are connected as follows (when the base part 120 is inserted into the socket part in the state of FIG. 4(b)), the current flowing through the second light-emitting circuit is blocked by the diode for reverse voltage protection. As a result, no tail light is emitted from the LED light source. (1) The main line positive terminal 81 of the socket portion and the anode terminal 121 of the first light-emitting circuit are connected. (2) The secondary line negative terminal 82 of the socket portion and the anode terminal 122 of the second light-emitting circuit are connected. (3) The secondary line positive terminal 83 of the socket portion and the cathode terminal 123 of the second light-emitting circuit are connected. (4) The main line negative terminal 84 of the socket portion and the cathode terminal 124 of the first light-emitting circuit are connected.
[0014] On the other hand, when the base part 120 is rotated 180 degrees from this state (state of FIG. 4(c)) and inserted into the socket part, the terminals of the socket part and the terminals of the first light-emitting circuit and the second light-emitting circuit are connected as follows: As a result, the current flowing through the first light-emitting circuit is blocked by the diode for power supply reverse connection protection, and the stop light is not emitted from the LED light source. (1) The main line positive terminal 81 of the socket portion and the cathode terminal 124 of the first light-emitting circuit are connected. (2) The secondary line negative terminal 82 of the socket portion and the cathode terminal 123 of the second light-emitting circuit are connected. (3) The secondary line positive terminal 83 of the socket portion and the anode terminal 122 of the second light-emitting circuit are connected. (4) The main line negative terminal 84 of the socket portion and the anode terminal 121 of the first light-emitting circuit are connected.
[0015] In other words, no matter how the base portion 120 of the vehicle bulb 100 is inserted into the socket portion, neither the stop light nor the tail light is emitted. However, this problem and the means for solving it are not disclosed or suggested in Patent Document 1. In addition, Patent Document 1 is not a stop / tail lamp in the first place.
[0016] Of course, the above problem can be solved by separately producing a vehicle bulb that is compatible with the socket of a special vehicle model. However, this solution requires that vehicle bulbs compatible with special vehicle models be produced separately from vehicle bulbs compatible with general vehicle models, which leads to high product manufacturing and management costs. In addition, if the one-way rectifier (e.g., a diode) is removed from the first light-emitting circuit and the second light-emitting circuit and the circuit structure is changed to a bidirectional rectifier structure, the stop light and tail light can be emitted from the LED light source regardless of the direction (polarity) of the applied voltage. However, this solution increases the risk of damage to the LED light source due to reverse voltage, and leads to high manufacturing costs due to the complexity of the circuit structure.
[0017] In view of the above problems, the present invention aims to provide a wedge-type vehicle bulb that is guaranteed to operate normally in both general and special vehicle models even if a polarized element is included in the first or second light-emitting circuit, is highly versatile, and does not cause excessive cost increases. Another object of the present invention is to provide a stop / tail lamp equipped with the vehicle bulb. [Means for solving the problem]
[0018] In order to solve the above-mentioned problems, the wedge-type vehicle valve according to the present invention comprises: An LED light source, a first light emitting circuit that causes the LED light source to emit a stop light, and a second light emitting circuit that causes the LED light source to emit a tail light; A main body including: A substantially flat base portion extending from the main body portion; Equipped with The above First light emitting circuit and The above At least one of the second light-emitting circuits includes a non-polarizing rectifier, The above First light emitting circuit and The above The other of the two light-emitting circuits teeth , with reverse voltage protection 、 the base portion includes two terminals connected to the first light-emitting circuit and two terminals connected to the second light-emitting circuit, the two terminals of the first light-emitting circuit are disposed on each side surface of the base portion outside the two terminals of the second light-emitting circuit and in point-symmetric positions with respect to the center of the base portion; The two terminals of the second light-emitting circuit are disposed on each side surface of the base closer to the center than the terminals of the first light-emitting circuit and in point-symmetric positions with respect to the center of the base. R It is characterized by:
[0019] According to this aspect of the present invention, at least one of the first light-emitting circuit and the second light-emitting circuit includes a non-polarized rectifier, so that even if a reverse voltage (a voltage in the opposite direction to the forward direction) is applied to at least one of the first light-emitting circuit and the second light-emitting circuit, a drive current can be passed through the LED light source. Therefore, normal operation is guaranteed regardless of whether the vehicle is a general vehicle or a special vehicle. In addition, since a highly versatile vehicle bulb can be provided in this way, excessive cost increases are not incurred.
[0021] According to this aspect of the present invention, since the other of the first light-emitting circuit and the second light-emitting circuit is equipped with a reverse voltage protection unit, it is possible to provide a vehicle bulb that is highly versatile regardless of whether it is a general-purpose vehicle model or a special vehicle model, and it is also possible to effectively protect the LED light source from reverse voltage.
[0022] Furthermore, in the wedge-type vehicle valve according to the present invention, The first light-emitting circuit includes a reverse voltage protection unit, The second light-emitting circuit includes a non-polarizing rectifier. It is preferable.
[0023] According to this aspect of the present invention, the risk of damage to the LED light source can be reduced by providing a reverse voltage protection unit in the light-emitting circuit (first light-emitting circuit) of the stop light, which is used for a long time and turns on and off frequently, and is likely to be subjected to reverse voltage. In other words, the wedge-type vehicle bulb according to this aspect can operate normally regardless of whether it is a general vehicle model or a special vehicle model, and can reduce the risk of damage to the LED light source compared to an aspect in which a non-polarizing rectifier is provided in both the first light-emitting circuit and the second light-emitting circuit, or an aspect in which a non-polarizing rectifier is provided in the first light-emitting circuit and a reverse voltage protection unit is provided in the second light-emitting circuit.
[0024] In addition, the stop / tail lamp according to the present invention is The wedge-type vehicle valve is provided It is characterized by:
[0025] According to this aspect of the present invention, at least one of the first light-emitting circuit and the second light-emitting circuit includes a non-polarizing rectifier, so that even if a reverse voltage is applied to at least one of the first light-emitting circuit and the second light-emitting circuit, a driving current can be passed through the LED light source. Therefore, normal operation is guaranteed regardless of whether the vehicle is a general vehicle or a special vehicle. In addition, since a stop / tail lamp including a highly versatile vehicle bulb can be provided in this way, excessive cost increases are not incurred. Effect of the Invention
[0026] According to the present invention, even if a polarized element is included in the first light-emitting circuit or the second light-emitting circuit, a wedge-type vehicle bulb can be provided that is guaranteed to operate normally in both general-purpose and special-purpose vehicles and does not cause excessive cost increases, and further, a stop / tail lamp equipped with the wedge-type vehicle bulb can be provided. [Brief description of the drawings]
[0027] [Figure 1] FIG. 2 is a circuit diagram of a vehicle valve according to the embodiment. [Diagram 2] FIG. 4 is a circuit diagram for explaining the operation of the vehicle bulb according to the present embodiment when it is inserted into a socket portion of a general vehicle model. [Diagram 3] FIG. 4 is a circuit diagram for explaining the operation of the vehicle bulb according to the present embodiment when it is inserted into a socket portion of a special vehicle model. [Figure 4] 1A and 1B are front and bottom views of a conventional vehicle valve. [Diagram 5] Schematic plan views of socket portions of general vehicle types and special vehicle types. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0028] A stop / tail lamp and a vehicle bulb according to one embodiment of the present invention will be described in detail below with reference to the drawings. A stop / tail lamp 10 according to this embodiment includes a vehicle bulb 20, which will be described later, and a socket portion into which the vehicle bulb 20 is inserted. First, the configuration (particularly the circuit configuration) of the vehicle bulb 20 according to this embodiment will be described with reference to Fig. 1. Here, Fig. 1 is a circuit diagram of the vehicle bulb 20.
[0029] The vehicle bulb 20 is a wedge-type vehicle bulb for a so-called stop / tail lamp. That is, the vehicle bulb 20 includes an LED light source 30, and also includes a substantially flat base portion 40 extending downward from a main body portion that houses the LED light source 30 and various circuits (circuit board, etc.). Note that the embodiment shown in FIG. 1 includes two LED light sources 30 connected in series, but the number of LED light sources is not limited to this. In addition, the connection form of the LED light sources is not limited to this, and for example, a plurality of LED groups each having a plurality of LED light sources 30 connected in series may be connected in parallel.
[0030] The base portion 40 is provided with terminals 41 to 44 (terminals corresponding to the above-mentioned terminals 121 to 124) of an LED light-emitting circuit (a first light-emitting circuit for emitting stop light and a second light-emitting circuit for emitting tail light, which will be described later) disposed in the vehicle bulb 20. In this embodiment, the terminals are terminals (terminals 41, 44) of the first light-emitting circuit (stop light-emitting circuit) and terminals (terminals 42, 43) of the second light-emitting circuit (tail light-emitting circuit).
[0031] The socket portion of the stop / tail lamp 10 has a joint portion recessed for inserting the base portion 40 of the vehicle bulb 20. On the inner surface (inner bottom surface) of the joint portion, for example, terminals (contact points) are provided for electrical connection to the vehicle battery and for connection to the terminals 41, 44 of the first light-emitting circuit and the terminals 42, 43 of the second light-emitting circuit. The socket portion in this embodiment has four terminals (terminals corresponding to the output terminals 71-74, 81-84 of the socket portion described above). Each of the four terminals is arranged so as to be connectable to the terminals 41, 44 of the first light-emitting circuit and the terminals 42, 43 of the second light-emitting circuit.
[0032] Next, the vehicle bulb 20 further includes a first light-emitting circuit that causes the LED light source 30 to emit a stop light, and a second light-emitting circuit that causes the LED light source 30 to emit a tail light. As shown in FIG. 1, the first light-emitting circuit of this embodiment includes the LED light source 30 and a reverse voltage protection unit 50 in addition to the terminals 41 and 44 described above.
[0033] 1, the anode of the diode 51 is connected to the terminal 41 of the first light-emitting circuit, and the cathode is connected to the LED light source 30 via the LED current control unit. The first light-emitting circuit may also include a transient voltage protection element (Zener diode) 52 connected to the LED current control unit.
[0034] By providing the first light-emitting circuit with the diode 51 and the Zener diode 52, the LED light source 30 can be effectively protected from reverse voltage while having a simple (low-cost) circuit configuration. However, the form of the reverse voltage protection unit 50 is not limited to this, and may be other elements or circuits having a rectifying effect (for example, a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) or a circuit including the same).
[0035] 1, the second light-emitting circuit of the present embodiment includes, in addition to the above-mentioned terminals 42 and 43, an LED light source 30 and a non-polarizing rectifier 60. An example of the non-polarizing rectifier 60 is a bridge diode 60 connected to the terminals 42 and 43 of the second light-emitting circuit.
[0036] By providing a bridge diode 60 in the second light-emitting circuit, even if the terminals 42 and 43 of the second light-emitting circuit and the respective terminals in the socket section are connected in reverse (when the terminal 42 of the second light-emitting circuit is connected to the secondary line positive terminal of the socket section, and the terminal 43 of the second light-emitting circuit is connected to the secondary line negative terminal of the socket section), tail light can be emitted from the LED light source 30.
[0037] However, the form of the non-polarizing rectifier 60 is not limited to this, and may be other elements or circuits having a non-polarizing rectifying function. However, when the non-polarizing rectifier is the bridge diode 60, the bridge diode 60 includes a diode having a rectifying function by itself, and therefore can reduce the voltage that may be applied to the LED light source 30. In addition, the bridge diode 60 has a simple circuit configuration, and is preferable in that it does not lead to a rise in costs. The Zener diode 52 also functions as a protection element when a reverse voltage (negative transient voltage, etc.) is applied to the LED light source 30 from the terminals 42, 43 of the second light-emitting circuit.
[0038] Next, the operation of the first light-emitting circuit and the second light-emitting circuit in the vehicle bulb 20 will be described with reference to Fig. 2 and Fig. 3. Fig. 2 is a circuit diagram for explaining the operation when the vehicle bulb 20 (base part 40) is inserted into the socket part of a general vehicle model. Fig. 3 is a circuit diagram for explaining the operation when the vehicle bulb 20 (base part 40) is inserted into the socket part of a special vehicle model.
[0039] First, referring to Fig. 2, the operation when the vehicle bulb 20 is inserted into the socket part of a general vehicle model will be described. The terminals in the socket part (general vehicle model) are arranged from the top of Fig. 2 as follows: main line positive terminal 71, sub line positive terminal 72, sub line negative terminal 73, and main line negative terminal 74 (this arrangement corresponds to the terminal arrangement in Fig. 5(a)). At this time, the terminals of the socket part (general vehicle model) and the terminals of the first light-emitting circuit and the second light-emitting circuit in the vehicle bulb 20 are connected as shown in Fig. 2.
[0040] That is, (1) The main line positive terminal 71 and the terminal 41 of the first light-emitting circuit are connected. (2) The secondary line positive terminal 72 and the terminal 42 of the second light-emitting circuit are connected. (3) The secondary negative terminal 73 and the terminal 43 of the second light-emitting circuit are connected. (4) The main line negative terminal 74 and the terminal 44 of the first light-emitting circuit are connected. The main line positive terminal 71 and the sub line positive terminal 72 are terminals connected to the positive electrode side of the vehicle battery. The main line negative terminal 74 and the sub line negative terminal 73 are terminals connected to the negative electrode side of the vehicle battery. Explanation of the vehicle side lamp switches between them will be omitted.
[0041] When the vehicle bulb 20 is inserted into a socket of a general vehicle, this connection between the terminals of the socket and the terminals of the first and second light-emitting circuits may be referred to as the "normal" connection.
[0042] At this time, as indicated by the reference symbol C11, the current of the first light-emitting circuit flows from the terminal 41 through the diode 51 and the LED current control unit to the LED light source 30. Thereafter, as indicated by the reference symbol C12, the current flows to the terminal 44, and the stop light is emitted.
[0043] Moreover, the current of the second light-emitting circuit passes through the bridge diode 60 to the LED light source 30 side as indicated by the reference symbol C21, and passes through the bridge diode 60 to the terminal 43 as indicated by the reference symbol C22. This causes a drive current to flow through the LED light source 30, causing it to emit tail light.
[0044] When the base 40 of the vehicle bulb 20 is inserted in the socket (for a general vehicle) in the opposite direction, the vehicle bulb 20 can be rotated 180° to connect the terminals of the socket to the terminals of the first and second light-emitting circuits in the normal state. This causes the LED light source 30 to emit stop light and tail light.
[0045] Next, referring to Fig. 3, the operation when the vehicle bulb 20 (base portion 40) is inserted into the socket portion of a special vehicle model will be described. The terminals in the socket portion (special vehicle model) are arranged from the top of Fig. 3 as follows: main line positive terminal 81, sub line negative terminal 82, sub line positive terminal 83, and main line negative terminal 84 (this arrangement corresponds to the terminal arrangement in Fig. 5(b)). Here, the terminals of the socket portion (special vehicle model) and the terminals of the first light-emitting circuit and the second light-emitting circuit are connected as shown in Fig. 3.
[0046] That is, (1) The main line positive terminal 81 and the terminal 41 of the first light-emitting circuit are connected. (2) The secondary negative terminal 82 and the terminal 42 of the second light-emitting circuit are connected. (3) The secondary line positive terminal 83 and the terminal 43 of the second light-emitting circuit are connected. (4) The main line negative terminal 84 and the terminal 44 of the first light-emitting circuit are connected. The main line positive terminal 81 and the sub line positive terminal 83 are terminals connected to the positive electrode side of the vehicle battery, while the main line negative terminal 82 and the sub line negative terminal 84 are terminals connected to the negative electrode side of the vehicle battery.
[0047] When the vehicle bulb 20 is inserted into a socket of a special vehicle model, this connection between the terminals of the socket and the terminals of the first and second light-emitting circuits may be referred to as the "normal" connection.
[0048] At this time, the current of the first light-emitting circuit flows from the terminal 41 through the diode 51 and the LED current control unit to the LED light source 30 as indicated by the reference symbol C31, and also flows to the terminal 44 as indicated by the reference symbol C32. This causes a drive current to flow through the LED light source 30, causing the stop light to be emitted.
[0049] Further, the current of the second light-emitting circuit flows from the terminal 43 through the bridge diode 60 to the LED light source 30 side as indicated by reference symbol C41, and also flows through the bridge diode 60 to the terminal 42 as indicated by reference symbol C42. This causes a drive current to flow through the LED light source 30, causing tail light to be emitted. That is, in the second light-emitting circuit, the bridge diode 60 causes a current to flow through the LED light source 30 regardless of the direction of the applied voltage (current).
[0050] According to the first light-emitting circuit and the second light-emitting circuit of this embodiment, even if the vehicle bulb 20 is inserted into the socket of both a general vehicle and a special vehicle, the stop light and the tail light can be emitted from the LED light source 30. This makes it possible to provide a vehicle bulb 20 that is highly versatile and does not incur excessive cost increases.
[0051] Furthermore, when the base portion 40 of the vehicle bulb 20 is inserted into the socket portion (special vehicle model) in the opposite direction, the vehicle bulb 20 can be rotated 180 degrees to connect each terminal of the socket portion to each terminal of the first light-emitting circuit and the second light-emitting circuit in the correct state.
[0052] However, the embodiment of the vehicle bulb 20 is not limited to the above. As an example of another embodiment, both the first light-emitting circuit and the second light-emitting circuit may have a non-polarized rectifier (for example, a bridge diode). Also, the first light-emitting circuit may have a non-polarized rectifier (for example, a bridge diode), and the second light-emitting circuit may have a reverse voltage protection unit (for example, at least one diode).
[0053] However, in an embodiment in which both the first light-emitting circuit and the second light-emitting circuit are provided with a non-polarized rectifier, the first light-emitting circuit and the second light-emitting circuit do not have a reverse voltage protection function (e.g., a diode), and therefore there is an increased risk of damage to the LED light source 30 due to application of a negative high voltage. In this regard, the above-mentioned embodiment (an embodiment in which the first light-emitting circuit is provided with a reverse voltage protection unit and the second light-emitting circuit is provided with a non-polarized rectifier) is preferable to this embodiment (an embodiment in which both the first light-emitting circuit and the second light-emitting circuit are provided with a non-polarized rectifier).
[0054] In addition, in the embodiment in which the first light-emitting circuit includes a non-polarizing rectifier and the second light-emitting circuit includes a reverse voltage protection unit, the first light-emitting circuit for emitting the stop light, which is used for a long time (high frequency of use), does not include a reverse voltage protection unit. Therefore, compared to the above-mentioned embodiment (in which the first light-emitting circuit includes a reverse voltage protection unit and the second light-emitting circuit includes a non-polarizing rectifier), the risk of damage to the LED light source 30 due to reverse voltage is higher. In this regard, the above-mentioned embodiment (in which the first light-emitting circuit includes a reverse voltage protection unit and the second light-emitting circuit includes a non-polarizing rectifier) is preferable to the embodiment (in which the first light-emitting circuit includes a non-polarizing rectifier and the second light-emitting circuit includes a reverse voltage protection unit).
[0055] On the other hand, in this embodiment (an embodiment in which the first light-emitting circuit includes a non-polarized rectifier and the second light-emitting circuit includes a reverse voltage protection unit), when the vehicle bulb 20 is inserted in the socket part in the reverse direction to the normal direction, the tail light is not emitted but the stop light is emitted. That is, in this embodiment (an embodiment in which the first light-emitting circuit includes a non-polarized rectifier and the second light-emitting circuit includes a reverse voltage protection unit), the stop light that is emitted when the user presses the brake pedal is emitted regardless of the insertion state of the vehicle bulb 20. Therefore, the task of checking whether the vehicle bulb 20 is inserted in the socket part properly can be performed by checking whether the tail light that is visible is turned on or off without the user's action (for example, pressing the brake pedal). Therefore, the user can check whether the vehicle bulb 20 is inserted in the socket part properly by himself or herself. In this respect, this embodiment is preferable to the above-mentioned embodiment (an embodiment in which the first light-emitting circuit includes a reverse voltage protection unit and the second light-emitting circuit includes a non-polarized rectifier).
[0056] The exemplified vehicle bulb 20 may further include other circuits, such as a light switching circuit that switches the main light emission from the tail light to the stop light based on the input of a stop signal (a signal indicating pressing of the brake pedal).
[0057] The embodiments of the present invention have been described above in detail. However, the above description is for the purpose of facilitating understanding of the present invention, and is not intended to limit the present invention. The present invention includes things that can be modified or improved without departing from the spirit of the present invention. In addition, the present invention includes its equivalents. [Explanation of symbols]
[0058] 10... Stop / tail lamp 20...Vehicle valve 30…LED light source 40…Flange part 41, 44...Terminals of the first light-emitting circuit 42, 43...Terminals of the second light-emitting circuit 51...Diode 52...Zener diode 60…Bridge diode 71~74...Terminals of sockets in general vehicle models 81~84...Terminals of sockets in special vehicles
Claims
1. A main body including an LED light source, a first light emitting circuit that causes the LED light source to emit a stop light, and a second light emitting circuit that causes the LED light source to emit a tail light; A substantially flat base portion extending from the main body portion; Equipped with At least one of the first light-emitting circuit and the second light-emitting circuit includes a non-polarizing rectifier, the other of the first light-emitting circuit and the second light-emitting circuit includes a reverse voltage protection unit, the base portion includes two terminals connected to the first light-emitting circuit and two terminals connected to the second light-emitting circuit, the two terminals of the first light-emitting circuit are disposed on each side surface of the base portion outside the two terminals of the second light-emitting circuit and in point-symmetric positions with respect to the center of the base portion; The two terminals of the second light-emitting circuit are disposed on each side surface of the base closer to the center than the terminals of the first light-emitting circuit and in point-symmetric positions with respect to the center of the base. A wedge-type vehicle valve.
2. A main body including an LED light source, a first light emitting circuit that causes the LED light source to emit a stop light, and a second light emitting circuit that causes the LED light source to emit a tail light; A substantially flat base portion extending from the main body portion; Equipped with The first light-emitting circuit includes a reverse voltage protection unit, the second light-emitting circuit includes a non-polarizing rectifier; the base portion includes two terminals connected to the first light-emitting circuit and two terminals connected to the second light-emitting circuit, the two terminals of the first light-emitting circuit are disposed on each side surface of the base portion outside the two terminals of the second light-emitting circuit and in point-symmetric positions with respect to the center of the base portion; The two terminals of the second light-emitting circuit are disposed on each side surface of the base closer to the center than the terminals of the first light-emitting circuit and in point-symmetric positions with respect to the center of the base. A wedge-type vehicle valve.
3. The first light-emitting circuit includes a reverse voltage protection unit; The second light-emitting circuit includes a non-polarizing rectifier.
2. The wedge-type vehicle valve of claim 1.
4. The wedge-type vehicle valve according to any one of claims 1 to 3 is provided. A stop / tail lamp characterized by the above.