JP2012182017A - Lighting device - Google Patents
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- JP2012182017A JP2012182017A JP2011044293A JP2011044293A JP2012182017A JP 2012182017 A JP2012182017 A JP 2012182017A JP 2011044293 A JP2011044293 A JP 2011044293A JP 2011044293 A JP2011044293 A JP 2011044293A JP 2012182017 A JP2012182017 A JP 2012182017A
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Abstract
Description
本発明は、液晶表示装置等のバックライトに用いる照明装置に関する。 The present invention relates to an illumination device used for a backlight such as a liquid crystal display device.
近年、利用者の注意を喚起するために表示部の一部分を高輝度にしたり、表示部に隣接する操作部のみを点灯したりする液晶表示装置がある。通常の導光板を使用したサイドライト型のバックライトは全面が均一に光るため、部分的に高輝度にすることはできない。そこで、導光板に貫通孔を設け、この貫通孔の背後に別光源を設けて部分的に異なる輝度で照明できるバックライトが知られている（例えば、特許文献１を参照）。 2. Description of the Related Art In recent years, there are liquid crystal display devices that make a part of a display unit high brightness or light only an operation unit adjacent to the display unit in order to call the user's attention. A side-light type backlight using a normal light guide plate cannot be made partially bright because the entire surface shines uniformly. In view of this, a backlight is known in which a through hole is provided in the light guide plate, and another light source is provided behind the through hole so as to be able to illuminate with partially different brightness (for example, see Patent Document 1).
また、サイドライト型のバックライトで導光板の一部を切り離し、切り離した部分の導光板に入射する光源を点灯消灯することで強調表示する構成が知られている（例えば、特許文献２参照）。 In addition, a configuration is known in which a part of the light guide plate is cut off by a sidelight type backlight, and the light source incident on the light guide plate at the cut off portion is highlighted to turn on and off (for example, see Patent Document 2). .
従来のバックライトでは光源を点灯すると導光板全体が均一に点灯し、部分的に消灯や高輝度点灯を行うことができない。そのため、強調表示を行いたい部分や操作部等を照明するには、別の光源、あるいは複数のバックライトが必要となり、部品点数が多く、組立性が悪く、コストが高くなるという課題があった。本発明は、一つの導光板を持つサイドライト型バックライトで全体発光、部分発光の切り替えが可能な照明装置を実現することを目的とする。 In the conventional backlight, when the light source is turned on, the entire light guide plate is turned on uniformly, and it is not possible to partially turn off or turn on the high brightness. For this reason, in order to illuminate the portion to be highlighted or the operation unit, another light source or a plurality of backlights are required, and there are problems that the number of parts is large, the assemblability is poor, and the cost is high. . An object of the present invention is to realize an illumination device capable of switching between total light emission and partial light emission by a sidelight-type backlight having a single light guide plate.
本発明は、一つの導光板に対して全体発光用のＬＥＤと部分発光用のＬＥＤの２種類のＬＥＤを用意しＬＥＤからの光が導光板に入射する角度を全体発光用のＬＥＤと部分発光用のＬＥＤとで別々の角度から入射する様に配置し、ＬＥＤからの光を反射し導光板外に射出させる発光面の対面に加工される微細構造を特定の方向からの光のみ導光板外に射出する角錐形状もしくは角錐台形状にし、全体発光用の微細構造は全体発光用のＬＥＤからの光のみ導光板外に射出する方向に配置し、部分発光用の微細構造は部分発光用のＬＥＤからの光のみ導光板外に射出する方向に配置する。 In the present invention, two types of LEDs, a total light emitting LED and a partial light emitting LED, are prepared for one light guide plate, and the angle at which light from the LED is incident on the light guide plate is set to the total light emitting LED and the partial light emitting. It is arranged so that it is incident on the LED for different angles, and the microstructure processed on the opposite side of the light emitting surface that reflects the light from the LED and emits it out of the light guide plate, only the light from a specific direction outside the light guide plate The shape for the entire light emission is arranged in the direction in which only the light from the LED for the entire light emission is emitted outside the light guide plate, and the fine structure for the partial light emission is the LED for the partial light emission It arrange | positions in the direction which inject | emits only the light from the outside of a light-guide plate.
このように配置すると全体発光用のＬＥＤを発光させた時は導光板の全体が発光し、部分発光用のＬＥＤを発光させた時は導光板の一部を発光させる事が出来る。 With this arrangement, the entire light guide plate emits light when the entire light emitting LED emits light, and part of the light guide plate can emit light when the partial light emitting LED emits light.
さらに部分発光用の微細構造の角度を複数用意し、対応させるＬＥＤを複数用意する事で複数の部分発光部を用意する事ができ部分発光部の発光部分を制御することが出来る。 Furthermore, by preparing a plurality of angles of the fine structure for partial light emission, and preparing a plurality of corresponding LEDs, a plurality of partial light emission parts can be prepared, and the light emission part of the partial light emission part can be controlled.
これにより、発光部分を状況により分けるために複数のバックライトを使用する必要がなくなり、一つのバックライトにする事が出来る。 Thereby, it is not necessary to use a plurality of backlights in order to divide the light emitting portion according to the situation, and a single backlight can be obtained.
本発明の導光板は一つの導光板で発光する部分を制御出来、部品点数が少なく、組立性が良く低コストで省スペースなバックライトを実現する The light guide plate of the present invention can control the light emitting part with one light guide plate, and has a small number of parts, good assembling, low cost and space saving backlight.
本発明の照明装置は、第一の光源と第二の光源が、導光板の異なる入光面と対向するように配置されている。すなわち、導光板は、第一の光源からの光が入る第一入光面と、第二の光源からの光が入る第二入光面を有している。さらに、導光板には各入光面から取り入れた光を導光して出射する発光面と、発光面と対向する対向面がある。第一の光源と第二の光源は、導光板に異なる角度で入射するように配置されている。したがって、第一入光面と第二入光面は平行ではなく、所定の角度を持っている。導光板の対向面には、導光板内に導かれた光を反射して発光面から出射させる微細構造体が形成されている。微細構造体には、第一の光源からの光のみを反射する反射面を有する第一微細構造と、第二の光源からの光のみを反射する反射面を有する第二微細構造がある。第一微細構造と第二微細構造は、角錐形状または角錐台形状が適している。 In the illumination device of the present invention, the first light source and the second light source are arranged so as to face different light incident surfaces of the light guide plate. That is, the light guide plate has a first light incident surface into which light from the first light source enters and a second light incident surface into which light from the second light source enters. Furthermore, the light guide plate has a light emitting surface that guides and emits light taken from each light incident surface, and a facing surface that faces the light emitting surface. The first light source and the second light source are arranged to enter the light guide plate at different angles. Therefore, the first light incident surface and the second light incident surface are not parallel and have a predetermined angle. On the opposite surface of the light guide plate, a fine structure that reflects the light guided into the light guide plate and emits it from the light emitting surface is formed. The fine structure includes a first fine structure having a reflection surface that reflects only light from the first light source and a second fine structure having a reflection surface that reflects only light from the second light source. A pyramid shape or a truncated pyramid shape is suitable for the first microstructure and the second microstructure.
このような構成によれば、第一の光源を点灯した時の発光領域と第二の光源を点灯した時の発光領域を制御することが可能になる。 According to such a configuration, it is possible to control the light emitting area when the first light source is turned on and the light emitting area when the second light source is turned on.
また、発光面が第一発光領域と第二発光領域に区別できる構成の時に、第一発光領域の直下の対向面には第一微細構造のみを、第二発光領域の直下の対向面には第二微細構造のみを設けた。このような構成によれば、第一の光源を点灯させた時は第一発光領域のみが発光し、第二の光源を点灯させた時は第二発光領域のみが発光するようにできる。
以下、図面に基づいて実施例を説明する。
In addition, when the light emitting surface can be distinguished from the first light emitting region and the second light emitting region, only the first fine structure is provided on the opposite surface immediately below the first light emitting region, and the opposite surface immediately below the second light emitting region is provided. Only the second microstructure was provided. According to such a configuration, when the first light source is turned on, only the first light emitting region emits light, and when the second light source is turned on, only the second light emitting region emits light.
Embodiments will be described below with reference to the drawings.
本実施例によるバックライトを図１〜図５を用いて説明する。図１、図２、図３は本発明によるバックライトを示す模式図である。図４は入射光の方向と微細構造の配置の例を示す模式図である。図５は微細構造の形状の例を示す模式図である。図１（ａ）はバックライトの上面図であり、図１（ｂ）はその断面図である。図１（ａ）に示す様に、導光板３上のＬＥＤの光を入射する面の角度を変えて２面作成する。それぞれの面に全体発光用ＬＥＤ１と部分発光用ＬＥＤ２を面の角度に合わせて配置する。導光板３の発光面６の対面７にＬＥＤからの光を反射し導光板外へ射出させる微細構造を配置する。微細構造は図４に示す様に全体発光用ＬＥＤからの光８の方向に向いた第一微細構造１０と部分発光用ＬＥＤからの光９の方向に向いた第二微細構造１１の２種類に分け、図１の発光面全体４に第一微細構造１０を配置し、部分発光範囲５に第二微細構造１１を配置する。微細構造は図５に示す様にＬＥＤからの光１５が当たる面１２のみ導光板外へ射出する光１６になる様に作られている。その為、全体発光用ＬＥＤ１を発光させた時は第一微細構造１０のみが光り発光面全体４が発光し、部分発光用ＬＥＤ３を発光させた時は第二微細構造１１のみが光る様になり部分発光範囲５のみが光り、一つの導光板で全体発光と部分発光が可能になる。 The backlight according to this embodiment will be described with reference to FIGS. 1, 2 and 3 are schematic views showing a backlight according to the present invention. FIG. 4 is a schematic diagram showing an example of the direction of incident light and the arrangement of fine structures. FIG. 5 is a schematic diagram showing an example of the shape of the fine structure. FIG. 1A is a top view of the backlight, and FIG. 1B is a cross-sectional view thereof. As shown in FIG. 1A, two surfaces are formed by changing the angle of the surface on the light guide plate 3 where the LED light is incident. The entire light emitting LED 1 and the partial light emitting LED 2 are arranged on each surface according to the angle of the surface. A fine structure that reflects light from the LED and emits the light out of the light guide plate is disposed on the facing surface 7 of the light emitting surface 6 of the light guide plate 3. As shown in FIG. 4, there are two types of microstructures: a first microstructure 10 oriented in the direction of light 8 from the LED for overall light emission and a second microstructure 11 oriented in the direction of light 9 from the LED for partial light emission. In other words, the first microstructure 10 is disposed on the entire light emitting surface 4 in FIG. 1, and the second microstructure 11 is disposed in the partial light emission range 5. As shown in FIG. 5, the fine structure is formed so that only the surface 12 on which the light 15 from the LED impinges becomes the light 16 emitted to the outside of the light guide plate. Therefore, when the LED 1 for whole light emission is caused to emit light, only the first fine structure 10 is lit and the whole light emitting surface 4 is emitted, and when the LED 3 for partial light emission is emitted, only the second fine structure 11 is lit. Only the partial light emission range 5 shines, and the entire light emission and partial light emission can be performed with one light guide plate.
図２は部分発光範囲５の位置の位置が違う場合の例である。図２に示す様に部分発光範囲５をＬＥＤの近くに配置した場合でも、第二微細構造１１の向きを部分発光用ＬＥＤ２の向きに向いていれば部分発光が可能である。 FIG. 2 shows an example where the position of the partial light emission range 5 is different. As shown in FIG. 2, even when the partial light emission range 5 is arranged near the LED, partial light emission is possible if the direction of the second fine structure 11 is directed to the direction of the partial light emission LED 2.
図３は部分発光用ＬＥＤ２の位置が違う場合の例である。図３では部分発光用ＬＥＤ２の光が入射する面を新たに設けず導光板の側面に設けているが、第二微細構造１１の向きを部分発光用ＬＥＤ２の向きに向いていれば部分発光が可能である。 FIG. 3 shows an example in which the positions of the partial light emitting LEDs 2 are different. In FIG. 3, the light incident surface of the partial light emitting LED 2 is not newly provided on the side surface of the light guide plate. However, if the second microstructure 11 is directed to the partial light emitting LED 2, partial light emission is performed. Is possible.
本実施例によるバックライトを図６、図４、図５を用いて説明する。本説明では発光範囲が一方の発光範囲が他方の発光範囲に含まれない場合を説明する。図６はバックライトを示す模式図である。図４は入射光の方向と微細構造の配置の例を示す模式図である。図５は微細構造の形状の例を示す模式図である。図６で示す様に導光板３上のＬＥＤの光を入射する面の角度を変えて２面作成する。それぞれの面に主要発光用ＬＥＤ１９と部分発光用ＬＥＤ２を面の角度に合わせて配置する。導光板３の発光面６の対面７にＬＥＤからの光を反射し導光板外へ射出させる微細構造を配置する。 The backlight according to this embodiment will be described with reference to FIGS. In this description, a case where the light emission range is not included in one light emission range will be described. FIG. 6 is a schematic diagram showing a backlight. FIG. 4 is a schematic diagram showing an example of the direction of incident light and the arrangement of fine structures. FIG. 5 is a schematic diagram showing an example of the shape of the fine structure. As shown in FIG. 6, two surfaces are formed by changing the angle of the surface on which the light of the LED on the light guide plate 3 is incident. The main light emitting LED 19 and the partial light emitting LED 2 are arranged on each surface according to the angle of the surface. A fine structure that reflects light from the LED and emits the light out of the light guide plate is disposed on the facing surface 7 of the light emitting surface 6 of the light guide plate 3.
微細構造は図４に示す様に全体発光用ＬＥＤからの光８相当の方向である主要発光用ＬＥＤからの光りの方向に向いた第一微細構造１０と部分発光用ＬＥＤからの光９の方向に向いた第二微細構造１１の２種類に分け、図６の主要発光範囲１８に第一微細構造１０を配置し、部分発光範囲５に第二微細構造１１を配置する。 As shown in FIG. 4, the fine structure is a direction corresponding to the light 8 from the main light-emitting LED, which is the direction corresponding to the light 8 from the whole light-emitting LED, and the direction of the light 9 from the partial light-emitting LED. The first fine structure 10 is arranged in the main light emission range 18 in FIG. 6 and the second fine structure 11 is arranged in the partial light emission range 5.
微細構造は図５に示す様にＬＥＤからの光１５が当たる面１２のみ導光板外へ射出する光１６になる様に作られている。その為、主要発光用ＬＥＤ１９を発光させた時は第一微細構造１０のみが光り主要発光範囲１８が発光し、部分発光用ＬＥＤ２を発光させた時は第二微細構造１１のみが光る様になり部分発光範囲５のみが光り、主要発光用ＬＥＤ１９と部分発光用ＬＥＤ３を両方発光させた時は主要発光範囲１８と部分発光範囲５を合わせた範囲が発光する。 As shown in FIG. 5, the fine structure is formed so that only the surface 12 on which the light 15 from the LED impinges becomes the light 16 emitted to the outside of the light guide plate. Therefore, when the main light emitting LED 19 is caused to emit light, only the first fine structure 10 is illuminated and the main light emitting range 18 is emitted, and when the partial light emitting LED 2 is caused to emit light, only the second fine structure 11 is illuminated. Only the partial light emission range 5 shines, and when both the main light emission LED 19 and the partial light emission LED 3 emit light, the combined range of the main light emission range 18 and the partial light emission range 5 emits light.
本実施例によるバックライトを図７、図８、図５を用いて説明する。本説明では部分発光範囲が２つ存在する場合を説明する。図７はバックライトを示す模式図である。図８は入射光の方向と微細構造の配置の例を示す模式図である。図５は微細構造の形状の例を示す模式図である。図７で示す様に導光板３上のＬＥＤの光を入射する面の角度を変えて３面作成する。それぞれの面に全体発光用ＬＥＤ１と部分発光用ＬＥＤ２と第二部分発光用ＬＥＤ２０を面の角度に合わせて配置する。導光板３の発光面６の対面７にＬＥＤからの光を反射し導光板外へ射出させる微細構造を配置する。 The backlight according to this embodiment will be described with reference to FIGS. In this description, a case where there are two partial light emission ranges will be described. FIG. 7 is a schematic view showing a backlight. FIG. 8 is a schematic diagram showing an example of the direction of incident light and the arrangement of fine structures. FIG. 5 is a schematic diagram showing an example of the shape of the fine structure. As shown in FIG. 7, three surfaces are formed by changing the angle of the surface on which the light of the LED on the light guide plate 3 is incident. The entire light-emitting LED 1, the partial light-emitting LED 2, and the second partial light-emitting LED 20 are arranged on each surface according to the angle of the surface. A fine structure that reflects light from the LED and emits the light out of the light guide plate is disposed on the facing surface 7 of the light emitting surface 6 of the light guide plate 3.
微細構造は図８に示す様に全体発光用ＬＥＤからの光８の方向に向いた第一微細構造１０、部分発光用ＬＥＤからの光９の方向に向いた第二微細構造１１と第二部分発光用ＬＥＤからの光２２の方向に向いた第三微細構造２３の３種類に分け、図７の発光面全体４に第一微細構造１０を配置し、部分発光範囲５に第二微細構造１１を配置し、第二部分発光範囲２０に第三微細構造２３を配置する。 As shown in FIG. 8, the fine structure includes a first fine structure 10 oriented in the direction of light 8 from the LED for overall light emission, a second fine structure 11 oriented in the direction of light 9 from the LED for partial light emission, and a second portion. The first fine structure 10 is arranged on the entire light emitting surface 4 of FIG. 7 and the second fine structure 11 is arranged in the partial light emission range 5 by dividing into three types of the third fine structure 23 facing the direction of the light 22 from the light emitting LED. And the third microstructure 23 is arranged in the second partial light emission range 20.
微細構造は図５に示す様にＬＥＤからの光１５が当たる面１２のみ導光板外へ射出する光１６になる様に作られている。その為、全体発光用ＬＥＤ１を発光させた時は第一微細構造１０のみが光り発光面全体４が発光し、部分発光用ＬＥＤ２を発光させた時は第二微細構造１１のみが光る様になり部分発光範囲５のみが光り、第二部分発光用ＬＥＤ２０を発光させた時は第三微細構造１７のみが光る様になり第二部分発光範囲２１のみが光り、一つの導光板で全体発光と２つの部分発光が可能になる。 As shown in FIG. 5, the fine structure is formed so that only the surface 12 on which the light 15 from the LED impinges becomes the light 16 emitted to the outside of the light guide plate. Therefore, when the LED 1 for whole light emission is made to emit light, only the first fine structure 10 is lit and the whole light emitting surface 4 emits light, and when the LED 2 for partial light emission is made to emit light, only the second fine structure 11 is lit. When only the partial light emission range 5 shines and the second partial light emission LED 20 emits light, only the third fine structure 17 shines, and only the second partial light emission range 21 shines. One partial light emission becomes possible.
次に微細構造の形状を説明する。図５、図９、図１０、図１１、図１２、図１３、図１４は微細構造の形状の例を示す模式図である。図５、図９の形状の場合ＬＥＤからの光が当たる面１２とその面の反対側の面１３が底面に対して４０〜５０度の面に成り、他の面１４は２０度以下に成っている。これによりＬＥＤからの光が当たる面の光は鏡面反射で導光板外に出射する角度に反射される。ＬＥＤからの光が当たる面１２の反対側の面１３に光があたった場合も導光板外に出射する角度に光が反射されるが、ＬＥＤの方向と１８０度反対の面の為、影響が無い。その他の面１４に当たる光１７は反射される光の角度が導光板外に出る角度と成らない為、影響が無い。これにより、特定の角度の光のみ導光板の外部に射出する導光板を作成する事が出来る。 Next, the shape of the microstructure will be described. 5, FIG. 9, FIG. 10, FIG. 11, FIG. 12, FIG. 13 and FIG. 14 are schematic views showing examples of the shape of the fine structure. In the case of the shape of FIG. 5 and FIG. 9, the surface 12 on which the light from the LED hits and the surface 13 opposite to the surface are 40 to 50 degrees with respect to the bottom surface, and the other surface 14 is 20 degrees or less. ing. As a result, the light on the surface on which the light from the LED hits is reflected at an angle at which it exits the light guide plate by specular reflection. Even when light strikes the surface 13 opposite to the surface 12 on which the light from the LED strikes, the light is reflected at an angle that exits from the light guide plate. However, because the surface is 180 degrees opposite to the LED direction, there is an effect. No. The light 17 that strikes the other surface 14 has no effect because the angle of the reflected light does not become the angle that goes out of the light guide plate. This makes it possible to create a light guide plate that emits only light at a specific angle to the outside of the light guide plate.
図１０、図１１、図１２、図１３の形状の場合ＬＥＤからの光を反射する面１２が底面に対して４０〜５０度の面に成り、他の面１４は２０度以下に成っている。これによりＬＥＤからの光が当たる面１２の光は鏡面反射で導光板外に出射する角度に反射される。その他の面１４に当たる光１７は反射される光の角度が導光板外に出る角度と成らない為、影響が無い。これにより、特定の角度の光のみ導光板の外部に射出する導光板を作成する事が出来る。 In the case of the shape of FIG. 10, FIG. 11, FIG. 12, FIG. 13, the surface 12 that reflects the light from the LED is a surface of 40 to 50 degrees with respect to the bottom surface, and the other surface 14 is 20 degrees or less. . Thereby, the light of the surface 12 which the light from LED hits is reflected by the angle which radiate | emits out of a light-guide plate by specular reflection. The light 17 that strikes the other surface 14 has no effect because the angle of the reflected light does not become the angle that goes out of the light guide plate. This makes it possible to create a light guide plate that emits only light at a specific angle to the outside of the light guide plate.
図１４の形状の場合ＬＥＤからの光が当たる面１２とその面の反対側の面１３が底面に対して４０〜５０度の面に成り、その他の面１４が曲面に成っている。これによりＬＥＤからの光が当たる面１２の光は鏡面反射で導光板外に出射する角度に反射される。ＬＥＤからの光が当たる面１２の反対側の面１３に光があたった場合も導光板外に出射する角度に光が反射されるが、ＬＥＤの方向と１８０度反対の面の為、影響が無い。その他の面１４に当たる光１７は曲面の為、光が散乱され特定の角度に反射しない為、影響が無い。これにより、特定の角度の光のみ導光板の外部に射出する導光板を作成する事が出来る。 In the case of the shape of FIG. 14, the surface 12 on which the light from the LED strikes and the surface 13 opposite to the surface are 40 to 50 degrees with respect to the bottom surface, and the other surface 14 is a curved surface. Thereby, the light of the surface 12 which the light from LED hits is reflected by the angle which radiate | emits out of a light-guide plate by specular reflection. Even when light strikes the surface 13 opposite to the surface 12 on which the light from the LED strikes, the light is reflected at an angle that exits from the light guide plate. However, because the surface is 180 degrees opposite to the LED direction, there is an effect. No. Since the light 17 that hits the other surface 14 is a curved surface, the light is scattered and does not reflect at a specific angle, so there is no influence. This makes it possible to create a light guide plate that emits only light at a specific angle to the outside of the light guide plate.
次に本発明を使用した表示装置を図１５、図８を用いて説明する。図１５は本発明を用いた表示装置の例を示す模式図である。図８は入射光の方向と微細構造の配置の例を示す模式図である。 Next, a display device using the present invention will be described with reference to FIGS. FIG. 15 is a schematic view showing an example of a display device using the present invention. FIG. 8 is a schematic diagram showing an example of the direction of incident light and the arrangement of fine structures.
導光板３に対して、主要発光用ＬＥＤ１９と部分発光用ＬＥＤ２を導光板に入射する角度を変更して配置する。導光板の発光面の対面にＬＥＤからの光を反射し導光板外へ射出させる微細構造を配置する。その際に図８に示すようにＬＥＤからの光を導光板外に射出させる面の方向を主要部発光用ＬＥＤの方向に向けた微細構造８とＬＥＤからの光を導光板外に射出させる面の方向を部分発光用ＬＥＤ１０に向けた微細構造の２種類に分け、ＬＥＤからの光を導光板外に射出させる発光面の方向を主要部発光用ＬＥＤに向けた微細構造を主要発光範囲１８に配置し、ＬＥＤからの光を導光板外に射出させる発光面の方向を部分発光用ＬＥＤに向けた微細構造を発光面の一部にある部分発光範囲５に配置する。 The main light-emitting LED 19 and the partial light-emitting LED 2 are arranged with respect to the light guide plate 3 while changing the angle of incidence on the light guide plate. A fine structure that reflects light from the LED and emits it out of the light guide plate is disposed on the opposite side of the light emitting surface of the light guide plate. At that time, as shown in FIG. 8, the surface 8 for emitting light from the LED to the outside of the light guide plate and the fine structure 8 in which the direction of the surface for emitting light from the LED to the direction of the main light emitting LED and the surface for emitting light from the LED to the outside of the light guide plate Is divided into two types of fine structures directed to the LED 10 for partial light emission, and the fine structure directed to the LED for main light emission is set to the main light emission range 18 with the direction of the light emitting surface for emitting light from the LED outside the light guide plate The fine structure in which the direction of the light emitting surface for emitting the light from the LED to the outside of the light guide plate is directed to the LED for partial light emission is arranged in the partial light emission range 5 in a part of the light emitting surface.
導光板の発光面６の上方に液晶等の表示装置２４と透過光により点灯する操作部２５を配置する。その際、表示装置２４を主要発光範囲１８からの光２６が入射される部分、操作部を部分発光範囲５の光２７が入射される部分に配置する。
これにより、独立した表示装置２４の発光が必要な時は主要発光部用のＬＥＤ１９を点灯、独立して操作部２５を点灯したいときは部分発光用ＬＥＤ２を発光させれば良く、発光部の発光範囲をひとつの導光板で制御できる。
A display device 24 such as a liquid crystal and an operation unit 25 that is lit by transmitted light are disposed above the light emitting surface 6 of the light guide plate. At that time, the display device 24 is disposed in a portion where the light 26 from the main light emission range 18 is incident, and the operation unit is disposed in a portion where the light 27 in the partial light emission range 5 is incident.
Thereby, when the light emission of the independent display device 24 is necessary, the LED 19 for the main light emitting unit is turned on, and when the operation unit 25 is to be turned on independently, the partial light emitting LED 2 may be made to emit light. The range can be controlled by a single light guide plate.
本発明の照明装置は発光する範囲を制御する事ができ、表示装置、照明装置で発光範囲を調整する必要のある用途に使用できる。特に携帯機器において操作部と表示部を必要な時に点灯する事で操作ミスを防ぐ、低消費電力化をするために用いることが出来る。 The illuminating device of the present invention can control the light emission range, and can be used for applications where the light emission range needs to be adjusted by a display device or a lighting device. In particular, in a portable device, the operation unit and the display unit can be turned on when necessary to prevent an operation error and reduce power consumption.
１ 全体発光用ＬＥＤ
２ 部分発光用ＬＥＤ
３ 導光板
４ 発光面全体
５ 部分発光範囲
６ 発光面
７ 発光面の対面
８ 全体発光用ＬＥＤからの光
９ 部分発光用ＬＥＤからの光
１０ 第一微細構造
１１ 第二微細構造
１２ ＬＥＤからの光が当たる面
１３ ＬＥＤからの光を当たる面の反対側の面
１５ ＬＥＤからの光
１６ 導光板外に射出される光
１７ その他の面に当たる光
１８ 主要発光範囲
１９ 主要発光用ＬＥＤ
２０ 第二部分発光用ＬＥＤ
２１ 第二部分発光範囲
２２ 第二部分発光用ＬＥＤからの光
２３ 第三微細構造
1 LED for whole light emission
2 LED for partial light emission
DESCRIPTION OF SYMBOLS 3 Light-guide plate 4 The whole light emission surface 5 Partial light emission range 6 Light emission surface 7 Opposite of a light emission surface 8 Light from LED for whole light emission 9 Light from LED for partial light emission 10 1st fine structure 11 2nd fine structure 12 Light from LED 13 The surface on the opposite side of the surface that strikes the light from the LED 15 The light from the LED 16 The light emitted outside the light guide plate 17 The light that strikes the other surface 18 The main light emitting range 19 The main light emitting LED
20 Second partial light emitting LED
21 Second partial emission range 22 Light from second partial emission LED 23 Third microstructure
Claims (3)
第二の光源と、
前記第一の光源からの光が入る第一入光面と、前記第二の光源からの光が入る第二入光面と、前記第一入光面と前記第二入光面から取り入れた光を導光して出射する発光面と、前記発光面と対向する対向面を有する導光板と、を備え、
前記第一の光源と前記第二の光源は、前記導光板に異なる角度で入射するように配置され、
前記第一の光源からの光のみを反射する反射面を有する第一微細構造と、前記第二の光源からの光のみを反射する反射面を有する第二微細構造が、前記対向面に形成されたことを特徴とする照明装置。 A first light source;
A second light source;
The first light incident surface into which light from the first light source enters, the second light incident surface into which light from the second light source enters, the first light incident surface, and the second light incident surface. A light emitting surface for guiding and emitting light, and a light guide plate having a facing surface facing the light emitting surface,
The first light source and the second light source are arranged to enter the light guide plate at different angles,
A first microstructure having a reflecting surface that reflects only light from the first light source and a second microstructure having a reflecting surface that reflects only light from the second light source are formed on the facing surface. A lighting device characterized by that.
前記第一の発光領域の直下の対向面には前記第一微細構造のみが、前記第二の発光領域の直下の対向面には前記第二微細構造のみが設けられたことを特徴とする請求項１に記載の照明装置。 The light emitting surface has a first light emitting region and a second light emitting region,
Only the first microstructure is provided on the opposing surface immediately below the first light emitting region, and only the second microstructure is provided on the opposing surface immediately below the second light emitting region. Item 2. The lighting device according to Item 1.
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