CN203205419U

CN203205419U - Unidirectional HV LED chip

Info

Publication number: CN203205419U
Application number: CN 201320153108
Authority: CN
Inventors: 张荣民; 田景明
Original assignee: TIANJIN JINMA PHOTOELECTRIC CO Ltd
Current assignee: TIANJIN JINMA PHOTOELECTRIC CO Ltd
Priority date: 2012-09-13
Filing date: 2013-03-29
Publication date: 2013-09-18
Anticipated expiration: 2023-03-29
Also published as: CN103219331A

Abstract

The utility model discloses a unidirectional HV (high voltage) LED chip, comprising a substrate, a plurality of LED microcrystals intensively formed on the substrate and successively in series connection and a packaging and characterized by also comprising two expansion terminals respectively in series connection with two intermediate LED microcrystals in an LED microcrystal series connection circuit and two LED microcrystal intermediate open circuits respectively in communication with the expansion terminals. Through the two expansion terminals, inner LED microcrystals of a single HV LED can realize series-parallel interchange and a plurality of expanded functions can be realized by parallelly or serially connecting with different electric appliance assemblies or function circuits so as to realize a plurality of convenient control for brightness, spectrum, color mixing, etc. of an HV LED. The unidirectional HV LED chip realizes diversified use, minimizes model exploitation and reduces cost.

Description

Unidirectional HV led chip

Technical field

The utility model relates to LED lamp lighting technical field, particularly relates to a kind of unidirectional HV led chip.

Background technology

Along with the continuous lifting of process technique and the efficient of light-emitting diode, in order to cooperate the growth requirement in market, towards larger merit and more high brightness develop namely that high-capacity LED has become trend.HV LED(high-voltage LED) household AC power can not only be seen through external full-wave rectifier and drive, also can directly use dc powered, the luminous efficiency of HV led chip is than generally the AC LED in the positive-negative half-cycle conversion is high.Also because the high-tension characteristic of HVLED, so that when same electrical power is inputted, for traditional DC led chip structure, can reduce the electric current that flows through every micromeritics of HV LED, also because of the design of the little electric current of HVLED, polycrystallite, therefore can improve the uniformity of CURRENT DISTRIBUTION.

Interconnected between HV LED crystallite is to utilize the wiring on the substrate to finish, and encapsulation procedure is simple, and packaging cost is relatively cheap, so the design of high pressure low current produces better luminous efficiency.Namely compare the low-voltage LED high-voltage LED two large obviously competitive advantages are arranged: the first, under same power output, the required drive current of HV LED is significantly less than low-voltage LED.The second, HV LED can significantly reduce the loss of AC-DC conversion efficiency.

But existing HV led chip only has the LED crystallite of a plurality of series connection, and each HV led chip only has two electrodes, and the expansion of HV led chip, functional and design is poor again.

The utility model content

The purpose of this utility model is for the technological deficiency that exists in the prior art, and a kind of unidirectional HV led chip with very strong expansion is provided.

For realizing that the technical scheme that the purpose of this utility model adopts is:

A kind of unidirectional HV led chip, comprise substrate, intensive a plurality of LED crystallites and the encapsulation that is formed on the substrate and connects successively, it is characterized in that: also comprise two extended terminals that are communicated with two LED crystallites in centre of LED crystallite series circuit respectively, open circuit between the LED crystallite that two are communicated with extended terminal respectively.

The A utmost point of described led chip, the K utmost point and two rectangular Boulezs of extended terminal.

A kind of unidirectional HV led chip, comprise substrate and the intensive a plurality of LED crystallites that are formed on the substrate, described a plurality of LED crystallite is divided into the many groups of LED crystallite strings that are composed in series successively, the setting that is in parallel of identical and each the LED crystallite string of the LED crystallite number that described LED crystallite string comprises, two the LED crystallites in the centre of at least one LED crystallite string are communicated with extended terminal respectively, open circuit between the LED crystallite that two are communicated with extended terminal respectively.

Compared with prior art, the beneficial effects of the utility model are:

By increasing by two extended terminals, can realize the connection in series-parallel exchange of the inner LED crystallite of single HV LED, also can realize multiple expanding function by in parallel or connect different electric appliance components or functional circuit, realize the multiple convenient controls such as brightness, spectrum and colour mixture of HV LED.Realize the diversification use of a HV led chip, reduce the model exploitation, reduce cost.As add resistance, CCR constant current, or temperature sensing, come the automatic adjustment circuit electric current by temperature, also can contact different LED and other device, two extended terminals also can be split up into two different circuits and use simultaneously, by the designer by the demand combination in any.As increase external sensor and can change the brightness of control spectral color according to external environment and change, can also carry out by extended terminal the adjusting of micro-current, move so as to the main ripple that produces spectrum, so as to producing the mixing of different colours light.

Description of drawings

Figure 1 shows that the unidirectional HV led chip circuit theory schematic diagram of the utility model the first embodiment;

Figure 2 shows that the unidirectional HV led chip structural representation of the utility model the first embodiment.

Figure 3 shows that the second embodiment principle schematic of the present utility model.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.

As illustrated in fig. 1 and 2, the unidirectional HV led chip of the utility model the first embodiment, comprise substrate 2, the intensive a plurality of LED crystallites 1 that are formed on the substrate and connect successively and encapsulation, also comprise two the first extended terminal 3 and the second extended terminals 4 that are communicated with two LED crystallites in centre of LED crystallite series circuit respectively, open circuit between the LED crystallite that two are communicated with extended terminal respectively, described the first extended terminal borrows the group encapsulation further to be fixedly connected with chip with the second extended terminal.Wherein, the material of extended terminal is used the AU material, is produced by the evaporation operation on MOCVD equipment.

The preparation of HV-LED is to adopt semiconductor MOCVD(burning ion evaporation) operation, with a large amount of LED crystallites by functional requirement on the highdensity substrate that is arranged in certain area (sapphire or silicon substrate), and the LED crystallite adopts a plurality of series connection settings, AC power is that high voltage direct current directly supplies LED luminous through the rectifier bridge rectification like this, this and prior art are similar, no longer describe at this.

Connection between middle two the LED crystallites of the LED crystallite string that HV led chip of the present utility model will be connected successively disconnects and is welded to connect extended terminal 3 and extended terminal 4 at two the LED crystallites in two centres respectively, increase by two extended terminals, increased the type of service of HV led chip.On outward appearance embodied, described led chip comprised four terminals that expose, i.e. the A utmost point of rectangular Boulez, the K utmost point and the first extended terminal 3 and the second extended terminal 4.

HV led chip such as a script 12V, after having increased by two extended terminals, the HV led chip that namely can be used as 12V after under the service condition of 12V two extended terminals being communicated with uses, under the service condition of 6V, the A utmost point and the second extended terminal 4 are communicated with, the K utmost point is communicated with the first extended terminal 3, namely be equivalent to the LED crystallite of originally series connection is changed into the LED crystallite string of two parallel connections, the quantity of LED crystallite occupies half of whole crystallite quantity on each LED crystallite string, so namely applicable to the 6V condition.

Certainly, its type of service also is not limited to above-mentioned use, also can realize multiple expanding function by in parallel or connect different electric appliance components or functional circuit, as add resistance, the CCR constant current, or temperature sensing, come the automatic adjustment circuit electric current by temperature, also can contact different LED and other device, two extended terminals also can be split up into two different circuits uses simultaneously, by the demand combination in any, realize the multiple convenient controls such as brightness, spectrum and colour mixture of HV LED by the designer.As increase external sensor and can change the brightness of control spectral color according to external environment and change, can also carry out by extended terminal the adjusting of micro-current, move so as to the main ripple that produces spectrum, produce the mixing of different colours light.

The second embodiment

As shown in Figure 3, a kind of unidirectional HV led chip, comprise substrate 12 and the intensive a plurality of LED crystallites 11 that are formed on the substrate 12, described a plurality of LED crystallite is divided into the many groups of LED crystallite strings that are composed in series successively, the setting that is in parallel of identical and each the LED crystallite string of the LED crystallite number that described LED crystallite string comprises, two the LED crystallites in the centre of at least one LED crystallite string are communicated with the first extended terminal 13 second extended terminals 14 respectively, and two are opened circuit respectively with between the LED crystallite that the first extended terminal and the second extended terminal are communicated with.The LED crystallite that is about on the substrate is divided into many group LED crystallite strings, each LED crystallite string contains the LED crystallite of equal number and successively series connection, then with each group LED crystallite connection in series-parallel, realize the expansion effect similar to the first embodiment by two extended terminals that are arranged on the LED crystallite string at last, specifically, can make the quantity of LED crystallite string select one or several or all on the LED crystallite string extended terminal is set, fully realize the diversification of control.

The above only is preferred implementation of the present utility model; should be noted that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.

Claims

1. unidirectional HV led chip, comprise substrate, intensive a plurality of LED crystallites and the encapsulation that is formed on the substrate and connects successively, it is characterized in that: also comprise two extended terminals that are communicated with two LED crystallites in centre of LED crystallite series circuit respectively, open circuit between the LED crystallite that two are communicated with extended terminal respectively.

2. unidirectional HV led chip as claimed in claim 1 is characterized in that: the A utmost point of described led chip, the K utmost point and two rectangular Boulezs of extended terminal.

3. unidirectional HV led chip, comprise substrate and the intensive a plurality of LED crystallites that are formed on the substrate, it is characterized in that: described a plurality of LED crystallites are divided into the many groups of LED crystallite strings that are composed in series successively, the setting that is in parallel of identical and each the LED crystallite string of the LED crystallite number that described LED crystallite string comprises, wherein, two the LED crystallites in the centre of at least one LED crystallite string are communicated with extended terminal respectively, open circuit between the LED crystallite that two are communicated with extended terminal respectively.