CN101651125B - Light-emitting diode base structure with embedded capacitor - Google Patents

Abstract

The invention relates to a light-emitting diode seat structure with an embedded capacitor, which comprises: it includes: a body; at least one pair of metal layers; at least one dielectric layer; and at least two conductive paths. The body is an insulating base, the metal layer is arranged in the body, the dielectric layer is formed between the pair of metal layers to form the embedded capacitor, and the conductive channels are respectively electrically connected with the metal layer. When the LED base structure is electrically connected with a resistor, a resistor-capacitor delay circuit can be formed, and the effect of phase delay can be generated when an alternating current power supply is used, so that the on-time of one of two groups of LED groups which are connected in parallel can be controlled, and the problem of LED flicker when the alternating current power supply is used can be improved.

Description

Light-emitting diode base structure with embedded capacitor

technical field

The present invention relates to a light-emitting diode (i.e. diode, hereinafter referred to as diode) body structure with embedded capacitors, in particular to a light-emitting diode with embedded capacitors that is applied to an AC power supply as a power source Seat structure.

Background technique

Due to the rapid development and maturity of light-emitting diode technology, and light-emitting diodes have the advantages of small size, low power consumption, fast response rate, long life and good shock resistance, light-emitting diodes have gradually replaced traditional halogen lamps and fluorescent tubes. It has become an emerging light source in future lighting devices.

However, since the light-emitting diode is designed to be electrically turned on and emit light only when it is forward biased, if the light-emitting diode is driven by the AC power of the mains, due to the periodicity of the AC power, the light-emitting diode will flicker. Phenomenon, resulting in application difficulties, so most of the light-emitting diodes are currently limited to only use DC power to drive light.

For example, in the LED lighting device disclosed in the invention No. I287607 of the Republic of China, the LED lighting device for alternating current and the light-emitting unit therein, an AC power source is used as its power supply source, and the AC power source has a forward voltage and a Reverse voltage, the light emitting diode lighting device includes: a light emitting unit, the light emitting unit at least includes a first light emitting diode chip and a second light emitting diode chip, the light emitting diode chips are connected in parallel and the conduction directions of the two are opposite, the forward voltage is used to turn on the first light emitting diode chip, and the reverse voltage is used to turn on the second light emitting diode chip.

The two LED chips used in the above-mentioned prior art are connected in parallel, and the conduction directions of the two LED chips are opposite. Therefore, when the AC power is input, the two LED chips will alternately emit light in turn, so that they can be used directly. AC power for lighting.

FIG. 1A is a relationship diagram between an AC power source AC and a critical voltage Vth when an AC power source is input to a conventional light-emitting diode base structure. When the light-emitting diode is working, in fact, the voltage value for driving the light-emitting diode must be greater than the critical voltage Vth of the light-emitting diode to drive the light-emitting diode to emit light. Therefore, when the voltage polarity of the AC power source is switched, it takes a waiting time Tth to wait for the voltage to rise to the critical voltage Vth before the LED is turned on and emits light.

FIG. 1B is a light emitting sequence diagram of the light emitting diode when the AC power supply AC is input to the conventional light emitting diode base structure. When two light-emitting diodes LED1 and LED2 are used to emit light, there will be a waiting time Tth in the light-emitting time T1 and T2. Therefore, when the two light-emitting diodes LED1 and LED2 alternately emit light, light discontinuity will occur, resulting in the problem of flickering, which limits the The application of the light-emitting diodes LED1 and LED2 in the AC environment of the AC power supply.

It can be seen that the above-mentioned existing light-emitting diode base structure obviously still has inconvenience and defects in structure and use, and needs to be further improved urgently. In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and the general products do not have a suitable structure to solve the above-mentioned problems. This is obviously the relevant industry. urgent problem to be solved. Therefore, how to create a new type of light-emitting diode base structure with embedded capacitors is one of the current important research and development topics, and it has also become a goal that the industry needs to improve.

In view of the defects of the above-mentioned existing light-emitting diode base structure, the inventors actively researched and innovated based on years of rich practical experience and professional knowledge engaged in the design and manufacture of such products, and cooperated with the application of academic theories, in order to create a new type of light-emitting diode. The light-emitting diode base structure with embedded capacitors can improve the general existing light-emitting diode base structure and make it more practical. Through continuous research, design, and after repeated trial samples and improvements, the present invention with practical value is finally created.

Contents of the invention

The object of the present invention is to overcome the defects existing in the existing light-emitting diode body structure, and provide a new type of light-emitting diode body structure with embedded capacitors. The technical problem to be solved is to make it Two metal layers are buried in the middle, and a dielectric layer is formed therein to form an embedded capacitor. The embedded capacitor can be combined with an external resistor to form a resistor-capacitor delay circuit. If a plurality of light emitting diodes are combined in the structure of the light emitting diode body and an AC power source is used, the flickering problem caused by the voltage polarity change of the AC power source can be controlled separately by using a delay circuit. driving time, thereby improving the flickering phenomenon of the LED.

The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions. According to the present invention, a light-emitting diode base structure with embedded capacitors is characterized in that it includes: a body, which is an insulating base; at least a pair of metal layers, which are arranged in the body; at least one A dielectric layer is formed between the pair of metal layers; and at least two conductive channels are respectively electrically connected to the metal layers.

The purpose of the present invention and its technical problems can also be further realized by adopting the following technical measures.

In the aforementioned light-emitting diode base structure with embedded capacitors, the body is formed by stacking multiple ceramic layers.

In the aforementioned light-emitting diode base structure with embedded capacitors, the body has a groove.

In the aforementioned light-emitting diode base structure with embedded capacitors, the material of the body is aluminum oxide, quartz, silicon dioxide, calcium zirconate or glass ceramics.

In the aforementioned light-emitting diode base structure with embedded capacitors, the material of the dielectric layer is silicon dioxide, barium titanate or a ceramic layer.

The aforementioned light-emitting diode base structure with embedded capacitors further has at least one pair of electrodes, and a first end of each electrode is exposed on a bottom surface of a groove of the body, and each of the electrodes A second end is buried in the body, and one of the second end is electrically connected with a conductive channel.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. By virtue of the above-mentioned technical solutions, the light-emitting diode base structure with embedded capacitors of the present invention has at least the following advantages and beneficial effects:

1. The light-emitting diode base structure has a built-in capacitor, so there is no need to connect additional capacitor components.

2. Capacitors are buried in the manufacturing process of the light-emitting diode base structure, which reduces the cost and the capacitance can be designed according to requirements.

3. Due to the embedded capacitor, the application range of the light-emitting diode base structure will be wider.

To sum up, the present invention is an LED base structure with embedded capacitors, which includes: a body; at least one pair of metal layers; at least one dielectric layer; and at least two conductive channels. The main body is an insulating base, and the metal layer is disposed in the main body, and the dielectric layer is formed between the pair of metal layers to form an embedded capacitor, and the conductive channels are respectively electrically connected to the metal layer. When the light-emitting diode base structure is electrically connected with a resistor, a resistance-capacitance delay circuit can be formed, and the effect of phase delay can be generated when using an AC power supply to control one of the two parallel-connected light-emitting diode groups. The turn-on time of the group can improve the problem of LED flickering when using AC power. The present invention has the above-mentioned many advantages and practical value, it has great improvement no matter in product structure or function, has remarkable progress in technology, and has produced easy-to-use and practical effect, and compared with existing light-emitting diode holder The body structure has enhanced outstanding functions, so it is more suitable for practical use, and it is a novel, progressive and practical new design.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

FIG. 1A is a diagram showing the relationship between the AC power and the critical voltage when the AC power is input to the conventional light-emitting diode base structure.

FIG. 1B is a timing diagram of light emitting diodes when the conventional light emitting diode base structure is input with AC power.

FIG. 2 is a diagram of an embodiment of the structure of a light-emitting diode base with embedded capacitors according to the present invention.

Fig. 3 is a cross-sectional embodiment diagram 1 along the section line A-A in Fig. 2 .

Fig. 4 is a second cross-sectional embodiment diagram along the section line A-A in Fig. 2 .

FIG. 5A is an embodiment of an LED base structure with embedded capacitors combined with LEDs according to the present invention.

FIG. 5B is an equivalent circuit diagram of the circuit structure in FIG. 5A.

FIG. 5C is a graph showing the relationship between the AC power and the critical voltage when the AC power is input in FIG. 5B .

FIG. 5D is a timing diagram of light emitting diodes in FIG. 5B when AC power is input.

10: Light-emitting diode base structure with embedded capacitors

11: Body 12: Metal layer

13: Dielectric layer 14: Conductive channel

15: Groove 16: Electrode

161: first end 162: second end

17: Power electrode Ci: Embedded capacitor

AC: AC Power R: Resistance

LED1, LED-2, LED3, LED-4: Light-emitting diodes

T1, T2, T3, T4: Lighting time Tth: Waiting time

Vth: critical voltage T: delay time

Detailed ways

In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation of the light-emitting diode base structure with embedded capacitors proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. , structure, feature and effect thereof, detailed description is as follows.

The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of preferred embodiments with reference to the drawings. Through the description of the specific implementation mode, when the technical means and functions adopted by the present invention to achieve the predetermined purpose can be obtained a deeper and more specific understanding, but the accompanying drawings are only for reference and description, and are not used to explain the present invention be restricted.

FIG. 2 is a diagram of an embodiment of an LED base structure 10 with an embedded capacitor Ci according to the present invention. Fig. 3 is a cross-sectional embodiment diagram 1 along the section line A-A in Fig. 2 . Fig. 4 is a second cross-sectional embodiment diagram along the section line A-A in Fig. 2 . FIG. 5A is an embodiment of an LED base structure 10 with embedded capacitor Ci combined with LEDs LED1 , LED-2 , LED3 , and LED-4 according to the present invention. FIG. 5B is an equivalent circuit diagram of the circuit structure in FIG. 5A. FIG. 5C is a graph showing the relationship between the AC power supply AC and the critical voltage Vth when the AC power supply AC is input in FIG. 5B . FIG. 5D is a timing diagram of light emitting diodes LED1 , LED- 2 , LED3 , and LED- 4 in FIG. 5B when AC power is input.

Please refer to FIG. 2 and FIG. 3 , the present embodiment is a light emitting diode base structure 10 with embedded capacitance Ci, including: a body 11; at least one pair of metal layers 12; at least one dielectric layer 13; And at least two conductive channels 14 .

The above-mentioned body 11 constitutes the package of the light-emitting diode base structure 10 with embedded capacitance Ci, and the body 11 is an insulating base, and one embodiment can be formed by stacking a plurality of ceramic layers, and the body The material of 11 can be aluminum oxide, quartz, silicon dioxide, calcium zirconate or ceramics.

The body 11 not only includes a plurality of ceramic layers, but also covers the metal layer 12 , the dielectric layer 13 and the conductive channel 14 . And the main body 11 is formed with a groove 15 as a die-bonding area. When the main body 11 is combined with the LEDs, the groove 15 can accommodate a plurality of LEDs LED1, LED-2, LED3, and LED-4.

Please refer to FIG. 3 and FIG. 4 , the metal layer 12 is disposed in the body 11 , and the LED base structure 10 with the embedded capacitor Ci includes one or two pairs of metal layers 12 . Each pair of metal layers 12 can be embedded in any position in the body 11 , and the two metal layers 12 in each pair of metal layers 12 are vertically arranged in parallel. When multiple ceramic layers are stacked to form the body 11 , the metal layer 12 can be easily placed between different ceramic layers in order to form the embedded capacitor Ci.

The above-mentioned dielectric layer 13 is formed between each pair of metal layers 12 . Therefore, when one or two pairs of metal layers 12 are embedded in the light emitting diode base structure 10 with embedded capacitance Ci, the body 11 may have one or two dielectric layers 13 respectively, so that each pair of metal layers 12 The two metal layers 12 are electrically isolated. And the material of the dielectric layer 13 can be aluminum oxide, quartz, silicon dioxide, calcium zirconate or ceramics. When the dielectric layer 13 is disposed between the two metal layers 12 , the embedded capacitance Ci of the metal layer 12 -dielectric layer 13 -metal layer 12 is formed in the light emitting diode base structure. And when the dielectric layer is made of the same material as the body, the process will be more efficient.

The above-mentioned conductive channel 14 is formed in the body 11 and can be used to electrically connect with each metal layer 12 respectively, so as to serve as an electrode of the embedded capacitor Ci. When a pair of metal layers 12 are buried in the LED base structure 10 with embedded capacitor Ci, the body 11 may have at least two conductive channels 14 for electrically connecting with each metal layer 12 respectively. Likewise, when two pairs of metal layers 12 are embedded in the body 11 , at least four conductive channels 14 are electrically connected to each metal layer 12 respectively. When there is more than one embedded capacitor Ci in the body 11 , they can be connected in parallel or in series by setting the conductive channel 14 to adjust the total capacitance value.

The capacitance value generated by the embedded capacitor Ci can be calculated by the following equation:

C=(ε0×A)/D

Wherein, C is the capacitance value of the embedded capacitor Ci, ε0 is the dielectric constant in vacuum, A is the area of each metal layer 12 and D is the distance between two metal layers 12 . For example, when the distance between the two metal layers 12 is closer or the metal layer 12 has a larger area, more charges can be accumulated, so that the embedded capacitor Ci generates a larger capacitance value. Conversely, if the distance between the metal layers 12 is farther or the area of the metal layer 12 is smaller, the accumulated charge quantity is smaller, so that the embedded capacitor Ci forms a smaller capacitance value.

In addition, the LED base structure 10 with the embedded capacitor Ci may further have at least one pair of electrodes 16 , and each electrode 16 has a first end portion 161 and a second end portion 162 . Each first end portion 161 is exposed on the bottom surface of the groove 15 of the body 11 for wire bonding, and each second end portion 162 is embedded in the body 11, and one of the second end portions 162 is connected by one of the The conductive channel 14 is electrically connected to one of the metal layers 12 in the embedded capacitor Ci. And one of the conductive channels 14 is connected to an external power electrode 17 to provide power to drive the LED base structure 10 of the embedded capacitor Ci.

In order to fully illustrate the efficacy of this embodiment, the following application examples are given for illustration:

Please refer to FIG. 5A and FIG. 5B, when there are four light-emitting diodes LED1, LED-2, LED3, and LED-4 solidified in the light-emitting diode base structure 10 with embedded capacitor Ci, the four light-emitting diodes LED1 , LED-2, LED3, LED-4 will be accommodated in the groove 15 of the body 11 . And two groups of light emitting diode groups connected in parallel are formed, and each light emitting diode group is composed of a forward conducting light emitting diode LED1, LED3 and a negative conducting light emitting diode LED-2, LED-4.

When an AC power source is used, one group of LEDs LED3 , LED4 and the bonding wire are electrically connected to the first end 161 of one of the electrodes 16 . And the second end 162 of one of the electrodes 16 is electrically connected to one of the metal layers 12 of the embedded capacitor Ci through one of the conductive channels 14, so that one of the light-emitting diode groups LED3, LED4 and the embedded capacitor Ci will be connected electrically. The capacitors are electrically connected. The other group of light-emitting diodes LED1 and LED2 are not electrically connected to the embedded capacitor Ci.

After the embedded capacitor Ci is combined with a resistor R, a resistor R-capacitor delay circuit can be formed, and the capacitance value of the embedded capacitor Ci can be adjusted by the distance and area of the metal layer 12, so that the resistor R-capacitor delay circuit Different delay phases, such as 45 degrees and 90 degrees, can be generated by adjusting the capacitance value of the embedded capacitor Ci.

As shown in FIG. 5C, when an AC power supply AC is input into the LED base structure 10 with embedded capacitor Ci, the two LEDs LED1 and LED-2 that are not connected to the resistor-capacitor delay circuit, The luminous time is T1, T2. The other two light-emitting diodes LED3 and LED-4 are connected in series with the resistor-capacitor delay circuit, so that they will be turned on to emit light after a delay time T, so their light-emitting time will be T3 and T4.

Please refer to Fig. 5D, since the light-emitting time T1, T2 of the light-emitting diodes LED1, LED-2 cooperates with the light-emitting time T3, T4 of the light-emitting diodes LED3, LED-4, so that when any of the light-emitting diodes LED1, LED -2. When LED3 and LED-4 are in the waiting time Tth, the other light-emitting diodes LED1, LED-2, LED3 and LED-4 will continue to emit light, so the whole will show a constant light state. Therefore, after the LEDs LED1, LED-2, LED3, and LED-4 are combined with the LED base structure 10 having the embedded capacitor Ci, the flickering phenomenon when using the AC power supply AC can be improved.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but all the content that does not depart from the technical solution of the present invention, according to the present invention Any simple modifications, equivalent changes and modifications made to the above embodiments by the technical essence still belong to the scope of the technical solutions of the present invention.

Claims (4)

1. light-emitting diode base structure with buried capacitor is characterized in that it comprises:

One body, it is an insulating base, and this body has a groove;

At least one pair of metal level, it is arranged in this body;

At least one dielectric layer, it is formed at this between the metal level;

At least two conductive channels, it electrically connects those metal levels respectively; And

At least one pair of electrode, an and first end of each this electrode is exposed to a groove floor of this groove, a second end of each this electrode is embedded in this body again, and wherein this second end and this conductive channel electrically connect.

2. the light-emitting diode base structure with buried capacitor according to claim 1 is characterized in that wherein said body is piled up by a plurality of ceramic layers to form.

3. the light-emitting diode base structure with buried capacitor according to claim 1, the material that it is characterized in that wherein said body are an aluminium oxide, a quartz, a silicon dioxide, a calcium zirconate or a glass ceramics.

4. the light-emitting diode base structure with buried capacitor according to claim 1, the material that it is characterized in that wherein said dielectric layer are a silicon dioxide, a barium titanate or a ceramic layer.

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