JP6461379B2 - LED straight tube lamp - Google Patents

Description

  Embodiments of the present disclosure relate to features of light emitting diode (LED) illumination. More particularly, the disclosed embodiments describe various improvements to LED straight tube lamps.

  LED lighting technology is developing rapidly and is replacing traditional incandescent and fluorescent lighting. Compared to straight tube fluorescent lamps that require filling with inert gas or mercury, LED straight tube lamps do not use mercury. Thus, among various available lighting systems used in homes and workplaces where conventional lighting devices such as compact fluorescent light bulbs (CFLs) and straight tube fluorescent lamps were once mainstream. It is no surprise that LED straight tube lamps have become a highly desirable lighting option. Advantages of LED straight tube lamps include improved durability and service life, and a significant reduction in energy consumption. Thus, considering all factors, LED straight tube lamps are generally a cost-effective lighting option.

  A typical LED straight tube lamp includes a lamp tube, a circuit board that is disposed in the lamp tube and on which a plurality of light sources are mounted, and end caps that are provided at both ends of the lamp tube and on which a power source is mounted. Electricity is sent through a circuit board to a plurality of light sources. However, existing LED straight tube lamps have several drawbacks. For example, since a typical circuit board is hard, even when the lamp tube is partially broken or broken, the straight tube configuration as the entire lamp tube can be maintained, but the straight tube configuration is maintained. For this reason, the user may be given the wrong impression that the LED straight tube lamp is still usable, and the user who touches or installs the LED straight tube lamp may receive an electric shock. .

  In general, the circuit design of conventional LED straight tube lamps does not provide an appropriate solution for meeting relevant certification standards. For example, fluorescent lamps usually do not include electronic components, so certification based on electromagnetic interference (EMI) standards and safety standards for lighting equipment provided by Underwriters Laboratories (UL) It's really easy to get. However, since LED straight tube lamps contain a considerable number of electronic components, it is important to consider the influence of the layout (structure) of these electronic components, and as a result, conform to the above standards. Is getting harder.

  Moreover, although a direct current drive signal is used for driving the LED, the drive signal for the fluorescent lamp is a low frequency and low voltage alternating current signal provided by an AC power transmission line, a high frequency and high voltage alternating current provided by a ballast. There are also signals, or DC signals provided by emergency lighting batteries. Since the voltage and frequency spectrum of these signals vary considerably depending on the type, simply performing rectification to generate the DC drive signal required for LED straight tube lamps can be used in conventional fluorescent lamp drive systems. It may not be possible to adapt the tube lamp.

  Furthermore, when the LED straight tube lamp has a dual-end power supply structure and one end cap is inserted into the lamp socket, but the other is not inserted, the end cap of the one not inserted into the lamp socket is inserted. There is a possibility that a user who touches a metal part or a conductive part falls into an electric shock state.

  Currently, LED straight tube lamps that are used as an alternative to conventional fluorescent lighting devices can be broadly classified into two types. One is a ballast-compatible LED straight tube lamp such as a T-LED lamp, which can be directly replaced from a straight tube fluorescent lamp without changing the circuit of the lighting device at all. The other is a ballast bypass type LED straight tube lamp, which does not have a conventional ballast on the circuit and directly connects a commercial power source to the LED straight tube lamp. The latter LED straight tube lamp is suitable for a new installation environment equipped with a new drive circuit and LED straight tube lamp.

  Note that the present disclosure may actually include one or more inventions, including those for which patents have been claimed and inventions that have not yet been claimed. In order to avoid confusion due to unnecessarily distinguishing these included inventions in the preparation stage of the present specification, in the present specification, these included multiple inventions are collectively referred to as “(present) invention”.

  In this “Summary of the Invention” section, various embodiments are outlined, and the embodiment may be described in association with the “present invention”. However, the term “present invention” It is used in the description of certain specific embodiments presently disclosed, and is not necessarily an exhaustive description of all possible embodiments, but rather is a summary of certain specific embodiments. Some of the embodiments described below as various aspects of the “invention” can be combined in various forms to form an LED straight tube lamp or a part thereof.

  The present disclosure provides a novel LED straight tube lamp and various aspects thereof.

  According to a specific embodiment, an attachment detection module configured to detect an attachment state of an LED straight tube lamp and a lamp socket in an LED (light emitting diode) straight tube lamp is provided. The attachment detection module includes a detection pulse generation module configured to generate a first pulse signal, a detection result latch circuit configured to receive and output the first pulse signal, and a first from the detection result latch circuit. A switch circuit configured to receive a pulse signal and configured to bring the power loop of the LED straight tube lamp into a conducting state by maintaining a conducting state during the first pulse; and a first sampling on the power loop A detection determination circuit configured to determine an attachment state of the LED straight tube lamp and the lamp socket by detecting a signal;

  In some embodiments, the detection determination circuit outputs a first high level signal when the first sampling signal is greater than or equal to a predetermined signal, and the detection result latch circuit receives the first high level signal. The second high level signal is output, and the switch circuit receives the second high level signal and maintains the conduction state, thereby leaving the power supply loop in the conduction state.

  In some embodiments, the detection determination circuit outputs a first low level signal when the first sampling signal is smaller than a predetermined signal, and the detection result latch circuit receives the first low level signal and receives the second low level signal. A level signal is output and the switch circuit receives the second low level signal and keeps the power loop open by maintaining the off state.

  In some embodiments, the detection pulse generation module further generates a second pulse signal when the power loop remains open, the detection result latch circuit receives and outputs the second pulse signal, and a switch circuit Receives the second pulse signal from the detection result latch circuit and changes the OFF state to the conductive state again during the period of the second pulse, thereby bringing the power supply loop into the conductive state again. By newly detecting the second sampling signal, the mounting state of the LED straight tube lamp and the lamp socket is determined.

  In some embodiments, the detection determination circuit outputs a first high level signal when the second sampling signal is greater than or equal to a predetermined signal, and the detection result latch circuit receives the first high level signal. The second high level signal is output, and the switch circuit receives the second high level signal and maintains the conduction state, thereby leaving the power supply loop in the conduction state.

  In some embodiments, the detection determination circuit outputs a first low level signal when the second sampling signal is smaller than a predetermined signal, and the detection result latch circuit receives the first low level signal and receives the second low level signal. A level signal is output and the switch circuit receives the second low level signal and keeps the power loop open by maintaining the off state.

  In some embodiments, the detection pulse generation module includes a first capacitor having one end connected to the drive signal, a first resistor having one end connected to the other end of the first capacitor and the other end grounded, and an input A first buffer having one end connected to the other end of the first capacitor, a second capacitor having one end connected to the output end of the first buffer, and one end outputting the first buffer. A third capacitor connected to one end, a second resistor having one end connected to the drive signal, the other end connected to the other end of the second capacitor, and one end connected to the other end of the third capacitor, the other end A first diode having a third resistor grounded, an anode connected to the other end of the third resistor, and a cathode connected to one end of the third resistor; an input end and an output end; Is connected to the other end of the second capacitor A second inverter having an input end and an output end, the input end being connected to the other end of the third capacitor, a first input end, a second input end, and an output end The first input terminal is connected to the output terminal of the first inverter, the second input terminal is connected to the output terminal of the second buffer, and the output terminal is connected to the detection result latch circuit.

  In a specific embodiment, the first buffer and the second buffer include two inverters connected in series.

  In some embodiments, the detection result latch circuit includes a data input terminal, a clock input terminal, and an output terminal. The data input terminal is connected to the drive signal, and the clock input terminal is connected to the detection determination circuit. A first input terminal having a 1D flip-flop, a fourth resistor having one end connected to the output terminal of the first D flip-flop and the other terminal grounded, a first input terminal, a second input terminal, and an output terminal; Is connected to the output terminal of the first OR gate, the second input terminal is connected to the output terminal of the first D flip-flop, and the output terminal is connected to the switch circuit.

  In some embodiments, the switch circuit includes a base, a collector, and an emitter, the base is connected to the output terminal of the second OR gate, the collector is connected to one end of the power supply loop, and the emitter is a detection determination circuit. A first transistor connected to the.

  In some embodiments, the detection determination circuit includes a fifth resistor having one end connected to the emitter of the first transistor and the other end connected to the other end of the power supply loop, a first input terminal, a second input terminal, And a first input terminal connected to a prescribed signal, a second input terminal connected to one end of the fifth resistor, and an output terminal connected to the clock input terminal of the first D flip-flop. And a comparator.

  In some embodiments, the detection pulse generation module includes a sixth resistor having one end connected to the drive signal, a fourth capacitor having one end connected to the other end of the sixth resistor and the other end grounded, and an input And a seventh resistor having one end connected to one end of the fourth capacitor, and a Schmitt trigger having one end connected to one end of the fourth capacitor. A second transistor whose base is connected to the other end of the seventh resistor, whose emitter is grounded, and whose one end is connected to the base of the second transistor and whose other end is the detection result And an eighth resistor connected to the latch circuit and the switch circuit.

  In certain embodiments, the detection pulse generation module further comprises a Zener diode having an anode and a cathode, the anode connected to the other end of the fourth capacitor, and the cathode connected to one end of the fourth capacitor. .

  In some embodiments, the detection result latch circuit includes a data input terminal, a clock input terminal, and an output terminal. The data input terminal is connected to the drive signal, and the clock input terminal is connected to the detection determination circuit. 2D flip-flop, having a first input terminal, a second input terminal, and an output terminal, the first input terminal is connected to the output terminal of the Schmitt trigger, and the second input terminal is connected to the output terminal of the second D flip-flop The output terminal includes a third OR gate connected to the other end of the eighth resistor and the switch circuit.

  In some embodiments, the switch circuit includes a base, a collector, and an emitter, the base is connected to the output terminal of the third OR gate, the collector is connected to one end of the power supply loop, and the emitter is a detection determination circuit. And a third transistor connected to the.

  In some embodiments, the detection determination circuit includes a ninth resistor having one end connected to the emitter of the third transistor and the other end connected to the other end of the power supply loop, a first input terminal, a second input terminal, And a second input terminal connected to a prescribed signal, a second input terminal connected to one end of the ninth resistor, and an output terminal connected to the clock input terminal of the second D flip-flop. And a comparator.

  In some embodiments, the detection determination circuit includes a ninth resistor having one end connected to the emitter of the third transistor and the other end connected to the other end of the power supply loop, an anode and a cathode, A second diode connected to one end of the resistor, a first input terminal, a second input terminal, and an output terminal; the first input terminal is connected to a prescribed signal; the second input terminal is a second diode A second comparator having an output terminal connected to the clock input terminal of the second D flip-flop, a first input terminal, a second input terminal, and an output terminal, and the first input terminal is a second input terminal. A third comparator connected to the cathode of the diode, having a second input connected to another specified signal, an output connected to the clock input of the second D flip-flop, and a first connected to the drive signal; 10 resistance Comprises one end connected to the second input terminal of the other end and a second comparator of the tenth resistor, an eleventh resistor whose other end is grounded, and a fifth capacitor connected in parallel to the eleventh resistor.

  In certain embodiments, the duration of the first pulse signal is between 10 microseconds and 1 millisecond and the duration of the second pulse signal is between 10 microseconds and 1 millisecond.

  In a specific embodiment, when T is the period of the drive signal, X is an integer greater than or equal to zero, and 0 <Y <1, the time interval from the first pulse signal to the second pulse signal is (X + Y) ( T / 2).

  In certain embodiments, the duration of the first pulse signal is between 1 microsecond and 100 microseconds, and the duration of the second pulse signal is between 1 microsecond and 100 microseconds.

  In certain embodiments, the time interval from the first pulse signal to the second pulse signal is between 3 milliseconds and 500 milliseconds.

  According to some embodiments, the LED straight tube lamp comprises an LED module disposed on a flexible circuit sheet electrically connected to a printed circuit board on which the mounting detection module is configured, and the flexible circuit The sheet is placed under the printed circuit board so that it is electrically connected to the printed circuit board by soldering.

  According to some embodiments, the flexible circuit sheet includes a first surface and a second surface, and a plurality of first soldering pads are formed on the first surface of the flexible circuit sheet. The printed circuit board has a top surface and a bottom surface, and a plurality of second solder pads are formed on the top surface of the printed circuit board, and each of the bottom surfaces of the printed circuit board corresponds to the plurality of second solder pads. A plurality of third soldering pads are formed. The plurality of first soldering pads on the first surface of the flexible circuit sheet are electrically connected to the plurality of third soldering pads on the bottom surface of the printed circuit board by soldering.

  According to some embodiments, the printed circuit board further comprises a plurality of through holes aligned to penetrate the plurality of second and third solder pads on the top and bottom surfaces of the printed circuit board; In order to make an electrical connection to the flexible circuit sheet in the soldering process, at least one of the plurality of through holes is filled with a solder material.

  According to some embodiments, the flexible circuit sheet further comprises at least one notch disposed at an edge of the end of the flexible circuit sheet, the at least one notch being at least one of the plurality of through holes. It is soldered to the printed circuit board in alignment.

  According to some embodiments, the present invention further provides an attachment detection module configured to detect an attachment state of an LED straight tube lamp and a lamp socket in an LED (light emitting diode) straight tube lamp. The mounting detection module receives a first circuit configured to generate a first pulse signal, a second circuit configured to receive and output the first pulse signal, and a first pulse signal from the second circuit. A third circuit configured to bring the power loop of the LED straight tube lamp into a conducting state by maintaining a conducting state during the first pulse period, and a first sampling signal on the power loop is detected And a fourth circuit configured to determine a mounting state of the LED straight tube lamp and the lamp socket.

  According to some embodiments, the present invention further provides a detection method employed by LED straight tube lamps to prevent user electric shock when mounting LED (light emitting element) straight tube lamps in lamp sockets. . The detection method includes a step of generating a first pulse signal by a detection pulse generation module configured in the LED straight tube lamp, and a switch circuit on a power supply loop of the LED straight tube lamp, through a detection result latch circuit. Receiving the first pulse signal and maintaining the conductive state of the switch circuit during the period of the first pulse signal to bring the power loop into a conductive state; and when the power loop is in a conductive state, Detecting a first sampling signal on the power supply loop by a detection determination circuit and comparing the first sampling signal with a prescribed signal. When the first sampling signal is greater than or equal to the prescribed signal, the detection method further includes the step of outputting a first high level signal by the detection determination circuit, and the first high level signal by the detection result latch circuit. Receiving a signal and outputting a second high level signal; and receiving the second high level signal by the switch circuit and maintaining conduction to leave the power loop in a conducting state. .

  In some embodiments, when the first sampling signal is smaller than the prescribed signal, the detection method further includes the step of outputting a first low level signal by the detection determination circuit, and the detection result latch circuit by the detection result latch circuit. Receiving the first low level signal and outputting the second low level signal; receiving the second low level signal by the switch circuit; and maintaining the OFF state so that the power supply loop remains open Including the step of.

In some embodiments, the detection method further includes generating a second pulse signal by the detection pulse generation module when the power supply loop remains open by maintaining an off state of the switch circuit. And the switch circuit receives the second pulse signal through the detection result latch circuit, and makes the power supply loop conductive again by turning the switch circuit off again during the period of the second pulse signal. And a step of detecting a second sampling signal on the power supply loop by the detection determination circuit and comparing the second sampling signal with the prescribed signal when the power supply loop becomes conductive again. Including. When the second sampling signal is greater than or equal to the prescribed signal, the detection method further includes the step of outputting the first high level signal by the detection determination circuit, and the first high signal by the detection result latch circuit. Receiving a level signal and outputting the second high level signal; receiving the second high level signal by the switch circuit and maintaining the conduction state to leave the power supply loop in a conduction state; Including.

  In some embodiments, when the second sampling signal is smaller than the specified signal, the detection method further includes the step of outputting the first low-level signal by the detection determination circuit, and the detection result latch circuit. Receiving the first low level signal and outputting the second low level signal; receiving the second low level signal by the switch circuit; and maintaining the OFF state to open the power supply loop. Leaving.

  According to the detection method described above, in some embodiments, the period (or width) of the first pulse signal is between 10 microseconds and 1 millisecond, and the period (or width) of the second pulse signal is Between 10 microseconds and 1 millisecond.

  According to the detection method described above, in some embodiments, when T is the period of the drive signal, X is an integer greater than or equal to zero, and 0 <Y <1, the second pulse is generated from the first pulse signal. The time interval to the signal is (X + Y) (T / 2).

  According to the detection method described above, in some embodiments, the duration of the first pulse signal is between 1 microsecond and 100 microseconds, and the duration of the second pulse signal is between 1 microsecond and 100 microseconds. Between.

  According to the detection method described above, in some embodiments, the time interval from the first pulse signal to the second pulse signal (or the period of the pulse signal) is between 3 milliseconds and 500 milliseconds. .

FIG. 1 is an LED straight tube lamp according to some exemplary embodiments, bent with both ends passing through the transition region of the lamp tube of the LED straight tube lamp connected to a power source. It is a plane sectional view showing typically an LED straight tube lamp provided with an LED light strip which is a characteristic circuit sheet. FIG. 2 is a cross-sectional plan view schematically showing a two-layer structure of a flexible circuit sheet of an LED light strip in an LED straight tube lamp according to some exemplary embodiments. FIG. 3 is a perspective view schematically illustrating a soldering pad of a flexible circuit sheet of an LED light strip for solder connection to a power source in an LED straight tube lamp according to some exemplary embodiments. FIG. 4A is a perspective view of a flexible circuit sheet and a printed circuit board of a power source soldered together, according to one exemplary embodiment. FIG. 4B is a diagram of a soldering process between the flexible circuit sheet of FIG. 4A and the printed circuit board of the power source, according to an exemplary embodiment. FIG. 4C is a diagram of a soldering process between the flexible circuit sheet of FIG. 4A and the printed circuit board of the power source, according to an exemplary embodiment. FIG. 4D is a diagram of a soldering process between the flexible circuit sheet of FIG. 4A and the printed circuit board of the power source, according to an exemplary embodiment. FIG. 5 is a perspective view schematically illustrating a circuit board assembly comprised of a flexible circuit sheet of an LED light strip and a printed circuit board of a power source, according to some exemplary embodiments. FIG. 6 is a perspective view schematically illustrating another arrangement of a circuit board assembly, according to some exemplary embodiments. FIG. 7 is a perspective view schematically illustrating a flexible circuit sheet of an LED light strip formed of two conductive wiring layers according to some exemplary embodiments. FIG. 8A is a block diagram of an exemplary power system for a straight LED lamp according to some exemplary embodiments. FIG. 8B is a block diagram illustrating an exemplary power system for an LED straight tube lamp according to some exemplary embodiments. FIG. 8C is a block diagram of an exemplary LED lamp according to some exemplary embodiments. FIG. 9 is a schematic diagram of a rectifier circuit according to some exemplary embodiments. FIG. 10A is a block diagram of an example filter circuit according to some example embodiments. FIG. 10B is a block diagram of an example filter circuit according to some example embodiments. FIG. 10C is a block diagram of an example filter circuit according to some example embodiments. FIG. 11A is a schematic diagram of an exemplary LED module according to some exemplary embodiments. FIG. 11B is a schematic diagram of an exemplary LED module according to some exemplary embodiments. FIG. 11C is a plan view of a circuit layout of an LED module according to some exemplary embodiments. FIG. 11D is a plan view of a circuit layout of an LED module according to some exemplary embodiments. FIG. 11E is a plan view of a circuit layout of an LED module according to some exemplary embodiments. FIG. 12A is a block diagram of an example power supply module of an LED lamp according to some example embodiments. FIG. 12B is a block diagram of a drive circuit according to some exemplary embodiments. FIG. 12C is a schematic diagram of an example drive circuit, according to some example embodiments. FIG. 12D is a schematic diagram of an example drive circuit, according to some example embodiments. FIG. 12E is a schematic diagram of an example drive circuit, according to some example embodiments. FIG. 12F is a schematic diagram of an example drive circuit, according to some example embodiments. FIG. 13A is a block diagram of an exemplary power module for an LED straight tube lamp according to some exemplary embodiments. FIG. 13B is a schematic diagram of an over-voltage protection (OVP) circuit according to some exemplary embodiments. FIG. 14A is a block diagram of an exemplary power module in an LED straight tube lamp according to some exemplary embodiments. FIG. 14B is a block diagram of an exemplary power module in an LED straight tube lamp according to some exemplary embodiments. FIG. 14C is a schematic diagram of an auxiliary power module according to some exemplary embodiments. FIG. 15A is a block diagram of an LED straight tube lamp according to some exemplary embodiments. FIG. 15B is a block diagram of an attachment detection module according to some exemplary embodiments. FIG. 15C is a schematic detection pulse generation module according to some exemplary embodiments. FIG. 15D is a schematic detection decision circuit according to some exemplary embodiments. FIG. 15E is a schematic detection result latch circuit according to some exemplary embodiments. FIG. 15F is a schematic switch circuit according to some exemplary embodiments. FIG. 15G is a block diagram of an attachment detection module according to some exemplary embodiments. FIG. 15H is a schematic detection pulse generation module according to some exemplary embodiments. FIG. 15I is a schematic detection result latch circuit according to some exemplary embodiments. FIG. 15J is a schematic switch circuit according to some exemplary embodiments. FIG. 15K is a schematic detection decision circuit according to some exemplary embodiments.

  The present disclosure provides a novel LED straight tube lamp. In the following embodiments, the present disclosure will be described with reference to the drawings. In this specification, the following description of various embodiments of the invention is presented for purposes of illustration and illustration only. Therefore, it is not intended to be exhaustive or to limit to the precise form disclosed. These exemplary embodiments are merely examples, and various implementations and variations are possible that do not require detailed description herein. It should be emphasized that the present disclosure provides a detailed description of alternatives, but not all alternatives. Furthermore, the fact that the various examples are consistent in detail should not be construed as requiring that such details be explained. It is unrealistic to cite all possible variations for all the features described herein. The language of the claims should be referred to in determining the requirements of the invention.

  In the drawings, the size and relative size of each component may be exaggerated for easy understanding. Throughout, like elements are given like numbers.

  The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a”, “an”, and “the” include plural referents unless the content clearly dictates otherwise. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items, and may be abbreviated as “/”.

  It will be appreciated that the terms first, second, third are used herein to describe various elements, parts, regions, layers, or steps, but these elements, parts, regions, layers And / or steps are not limited to these terms. Unless otherwise indicated in the text, these terms are used to distinguish one element, part, region, layer or step from another element, part, region or step, eg, as a naming convention. I'm just there. Thus, a first element, component, region, layer or step discussed in one section of the specification below is within the scope of another section or claim herein without departing from the teaching of the present invention. Sometimes referred to as a second element, part, region, layer or step. Further, in some cases, even if a term that is not described using the terms “first” and “second” in the present specification is used, in the claims, the “first” is used to distinguish different claim elements from each other. Sometimes referred to as “1” or “second”.

  Furthermore, it should be understood that the term “comprises and / or“ comprising ”or“ comprising (including) and / or including ”herein refers to a given feature, region, Specifies the presence of integers, steps, actions, elements and / or parts, but excludes the presence or addition of one or more other features, areas, integers, steps, actions, elements, parts and / or groups Not what you want.

  Of course, when an element is stated to be “connected” or “coupled” to another element or to another element “on”, the element is Or may be directly connected or coupled to another element, or intervening elements may be present. On the other hand, if it is written that one element is “directly connected” or “directly coupled” to another element, there are no intervening elements. Other words used to describe the relationship between elements should be interpreted similarly (eg, “between” and “directly between” or “adjacent”). “Adjacent” and “directly adjacent”). However, the term “contact” as used herein refers to a direct connection (ie, contact) unless otherwise indicated in the text.

  Embodiments described herein will be described with reference to plan views and / or cross-sectional views using ideal schematic views. That is, these exemplary drawings may be modified depending on manufacturing technology and / or manufacturing tolerances. Accordingly, the disclosed embodiments are not limited to those shown in the figures, but also include modifications to configurations formed based on manufacturing processes. Accordingly, the regions illustrated in the drawings are exemplary in nature and the shape of the regions illustrated in the drawings may exemplify specific shapes of elemental regions not limited by aspects of the present invention. .

  As shown in the drawings, in the present specification, “beneath”, “below”, and “lower” are used to clearly explain the relationship between one element or feature and another element or feature. In some cases, terms representing a spatial relative relationship such as “lower”, “above” “above”, and “upper” are used. Of course, the terminology for spatial relative relationships encompasses not only the orientation depicted in the drawings, but also the various orientations of the device that change during use or operation. For example, when an apparatus in the drawing is flipped upside down, an element described as “beneath” or “below” may be above another element or feature “ (Above) ". Thus, the term “below” can encompass both up and down orientations. The device may take other orientations (turn 90 degrees or take various other orientations), and the interpretation of terms used herein to describe the spatial relative relationships will also vary.

  "Same", "equal", "planar", "coplanar" used in this specification when describing orientation, layout, position, shape, size, quantity, and other measurement objects The term “(coplanar)” does not necessarily mean the exact same orientation, layout, position, shape, size, quantity, or other measurement object, but is almost the same, for example, within the tolerances that can occur due to the manufacturing process. Orientation, layout, position, shape, size, quantity, and other measured objects. The term “substantially” may be used herein to emphasize the above meaning, unless otherwise indicated in the text or elsewhere in the description. For example, items described as “substantially the same”, “substantially equal”, or “substantially planar” are exactly the same, equal, or It may be planar, for example “same”, “equal”, or “planar” within the tolerances that can occur due to the manufacturing process.

  Terms such as “about,” “approximately,” or “approximately” are such that the relative relationship changes slightly and / or does not substantially change the orientation, functionality, or structure of a particular element. May represent changing magnitude, orientation, or layout. For example, the range of “about 0.1 to about 1” is 0.1 to 0% to 5% from 1 to 1 as long as the same effect can be maintained even if there is some error. An error range of plus or minus 0% to 5% may be included.

  Unless otherwise defined, all terms used herein (including terminology and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. doing. Furthermore, it should be understood that terms such as those defined in commonly used dictionaries should be construed as having a meaning consistent with the meaning in the relevant art and / or context of the present application. And unless otherwise specified herein, should not be interpreted in an idealized or overly formal sense.

  In this specification, an item described as “electrically connected” is configured to allow an electrical signal to pass from one item to another. Thus, a conductive passive physically connected to an electrically insulating passive component (eg, a prepreg layer on a printed circuit board, an electrically insulating adhesive connecting two devices, an electrically insulating underfill or a mold layer). Parts (eg, wires, pads, internal wires, etc.) cannot be said to be electrically connected to insulating parts. Further, items that are “directly electrically connected” to each other are electrically connected through one or more passive elements such as wires, pads, internal wires, resistors, and the like. Thus, the components that are directly electrically connected do not include components that are electrically connected through active elements such as transistors and diodes. Elements that are directly electrically connected may be directly physically connected and may be directly electrically connected.

  Parts that are described as being thermally connected or in thermal communication are arranged to transfer heat from the first part to the second part along a path between the parts. Simply because the two components are part of the same device or the same board is not thermally connected. In general, a thermally conductive component that is directly connected to another thermally conductive or exothermic component (or connected to such component through an intervening thermally conductive component, or substantially thermally Components that are placed in close proximity to allow transmission are described as being thermally connected to or in thermal communication with such components. On the other hand, two parts sandwiched with a thermal insulation that is a material that substantially prevents heat transfer between the two parts, or a material that allows only incidental heat transfer, are either thermally connected to each other or are It is not described that the communication was made. The term "heat-conductive" (thermally-conductive) does not apply to materials that provide concomitant heat conduction, but generally refers to materials that are considered to have good thermal conductivity, heat transfer It refers to a material that is considered useful, or a component that has a similar thermal conductivity to such a material.

  Each embodiment may be described and illustrated in the form of functional blocks, units and / or modules. Those skilled in the art will recognize that such blocks, units and / or modules can be formed using semiconductor-based fabrication techniques and other manufacturing techniques, logic circuits, discrete components, analog circuits, hard-wired circuits, memory elements, wiring. It will be appreciated that it is physically implemented by electronic (or optical) circuitry such as connections. In the case of blocks, units, and / or modules implemented in a microprocessor or the like, various functions as described herein may be performed by programming using software (eg, microcode). However, it may be arbitrarily driven by firmware and / or software. Alternatively, each block, unit, and / or module may be implemented with dedicated hardware, or dedicated hardware that performs some function and a processor that performs other functions (eg, one or more programmed microprocessors). And a related circuit). Also, each block, unit and / or module of each embodiment may be physically divided into two or more interacting discrete blocks, units and / or modules. Further, the blocks, units and / or modules of the various embodiments may be physically combined into more complex blocks, units and / or modules.

  If a term in this application conflicts with a term used in another application to which this application claims priority, or a term incorporated by reference in this application or another application to which this application claims priority A configuration based on terms used or defined in the present application shall be applied.

  By way of example, in prior US patent application Ser. No. 14 / 724,840 by the Applicant (U.S. Patent Application Publication No. 2016/0091156, the disclosure of which is incorporated herein by reference in its entirety) By providing a flexible circuit sheet, it addresses specific issues associated with the occurrence of electric shock when using conventional LED lamps. Some of the embodiments disclosed in US patent application Ser. No. 14 / 724,840 may be combined with one or more exemplary embodiments disclosed herein to reduce the risk of electric shock when using LED lamps. Generation can be further reduced.

  Referring to FIG. 1, the LED straight tube lamp may include an LED light strip 2. In certain embodiments, the LED light strip 2 may be formed from, for example, a flexible flexible circuit sheet. Further, as described below, the flexible circuit sheet may be described as a flexible circuit board or a flexible or non-rigid tape. Both ends of the flexible circuit sheet may be connected to the power supply 5 through the transition portion of the lamp tube of the LED straight tube lamp. In some embodiments, both ends of the flexible circuit sheet may be connected to a power source in one end cap of the LED straight tube lamp. For example, at both ends of the LED straight tube lamp, a portion of the flexible circuit sheet bends in a direction away from the lamp tube and passes through a transition portion where the lamp tube becomes thin, and the flexible circuit sheet is one of the LED straight tube lamps. A part of the power source in the end cap may be connected so as to overlap vertically.

  Referring to FIG. 2, in order to form the LED light strip 2, the flexible circuit sheet may include a wiring layer 2a having a conductive effect. The LED light source 202 is disposed on the wiring layer 2a and is electrically connected to a power source through the wiring layer 2a. Although only one LED light source 202 is shown in FIG. 2, a plurality of LED light sources 202 may be disposed on the LED light strip 2 as shown in FIG. For example, the plurality of light sources 202 may be arranged in one or more rows extending along the length of the LED light strip 2 extending along the length of the lamp tube, as shown in FIG. In this specification, a wiring layer having a conduction effect is also referred to as a conductive layer. Referring again to FIG. 2, in one embodiment, the LED light strip 2 includes a flexible circuit sheet having a conductive wiring layer 2a and a dielectric layer 2b arranged to be laminated. In some embodiments, the area of the wiring layer 2a and the dielectric layer 2b may be the same, or the area of the wiring layer 2a may be slightly smaller than the area of the dielectric layer 2b. The LED light source 202 is disposed on one surface of the conductive wiring layer 2a, and the dielectric layer 2b is disposed on the other surface of the conductive wiring layer 2a opposite to the LED light source 202 (for example, the LED light source 202 is disposed). The second surface opposite to the first surface is disposed). The wiring layer 2a is electrically connected to the power source 5 (as shown in FIG. 1) and transmits a direct current (DC) signal. In some embodiments, the surface of the dielectric layer 2b far from the wiring layer 2a (for example, the second surface opposite to the first surface of the dielectric layer 2b facing the wiring layer 2a) is, for example, The adhesive sheet 4 is fixed to the inner peripheral surface of the lamp tube. The portion of the dielectric layer 2 b fixed to the inner peripheral surface of the lamp tube 1 may substantially match the shape of the inner peripheral surface of the lamp tube 1. The wiring layer 2a can be a power supply layer including wiring such as a metal layer or a copper wire.

  The power source described in the present specification may include a circuit that converts or generates electric power based on the received voltage in order to supply electric power and operate the LED module of the LED straight tube lamp and the LED light source 202. Good. The power source is described in association with the power source 5, but may alternatively be referred to as a power conversion module or circuit or a power module. The power conversion module or circuit, or the power module may supply or provide power derived from an external signal such as an AC power transmission line or a ballast to the LED module or the LED light source 202. For example, the power supply 5 may refer to a circuit that converts an AC line voltage into a DC voltage and supplies power to the LED or LED module.

  In some exemplary embodiments, the outer surface of the wiring layer 2a or the dielectric layer 2b is covered with a circuit protective layer made of ink that has a function of providing resistance to soldering and increasing reflectance. Also good. Alternatively, in another exemplary embodiment, the dielectric layer may be omitted and the wiring layer may be directly bonded to the inner peripheral surface of the lamp tube, or the outer surface of the wiring layer 2a may be coated with a circuit protective layer. May be. Whether the wiring layer 2a has a single-layer structure or a two-layer structure, a circuit protective layer may be adopted. In some embodiments, the circuit protection layer is disposed on only one surface / one side of the LED light strip 2, such as the surface having the LED light source 202. In some embodiments, the flexible circuit sheet has a single-layer structure composed of only one wiring layer 2a or a two-layer structure composed of one wiring layer 2a and one dielectric layer 2b. Compared with a flexible substrate (two wiring layers and one dielectric layer sandwiched between them), it is more flexible and flexible and can be easily curled. As a result, the flexible circuit sheet of the LED light strip 2 may be attached to a customized or non-cylindrical lamp tube, or it may be fitted snugly to the inner surface of such a lamp tube. In some cases, a flexible circuit sheet in close contact with the inner surface of such a lamp tube is desirable. Furthermore, the use of a flexible circuit sheet with a small number of layers improves heat dissipation, reduces material costs, provides an opportunity to be more environmentally friendly and enhance the flexibility effect.

  However, the flexible circuit sheet is not limited to a single layer structure or a two layer structure. In another embodiment, the flexible circuit sheet includes a plurality of layers composed of a plurality of wiring layers 2a and a plurality of layers composed of a plurality of dielectric layers 2b, and the plurality of wiring layers 2a and the plurality of dielectric layers 2b are provided. You may laminate | stack alternately. Such a laminate is located between the outermost wiring layer 2a where the LED light source 202 is disposed (as viewed from the inner peripheral surface of the lamp tube) and the inner peripheral surface of the lamp tube (see FIG. 1). It may be electrically connected to the power supply 5 (as shown). Further, in some embodiments, the length of the flexible circuit sheet (eg, the length along the surface from one end of the flexible circuit sheet to the second end) (or the flexible circuit sheet in the axial direction). The length when viewed by projection) is longer than the length of the lamp tube (or the length when viewed by projecting the lamp tube in the axial direction), or two transitional portions at both ends of the lamp tube It is at least longer than the central portion (for example, the region where the circumference of the lamp tube becomes narrow). For example, the length along the contour of one surface of the flexible circuit sheet (for example, the upper surface of the circuit sheet) may be longer than the length from one end of the lamp tube to the other end. Further, the length along the straight line extending from the first end portion of the flexible circuit sheet toward the second end portion on the opposite side of the flexible circuit sheet in the same direction as the direction in which the lamp tube extends is the same as that of the lamp tube. It may be longer than the length along the straight line.

  Referring to FIG. 7, in one embodiment, the LED light strip 2 includes a flexible circuit sheet having a first wiring layer 2a, a dielectric layer 2b, and a second wiring layer 2c in this order. In one example, the thickness of the second wiring layer 2c (for example, the thickness in the direction in which the layers 2a to 2c are stacked) is larger than the thickness of the first wiring layer 2a, and the length of the LED light strip 2 (or the LED light strip 2). Is longer than the length of the lamp tube 1 or two connecting portions at both ends of the lamp tube (for example, a region where the circumference of the lamp tube is narrowed). It is at least longer than the central part of the lamp tube in between. Two independent through-holes 203 and 204 are formed in the end region of the LED light strip 2 that extends beyond the end of the lamp tube 1 where the light source 202 is not disposed. The two wiring layers 2c are electrically connected. In order to avoid short circuit, the through holes 203 and 204 do not communicate with each other.

  In this way, by increasing the thickness of the second wiring layer 2c, the second wiring layer 2c supports the first wiring layer 2a and the dielectric layer 2b, while preventing the LED light from being displaced or deformed. Since the strip 2 can be mounted on the inner peripheral surface, the product yield can be improved. In addition, since the first wiring layer 2a and the second wiring layer 2c are in electrical communication, the circuit layout of the first wiring layer 2a is extended downward to the second wiring layer 2c, and the entire LED light strip 2 is The circuit layout can be reached. Furthermore, since the circuit layout has two layers, the area of each layer and thus the width of the LED light strip 2 can be reduced, and more LED light strips 2 can be introduced into the production line to increase productivity. it can.

  Further, in some embodiments, the first wiring layer 2a and the second wiring layer 2c in the end region of the LED light strip 2 that extends beyond the end of the lamp tube 1 and where the light source 202 is not disposed are used to supply power. The circuit layout of the power supply module can be constructed so that the module can be arranged directly on the flexible circuit sheet of the LED light strip 2.

  When both ends of the LED light strip 2 are separated from the inner surface of the lamp tube 1 and the LED light strip 2 is connected to the power source 5 via wire bonding, some movement occurs during the subsequent transportation, The bonded wire may break. Therefore, the preferred connection method between the LED light strip 2 and the power supply 5 would be soldering (as shown in FIG. 1). Specifically, referring to FIG. 1, both ends of the LED light strip 2 including the flexible circuit sheet are arranged to pass through the reinforced transition portion of the lamp tube and to be directly soldered to the output terminal of the power source 5. Has been. Thereby, the quality of a product can be improved without using a wire and / or wire bonding. As described in this specification, the transition portion of the lamp tube refers to a region outside the central portion of the lamp tube and inside the end portion of the lamp tube. For example, the diameter of the center portion of the lamp tube may be constant, and the diameter of each transition portion between the center portion and the end portion of the lamp tube may vary (for example, at least part of the transition portion may be It may become narrower from the center to the end).

  Referring to FIG. 3, the output terminal of the printed circuit board of power supply 5 is thick enough to later form solder joint “g” (or solder ball “g”) (as also shown in FIG. 1). It may have a soldering pad “a” with a certain amount of solder (eg tin solder). Accordingly, both ends of the LED light strip 2 may have soldering pads “b” (as also shown in FIG. 1). The soldering pad “a” on the output terminal of the printed circuit board of the power supply 5 is soldered to the soldering pad “b” on the LED light strip 2 via tin solder on the soldering pad “a”. . The soldering pad “a” and the soldering pad “b” may face each other during soldering so that the connection between the printed circuit board of the power supply 5 and the LED light strip 2 is the strongest. However, this type of soldering usually heats the tin solder by pressing the thermocompression head against the back side of the LED light strip 2, that is, the LED light strip 2 is sandwiched between the thermocompression head and the tin solder. May cause reliability problems. In some embodiments, through-holes are formed in each soldering pad “b” on the LED light strip 2 so that the soldering pad “b” overlaps the soldering pad “a” without facing it. (Eg, so that both the soldering pad “a” and the soldering pad “b” can have exposed surfaces facing in the same direction), the soldering pad “a” and the soldering pad “ When “b” is arranged vertically, the thermocompression bonding head directly presses the tin solder of the soldering pad “a” on the surface of the printed circuit board of the power supply 5. In this example, the manufacturing process is simplified.

  Referring again to FIG. 3, both ends of the LED light strip 2 away from the inner surface of the lamp tube 1 (as shown in FIG. 7) are free extending ends (as also shown in FIGS. 1 and 7). Although most of the LED light strip 2 is attached to the inner surface of the lamp tube, it is fixed. One free extension end 21 has the soldering pad “b” described above. When assembling the LED straight tube lamp, as shown in FIG. 1, simultaneously with the connection of the printed circuit board of the power source 5 by soldering, the free extension end 21 is wound in a spiral shape so as to fit within the lamp tube as appropriate. , Curl upward or deform. As shown in FIG. 7, when the flexible circuit sheet of the LED light strip 2 includes the first wiring layer 2a, the dielectric layer 2b, and the second wiring layer 2c in this order, the lamp tube in which the light source 202 is not disposed. The connection between the first wiring layer 2a and the second wiring layer 2c is realized by using the free extension end portion 21 which is the end region of the LED light strip 2 extending beyond, and the circuit layout of the power source 5 is adjusted. Can do. As described above, the fixing portion of the LED light strip 2 can be fixed according to the shape of the inner surface of the lamp tube, but the shape of the free extension end portion 21 does not match the shape of the lamp tube. The end portion 21 may be different from the fixed portion. As shown in FIG. 1, the free extension end 21 may be bent away from the lamp tube. For example, there may be a space between the inner surface of the lamp tube and the free extension end 21.

  Referring to FIGS. 5 and 6, in another embodiment, the LED light strip and the power source may be connected using a circuit board assembly 25 configured with a power module 250 rather than the solder joint described above. Good. The circuit board assembly 25 has a long circuit sheet 251 and a short circuit board 253 bonded together, and the short circuit board 252 is adjacent to the side edge of the long circuit sheet 251. The short circuit board 253 may include the power supply module 250 to form a power source. The short circuit board 253 is harder and stronger than the long circuit sheet 251 so that the power supply module 250 can be supported.

  The long circuit sheet 251 may be a flexible circuit sheet of the LED light strip 2 including the wiring layer 2a as shown in FIG. The wiring layer 2a of the LED light strip 2 and the power supply module 250 may be electrically connected in various forms according to actual demand. As shown in FIG. 5, the power module 250 and the long circuit sheet 251 having the wiring layer 2a on the surface are on the same side of the short circuit board 253, and the power module 250 is directly connected to the long circuit sheet 251. It has come to be. Alternatively, as shown in FIG. 6, the power module 250 and the long circuit sheet 251 having the wiring layer 2 a on the surface are on both sides of the short circuit board 253, and the power module 250 is directly connected to the short circuit board 253. In addition, the LED light strip 2 is indirectly connected to the wiring layer 2a through the short circuit board 253.

  The power supply module 250 and the power supply 5 described above may include various elements for supplying power to the LED light strip 2. For example, a power converter for applying power to the LED light strip 2 and other circuit elements may be provided.

  FIG. 4A is a perspective view of an exemplary flexible circuit sheet 200 and a printed circuit board 420 of a power supply 400 soldered together. 4B to 4D are diagrams illustrating an exemplary soldering process between the flexible circuit sheet 200 and the printed circuit board 420 of the power supply 400. In one embodiment, the flexible circuit sheet 200 and the free extension end have the same structure. The free extension end portions are two opposite end portions of the flexible circuit sheet 200 and are used for connection to the printed circuit board 420. The bendable sheet 200 and the power source 400 are electrically connected to each other by soldering. The flexible circuit sheet 200 includes a circuit layer 200a and a circuit protective layer 200c that covers one surface of the circuit layer 200a. Furthermore, the flexible circuit sheet 200 includes two surfaces, a first surface 2001 and a second surface 2002, which face each other. The first surface 2001 is a surface on the circuit layer 200a and at a position away from the circuit protection layer 200c. The second surface 2002 is a surface on the circuit protection layer 200c and at a position away from the circuit layer 200a. Several LED light sources 202 are arranged on the first surface 2001 and are electrically connected to the circuit of the circuit layer 200a. The circuit protection layer 200c is made of, for example, polyimide (PI) that has low thermal conductivity but is useful for circuit protection. The first surface 2001 of the flexible circuit sheet 200 includes a soldering pad “b” (or referred to as a first soldering pad). The solder material “g” can be placed on the soldering pad “b”. In one embodiment, the flexible circuit sheet 200 further comprises a notch “f”. The notch “f” is arranged at the edge of the end of the flexible circuit sheet 200 soldered to the printed circuit board 420 of the power supply 400. In some embodiments, a hole provided near the edge of the end of the flexible circuit sheet 200 may be used instead of the notch. By providing the holes, a contact material is further provided between the printed circuit board 420 and the flexible circuit sheet 200, so that a stronger connection is obtained. The printed circuit board 420 includes a power circuit layer 420a and a soldering pad “a”. In addition, the printed circuit board 420 includes two opposite surfaces, a first surface (or top surface) 421 and a second surface (or bottom surface) 422. The second surface 422 is a layer on the power supply circuit layer 420a. The soldering pad “a” has a first surface 421 (the soldering pad “a” on the first surface 421 may be referred to as a second soldering pad) and a second surface 422 (on the second surface 422), respectively. Soldering pad “a” may be referred to as a third soldering pad). The soldering pad “a” on the first surface 421 corresponds to the soldering pad “a” on the second surface 422. The solder material “g” can be placed on the soldering pad “a”. In one embodiment, the flexible circuit sheet 200 is placed under the printed circuit board 420 in view of soldering stability and automated process optimization (see FIG. 4B for orientation). For example, the first surface 2001 of the flexible circuit sheet 200 is connected to the second surface 422 of the printed circuit board 420. Also, as shown in the figure, the solder material “g” includes the upper surface (for example, the first surface 2001) of the flexible circuit sheet 200, the soldering pad “a”, the soldering pad “b”, and the printed circuit board 420. Can be touched, covered and soldered to the side surface of each end portion of the power supply circuit layer 420a formed on the edge of the printed circuit board 420 and the upper surface of the soldering pad “a” of the upper surface 421 of the printed circuit board 420. In addition, the solder material “g” includes the soldering pad “a”, the soldering pad “b”, the side surface of the power supply circuit layer 420a formed in the hole of the printed circuit board 420, and / or the flexible circuit sheet. 200 holes or notches can be contacted. Accordingly, the solder material forms a hump-like portion that covers a part of the flexible circuit sheet 200 and the printed circuit board 420, and a rod-like portion that penetrates the hole or notch of the printed circuit board 420 and the flexible circuit sheet 200. Also good. These two portions (for example, the hump-shaped portion and the rod-shaped portion) may function as a rivet for maintaining a strong connection between the flexible circuit sheet 200 and the printed circuit board 420.

  As shown in FIGS. 4C and 4D, in an exemplary soldering process between the flexible circuit sheet 200 and the printed circuit board 420, the circuit protective layer 200c of the flexible circuit sheet 200 is supported on the support table prior to soldering. (Ie, the second surface 2002 of the flexible circuit sheet 200 contacts the support table 42). The soldering pad “a” on the second surface 422 of the printed circuit board 420 contacts the soldering pad “b” on the first surface 2001 of the flexible circuit sheet 200. Next, when the heating head 41 presses a part of the solder material “g”, the flexible circuit sheet 200 and the printed circuit board 420 are soldered to each other. During soldering, the soldering pad “b” on the first surface 2001 of the flexible circuit sheet 200 contacts the soldering pad “a” on the second surface 422 of the printed circuit board 420, and the printed circuit board 420. The soldering pad “a” on the first surface 421 contacts the solder material “g” pressed by the heating head 41. In this state, the heat from the heating head 41 is applied to the soldering pad “a” on the first surface 421 of the printed circuit board 420 and the soldering pad “a” on the second surface 422 of the printed circuit board 420. Can be transmitted to the soldering pad “b” on the first surface 2001 of the flexible circuit sheet 200. Since there is no circuit protection layer 200c having a relatively low thermal conductivity between the heating head 41 and the circuit layer 200a, heat transfer between the heating head 41 and the soldering pads “a” and “b” It is not affected by the protective layer 200c. As a result, the efficiency and stability related to the connection and soldering process of the soldering pads “a” and “b” of the printed circuit board 420 and the flexible circuit sheet 200 can be improved.

  As shown in the exemplary embodiment of FIG. 4C, the printed circuit board 420 and the flexible circuit sheet 200 are firmly connected to each other by a solder material “g”. In FIG. 4C, the components between the imaginary line M and the imaginary line N drawn from top to bottom are the solder pads “a” on the first surface 421 of the printed circuit board 420, the power circuit layer 420a, A soldering pad “a” on the second surface 422 of the printed circuit board 420, a soldering pad “b” on the first surface 2001 of the flexible circuit sheet 200, and a circuit layer 200a of the flexible circuit sheet 200. The circuit protective layer 200c of the flexible circuit sheet 200. The connection between the printed circuit board 420 and the flexible circuit sheet 200 is strong and stable. As described above, the solder material “g” may swell higher than the soldering pad “a” on the first surface 421 of the printed circuit board 420, and may fill other spaces.

  In other embodiments, yet another circuit protection layer (eg, PI layer) can be disposed over the first surface 2001 of the circuit layer 200a. For example, the circuit layer 200a may be sandwiched between two circuit protection layers, and the first surface 2001 of the circuit layer 200a can be protected by the circuit protection layer. A part of the circuit layer 200a (the part having the soldering pad “b”) is exposed to be connected to the soldering pad “a” of the printed circuit board 420. The other part of the circuit layer 200 a is exposed from the other circuit protection layer and can be connected to the LED light source 202. In this state, a part of the bottom of each LED light source 202 contacts the circuit protection layer on the first surface 2001 of the circuit layer 200a, and another part of the bottom of the LED light source 202 contacts the circuit layer 200a. ing.

  According to the exemplary embodiment shown in FIGS. 4A-4D, the printed circuit board 420 includes a through hole “h” that passes through the soldering pad “a”. In the automatic soldering process, as the heating head 41 automatically presses the printed circuit board 420, the heating head 41 pushes the solder material “g” on the soldering pad “a” into the through hole “h”. be able to. As a result, a solder connection is formed as shown in FIGS. 4C and 4D.

  FIG. 8A is a block diagram of a system that includes an LED straight tube lamp that includes a power supply module according to certain embodiments. Referring to FIG. 8A, an AC power source 508 is used to supply an AC supply signal, and may be an AC power transmission line having a rated voltage of 100 to 277 V and a rated frequency of 50 Hz or 60 Hz, for example. When the lamp drive circuit 505 receives an AC supply signal from the AC power supply 508, the lamp drive circuit 505 converts it into an AC drive signal. The power supply module and the power supply 508 described above may include various elements for providing power to the LED light strip 2. For example, you may provide the power converter which supplies electric power to the LED light strip 2, and another circuit element. In some embodiments, the power supply 508 and the lamp drive circuit 505 are outside the LED straight tube lamp. For example, the lamp driving circuit 505 may be a part of a lamp socket or a lamp holder into which an LED straight tube lamp is inserted. The lamp driving circuit 505 may be an electronic ballast and may be used to convert a commercial power signal into a high frequency, high voltage AC driving signal. Common types of electronic ballasts such as instant start electronic ballasts, program start electronic ballasts, and quick start electronic ballasts can be applied to LED straight tube lamps. In some embodiments, the voltage of the AC drive signal is higher than 300V, in some embodiments 400-700V at frequencies above 10 kHz, and in some embodiments 400-700V at frequencies 20-50 kHz. When the LED straight tube lamp 500 receives an AC drive signal from the lamp drive circuit 505, it is driven to emit light. In the present embodiment, the LED straight tube lamp 500 is in a driving environment in which power is supplied by one end cap having two conductor pins 501 and 502 used to receive an AC driving signal. The two conductor pins 501 and 502 are directly or indirectly connected to the lamp driving circuit 505.

  In some embodiments, the lamp drive circuit 505 may be omitted and is drawn with a dotted line. In certain embodiments, if the lamp drive circuit 505 is omitted, the AC power supply 508 is directly coupled to the pins 501 and 502 so that these pins receive the AC supply signal as an AC drive signal.

  In some embodiments, the LED straight tube lamp may be powered by two end caps each having two conductor pins. These conductor pins are connected to the lamp driving circuit so as to simultaneously receive the AC driving signal. However, in certain embodiments, referring to FIG. 8B, each end cap of LED straight tube lamp 500 may have only one conductor pin for receiving an AC drive signal. For example, in order to conduct electricity to both ends of the LED straight tube lamp, it is not necessary to have two conductor pins in each end cap. Compared with FIG. 8A, the conductor pins 501 and 502 in FIG. 8B are configured to correspond to both end caps of the LED straight tube lamp 500, and the AC power source 508 and the lamp driving circuit 505 are the same as those described above. is there.

  FIG. 8C is a block diagram of an LED lamp according to an embodiment. Referring to FIG. 8C, the LED lamp power supply module includes a rectifier circuit 510 and a filter circuit 520, and may further include some parts of the LED lighting module 530. The rectifier circuit 510 is connected to the two pins 501 and 502, receives a driving signal from the outside, and rectifies it, thereby outputting a rectified signal from the two rectified output terminals 511 and 512. In some embodiments, the external drive signal may be an AC drive signal or an AC supply signal described with reference to FIGS. 8A and 8B. In some embodiments, the external drive signal may be a direct current signal, in which case the LED straight tube lamp may not be changed. Filter circuit 520 is coupled to the rectifier circuit for filtering the rectified signal to generate a filter signal. As an example, the filter circuit 520 is connected to the rectifier circuit output terminals 511 and 512 to receive the rectified signal and apply the filter to output the filter signal from the two output terminals 521 and 522. The LED lighting module 530 is coupled to the filter circuit 520 and receives a filter signal for emitting light. As an example, the LED lighting module 530 includes a circuit coupled to the filter output terminals 521 and 522 for driving a LED unit (not shown) in the LED lighting module 530 to emit light by receiving the filter signal. May be. Details of these operations are described below based on a particular embodiment.

  In the embodiments of these drawings, there are two rectified output terminals 511 and 512 and two filter output terminals 521 and 522. In practice, however, the rectifier circuit 510, the filter circuit 520, and the LED lighting module 530 are connected. The number of ports or terminals to be connected may be one or more depending on the necessity of signal transmission between circuits or devices.

  In addition, the LED lamp power module described in FIG. 8C and the LED lamp power module embodiments described below may be used in the LED straight tube lamp 500 of FIGS. 8A and 8B, respectively. Any other kind of LED lighting structure with two conductor pins used to transfer power, for example bulb-shaped LED lighting, personal area lights (PAL), (PL-S, PL-D, PL You may use with the plug-in type LED lamp etc. from which the kind of base (such as -T and PL-L) differs. Furthermore, the electric shock protection effect may be enhanced by implementing the present invention on a bulb-shaped LED illumination in combination with the structure disclosed in International Publication No. 2016/045631.

  FIG. 9 is a schematic diagram of a rectifier circuit according to an embodiment. Referring to FIG. 9, the rectifier circuit 610, ie, the bridge rectifier, includes four rectifier diodes 611, 612, 613, 614 configured to full-wave rectify the received signal. Diode 611 has an anode connected to output terminal 512 and a cathode connected to pin 502. Diode 612 has an anode connected to output terminal 512 and a cathode connected to pin 501. Diode 613 has an anode connected to pin 502 and a cathode connected to output terminal 511. Diode 614 has an anode connected to pin 501 and a cathode connected to output terminal 511.

  When the pins 501 and 502 receive the AC signal, the rectifier circuit 610 performs the following operation. During the positive half cycle of the connected AC signal, the AC signal is sequentially input to the pin 501, the diode 614, and the output terminal 511, and then passes through the output terminal 512, the diode 611, and the pin 502 in order. During the negative half cycle of the connected AC signal, the AC signal is sequentially input to the pin 502, the diode 613, and the output terminal 511, and then passes through the output terminal 512, the diode 612, and the pin 501 in order. Therefore, during the entire period of the connected AC signal, the positive terminal of the rectified signal generated by the rectifier circuit 610 continues at the output terminal 511 and the negative terminal of the rectified signal continues at the output terminal 512. Therefore, the rectified signal generated or output by the rectifier circuit 610 is a full-wave rectified signal.

  When the pins 501 and 502 are connected to a DC power source to receive a DC signal, the rectifier circuit 610 performs the following operation. When the pin 501 is connected to the positive terminal of the DC power source and the pin 502 is connected to the negative terminal of the DC power source, a DC signal is sequentially input to the pin 501, the diode 614, and the output terminal 511, and then the output terminal 512, the diode 611, The signals are output through the pins 502 in order. When the pin 501 is connected to the negative terminal of the DC power source and the pin 502 is connected to the positive terminal of the DC power source, a DC signal is sequentially input to the pin 502, the diode 613, and the output terminal 511, and then the output terminal 512, the diode 612, The signals are output through the pins 501 in order. Therefore, even if the electrical polarity of the DC signal changes between the pins 501 and 502, the positive terminal of the rectified signal generated by the rectifier circuit 610 remains the output terminal 511 and the negative terminal of the rectified signal remains the output terminal 512. It is.

  Therefore, the rectifier circuit 610 in this embodiment can output or generate an appropriate rectified signal regardless of whether the received input signal is an AC signal or a DC signal.

  FIG. 10A is a block diagram of a filter circuit according to an embodiment. Although the rectifier circuit 510 is shown in FIG. 10A, this diagram is for explaining the connection between the rectifier circuit and other components, and does not mean that the filter circuit 520 includes the rectifier circuit 510. Referring to FIG. 10A, the filter circuit 520 includes a filter unit 523 that is connected to two rectification output terminals 511 and 512 and receives and removes the ripple of the rectification signal from the rectification circuit 510. Therefore, the waveform of the filtered signal is smoother than the waveform of the rectified signal. The filter circuit 520 is further between the rectifier circuit and the corresponding pin, for example, between the rectifier circuit 510 and the pin 501, the rectifier circuit 510 and the pin 502, the rectifier circuit 540 and the pin 503, and / or between the rectifier circuit 540 and the pin 504. A separate filter unit 524 coupled to the other may be provided. The filter unit 524 is used for filtering of a specific frequency, for example, removing a specific frequency of an external drive signal. In the present embodiment, the filter unit 524 is connected between the rectifier circuit 510 and the pin 501. The filter circuit 520 is further rectified between any of the pins 501 and 502 and any of the diodes of the rectifier circuit 510 or between any of the pins 503 and 504 to reduce or eliminate electromagnetic interference (EMI). There may be another filter unit 525 coupled between any of the diodes of circuit 540. In this embodiment, the filter unit 525 is connected between the pin 501 and one of the diodes of the rectifier circuit 510 (not shown in FIG. 10A). The filter units 524 and 525 may be present depending on the actual use situation, or may be omitted, and therefore are drawn with dotted lines in FIG. 10A.

  FIG. 10B is a schematic diagram of a filter unit according to an embodiment. Referring to FIG. 10B, the filter unit 623 includes a capacitor 625 having one end connected to the output terminal 511 and the filter output terminal 521, and the other end connected to the output terminal 512 and the filter output terminal 522. The rectified signals from 511 and 512 are configured to be low-pass filtered, thereby removing the high frequency components of the rectified signals and outputting the filter signals from the filter output terminals 521 and 522.

  FIG. 10C is a schematic diagram of a filter unit according to an embodiment. Referring to FIG. 10C, the filter unit 723 includes a pi-type filter circuit including a capacitor 725, an inductor 726, and a capacitor 727. As is well known, the shape and structure of a pi-type filter circuit is similar to the symbol “π”. Capacitor 725 has one end connected to output terminal 511 and connected to filter output terminal 521 via inductor 726, and the other end connected to output terminal 512 and filter output terminal 522. The inductor 726 is connected between the output terminal 511 and the filter output terminal 521. Capacitor 727 has one end connected to filter output terminal 521 and connected to output terminal 511 via inductor 726 and the other end connected to output terminal 512 and filter output terminal 522.

  As seen between the output terminals 511 and 512 and between the filter output terminals 521 and 522, the filter unit 723 further includes an inductor 726 and a capacitor 727 compared to the filter unit 623 of FIG. 10B. These perform the same low pass filtering function as capacitor 725. Therefore, compared with the filter unit 623 of FIG. 10B, the filter unit 723 of this embodiment has a higher ability to remove a high-frequency component and output a filter signal having a smoother waveform.

  For example, in some embodiments, a value in the range of approximately 10 nH to 10 mH is selected as the inductance value of the inductor 726 of the above embodiment. As the capacitance values of the capacitors 625, 725, and 727 in the above embodiment, for example, in some embodiments, a value in the range of approximately 100 pF to 1 uF is selected.

  FIG. 11A is a schematic diagram of an LED module according to an embodiment. Referring to FIG. 11A, the LED module 630 includes an anode connected to the filter output terminal 521 and a cathode connected to the filter output terminal 522, and includes at least one LED unit 632 such as the light source described above. Yes. When two or more LED units are provided, they are connected in parallel. The anode of each LED unit 632 is connected to the anode of the LED module 630 and connected to the filter output terminal 521, and the cathode of each LED unit 632 is connected to the cathode of the LED module 630 and connected to the filter output terminal 522. Each LED unit 632 includes at least one LED 631. When the LED unit 632 includes a plurality of LEDs 631, the plurality of LEDs 631 are connected in series, the anode of the first LED 631 is connected to the anode of the LED unit 632, and the cathode of the first LED 631 is connected to the next or second LED 631. The The anode of the last LED 631 of the LED unit 632 is connected to the cathode of the previous LED 631, and the cathode of the last LED 631 is connected to the cathode of the LED unit 632.

  In some embodiments, the LED module 630 may generate a current detection signal S531 that is used to control or detect the LED module 630 that represents the magnitude of the current flowing through the LED module 630.

FIG. 11B is a schematic diagram of an LED module according to an exemplary embodiment. Referring to FIG. 11B, the LED module 630 includes an anode connected to the filter output terminal 521 and a cathode connected to the filter output terminal 522, and includes at least two LED units 732. Is connected to the anode of the LED module 630, and the cathode of each LED unit 732 is connected to the cathode of the LED module 630. Each LED unit 732 includes at least two LEDs 731 connected in the same manner as described in FIG. 11A. For example, the anode of the first LED 731 of the LED unit 732 is connected to the anode of the LED unit 732, the cathode of the first LED 731 is connected to the anode of the next or second LED 731, and the cathode of the last LED 731 is the LED unit 732. Connected to the cathode. Further, in the present embodiment, the plurality of LED units 732 in the LED module 630 are connected to each other. If n is a positive integer, the anodes and cathodes of the nth LED in each unit are connected between the plurality of LED units 732 as shown in FIG. 11B (but not limited to). Thus, all the nth LEDs are connected. Thus, the LEDs of the LED module 630 of this embodiment are connected in a mesh shape.

  In some embodiments, the LED lighting module 530 in the above embodiment includes an LED module 630 but does not include a drive circuit for the LED module 630.

  In addition, the LED module 630 of the present embodiment may generate a current detection signal S531 used for control or detection of the LED module 630 that represents the magnitude of the current flowing through the LED module 630.

  In some embodiments, the number of LEDs included in the LED unit 732 may be in the range of 15-25, and in some embodiments may be in the range of 18-22.

  FIG. 11C is a plan view of a circuit layout of the LED module according to the embodiment. Referring to FIG. 11C, in the present embodiment, a description will be given as follows assuming that a plurality of LEDs 831 are connected in the same manner as described in FIG. 11B and three LED units are in the LED module 630. The positive electrode conductive line 834 and the negative electrode conductive line 835 receive a drive signal for supplying power to the LED 831. For example, the positive conductive line 834 may be connected to the filter output terminal 521 of the filter circuit 520 and the negative conductive line 835 may be connected to the filter output terminal 522 of the filter circuit 520 to receive the filter signal. For convenience of explanation, in FIG. 11C, the n-th LEDs 831 of each of the three related LED units are grouped together to form an LED set 833.

  As shown in the leftmost LED set 833 in FIG. 11C, the positive conductive line 834 connects the three first LEDs 831 of the three leftmost related LED units, that is, connects the left anodes of the three first LEDs 831. As shown in the rightmost LED set 833 in FIG. 11C, the negative electrode conductive line 835 connects the three final LEDs 831 of the corresponding three rightmost LED units, that is, connects the right cathode of the three final LEDs 831. . The cathodes of the three first LEDs 831, the anodes of the three final LEDs 831, and the anodes and cathodes of all the other LEDs 831 are connected by a conductive line or conductive part 839.

  For example, the anodes of the three LEDs 831 in the leftmost LED set 833 may be connected together by the positive conductive line 834 and the cathodes may be connected collectively by the leftmost conductive part 839. The anodes of the three LEDs 831 in the second LED set 833 from the left end are also connected together by the conductive portion 839 at the left end, and the cathodes are connected together by the second conductive portion 839 from the left end. Since the cathodes of the three LEDs 831 of the leftmost LED set 833 and the anodes of the three LEDs 831 of the second LED set 833 from the leftmost are connected together by the same leftmost conductive portion 839, the first LED 831 of each of the three LED units is connected. Is connected to the anode of the next second LED 831. The other LEDs 831 are similarly connected. Therefore, all the LEDs 831 of the three LED units are connected in a mesh shape as shown in FIG. 11B.

  In this embodiment, the length 836 of the portion connected to the anode of the LED 831 in each conductive portion 839 is shorter than the length 837 of the portion connected to the cathode of the LED 831 which is another portion of each conductive portion 839. Thereby, the area of the part connected to the cathode becomes larger than the area of the part connected to the anode. Further, the length 837 is shorter than the length 838 of each conductive portion 839 connecting the cathode of one LED 831 in one LED set 833 and the anode of the next LED 831 in the adjacent LED set 833. Thereby, the area of the part which connects a cathode and an anode among each electroconductive part 839 becomes larger than the area of the part connected only to the cathode or anode of LED831 in the part other than that of each electroconductive part 839. Due to such a difference in length and a difference in area, this layout structure improves the heat dissipation of the LED 831.

  In some embodiments, the positive conductive wire 834 includes a longitudinal portion 834a and the negative conductive wire 835 includes a longitudinal portion 835a. Since these longitudinal portions are conductive, as shown in FIG. 11C, each end of the LED module has a positive (+) connection portion and a negative (−) connection portion. With such a layout structure, for example, any other circuit included in the power supply module of the LED lamp, such as the filter circuit 520 and the rectifier circuits 510 and 540, can be connected to the positive connection portion and / or the negative connection at both ends of the LED lamp. It becomes possible to connect to the LED module via the unit. Therefore, this layout structure increases the degree of freedom when the circuit is actually arranged on the LED lamp.

  FIG. 11D is a plan view of a circuit layout of an LED module according to another embodiment. Referring to FIG. 11D, in this embodiment, a plurality of LEDs 931 are connected in the same manner as described in FIG. 11A, and three LED units each including seven LEDs 931 are in LED module 630. It explains as follows. The positive conductive line 934 and the negative conductive line 935 receive a drive signal for supplying power to the LED 931. For example, the positive conductive line 934 may be connected to the filter output terminal 521 of the filter circuit 520 and the negative conductive line 935 is connected to the filter output terminal 522 of the filter circuit 520 to receive the filter signal. For convenience of illustration, in FIG. 11D, all seven LEDs 931 of each of the three LED units are collectively referred to as an LED set 932. Thus, there are three LED sets 932 corresponding to the three LED units.

  The positive electrode conductive line 934 connects the anodes on the left side of the first or leftmost LED 931 of each of the three LED sets 932. The negative electrode conductive line 935 connects the anodes on the right side of the last or rightmost LED 931 of each of the three LED sets 932. In each LED set 932, the left LED 931 among two adjacent LEDs 931 has a cathode connected to the anode of the right LED 931 by a conductive portion 939. With such a layout, the LEDs 931 of each LED set 932 are connected in series.

  In some embodiments, a conductive portion 939 may be used to connect the anode and cathode of two successive LEDs 931, respectively. The negative electrode conductive line 935 connects the cathodes of the last or rightmost LED 931 of each of the three LED sets 932. The positive conductive line 934 connects the anodes of the first or leftmost LEDs 931 of each of the three LED sets 932. Therefore, as shown in FIG. 11D, the length of the conductive portion 939 is longer than the length of the portion of the negative electrode conductive wire 935 connected to the cathode, and the length of the portion connected to the cathode is the positive electrode conductive wire. It is longer than the length of the portion of 934 connected to the anode. For example, the length 938 of the conductive portion 939 is longer than the length 937 of the portion of the negative electrode conductive line 935 connected to the cathode of the LED 931, and the length 937 of the portion connected to the cathode is equal to the length of the positive electrode conductive wire 934. Of these, the length of the portion connected to the anode of the LED 931 is longer than 936. With such a layout structure, the heat dissipation of the LED 931 of the LED module 630 is improved.

  The positive electrode conductive wire 934 includes a longitudinal portion 934a, and the negative electrode conductive wire 935 includes a longitudinal portion 935a. Since these longitudinal portions are conductive, as shown in FIG. 11D, a positive ( A +) connection part and a negative (-) connection part are provided. With such a layout structure, for example, any other circuit included in the power supply module of the LED lamp, such as the filter circuit 520 and the rectifier circuits 510 and 540, can be connected to the positive connection portion and / or the negative connection portion at both ends of the LED lamp. It becomes possible to connect to the LED module via Therefore, this layout structure increases the degree of freedom when the circuit is actually arranged on the LED lamp.

  Further, the circuit layout as shown in FIGS. 11C and 11D may be implemented using a flexible circuit sheet or substrate, and depending on its specific definition, may even be referred to as a flexible circuit board. For example, the flexible circuit sheet includes the positive electrode conductive wire 834, the positive electrode longitudinal portion 834a, the negative electrode conductive wire 835, the negative electrode longitudinal portion 835a, and the conductive portion 839 shown in FIG. 11C, the positive electrode conductive wire 934 shown in FIG. The positive electrode longitudinal portion 934a, the negative electrode conductive wire 935, the negative electrode longitudinal portion 935a, and the conductive portion 939 may include one conductive layer formed by an etching method.

  FIG. 11E is a plan view of a circuit layout of an LED module according to another embodiment. The layout structure of the LED module of FIGS. 11E and 11C corresponds to the connection method similar to the connection method of the LED 831 shown in FIG. 11B. However, in order to form the circuit layout shown in FIG. Whereas only one is used, the layout structure of FIG. 11E includes two conductive layers. Referring to FIG. 11E, the main difference from the layout of FIG. 11C is that the positive electrode conductive line 834 and the negative electrode conductive line 835 have a longitudinal portion 834a and a longitudinal portion 835a formed in the second conductive layer, respectively. is there. This difference is described in detail below.

  In certain embodiments, referring again to FIG. 7 at the same time, the flexible circuit sheet of the LED module comprises a first conductive layer 2a and a second conductive layer 2c that are electrically insulated from each other by a dielectric layer 2b. Yes. Of the two conductive layers, the positive electrode conductive line 834, the negative electrode conductive line 835, and the conductive portion 839 in FIG. 11E are first meshed, for example, by an etching method in order to electrically connect the plurality of LED components 831. It is formed on the conductive layer 2a. On the other hand, the positive electrode longitudinal portion 834a and the negative electrode longitudinal portion 835a are formed in the second conductive layer 2c by etching in order to electrically connect the filter circuit (filter output terminal thereof). Further, for connection to the second conductive layer 2c, the positive conductive line 834 of the first conductive layer 2a has a plurality of via points 834b, and the negative conductive line 835 of the first conductive layer 2a has a plurality of via points 835b. ing. The positive electrode longitudinal portion 834a of the second conductive layer 2c has a plurality of via points 834c, and the negative electrode longitudinal portion 835a of the second conductive layer 2c has a plurality of via points 835c. The via point 834b is provided at a position corresponding to the via point 834c in order to connect the positive electrode conductive line 834 and the positive electrode longitudinal portion 834a. The via point 835b is provided at a position corresponding to the via point 835c in order to connect the negative electrode conductive line 835 and the negative electrode longitudinal portion 835a. An exemplary desirable method of connecting these two conductive layers 2a and 2c includes a hole connecting each via point 834b to a corresponding via point 834c, and a hole connecting each via point 835b to a corresponding via point 835c. It is formed so as to extend through the two conductive layers 2a and 2c and the dielectric layer 2b interposed therebetween. The positive electrode conductive wire 834 and the positive electrode longitudinal portion 834a can be electrically connected by welding a metal component into the one or more connection holes. The negative electrode conductive wire 835 and the negative electrode longitudinal portion 835a Can be electrically connected by welding metal parts into the one or more connection holes.

  Similarly, in the layout structure of the LED module of FIG. 11D, instead of the above, a positive electrode longitudinal portion 934a and a negative electrode longitudinal portion 935a may be arranged in the second conductive layer to constitute a two-layer layout structure.

  A positive conducting wire (834 or 934) is provided between two terminals at both ends thereof and between these terminals at both ends to contact and / or supply power to the LED (for example, the anode of the LED). A plurality of pads, and long conductive wires extending along the length of the LED light strip, and wire portions that electrically connect terminals at both ends to the plurality of pads. . Similarly, the negative conductive line (835 or 935) is provided between two terminals provided at both ends thereof, and between these terminals at both ends, and is in contact with an LED (for example, the cathode of the LED) and / or power to the LED. A plurality of pads for supplying the light, and a long conductive wire extending along the length of the LED light strip, the wire portion electrically connecting terminals at both ends to the plurality of pads. Also good.

  Such a circuit layout may be implemented for any of the exemplary LED light strips described above to function as a circuit board or sheet for the LED light strip on which the LED light source is disposed.

  In the description of the present specification, the LED unit refers to one LED row composed of a plurality of LEDs arranged in series, and the LED module refers to a single LED unit or (for example, arranged in parallel). A) A plurality of LED units connected to the same two nodes. For example, the LED light strip 2 may be an LED module and / or an LED unit.

  In some embodiments, the thickness of the second conductive layer of the flexible circuit sheet having a two-layer structure is reduced to reduce a voltage drop or loss along each of the positive electrode longitudinal portion and the negative electrode longitudinal portion disposed in the second conductive layer. In some embodiments, the thickness is greater than the thickness of the first conductive layer. Compared with the single-layer flexible circuit sheet, the positive electrode longitudinal portion and the negative electrode longitudinal portion are disposed in the second conductive layer in the two-layer flexible circuit sheet. The width (between two longitudinal sides) has been reduced or can be reduced. The maximum number of narrow flexible circuit sheets that can be placed together is greater than the maximum number of flexible circuit sheets that can be placed together if they are on the same fixture or plate in the production process. Therefore, the production efficiency of the LED module can be increased by adopting a narrow flexible circuit sheet. And since the two-layer flexible circuit sheet has a higher shape retention, the reliability in the production process such as the accuracy of the welding position when welding (material) to the LED component can also be improved.

  As a variation of the above embodiment, certain exemplary LED straight tube lamps are provided in which at least some of the electronic components of the power supply module are arranged on the light strip of the LED straight tube lamp. For example, at least some of the electronic components may be placed on the LED light strip using printed electronic circuit (PEC) technology (as opposed to, for example, a separate circuit board connected to the LED light strip). Can be printed, inserted, or embedded.

  In one embodiment, all the electronic components of the power module are located on the light strip. This production process includes or proceeds along the following steps. Circuit board preparation (for example, flexible printed circuit board preparation) step, metal nano-ink inkjet printing step, active and passive component inkjet printing step (for power supply module), drying / sintering step, interlayer bump inkjet Printing step, insulating ink jetting step, metal nanoink ink jet printing step, active component and passive component ink jet printing step (to sequentially form the included layers), surface bond pad jetting step (s), And a solder resist spraying step for the LED component. However, the production process may be different, and as a result, all electronic components or parts of the power supply module may be placed directly on the LED light strip.

  In certain embodiments, when all the electronic components of the power supply module are placed on the LED light strip, the terminal pins of the LED straight tube lamp are connected to the conductive wires welded to both ends of the light strip, thereby connecting the terminals. An electrical connection between the pin and the light strip may be achieved. In this case, since a separate substrate for supporting the power supply module is not required, there is room for improvement in the design and arrangement of the end cap (one or both) of the LED straight tube lamp. In some embodiments, the power module (parts) is placed at both ends of the light strip to significantly reduce the effect on the LED parts of the heat generated by the operation of the power module. In this case, since it is not necessary to use a substrate other than the light strip to support the power supply module, the total amount of welding or soldering can be greatly reduced, and the overall reliability of the power supply module can be improved.

  As an alternative, some of the power module's all electronic components such as resistors and / or small capacitors are printed on the light strip, and larger components such as inductors and / or electrolytic capacitors are the end cap (s). Placed in. The light strip production process in this case may be the same as described above. Also, in this case, placing some of the electronic components on the light strip leads to a rational layout of the power supply module in the LED straight tube, which may also improve the end cap design. unknown.

  As a modification of the above embodiment, the components may be placed on the LED light strip by embedding or inserting, for example, embedding the electronic components of the power supply module on a flexible or flexible light strip. In some embodiments, this embedding method is a method using copper-clad laminates (CCL) to form resistors and capacitors to embed passive components, silk screen printing related It may be achieved by ink-based methods or by ink-jet printing in which ink is directly printed using an ink-jet printer to build passive elements and related functions at intended locations on the light strip. Thereafter, a light strip embedded with passive components is formed through treatment with ultraviolet light (UV) or drying / sintering. The electronic component embedded on the light strip includes, for example, a resistor, a capacitor, an inductor, and the like. In other embodiments, active components may also be embedded. By embedding some components on the light strip, the surface area of the printed circuit board used to support the power module components is reduced or reduced, so that the printed circuit board for carrying the power module components. Since the size, weight, and thickness of the module are reduced or reduced, a rational layout of the power supply module is possible, leading to an improvement in the design of the end cap. Also, in this situation, if the weld point on the printed circuit board for welding the resistor and / or capacitor is not placed on the light strip, such a weld point will naturally not be used, so Considering that there is a high possibility of causing (causing or inviting) a defect, malfunction, or failure, the reliability of the power supply module is improved. In addition, the length of the conductive lines required to connect the components to the printed circuit board is also reduced, so the layout of the components on the printed circuit board can be made more compact and the functionality of these components can be reduced. Can be increased.

  Next, a method for manufacturing the embedded capacitor and the resistor will be described below.

  Usually, in the manufacturing method of the embedded capacitor, the concept of distributed capacitance or planar capacitance is used or necessary. The manufacturing process includes the following steps. An ultrathin insulating layer is affixed or pressed onto a substrate made of a copper layer, and is generally disposed between two layers consisting of a power supply conductor layer and a ground layer. Due to the extremely thin insulating layer, the distance between the power supply conductor layer and the ground layer becomes very short. The capacity obtained by such a structure can also be realized by conventional plating through-hole technology. Basically, this step is used to make this structure with large parallel plate capacitors on a circuit board.

  Among products with high electric capacity, there are products that use distributed capacitance, and products that use individual embedded capacitance. High electrical capacitance is achieved by applying or adding a high dielectric constant material such as barium titanate to the insulating layer.

  In a typical method for manufacturing a buried resistor, a conductive or electrically resistive adhesive is used. Examples of such an adhesive include a resin to which conductive carbon or graphite that can also be used as an adhesive or a filler is added. The added resin is silk-screen printed at the target location, and after processing, is laminated in the circuit board. The resistance thus formed is connected to another electronic component through a plated through hole or a micro via. Another method is called omega ply, which builds a layered resistance against the substrate by a two-layer metal layer structure consisting of a copper layer and a thin layer of nickel alloy. Next, another type of nickel alloy resistor having a copper terminal can be formed by etching the copper layer and the nickel alloy layer. Each of these types of resistors is laminated into a circuit board.

  In one embodiment, conductive (distribution) lines are printed directly on a linear layout on the inner surface of a glass LED straight tube lamp, and LED components are affixed directly on the inner surface and electrically connected by conductive lines. The In some embodiments, the chip-shaped LED component is directly attached so as to overlap the conductive line on the inner surface, and a connection point is placed at the end of the wiring connecting the LED component and the power supply module. After pasting, fluorescent powder may be applied or dripped onto the LED chip in order to generate white or another color light by operating the LED straight tube lamp.

  In some embodiments, the luminous efficiency of the LED or LED component is 80 lm / W or higher, and in some embodiments, 120 lm / W or higher. In a more optimal specific embodiment, an LED or LED component having a luminous efficiency of 160 lm / W or more may be provided. In the present invention, the white light emitted by the LED component may be generated by mixing the monochromatic light emitted by the monochromatic LED chip and the fluorescent powder. The dominant wavelengths in this white light spectrum are in the range of 430-460 nm and 550-560 nm, or in the range of 430-460 nm, 540-560 nm, and 620-640 nm.

  FIG. 12A is a block diagram of a power module of an LED lamp according to an embodiment. As shown in FIG. 12A, the LED lamp power supply module includes a rectifier circuit 510 and a filter circuit 520, and may further include some parts of the LED lighting module 530. The LED illumination module 530 in this embodiment includes a drive circuit 1530 and an LED module 630. The drive circuit 1530 includes a DC-DC converter circuit, is connected to the filter output terminals 521 and 522, receives a filter signal, and then performs power conversion for converting the filter signal into a drive signal at the drive output terminals 1521 and 1522. . The LED illumination module 630 is connected to the drive output terminals 1521 and 1522 and receives a drive signal for light emission. In some embodiments, the current of the LED module 630 is stable at the target current value. The description of the LED module 630 is the same as the description made with reference to FIGS.

  In some embodiments, the LED lighting module 530 shown in FIG. 8C may include a drive circuit 1530 and an LED module 630 as shown in FIG. 12A. Therefore, the LED lamp power supply module according to the present embodiment can be applied to a single-ended power supply structure such as a bulb-type LED lighting and a personal area lighting (PAL).

  FIG. 12B is a block diagram of a drive circuit according to an embodiment. Referring to FIG. 12B, the drive circuit includes a controller 1531 and a conversion circuit 1532 for power conversion based on a current source for driving the LED module to emit light. The conversion circuit 1532 includes a switch circuit 1535 and an energy storage circuit 1538. The conversion circuit 1532 receives the filter signal coupled to the filter output terminals 521 and 522, and drives the filter signal at the drive output terminals 1521 and 1522 to drive the LED module under the control of the controller 1531. Convert to Under the control of the controller 1531, the drive signal output to the conversion circuit 1532 provides stable power, so that the LED module can emit stable light.

  FIG. 12C is a schematic diagram of a drive circuit according to an embodiment. Referring to FIG. 12C, the drive circuit 1630 in this embodiment includes a step-down DC-DC converter circuit having a controller 1631 and a converter circuit. The converter circuit includes an inductor 1632, a diode 1633 for current “freewheeling”, a capacitor 1634, and a switch 1635. The drive circuit 1630 is connected to the filter output terminals 521 and 522, receives the filter signal, and converts the received filter signal into a drive signal for driving the LED module connected between the drive output terminals 1521 and 1522.

  In the present embodiment, the switch 1635 includes a metal oxide semiconductor field effect transistor (MOSFET), a first terminal connected to the anode of the freewheeling diode 1633, and a second terminal connected to the filter output terminal 522. , And a control terminal connected to a controller 1631 used for controlling current conduction or current interruption between the first terminal and the second terminal of the switch 1635. The drive output terminal 1521 is connected to the filter output terminal 521, the drive output terminal 1522 is connected to one end of the inductor 1632, and the other end of the inductor 1632 is connected to the first terminal of the switch 1635. Capacitor 1634 is coupled between drive output terminals 1521 and 1522 to stabilize the voltage between drive output terminals 1521 and 1522. Freewheeling diode 1633 has a cathode connected to drive output terminal 1521.

  Next, an exemplary operation of the drive circuit 1630 will be described.

  The controller 1631 is configured to determine the timing at which the switch 1635 is turned on (conductive state) or turned off (cut off state) in accordance with the current detection signal S535 and / or the current detection signal S531. For example, in some embodiments, the controller 1635 is configured to control the on / off duty ratio of the switch 1635 to adjust the size of the drive signal. The current detection signal S535 represents the magnitude of the current flowing through the switch 1635. The current detection signal S531 represents the magnitude of the current flowing through the LED module connected between the drive output terminals 1521 and 1522. For example, the controller 1631 may control the duty ratio between ON and OFF of the switch 1635 based on the magnitude of the current detected based on the current detection signal S531 or S535. Thus, if the magnitude of the current is greater than the threshold, the switch may be turned off (cut off) for a longer time, and if the magnitude of the current is less than the threshold, the switch is turned on (conducted) for a longer time. May be. In accordance with either the current detection signal S535 or the current detection signal S531, the controller 1631 can obtain information on the magnitude of the power converted by the converter circuit. When the switch 1635 is turned on, the current of the filter signal is input through the filter output terminal 521, flows through the capacitor 1634, the drive output terminal 1521, the LED module, the inductor 1632, and the switch 1635, and then is output from the filter output terminal 522. . In this way, during the current flow, the capacitor 1634 and the inductor 1632 accumulate energy. On the other hand, when the switch 1635 is switched off, a current flows from the freewheeling diode 1633 to the drive output terminal 1521, and the LED module continues to emit light, whereby the capacitor 1634 and the inductor 1632 release the stored energy.

  In some embodiments, the capacitor 1634 is an optional element and may be omitted and is therefore drawn with a dotted line in FIG. 12C. In some application environments, it is possible to achieve the effect of stabilizing the current flowing through the LED module and omitting the capacitor 1634 by utilizing the inherent characteristics of the inductor that resist instantaneous changes in the current flowing through the inductor. Good.

  As described above, the drive circuit 1630 is configured to determine the timing for turning on (conductive) or off (cut off) the switch 1635 in accordance with the current detection signal S535 and / or the current detection signal S531. The driving circuit 1630 can maintain a stable current of the LED module. Therefore, for LED modules such as white, red, blue, and green, the color temperature does not change with the current. For example, LEDs can maintain the same color temperature even under various lighting conditions. In some embodiments, the inductor 1632 that acts as an energy storage circuit releases the stored power when the switch 1635 is turned off, so that the LED module can continue to emit light while maintaining the same color temperature. The voltage / current flowing through the LED module is maintained above a predetermined voltage / current level. In this way, when the switch 1635 is turned on again, there is no need to adjust the voltage / current flowing through the LED module from the minimum value to the maximum value. Therefore, flickering of the LED module can be avoided, the entire illumination can be improved, the minimum conduction period can be further shortened, and the drive frequency can be further increased.

  FIG. 12D is a schematic diagram of a drive circuit according to an embodiment. Referring to FIG. 12D, the drive circuit 1730 in this embodiment includes a step-up DC-DC converter circuit having a controller 1731 and a converter circuit. The converter circuit includes an inductor 1732, a “freewheeling” diode 1733, a capacitor 1734, and a switch 1735. The drive circuit 1730 is configured to receive the filter signal from the filter output terminals 521 and 522 and convert it into a drive signal for driving the LED module connected between the drive output terminals 1521 and 1522.

  The inductor 1732 has one end connected to the filter output terminal 521 and the other end connected to the anode of the freewheeling diode 1733 and the first terminal of the switch 1735, and the switch 1735 is connected to the filter output terminal 522. And a second terminal connected to the drive output terminal 1522. Freewheeling diode 1733 has a cathode connected to drive output terminal 1521. The capacitor 1734 is connected between the drive output terminals 1521 and 1522.

  The controller 1731 is coupled to the control terminal of the switch 1735 and is configured to determine the timing for turning the switch 1735 on (conductive state) or off (cut-off state) in accordance with the current detection signal S535 and / or the current detection signal S531. Yes. When the switch 1735 is turned on, the current of the filter signal is input through the filter output terminal 521, flows through the inductor 1732 and the switch 1735, and then is output from the filter output terminal 522. While the current is flowing in this way, the current flowing through the inductor 1732 increases with time, the inductor 1732 enters the energy storage state, while the capacitor 1734 enters the energy discharge state, and the LED module can continue to emit light. On the other hand, when the switch 1735 is turned off, the inductor 1732 enters an energy discharge state as the current flowing through the inductor 1732 decreases with time. In this state, the current flowing through the inductor 1732 then flows through the freewheeling diode 1733, the capacitor 1734, and the LED module, and the capacitor 1734 enters an energy storage state.

  In some embodiments, the capacitor 1734 is an optional element and may be omitted and is therefore drawn with a dotted line in FIG. 12D. When the capacitor 1734 is omitted and the switch 1735 is on, the current of the inductor 1732 does not flow through the LED module and does not cause the LED module to emit light. However, when the switch 1735 is switched off, the current of the inductor 1732 flows through the freewheeling diode 1733 and reaches the LED module, causing the LED module to emit light. Therefore, by controlling the timing at which the LED module emits light and the magnitude of the current flowing through the LED module, the average luminance of the LED module can be stabilized in a state higher than the specified value, thereby achieving the effect of emitting stable light. can do.

  As described above, the controller 1731 included in the drive circuit 1730 is connected to the control terminal of the switch 1735, and the switch 1735 is turned on (conductive state) or off (cut off state) in accordance with the current detection signal S535 and / or the current detection signal S531. The driving circuit 1730 can maintain a stable current in the LED module. Therefore, for LED modules such as white, red, blue, and green, the color temperature does not change with the current. For example, LEDs can maintain the same color temperature even under various lighting conditions. In some embodiments, the inductor 1732 that acts as an energy storage circuit releases the stored power when the switch 1735 is cut off, allowing the LED module to continue to emit light while maintaining the same color temperature. The voltage / current flowing through the LED module is maintained above a predetermined voltage / current level. In this way, when the switch 1735 is turned on again, it is not necessary to adjust the voltage / current flowing through the LED module from the minimum value to the maximum value. Therefore, flickering of the LED module can be avoided, the entire illumination can be improved, the minimum conduction period can be further shortened, and the drive frequency can be further increased.

  FIG. 12E is a schematic diagram of a drive circuit according to an exemplary embodiment. Referring to FIG. 12E, the drive circuit 1830 in this embodiment includes a step-down DC-DC converter circuit having a controller 1831 and a converter circuit. The converter circuit includes an inductor 1832, a “freewheeling” diode 1833, a capacitor 1834, and a switch 1835. The driving circuit 1830 is connected to the filter output terminals 521 and 522, receives the filter signal, and converts it into a driving signal for driving the LED module connected between the driving output terminals 1521 and 1522.

  The switch 1835 has a first terminal connected to the filter output terminal 521, a second terminal connected to the cathode of the freewheeling diode 1833, and a control terminal connected to the controller 1831. A control signal is received from a controller 1831 for controlling current conduction or current interruption between the first terminal and the second terminal. The anode of the freewheeling diode 1833 is connected to the filter output terminal 522 and the drive output terminal 1522. Inductor 1832 has one end connected to the second terminal of switch 1835 and the other end connected to drive output terminal 1521. Capacitor 1834 is coupled between drive output terminals 1521 and 1522 to stabilize the voltage between drive output terminals 1521 and 1522.

  The controller 1831 is configured to control the timing at which the switch 1835 is turned on (conductive state) or turned off (cut off state) in accordance with the current detection signal S535 and / or the current detection signal S531. When the switch 1835 is turned on, the current of the filter signal is input through the filter output terminal 521, flows through the switch 1835, the inductor 1832, the drive output terminals 1521 and 1522, and then is output from the filter output terminal 522. While the current flows in this way, both the current flowing through the inductor 1832 and the voltage of the capacitor 1834 increase with time, so that the inductor 1832 and the capacitor 1834 enter an energy storage state. On the other hand, when the switch 1835 is switched off, the inductor 1832 enters an energy release state, and thus the current flowing through the inductor 1832 decreases with time. In this case, the current flowing through the inductor 1832 circulates through the drive output terminals 1521 and 1522 and the freewheeling diode 1833 and returns to the inductor 1832.

  In some embodiments, the capacitor 1834 is an optional element and may be omitted and is therefore drawn with a dotted line in FIG. 12E. When the capacitor 1834 is omitted, whether the switch 1835 is on or off, the current through the inductor 1832 flows through the drive output terminals 1521 and 1522 to drive the LED module and continue to emit light.

  As described above, the controller 1831 included in the drive circuit 1830 is configured to control the timing at which the switch 1835 is turned on (conductive state) or turned off (cut off state) in accordance with the current detection signal S535 and / or the current detection signal S531. Therefore, the driving circuit 1730 can maintain a stable current in the LED module. Therefore, for LED modules such as white, red, blue, and green, the color temperature does not change with the current. For example, LEDs can maintain the same color temperature even under various lighting conditions. In some embodiments, the inductor 1832 acting as an energy storage circuit releases the stored power when the switch 1835 is turned off, allowing the LED module to continue to emit light while maintaining the same color temperature. The voltage / current flowing through the LED module is maintained above a predetermined voltage / current level. Thus, when the switch 1835 is turned on again, there is no need to adjust the voltage / current flowing through the LED module from the minimum value to the maximum value. Therefore, flickering of the LED module can be avoided, the entire illumination can be improved, the minimum conduction period can be further shortened, and the drive frequency can be further increased.

  FIG. 12F is a schematic diagram of a drive circuit according to an exemplary embodiment. Referring to FIG. 12F, the drive circuit 1930 in this embodiment includes a step-down DC-DC converter circuit having a controller 1931 and a converter circuit. The converter circuit includes an inductor 1932, a “freewheeling” diode 1933, a capacitor 1934, and a switch 1935. The drive circuit 1930 is connected to the filter output terminals 521 and 522, receives the filter signal, and converts it into a drive signal for driving the LED module connected between the drive output terminals 1521 and 1522.

  Inductor 1932 has one end connected to filter output terminal 521 and drive output terminal 1522, and the other end connected to the first end of switch 1935. The switch 1935 has a second end connected to the filter output terminal 522 and a control terminal connected to the controller 1931, and receives a control signal from the controller 1931 for controlling current conduction or current interruption of the switch 1935. Receive. Freewheel diode 1933 has an anode coupled to a node connecting inductor 1932 and switch 1935, and a cathode coupled to drive output terminal 1521. The capacitor 1934 is connected to the drive output terminals 1521 and 1522 to stabilize the drive of the LED module connected between the drive output terminals 1521 and 1522.

  The controller 1931 is configured to control the timing at which the switch 1935 is turned on (conductive state) or turned off (cut off state) in accordance with the current detection signal S531 and / or the current detection signal S535. When the switch 1935 is turned on, current is input through the filter output terminal 521, flows through the inductor 1932 and the switch 1935, and then is output from the filter output terminal 522. While the current flows in this way, the current flowing through the inductor 1932 increases with time, so that the inductor 1932 enters an energy storage state. However, since the voltage of the capacitor 1934 decreases with time, the capacitor 1934 enters an energy release state and continues to emit light from the LED module. On the other hand, when the switch 1935 is switched off, the inductor 1932 enters an energy releasing state, and its current decreases with time. In this case, the current flowing through the inductor 1932 circulates through the freewheeling diode 1933 and the drive output terminals 1521 and 1522 and returns to the inductor 1932. During this circulation, capacitor 1934 is in an energy storage state and its voltage increases with time.

  In some embodiments, the capacitor 1934 is an optional element and may be omitted, and is drawn with a dotted line in FIG. 12F. When the capacitor 1934 is omitted and the switch 1935 is turned on, the current flowing through the inductor 1932 does not flow through the drive output terminals 1521 and 1522, so that the LED module does not emit light. On the other hand, when the switch 1935 is switched off, the current flowing through the inductor 1932 flows through the LED module after the freewheeling diode 1933, causing the LED module to emit light. Therefore, by controlling the timing at which the LED module emits light and the magnitude of the current flowing through the LED module, the average luminance of the LED module can be stabilized at a state higher than the specified value, thereby achieving the effect of emitting stable light. can do.

  As described above, the controller 1931 included in the drive circuit 1930 is configured to control the timing at which the switch 1935 is turned on (conductive state) or off (cut off state) in accordance with the current detection signal S535 and / or the current detection signal S531. Therefore, the driving circuit 1930 can maintain a stable current in the LED module. Therefore, for LED modules such as white, red, blue, and green, the color temperature does not change with the current. For example, LEDs can maintain the same color temperature even under various lighting conditions. In some embodiments, the inductor 1932 acting as an energy storage circuit releases the stored power when the switch 1935 is interrupted, so that the LED module can continue to emit light while maintaining the same color temperature. The voltage / current flowing through the LED module is maintained above a predetermined voltage / current level. In this way, when the switch 1935 is turned on again, there is no need to adjust the voltage / current flowing through the LED module from the minimum value to the maximum value. Therefore, flickering of the LED module can be avoided, the entire illumination can be improved, the minimum conduction period can be further shortened, and the drive frequency can be further increased.

  Referring to FIGS. 5 and 6, the short circuit board 253 includes a first short circuit board and a second short circuit board connected to the two end portions of the long circuit sheet 251, respectively. They are arranged on the first short circuit board and the second short circuit board, respectively. The first short circuit board and the second short circuit board may have substantially the same length or different lengths. In general, the length of the first short circuit board (that is, the circuit board on the right side of the short circuit board 253 in FIG. 5 and the circuit board on the left side of the short circuit board 253 in FIG. 6) is equal to the length of the second short circuit board (that is, FIG. 5 is approximately 30% to 80% of the length of the circuit board on the left side of the short circuit board 253 and the circuit board on the right side of the short circuit board 253 in FIG. In some embodiments, the length of the first short circuit board is approximately one third to two thirds of the length of the second short circuit board. For example, in one embodiment, the length of the first short circuit board may be approximately half the length of the second short circuit board. For example, the length of the second short circuit board may be in the range of approximately 15 mm to approximately 65 mm, although it depends on actual application conditions. In some embodiments, the first short circuit board is disposed on the end cap at one end of the LED straight tube lamp, and the second short circuit substrate is disposed on the end cap at the other end of the LED straight tube lamp.

  For example, in practice, the drive circuit capacitors such as capacitors 1634, 1734, 1834, and 1934 of FIGS. 12C-12F may comprise two or more capacitors connected in parallel. Some or all of the capacitors of the drive circuit of the power supply module may be arranged on the first short circuit board of the short circuit board 253, while the rectifier circuit, the filter circuit, and the (one or more) inductors of the drive circuit , Other components such as a controller (one or more), a switch (one or more), and a plurality of diodes are arranged on the second short circuit board of the short circuit board 253. Since inductors, controllers, switches, etc. are electronic components that become hot, arranging some or all of the capacitors on a circuit board away from the circuit board of the high-temperature parts makes the high-temperature parts of the capacitors (particularly electrolytic capacitors) It helps to prevent adverse effects on the service life and improves the reliability of the capacitor. Furthermore, the problem of electromagnetic interference (EMI) can be reduced by physically separating the capacitor and the rectifier circuit, and the capacitor and the filter circuit.

  In certain exemplary embodiments, the conversion efficiency of the drive circuit is greater than 80%. In some embodiments, the conversion efficiency of the drive circuit is greater than 90%. In yet another embodiment, the conversion efficiency of the drive circuit is over 92%. The illumination efficiency of LED lamps exceeds 120 lm / W. In some embodiments, the illumination efficiency of the LED lamp is greater than 160 lm / W. The illumination efficiency including the combination of the drive circuit and the LED module exceeds 120 lm / W * 90% = 108 lm / W. In some embodiments, the illumination efficiency including the combination of drive circuit and LED module is over 160 lm / W * 92% = 147.21 lm / W.

  In some embodiments, the transmittance of the diffusion film in the LED straight tube lamp is greater than 85%. As a result, in some embodiments, the illumination efficiency of the LED lamp exceeds 108 lm / W * 85% = 91.8 lm / W. In some embodiments, the illumination efficiency of the LED lamp is greater than 147.21 lm / W * 85% = 125.12 lm / W.

  FIG. 13A is a block diagram of a power module of an LED straight tube lamp according to an exemplary embodiment. Compared with FIG. 8C, the present embodiment includes a rectifier circuit 510, a filter circuit 520, and a drive circuit 1530, and further includes an over voltage protection (OVP) circuit 1570. In the present embodiment, the drive circuit 1530 and the LED module 630 constitute the LED illumination module 530. The OVP circuit 1570 is connected to filter output terminals 521 and 522 for detecting the filter signal. If the OVP circuit 1570 determines that the logic level of the filter signal is higher than the specified OVP value, the OVP circuit 1570 clamps the logic level of the filter signal. Therefore, the OVP circuit 1570 protects the LED lighting module 530 from damage due to the OVP state.

  FIG. 13B is a schematic diagram of an overvoltage protection (OVP) circuit according to an exemplary embodiment. The OVP circuit 1670 includes a voltage clamp diode 1671, such as a Zener diode, coupled to the filter output terminals 521 and 522. When the voltage difference between filter output terminals 521 and 522 (ie, the logic level of the filter signal) reaches the breakdown voltage, the voltage clamp diode conducts and clamps the voltage difference to the breakdown voltage. In some embodiments, the breakdown voltage may range from approximately 40V to approximately 100V. In certain embodiments, the breakdown voltage may range from approximately 55V to approximately 75V.

  FIG. 14A is a block diagram of a power module of an LED straight tube lamp according to an exemplary embodiment. Compared with that shown in FIG. 8C, the present embodiment further includes an auxiliary power supply module 2510 in addition to the rectifier circuit 510, the filter circuit 520, and the drive circuit 1530. The auxiliary power module 2510 is connected between the filter output terminals 521 and 522. The auxiliary power supply module 2510 detects the filter signals at the filter output terminals 521 and 522, and determines whether or not to supply auxiliary power to the filter output terminals 521 and 522 based on the detection result. When the supply of the filter signal is stopped or the logic level thereof is insufficient, that is, when the driving voltage of the LED module is lower than the specified voltage, the auxiliary power supply module supplies auxiliary power, and the LED lighting module 530 is supplied. Continue to emit light. The specified voltage is determined according to the auxiliary voltage of the auxiliary power module 2510.

  FIG. 14B is a block diagram of a power module of an LED straight tube lamp according to an exemplary embodiment. Compared to that shown in FIG. 14A, the present embodiment includes a rectifier circuit 510 and a filter circuit 520, and may further include some portions of the LED lighting module 530 and an auxiliary power supply module 2510. Further includes a drive circuit 1530 and an LED module 630. The auxiliary power supply module 2510 is connected between the drive output terminals 1521 and 1522. The auxiliary power supply module 2510 detects the drive signals of the drive output terminals 1521 and 1522, and determines whether or not auxiliary power is supplied to the drive output terminals 1521 and 1522 based on the detection result. When the drive signal is no longer supplied or its logic level is insufficient, the auxiliary power module 2510 supplies auxiliary power to keep the LED lighting module 630 lit continuously.

  FIG. 14C is a schematic diagram of an auxiliary power supply module according to an embodiment. The auxiliary power supply module 2610 includes an energy storage unit 2613 and a voltage detection circuit 2614. The auxiliary power supply module further includes an auxiliary power supply positive terminal 2611 and an auxiliary power supply negative terminal 2612 connected to the filter output terminals 521 and 522 or the drive output terminals 1521 and 1522, respectively. The voltage detection circuit 2614 detects the logic level of the signals of the auxiliary power supply positive terminal 2611 and the auxiliary power supply negative terminal 2612, and externally supplies the power of the energy storage unit 2613 via the auxiliary power supply positive terminal 2611 and the auxiliary power supply negative terminal 2612. Decide whether to release.

  In some embodiments, the energy storage unit 2613 is a battery or a super capacitor. When the voltage difference between the auxiliary power supply positive terminal 2611 and the auxiliary power supply negative terminal 2612 (LED module drive voltage) is higher than the auxiliary voltage of the energy storage unit 2613, the voltage detection circuit 2614 has the auxiliary power supply positive terminal 2611 and the auxiliary power supply negative terminal 2612. The energy storage unit 2613 is charged by the signal. When the drive voltage is lower than the auxiliary voltage, the energy storage unit 2613 releases the energy stored via the auxiliary power source positive terminal 2611 and the auxiliary power source negative terminal 2612 to the outside.

  The voltage detection circuit 2614 includes a diode 2615, a bipolar junction transistor (BJT) 2616, and a resistor 2617. The positive end of the diode 2615 is connected to the positive end of the energy storage unit 2613, and the negative end of the diode 2615 is connected to the auxiliary power source positive terminal 2611. The negative end of the energy storage unit 2613 is connected to the auxiliary power source negative terminal 2612. The collector of the BJT 2616 is connected to the auxiliary power source positive terminal 2611 and the emitter thereof is connected to the positive end of the energy storage unit 2613. One end of the resistor 2617 is connected to the auxiliary power supply positive terminal 2611, and the other end is connected to the base of the BJT 2616. When the collector of BJT 2616 is at a higher cut-in voltage than the emitter, resistor 2617 causes BJT 2616 to conduct. Normally, when power is supplied from the power source to the LED straight tube lamp, the filter signal is passed through the filter output terminals 521 and 522 and the BJT 2616 in the conductive state until the collector-emitter voltage of the BJT 2616 becomes equal to or lower than the cut-in voltage. The energy storage unit 2613 is charged by the drive signal via the drive output terminals 1521 and 1522 and the BJT 2616 in the conductive state. When the filter signal or drive signal is no longer supplied, or when its logic level is insufficient, the energy storage unit 2613 supplies power through the diode 2615 to continue the LED lighting module 530 or the LED module 630. Turn on.

  In some embodiments, the maximum voltage of the charged energy storage unit 2613 is at least one cut-in voltage of the BJT 2616 that is lower than the voltage difference across the auxiliary power supply positive terminal 2611 and the auxiliary power supply negative terminal 2612. . A voltage difference applied between the auxiliary power supply positive terminal 2611 and the auxiliary power supply negative terminal 2612 is a turn-on voltage lower than the voltage of the energy storage unit 2613. Therefore, when the auxiliary power supply module 2610 supplies power, the voltage applied to the LED module 630 is lower (approximately the sum of the cut-in voltage of the BJT 2616 and the turn-on voltage of the diode 2615). In the embodiment shown in FIG. 14B, when the auxiliary power module supplies power to the LED module 630, the brightness of the LED module 630 decreases. Therefore, when the auxiliary power supply module is applied to the emergency lighting system or the constant lighting system, the user recognizes that the main power source such as the commercial power source is abnormal and takes necessary measures.

  A block diagram of an LED straight tube lamp including a power supply module according to a specific embodiment will be described with reference to FIG. 15A. Compared with the LED lamp shown in FIG. 8C, the LED straight tube lamp of FIG. 15A includes a rectifier circuit 510, a filter circuit 520, and an LED illumination module 530, and further includes an attachment detection module 2520. The attachment detection module 2520 is connected to the rectifier circuit 510 via the attachment detection terminal 2521 and is connected to the filter circuit 520 via the attachment detection terminal 2522. The attachment detection module 2520 detects signals passing through the attachment detection terminals 2521 and 2522, and determines whether to block an LED drive signal (for example, an external drive signal) passing through the LED straight tube lamp based on the detection result. . The attachment detection module 2520 includes a circuit configured to perform a step of detecting a signal passing through the attachment detection terminals 2521 and 2522 and a step of determining whether or not to block the LED drive signal. More generally, it may be called a detection circuit or a cutoff circuit. LED straight tube lamp is not yet attached to the lamp socket or holder, or is not properly attached or only partially attached (for example, one is connected to the lamp socket while the other Is not connected yet), the attachment detection module 2520 detects a current (or current value) smaller than a predetermined current and determines that the signal passes through the high impedance attachment detection terminals 2521 and 2522. To do. In this case, in a specific embodiment, the attachment detection circuit 2520 enters a cut-off state and stops the operation of the LED straight tube lamp. Otherwise, the attachment detection module 2520 determines that the LED straight tube lamp is already attached to the lamp socket or holder (for example, the attachment detection module 2520 detects a current higher than a predetermined current, and the low impedance attachment It is determined that the signal is passing through the detection terminals 2521 and 2522), and the conduction state is maintained to operate the LED straight tube lamp normally.

  For example, in some embodiments, when the current passing through the attachment detection terminals 2521 and 2522 is greater than or equal to a specific specified installation current (or current value), that is, the current supplied to the LED lighting module 530 is a specific specification. When it indicates that the operating current is greater than or equal to the operating current, the attachment detection module 2520 is in a conducting state and operates the LED straight tube lamp in a conducting state. For example, a current greater than a specific current value may indicate that the LED straight tube lamp is correctly attached to the lamp socket or holder. When the current passing through the attachment detection terminals 2521 and 2522 is less than a specified specified installation current (or current value), that is, when the current supplied to the LED lighting module 530 is less than a specified specified operating current, Based on the determination that the LED straight tube lamp is not attached to the lamp socket or holder, or is not properly connected, the attachment detection module 2520 cuts off the current and causes the LED straight tube lamp to become non-conductive. . In certain embodiments, the attachment detection module 2520 determines whether to conduct or shut off based on the detection of impedance and causes the LED straight tube lamp to operate in a conducting state or to a non-conducting state. An LED straight tube lamp operating in a conductive state may refer to an LED straight tube lamp in which a current sufficient to cause the LED light source to emit light is flowing through the LED module. An LED straight tube lamp that operates in a cut-off state may refer to an LED straight tube lamp in which sufficient current is not flowing through the LED module or no current is flowing at all. Therefore, it is possible to efficiently avoid the occurrence of electric shock caused by touching the conductive portion of the LED straight tube lamp that is not correctly attached to the lamp socket or the holder.

  With reference to FIG. 15B, a block diagram of an attachment detection module according to a particular embodiment will be described. The attachment detection module includes a switch circuit 2580, a detection pulse generation module 2540, a detection result latch circuit 2560, and a detection determination circuit 2570. Some of these circuits or modules may be referred to as first, second, third circuits, etc. as naming conventions to distinguish them from each other.

  The detection determination circuit 2570 is connected to the attachment detection terminal 2521 and the attachment detection terminal 2521 (via the switch circuit connection terminal 2581 and the switch circuit 2580), and detects a signal between the attachment detection terminals 2521 and 2522. The detection determination circuit 2570 is also connected to the detection result latch circuit 2560 via the detection result terminal 2571 and transmits a detection result signal to the detection result latch circuit 2560. The detection determination circuit 2570 may be configured to detect a current flowing through the terminals 2521 and 2522 (for example, to detect whether the current is larger or smaller than a specific current value).

  The detection pulse generation module 2540 is connected to the detection result latch circuit 2560 via the pulse signal output terminal 2541, generates a pulse signal, and notifies the detection result latch circuit 2560 of the timing for latching (holding) the detection result. For example, the detection pulse generation module 2540 is configured to generate a signal that maintains a latch circuit such as the detection result latch circuit 2560 in a state corresponding to either the conduction state or the interruption state of the LED straight tube lamp. But you can. The detection result latch circuit 2560 holds the detection result in accordance with the detection result signal (or the detection result signal and the pulse signal), and the detection result is sent to the switch circuit 2580 connected to the detection result latch circuit 2560 via the detection result latch terminal 2561. Send or provide. The switch circuit 2580 controls the conduction or cutoff state between the attachment detection terminals 2521 and 2522 according to the detection result.

  In some embodiments, the detection pulse generation module 2540 may be referred to as a first circuit 2540, the detection result latch circuit 2560 may be referred to as a second circuit 2560, the switch circuit 2580 may be referred to as a third circuit 2580, The detection determination circuit 2570 may be called a fourth circuit 2570, the switch circuit connection terminal 2581 may be called a first terminal 2581, the detection result terminal 2571 may be called a second terminal 2571, and the pulse signal output terminal 2541 is a first signal. The detection result latch terminal 2561 may be called a fourth terminal 2561, the attachment detection terminal 2521 may be called a first attachment detection terminal 2521, and the attachment detection terminal 2522 is a second attachment detection terminal 2522. You may call it. In this exemplary embodiment, the fourth circuit 2570 is coupled to the third circuit 2580 and the second circuit 2560 via the first terminal 2581 and the second terminal 2571, respectively, and the second circuit 2560 is connected to the third terminal 2541. The first circuit 2540 and the third circuit 2580 are connected to each other through the fourth terminal 2561 and the fourth terminal 2561, respectively.

In some embodiments, the fourth circuit 2570 is configured to detect a signal between the first attachment detection terminal 2521 and the second attachment detection terminal 2522 via the first terminal 2581 and the third circuit 2580. Yes. For example, with the above configuration, the fourth circuit 2570 detects and determines whether the current flowing through the first attachment detection terminal 2521 and the second attachment detection terminal 2522 is smaller or larger than a predetermined current value, and determines the second terminal 2571. The detection result signal can be transmitted or provided to the second circuit 2560 through the second circuit 2560.

  In some embodiments, the first circuit 2540 generates a pulse signal via the second circuit 2560 and operates the third circuit 2580 in a conducting state during the pulse signal period. On the other hand, as a result, the power loop of the LED straight tube lamp between the attachment detection terminals 2521 and 2522 also becomes conductive. The fourth circuit 2570 detects the sampling signal on the power supply loop, generates a signal based on the detection result, and the timing at which the second circuit 2560 latches (or holds) the detection result received from the fourth circuit 2570. This is transmitted to the second circuit 2560. For example, the fourth circuit 2570 may be a circuit configured to generate a signal for maintaining the latch circuit such as the second circuit 2560 in a state corresponding to either the conduction state or the interruption state of the LED straight tube lamp. . The second circuit 2560 stores the detection result according to the detection result signal (or the detection result signal and the pulse signal), and the detection result is sent to the third circuit 2580 connected to the second circuit 2560 via the fourth terminal 2561. Send or provide. The third circuit 2580 receives the detection result transmitted from the second circuit 2560, and controls the conduction or cutoff state between the attachment detection terminals 2521 and 2522 according to the detection result. The labels such as “first”, “second”, and “third” described in relation to these embodiments are interchangeable. In the present specification, different circuits, nodes, and other parts are connected to each other. It is only used for easy distinction.

  With reference to FIG. 15C, a block diagram of a detection pulse generation module according to certain embodiments is described. The detection result generation module 2640 may be a circuit including a plurality of capacitors 2642, 2645, 2646, a plurality of resistors 2643, 2647, 2648, two buffers 2644, 2651, an inverter 2650, a diode 2649, and an OR gate 2652. Capacitor 2642 may be referred to as first capacitor 2642, capacitor 2645 may be referred to as second capacitor 2645, and capacitor 2646 may be referred to as third capacitor 2646. Resistor 2643 may be referred to as first resistor 2643, resistor 2647 may be referred to as second resistor 2647, and resistor 2648 may be referred to as third resistor 2648. Buffer 2644 may be referred to as first buffer 2644 and buffer 2651 may be referred to as second buffer 2651. The diode 2649 may be referred to as a first diode 2649 and the OR gate 2652 may be referred to as a first OR gate 2652. During use or operation, the capacitor 2642 and the resistor 2643 are connected to a drive voltage (eg, a drive voltage source, which may be a power supply node) such as VCC, which is generally defined as a high logic level voltage in this embodiment, and a ground. It is connected in series with a reference voltage (or potential) such as a potential. A connection node between the capacitor 2642 and the resistor 2643 is connected to an input terminal of the buffer 2644. In the exemplary embodiment, buffer 2644 includes two inverters connected in series between the input and output terminals of buffer 2644. Resistor 2647 is coupled between a drive voltage such as VCC and the input terminal of inverter 2650. In this embodiment, the resistor 2648 is connected between the input terminal of the buffer 2651 and a reference voltage such as a ground potential. The anode of the diode 2649 is grounded, and the cathode of the diode 2649 is connected to the input terminal of the buffer 2651. The first ends of capacitors 2645 and 2646 are collectively connected to the output terminal of buffer 2644, and the opposite second ends of capacitors 2645 and 2646 are connected to the input terminal of inverter 2650 and the input terminal of buffer 2651, respectively. The In the exemplary embodiment, the buffer 2651 includes two inverters connected in series between the input terminal and the output terminal of the buffer 2651. The output terminal of inverter 2650 and the output terminal of buffer 2651 are connected to the two input terminals of OR gate 2652. According to one particular embodiment, any “high logic level” or “low logic level” voltage (or potential) referred to herein may be referred to as another voltage (potential) or a specific voltage in the circuit. The reference voltage (or potential) is used as a reference, and may be referred to as “logic high logic level” or “logic low logic level”.

  When one end cap of the LED straight tube lamp is inserted into the lamp socket and the other end cap is electrically connected to the human body, or when both end caps of the LED straight tube lamp are inserted into the lamp socket, the LED The tube lamp becomes conductive. At this time, the attachment detection module (eg, attachment detection module 2520 shown in FIG. 15A) enters the detection stage. The voltage on the connection node of capacitor 2642 and resistor 2643 is initially high (equal to drive voltage VCC), decreases with time and finally becomes zero. Since the input terminal of buffer 2644 is coupled to the connection node of capacitor 2642 and resistor 2643, buffer 2644 initially outputs a high logic level signal and the voltage on the connection node of capacitor 2642 and resistor 2643 is low logic trigger logic. When it falls to the level, it turns to the output of a low logic level signal. As a result, the buffer 2644 is configured to remain at a low logic level (stop output of the input pulse signal) after generating the input pulse signal. The width of the input pulse signal may be one (initial setting) period determined by the capacitance value of the capacitor 2642 and the resistance value of the resistor 2643.

  Next, an operation in which the buffer 2644 generates a pulse signal for the initial setting period will be described below. Since the voltage at the first end of the capacitor 2645 and the voltage at the first end of the resistor 2647 are equal to the drive voltage VCC, the voltage on the connection node between the capacitor 2645 and the resistor 2647 is also at a high logic level. Since the first end of resistor 2648 is grounded and the first end of capacitor 2646 receives the input pulse signal from buffer 2644, the connection node of capacitor 2646 and resistor 2648 initially has a high logic level voltage. However, with time, this voltage drops to zero (while the voltage held by the capacitor is equal to or close to the drive voltage VCC). Therefore, first, the inverter 2650 outputs a low logic level signal, the buffer 2651 outputs a high logic level signal, and thus the OR gate 2652 outputs a high logic level signal (first pulse signal) from the pulse signal output terminal 2541. . At this time, the detection result latch circuit 2560 (shown in FIG. 15B) follows the detection result signal received from the detection determination circuit 2570 (shown in FIG. 15B) and the pulse signal generated at the pulse signal output terminal 2541. The detection result is held for the first time. During this initial pulse period, as shown in FIG. 15B, the detection pulse generation module 2540 outputs a high logic level signal, and as a result, the detection result latch circuit 2560 outputs the result of the high logic level signal.

  When the voltage at the connection node between the capacitor 2646 and the resistor 2648 decreases to the low logic trigger logic level, the buffer 2651 switches to the output of the low logic level signal and outputs the low logic level signal from the pulse signal output terminal 2541 to the OR gate 2652. (That is, the output of the first pulse signal is stopped). The width of the first pulse signal output from the OR gate 2652 is determined by the capacitance value of the capacitor 2646 and the resistance value of the resistor 2648.

  The operation after the buffer 2644 stops outputting the pulse signal will be described below. For example, this operation may start from the operation phase. Capacitor 2646 holds a voltage approximately equal to drive voltage VCC, so that when buffer 2644 instantaneously changes its output from a high logic level signal to a low logic level signal, it is on the connection node of capacitor 2642 and resistor 2648. Although the voltage is less than zero, diode 2649 is quickly pulled up to zero by charging capacitor 2646. Therefore, the buffer 2651 continues to output a low logic level signal.

  In some embodiments, when the buffer 2644 instantaneously changes its output from a high logic level signal to a low logic signal, the voltage at one end of the capacitor 2645 also immediately changes from the drive voltage VCC to zero. As a result, a connection node between the capacitor 2645 and the resistor 2647 has a low logic level signal. At this time, the output of the inverter 2650 changes to a high logic level signal and causes the OR gate to output a high logic level signal (second pulse signal) from the pulse signal output terminal 2541. The detection result latch circuit 2560 shown in FIG. 15B has the second time period according to the detection result signal received from the detection determination circuit 2570 (shown in FIG. 15B) and the pulse signal generated at the pulse signal output terminal 2541. Hold the detection result. Next, the drive voltage VCC charges the capacitor 2645 via the resistor 2647, and increases the voltage on the connection node between the capacitor 2645 and the resistor 2647 to the drive voltage VCC with time. When the voltage on the connection node of capacitor 2645 and resistor 2647 rises until it reaches a high logic trigger logic level, inverter 2650 outputs a low logic level signal again, causing OR gate 2652 to stop outputting the second pulse signal. . The width of the second pulse signal is determined by the capacitance value of the capacitor 2645 and the resistance value of the resistor 2647.

  As described above, in a specific embodiment, the detection pulse generation module 2640 generates two high logic level pulse signals, a first pulse signal and a second pulse signal, in the detection stage. These pulse signals are output from a pulse signal output terminal 2541. Furthermore, there is a specified time interval between the first pulse signal and the second pulse signal (for example, a reverse logic signal that is a low logic level if these pulse signals are at a high logic level). Is determined by the capacitance value of the capacitor 2642 and the resistance value of the resistor 2643.

  Upon entering the operation phase from the detection phase, the detection pulse generation module 2640 no longer generates a pulse signal and keeps the pulse signal output terminal 2541 at a low logic level potential. As described above, the operation phase is a phase following the detection phase (that is, the time after the second pulse signal is finished). An operating phase occurs when the LED straight tube lamp is at least partially connected to a power source provided, for example, in a lamp socket. For example, when a part of the LED straight tube lamp is connected to one lamp socket, such as only one side of the LED straight tube lamp, or when a part of the LED straight tube lamp is connected to a high impedance like a human being And / or when a portion of the LED straight tube lamp is not properly connected to the opposite lamp socket (for example, when the metal contact in the socket does not contact the metal contact of the LED straight tube lamp due to misalignment) An operational phase may occur. The operating phase may also occur when the entire LED straight tube lamp is properly connected to the lamp socket.

  A detection determination circuit according to a specific embodiment will be described with reference to FIG. 15D. The exemplary detection determination circuit 2670 includes a comparator 2671 and a resistor 2672. The comparator 2671 may be referred to as a first comparator 2671, and the resistor 2672 may be referred to as a fifth resistor 2672. The negative input terminal of the comparator 2671 receives the reference logic level signal (or reference voltage) Vref. The positive input terminal of the comparator 2671 is grounded via the resistor 2672 and is also connected to the switch circuit connection terminal 2581. Referring to FIGS. 15B and 15D, a signal flowing from the attachment detection terminal 2521 to the switch circuit 2580 is output from the switch circuit connection terminal 2581 to the resistor 2672. When the current of the signal passing through the resistor 2672 reaches a certain level (for example, a specified current for mounting (eg, 2 A) or more), and the voltage on the resistor 2672 becomes higher than the reference voltage Vref (two end caps are connected to the lamp socket). The comparator 2671 generates a high logic level detection result signal and outputs it to the detection result terminal 2571. For example, when the LED straight tube lamp is correctly installed in the lamp socket, the comparator 2671 outputs a high logic level detection result signal from the detection result terminal 2571. On the other hand, when the current flowing through the resistor 2672 is insufficient and the voltage on the resistor 2672 cannot be higher than the reference voltage Vref (refers to the case where only one end cap is inserted into the lamp socket), the comparator 2671 is low. A logic level detection result signal is generated and output to the detection result terminal 2571. Thus, in some embodiments, if the LED straight tube lamp is not properly attached to the lamp socket, or one end cap is inserted into the lamp socket, the other end cap is grounded by an object such as a human body. If so, the current is too small and the comparator 2671 cannot output the high logic level detection result signal to the detection result terminal 2571.

  With reference to FIG. 15E, schematic detection result latch circuits according to some embodiments of the present invention will be described. The detection result latch circuit 2660 includes a D flip-flop 2661, a resistor 2662, and an OR gate 2663. The D flip-flop 2661 may be referred to as a first D flip-flop 2661, the resistor 2662 may be referred to as a fourth resistor 2662, and the OR gate 2663 may be referred to as a second OR gate 2663. The D flip-flop 2661 has a CLK input terminal connected to the detection result terminal 2571 and a D input terminal connected to the drive voltage VCC. First, when the detection result terminal 2571 outputs a low logic level detection result signal, the D flip-flop 2661 first outputs a low logic level signal from the Q output terminal, but when the detection result terminal 2571 outputs a high logic level detection result signal, The D flip-flop 2661 outputs a high logic level signal from the Q output terminal. The resistor 2662 is connected between the Q output terminal of the D flip-flop 2661 and a reference voltage such as a ground potential. When the OR gate 2663 receives the first or second pulse signal from the pulse signal output terminal 2541 or receives the high logic level signal from the Q output terminal of the D flip-flop 2661, the OR gate 2663 receives the high signal from the detection result latch terminal 2561. A logic level detection result latch signal is output. Only in the detection stage, the detection pulse generation module 2640 outputs the first and second pulse signals, and causes the OR gate 2663 to output a high logic level detection result latch signal, so that the D flip-flop 2661 can detect, for example, the detection stage. It is determined whether the detection result latch signal is set to the high logic level or the low logic level for the remaining time including the subsequent operation stage. Therefore, when the detection result terminal 2571 does not have the high logic level detection result signal, the D flip-flop 2661 holds the low logic level signal at the Q output terminal, thereby causing the detection result latch terminal 2561 to be low at the detection stage. The logic level detection result latch signal is held. On the other hand, once the detection result terminal 2571 has a high logic level detection result signal, the D flip-flop 2661 (for example, based on VCC) outputs and holds a high logic level signal from the Q output terminal. Thus, the detection result latch terminal 2561 similarly holds the high logic level detection result latch signal even in the operation stage.

  With reference to FIG. 15F, schematic switch circuits according to some embodiments of the present invention will be described. The switch circuit 2680 has a high current / high power processing capability, and includes a transistor such as a bipolar junction transistor (BJT) as a power transistor suitable for the switch circuit. The BJT 2681 may be referred to as a first transistor 2681. The BJT 2681 has a collector connected to the attachment detection terminal 2521, a base connected to the detection result latch terminal 2561, and an emitter connected to the switch circuit connection terminal 2581. When the detection pulse generation module 2640 generates the first and second pulse signals, the BJT 2681 enters a transient conduction state. Thereby, the detection determination circuit 2670 can perform detection for determining whether the detection result latch signal is set to a high logic level or a low logic level. When the detection result latch circuit 2660 outputs a high logic level detection result latch signal from the detection result latch terminal 2561, the BJT 2681 becomes conductive, and the attachment detection terminals 2521 and 2522 become conductive. On the other hand, when the detection result latch circuit 2660 outputs a low logic level detection result latch signal from the detection result latch terminal 2561, and the output from the detection pulse generation module 2640 is at a low logic level, the BJT 2681 is cut off or blocked, The detection terminals 2521 and 2522 are blocked or blocked.

  Since the external drive signal is an AC signal, the detection pulse generation module 2640 includes first and second detection pulses in order to avoid detection errors caused by the logic level of the external drive signal being just near zero when the detection determination circuit 2670 detects. A two-pulse signal is generated and the detection determination circuit 2670 performs detection twice. As a result, it is possible to avoid the problem that the logic level of the external drive signal is close to zero in one detection. In some cases, the time difference between the generation of the first pulse signal and the second pulse signal is not a multiple of a half cycle of the external drive signal. For example, this time difference does not coincide with a multiple of the 180 degree phase difference of the external drive signal. Thus, when one of the first and second pulse signals is generated and the external drive signal is unfortunately near zero, the external drive signal is again near zero when the other pulse signal is generated. Can be avoided.

  The time difference between the generation of the first pulse signal and the generation of the second pulse signal, for example, the specified time interval for generating both signals can be expressed by the following equation.

  Interval = (X + Y) (T / 2)

  Where T represents the period of the external drive signal, X is a natural number, satisfies 0 <Y <1, and in some embodiments, Y ranges from 0.05 to 0.95, and In such an embodiment, Y ranges from 0.15 to 0.85.

  Furthermore, when the drive voltage VCC reaches or exceeds the specified logic level in order to avoid a determination error of the attachment detection module entering the detection stage, which occurs because the logic level of the drive voltage VCC is too low. The first pulse signal can be set to be generated. For example, in some embodiments, the detection decision circuit 2670 is activated after the drive voltage VCC reaches a sufficiently high logic level to prevent misjudgment of the attachment detection module that occurs due to insufficient logic levels.

  According to the above-mentioned example, when one end cap of the LED straight tube lamp is inserted into the lamp socket and the other end cap is in the air or electrically connected to the human body or other grounded object, because of high impedance, The detection determination circuit outputs a low logic level detection result signal. The detection result latch circuit holds the low logic level detection result signal based on the pulse signal of the detection pulse generation module, so that the signal becomes a low logic level detection result latch signal even in the operation stage without changing its logic value. Holds detection results. As described above, the switch circuit is not in a continuous conduction state but maintains a cutoff or blocked state. Furthermore, an electric shock state can be prevented and the requirements of safety standards can be satisfied. On the other hand, when the two end caps of the LED straight tube lamp are correctly inserted into the lamp socket, the impedance of the circuit of the LED straight tube lamp itself is small, so the detection determination circuit outputs a high logic level detection result signal. The detection result latch circuit holds the high logic level detection result signal based on the pulse signal of the detection pulse generation module, and holds the detection result even in the operation stage using the signal as the high logic level detection result latch signal. In this way, the switch circuit maintains conduction, and the LED straight tube lamp operates normally in the operation stage.

  In some embodiments, when one end cap of the LED straight tube lamp is inserted into the lamp socket and the other end cap is in the air or electrically connected to the human body, the detection determination circuit detects the low logic level. The result signal is output to the detection result latch circuit, and then the detection pulse generation module outputs the low logic level signal to the detection result latch circuit, causing the detection result latch circuit to output the low logic level detection result latch signal, and the switch circuit. Is blocked or blocked. In this manner, the attachment detection terminals, for example, the first and second attachment detection terminals are brought into a blocked state by the switch circuit block. As a result, the LED straight tube lamp becomes non-conductive or blocked.

  However, in some embodiments, when the two end caps of the LED straight tube lamp are correctly inserted into the lamp socket, the detection determination circuit outputs a high logic level detection result signal to the detection result latch circuit, and the detection result The latch circuit outputs a high logic level detection result latch signal, and the switch circuit is turned on. In this manner, the attachment detection terminals, for example, the first and second attachment detection terminals are brought into a conduction state by the conduction of the switch circuit. As a result, the LED straight tube lamp operates in a conductive state.

  Therefore, when at least one end of the LED straight tube lamp is connected to the lamp socket according to the operation of the attachment detection module, the first circuit generates and outputs two pulses each having a pulse width at intervals. The first circuit may comprise the various elements described above configured to output a pulse to the base of a transistor that functions as a switch (eg, a BJT transistor). A pulse is generated during the detection phase to detect whether the LED straight tube lamp is properly connected to the lamp socket. The timing of pulse generation may be controlled based on the timing of various portions of the first circuit that change from a high logic level to a low logic level, or from a low logic level to a high logic level.

  The pulse timing is determined as follows. That is, during the detection phase, if the LED straight tube lamp is properly connected to the lamp socket (for example, if both ends of the LED straight tube lamp are correctly connected to the conductive terminals of the lamp socket), the drive signal When the alternating current is at a non-zero level, at least one pulse signal is generated. For example, the pulse signal may be generated at an interval different from the half cycle of the AC signal. For example, the time from the start points or the intermediate points of the pulse signals, or the time from the end of the first pulse signal to the start of the second pulse signal is different from the half period of the AC signal (for example, the AC signal May be between 0.05% and 0.95% of multiples of a half cycle). During the pulse that occurs when the AC signal is at a non-zero level, the switch that receives the non-zero level AC signal is switched on, and the switch remains on as long as the LED straight tube lamp remains properly connected to the lamp socket. The state is changed in the latch circuit so as not to change from the state. For example, the switch may be configured to be turned on when each pulse is output from the first circuit. The latch circuit may be configured to change state only when the switch is on, indicating that the current output from the switch is greater than a threshold, ie, properly connected to the lighting socket. As a result, the LED straight tube lamp operates in a conductive state.

  On the other hand, if both pulses occur when the driving signal of the LED straight tube lamp is close to zero or lower than a specific threshold, the state of the latch circuit does not change, and the switch is only in the period of two pulses. It is on and remains off after both pulses and after the detection mode. For example, the latch circuit can be configured to maintain the current state if the current output from the switch is less than a threshold. In this way, the LED straight tube lamp maintains a non-conductive state, thereby preventing an electric shock even if a part of the LED straight tube is connected to the power source.

  According to a specific embodiment, the width of the pulse signal generated by the detection pulse generation module is 10 μs to 1 ms, and the switch circuit is turned on for a short time when the LED straight tube lamp is turned on instantaneously. Used to make In some embodiments, the pulsed current is generated through a detection decision circuit for detection and decision. Since this pulse is a short time and not a long time, an electric shock state does not occur. Furthermore, during the operation phase (for example, the operation phase is a period after the detection stage and a part of the LED straight tube lamp is still connected to the power source), the detection result latch circuit also detects the detection result. Therefore, the detection result stored in advance according to the change of the circuit state is not changed. In this way, a situation caused by a change in the detection result can be avoided. In some embodiments, an attachment detection module such as a switch circuit, a detection pulse generation module, a detection result latch circuit, and a detection determination circuit are incorporated in a chip and then embedded in the circuit in order to reduce circuit cost and layout space. It is also possible.

  As described in the above example, in some embodiments, the LED straight tube lamp has two pulse signals: a first pulse signal output at a first time and a second time after the first time. A first circuit configured to output a second pulse signal output to the switch, and a switch configured to receive the two pulse signals for receiving an LED drive signal and controlling on and off of the switch And an attachment detection circuit. The attachment detection circuit may be configured to detect whether the LED straight tube lamp is properly connected to the lamp socket during each of the two pulse signals during the detection phase. If it is not detected during the period of either of the two pulse signals that the LED straight tube lamp is properly connected to the lamp socket, the switch may remain off after the detection phase. If it is detected during at least one of the two pulse signals that the LED straight tube lamp is properly connected to the lamp socket, the switch may remain on after the detection phase. The two pulse signals are generated such that they are separated by a time different from a multiple of a half period of the LED drive signal, and at least one of the pulse signals is not generated when the LED drive signal has a substantially zero current value. You may let them. Note that although a circuit for generating two pulse signals has been described, the present disclosure is not limited to such a circuit. For example, the circuit may generate a plurality of pulse signals, at least two of which are generated at different times than a multiple of a half cycle of the LED drive signal, and at least one of the plurality of pulse signals is It may be implemented so that it does not occur when the LED drive signal has a substantially zero current value.

  With reference to FIG. 15G, an attachment detection module according to an exemplary embodiment will be described. The attachment detection module includes a detection pulse generation module 2740 (may be called a detection pulse generation circuit or a first circuit), a detection result latch circuit 2760 (may be called a second circuit), and a switch circuit 2780 (may be called a third circuit). And a detection determination circuit 2770 (may be referred to as a fourth circuit). The detection pulse generation module 2740 is coupled (eg, electrically connected) to the detection result latch circuit 2760 via the path 2741 and is configured to generate at least one pulse signal. As used herein, a path may include a conductive wire connecting two components, circuits, or modules, or may include both ends of a conductive wire connected to each component, circuit, or module. . Detection result latch circuit 2760 is coupled (eg, electrically connected) to switch circuit 2780 via path 2761 and is configured to receive and output (one or more) pulse signals from detection pulse generation module 2740. ing. The switch circuit 2780 is connected (for example, electrically connected) to one end (for example, the first attachment detection terminal 2521) of the power supply loop of the LED straight tube lamp and the detection determination circuit 2770, and is output from the detection result latch circuit 2760 ( Configured to receive a pulse signal (one or more) and configured to energize (or turn on) the LED straight tube lamp power loop by conducting (or turning on) while receiving the pulse signal. Yes. The detection determination circuit 2770 is coupled (for example, electrically connected) to the switch circuit 2780, the other end of the power supply loop of the LED straight tube (for example, the second attachment detection terminal 2522), and the detection result latch circuit 2760. By detecting at least one sampling signal on the power supply loop when the power supply loop is in a conductive state, the mounting state of the LED straight tube lamp and the lamp socket is determined. Further, the detection determination circuit 2770 is configured to transmit the detection result (one or more) to the detection result latch circuit 2760 for the next control. In some embodiments, the detection pulse generation module 2740 is further coupled (eg, electrically connected) to the output of the detection result latch circuit 2760 to control the time of the pulse signal (s).

  In some embodiments, one end of the first path 2781 is coupled to the first node of the detection determination circuit 2770, and the other end of the first path 2781 is coupled to the first node of the switch circuit 2780. In some embodiments, the second node of the detection determination circuit 2770 is coupled to the second attachment detection terminal 2522 of the power supply loop, and the second node of the switch circuit 2780 is coupled to the first attachment detection terminal 2521 of the power supply loop. Is done. In some embodiments, one end of the second path 2771 is coupled to the third node of the detection determination circuit 2770, and the other end of the second path 2771 is coupled to the first node of the detection result latch circuit 2760. One end of the 3-path 2741 is connected to the second node of the detection result latch circuit 2760, and the other end of the third path 2741 is connected to the first node of the detection pulse generation circuit 2740. In some embodiments, one end of the fourth path 2761 is coupled to the third node of the switch circuit 2780, and the other end of the fourth path 2761 is coupled to the third node of the detection result latch circuit 2760. In some embodiments, the fourth path 2761 is also coupled to the second node of the detection pulse generation circuit 2740.

  In some embodiments, the detection determination circuit 2770 is configured to detect a signal between the first attachment detection terminal 2521 and the second attachment detection terminal 2522 via the first path 2781 and the switch circuit 2780. Yes. For example, with the above configuration, the detection determination circuit 2770 detects and determines whether the current flowing through the first attachment detection terminal 2521 and the second attachment detection terminal 2522 is smaller or larger than a predetermined current value, and determines the second path 2771. The detection result signal can be transmitted to or provided to the detection result latch circuit 2760.

  In some embodiments, the detection pulse generation circuit 2740 generates a pulse signal via the detection result latch circuit 2760 to operate the switch circuit 2780 in a conductive state during the pulse signal period. On the other hand, as a result, the power loop of the LED straight tube lamp between the attachment detection terminals 2521 and 2522 also becomes conductive. The detection determination circuit 2770 detects a sampling signal on the power supply loop, generates a signal based on the detection result, and latches the timing at which the detection result latch circuit 2760 latches the detection result received from the detection determination circuit 2770. Tell to circuit 2760. For example, the detection determination circuit 2770 is configured to generate a signal that maintains a latch circuit such as the detection result latch circuit 2760 in a state corresponding to either a conduction state or a cutoff state for the LED straight tube lamp. A circuit may be used. The detection result latch circuit 2760 holds the detection result in accordance with the detection result signal (or the detection result signal and the pulse signal), and enters the switch circuit 2780 connected to the third node of the detection result latch circuit 2760 via the fourth path 2761. , Send or provide detection results. The switch circuit 2780 receives the detection result transmitted from the detection result latch circuit via the third node of the switch circuit 2780, and controls the conduction or cutoff state between the attachment detection terminals 2521 and 2522 according to the detection result.

  Detailed circuit configurations and overall operations of the detection pulse generation module 2740 (or circuit), the detection result latch circuit 2760, the switch circuit 2780, and the detection determination circuit 2770 will be described below.

  A detection pulse generation module according to an exemplary embodiment will be described with reference to FIG. 15H. The detection pulse generation module 2740 includes a resistor 2742 (may be called a sixth resistor), a capacitor 2743 (may be called a fourth capacitor), a Schmitt trigger 2744, and a resistor 2745 (may be called a seventh resistor). And a transistor 2746 (may be called a second transistor) and a resistor 2747 (may be called an eighth resistor).

  In some embodiments, one end of resistor 2742 is connected to a drive signal, eg, VCC, and the other end of resistor 2742 is connected to one end of capacitor 2743. The other end of capacitor 2743 is connected to the ground node. In some embodiments, the Schmitt trigger 2744 has an input end and an output end, the input end is connected to the connection node of the resistor 2742 and the capacitor 2743, and the output end is detected via the third path 2741. It is connected to the result latch circuit 2760 (FIG. 15G). In some embodiments, one end of resistor 2745 is connected to the connection node between resistor 2742 and capacitor 2743, and the other end of resistor 2745 is connected to the collector of transistor 2746. The emitter of transistor 2746 is connected to the ground node. In some embodiments, one end of resistor 2747 is connected to the base of transistor 2746, and the other end of resistor 2747 is connected to detection result latch circuit 2760 (FIG. 15G) and switch circuit 2780 (FIG. 15G) via a fourth path 2761. Connected to. In certain embodiments, the detection pulse generation module 2740 further comprises a Zener diode 2748 having an anode and a cathode, where the anode is connected to the other grounded end of the capacitor 2743 and the cathode is the end of the capacitor 2743. (Connected node between resistor 2742 and capacitor 2743).

  A detection result latch circuit according to an exemplary embodiment will be described with reference to FIG. 15I. The detection result latch circuit 2760 has a data input terminal D, a clock input terminal CLK, and an output terminal Q. The data input terminal D is connected to the drive signal (for example, Vcc), and the clock input terminal CLK is a detection determination circuit. A D flip-flop 2762 (may be referred to as a second D flip-flop) connected to 2770 (FIG. 15G), a first input terminal, a second input terminal, and an output terminal, the first input terminal being a Schmitt trigger 2744 (FIG. 15H) is connected to the output terminal, the second input terminal is connected to the output terminal Q of the D flip-flop 2762, and the output terminal is connected to the other end of the resistor 2747 (FIG. 15H) and the switch circuit 2780 (FIG. 15G). And a connected OR gate 2763 (which may be referred to as a third OR gate).

  With reference to FIG. 15J, a switch circuit according to an exemplary embodiment will be described. The switch circuit 2780 has a base, a collector, and an emitter. The base is connected to the output of the OR gate 2762 via a fourth path 2761 (FIG. 15I). The emitter is connected to one end of the loop, and the emitter includes a transistor 2782 (which may be called a third transistor) connected to the detection determination circuit 2770 (FIG. 15G). In some embodiments, transistor 2782 may be replaced with other equivalent electronic components such as MOSFETs.

  A detection determination circuit according to an exemplary embodiment will be described with reference to FIG. 15K. The detection determination circuit 2770 may be referred to as a resistor 2774 (a ninth resistor) having one end connected to the emitter of the transistor 2782 (FIG. 15J) and the other end connected to the other end of the power supply loop such as the second attachment detection terminal 2522. ), An anode and a cathode, the anode being connected to one end of the resistor 2744 not connected to the ground node (may be referred to as a second diode), a first input terminal, a second input terminal, A comparator 2772 having an output terminal (may be called a second comparator), a comparator 2773 having a first input terminal, a second input terminal, and an output terminal (may be called a third comparator), and a resistor 2776. (May be referred to as a tenth resistor), a resistor 2777 (may be referred to as an eleventh resistor), and a capacitor 2778 (a fifth capacitor). Equipped with a call it may be) and.

  In some embodiments, the first input of the comparator 2772 is connected to a defined signal, eg, the reference voltage Vref = 1.3V, but the reference voltage value is not limited to this, and the second input of the comparator 2772 One end is connected to the cathode of the diode 2775, and the output end of the comparator 2772 is connected to the clock input end of the D flip-flop 2762 (FIG. 15I). In some embodiments, the first input of comparator 2773 is connected to the cathode of diode 2775, and the second input of comparator 2773 is connected to another defined signal, eg, reference voltage Vref = 0.3V. However, the reference voltage value is not limited to this, and the output terminal of the comparator 2773 is connected to the clock input terminal of the D flip-flop 2762 (FIG. 15I). In some embodiments, one end of resistor 2776 is connected to the drive signal (eg, Vcc), the other end of resistor 2776 is connected to the second input of comparator 2772, and one end of resistor 2777 is connected to the ground node. The other end of the resistor 2777 is connected to the ground node. In some embodiments, capacitor 2778 is connected in parallel with resistor 2777. In certain embodiments, the diode 2775, the comparator 2773, the resistors 2776, 2777, and the capacitor 2778 may be omitted, and if the diode 2775 is omitted, the second input of the comparator 2772 is the end of the resistor 2774 (eg, , The end of the resistor 2774 that is not connected to the ground node). In certain embodiments, resistor 2774 may comprise two resistors connected in parallel to account for power consumption corresponding to a resistance value in the range of about 0.1 ohm to about 5 ohm.

  In some embodiments, some portions of the attachment detection module may be incorporated into an integrated circuit (IC) to reduce circuit layout space and thereby reduce circuit manufacturing costs. For example, the Schmitt trigger 2744 of the detection pulse generation module 2740, the detection result latch circuit 2760, and the two comparators 2772 and 2773 of the detection determination circuit 2770 may be incorporated in the IC, but the present disclosure is not limited thereto.

  The operation of the attachment detection module will be described in further detail according to some exemplary embodiments. In an exemplary embodiment, the capacitor voltage does not change, the voltage of the capacitor in the power loop before the LED straight tube lamp power loop becomes conductive is zero, and the capacitor transient response has a short circuit condition. When the LED straight tube lamp is correctly installed in the lamp socket, the power tube of the LED straight tube lamp may have a smaller current limiting resistance and a larger peak current in the transient response. Well, when the LED straight tube lamp is not correctly mounted in the lamp socket, the power tube of the LED straight tube lamp may have a larger current limiting resistance and a smaller peak current in the transient response. In the present embodiment, the UL standard may be satisfied and the leakage current of the LED straight tube lamp may be less than 5 MIU. The table below shows that when the LED straight tube lamp is operating normally (for example, when the two end caps of the LED straight tube lamp are correctly installed in the lamp socket), the LED straight tube lamp is installed in the lamp socket. It shows a comparison of the current when not correctly attached (for example, when one end cap of an LED straight tube lamp is attached to a lamp socket but the other end cap is touching a human body).

In the denominator portion shown in the above table, R _fuse represents the resistance of the LED straight tube lamp fuse. For example, it may be used 10 ohm, as a resistance value of _{R fuse} in the calculation of the minimum transients _{i Pk_min,} the present disclosure is not limited thereto, a 510ohm as resistance of _{R fuse} in the calculation of the maximum transient current _{i Pk_max} May be used (to count 500 ohms to emulate the conduction resistance of a human body in a transient response). In the numerator, the maximum voltage obtained from the root mean square voltage (Vmax = Vrms * 1.414 = 305 * 1.414) is used to calculate the maximum transient current _{ipk_max} , and the minimum voltage difference, for example 50V (however, this disclosure) Is used for the calculation of the minimum transient current _{ipk_min} ). Thus, when the LED straight tube lamp is correctly installed in the lamp socket (eg, the two end caps of the LED straight tube lamp are correctly installed in the lamp socket) and operate normally, the minimum transient current is 5A. However, when the LED straight tube lamp is not correctly attached to the lamp socket (for example, when one end cap is attached to the lamp socket but the other is touching the human body), the maximum transient current is only 845 mA. Absent. Thus, in a particular example of the disclosed embodiment, the current flowing through a capacitor in an LED power loop, such as a filter circuit capacitor, through a transient response is used to determine the mounting condition of the LED straight tube lamp and the lamp socket. Detect and judge. For example, in such an embodiment, it may be detected whether the LED straight tube lamp is correctly attached to the lamp socket. Certain examples of the disclosed embodiments further provide a mechanism to protect against electric shock to a user who touches a conductive portion of an LED straight tube lamp that is not properly attached to the lamp socket. Although specific embodiments of the disclosed invention have been described using the above embodiments, the present disclosure is not limited to these embodiments.

  Further, referring again to FIG. 15G, in some embodiments, if an LED straight tube lamp is to be installed in the lamp socket after a period of time (eg, a period used to determine the period of the pulse signal), detection will occur. The pulse generation module 2740 outputs the first high level voltage increased from the first low level voltage to the detection result latch circuit 2760 through the path 2741 (also referred to as a third path). After receiving the first high level voltage, the detection result latch circuit 2760 outputs the second high level voltage simultaneously to the switch circuit 2780 and the detection pulse generation module 2740 through a path 2761 (also referred to as a fourth path). In some embodiments, when the switch circuit 2780 receives the second high level voltage, the switch circuit 2780 conducts, thereby bringing the power loop of the LED straight tube lamp into conduction. In the exemplary embodiment, the power supply loop includes at least a first attachment detection terminal 2521, a switch circuit 2780, a path 2781 (also referred to as a fifth path), a detection determination circuit 2770, and a second attachment detection terminal 2522. Including. On the other hand, the detection pulse generation module 2740 receives the second high-level voltage from the detection result latch circuit 2760, and after a certain period (for example, a period used to determine the width (or period) of the pulse signal), The output from the high level voltage drops to the first low level voltage (the first time of the first low level voltage, the first high level voltage, and the second time of the first low level voltage form the first pulse signal). . In some embodiments, the detection determination circuit 2770 detects a first sampling signal such as a voltage signal on the power supply loop when the power supply loop of the LED straight tube lamp is conductive. When the first sampling signal is greater than or equal to a prescribed signal such as a reference voltage, the attachment detection module is in accordance with the application principle of the disclosed embodiment described above and the LED straight tube lamp is correctly attached to the lamp socket. judge. Therefore, the detection determination circuit 2770 included in the attachment detection module outputs the third high level voltage (also referred to as the first high level signal) to the detection result latch circuit 2760 through the path 2771 (also referred to as the second path). The detection result latch circuit 2760 receives the third high level voltage (also referred to as the first high level signal) and continues to output the second high level voltage (also referred to as the second high level signal) to the switch circuit 2780. Switch circuit 2780 receives a second high level voltage (also referred to as a second high level signal) and maintains the conduction state, thereby leaving the power loop in a conduction state. While the power loop remains conductive, the detection pulse generation module 2740 does not generate any pulse signal.

  However, in some embodiments, when the first sampling signal is less than a defined signal, according to certain exemplary embodiments described above, the attachment detection module may cause the LED straight tube lamp to be correctly attached to the lamp socket. Judge that it is not. Therefore, the detection determination circuit 2770 outputs the third low level voltage (also referred to as a first low level signal) to the detection result latch circuit 2760. The detection result latch circuit 2760 receives the third low level voltage (also referred to as a first low level signal) and continues to output the second low level (also referred to as a second low level signal) to the switch circuit 2780. Switch circuit 2780 receives a second low level voltage (also referred to as a second low level signal) and maintains the block state to leave the power loop open. Therefore, it is possible to sufficiently avoid an electric shock caused by touching a conductive portion of an LED straight tube lamp that is not correctly attached to the lamp socket.

  In some embodiments, when the power loop of the LED straight tube lamp remains open for a period of time (a period that represents the period of the pulse signal), the detection pulse generation module 2740 increases the first low voltage from the first low level voltage. The high level voltage is output again to the detection result latch circuit 2760 through the path 2741. After receiving the first high level voltage, the detection result latch circuit 2760 outputs the second high level voltage to the switch circuit 2780 and the detection pulse generation module 2740 simultaneously. In some embodiments, when the switch circuit 2780 receives the second high level voltage, the switch circuit 2780 is turned on again, and the LED loop lamp power loop is also turned on (in this exemplary embodiment, The power supply loop includes at least a first attachment detection terminal 2521, a switch circuit 2780, a path 2781, a detection determination circuit 2770, and a second attachment detection terminal 2522). On the other hand, the detection pulse generation module 2740 receives the second high-level voltage from the detection result latch circuit 2760, and after a certain period (for example, a period used to determine the width (or period) of the pulse signal), The output from the high level voltage drops to the first low level voltage (the third pulse of the first low level voltage, the second time of the first high level voltage, and the fourth time of the first low level voltage are second pulses Signal). In some embodiments, when the power loop of the LED straight tube lamp becomes conductive again, the detection determination circuit 2770 also detects a second sampling signal such as a voltage signal on the power loop again. When the second sampling signal is equal to or greater than the prescribed signal, according to certain exemplary embodiments described above, the attachment detection module determines that the LED straight tube lamp is correctly installed in the lamp socket. . Therefore, the detection determination circuit 2770 outputs the third high level voltage (also referred to as the first high level signal) to the detection result latch circuit 2760 through the path 2771. The detection result latch circuit 2760 receives the third high level voltage (also referred to as the first high level signal) and continues to output the second high level voltage (also referred to as the second high level signal) to the switch circuit 2780. Switch circuit 2780 receives a second high level voltage (also referred to as a second high level signal) and maintains the conduction state, thereby leaving the power supply loop in a conduction state. While the power loop remains conductive, the detection pulse generation module 2740 does not generate any pulse signal.

  In some embodiments, when the second sampling signal is less than a defined signal, according to certain exemplary embodiments described above, the attachment detection module may not correctly attach the LED straight tube lamp to the lamp socket. Is determined. Therefore, the detection determination circuit 2770 outputs the third low level voltage (also referred to as a first low level signal) to the detection result latch circuit 2760. The detection result latch circuit 2760 receives the third low level voltage (also referred to as the first low level signal) and continues to output the second low level voltage (also referred to as the second low level signal) to the switch circuit 2780. Switch circuit 2780 receives a second low level voltage (also referred to as a second low level signal) and maintains the block state to leave the power loop open.

  Referring now to FIGS. 15H-15K simultaneously, in some embodiments, the capacitor 2743 is charged by a drive signal, eg, Vcc, through a resistor 2742 when attempting to attach an LED straight tube lamp to the lamp socket. . When the voltage of the capacitor 2743 increases to a level sufficient to activate the Schmitt trigger 2744, the Schmitt trigger 2744 generates a first high level voltage that has increased from the first low level voltage in the initial state of the OR gate 2766. Output to the input terminal. When OR gate 2773 receives the first high level voltage from Schmitt trigger 2744, OR gate 2763 outputs the second high level voltage to the base of transistor 2882 and resistor 2747. When the base of transistor 2882 receives the second high level voltage from OR gate 2763, the collector and emitter of transistor 2782 become conductive, and the power loop of the LED straight tube lamp (in the exemplary embodiment, the power loop is At least the first attachment detection terminal 2521, the transistor 2782, the resistor 2744, and the second attachment detection terminal 2522 are provided in the same manner. On the other hand, when the base of the transistor 2746 receives the second high level voltage from the OR gate 2766 through the resistor 2747, the collector and emitter of the transistor 2746 are brought into conduction and grounded, and the voltage of the capacitor 2743 is discharged through the resistor 2745 to the ground. Let In some embodiments, when the voltage on the capacitor 2743 is not at a level sufficient to activate the Schmitt trigger 2744, the Schmitt trigger 2744 outputs a first low level voltage that is reduced from the first high level voltage. (A first instance of a first low level voltage at a first time, followed by a first high level voltage, followed by a second instance of the first low level voltage at a second time forms a first pulse signal). When the power supply loop of the LED straight tube lamp is in a conducting state, a current passing through the capacitor of the power supply loop, such as the capacitor of the filter circuit, flows through the transistor 2784 and the resistor 2774 due to a transient response, and forms a voltage signal of the resistor 2774. The voltage signal is compared with a reference voltage by a comparator 2772. The reference voltage is 1.3 V, for example, but is not limited thereto. When the voltage signal is equal to or higher than the reference voltage, the comparator 2772 outputs the third high-level voltage to the clock input terminal CLK of the D flip-flop 2762. On the other hand, since the data input terminal D of the D flip-flop 2762 is connected to the drive signal, the D flip-flop 2762 outputs a high-level voltage (from the output terminal Q) to the other input terminal of the OR gate 2763. As a result, the OR gate 2763 continues to output the second high-level voltage to the base of the transistor 2787, and as a result, the transistor 2882 and the power supply loop of the LED straight tube lamp remain conductive. In addition, the OR gate 2763 continues to output the second high level voltage, causing the transistor 2746 to be conductive and grounded, so that the capacitor 2743 cannot reach a voltage sufficient to activate the Schmitt trigger 2744.

  However, when the voltage signal of the resistor 2774 is less than the reference voltage, the comparator 2772 outputs the third high level voltage to the clock input terminal CLK of the D flip-flop 2762. On the other hand, since the initial output of the D flip-flop 2762 is a low level voltage (for example, zero voltage), the D flip-flop 2762 outputs a low level voltage (from the output terminal Q) to the other input terminal of the OR gate 2766. In addition, the Schmitt trigger 2744 connected by the input of the OR gate 2773 also regains the first low level voltage output, and thus the OR gate 2773 will continue to output the second low level voltage to the base of the transistor 2782. As a result, the transistor 2782 remains in the blocked state (or off state), and the power loop of the LED straight tube lamp remains open. Furthermore, since the OR gate 2763 continues to output the second low-level voltage, the transistor 2746 remains in the blocked state (or off state), so that the capacitor 2743 has the resistance 2742 for the next (pulse signal) detection. It is charged again by the drive signal through

  In some embodiments, the period (or interval) of the pulse signal is determined by the values of resistor 2742 and capacitor 2743. In some cases, the period of the pulse signal may include a value in the range of about 3 milliseconds to about 500 milliseconds, and may be in the range of about 20 milliseconds to about 50 milliseconds. In some embodiments, the width (or period) of the pulse signal is determined by the values of resistor 2745 and capacitor 2743. In some cases, the width of the pulse signal may include a value in the range of about 1 microsecond to about 100 microseconds, and may be in the range of about 10 microseconds to about 20 microseconds. Zener diode 2748 provides a protective function, but may be omitted in some cases. In some cases, considering power consumption, resistor 2744 may comprise two resistors connected in parallel, and the equivalent resistance may include a value in the range of about 0.1 ohm to about 5 ohm. Since resistors 2776 and 2777 provide a voltage dividing function, the input of comparator 2773 is greater than the reference voltage. The value of the reference voltage is, for example, 0.3V, but is not limited to this. Capacitor 2778 provides regulation and filtering functions. Diode 2775 limits signal transmission in one direction. Furthermore, the mounting detection module disclosed by the exemplary embodiment is another type of LED luminaire with a dual-ended power source, for example, an LED lamp that directly uses a commercial power source as an external drive signal, stable as an external drive signal You may adapt to the LED lamp etc. which use the signal output from the device. However, the invention is not limited to the exemplary embodiments described above.

  According to some embodiments, the present invention further provides a detection method employed by the LED straight tube lamp to prevent a user's electric shock when mounting the LED (light emitting device) straight tube lamp on the lamp socket. . The detection method includes a step of generating a first pulse signal by a detection pulse generation module configured in the LED straight tube lamp, and a switch circuit on a power supply loop of the LED straight tube lamp, through a detection result latch circuit. Receiving the first pulse signal and maintaining the conductive state of the switch circuit during the period of the first pulse signal to bring the power loop into a conductive state; and when the power loop is in a conductive state, Detecting a first sampling signal on the power supply loop by a detection determination circuit and comparing the first sampling signal with a prescribed signal, and when the first sampling signal is greater than or equal to the prescribed signal The detection method further includes the step of outputting a first high level signal by the detection determination circuit; and Receiving the first high level signal by the output result latch circuit and outputting the second high level signal; receiving the second high level signal by the switch circuit; Leaving the step.

  In some embodiments, when the first sampling signal is smaller than the prescribed signal, the detection method further includes the step of outputting a first low level signal by the detection determination circuit, and the detection result latch circuit by the detection result latch circuit. Receiving a first low level signal and outputting a second low level signal; receiving the second low level signal by the switch circuit; and maintaining the switch circuit in an OFF state to open the power supply loop. Leaving the state.

  In some embodiments, when the power supply loop remains open, the detection method further includes generating a second pulse signal by the detection pulse generation module, and the detection result latch circuit by the switch circuit. Receiving the second pulse signal through the second pulse signal and changing the switch circuit off to a conductive state again during the period of the second pulse signal to re-energize the power loop; and A second sampling signal on the power supply loop is detected by the detection determination circuit when it becomes conductive again, and the second sampling signal is compared with the prescribed signal. When the signal is larger than or equal to the prescribed signal, the detection method further includes the detection determination circuit. A step of outputting a first high level signal; a step of receiving the first high level signal by the detection result latch circuit; and a step of outputting the second high level signal; and the second high level signal by the switch circuit. And keeping the power loop in a conducting state by maintaining the conducting state of the switch circuit.

  In some embodiments, when the second sampling signal is smaller than the specified signal, the detection method further includes the step of outputting the first low-level signal by the detection determination circuit, and the detection result latch circuit. Receiving the first low level signal and outputting the second low level signal; receiving the second low level signal by the switch circuit and maintaining the switch circuit in an off state; Leaving the open state.

  In some embodiments, the duration (or width) of the first pulse signal is between 10 microseconds and 1 millisecond, and the duration (or width) of the second pulse signal is between 10 microseconds and 1 millisecond. Between.

  In some embodiments, when T is the period of the drive signal, X is an integer greater than or equal to zero, and 0 <Y <1, the time interval from the first pulse signal to the second pulse signal is (X + Y ) (T / 2).

  In some embodiments, the duration (or width) of the first pulse signal is between 1 microsecond and 100 microseconds, and the duration (or width) of the second pulse signal is between 1 microsecond and 100 microseconds. Between.

  In some embodiments, the time interval from the first pulse signal to the second pulse signal (or the period of the pulse signal) is between 3 milliseconds and 500 milliseconds.

  In some embodiments, at least two protective components, eg, two fuses, are each connected between the LED straight tube lamp internal circuit and the LED straight tube lamp conductor pin on the LED straight tube lamp power loop. Is done. In some embodiments, four fuses are used in LED straight tube lamps that are powered by end caps at both ends, each having two conductor pins. In this case, for example, two fuses are respectively connected between the two conductor pins of one end cap and between one of the two conductor pins of the end cap and the internal circuit of the LED straight tube lamp, and the rest Are connected between the two conductor pins of the other end cap and between one of the two conductor pins of the end cap and the internal circuit of the LED straight tube lamp. In some embodiments, the capacitance between the power supply (or external drive source) and the straight tube lamp rectifier circuit may be in the range of 0 to about 100 pF. In some embodiments, the attachment detection module described above may be configured to use an external power source.

  According to the design of the power supply module, the external drive signal is supplied to the LED straight tube lamp through the drive structure of the dual end power supply, and is supplied by a low frequency AC signal (for example, commercial power supply), a high frequency AC signal (for example, an electronic ballast). Or a direct current signal (for example, a signal supplied from a battery or an externally configured drive source). Also in the drive structure of a dual end power supply, an external drive signal may be input using only one end as a single end power supply.

  When the external drive signal is a DC signal, the rectifier circuit in the power supply module may be omitted.

  Depending on the design of the rectifier circuit in the power supply module, there may be a dual rectifier circuit. Each of the first and second rectifier circuits of the dual rectifier circuit is connected to two end caps arranged at both ends of the LED straight tube lamp. The dual rectifier circuit can be applied to a drive structure of a dual end power supply. Furthermore, the LED straight tube lamp having at least one rectifier circuit can be applied to a driving structure for a low-frequency AC signal, a high-frequency AC signal, or a DC signal.

  The dual rectifier circuit may include, for example, two half-wave rectifier circuits, two full-wave bridge rectifier circuits, or one half-wave rectifier circuit and one full-wave bridge rectifier circuit.

  According to the design of the pins in the LED straight tube lamp, there are two pins at one end (no pins at the other end), two pins at the corresponding ends at both ends, or four pins at the corresponding ends at both ends. There may be. The design of two pins at one end and two pins at the corresponding ends at both ends is applicable to a single rectifier circuit design of the rectifier circuit. The four pin design at the corresponding end of both ends is applicable to the dual rectifier circuit design of the rectifier circuit, and the external drive signal is either one of the two pins at one end or each of the two ends It is possible to receive with the pin.

  According to the design of the filter circuit of the power supply module, there may be one capacitor or π filter circuit. Since the filter circuit provides a DC signal having a low ripple voltage as a filter signal, the high-frequency component of the rectified signal is removed by filtering. The filter circuit further includes an LC filter circuit having a high impedance with respect to the specific frequency in order to conform to the current limitation at the specific frequency of the UL standard. Furthermore, the filter circuit according to some embodiments includes a rectifier circuit (s) to reduce electromagnetic interference (EMI) due to the circuit (s) of the LED straight tube lamp. A filter unit connected between the pins is provided. The LED straight tube lamp may omit the filter circuit in the power supply module when the external drive signal is a DC signal.

  According to the LED lighting module design in some embodiments, the LED lighting module comprises only an LED module and a drive circuit, or an LED module. In order to prevent overvoltage of the LED module, the LED module may be connected in parallel with the voltage stabilizing circuit. The voltage stabilization circuit may be a voltage clamp circuit such as a Zener diode or DIAC. If the rectifier circuit has a capacitive circuit, in some embodiments, two capacitors are coupled between the two corresponding pins of each of the two end caps, and the two capacitors are voltage regulated. The capacitive circuit as a circuit functions as a capacitive voltage divider.

  If there is only an LED module in the LED lighting module and the external drive signal is a high-frequency AC signal, the capacitor can be regarded as equivalent to a resistor for high-frequency signals, so that a capacitive circuit (for example, including at least one capacitor) has at least one In the rectifier circuit, the capacitive circuit is connected in series with the half-wave rectifier circuit or full-wave bridge rectifier circuit of the rectifier circuit, and functions as a current modulation circuit (or current regulator), so that the current of the LED module is Modulate or adjust. Thus, even if different ballasts provide high frequency signals of different voltage logic levels, the LED module current can be modulated into a predetermined current range to prevent overcurrent. In addition, the energy release circuit is connected in parallel with the LED module. When the external drive signal is no longer supplied, the energy emission circuit releases the energy stored in the filter circuit, thereby reducing the resonance effect of the filter circuit and other circuits and suppressing the flickering of the LED module. In some embodiments, if the LED lighting module includes an LED module and a drive circuit, the drive circuit may be a buck converter, a boost converter, or a buck-boost converter. The drive circuit stabilizes the current of the LED module to a specified current value, but the specified current value may be modulated based on an external drive signal. For example, the specified current value may be increased with an increase in the logic level of the external drive signal, or may be decreased with a decrease in the logic level of the external drive signal. Further, a mode switching circuit may be added between the LED module and the driving circuit in order to switch the current from the filter circuit to the input to the LED module directly or through the driving circuit.

  In order to protect the LED module, a protection circuit may be further added. The protection circuit detects the current and / or voltage of the LED module to determine whether the corresponding overcurrent and / or overvoltage protection is possible.

  According to the design of the auxiliary power module of the power module, the energy storage unit may be a battery or a super capacitor connected in parallel to the LED module. The auxiliary power supply module can be applied to an LED lighting module having a drive circuit.

  According to the LED module design of the power module, the LED module comprises a plurality of columns connected in parallel to each other, each including a plurality of LEDs, each LED having a single LED chip or a plurality of emitting different spectra. You may have a LED chip. Each LED in a different LED string may be connected to each other to form a mesh connection.

  That is, the various features described above can be implemented in any combination for improving the LED straight tube lamp.

  The above-described exemplary features of the present invention can be achieved in any combination for improving the LED straight tube lamp, but the above-described embodiment is merely described as an example. The present invention is not limited to the description in the present specification, and various modifications can be made without departing from the spirit of the present invention and the scope defined in the appended claims.

Claims (15)

A detection method employed by the LED straight tube lamp to prevent an electric shock of a user when mounting an LED (light emitting element) straight tube lamp on a lamp socket,
Generating a first pulse signal by a detection pulse generation module configured in the LED straight tube lamp;
The switch circuit on the power loop of the LED straight tube lamp receives the first pulse signal through a detection result latch circuit, and maintains the conduction state of the switch circuit during the period of the first pulse signal. Making the power loop conductive; and
Detecting a first sampling signal on the power supply loop by a detection determination circuit when the power supply loop is in a conductive state, and comparing the first sampling signal with a prescribed signal;
When the first sampling signal is greater than or equal to the defined signal, the detection method further comprises:
Outputting a first high level signal by the detection determination circuit;
Receiving the first high level signal by the detection result latch circuit and outputting a second high level signal;
Receiving the second high-level signal by the switch circuit and making the power supply loop conductive by conducting the detection. When the first sampling signal is smaller than the prescribed signal, the detection method further comprises:
Outputting a first low level signal by the detection determination circuit;
Receiving the first low level signal by the detection result latch circuit and outputting a second low level signal;
The detection method according to claim 1, further comprising: receiving the second low-level signal by the switch circuit, and maintaining the power supply loop in an open state by maintaining the switch circuit in an OFF state. When the power loop remains open, the detection method further comprises:
Generating a second pulse signal by the detection pulse generating module;
The switch circuit receives the second pulse signal through the detection result latch circuit, and changes the power supply loop to the conductive state again by changing the OFF state of the switch circuit to the conductive state again during the period of the second pulse signal. Step to
Detecting a second sampling signal on the power supply loop by the detection determination circuit when the power supply loop becomes conductive again, and comparing the second sampling signal with the prescribed signal;
When the second sampling signal is greater than or equal to the defined signal, the detection method further comprises:
Outputting the first high level signal by the detection determination circuit;
Receiving the first high level signal by the detection result latch circuit and outputting the second high level signal;
The detection method according to claim 2, further comprising: receiving the second high-level signal by the switch circuit, and maintaining the power supply loop in a conductive state by maintaining the conductive state of the switch circuit. When the second sampling signal is smaller than the prescribed signal, the detection method further includes:
Outputting the first low level signal by the detection determination circuit;
Receiving the first low level signal by the detection result latch circuit and outputting the second low level signal;
The detection method according to claim 3, further comprising: receiving the second low-level signal by the switch circuit and maintaining the power supply loop in an open state by maintaining the OFF state of the switch circuit. The detection method according to claim 3, wherein the period of the first pulse signal is between 10 microseconds and 1 millisecond, and the period of the second pulse signal is between 10 microseconds and 1 millisecond. When T is the period of the drive signal, X is an integer greater than or equal to zero, and 0 <Y <1, the time interval from the first pulse signal to the second pulse signal is (X + Y) (T / 2). The detection method according to claim 5. The detection method according to claim 3, wherein the period of the first pulse signal is between 1 microsecond and 100 microseconds, and the period of the second pulse signal is between 1 microsecond and 100 microseconds. The detection method according to claim 7, wherein a time interval from the first pulse signal to the second pulse signal is between 3 milliseconds and 500 milliseconds.   Comparing the first sampling signal with a prescribed signal comprises:
  Comparing a current value of a current flowing through the power supply loop with a specific current value.
  The detection method according to claim 1.   Comparing the first sampling signal with a prescribed signal comprises:
  Comparing a voltage on the power loop with a reference voltage.
  The detection method according to claim 1.   When the first sampling signal is smaller than the prescribed signal, the detection method further comprises:
  Limiting the current on the power loop to less than 5 MIU (Measurement Indication Units)
  The detection method according to claim 1. When the power supply loop remains open by maintaining an off state of the switch circuit, the detection method further includes:
Generating a second pulse signal by the detection pulse generating module;
The switch circuit receives the second pulse signal through the detection result latch circuit, and changes the power supply loop to the conductive state again by changing the OFF state of the switch circuit to the conductive state again during the period of the second pulse signal. Step to
Detecting a second sampling signal on the power supply loop by the detection determination circuit when the power supply loop becomes conductive again, and comparing the second sampling signal with the prescribed signal;
When the second sampling signal is greater than or equal to the defined signal, the detection method further comprises:
Outputting the first high level signal by the detection determination circuit;
Receiving the first high level signal by the detection result latch circuit and outputting the second high level signal;
Receiving the second high level signal by the switch circuit and keeping the power loop in a conductive state by maintaining a conductive state of the switch circuit;
When the second sampling signal is smaller than the prescribed signal, the detection method further includes:
The detection method according to claim 11, comprising limiting the current on the power supply loop to less than 5 MIU. The detection method further includes:
When the detection pulse generating module receives a drive signal, raising the first pulse signal to a high level voltage;
Feeding back the first pulse signal to the discharge path of the detection pulse generating module, thereby causing the discharge path to conduct when the first pulse signal is pulled up to the high level voltage;
The detection method according to claim 1, further comprising: lowering the first pulse signal to a low level voltage after conducting the discharge path for a predetermined period.   At least a Schmitt trigger of the detection pulse generation module, the detection result latch circuit, and two comparators of the detection determination circuit are incorporated in an IC (Integrated Circuit).
  The detection method according to claim 1.   The LED straight tube lamp is driven by an AC signal applied to both ends of the LED straight tube lamp.
  The detection method according to claim 1.

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