JP2013089539A - Flat lamp device - Google Patents

Flat lamp device Download PDF

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JP2013089539A
JP2013089539A JP2011231076A JP2011231076A JP2013089539A JP 2013089539 A JP2013089539 A JP 2013089539A JP 2011231076 A JP2011231076 A JP 2011231076A JP 2011231076 A JP2011231076 A JP 2011231076A JP 2013089539 A JP2013089539 A JP 2013089539A
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Japan
Prior art keywords
lamp device
light source
base material
flat
translucent cover
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JP2011231076A
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JP5232283B2 (en
Inventor
Masahiro Yokota
昌広 横田
Osamu Ono
修 小野
Shusuke Morita
修介 森田
Takeshi Takahashi
高橋　　健
Nobuo Kawamura
信雄 川村
Takeshi Okawa
猛 大川
Hideo Ota
英男 太田
Shuzo Matsuda
秀三 松田
Koji Nishimura
孝司 西村
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Toshiba Corp
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Toshiba Corp
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Priority to JP2011231076A priority Critical patent/JP5232283B2/en
Priority to PCT/JP2012/071325 priority patent/WO2013058013A1/en
Publication of JP2013089539A publication Critical patent/JP2013089539A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/66—Details of globes or covers forming part of the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
    • F21Y2103/33—Elongate light sources, e.g. fluorescent tubes curved annular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a flat lamp device capable of irradiating all from side faces to a rear face.SOLUTION: The flat lamp device is provided with a flat base material 2, a plurality of light sources 4 arranged at peripheral areas on the base material and having light distribution with high directivity in a normal direction, and a translucent cover 6 covering the light sources. The translucent cover is provided with a hollow protruded part 10 opposed to at least parts of the light sources 4 and protruded in a direction away from the base material.

Description

本発明の実施形態は、例えばＧＸ５３形口金を有する扁平型のランプ装置に関する。   The embodiment of the present invention relates to a flat type lamp device having, for example, a GX53 type base.

扁平かつコンパクトなランプ装置として、例えばＧＸ５３形口金を用いた扁平円筒型のランプ装置が知られている。このような扁平型ランプ装置では、扁平なＧＸ５３形口金を用いるとともに、扁平な本体に扁平に光源を配置し、扁平なカバーを組み合わせることで、全体として扁平なランプ装置を実現している。扁平型ランプ装置において、側面あるいは背面側まで照射する用途に対応する技術としては、カバー部材の周縁部をランプ装置の側面側まで延ばし、導光する技術がある。   As a flat and compact lamp device, for example, a flat cylindrical lamp device using a GX53 type base is known. In such a flat lamp device, a flat lamp device is realized as a whole by using a flat GX53 type base, arranging a flat light source on a flat main body, and combining a flat cover. In the flat type lamp device, as a technology corresponding to the application of irradiating the side surface or the back surface side, there is a technology for extending the peripheral edge of the cover member to the side surface side of the lamp device and guiding the light.

特開２００８−１４０６０６号公報JP 2008-140606 A 特開２０１０−１９２３３８号公報JP 2010-192338 A

扁平型ランプ装置では、扁平面の法線方向に強く光を照射し、ランプ装置の側面あるいは背面側には極端に弱い光しか放出することができない。この傾向は、ＬＥＤ光源を用いた場合に特に顕著となる。カバー部材を用いた場合でも、ランプ装置の側面から背面側への照度が弱い。   In the flat lamp device, light is radiated strongly in the normal direction of the flat surface, and only extremely weak light can be emitted to the side surface or the back surface side of the lamp device. This tendency is particularly remarkable when an LED light source is used. Even when the cover member is used, the illuminance from the side surface to the back surface side of the lamp device is weak.

この発明は以上の点を鑑みてなされたもので、その課題は、側面から背面側まで照射することが可能な扁平型ランプ装置を提供することにある。   The present invention has been made in view of the above points. An object of the present invention is to provide a flat type lamp device capable of irradiating from the side surface to the back surface side.

実施形態によれば、扁平型のランプ装置は、扁平な基材と、前記基材上の周辺領域に配置され法線方向への指向性の強い配光を有する複数の光源と、前記光源を覆う透光カバーと、を備え、前記透光カバーは、前記少なくとも一部の光源と対向し前記基材から離れる方向に突出する中空の突部を有する。   According to the embodiment, a flat type lamp device includes a flat base material, a plurality of light sources arranged in a peripheral region on the base material and having a light distribution with strong directivity in a normal direction, and the light source. A translucent cover, and the translucent cover has a hollow protrusion that faces the at least part of the light source and protrudes in a direction away from the base material.

図１は、第１の実施形態に係る扁平型ランプ装置を示す断面図。FIG. 1 is a cross-sectional view illustrating a flat lamp device according to a first embodiment. 図２は、第１の実施形態に係る扁平型ランプ装置の配光分布を示す図。FIG. 2 is a view showing a light distribution of the flat lamp device according to the first embodiment. 図３は、前記扁平型ランプ装置における透光カバー６の透過率を変化させたときの配光角と効率との関係を示す図。FIG. 3 is a diagram showing the relationship between the light distribution angle and the efficiency when the transmittance of the translucent cover 6 in the flat lamp device is changed. 図４は、前記扁平型ランプ装置における透光カバーの凸部の高さｈを変えたときの配光角と効率との関係を示す図。FIG. 4 is a diagram showing the relationship between the light distribution angle and the efficiency when the height h of the convex portion of the translucent cover in the flat lamp device is changed. 図５は、第２の実施形態に係る扁平型ランプ装置を示す断面図。FIG. 5 is a cross-sectional view showing a flat type lamp device according to a second embodiment. 図６は、第３の実施形態に係る扁平型ランプ装置を示す断面図。FIG. 6 is a cross-sectional view showing a flat lamp device according to a third embodiment. 図７は、第４の実施形態に係る扁平型ランプ装置を示す断面図。FIG. 7 is a sectional view showing a flat lamp device according to a fourth embodiment. 図８は、第５の実施形態に係る扁平型ランプ装置を示す断面図。FIG. 8 is a cross-sectional view showing a flat lamp device according to a fifth embodiment. 図９は、第６の実施形態に係る扁平型ランプ装置を示す断面図。FIG. 9 is a cross-sectional view showing a flat lamp device according to a sixth embodiment. 図１０は、第７の実施形態に係る扁平型ランプ装置を示す断面図。FIG. 10 is a cross-sectional view showing a flat lamp device according to a seventh embodiment.

以下、図面を参照しながら、種々の実施形態に係る扁平型のランプ装置について詳細に説明する。
（第１の実施形態）
図１は、第１の実施形態に係る扁平型ランプ装置１を示す断面図である。扁平型ランプ装置１は、扁平な円筒形状であり、図示した断面を中心軸に対して回転させた形状を有している。 Hereinafter, flat lamp devices according to various embodiments will be described in detail with reference to the drawings.
(First embodiment)
FIG. 1 is a cross-sectional view showing a flat lamp device 1 according to the first embodiment. The flat lamp device 1 has a flat cylindrical shape, and has a shape obtained by rotating the illustrated cross section with respect to a central axis.

扁平型ランプ装置１は、扁平な円盤状の基材２、口金３、光源４を実装した基板５、透光カバー６を備えている。基材２は金属製であり、平坦な前面部２ａを有している。基材２は、光源４で発生した熱のヒートシンクであるとともに、図示しない放熱構造より外部に放熱する機能を有している。   The flat lamp device 1 includes a flat disk-shaped base material 2, a base 3, a substrate 5 on which a light source 4 is mounted, and a translucent cover 6. The base material 2 is made of metal and has a flat front surface portion 2a. The substrate 2 is a heat sink for heat generated by the light source 4 and has a function of radiating heat from a heat dissipation structure (not shown).

口金３は、扁平なＧＸ５３形ソケットに適合する段付きの円盤状に形成され、基材２の背面側に埋め込まれている。口金３は、ＧＸ５３形ソケットに適合する複数の端子３ａを有し、内部に駆動回路３ｂを収納している。端子３ａを通して駆動回路３ｂに通電され、この駆動回路によって発生した駆動電力により、基板５を介して光源４を点灯する。   The base 3 is formed in a stepped disk shape that fits into a flat GX53 type socket, and is embedded in the back side of the substrate 2. The base 3 has a plurality of terminals 3a suitable for the GX53 type socket, and houses a drive circuit 3b therein. The drive circuit 3b is energized through the terminal 3a, and the light source 4 is turned on via the substrate 5 by the drive power generated by the drive circuit.

基材２の前面部２ａ上に、例えば、円板状の基板５が固定され、この基板５上に複数の光源４が実装されている。光源４は、ＬＥＤを用いており、基板５の法線方向、すなわち扁平面の法線方向に強い光を照射し、法線方向からの角度をθとするとき、ｃｏｓθに比例して側面方向への光度が弱くなっていく指向性を有している。本実施形態では、直径８０ｍｍの基材２に対して、その周辺から５ｍｍ内側に複数の光源４が基材２と同軸のサークル状に配置されている。   For example, a disk-shaped substrate 5 is fixed on the front surface portion 2 a of the base material 2, and a plurality of light sources 4 are mounted on the substrate 5. The light source 4 uses an LED, emits strong light in the normal direction of the substrate 5, that is, the normal direction of the flat surface, and when the angle from the normal direction is θ, the side direction is proportional to cos θ. It has directivity that the intensity of light is weakened. In the present embodiment, a plurality of light sources 4 are arranged in a circle coaxial with the base material 2 on the inner side 5 mm from the periphery of the base material 2 with a diameter of 80 mm.

透光カバー６は、透過率５７％の乳白樹脂により、ほぼ円盤状に形成されている。透光カバー６は、光源４および基材２の前面部２ａを覆うように基材２に被せられ、透光カバー６の周縁部が基材２に密閉固定されている。透光カバー６は、光源４に対向する環状のかつ中空の突部１０を有している。また、透光カバー６の中央部分は、その中心から突部１０に向かって僅かに上方へ、すなわち、基材２から離れる方向へ、緩やかに湾曲している。突部１０は、例えば、基材２に対して前方へ突出する楕円の断面形状を有している。突部１０の楕円断面は、最高点が光源４と一致する径方向位置にあり、光源４の内側および外側に楕円傾斜面を有している。   The translucent cover 6 is formed in a substantially disk shape from a milky white resin having a transmittance of 57%. The translucent cover 6 is placed on the base material 2 so as to cover the light source 4 and the front surface portion 2 a of the base material 2, and the peripheral portion of the translucent cover 6 is hermetically fixed to the base material 2. The translucent cover 6 has an annular and hollow protrusion 10 that faces the light source 4. In addition, the central portion of the translucent cover 6 is gently curved upward from the center toward the protrusion 10, that is, in a direction away from the base material 2. The protrusion 10 has, for example, an elliptical cross-sectional shape that protrudes forward with respect to the base material 2. The elliptical cross section of the protrusion 10 is located at the radial position where the highest point coincides with the light source 4, and has elliptical inclined surfaces inside and outside the light source 4.

図１に示すように、突部１０は、径方向の幅に対して、基材２の法線方向の高さが高い縦長の断面形状に形成されている。すなわち、突部１０の断面の輪郭と基材２の光源４よりも外側部分との交点と、光源４と、の径方向距離をｄｏ、同様に突部１０の断面の輪郭と基材２の光源４より内側部分との交点と、光源４との径方向距離をｄｉとし、透光カバー６の断面の最高点と基材２上の基板５実装面との高さ方向距離をｈとするとき、実施形態ではｄｉ＝ｄｏ＝５ｍｍ、ｈ＝２０ｍｍとしている。   As shown in FIG. 1, the protrusion 10 is formed in a vertically long cross-sectional shape in which the height in the normal direction of the base material 2 is higher than the radial width. In other words, the radial distance between the intersection of the cross section of the protrusion 10 and the outer side of the light source 4 of the base 2 and the light source 4 is do, and similarly, the cross section of the protrusion 10 and the base 2 The distance in the radial direction between the intersection between the light source 4 and the inner side of the light source 4 and the light source 4 is di, and the height direction distance between the highest point of the cross section of the translucent cover 6 and the mounting surface of the substrate 5 on the substrate 2 is h. In the embodiment, di = do = 5 mm and h = 20 mm.

このような透光カバー６は、光源４から放出された扁平面の法線方向に指向性の強い光を一旦受け、透光カバー６内部で十分に拡散させた後に、透光カバー６の局所的な面法線方向に強い指向性をもって外部に光を放出する。本実施形態では、光源４を覆う透光カバー６の突部１０の断面が十分に縦長となっている、すなわち、基材２の前面部２ａに対して法線方向に縦長となっている。そのため、扁平面法線方向の光度に対して半減する光度となる角度範囲を配光角と定義したとき、配光角は１６０度にまで拡がっている。また、透光カバー６は、周辺に向かって回転対象に光を放出する。   Such a translucent cover 6 receives light having a strong directivity in the normal direction of the flat surface emitted from the light source 4 and diffuses it sufficiently inside the translucent cover 6. Light is emitted to the outside with strong directivity in the normal surface normal direction. In the present embodiment, the cross section of the protrusion 10 of the translucent cover 6 that covers the light source 4 is sufficiently vertically long, that is, vertically long in the normal direction with respect to the front surface portion 2 a of the substrate 2. Therefore, when the angle range where the luminous intensity is halved with respect to the luminous intensity in the normal direction of the flat plane is defined as the luminous intensity distribution angle, the luminous intensity distribution extends to 160 degrees. The translucent cover 6 emits light toward the rotation target toward the periphery.

図２は、本実施形態の扁平型ランプ装置１の配光分布を示している。この図より、扁平型ランプ装置１が放出する光の光度は、法線方向となす角度が４５度までほぼ均一の光度であり、８０度付近で半減するが、９０度を超える背面側へもしっかり放出されていることが判る。   FIG. 2 shows the light distribution of the flat lamp device 1 of the present embodiment. From this figure, the luminous intensity of the light emitted from the flat lamp device 1 is substantially uniform until the angle formed with the normal direction is 45 degrees, and is halved at around 80 degrees, but also on the back side exceeding 90 degrees. It can be seen that it is released firmly.

図３は、本実施形態において、透光カバー６の透過率を変化させたときの配光角と効率の影響を評価した結果を示している。図において、実線は配光角を示し、一点鎖線は効率を示している。この図から、透光カバー６の透過率は８０％以下にしないと配光角は十分に拡がらないことが分かる。これは、透過率が高いと透光カバー６内部での拡散が不十分のまま光源４自体の配光を保って光が透けてしまうためである。   FIG. 3 shows a result of evaluating the influence of the light distribution angle and efficiency when the transmittance of the light-transmitting cover 6 is changed in the present embodiment. In the figure, the solid line indicates the light distribution angle, and the alternate long and short dash line indicates the efficiency. From this figure, it can be seen that the light distribution angle cannot be sufficiently expanded unless the transmittance of the light-transmitting cover 6 is 80% or less. This is because if the transmittance is high, light is transmitted through while maintaining the light distribution of the light source 4 itself with insufficient diffusion inside the light-transmitting cover 6.

図４は、本実施形態において、透光カバー６の透過率は５７％として、突部１０の高さｈを変えたときの配光角と効率の影響を評価した結果を示している。図において、実線は配光角を示し、一点鎖線は効率を示している。この図から、ｈ／ｄｉ（あるいはｈ／ｄｏ）が１、すなわち、楕円断面が球断面形状に近付くと、配光角は光源４自体と同じになってしまい拡がらない。配光角を広げるためには、突部１０を縦長にするとよく、したがって、ｈ／ｄｉ（あるいはｈ／ｄｏ）は１より大きくすることが望ましい。   FIG. 4 shows the results of evaluating the influence of the light distribution angle and efficiency when the transmissivity of the translucent cover 6 is 57% and the height h of the protrusion 10 is changed in this embodiment. In the figure, the solid line indicates the light distribution angle, and the alternate long and short dash line indicates the efficiency. From this figure, when h / di (or h / do) is 1, that is, when the elliptical cross section approaches the spherical cross sectional shape, the light distribution angle becomes the same as that of the light source 4 itself and does not spread. In order to widen the light distribution angle, it is preferable to make the protrusion 10 vertically long. Therefore, it is desirable that h / di (or h / do) be larger than 1.

以上のように構成された第１の実施形態によれば、透光カバー６により、装置の側面から背面側にかけてもかなりの光を照射することができ、広い配光の扁平型ランプ装置を実現することができる。   According to the first embodiment configured as described above, the translucent cover 6 can irradiate a considerable amount of light from the side surface to the back side of the device, and realizes a flat lamp device with a wide light distribution. can do.

次に、他の実施形態に係る扁平型ランプ装置について説明する。後述する他の実施形態において、前述した第１の実施形態と同一の部分には同一の参照符号を付してその詳細な説明を省略する。   Next, a flat lamp device according to another embodiment will be described. In other embodiments to be described later, the same parts as those in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

（第２の実施形態）
図５は、第２の実施形態に係る扁平型ランプ装置１を示す断面図である。ランプ装置１の基本的な構成は第１の実施形態と同じであり、透光カバー６の構成が一部相違している。第２の実施形態では、透光カバー６の中央領域は平坦に形成され、基材２の前面部２ａに隣接対向している。これにより、透光カバー６の突部１０において、光源４の内側に位置する切り立った部分の面積を大きくし、より配光角が拡がるようにしている。 (Second Embodiment)
FIG. 5 is a cross-sectional view showing a flat lamp device 1 according to the second embodiment. The basic configuration of the lamp device 1 is the same as that of the first embodiment, and the configuration of the translucent cover 6 is partially different. In the second embodiment, the central region of the translucent cover 6 is formed flat and faces the front surface portion 2 a of the base material 2 adjacently. Thereby, in the protrusion 10 of the translucent cover 6, the area of the raised portion located inside the light source 4 is increased so that the light distribution angle is further expanded.

（第３の実施形態）
図６は、第３の実施形態に係る扁平型ランプ装置１を示す断面図である。ランプ装置１の基本的な構成は第１の実施形態と同じであり、透光カバー６の構成が一部相違している。第３の実施形態では、透光カバー６の光源４を覆う突部１０の断面形状を矩形とし、光源４に対向する領域で光が透けにくくなるように、この部分を他の部分よりも局所的に厚くしている。 (Third embodiment)
FIG. 6 is a cross-sectional view showing a flat lamp device 1 according to the third embodiment. The basic configuration of the lamp device 1 is the same as that of the first embodiment, and the configuration of the translucent cover 6 is partially different. In the third embodiment, the cross-sectional shape of the protrusion 10 that covers the light source 4 of the translucent cover 6 is rectangular, and this portion is more localized than the other portions so that light is less likely to pass through the region facing the light source 4. It is thick.

（第４の実施形態）
図７は、第４の実施形態に係る扁平型ランプ装置１を示す断面図である。ランプ装置１の基本的な構成は第１の実施形態と同じであり、透光カバー６の構成が一部相違している。第３の実施形態では、透光カバー６の光源４を覆う突部１０の断面形状を矩形とし、光源４に対向する部分を例えば、波状に凹凸させることで、厚くすることなく同部分で光を透けにくくしている。 (Fourth embodiment)
FIG. 7 is a cross-sectional view showing a flat lamp device 1 according to the fourth embodiment. The basic configuration of the lamp device 1 is the same as that of the first embodiment, and the configuration of the translucent cover 6 is partially different. In the third embodiment, the cross-sectional shape of the protrusion 10 that covers the light source 4 of the translucent cover 6 is rectangular, and the portion facing the light source 4 is lightened in the same portion without increasing the thickness by, for example, corrugating it. It is hard to see through.

（第５の実施形態）
図８は、第５の実施形態に係る扁平型ランプ装置１を示す断面図である。ランプ装置１の基本的な構成は第１の実施形態と同じであり、透光カバー６の構成が一部相違している。第５の実施形態によれば、複数の光源４を基材２の外周縁からやや内側にｄｏ＝１０ｍｍの位置に配置させ、光源４を覆う透光カバー６の突部１０は内外対称の楕円断面とした。ｄｉは５ｍｍであり、楕円断面の最高点は光源４よりも外側にずれている。このため、光源４から最も強い光度で放出される扁平面法線方向の光が透光カバー６に斜めに入射することになり、透光カバー６が薄くても透けにくく、かつ、配光を広げる効果が向上する。 (Fifth embodiment)
FIG. 8 is a cross-sectional view showing a flat lamp device 1 according to the fifth embodiment. The basic configuration of the lamp device 1 is the same as that of the first embodiment, and the configuration of the translucent cover 6 is partially different. According to the fifth embodiment, a plurality of light sources 4 are arranged at a position where do = 10 mm slightly inward from the outer peripheral edge of the substrate 2, and the protrusion 10 of the translucent cover 6 covering the light sources 4 is an elliptical symmetrical inside and outside. A cross section. di is 5 mm, and the highest point of the elliptical cross section is shifted outward from the light source 4. For this reason, the light in the normal direction of the flat plane emitted from the light source 4 with the strongest light intensity is incident obliquely on the translucent cover 6, and even if the translucent cover 6 is thin, it is difficult to transmit, and the light distribution The effect of spreading is improved.

（第６の実施形態）
図９は、第６の実施形態に係る扁平型ランプ装置１を示す断面図である。ランプ装置１の基本的な構成は第１の実施形態と同じであり、透光カバー６の構成が一部相違している。第６の実施形態によれば、複数の光源４を基材２の外周縁からやや内側にｄｏ＝１０ｍｍの位置に配置させ、光源４を覆う透光カバー６の突部１０は内外対称の楕円断面とした。また、突部１０の断面形状は、ｄｉ＝ｄｏ＝５ｍｍと縦長アスペクトになるように、ｄ０を小さくしている。これにより、楕円断面の最高点が光源４の径方向位置と一致している。 (Sixth embodiment)
FIG. 9 is a cross-sectional view showing a flat lamp device 1 according to the sixth embodiment. The basic configuration of the lamp device 1 is the same as that of the first embodiment, and the configuration of the translucent cover 6 is partially different. According to the sixth embodiment, the plurality of light sources 4 are arranged at a position where do = 10 mm slightly inward from the outer peripheral edge of the base material 2, and the protrusion 10 of the translucent cover 6 covering the light source 4 is an elliptical symmetrical inside and outside. A cross section. Moreover, d0 is made small so that the cross-sectional shape of the protrusion 10 may have a vertically long aspect of di = do = 5 mm. Thereby, the highest point of the elliptical cross section coincides with the radial position of the light source 4.

この場合、透光カバー６の外周端部に平坦なフランジ部６ｂができるが、あるいは、フランジ部を設けない場合は、基材２の外周縁部が剥き出しになるが、透光カバー６の光源４を突部１０の断面形状が縦長となり、配光角の広がりが向上する。   In this case, a flat flange portion 6b is formed at the outer peripheral end portion of the translucent cover 6, or when the flange portion is not provided, the outer peripheral edge portion of the substrate 2 is exposed, but the light source of the translucent cover 6 4, the cross-sectional shape of the protrusion 10 becomes vertically long, and the spread of the light distribution angle is improved.

（第７の実施形態）
図１０は、第７の実施形態に係る扁平型ランプ装置１を示す断面図である。ランプ装置１の基本的な構成は第１の実施形態と同じであり、透光カバー６の構成が一部相違している。第７の実施形態によれば、基材２の中央にも補助的に光源４を配置され、透光カバー６は、この中央の光源４と対向する断面楕円形状の中央突部１０ｂを更に有している。このような構成とすることにより、ランプ装置１の側面側および背面側に加えて、補助的に中央部前方領域にも光を照射し、補助的に中央領域を明るくすることができる。 (Seventh embodiment)
FIG. 10 is a cross-sectional view showing a flat lamp device 1 according to the seventh embodiment. The basic configuration of the lamp device 1 is the same as that of the first embodiment, and the configuration of the translucent cover 6 is partially different. According to the seventh embodiment, the light source 4 is additionally arranged at the center of the base material 2, and the translucent cover 6 further has a central protrusion 10 b having an elliptical cross section facing the central light source 4. doing. By setting it as such a structure, in addition to the side surface side and the back surface side of the lamp apparatus 1, light can be supplementarily irradiated to the center front region, and the center region can be supplementarily brightened.

上述した第２ないし第７の実施形態によれば、第１の実施形態と同様に、側面から背面側まで照射することが可能な扁平型ランプ装置を提供することができる。   According to the 2nd thru | or 7th embodiment mentioned above, the flat type lamp device which can be irradiated from a side surface to a back side can be provided similarly to 1st Embodiment.

本発明は上記実施形態そのままに限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形して具体化できる。また、上記実施形態に開示されている複数の構成要素の適宜な組み合わせにより、種々の発明を形成できる。例えば、実施形態に示される全構成要素から幾つかの構成要素を削除してもよい。さらに、異なる実施形態にわたる構成要素を適宜組み合わせてもよい。
例えば、光源の数や種類を特に規定するものではなく、前方に強い指向性のある光源であれば本発明の作用を適用することができる。透光カバーは、その全体が、透過率８０％以下に形成されているが、これに限らず、少なくとも突部の部分が透過率８０％以下に形成されていればよい。 The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.
For example, the number and type of light sources are not particularly specified, and the action of the present invention can be applied to any light source having strong directivity in the front. The entire translucent cover is formed with a transmittance of 80% or less. However, the present invention is not limited to this, and it is sufficient that at least the projecting portion is formed with a transmittance of 80% or less.

１…扁平型ランプ装置、２…基材、２ａ…前面部、３…口金、４…光源、
６…透光カバー、１０…突部、１０ｂ…中央突部 DESCRIPTION OF SYMBOLS 1 ... Flat type lamp apparatus, 2 ... Base material, 2a ... Front part, 3 ... Base, 4 ... Light source,
6 ... Translucent cover, 10 ... Projection, 10b ... Center projection

実施形態によれば、扁平型のランプ装置は、扁平な基材と、前記基材上の周辺領域に配置され法線方向への指向性の強い配光を有する複数の光源と、前記光源を覆う透光カバーと、を備え、前記透光カバーは、前記少なくとも一部の光源と対向し前記基材から離れる方向に突出する中空の突部を有し、少なくとも前記透光カバーの突部の透過率は８０％以下であり、前記突部は、径方向の幅に対して、前記基材の法線方向の高さが高い縦長の断面形状に形成され、前記突部は、前記基材から透光カバーの最高点までの距離をｈ、突部断面を輪郭と前記基材の前記光源より内側部分との交点から、前記光源までの径方向距離をｄｉ、前記突部断面を輪郭と前記基材の前記光源より外側部分との交点から、前記光源までの径方向距離をｄ０、とするとき、
（ｈ／ｄi）＞１ あるいは （ｈ／ｄ０）＞１
である。 According to the embodiment, a flat type lamp device includes a flat base material, a plurality of light sources arranged in a peripheral region on the base material and having a light distribution with strong directivity in a normal direction, and the light source. comprising a translucent cover covering the said translucent cover, the have a hollow protrusion facing the at least a portion of the light source projects away from the substrate, of at least the light-transmitting cover projection The transmittance is 80% or less, the protrusion is formed in a vertically long cross-sectional shape having a height in the normal direction of the base material with respect to the width in the radial direction, and the protrusion is the base material The distance from the highest point of the translucent cover to h, the protrusion cross section as a contour and the radial distance from the intersection of the base with the inner part of the light source to the light source, di, and the protrusion cross section as a contour The radial distance from the intersection of the substrate with the outer side of the light source to the light source is d0. When,
(H / di)> 1 or (h / d0)> 1
It is.

Claims (12)

扁平な基材と、
前記基材上の周辺領域に配置され法線方向への指向性の強い配光を有する複数の光源と、
前記光源を覆う透光カバーと、を備え、
前記透光カバーは、前記少なくとも一部の光源と対向し前記基材から離れる方向に突出する中空の突部を有する扁平型ランプ装置。 A flat substrate,
A plurality of light sources arranged in a peripheral region on the substrate and having a light distribution with a strong directivity in the normal direction;
A translucent cover that covers the light source,
The translucent cover is a flat lamp device having a hollow protrusion that faces the at least part of the light source and protrudes in a direction away from the base material. 少なくとも前記透光カバーの突部の透過率は、８０％以下である請求項１に記載の扁平型ランプ装置。   The flat type lamp device according to claim 1, wherein the transmissivity of at least the projection of the translucent cover is 80% or less. 前記突部は、径方向の幅に対して、基材の法線方向の高さが高い縦長の断面形状に形成されている請求項１又は２に記載の扁平型ランプ装置。   3. The flat lamp device according to claim 1, wherein the protrusion is formed in a vertically long cross-sectional shape in which a height in a normal direction of the base material is higher than a radial width. 前記透光カバーの突部は、前記基材から透光カバーの最高点までの距離をｈ、突部断面を輪郭と前記基材の前記光源より内側部分との交点から、前記光源までの径方向距離をｄｉ、前記突部断面を輪郭と前記基材の前記光源より外側部分との交点から、前記光源までの径方向距離をｄ０、とするとき、
（ｈ／ｄi）＞１ あるいは （ｈ／ｄ０）＞１
である請求項３に記載の扁平型ランプ装置。 The projecting portion of the translucent cover has a distance from the base material to the highest point of the translucent cover, h, a diameter of the cross section of the projecting portion from the intersection of the contour and the inner portion of the base material to the light source When the directional distance is di, the radial distance from the intersection of the contour of the protruding section and the outer portion of the base material from the light source to the light source is d0,
(H / di)> 1 or (h / d0)> 1
The flat lamp device according to claim 3. 前記光源の一部は前記基材上の周辺領域にサークル状に並んで配置され、前記透光カバーに突部は、前記基材の周辺領域と対向する環状に形成されている請求項１ないし４のいずれか１項に記載の扁平型ランプ装置。   A part of the light source is arranged in a circle in a peripheral region on the base material, and a protrusion is formed in an annular shape facing the peripheral region of the base material on the translucent cover. 5. The flat lamp device according to any one of 4 above. 前記光源は複数の点状光源であり、前記透光カバーは前記各光源のそれぞれを覆う縦長形状の突部を有する請求項１ないし５のいずれか１項に記載の扁平型ランプ装置。   The flat lamp device according to any one of claims 1 to 5, wherein the light source is a plurality of point light sources, and the translucent cover has a vertically long protrusion that covers each of the light sources. 前記突部は、楕円の断面形状を有する請求項１ないし６のいずれか１項に記載の扁平型ランプ装置。   The flat lamp device according to claim 1, wherein the protrusion has an elliptical cross-sectional shape. 前記突部は、矩形の断面形状を有する請求項１ないし６のいずれか１項に記載の扁平型ランプ装置。   The flat lamp device according to claim 1, wherein the protrusion has a rectangular cross-sectional shape. 前記突部の前記光源と対向する領域は、他の領域よりも厚く形成されている請求項８に記載の扁平型ランプ装置。   The flat lamp device according to claim 8, wherein a region of the protrusion facing the light source is formed to be thicker than other regions. 前記突部の前記光源と対向する領域に凹凸が形成されている請求項８に記載の扁平型ランプ装置。   The flat lamp device according to claim 8, wherein unevenness is formed in a region of the protrusion facing the light source. 前記光源の一部は前記基材の周辺領域にサークル状に並んで配置され、前記突起はサークル状に連なっている請求項１ないし６のいずれか１項に記載の扁平型ランプ装置。   The flat type lamp device according to any one of claims 1 to 6, wherein a part of the light source is arranged in a circle in a peripheral region of the base material, and the protrusions are connected in a circle. 前記光源は前記基材上に分散して配置され、前記突起は前記個々の光源を覆っている請求項１ないし６のいずれか１項に記載の扁平型ランプ装置。   The flat lamp device according to any one of claims 1 to 6, wherein the light sources are distributed on the base material, and the protrusions cover the individual light sources.
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