JP2010271556A - Light source device - Google Patents

Light source device Download PDF

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JP2010271556A
JP2010271556A JP2009123782A JP2009123782A JP2010271556A JP 2010271556 A JP2010271556 A JP 2010271556A JP 2009123782 A JP2009123782 A JP 2009123782A JP 2009123782 A JP2009123782 A JP 2009123782A JP 2010271556 A JP2010271556 A JP 2010271556A
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light source
led
light
power consumption
air cooling
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Shigenori Shibue
重教 渋江
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light source device which is inexpensive and space-saving, and, preferably, has a highly durable cooling function. <P>SOLUTION: The light source device 100 includes a first light source unit (including red LED 1) emitting first color (red) light, a second light source unit (including green LED 8) emitting second color (green) light, a third light source unit (including blue LED 15) emitting third color (blue) light, and a synthesizing means synthesizing light from the first to third light source units on one optical axis. The two light source units (red LED 1 and blue LED 15) other than the light source unit whose power consumption is the highest out of the first to third light source units are disposed side by side in the one optical axis direction, and the light source unit (green LED 8) whose power consumption is the highest is disposed at a position different from a position where other two light source units are disposed side by side. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、映像表示装置に用いられるＬＥＤやレーザなどの光源装置に関する。   The present invention relates to a light source device such as an LED or a laser used in an image display device.

映像表示装置に用いられるＬＥＤやレーザなどの光源装置は、使用時の最適な温度範囲を維持するために、光源を冷却する冷却装置を備えている。   A light source device such as an LED or a laser used in an image display device includes a cooling device that cools the light source in order to maintain an optimum temperature range during use.

例えば特許文献１では、ＬＥＤを光源とした光源装置において、赤（Ｒ）、緑（Ｇ），青（Ｂ）の３色のＬＥＤの冷却手段として、ペルチェ素子あるいは水冷方式の冷却装置を使用している。   For example, in Patent Document 1, a Peltier element or a water-cooling type cooling device is used as a cooling means for LEDs of three colors of red (R), green (G), and blue (B) in a light source device using LEDs as a light source. ing.

特開２００７−１３３３００号公報JP 2007-133300 A

ところが、冷却装置の構成が複雑になるあまりにコストが高くなり、スペースを占有して映像表示装置の小型化の弊害となっていた。又、冷却部の寿命が短いことも問題であった。   However, the configuration of the cooling device is complicated, and the cost is too high, which occupies space and is a negative effect of downsizing the video display device. Another problem is the short life of the cooling section.

そこで、本発明は上述の問題点に鑑み、構成を簡潔にすることにより、低コストで省スペースであり、望ましくは耐久性の高い冷却機能を備えた光源装置の提供を目的とする。   In view of the above-described problems, the present invention has an object to provide a light source device having a cooling function that is low in cost and space-saving and preferably has a high durability by simplifying the configuration.

本発明の光源装置は、第１色の光を発光する第１光源部と、第２色の光を発光する第２光源部と、第３色の光を発光する第３光源部と、第１〜第３光源部の光を一の光軸上に合成する合成手段と、を備える。第１〜第３光源部のうち消費電力の最も高い光源部以外の２つの光源部は、当該一の光軸方向に並んで配設され、消費電力の最も高い光源部は、他の２つの光源部の並びとは異なる位置に配設される。   The light source device of the present invention includes a first light source unit that emits light of a first color, a second light source unit that emits light of a second color, a third light source unit that emits light of a third color, Combining means for combining the light of the first to third light source units on one optical axis. Two light source parts other than the light source part with the highest power consumption among the first to third light source parts are arranged side by side in the one optical axis direction, and the light source parts with the highest power consumption are the other two light source parts. It is arranged at a position different from the arrangement of the light source units.

本発明の光源装置において、第１〜第３光源部のうち消費電力の最も高い光源部以外の２つの光源部は、当該一の光軸方向に並んで配設され、消費電力の最も高い光源部は、他の２つの光源部の並びとは異なる位置に配設される。これにより、最も消費電力の高い光源部に設ける放熱器の面積を大きく確保することができ、低コスト、省スペース、耐久性の高い冷却機能を備えた光源装置が実現できる。   In the light source device of the present invention, two light source units other than the light source unit with the highest power consumption among the first to third light source units are arranged side by side in the one optical axis direction, and the light source with the highest power consumption. The unit is disposed at a position different from the arrangement of the other two light source units. Thereby, a large area of the radiator provided in the light source unit with the highest power consumption can be secured, and a light source device having a cooling function with low cost, space saving, and high durability can be realized.

実施の形態１に係る映像表示装置の構成図である。1 is a configuration diagram of a video display device according to Embodiment 1. FIG. 実施の形態１に係る光源の動作を説明する図である。FIG. 6 is a diagram for explaining the operation of the light source according to the first embodiment. 実施の形態１の変形例に係る映像表示装置の構成図である。6 is a configuration diagram of a video display device according to a modification of the first embodiment. FIG. 実施の形態２に係る映像表示装置の構成図である。6 is a configuration diagram of a video display apparatus according to Embodiment 2. FIG.

（実施の形態１）
＜構成＞
図１は、実施の形態１に係る光源装置１００を備えた映像表示装置の構成図である。図１において、映像表示装置は、光源装置１００として、光源の一例である赤色ＬＥＤ１、緑色ＬＥＤ８、青色ＬＥＤ１５と、光源光を平行光にするコリメータレンズ２，９，１６と、光源光を合成するダイクロイックミラー３，１０，１７と、を備えている。 (Embodiment 1)
<Configuration>
FIG. 1 is a configuration diagram of a video display device including a light source device 100 according to the first embodiment. In FIG. 1, the video display device combines the light source light with the red LED 1, the green LED 8, and the blue LED 15, which are examples of the light source, and collimator lenses 2, 9, and 16 that collimate the light source light. Dichroic mirrors 3, 10, and 17.

光源装置１００は図１の左方向に光を出射するが、各ＬＥＤは、光源装置の出射側から赤色ＬＥＤ１、緑色ＬＥＤ８、青色ＬＥＤ１５の順に設けられる。赤色ＬＥＤ１と緑色ＬＥＤ８は、光源装置の出射方向に並んで配置されるが、緑色ＬＥＤ８だけは他の２つのＬＥＤ１，１５と対向する位置に配置される。   The light source device 100 emits light in the left direction in FIG. 1, but each LED is provided in the order of the red LED 1, the green LED 8, and the blue LED 15 from the emission side of the light source device. The red LED 1 and the green LED 8 are arranged side by side in the emission direction of the light source device, but only the green LED 8 is arranged at a position facing the other two LEDs 1 and 15.

コリメータレンズ１６は青色ＬＥＤ１５の光を平行光にする。ダイクロイックミラー１７はコリメータレンズ１６の次段に設けられており、青色波長成分のみを反射し、その他の波長成分を透過する特性を持つ。そのため、コリメータレンズ１６を通過した青色ＬＥＤ１５の光を光源装置の出射側へと反射する。なお、ダイクロイックミラー１７は単なるミラーでも良い。   The collimator lens 16 makes the light of the blue LED 15 parallel light. The dichroic mirror 17 is provided at the next stage of the collimator lens 16 and has a characteristic of reflecting only the blue wavelength component and transmitting other wavelength components. Therefore, the light of the blue LED 15 that has passed through the collimator lens 16 is reflected to the emission side of the light source device. The dichroic mirror 17 may be a simple mirror.

コリメータレンズ９は緑色ＬＥＤ８の光を平行光にする。ダイクロイックミラー１０はコリメータレンズ９の次段に設けられており、緑色波長成分のみを反射し、その他の波長成分を透過する特性を持つ。そのため、コリメータレンズ９を通過した緑色ＬＥＤ８の緑色光を光源装置の出射側へと反射する。一方、ダイクロイックミラー１７の反射光である青色光はそのまま透過させることによって、緑色ＬＥＤ８の光と青色ＬＥＤ１５の光を合成する。   The collimator lens 9 makes the light of the green LED 8 parallel light. The dichroic mirror 10 is provided at the next stage of the collimator lens 9 and has a characteristic of reflecting only the green wavelength component and transmitting other wavelength components. Therefore, the green light of the green LED 8 that has passed through the collimator lens 9 is reflected to the emission side of the light source device. On the other hand, the blue light which is the reflected light of the dichroic mirror 17 is transmitted as it is, so that the light of the green LED 8 and the light of the blue LED 15 are combined.

コリメータレンズ２は赤色ＬＥＤ１の光を平行光にする。ダイクロイックミラー３はコリメータレンズ２の次段に設けられており、赤色波長成分のみを反射し、その他の波長成分を透過する特性を持つ。そのため、コリメータレンズ２を通過した赤色ＬＥＤ１の光を光源装置の出射側へと反射する。ダイクロイックミラー１０からの光はそのまま透過させることにより、赤色ＬＥＤ１、緑色ＬＥＤ８、青色ＬＥＤ１５の光を一の光軸上に合成する。このように、ダイクロイックミラー３，１０，１７は、赤色光、緑色光、青色光を合成する合成手段として機能する。   The collimator lens 2 turns the light of the red LED 1 into parallel light. The dichroic mirror 3 is provided at the next stage of the collimator lens 2 and has a characteristic of reflecting only the red wavelength component and transmitting other wavelength components. Therefore, the light of the red LED 1 that has passed through the collimator lens 2 is reflected to the emission side of the light source device. By transmitting the light from the dichroic mirror 10 as it is, the lights of the red LED 1, the green LED 8, and the blue LED 15 are combined on one optical axis. As described above, the dichroic mirrors 3, 10, and 17 function as a combining unit that combines red light, green light, and blue light.

さらに、映像表示装置は、光源装置１００の出射光に基づき映像を表示する手段として、集光レンズ２２と、ライトトンネル２３と、リレーレンズ２４と、ＤＭＤ２５と、投射レンズ２６と、を備える。集光レンズ２２は、ダイクロイックミラー３で合成された光を集光する。ライトトンネル２３は、集光レンズ２２で集光された光を受けて、その内部で反射を繰り返すことによって積分し輝度分布を均一にする。リレーレンズ２４はライトトンネル２３の出力光をＤＭＤ２５に伝達する。   Further, the video display device includes a condenser lens 22, a light tunnel 23, a relay lens 24, a DMD 25, and a projection lens 26 as means for displaying a video based on the light emitted from the light source device 100. The condensing lens 22 condenses the light synthesized by the dichroic mirror 3. The light tunnel 23 receives light collected by the condenser lens 22 and integrates it by repeating reflection inside thereof to make the luminance distribution uniform. The relay lens 24 transmits the output light from the light tunnel 23 to the DMD 25.

ＤＭＤ２５は、入力画像（図示せず）に応じてマイクロミラーの傾きを変化させる素子であり、リレーレンズ２４の出力光を強度変調して投射レンズ２６に出力する。ＤＭＤ２５はオン状態の時に投射レンズ２６に光を反射するが、オフ状態の時には投射レンズ２６外に光を反射する。ＤＭＤ２５には入力画像がＲＧＢ単位の時分割で入力され、ＲＧＢ単位でマイクロミラーをオン／オフする。投射レンズ２６は、ＤＭＤ２５で強度変調された光を受けて、スクリーン（図示せず）上に映像を投射する。   The DMD 25 is an element that changes the inclination of the micromirror according to an input image (not shown), and modulates the intensity of the output light of the relay lens 24 and outputs it to the projection lens 26. The DMD 25 reflects light to the projection lens 26 when in the on state, but reflects light out of the projection lens 26 when in the off state. An input image is input to the DMD 25 in time divisions in RGB units, and the micromirrors are turned on / off in RGB units. The projection lens 26 receives light whose intensity has been modulated by the DMD 25 and projects an image on a screen (not shown).

又、映像表示装置は、赤色ＬＥＤ１を冷却する手段として、放熱器４、空冷ファン５、サーミスタ６、温度制御回路７を備えている。放熱器４は赤色ＬＥＤ１の背面に取り付けられており、赤色ＬＥＤ１を放熱することにより冷却する。空冷ファン５は、赤色ＬＥＤ１に冷却空気を送って空冷する。サーミスタ６は赤色ＬＥＤ１の温度を検出する。温度制御回路７はサーミスタ６の出力電圧を監視し、赤色ＬＥＤ１の接合部の温度が規定の温度を上回らないよう空冷ファン５の回転速度を制御する。   The video display device also includes a radiator 4, an air cooling fan 5, a thermistor 6, and a temperature control circuit 7 as means for cooling the red LED 1. The radiator 4 is attached to the back surface of the red LED 1 and cools by radiating the red LED 1. The air cooling fan 5 sends cooling air to the red LED 1 to cool it. The thermistor 6 detects the temperature of the red LED 1. The temperature control circuit 7 monitors the output voltage of the thermistor 6 and controls the rotational speed of the air cooling fan 5 so that the temperature of the junction of the red LED 1 does not exceed a specified temperature.

さらに、映像表示装置は、緑色ＬＥＤ８を冷却する手段として、放熱器１１、空冷ファン１２、サーミスタ１３、温度制御回路１４を備え、青色ＬＥＤ１５を冷却する手段として、放熱器１８、空冷ファン１９、サーミスタ２０、温度制御回路２１を備える。これらの構成の詳細は赤色ＬＥＤ１を冷却する手段と同様であるため、説明を省略する。   Further, the video display device includes a radiator 11, an air cooling fan 12, a thermistor 13, and a temperature control circuit 14 as means for cooling the green LED 8, and a radiator 18, an air cooling fan 19, and a thermistor as means for cooling the blue LED 15. 20 and a temperature control circuit 21 are provided. Since the details of these configurations are the same as the means for cooling the red LED 1, description thereof will be omitted.

すなわち、実施の形態１の光源装置１００は、各ＬＥＤ１，８，１５を冷却する手段として、光源（ＬＥＤ１，８，１５）の温度を測定する温度センサ(サーミスタ６，１３，２０）と、ＬＥＤ１，８，１５を放熱する放熱手段(放熱器４，１１，１８）と、ＬＥＤ１，８，１５を空冷する空冷ファン５，１２，１９と、を備え、空冷ファン５，１２，１９はサーミスタ６，１３，２０の値に応じて制御されることを特徴とする。これにより、各ＬＥＤの温度が規定の値を超えないように空冷ファンによって制御することが可能である。   That is, the light source device 100 according to the first embodiment includes a temperature sensor (thermistors 6, 13, and 20) that measures the temperature of the light source (LEDs 1, 8, and 15) and the LED 1 as means for cooling the LEDs 1, 8, and 15. , 8 and 15, and the air cooling fans 5, 12 and 19 for cooling the LEDs 1, 8 and 15 by air. , 13 and 20 are controlled according to the values. Thereby, it is possible to control by the air cooling fan so that the temperature of each LED does not exceed a prescribed value.

＜ＬＥＤの消費電力＞
本実施の形態の光源装置１００は、光源の例としてＬＥＤを用いている。赤色ＬＥＤ１は、フォワード電圧２．６Ｖ、電流ピーク値３０Ａであり、緑色ＬＥＤ８はフォワード電圧５．１Ｖ、電流ピーク値３０Ａ、青色ＬＥＤ１５はフォワード電圧４．６Ａ、電流ピーク値３０Ａである。 <LED power consumption>
The light source device 100 of the present embodiment uses an LED as an example of the light source. The red LED 1 has a forward voltage of 2.6V and a current peak value of 30A, the green LED 8 has a forward voltage of 5.1V and a current peak value of 30A, and the blue LED 15 has a forward voltage of 4.6A and a current peak value of 30A.

１チップＤＭＤ２５をライトバルブとして使用する場合、Ｒ、Ｇ、Ｂを順次切り替えるフィールドシーケンシャル方式が用いられる。点灯デューティ比は図２に示すように、それぞれＲが２５％、Ｇが５０％、Ｂが２５％程度で使用される。よって、赤色ＬＥＤ１の消費電力ＷR、緑色ＬＥＤの消費電力ＷG、青色ＬＥＤ１５の消費電力ＷBは、それぞれＷR＝２．６×３０×０．２５＝１９．５Ｗ、ＷG＝５．１×３０×０．５＝７６．５Ｗ、ＷB＝４．６×３０×０．２５＝３４．５Ｗ、と算出される。 When the 1-chip DMD 25 is used as a light valve, a field sequential system that sequentially switches R, G, and B is used. As shown in FIG. 2, the lighting duty ratio is about 25% for R, 50% for G, and about 25% for B. Therefore, the power consumption W R of the red LED 1, the power consumption W G of the green LED, and the power consumption W B of the blue LED 15 are W R = 2.6 × 30 × 0.25 = 19.5 W and W G = 5. It is calculated that 1 × 30 × 0.5 = 76.5 W and W B = 4.6 × 30 × 0.25 = 34.5 W.

赤色ＬＥＤ１の接合部の温度ＴRは８０℃、緑色ＬＥＤ８の接合部の温度ＴGは１３０℃、青色ＬＥＤ１５の接合部の温度ＴBは１２０℃である。各ＬＥＤの接合部からのパッケージの熱抵抗を０．６（Ｋ／Ｗ）、周囲温度を４０℃とすると、各ＬＥＤの背面に取り付けられた放熱器（ヒートシンク）に要求される熱抵抗は、赤色ＬＥＤ１に取り付けられる放熱器４の熱抵抗ＲRがＲR＝（８０−４０）／１９．５−０．６＝１．４５（Ｋ／Ｗ）となる。又、緑色ＬＥＤ８の放熱器１１に要求される熱抵抗ＲGは、ＲG＝（１３０−４０）／７６．５−０．６＝０．５７６（Ｋ／Ｗ）、青色ＬＥＤ１５の放熱器１８に要求される熱抵抗ＲBは、ＲB＝（１２０−４０）／３４．５−０．６＝１．７１（Ｋ／Ｗ）となる。 The temperature T R of the junction of the red LED 1 is 80 ° C., the temperature T G of the junction of the green LED 8 is 130 ° C., and the temperature T B of the junction of the blue LED 15 is 120 ° C. If the thermal resistance of the package from the junction of each LED is 0.6 (K / W) and the ambient temperature is 40 ° C., the thermal resistance required for the radiator (heat sink) attached to the back of each LED is: thermal resistance R R of the radiator 4 to be attached to the red LED1 is R R = (80-40) /19.5-0.6=1.45 ( K / W). Further, the thermal resistance R G required for the radiator 11 of the green LED 8 is R G = (130−40) /76.5−0.6=0.576 (K / W), and the radiator 18 of the blue LED 15. The thermal resistance R B required for R B is R B = (120−40) /34.5−0.6=1.71 (K / W).

よって、光源装置が使用するＬＥＤの中では、緑色ＬＥＤ８の消費電力が最も大きく、必要な熱抵抗は最も低い。そのため、緑色ＬＥＤ８の放熱器１１が最も大きな面積を必要とする。   Therefore, among the LEDs used by the light source device, the green LED 8 has the largest power consumption and the lowest necessary thermal resistance. Therefore, the heat radiator 11 of the green LED 8 requires the largest area.

そのため、実施の形態１の光源装置では、上述したように赤色ＬＥＤ１とこれを冷却する冷却手段、及び青色ＬＥＤ１５とこれを冷却する冷却手段を、光源装置１００の出射光軸の方向に並べて配置し、緑色ＬＥＤ８とこれを冷却する冷却手段は他の２つのＬＥＤ１，１５に対向して配置する。しかし、対向配置に限らず、緑色ＬＥＤ８は他の２つのＬＥＤ１，１５と異なる軸上に配置されていれば良い。これにより、緑色ＬＥＤ８を放熱する放熱器１１の面積を大きくすることが出来る。このように、消費電力が異なる各色の光源を消費電力に応じて最適に配置することにより、限られたスペース中で放熱器の面積を最大化することが出来る。よって、高価な冷却装置を使用する必要がなく、低コストで省スペースな光源装置の冷却構造となる。また、本実施の形態の光源装置の冷却構造の中で寿命部品は冷却ファンのみであるため、長期信頼性が確保される。   Therefore, in the light source device of the first embodiment, as described above, the red LED 1 and the cooling means for cooling the red LED 1 and the blue LED 15 and the cooling means for cooling the red LED 1 are arranged side by side in the direction of the emission optical axis of the light source device 100. The green LED 8 and the cooling means for cooling the green LED 8 are arranged opposite to the other two LEDs 1 and 15. However, the green LED 8 is not limited to the opposing arrangement, but may be arranged on a different axis from the other two LEDs 1 and 15. Thereby, the area of the heat radiator 11 which dissipates the green LED 8 can be increased. Thus, the area of the radiator can be maximized in a limited space by optimally arranging the light sources of different colors according to the power consumption. Therefore, it is not necessary to use an expensive cooling device, and the cooling structure of the light source device is low-cost and space-saving. In addition, in the cooling structure of the light source device according to the present embodiment, the only life component is the cooling fan, so long-term reliability is ensured.

すなわち、実施の形態１の光源装置１００は、第１色(赤色）の光を発光する第１光源部(赤色ＬＥＤ１を含む）と、第２色(緑色）の光を発光する第２光源部(緑色ＬＥＤ８を含む）と、第３色(青色）の光を発光する第３光源部(青色ＬＥＤ１５を含む）と、第１〜第３光源部(各ＬＥＤ１，８，１５）の光を一の光軸上に合成する合成手段(ダイクロイックミラー３，１０，１７）と、を備え、各ＬＥＤ１，８，１５のうち消費電力の最も高い光源部(緑色ＬＥＤ８）以外の２つの光源部(赤色ＬＥＤ１、青色ＬＥＤ１５）は、前記一の光軸方向に並んで配設され、消費電力の最も高い光源部(緑色ＬＥＤ８）は、他の２つの光源部の並びとは異なる位置に配設されることを特徴とする。これにより、消費電力の高い緑色ＬＥＤ８の放熱手段のための面積を大きく確保することが出来る。   That is, the light source device 100 of Embodiment 1 includes a first light source unit (including red LED 1) that emits light of a first color (red) and a second light source unit that emits light of a second color (green). (Including the green LED 8), the third light source part (including the blue LED 15) that emits light of the third color (blue), and the first to third light source parts (each of the LEDs 1, 8, and 15). Combining means (dichroic mirrors 3, 10, 17) on the optical axis of the two light source parts (red LED) other than the light source part (green LED 8) having the highest power consumption among the LEDs 1, 8, 15. LED1, blue LED15) are arranged side by side in the one optical axis direction, and the light source unit (green LED8) having the highest power consumption is arranged at a position different from the arrangement of the other two light source units. It is characterized by that. Thereby, the area for the thermal radiation means of green LED8 with high power consumption can be ensured large.

又、一般的にヒートパイプなどを使用すれば、ＬＥＤの発熱部から別の場所に熱を輸送することも可能であるが、ヒートパイプの受熱部および熱輸送時の熱抵抗上昇、ヒートパイプ折り曲げ角度の制限などが加わり、スペースを有効に使えない場合が多い。これに対し本実施の形態では、ＬＥＤ１，８，１５に対し直接放熱器４，１３，２０をそれぞれ取り付けているため、限られたスペースを有効に利用することができる。また、放熱器４，１３，２０を大きくした場合、発熱部の面積が小さいと熱抵抗が下がらないことが想定されるが、受熱部にヒートパイプ埋め込みなどを行えば高効率な冷却が可能である。   In general, if a heat pipe or the like is used, heat can be transported from the heat generating part of the LED to another location. However, the heat receiving part of the heat pipe and the heat resistance during heat transport are increased, and the heat pipe is bent. In many cases, space is not used effectively due to angle restrictions. In contrast, in the present embodiment, the radiators 4, 13, and 20 are directly attached to the LEDs 1, 8, and 15, respectively, so that a limited space can be used effectively. In addition, when the radiators 4, 13, and 20 are made large, it is assumed that the heat resistance does not decrease if the area of the heat generating part is small, but highly efficient cooling is possible if a heat pipe is embedded in the heat receiving part. is there.

空冷ファン５，１９，１２は、全て冷却空気の向きが同じ方向になるように動作する。赤色ＬＥＤ１と青色ＬＥＤ１５は同軸上に配置されるため、一方のＬＥＤを冷却した後の空気が他方のＬＥＤに混入することにより、他方のＬＥＤの温度制御に影響を及ぼすことが考えられる。そこで、消費電力が小さい方の赤色ＬＥＤ１を、青色ＬＥＤ１５より冷却空気の流れの上流に配置することにより、この影響を緩和することができる。   All of the air cooling fans 5, 19, and 12 operate so that the directions of the cooling air are the same. Since the red LED 1 and the blue LED 15 are arranged on the same axis, it is conceivable that the air after cooling one LED is mixed into the other LED, thereby affecting the temperature control of the other LED. Therefore, this influence can be mitigated by arranging the red LED 1 having the smaller power consumption upstream of the blue LED 15 in the flow of the cooling air.

すなわち、消費電力の最も高い光源部(緑色ＬＥＤ８）以外の２つの光源部(赤色ＬＥＤ１、青色ＬＥＤ１５）にそれぞれ備えられた空冷ファン５，１９は、送風の向きが同一になるように設けられ、赤色ＬＥＤ１、青色ＬＥＤ１５のうち消費電力の小さい光源部（赤色ＬＥＤ１）は、大きい光源部(青色ＬＥＤ１５）よりも、空冷ファン５，１９の風路における上流に配設されることを特徴とする。これにより、一方のＬＥＤを冷却した後の空気が他方のＬＥＤに混入することにより他方のＬＥＤの温度制御に与える影響を緩和することができる。   That is, the air cooling fans 5 and 19 respectively provided in the two light source units (red LED 1 and blue LED 15) other than the light source unit (green LED 8) with the highest power consumption are provided so that the direction of the air blowing is the same, Of the red LED 1 and the blue LED 15, the light source unit (red LED 1) with low power consumption is disposed upstream of the large light source unit (blue LED 15) in the air path of the air cooling fans 5 and 19. Thereby, the influence which the air after cooling one LED mixes in the other LED, and exerts on the temperature control of the other LED can be reduced.

さらに、第１〜第３光源部(赤色光源１、緑色光源８、青色光源１５）に設けられた各空冷ファン５，１２，１９は、送風の向きが同一方向であることを特徴とする。これにより、装置内部で冷却空気の回り込みが生じず、各ＬＥＤの発熱を効率よく外部に排気することが出来る。   Further, the air cooling fans 5, 12, and 19 provided in the first to third light source units (the red light source 1, the green light source 8, and the blue light source 15) are characterized in that the blowing directions are the same direction. Thereby, the cooling air does not circulate inside the apparatus, and the heat generated by each LED can be efficiently exhausted to the outside.

なお、本実施の形態では、各ＬＥＤ１，８，１５の接合部温度を検出する手段としてサーミスタ６，１３，２０を用いたが、温度検出手段はこれに限らず、例えばＰＮ接合半導体を用いた検出器であっても良い。   In this embodiment, the thermistors 6, 13, and 20 are used as means for detecting the junction temperatures of the LEDs 1, 8, and 15. However, the temperature detection means is not limited to this, and, for example, a PN junction semiconductor is used. It may be a detector.

＜変形例＞
なお、上記説明では赤色ＬＥＤ１に空冷ファン５、青色ＬＥＤ１５に空冷ファン１９を
設けることとしたが、両ＬＥＤは同軸配置されるため、空冷ファンを共有することも可能である。そこで、例えば空冷ファンと温度制御回路は図３に示すように、赤色ＬＥＤ１にのみ設けても良い。すなわち、温度制御回路７は赤色ＬＥＤ１の接合部温度をサーミスタ６によって、青色ＬＥＤ１５の接合部温度をサーミスタ２０によって、それぞれ監視し、両ＬＥＤが規定の温度を超えないように空冷ファン５の回転速度を制御する。 <Modification>
In the above description, the red LED 1 is provided with the air cooling fan 5 and the blue LED 15 is provided with the air cooling fan 19. However, since both LEDs are coaxially arranged, it is also possible to share the air cooling fan. Therefore, for example, an air cooling fan and a temperature control circuit may be provided only for the red LED 1 as shown in FIG. That is, the temperature control circuit 7 monitors the junction temperature of the red LED 1 with the thermistor 6 and the junction temperature of the blue LED 15 with the thermistor 20, and the rotational speed of the air cooling fan 5 so that both LEDs do not exceed the specified temperature. To control.

すなわち、空冷ファン５，１９が２つの光源(赤色ＬＥＤ１、青色ＬＥＤ１５）の夫々に備えられることに代えて、赤色ＬＥＤ１、青色ＬＥＤ１５が一の空冷ファン５を共有することを特徴とする。これにより、光源装置のコストを抑制することが出来る。   That is, instead of providing the air cooling fans 5 and 19 in two light sources (red LED 1 and blue LED 15), the red LED 1 and blue LED 15 share one air cooling fan 5. Thereby, the cost of the light source device can be suppressed.

＜効果＞
実施の形態１の光源装置１００によれば、既に述べたように以下の効果を奏する。すなわち、光源装置１００は、第１色(赤色）の光を発光する第１光源部(赤色ＬＥＤ１を含む）と、第２色(緑色）の光を発光する第２光源部(緑色ＬＥＤ８を含む）と、第３色(青色）の光を発光する第３光源部(青色ＬＥＤ１５を含む）と、第１〜第３光源部(各ＬＥＤ１，８，１５）の光を一の光軸上に合成する合成手段(ダイクロイックミラー３，１０，１７）と、を備え、各ＬＥＤ１，８，１５のうち消費電力の最も高い光源部(緑色ＬＥＤ８）以外の２つの光源部(赤色ＬＥＤ１、青色ＬＥＤ１５）は、前記一の光軸方向に並んで配設され、消費電力の最も高い光源部(緑色ＬＥＤ８）は、他の２つの光源部の並びとは異なる位置に配設されることを特徴とする。これにより、消費電力の高い緑色ＬＥＤ８の放熱手段のための面積を大きく確保することが出来る。 <Effect>
According to the light source device 100 of the first embodiment, the following effects can be obtained as described above. That is, the light source device 100 includes a first light source unit (including a red LED 1) that emits light of a first color (red) and a second light source unit (including a green LED 8) that emits light of a second color (green). ), The third light source unit (including the blue LED 15) that emits light of the third color (blue), and the light of the first to third light source units (each LED 1, 8, 15) on one optical axis. Combining means (dichroic mirrors 3, 10, 17), and two light source parts (red LED 1, blue LED 15) other than the light source part (green LED 8) having the highest power consumption among the LEDs 1, 8, 15. Are arranged side by side in the one optical axis direction, and the light source unit (green LED 8) having the highest power consumption is arranged at a position different from the arrangement of the other two light source units. . Thereby, the area for the thermal radiation means of green LED8 with high power consumption can be ensured large.

又、光源装置１００は、第１〜第３光源部において各ＬＥＤ１，８，１５を冷却する手段として、光源（ＬＥＤ１，８，１５）の温度を測定する温度センサ(サーミスタ６，１３，２０）と、ＬＥＤ１，８，１５を放熱する放熱手段(放熱器４，１１，１８）と、ＬＥＤ１，８，１５を空冷する空冷ファン５，１２，１９と、を備え、空冷ファン５，１２，１９はサーミスタ６，１３，２０の値に応じて制御されることを特徴とする。これにより、各ＬＥＤの温度が規定の値を超えないように空冷ファンによって制御することが可能である。   Further, the light source device 100 is a means for cooling the LEDs 1, 8, and 15 in the first to third light source units, and a temperature sensor (thermistors 6, 13, and 20) that measures the temperature of the light source (LEDs 1, 8, and 15). And heat radiation means (heat radiators 4, 11, 18) for radiating the LEDs 1, 8, 15 and air cooling fans 5, 12, 19 for air cooling the LEDs 1, 8, 15 and the air cooling fans 5, 12, 19 Is controlled according to the values of the thermistors 6, 13, and 20. Thereby, it is possible to control by the air cooling fan so that the temperature of each LED does not exceed a prescribed value.

さらに、消費電力の最も高い光源部(緑色ＬＥＤ８）以外の２つの光源部(赤色ＬＥＤ１、青色ＬＥＤ１５）にそれぞれ備えられた空冷ファン５，１９は、送風の向きが同一になるように設けられ、赤色ＬＥＤ１、青色ＬＥＤ１５のうち消費電力の小さい光源部（赤色ＬＥＤ１）は、大きい光源部(青色ＬＥＤ１５）よりも、空冷ファン５，１９の風路における上流に配設されることを特徴とする。これにより、一方のＬＥＤを冷却した後の空気が他方のＬＥＤに混入することにより他方のＬＥＤの温度制御に与える影響を緩和することができる。   Furthermore, the air-cooling fans 5 and 19 respectively provided in the two light source parts (red LED 1 and blue LED 15) other than the light source part (green LED 8) with the highest power consumption are provided so that the direction of air blowing is the same, Of the red LED 1 and the blue LED 15, the light source unit (red LED 1) with low power consumption is disposed upstream of the large light source unit (blue LED 15) in the air path of the air cooling fans 5 and 19. Thereby, the influence which the air after cooling one LED mixes in the other LED, and exerts on the temperature control of the other LED can be reduced.

又、第１〜第３光源部(赤色光源１、緑色光源８、青色光源１５）に設けられた各空冷ファン５，１２，１９は、送風の向きが同一方向であることを特徴とする。これにより、装置内部で冷却空気の回り込みが生じず、各ＬＥＤの発熱を効率よく外部に排気することが出来る。   Further, the air cooling fans 5, 12, and 19 provided in the first to third light source units (red light source 1, green light source 8, and blue light source 15) are characterized in that the direction of air blowing is the same direction. Thereby, the cooling air does not circulate inside the apparatus, and the heat generated by each LED can be efficiently exhausted to the outside.

さらに、空冷ファン５，１９が２つの光源(赤色ＬＥＤ１、青色ＬＥＤ１５）の夫々に備えられることに代えて、赤色ＬＥＤ１、青色ＬＥＤ１５が一の空冷ファン５を共有することを特徴とする。これにより、光源装置のコストを抑制することが出来る。   Furthermore, instead of the air cooling fans 5 and 19 being provided in each of the two light sources (red LED 1 and blue LED 15), the red LED 1 and blue LED 15 share one air cooling fan 5. Thereby, the cost of the light source device can be suppressed.

（実施の形態２）
＜構成＞
図４は、実施の形態２の映像表示装置の構成を示す図である。図１に示した実施の形態１と同一の構成要素には同一の番号を付している。実施の形態１では、光源装置の出射側から順に赤色ＬＥＤ１、緑色ＬＥＤ８、青色ＬＥＤ１５と配置した。しかし、図４に示す実施の形態２の構成では、光源装置１００の出射側から順に赤色ＬＥＤ１、青色ＬＥＤ１５、緑色ＬＥＤ８と配置する。配置は、各ＬＥＤの配光特性によって最適化する。それ以外は実施の形態１と同様である。なお、上記構成において、ダイクロイックミラー１０は通常のミラーでも良い。 (Embodiment 2)
<Configuration>
FIG. 4 is a diagram illustrating a configuration of the video display apparatus according to the second embodiment. The same components as those in the first embodiment shown in FIG. In the first embodiment, the red LED 1, the green LED 8, and the blue LED 15 are arranged in order from the emission side of the light source device. However, in the configuration of the second embodiment shown in FIG. 4, the red LED 1, the blue LED 15, and the green LED 8 are arranged in order from the emission side of the light source device 100. The arrangement is optimized according to the light distribution characteristics of each LED. The rest is the same as in the first embodiment. In the above configuration, the dichroic mirror 10 may be a normal mirror.

このような配置によっても、緑色ＬＥＤ８を他の２つのＬＥＤと対向して配置しているため、最も消費電力が高く放熱を必要とする緑色ＬＥＤ８に取り付ける放熱器１１の面積を大きくとることができ、実施の形態１と同様の効果を奏する。なお、緑色ＬＥＤ８は他の２つのＬＥＤと対向配置する必要はなく、他の２つのＬＥＤとは異なる軸上に配置されていれば良い。   Even with such an arrangement, since the green LED 8 is arranged opposite to the other two LEDs, the area of the radiator 11 attached to the green LED 8 that has the highest power consumption and requires heat dissipation can be increased. The same effects as in the first embodiment are obtained. Note that the green LED 8 does not need to be disposed opposite to the other two LEDs, and may be disposed on a different axis from the other two LEDs.

本発明は、ＤＭＤやＬＣＤを使用したプロジェクタの光源装置、特に高信頼性が要求される光源装置に適用可能である。   The present invention can be applied to a light source device for a projector using a DMD or LCD, particularly a light source device that requires high reliability.

１ 赤色ＬＥＤ、３，１０，１７ ダイクロイックメータ、４，１１，１８ 放熱器、５，１２，１９ 空冷ファン、６，１３，２０ サーミスタ、７，１４，２１ 温度制御回路、８ 緑色ＬＥＤ、１５ 青色ＬＥＤ。   1 Red LED, 3, 10, 17 Dichroic meter, 4, 11, 18 Radiator, 5, 12, 19 Air cooling fan, 6, 13, 20 Thermistor, 7, 14, 21 Temperature control circuit, 8 Green LED, 15 Blue LED.

Claims (5)

第１色の光を発光する第１光源部と、
第２色の光を発光する第２光源部と、
第３色の光を発光する第３光源部と、
前記第１〜第３光源部の光を一の光軸上に合成する合成手段と、を備えた光源装置であって、
前記第１〜第３光源部のうち消費電力の最も高い光源部以外の２つの光源部は、前記一の光軸方向に並んで配設され、
前記消費電力の最も高い光源部は、前記２つの光源部の並びとは異なる位置に配設されることを特徴とする、光源装置。 A first light source that emits light of a first color;
A second light source that emits light of a second color;
A third light source that emits light of a third color;
A light source device comprising: combining means for combining light from the first to third light source units on one optical axis;
Two light source parts other than the light source part with the highest power consumption among the first to third light source parts are arranged side by side in the one optical axis direction,
The light source unit having the highest power consumption is disposed at a position different from the arrangement of the two light source units. 前記第１〜第３光源部の夫々は、
光源と、
前記光源の温度を測定する温度センサと、
前記光源を放熱する放熱手段と、
前記光源を空冷する空冷ファンと、を備え、
前記空冷ファンは前記温度センサの値に応じて制御されることを特徴とする、請求項１に記載の光源装置。 Each of the first to third light source units is
A light source;
A temperature sensor for measuring the temperature of the light source;
Heat radiating means for radiating the light source;
An air cooling fan for air cooling the light source,
The light source device according to claim 1, wherein the air cooling fan is controlled according to a value of the temperature sensor. 前記消費電力の最も高い光源部以外の２つの光源部にそれぞれ備えられた前記空冷ファンは、送風の向きが同一になるように設けられ、
前記２つの光源部のうち消費電力の小さい光源部は、大きい光源部よりも、前記空冷ファンの風路における上流に配設されることを特徴とする、請求項２に記載の光源装置。 The air-cooling fans respectively provided in the two light source units other than the light source unit with the highest power consumption are provided so that the direction of air blowing is the same,
3. The light source device according to claim 2, wherein the light source unit with low power consumption among the two light source units is disposed upstream of the large light source unit in the air path of the air cooling fan. 前記第１〜第３光源部に設けられた前記各空冷ファンは、送風の向きが同一方向であることを特徴とする請求項２又は３に記載の光源装置。   4. The light source device according to claim 2, wherein the air cooling fans provided in the first to third light source units have the same direction of air blowing. 5. 前記空冷ファンが前記２つの光源の夫々に備えられることに代えて、前記２つの光源同士が一の前記空冷ファンを共有することを特徴とする、請求項２に記載の光源装置。   The light source device according to claim 2, wherein the two light sources share one air cooling fan instead of the air cooling fan being provided in each of the two light sources.
JP2009123782A 2009-05-22 2009-05-22 Light source device Pending JP2010271556A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015114369A (en) * 2013-12-09 2015-06-22 カシオ計算機株式会社 Projection device
CN111147836A (en) * 2015-05-06 2020-05-12 杜比实验室特许公司 Thermal compensation in image projection
US11385535B2 (en) 2019-12-23 2022-07-12 Panasonic Intellectual Property Management Co., Ltd. Light source device and projection display apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015114369A (en) * 2013-12-09 2015-06-22 カシオ計算機株式会社 Projection device
CN111147836A (en) * 2015-05-06 2020-05-12 杜比实验室特许公司 Thermal compensation in image projection
US11323669B2 (en) 2015-05-06 2022-05-03 Dolby Laboratories Licensing Corporation Thermal compensation in image projection
CN111147836B (en) * 2015-05-06 2022-08-05 杜比实验室特许公司 Thermal compensation in image projection
US11889233B2 (en) 2015-05-06 2024-01-30 Dolby Laboratories Licensing Corporation Thermal compensation in image projection
US11385535B2 (en) 2019-12-23 2022-07-12 Panasonic Intellectual Property Management Co., Ltd. Light source device and projection display apparatus
US11550213B2 (en) 2019-12-23 2023-01-10 Panasonic Intellectual Property Management Co., Ltd. Light source device and projection display apparatus

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