JP2020115440A

JP2020115440A - light source

Info

Publication number: JP2020115440A
Application number: JP2019006741A
Authority: JP
Inventors: 公起橋本; Koki Hashimoto
Original assignee: Takara Co Ltd
Current assignee: Takara Co Ltd
Priority date: 2019-01-18
Filing date: 2019-01-18
Publication date: 2020-07-30
Anticipated expiration: 2039-01-18
Also published as: JP6648317B1

Abstract

To provide a light source excellent in light distribution balance.SOLUTION: LEDs that emit three kinds of luminescent colors are arranged in a matrix form of n rows and m columns on a substrate, respectively. The LED that emits a first luminescent color is arranged in a [1+4(i-1)]th row of a [1+3(h-1)]th column, a [2i]th row of a [2+3(h-1)]th column, and a [3+4(i-1)]th row of a [3h]th column, the LED of one luminescent color of the remaining two kinds of luminescent colors is arranged in a [[3+4(i-1)]th row of a [1+3(h-1)]th column, a [1+4(i-1)]th row of a [2+3(h-1)]th column, and a [2i]th row of a [3h]th column, and the LED of the last luminescent color is arranged in a [2i]th row of a [1+3(h-1)]th column, a [3+4(i-1)]th row of a [2+3(h-1)]th column, and a [1+4(i-1)]th row of a [3h]th column.SELECTED DRAWING: Figure 1

Description

本発明は、照明用の光源に係り、より詳しくは、ＬＥＤの配列による配光バランスの優れた光源に関する。 The present invention relates to a light source for illumination, and more particularly to a light source having an excellent light distribution balance due to an array of LEDs.

ＬＥＤを搭載した基板が照明用に採用されるようになってきている。照明用の白色光を得るためには、一般的に赤色光を発光するＬＥＤ、緑色光を発光するＬＥＤ、青色光を発光するＬＥＤの３種類のＬＥＤをそれぞれ複数個使用し、それらを配列して使用する。 Substrates equipped with LEDs have been adopted for illumination. In order to obtain white light for illumination, generally, three types of LEDs, each of which emits red light, LED which emits green light, and LED which emits blue light, are used, and they are arranged. To use.

この時、上記３種のＬＥＤの配列は、例えば１ライン目を赤色光を発光するＬＥＤとし、２ライン目を緑色光を発光するＬＥＤとし、３ライン目を青色光を発光するＬＥＤとすることが行われている。
しかしながら、上記３種類のＬＥＤが配列された光源と、被写体との距離が短い（例えば３００ｍｍ）場合、配光バランスが良くなく、本来の白色になりにくい。 At this time, in the arrangement of the above-mentioned three types of LEDs, for example, the first line is an LED that emits red light, the second line is an LED that emits green light, and the third line is an LED that emits blue light. Is being done.
However, when the distance between the light source in which the three types of LEDs are arranged and the subject is short (for example, 300 mm), the light distribution is not good and the original white color is unlikely to be obtained.

また、被写体の状況によっては、赤色光、緑色光、青色光を全て点灯させず、赤色光、緑色光、青色光のうちの１色又は２色を使用した方が鮮明になることがあるが、従来のＬＥＤ配列では、上記１色又は２色の光のＬＥＤを点灯した場合、被写体の中心から外れて照らすことになっていた。 Depending on the condition of the subject, it may be clearer to use one or two colors of red light, green light, and blue light without turning on all the red light, green light, and blue light. In the conventional LED array, when the LEDs of the above-mentioned one-color or two-color lights are turned on, they are supposed to illuminate outside the center of the subject.

特表２００９−５３９２２９号公報Japanese Patent Publication No. 2009-538229

本願の目的は、３種類の発光色をそれぞれ発光する複数のＬＥＤの配列を適正化し、配光バランスが優れた光源を具現することにある。 An object of the present application is to realize a light source having an excellent light distribution balance by optimizing the arrangement of a plurality of LEDs that respectively emit three types of emission colors.

本発明による光源は、３種類の発光色を発光するＬＥＤが基板上にｎ行、ｍ列（ｎ、ｍは自然数）のマトリクス状に配置され、
前記３種類の発光色のうちの第１の発光色を発光するＬＥＤは、［１＋３（ｈ−１）］列目の［１＋４（ｉ−１）］行目、［２＋３（ｈ−１）］列目の［２ｉ］行目、［３ｈ］列目の［３＋４（ｉ−１）］行目に配置され、残りの２種類の発光色のうちの１つである第２の発光色を発光するＬＥＤは、［１＋３（ｈ−１）］列目の［［３＋４（ｉ−１）］行目、［２＋３（ｈ−１）］列目の［１＋４（ｉ−１）］行目、［３ｈ］列目の［２ｉ］行目に配置され、残りの１つの発光色である第３の発光色を発光するＬＥＤは、［１＋３（ｈ−１）］列目の［２ｉ］行目、［２＋３（ｈ−１）］列目の［３＋４（ｉ−１）］行目、［３ｈ］列目の［１＋４（ｉ−１）］行目に等間隔に配置され（ｈ、ｉは自然数）、それぞれのＬＥＤは前記基板上に形成されたパターンに接続され、前記第１の発光色を発光するＬＥＤ、前記第２の発光色を発光するＬＥＤ、前記第３の発光色を発光するＬＥＤは、それぞれの駆動回路に接続される、ことを特徴とする。 In the light source according to the present invention, LEDs emitting three kinds of emission colors are arranged on a substrate in a matrix of n rows and m columns (n and m are natural numbers),
The LED that emits the first emission color of the three types of emission colors is [2+3(h-1)] in the [1+4(i-1)] row in the [1+3(h-1)] column. The second emission color, which is one of the remaining two types of emission colors, is arranged in the [2i]th row of the column and the [3+4(i-1)]th row of the [3h]th column. The LEDs to be operated are the [[3+4(i-1)] row of the [1+3(h-1)] column, the [1+4(i-1)] row of the [2+3(h-1)] column, The LEDs arranged in the [2i] row of the 3h]th column and emitting the third emission color which is the remaining one emission color are the [2i]th row of the [1+3(h-1)]th column, They are arranged at equal intervals on the [3+4(i-1)] line of the [2+3(h-1)] column and on the [1+4(i-1)] line of the [3h] column (h and i are natural numbers. ), each LED is connected to a pattern formed on the substrate, and emits the first emission color LED, the second emission color LED, and the third emission color LED. Are connected to respective drive circuits.

前記ｎと前記ｍとの積は３の倍数であり、前記第１の発光色を発光するＬＥＤ、前記第２の発光色を発光するＬＥＤ、前記第３の発光色を発光するＬＥＤは同数である、ことを特徴とする。 The product of n and m is a multiple of 3, and the same number of LEDs that emit the first emission color, LEDs that emit the second emission color, and LEDs that emit the third emission color are the same. It is characterized by

前記３種類の発光色を発光させるＬＥＤのうち少なくとも１種類のＬＥＤを点灯させることにより所望の色の光が得られる、ことを特徴とする。 It is characterized in that light of a desired color is obtained by turning on at least one type of LED that emits the three types of emission colors.

前記３種類の発光色は、赤、緑、青であることを特徴とする。 The three types of emission colors are red, green, and blue.

本発明により、３種類の発光色をそれぞれ発光する複数のＬＥＤを使用した配光バランスの優れた光源が具現できる。 According to the present invention, it is possible to realize a light source having an excellent light distribution balance, which uses a plurality of LEDs each emitting three kinds of emission colors.

本発明の一実施例に係るＬＥＤの配列を示す平面図である。FIG. 5 is a plan view showing an array of LEDs according to an embodiment of the present invention. 本発明の一実施例によるＬＥＤチップの封止樹脂が無い場合の配光特性を示す図である。FIG. 5 is a diagram showing a light distribution characteristic in the case where the LED chip according to the embodiment of the present invention has no sealing resin. 本発明の一実施例によるＬＥＤチップの封止樹脂が有る場合の配光特性を示す図である。It is a figure which shows the light distribution characteristic when the sealing resin of the LED chip|tip by one Example of this invention exists.

図１は、本発明の一実施例に係るＬＥＤの配列を示す平面図である。
本実施例においては、赤色光を発光するＬＥＤ（「Ｒ」で示す）、緑色光を発光するＬＥＤ（「Ｇ」で示す）、青色光を発光するＬＥＤ（「Ｇ」で示す）が基板１０上にｎ行、ｍ列（ｎ、ｍは自然数）のマトリクス状に配置される。 FIG. 1 is a plan view showing an array of LEDs according to an embodiment of the present invention.
In this embodiment, the substrate 10 includes an LED that emits red light (indicated by “R”), an LED that emits green light (indicated by “G”), and an LED that emits blue light (indicated by “G”). They are arranged in a matrix of n rows and m columns (n and m are natural numbers).

図１において、ｎは１１であり、ｍは１２であるが、これに限定されるものではない。
また、３種類の発光色を赤、緑、青として例示したが、それ以外の組合せでもよい。 In FIG. 1, n is 11 and m is 12, but not limited to this.
Further, the three types of emission colors are exemplified as red, green, and blue, but other combinations may be used.

図１において、１行目１列目には赤色光を発光するＬＥＤが配置されているが、これは例であって、これに限定されない。
すなわち、３種類の発光色のうちの第１の発光色のＬＥＤ（例えば、赤色光を発光するＬＥＤ）は、［１＋３（ｈ−１）］列目の［１＋４（ｉ−１）］行目、［２＋３（ｈ−１）］列目の［２ｉ］行目、［３ｈ］列目の［３＋４（ｉ−１）］行目に配置され、残りの２種類の発光色のうちの１つの発光色のＬＥＤ（例えば、緑色光を発光するＬＥＤ）は、［１＋３（ｈ−１）］列目の［［３＋４（ｉ−１）］行目、［２＋３（ｈ−１）］列目の［１＋４（ｉ−１）］行目、［３ｈ］列目の［２ｉ］行目に配置され、残りの１つの発光色のＬＥＤ（例えば、青色光を発光するＬＥＤ）は、［１＋３（ｈ−１）］列目の［２ｉ］行目、［２＋３（ｈ−１）］列目の［３＋４（ｉ−１）］行目、［３ｈ］列目の［１＋４（ｉ−１）］行目に等間隔に配置される。（ｈ、ｉは自然数） In FIG. 1, LEDs that emit red light are arranged in the first row and the first column, but this is an example, and the present invention is not limited to this.
That is, the LED of the first emission color (for example, the LED that emits red light) of the three emission colors is the [1+4(i−1)] row of the [1+3(h−1)] column. , [2+3(h-1)]th column, [2i] row, and [3h]th column, [3+4(i-1)] row, and one of the remaining two types of emission colors is arranged. The LED of the emission color (for example, an LED that emits green light) is the [1+3(h-1)] column, the [[3+4(i-1)] row, the [2+3(h-1)] column. The remaining one emission color LED (for example, an LED that emits blue light) arranged in the [1+4(i-1)] line and the [3h]th column [2i] line is [1+3(h). -1)] column [2i] row, [2+3(h-1)] column [3+4(i-1)] row, [3h] column [1+4(i-1)] row The eyes are evenly spaced. (H and i are natural numbers)

これら３種類のＬＥＤは、基板１０上に形成されたパターン（図示せず）に接続され、赤色光を発光するＬＥＤ、緑色光を発光するＬＥＤ、青色光を発光するＬＥＤは、それぞれ赤色光を発光するＬＥＤの駆動回路（図示せず）、緑色光を発光するＬＥＤの駆動回路（図示せず）、青色光を発光するＬＥＤの駆動回路（図示せず）に接続される。 These three types of LEDs are connected to a pattern (not shown) formed on the substrate 10, and the LEDs that emit red light, the LEDs that emit green light, and the LEDs that emit blue light respectively emit red light. It is connected to an LED drive circuit (not shown) that emits light, an LED drive circuit (not shown) that emits green light, and an LED drive circuit (not shown) that emits blue light.

３種類のＬＥＤのうち少なくとも１種類のＬＥＤを点灯させることにより所望の色の光が得られる。 Light of a desired color is obtained by lighting at least one of the three types of LEDs.

３種類のＬＥＤは、同数であることが好ましく、したがって、ｎとｍとの積は３の倍数になる。 The three types of LEDs are preferably equal in number, so the product of n and m is a multiple of 3.

図１に示した光源を試作し、光源から３００ｍｍの位置での配光バランスを確認した。
図２は、本発明の一実施例によるＬＥＤチップの封止樹脂が無い場合の配光特性を示す図であり、図３は、本発明の一実施例によるＬＥＤチップの封止樹脂が有る場合の配光特性を示す図である。この封止樹脂が有る場合が本願のＬＥＤに相当する。
図２においては、赤色光、緑色光、青色光が略重なり、
図３においても、配光バランスが良好であることが確認できる。 The light source shown in FIG. 1 was prototyped and the light distribution balance was confirmed at a position 300 mm from the light source.
FIG. 2 is a diagram showing a light distribution characteristic when an LED chip sealing resin according to an embodiment of the present invention is not provided, and FIG. 3 is a case where an LED chip sealing resin according to an embodiment of the present invention is provided. It is a figure which shows the light distribution characteristic of. The case where this sealing resin is present corresponds to the LED of the present application.
In FIG. 2, red light, green light, and blue light substantially overlap,
Also in FIG. 3, it can be confirmed that the light distribution balance is good.

本発明によれば、赤色、緑色、青色をそれぞれ発光する複数のＬＥＤを使用した配光バランスの良好な光源が具現できる。 According to the present invention, it is possible to implement a light source having a good light distribution balance using a plurality of LEDs that emit red, green, and blue respectively.

１０基板 10 substrates

Claims

LEDs that emit three types of emission colors are arranged on a substrate in a matrix of n rows and m columns (n and m are natural numbers).
The LED that emits the first emission color of the three types of emission colors is [2+3(h-1)] in the [1+4(i-1)] row in the [1+3(h-1)] column. The second emission color, which is one of the remaining two emission colors, is arranged in the [2i]th row of the column and the [3+4(i-1)]th row of the [3h]th column. The LEDs to be operated are the [[3+4(i-1)] row of the [1+3(h-1)] column, the [1+4(i-1)] row of the [2+3(h-1)] column, The LEDs arranged in the [2i] row of the 3h]th column and emitting the third emission color which is the remaining one emission color are the [2i]th row of the [1+3(h-1)]th column, They are arranged at equal intervals on the [3+4(i-1)] line of the [2+3(h-1)] column and on the [1+4(i-1)] line of the [3h] column (h and i are natural numbers). ), each LED is connected to a pattern formed on the substrate and emits the first emission color LED, the second emission color LED, and the third emission color LED. Is a light source connected to each drive circuit.

The product of n and m is a multiple of 3, and the same number of LEDs that emit the first emission color, LEDs that emit the second emission color, and LEDs that emit the third emission color are the same. The light source according to claim 1, wherein:

The light source according to claim 1, wherein at least one of the LEDs that emits the three types of emission colors is turned on.

The light source according to claim 1, wherein the three types of emission colors are red, green, and blue.