【発明の詳細な説明】 (イ)産業上の利用分野 本発明は、ワードプロセツサ或いはパーソナルコンピユ
ータ等における液晶デイスプレイ装置や液晶ＴＶ装置の
バツクライトとして好適な平面型蛍光灯に関する。The present invention relates to a flat fluorescent lamp suitable as a backlight for a liquid crystal display device or a liquid crystal TV device in a word processor, a personal computer or the like.
(ロ)従来の技術 液晶パネルは軽薄で消費電力が少ないという利点がある
ため、液晶ＴＶの他にパーソナルコンピユータ或いはワ
ードプロセツサ等のデイスプレイデバイスとして広く利
用されている。一方、液晶自身は非発光であるためバツ
クライトとして例えば実開昭５４−１１１９８５号公報
（９３Ｄ３１１）に記載の如き平面型蛍光灯を用いるこ
とが必要となる。(B) Conventional technology Since liquid crystal panels are advantageous in that they are light and thin and consume little power, they are widely used as display devices such as personal computers or word processors in addition to liquid crystal TVs. On the other hand, since the liquid crystal itself does not emit light, it is necessary to use a flat fluorescent lamp as described in Japanese Utility Model Publication No. 54-111985 (93D311).
また、上記液晶パネルは近年大型化が進み例えばＡ４サ
イズのものも使用されるようになって来ており、この様
な大型の液晶パネルに用いる平面型蛍光灯も大型化する
必要が生じてきた。しかしながら、ガラス容器を大型に
すると大気圧による爆縮を防止するために板厚の厚いガ
ラスを用いなければならず、軽量、薄型化の妨げとなっ
てしまう欠点があった。In addition, the liquid crystal panel has become larger in size in recent years and, for example, an A4 size one has come to be used, and it has become necessary to upsize a flat fluorescent lamp used for such a large liquid crystal panel. . However, if the glass container is made large, it is necessary to use thick glass in order to prevent the implosion due to the atmospheric pressure, and there is a drawback that it becomes difficult to reduce the weight and the thickness.
上記欠点を解消するために、本願出願人は先に特願昭６
１−５４１９４号にて、対向する上下一対の平板ガラス
間に補強ガラスを配設することにより耐圧を上げ、薄型
化を可能とした平面型蛍光灯を提案している。In order to solve the above-mentioned drawbacks, the applicant of the present invention previously filed Japanese Patent Application No.
Japanese Patent No. 1-54194 proposes a flat fluorescent lamp in which a reinforcing glass is provided between a pair of upper and lower flat glass plates which face each other to increase the withstand pressure and enable a reduction in thickness.
しかしながら、上記補強ガラスに比較的安価なソーダガ
ラス、鉛ガラス或いは硼珪酸ガラス等を用いた場合、放
電空間の放電によって水銀から発生する紫外線（２５３
７Å）を透過させることができない。従って、補強ガラ
スが対向する上平板ガラスの内面に塗布された蛍光膜は
発光しないため、この蛍光膜が光をしゃ断することにな
り、発光面上で補強ガラスが位置する部分の輝度が低下
し、輝度ムラが発生する。However, when relatively inexpensive soda glass, lead glass, borosilicate glass, or the like is used as the reinforcing glass, ultraviolet rays (253
7Å) cannot be transmitted. Therefore, since the fluorescent film coated on the inner surface of the upper flat glass facing the reinforcing glass does not emit light, this fluorescent film blocks light, and the brightness of the portion where the reinforcing glass is located on the light emitting surface is reduced. , Uneven brightness occurs.
(ハ)発明が解決しようとする問題点 本発明は上述の点に鑑み為されたものであり、補強ガラ
スを用いても輝度ムラが、発生せず均一な輝度が得られ
る平面型蛍光灯を提供するものである。(C) Problems to be solved by the present invention The present invention has been made in view of the above-mentioned points, and a flat fluorescent lamp in which uneven brightness is obtained even when a reinforcing glass is used and uniform brightness is obtained without occurrence It is provided.
(ニ)問題点を解決するための手段 本発明は、蛍光膜のうち補強ガラスが対接する部分を蛍
光塗料の無塗布部とすると共に、前記補強ガラスに半透
明なガラスを用いてなる。(D) Means for Solving the Problems In the present invention, the portion of the fluorescent film that is in contact with the reinforcing glass is a non-coated portion of the fluorescent paint, and the reinforcing glass is semitransparent glass.
(ホ)作用 上述の手段により補強ガラスの側面より入射した光は補
強ガラス内部で乱反射して無塗布部及び上平板ガラスを
通して外部へ放射される。(E) Action The light incident from the side surface of the reinforcing glass is diffusely reflected inside the reinforcing glass by the above-mentioned means, and is radiated to the outside through the uncoated portion and the upper flat glass.
(ヘ)実施例 以下、図面に従い本発明の一実施例を説明する。(F) Embodiment One embodiment of the present invention will be described below with reference to the drawings.
第１図は本実施例における平面型蛍光灯の分解斜視図、
第２図(イ)(ロ)(ハ)は夫々、同平面型蛍光灯の平面図、Ａ
−Ａ′断面図及びＢ−Ｂ′断面図である。FIG. 1 is an exploded perspective view of a flat fluorescent lamp according to this embodiment,
2 (a), (b) and (c) are plan views of the same planar fluorescent lamp, respectively.
It is a sectional view taken along the line A-A 'and a sectional view taken along the line BB'.
図中、(1)(2)はその内面に蛍光膜(3)(4)が夫々形成され
たＡ４サイズ（２７８mm×１９２mm）の上下平板ガラス
であり、前記蛍光膜は夫々、スリツト状の無塗布部(5)
(6)により３分割されている。また、上平板ガラス(1)の
上面は粗面加工されると共に下平板ガラス(2)の下面に
は無塗布部(6)(6)に対応して、この無塗布部よりは巾広
のアルミ箔よりなる反射膜(7)(7)が形成されている。
(8)は前記上下平板ガラス間を所定間隔に保持するロ字
状の枠ガラスであり、上下平板ガラスと共にガラス容器
を構成する。(9)(9)は断面コ字状の一対の放電々極であ
り、両側には端部での放電促進のための補助電極(9a)(9
a)…が夫々形成されると共に、前記無塗布部の位置の延
長上にコ字状の切欠き(9b)(9b)…が形成されている。(1
0)(10)…は前記補助電極に夫々スポツト溶接により接続
され外部へ突出する断面Ｌ字状のリード片であり、電気
的機能の外に前記放電々極を機械的に支持する機能をも
有する。(11)(11)は前記上下平板ガラス間の間隙に等し
い高さの角柱状の補強ガラスであり爆縮を防止する。ま
た、この補強ガラスは前記放電々極の切欠き(9b)(9b)…
にその端部が嵌合すると共に、その上下面は無塗布部
(5)(6)…に対向して接触する 尚、この補強ガラスはマルチフオームガラスと称される
多くの気泡を含んだ乳白色（半透明）のガラス材料によ
り形成されている。In the figure, (1) and (2) are upper and lower flat glass sheets of A4 size (278 mm × 192 mm) each having a fluorescent film (3) and (4) formed on the inner surface thereof, and each of the fluorescent films is a slit-shaped glass. Coater (5)
It is divided into 3 by (6). Further, the upper surface of the upper flat glass (1) is roughened, and the lower surface of the lower flat glass (2) corresponds to the uncoated portions (6) and (6), and is wider than this uncoated portion. Reflective films (7) and (7) made of aluminum foil are formed.
(8) is a rectangular frame glass that holds the upper and lower flat glass plates at a predetermined interval, and constitutes a glass container together with the upper and lower flat glass plates. (9) (9) is a pair of discharge poles with a U-shaped cross section, and auxiliary electrodes (9a) (9a) (9a) (9
are formed respectively, and U-shaped notches (9b) (9b) are formed on the extension of the position of the uncoated portion. (1
Reference numerals 0), (10) ... Lead pieces each having an L-shaped cross section and connected to the auxiliary electrodes by spot welding and projecting to the outside. The lead pieces also have a function of mechanically supporting the discharge pole in addition to an electrical function. Have. (11) (11) is a prismatic reinforcing glass having a height equal to the gap between the upper and lower flat glass and prevents implosion. In addition, this reinforced glass is provided with notches (9b) (9b) ...
The end part fits in and the upper and lower surfaces are uncoated parts.
(5) Opposing and contacting (6) ... The reinforcing glass is formed of a milky white (translucent) glass material containing many bubbles, which is called multi-form glass.
また、(12)は前記ガラス容器内部の空気を排気すると共
にアルゴンガス及び水銀を流入せしめた後、その先端が
熱融着により密閉されるチツプ管である。Further, (12) is a chip tube in which the inside of the glass container is exhausted and argon gas and mercury are made to flow in, and then the tip is sealed by heat fusion.
次に上記平面型蛍光灯の組立て手順について説明する。Next, a procedure for assembling the flat fluorescent lamp will be described.
まず、上平板ガラス(1)及び予めその外面の所定位置に
反射膜(7)が形成された下平板ガラス(2)の各内面に無塗
布部を残して蛍光膜(3)(4)をスクリーン印刷する。First, the upper flat glass (1) and the fluorescent film (3) (4) leaving an uncoated portion on each inner surface of the lower flat glass (2) on which the reflective film (7) is formed in advance at a predetermined position on the outer surface thereof. Screen print.
そして、下平板ガラス(2)上に一対の放電々極(9)(9)及
び第３図に示す如くこの放電々極の切欠き(9b)(9b)…に
嵌合する一対の補強ガラス(11)(11)を所定位置に載置す
る。尚、前記放電々極の両側の補助電極(9a)(9a)には予
めリード片(10)(10)…がスポツト溶接により固定されて
いる。Further, a pair of discharge electrodes (9) and (9) on the lower flat glass (2) and a pair of reinforcing glasses fitted to the notches (9b) (9b) of the discharge electrodes as shown in FIG. (11) Place (11) at a predetermined position. The lead pieces (10) (10) are fixed to the auxiliary electrodes (9a) (9a) on both sides of the discharge electrode by spot welding in advance.
次に、下平板ガラス(2)上に枠ガラス(8)、チツプ管(12)
及び上平板ガラス(1)をフリツトガラスと共に載置し、
熱融着により密閉されたガラス容器を形成する。Next, the frame glass (8) and the chip tube (12) on the lower flat glass (2).
And place the upper flat glass (1) together with the fritted glass,
A sealed glass container is formed by heat fusion.
最後にチツプ管(12)より容器内の空気を排気すると共に
アルゴンガス及び水銀を流入せしめた後、その先端を熱
融着して密閉する。Finally, the air in the container is evacuated through the chip tube (12), and argon gas and mercury are allowed to flow in, and the tip is heat-sealed to seal it.
上述の容器内における補強ガラス(11)(11)の機械的支持
は第３図に示す如く切欠き(9b)への嵌合のみで行なわれ
ており、上下平板ガラス(1)(2)にフリツトガラスにより
固定する必要がないためフリツトガラスのはみ出し等に
よる輝度ムラが発生することがない。Mechanical support of the reinforced glass (11) (11) in the above-mentioned container is performed only by fitting into the notch (9b) as shown in Fig. 3, and the upper and lower flat glass (1) (2) is Since it is not necessary to fix it with the fritted glass, uneven brightness due to protrusion of the fritted glass does not occur.
次に本実施例における補強ガラス(11)の拡大断面図を第
４図に示す。補強ガラス(11)の上下面は夫々、上下平板
ガラス(1)(2)の無塗布部(5)(6)に対向して位置してお
り、また、下平板ガラス(2)の無塗布部(6)に対応する位
置の下面には反射膜(7)が形成されている。従って、補
強ガラス(11)に入射した光は気泡により上下方向に乱反
射する。そして、上方へ向った光は無塗布部(5)及び上
平板ガラス(1)を透過して外方へ放射される。また、下
方へ反射した光は下方の無塗布部(6)及び下平板ガラス
(2)を透過し、反射膜(7)で反射して上方へ向かい、前述
同様に上平板ガラス(1)を透過して外方へ放射される。Next, FIG. 4 shows an enlarged cross-sectional view of the reinforced glass (11) in this example. The upper and lower surfaces of the reinforced glass (11) are located facing the uncoated portions (5) and (6) of the upper and lower flat glass (1) and (2), respectively, and the uncoated lower flat glass (2) is uncoated. A reflection film (7) is formed on the lower surface at a position corresponding to the portion (6). Therefore, the light incident on the reinforcing glass (11) is irregularly reflected in the vertical direction by the bubbles. Then, the light directed upward passes through the uncoated portion (5) and the upper flat glass (1) and is radiated outward. In addition, the light reflected downward is applied to the lower uncoated part (6) and the lower flat glass.
The light passes through (2), is reflected by the reflection film (7) and goes upward, and then passes through the upper flat glass (1) and is radiated outward as described above.
このように、補強ガラス(11)はマルチフオームガラスで
形成されているため入射光が内部で乱反射し、無塗布部
(5)(5)へ向かう光が多くなるため補強ガラス(11)使用に
よる輝度の低下或いは輝度ムラは極めて行なくなる。In this way, since the reinforcing glass (11) is made of multi-form glass, the incident light is diffusely reflected inside and the uncoated part
(5) Since a large amount of light goes to (5), the decrease in brightness or uneven brightness due to the use of the reinforcing glass (11) is extremely reduced.
更に、上平板ガラス(1)の上面が粗面加工されているの
で、上平板ガラス(1)面上での補強ガラス(11)部分と他
の部分との輝度に若干の差があってもその境界がぼやけ
るため、輝度ムラは更に抑えられる。Furthermore, since the upper surface of the upper flat glass (1) is roughened, even if there is a slight difference in the brightness between the reinforcing glass (11) and other portions on the upper flat glass (1) surface. Since the boundary is blurred, uneven brightness is further suppressed.
第５図に補強ガラスの他の実施例を示す。本実施例にお
ける補強ガラス(11)はその側面に蛍光膜(12)が形成され
ているため、補強ガラス(11)自体が発光し、無塗布部
(5)及び上平板ガラス(1)を透過してより多くの光が外部
へ放出される。FIG. 5 shows another embodiment of the reinforcing glass. Since the reinforcing glass (11) in this example has the fluorescent film (12) formed on its side surface, the reinforcing glass (11) itself emits light, and the uncoated portion
More light is emitted to the outside through (5) and the upper flat glass (1).
次に、第６図及び第７図に放電々極及び補強ガラスの他
の実施例を示す。第６図において、放電々極(9)にはプ
レス加工により凸型の嵌合部(9c)が形成されており、こ
の嵌合部(9c)に補強ガラス(11)の先端の段差部(11a)が
嵌入され位置固定される。尚、前記段差部(11a)の段差
は放電々極(9)の板厚分以上に形成されており、上下平
板ガラスに直接、嵌合部(9c)が接触しない様にしてい
る。Next, FIGS. 6 and 7 show another embodiment of the discharge cathode and the reinforced glass. In FIG. 6, a convex fitting part (9c) is formed on the discharge pole (9) by press working, and the fitting step (9c) has a stepped part (9c) at the tip of the reinforcing glass (11). 11a) is inserted and the position is fixed. The stepped portion (11a) is formed to have a thickness equal to or greater than the plate thickness of the discharge electrode (9) so that the fitting portion (9c) does not directly contact the upper and lower flat glass.
また、第７図において、放電々極(9)にはコ字状の第２
の補助電極(9d)が溶接されている。この第２補助電極(9
d)はその一対の突出片の間隔が補強ガラス(11)の厚さと
同一若しくは若干狭く形成されており、補強ガラス(11)
を弾性的に挟持する。Also, in FIG. 7, the discharge pole (9) has a U-shaped second
The auxiliary electrode (9d) is welded. This second auxiliary electrode (9
In d), the distance between the pair of protruding pieces is formed to be the same as or slightly smaller than the thickness of the reinforcing glass (11).
Is elastically clamped.
(ト)発明の効果 上述の如く本発明の依れば、補強ガラスの側面より入射
した光は蛍光膜により外部への放射がしゃ断されること
がないと共に、前記補強ガラスへの入射光は乱反射して
無塗布部へ向かう光量が増加するため、補強ガラス部分
の輝度低下が少なく発光面全体に亘って均一な輝度が得
られ、特に液晶ＴＶ、パーソナルコンピユータ或いはワ
ードプロセツサ等のデイスプレイデバイスのバツクライ
トとして有効である。(G) Effect of the Invention According to the present invention as described above, the light incident from the side surface of the reinforcing glass is not blocked by the fluorescent film to the outside, and the incident light to the reinforcing glass is diffusely reflected. As a result, the amount of light going to the non-coated portion increases, so that the luminance of the reinforcing glass portion does not decrease and uniform luminance can be obtained over the entire light emitting surface. Is effective as.
第１図は本発明の一実施例における平面型蛍光灯の分解
斜視図、第２図(イ)(ロ)(ハ)は夫々、平面型蛍光灯の平面
図、Ａ−Ａ′断面図及びＢ−Ｂ′断面図、第３図は補強
ガラスの取付構造を示す要部斜視図、第４図は補強ガラ
スの拡大断面図、第５図は補強ガラスの他の実施例を示
す拡大断面図、第６図及び第７図は夫々、補強ガラスの
取付構造の他の実施例を示す拡大断面図である。 (1)(2)……上下平板ガラス、(3)(4)……蛍光膜、(5)(6)
……無塗布部、(7)……反射膜、(8)……枠ガラス、(9)
(9)……放電々極、(11)(11)……補強ガラス。FIG. 1 is an exploded perspective view of a flat fluorescent lamp according to an embodiment of the present invention, and FIGS. 2 (a), (b), and (c) are plan views of the flat fluorescent lamp, AA 'cross-sectional view, and FIG. BB 'sectional view, FIG. 3 is a perspective view of an essential part showing a mounting structure of the reinforcing glass, FIG. 4 is an enlarged sectional view of the reinforcing glass, and FIG. 5 is an enlarged sectional view showing another embodiment of the reinforcing glass. 6 and 7 are enlarged cross-sectional views showing another embodiment of the reinforcing glass mounting structure, respectively. (1) (2) …… Upper and lower flat glass, (3) (4) …… Fluorescent film, (5) (6)
…… Uncoated area, (7) …… Reflective film, (8) …… Frame glass, (9)
(9) …… Discharge electrode, (11) (11) …… Reinforced glass.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 寺田 克美 大阪府守口市京阪本通２丁目18番地 三洋 電機株式会社内 (72)発明者 濱岸 五郎 大阪府守口市京阪本通２丁目18番地 三洋 電機株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Katsumi Terada Inventor Katsumi Terada 2-18 Keihan Hon-dori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. Electric Co., Ltd.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6661687AJPH0650623B2 (en) | 1987-03-20 | 1987-03-20 | Flat fluorescent lamp |
| CA000561637ACA1292768C (en) | 1987-03-20 | 1988-03-16 | Flat fluorescent lamp for liquid crystal display |
| US07/169,708US4920298A (en) | 1987-03-20 | 1988-03-18 | Flat fluorescent lamp for liquid crystal display |
| KR1019880002967AKR960014525B1 (en) | 1987-03-20 | 1988-03-19 | Flat fluorescent lamp for liquid crystal panel |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6661687AJPH0650623B2 (en) | 1987-03-20 | 1987-03-20 | Flat fluorescent lamp |
| Publication Number | Publication Date |
|---|---|
| JPS63232257A JPS63232257A (en) | 1988-09-28 |
| JPH0650623B2true JPH0650623B2 (en) | 1994-06-29 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6661687AExpired - LifetimeJPH0650623B2 (en) | 1987-03-20 | 1987-03-20 | Flat fluorescent lamp |
| Country | Link |
|---|---|
| JP (1) | JPH0650623B2 (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007049335A1 (en)* | 2005-10-25 | 2007-05-03 | Lecip Corporation | Flat discharge tube |
| Publication number | Publication date |
|---|---|
| JPS63232257A (en) | 1988-09-28 |
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