JPS6333876A - Measuring method of luminance for led array - Google Patents
Measuring method of luminance for led arrayInfo
- Publication number
- JPS6333876A JPS6333876A JP61176960A JP17696086A JPS6333876A JP S6333876 A JPS6333876 A JP S6333876A JP 61176960 A JP61176960 A JP 61176960A JP 17696086 A JP17696086 A JP 17696086A JP S6333876 A JPS6333876 A JP S6333876A
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- Prior art keywords
- image sensor
- led
- led array
- light
- array
- Prior art date
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- 238000000034 method Methods 0.000 title description 9
- 238000000691 measurement method Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 abstract description 13
- 238000003491 array Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、LEDアレイの各LED素子の輝度を測定す
るLEDアレイ輝度測定方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an LED array brightness measurement method for measuring the brightness of each LED element of an LED array.
従来の技術
第5図は従来のLEDアレイ輝度測定方法の一例が適用
されるLEDアレイ輝度測定装置を示す斜視図である。BACKGROUND OF THE INVENTION FIG. 5 is a perspective view showing an LED array brightness measuring device to which an example of a conventional LED array brightness measuring method is applied.
このLEDアレイ輝度測定装置では、まず、LEDアレ
イ1の最先端のLED素子の発光がホトセンチ2の受光
面に当たる位置までステッピングモータ3を回し歯車4
、送りねじ5を介してホトセンナ2を矢印り方向に移動
させ、る。・そして、前記最先端のLED素子のみを発
光させ、この光をセルホックレンズアレイ6を通してホ
トセンサ2で受光し、その輝度を測定する。次に、上述
したように測定したLED素子に隣接するLED素子の
みを発光させ、上記と同様にしてホトセンサ2でその輝
度を測定する。以下、同様にLEDアレイ1全体にわた
って順次LED素子の輝度を測定する。なお、このよう
な輝度測定過程において、発光させるLED素子が移動
していくうち、その発光がホトセンf2の受光面に当た
らなくなり測定ができなくなるのを防ぐため、適当な間
隔でホトセンサ2を移動させる。In this LED array brightness measuring device, first, the stepping motor 3 is rotated until the light emitted from the most advanced LED element of the LED array 1 hits the light receiving surface of the photocentimeter 2, and the gear 4 is rotated.
, the photosenner 2 is moved in the direction of the arrow via the feed screw 5. -Then, only the most advanced LED element is caused to emit light, and this light is received by the photosensor 2 through the CellHoc lens array 6, and its brightness is measured. Next, only the LED elements adjacent to the LED elements measured as described above are caused to emit light, and the brightness thereof is measured using the photosensor 2 in the same manner as described above. Thereafter, similarly, the brightness of the LED elements is sequentially measured over the entire LED array 1. In addition, in such a brightness measurement process, as the LED element that emits light moves, the photo sensor 2 is moved at appropriate intervals in order to prevent the emitted light from hitting the light receiving surface of the photo sensor f2, making it impossible to measure. .
発明が解決しようとする問題点
しかし、この様な測定方法では、LEDアレイ1上の全
てのLED素子の輝度を測定するのに非常に時間がかか
り、その結果、LEDアレイ1の量産に大きな障害にな
っていた。Problems to be Solved by the Invention However, with such a measurement method, it takes a very long time to measure the brightness of all the LED elements on the LED array 1, and as a result, it poses a major obstacle to the mass production of the LED array 1. It had become.
上述の問題点は以下の理由で生ずる。即ち、第1に、ホ
トセンサが1つしかないので輝度測定が同時に1つのL
ED素子に対してしか行なえない。The above-mentioned problem arises for the following reasons. That is, firstly, since there is only one photo sensor, brightness measurement can be performed simultaneously using one L.
This can only be done for ED elements.
第2に、各LED素子の輝度測定を順次行なっているう
ち、LED発生光がホトセンサの受光部にあたらなくな
ってくるので、その度に測定するLED素子とホトセン
サの位置関係を補正する必要があり、位置関係が安定す
るまで次の輝度測定に移れない。Second, as the brightness of each LED element is measured one after another, the light generated by the LED no longer hits the light receiving part of the photosensor, so it is necessary to correct the positional relationship between the LED element being measured and the photosensor each time. , you cannot move on to the next brightness measurement until the positional relationship is stabilized.
この対策として、LEDアレイの各LED素子と1対1
(二対窓する受光素子アレイ、即ち1次元のイメージセ
ンサを使用する事が考えられる。ところで、LEDアレ
イとイメージセンナでは同じ素子密度使用であっても、
製造誤差、温度膨張などが異なるため、各LED素子と
受光素子を1対1(=向い合せる事は困難であり、この
対策案は上記問題点に対して適切な解決策になっていな
かった。As a countermeasure for this, one-on-one connection with each LED element of the LED array is possible.
(It is conceivable to use a light-receiving element array with two pairs of windows, that is, a one-dimensional image sensor.By the way, even if the LED array and image sensor use the same element density,
Due to differences in manufacturing errors, temperature expansion, etc., it is difficult to match each LED element and light receiving element one-on-one (=facing each other), and this countermeasure was not an appropriate solution to the above problem.
本発明は、上記問題点を解決するためになされたもので
、LED素子の輝度を短時間で測定でき、この結果、L
EDアレイの量産化を図ることができるLEDアレイ輝
度測定方法を提供することを目的とする。The present invention was made in order to solve the above problems, and it is possible to measure the brightness of an LED element in a short time, and as a result, L
It is an object of the present invention to provide an LED array brightness measurement method that allows mass production of ED arrays.
問題点を解決するための手段
本発明は、上記目的を達成するため、LEDアレイの所
定のLED素子を発光させながら、LEDアレイ・イメ
ージセンサ相対位置変更手段で前記LEDアレイ及びイ
メージセンサの相対位置を変化させ、前記所定のLED
素子に対応するイメージセンサの受光素子が最も効率良
く光を受けるようにLEDアレイの位置をあらかじめ概
略位置決めし、この位置決め状態でLEDアレイを点灯
しながら、LEDアレイ及びイメージセンナの位置関係
をLEDアレイ・イメージセンサ相対位置変更手段で1
回以上調整・設定して、各設定状態で前記イメージセン
サの各素子毎に受光量を測定し、測定された1個以上の
受光量のうち最大値の受光量に基づいて当該LED素子
の輝度を算出することを特徴とする。Means for Solving the Problems In order to achieve the above object, the present invention changes the relative position of the LED array and image sensor using an LED array/image sensor relative position changing means while causing a predetermined LED element of the LED array to emit light. and the predetermined LED
The position of the LED array is roughly determined in advance so that the light-receiving element of the image sensor corresponding to the element receives light most efficiently, and while the LED array is turned on in this positioned state, the positional relationship between the LED array and the image sensor is adjusted.・1 with image sensor relative position changing means
The amount of light received by each element of the image sensor is measured in each setting state, and the brightness of the LED element is determined based on the maximum amount of light received among the one or more measured light amounts. It is characterized by calculating.
作 用
まず、所定のLED素子に対応するイメージセンサの受
光素子が最も効率良く光を受けるようにあらかじめ概略
位置決めする。この位置決め状態でLEDアレイを点灯
し、かつ、LEDアレイ及びイメージセンサの位置を1
回以上にわたって調整、設定し、この設定状態でイメー
ジセンサの各素子毎に得られる受光量を測定し、1回以
上の測定で得られた受光量のうち最大の受光量に基づい
てLED素子の輝度を算出する。Operation First, the light receiving element of the image sensor corresponding to a predetermined LED element is roughly positioned in advance so that it receives light most efficiently. In this positioning state, turn on the LED array, and set the position of the LED array and image sensor to 1.
The amount of light received by each element of the image sensor is measured in this setting state, and the amount of light received by the LED element is determined based on the maximum amount of light received among the amounts of light received in one or more measurements. Calculate the brightness.
実施例
第1図は本発明の一実施例のLEDアレイ輝度測定方法
が適用されるLEDアレイ輝度測定装置を示す斜視図で
ある。Embodiment FIG. 1 is a perspective view showing an LED array brightness measuring device to which an LED array brightness measuring method according to an embodiment of the present invention is applied.
このLEDアレイ輝度測定装置(以下、輝度測定装置と
いう)は、複数個のLED素子を列状に配設したLED
アレイ11と、LEDアレイ11の発する光をセルホッ
クレンズアレイ(以下、SLAという)12を介して受
光するイメージセンサ13とを有しており、5LAI2
およびイメージセンサ13は装置本体部(不図示)に保
持されている一方、LEDアレイ11はLEDアレイ・
イメージセンサ相対位置変更手段としてのLEDアレイ
移動手段50によって主走査方向く矢印Aで示す)、副
走査方向(矢印Bで示す)、及び回転方向(矢印Cで示
す)に移動されるようになっている。This LED array brightness measuring device (hereinafter referred to as the brightness measuring device) is an LED array brightness measuring device in which a plurality of LED elements are arranged in a row.
It has an array 11 and an image sensor 13 that receives light emitted from the LED array 11 via a self-lock lens array (hereinafter referred to as SLA) 12, and has a 5LAI2 array.
and the image sensor 13 are held in the device main body (not shown), while the LED array 11 is
The LED array moving means 50 serving as image sensor relative position changing means moves the image sensor in the main scanning direction (indicated by arrow A), the sub-scanning direction (indicated by arrow B), and the rotational direction (indicated by arrow C). ing.
LEDアレイ移動手段50は、略台座上の第1ベース部
51、第2ベース部52、第3ベース部53を備え、こ
れらを相互に移動自在(13段に積み重ねており、第1
ベース部51上にはLEDアレイ 11を載置している
。The LED array moving means 50 includes a first base part 51, a second base part 52, and a third base part 53 substantially on a pedestal, and these are mutually movable (stacked in 13 stages,
The LED array 11 is placed on the base portion 51.
装置本体部にはステッピングモータ54が設けられてお
り、このスラッピングモータ54にはタイミングベルト
55を介して歯車56が連接されている。この歯車56
には送りねじ57が設けられ、この送りねじ57は第3
ベース部53にはめ込まれている。送りねじ57がステ
ッピングモータ540回転に伴って回転することによっ
て第3ベース部53は第2ベース部52、第1ベース部
51及びLEDアレイ11を載置した状態で副走査(矢
印B)方向に移動する。A stepping motor 54 is provided in the main body of the apparatus, and a gear 56 is connected to the slapping motor 54 via a timing belt 55. This gear 56
is provided with a feed screw 57, and this feed screw 57
It is fitted into the base portion 53. As the feed screw 57 rotates as the stepping motor 540 rotates, the third base portion 53 moves in the sub-scanning direction (arrow B) with the second base portion 52, first base portion 51, and LED array 11 mounted thereon. Moving.
第3ベース部53上の側端部にはステッピングモータ5
8と、このステッピングモータ58(=連動する歯車5
9とが載置されている。一方、第2ベース部52の側部
面には歯車59にかみ合う歯が並んで設けられている。A stepping motor 5 is mounted on the side end portion of the third base portion 53.
8 and this stepping motor 58 (=interlocking gear 5
9 is placed. On the other hand, teeth that mesh with the gear 59 are arranged in a row on the side surface of the second base portion 52 .
また、第2ベース部52の底部には長手方向(矢印A方
向)にみぞが形成されている一方、第3ベース部53に
はこのみそに嵌合する突起が形成されている。ステッピ
ングモータ58が回転すると、歯車59を介して第2ベ
ース部52は主走査(矢印B)方向に移動する。Furthermore, a groove is formed in the bottom of the second base part 52 in the longitudinal direction (in the direction of arrow A), while a protrusion that fits into the groove is formed in the third base part 53. When the stepping motor 58 rotates, the second base portion 52 moves in the main scanning direction (arrow B) via the gear 59.
第2ベース部52上の側端部にはステッピングモータ6
0と、このステッピングモータ60に連動する歯車61
とが載置されている。一方、第1ベース部51の側端部
には歯車61にかみ合うように略孤状に歯が設けられて
おり、また、この反対側の第1ベース部51は回転軸6
2によって第2ベース部52に軸支されている。ステッ
ピングモータ60が回転すると歯車61を介して第1ベ
ース部51はLEDアレイ11を載置した状態で回転軸
62を中心にして矢印C方向に回転する。A stepping motor 6 is mounted on the side end portion of the second base portion 52.
0 and a gear 61 interlocked with this stepping motor 60.
is listed. On the other hand, the side end of the first base part 51 is provided with substantially arc-shaped teeth so as to mesh with the gear 61, and the first base part 51 on the opposite side is provided with a rotating shaft 61.
2 is pivotally supported by the second base portion 52. When the stepping motor 60 rotates, the first base portion 51 rotates in the direction of arrow C about the rotation shaft 62 with the LED array 11 mounted thereon via the gear 61.
さらに装置本体部は、ステッピングモータ(以下、モー
タという) 54. 58. 60の回転、LEDアレ
イ11の任意のLED素子の点灯、イメージセンサ13
の受光データの記憶・演算、イメージセンサ13の受光
素子毎の感度ばらつきの補正等を行なうコントローラ(
不図示)を備えている。Furthermore, the main body of the apparatus includes a stepping motor (hereinafter referred to as a motor) 54. 58. 60 rotation, lighting of any LED element of the LED array 11, image sensor 13
A controller (which stores and calculates the received light data of the
(not shown).
以上のように構成された輝度測定装置におけるLEDア
ンイ輝度測定方法を説明する。A method for measuring LED contrast brightness using the brightness measuring device configured as described above will be explained.
まず、第1段階として、LEDアレイ11とイメージセ
ンサ13の位置関係を決めるために次の作業を行なう。First, as a first step, the following work is performed to determine the positional relationship between the LED array 11 and the image sensor 13.
■ LEDアレイ11の全素子を点灯させたまま、モー
タ54を動かす事(二より(以下の説明において、モー
タ54. 58. 60を動かす項目については省略す
る)第3ベース部53を矢印B方向に移動させ、イメー
ジセンサ13の両端付近の受光出力が最大になる位置を
記憶する。■ Move the motor 54 while keeping all the elements of the LED array 11 lit (Secondly (in the following explanation, items for moving the motors 54, 58, and 60 will be omitted)) Move the third base part 53 in the direction of arrow B. , and memorize the positions near both ends of the image sensor 13 where the received light output is maximum.
■ この記憶した位置情報をもとに、第1ベース部51
を矢印C方向に回転させ、LEDアレイエ1の発光ライ
ンと、イメージセンサ13の受光ラインが平行になるよ
うに設定する。■ Based on this stored position information, the first base portion 51
is rotated in the direction of arrow C so that the light emitting line of the LED array 1 and the light receiving line of the image sensor 13 are set to be parallel.
■ 上記■、■をくり返し、前記平行度が最良となる位
置を設定する。■ Repeat steps (1) and (2) above to set the position where the parallelism is the best.
■ LEDアンイ11の最先端のLED素子のみを点灯
し、対応するイメージセンサ13の受光素子の受光出力
が最大となる位置を第2ベース部52を矢印A方向に移
動させながら探し、その位置(位置αとする)を記憶す
る。■ Turn on only the most advanced LED element of the LED array 11, search for the position where the light receiving output of the corresponding image sensor 13's light receiving element is maximum while moving the second base part 52 in the direction of arrow A, and locate the position ( The position α) is stored.
■ 上記■で探した位置αから、LEDアレイ】1の最
後端のLED素子のみを点灯し、対応するイメージセン
サ13の受光出力が最大となる位置を第2ベース部52
を矢印A方向に移動させながら探し、その位置(位置β
とする)を記憶する。■ From the position α found in the above ■, turn on only the rearmost LED element of LED array] 1, and select the position where the light reception output of the corresponding image sensor 13 is maximum on the second base part 52.
Search for it while moving it in the direction of arrow A, and find its position (position β
) is memorized.
以上の作業により、輝度測定前の位置決めが完了する。With the above operations, positioning before luminance measurement is completed.
次に、第2段階として以下の作業手順でLEDアレイ1
1の輝度を測定する。但し、ここでイメージセンサ13
の各受光素子の感度ばらつきは、上記したコントローラ
に備えられた補正回路で補正される。Next, in the second step, the LED array 1 is installed using the following procedure.
Measure the brightness of 1. However, here the image sensor 13
The variation in sensitivity of each light-receiving element is corrected by a correction circuit provided in the above-described controller.
■ LEDアレイ 11およびイメージセンサ13のそ
れぞれの主走査方向の寸法誤差の関係から算出される分
解能を分解能γとし、第2ベース部52を位置αから位
置βまで分解能γ毎に移動し、移動毎にLEDアレイ1
1の必要なLED素子の発光を、イメージセンサ13で
測定する。■ The resolution calculated from the relationship between the dimensional errors in the main scanning direction of the LED array 11 and the image sensor 13 is the resolution γ, and the second base portion 52 is moved from position α to position β for each resolution γ, and LED array 1
The light emission of the required LED element 1 is measured by the image sensor 13.
■ LEDアレイ11およびイメージセンサ13のそれ
ぞれの副走査方向の寸法誤差の関係から算出される分解
能を分解能θとし、第3ベース部53を垂直方向寸法誤
差範囲で分解能θ毎に移動し、移動毎に上記■と同じく
測定する。■ The resolution calculated from the relationship between the dimensional errors in the sub-scanning direction of the LED array 11 and the image sensor 13 is defined as the resolution θ, and the third base portion 53 is moved by the resolution θ within the vertical dimensional error range, and Measure in the same way as above.
こうして測定した輝度データの中から、最良値を抽出し
、それを正規の輝度測定データとして採用し、各LED
素子の輝度に比例したデータとするものである。From the brightness data measured in this way, the best value is extracted and used as regular brightness measurement data, and each LED
The data is proportional to the luminance of the element.
このことを第2図、第3図に用いてさらに詳しく説明す
る。This will be explained in more detail using FIGS. 2 and 3.
第2図は、前記の測定方法を1つのLED素子に着目し
、これに対応するイメージセンサ13の受光状態を示す
模式図である。第2図(a)には、LED素子と前記L
ED素子に対応するイメージセンf 13上の受光素子
を示している。この図に示す実施例では主走査方向(X
方向)に5段階、副走査方向(X方向)に3段階の測定
を行ない、結局15回にわたって測定データを得ている
。第2図(a)で四角形(ロ)はイメージセンサ13の
受光素子を示し、口内の白部分(二LEDアレイ11の
LED素子(点線の円で示す)の発光が当っている事を
示している。第2(b)は、同図(a)での測定値を一
覧表にしたものであり、この場合測定値98がこのLE
D素子の輝度として採用される。FIG. 2 is a schematic diagram showing the light receiving state of the image sensor 13 corresponding to the above measurement method focusing on one LED element. FIG. 2(a) shows the LED element and the L
A light receiving element on the image sensor f13 corresponding to the ED element is shown. In the embodiment shown in this figure, the main scanning direction (X
The measurement was performed in 5 steps in the X direction (direction) and in 3 steps in the sub-scanning direction (X direction), resulting in measurement data being obtained 15 times. In FIG. 2(a), the rectangle (b) indicates the light-receiving element of the image sensor 13, and indicates that the white part of the mouth (which is illuminated by the LED elements (indicated by dotted circles) of the two-LED array 11). The second (b) is a list of the measured values in (a) of the same figure, and in this case, the measured value 98 corresponds to this LE.
This is used as the brightness of the D element.
第3図は、同じ素子密度のLEDアレイ11とイメージ
センサ13の素子密度の差をモデル化したものであり、
図中四角形(ロ)はイメージセンサ13の受光素子、円
(○)はLED素子、口中の白い部分はLED素子によ
る照射光を示している。同図(a−1)および(a−2
)はLEDアレイ11の素子密度がイメージセンサ13
の素子密度よりも若干高い例であり、同図(b−1)お
よび(b−2)はその逆である。また、同図(a−1)
および(b−1)は前記位置αでの例を示し、同図(a
−2)および(b−2)は、前記位置βでの例を示して
いる。FIG. 3 is a model of the difference in element density between the LED array 11 and the image sensor 13, both of which have the same element density.
In the figure, the rectangle (b) indicates the light receiving element of the image sensor 13, the circle (◯) indicates the LED element, and the white part in the mouth indicates the light irradiated by the LED element. Figures (a-1) and (a-2)
), the element density of the LED array 11 is the same as that of the image sensor 13.
This is an example in which the element density is slightly higher than that of , and (b-1) and (b-2) in the figure are the opposite. Also, the same figure (a-1)
and (b-1) show an example at the position α, and (a
-2) and (b-2) show examples at the position β.
なお、この場合、同図(b−1)および(b−2)をく
らべてわかるように、前記位置αから前記位置βまでL
EDアレイ11とイメージセンサ13との相対位置を移
動したとき、イメージセンf 13の任意の受光素子に
対応するLED素子以外のLBD素子の光がこの受光素
子に照射される可能性がある。このような場合(以下、
これを「場合l」という)、LEDアレイ11上で所定
間隔をあけてLED素子を1ライン毎に発光させて測定
を行なう必要がある。従って、この場合、前記■〜■に
ついては所定間隔毎にLED素子が発光されることによ
って輝度測定が行なわれる。In this case, as can be seen by comparing (b-1) and (b-2) in the same figure, the distance L from the position α to the position β is
When the relative positions of the ED array 11 and the image sensor 13 are moved, there is a possibility that light from an LBD element other than the LED element corresponding to an arbitrary light receiving element of the image sensor f13 may be irradiated onto this light receiving element. In such cases (below,
In this case (referred to as "case 1"), it is necessary to make the measurement by emitting light from the LED elements line by line at a predetermined interval on the LED array 11. Therefore, in this case, the luminance measurement for the above-mentioned items 1 to 2 is performed by emitting light from the LED elements at predetermined intervals.
以上の説明から明らかなように、本発明(二よるLED
アレイ輝度測定方法では、測定に使用するイメージセン
サの素子数および素子密度は、被測定物であるLEDア
レイと同じである場合に最も高速に輝度を測定できる。As is clear from the above description, the present invention (two LED
In the array brightness measurement method, brightness can be measured most quickly when the number of elements and element density of the image sensor used for measurement are the same as the LED array that is the object to be measured.
しかしながら、イメージセンサの受光素子密度、素子数
はそれに限定されるものではなく、前記「場合1」のよ
うな条件があるときにも測定時間は上記に比べ遅くなる
ものの、本発明の輝度測定方法は適用できる。However, the density and number of light-receiving elements of the image sensor are not limited thereto, and even when conditions such as "Case 1" exist, the measurement time is slower than the above, but the brightness measurement method of the present invention is applicable.
第4図は上述の実施例のLEDアレイ輝度測定方法が適
用される他のLEDアレイ輝度測定装置を示す斜視図で
ある。このLEDアレイ輝度測定装置は、第1図の5L
A12、イメージセンサ13の代わ(へ二、レンズ81
とIC型イメージセンサ82を用いて縮小光学系を構成
している。図において11は第1図に示したのと同様の
LEDアレイである。そして、レンズ81とIC型イメ
ージセンサ82以外は、第1図(二示す輝度測定装置と
同様に構成されている。FIG. 4 is a perspective view showing another LED array brightness measuring device to which the LED array brightness measuring method of the above-described embodiment is applied. This LED array brightness measuring device is 5L in Figure 1.
A12, in place of the image sensor 13 (2, lens 81
A reduction optical system is constructed using the IC type image sensor 82 and the IC type image sensor 82. In the figure, 11 is an LED array similar to that shown in FIG. The structure other than the lens 81 and the IC type image sensor 82 is the same as that of the luminance measuring device shown in FIG.
なお、上述した実施例では、5LA12が装置本体部に
保持される場合を説明したが、LEDアレイ11(二対
窓して設けておき、イメージセンサ13に対して移動自
在とするようにしてもよい。In the above-mentioned embodiment, the case where the 5LA 12 is held in the main body of the device has been explained, but the LED array 11 (two pairs of windows may be provided and made movable with respect to the image sensor 13). good.
また、上述実施例ではイメージセンサを固定し、LED
アレイを移動させる場合を説明したが、逆になるように
構成してもよい。In addition, in the above embodiment, the image sensor is fixed and the LED
Although the case where the array is moved has been described, the arrangement may be made in the opposite manner.
発明の効果
以上の説明から明らかなように、所定のLED素子を発
光してLEDアレイ及びイメージセンサをあらかじめ概
略位置決めし、この位置決め状態でさらにLEDアレイ
及びイメージセンサの位置を1回以上にわたって調整・
設定し、各設定状態で受光素子毎に受光量を測定し、測
定された1個以上の受光量のうち最大値の受光量に基づ
いて当該LED素子の輝度を算出するようにしているの
で、LED素子の発光切替回数、受光素子の移動回数及
び移動時間が大幅に減少し、LEDアレイの全素子に対
する輝度を高速に測定でき、この結果、LEDアレイの
生産効率、コストダウンに飛躍的な効果をもたらす。Effects of the Invention As is clear from the above description, the LED array and the image sensor are approximately positioned in advance by emitting light from a predetermined LED element, and in this positioning state, the positions of the LED array and the image sensor are further adjusted/adjusted one or more times.
setting, the amount of light received by each light receiving element is measured in each setting state, and the brightness of the LED element is calculated based on the maximum amount of light received among the one or more measured amounts of light received. The number of times the LED element's light emission is switched, the number of times the light-receiving element moves, and the time it takes to move are significantly reduced, and the brightness of all elements of the LED array can be measured at high speed.As a result, the production efficiency and cost reduction of the LED array are dramatically improved. bring about.
第1図は本発明の一実施例のLEDアレイ輝度測定方法
が適用されるLEDアレイ輝度測定装置を示す斜視図、
第2図は第1図の測定装置に本発明の一実施例を適用し
たときの任意のLED素子とイメージセンサの受光出力
を説明するための模式図、第3図は同実施例においてL
EDアレイのLED素子とイメージセンナの受光素子と
のずれの状態を示す模式図、第4図は本発明の一実施例
が適用される他の輝度測定装置を示す斜視図、第5図は
従来のLEDアレイ輝度測定方法の一例が適用される輝
度測定装置を示す斜視図である。
11・・・LEDアレイ、13・・・イメージセンサ、
50・・・LEDアレイ移動手段、51・・・第1ベー
ス部、52・・・第2ベース部、53・・・第3ベース
部、54、 58. 60・・・ステッピングモータ。
代理人の氏名 弁理士 中 尾 敏 男 はか1名第2
図
(a)
(b)
第3図
ロロローーーーーーロロ請
[[ローーーーーーロロロ
ロ00−−−−−− [[[
x pg DI−−−−−−[10口
第4図
第5図FIG. 1 is a perspective view showing an LED array brightness measuring device to which an LED array brightness measuring method according to an embodiment of the present invention is applied;
FIG. 2 is a schematic diagram for explaining the light reception output of an arbitrary LED element and an image sensor when one embodiment of the present invention is applied to the measuring device of FIG. 1, and FIG.
A schematic diagram showing the state of misalignment between the LED elements of the ED array and the light receiving elements of the image sensor, FIG. 4 is a perspective view showing another brightness measuring device to which an embodiment of the present invention is applied, and FIG. 5 is a conventional one. 1 is a perspective view showing a brightness measuring device to which an example of the LED array brightness measuring method of FIG. 11... LED array, 13... Image sensor,
50... LED array moving means, 51... First base part, 52... Second base part, 53... Third base part, 54, 58. 60...Stepping motor. Name of agent: Patent attorney Toshio Nakao (1st person, 2nd person)
Figure (a) (b) Figure 3 Rororo Rorororororororororororororororo00------- [[[x pg DI-----[10th mouth 4th Figure 5
Claims (1)
EDアレイ・イメージセンサ相対位置変更手段で前記L
EDアレイ及びイメージセンサの相対位置を変化させ、
前記所定のLED素子に対応するイメージセンサの受光
素子が最も効率良く光を受けるようにLEDアレイの位
置をあらかじめ概略位置決めし、この位置決め状態でL
EDアレイを点灯しながら、LEDアレイ及びイメージ
センサの位置関係をLEDアレイ・イメージセンサ相対
位置変更手段で1回以上調整・設定して、各設定状態で
前記イメージセンサの各素子毎に受光量を測定し、測定
された1個以上の受光量のうち最大値の受光量に基づい
て当該LED素子の輝度を算出することを特徴とするL
EDアレイ輝度測定方法。While making the predetermined LED elements of the LED array emit light,
The ED array/image sensor relative position changing means
changing the relative positions of the ED array and the image sensor;
The position of the LED array is approximately determined in advance so that the light receiving element of the image sensor corresponding to the predetermined LED element receives light most efficiently, and in this positioning state, the L
While lighting the ED array, adjust and set the positional relationship between the LED array and the image sensor one or more times using the LED array/image sensor relative position changing means, and adjust the amount of light received for each element of the image sensor in each setting state. L characterized in that the brightness of the LED element is calculated based on the maximum amount of light received among one or more measured amounts of light received.
ED array brightness measurement method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61176960A JPS6333876A (en) | 1986-07-28 | 1986-07-28 | Measuring method of luminance for led array |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61176960A JPS6333876A (en) | 1986-07-28 | 1986-07-28 | Measuring method of luminance for led array |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6333876A true JPS6333876A (en) | 1988-02-13 |
Family
ID=16022724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61176960A Pending JPS6333876A (en) | 1986-07-28 | 1986-07-28 | Measuring method of luminance for led array |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6333876A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009014699A (en) * | 2007-07-06 | 2009-01-22 | Icp Electronics Inc | Luminance detector |
-
1986
- 1986-07-28 JP JP61176960A patent/JPS6333876A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009014699A (en) * | 2007-07-06 | 2009-01-22 | Icp Electronics Inc | Luminance detector |
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