JPH06290872A - El element - Google Patents
El elementInfo
- Publication number
- JPH06290872A JPH06290872A JP5074072A JP7407293A JPH06290872A JP H06290872 A JPH06290872 A JP H06290872A JP 5074072 A JP5074072 A JP 5074072A JP 7407293 A JP7407293 A JP 7407293A JP H06290872 A JPH06290872 A JP H06290872A
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- light emission
- layer
- brightness
- layers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003086 colorant Substances 0.000 claims abstract description 17
- 239000010949 copper Substances 0.000 description 9
- 229910052802 copper Inorganic materials 0.000 description 8
- 229910052984 zinc sulfide Inorganic materials 0.000 description 8
- 235000019557 luminance Nutrition 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000005083 Zinc sulfide Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910052950 sphalerite Inorganic materials 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Landscapes
- Electroluminescent Light Sources (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、２色以上の発光色で発
光するＥＬ素子に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an EL device which emits light of two or more colors.
【０００２】[0002]
【従来の技術】従来より、発光色の異なる複数のＥＬ素
子を並設し、共通の１対の防湿封止部材により一体的に
封止することにより、複数の発光色で発光するＥＬ素子
が知られている（例えば、実開昭６３−２５４９５号公
報）。これは複数のＥＬ素子を内部に有しているので、
内部の各ＥＬ素子毎にその駆動源と駆動回路とを有し、
これにより各ＥＬ素子を発光させている。2. Description of the Related Art Conventionally, an EL element which emits light of a plurality of emission colors has been provided by arranging a plurality of EL elements of different emission colors side by side and integrally sealing them by a common pair of moisture-proof sealing members. It is known (for example, Japanese Utility Model Laid-Open No. 63-25495). Since this has multiple EL elements inside,
Each EL element inside has its drive source and drive circuit,
This causes each EL element to emit light.
【０００３】しかしこの様な構成の場合、複数のＥＬ素
子を並設するために、細かい発光セグメントとすること
が難しく、形状的にも制限されるものであった。However, in the case of such a structure, it is difficult to form a fine light emitting segment because a plurality of EL elements are arranged side by side, and the shape is also limited.
【０００４】そこで本願出願人は、先に、特願平３−３
４４９６４号において、透明電極と背面電極との間に介
在させた発光層を、発光色の異なる発光層を各色毎に分
けた複数のパターンに形成し、背面電極を誘電体層を介
して各発光層のパターン毎に対応するように分割して形
成したものを提案している。Therefore, the applicant of the present application has previously filed Japanese Patent Application No. 3-3.
No. 44964, a light emitting layer interposed between a transparent electrode and a back electrode is formed into a plurality of patterns in which light emitting layers having different light emitting colors are divided for each color, and the back electrode emits light through a dielectric layer. It is proposed that the pattern is divided and formed so as to correspond to each layer pattern.
【０００５】[0005]
【発明が解決しようとする課題】上記の本願出願人が先
に提案したものについて、発光層中の発光体をＺｎＳに
ＣｕとＭｎとを加えて発光色をオレンジとしたものと、
ＺｎＳにＣｕを加えて発光色をブルーグリーンとしたも
のと、ＺｎＳにＣｕとＭｎを加えたものにさらにＺｎＳ
にＣｕを加えたものを混合して発光色をホワイトとした
ものとを用いて多色発光のＥＬ素子を作成し、これを同
一の電源と駆動回路を用いて発光させ、発光色の輝度
（cd／ m2 ）と静電容量（ｎＦ）とを測定した。尚、駆
動条件は５０Ｖ×７００Ｈｚのインバータ駆動であり、
発光層の面積は５０ｍｍ×２５ｍｍとした。その結果得
られたデータを表１に示している。Regarding the above-mentioned proposal of the applicant of the present application, the light-emitting body in the light-emitting layer has an emission color of orange by adding Cu and Mn to ZnS,
ZnS with Cu added to make the emission color blue-green, and ZnS with Cu and Mn added to ZnS
A multicolor EL element was prepared by using a mixture of Cu and Cu with a luminescent color of white, and using the same power supply and drive circuit, the EL element was made to emit light, and the brightness of the luminescent color ( cd / m 2 ) and capacitance (nF) were measured. The driving condition is 50V x 700Hz inverter drive,
The area of the light emitting layer was 50 mm × 25 mm. The data obtained as a result are shown in Table 1.
【０００６】[0006]
【表１】 [Table 1]
【０００７】この表１から判るように、発光色が異なる
発光層を同一の電源と駆動回路を用いて発光させた場
合、それぞれの発光輝度が異なるので、見栄えの良い多
色発光表示が得られない。また発光輝度を同一にするた
めに電源と駆動回路を発光色が異なる発光層毎に別々に
用意すると、コストが上昇し好ましくない。As can be seen from Table 1, when the light emitting layers having different light emitting colors are made to emit light by using the same power source and drive circuit, the respective light emitting luminances are different, so that a good-looking multicolor light emitting display can be obtained. Absent. If a power supply and a drive circuit are separately provided for each light emitting layer having a different light emission color in order to make the light emission brightness the same, the cost increases, which is not preferable.
【０００８】そこで本発明の目的は、同一の電源と駆動
回路によって、ほぼ均一な輝度をもつ異なった発光色の
セグメント表示を可能にし、見栄えの良い多色表示を低
コストで実現することにある。Therefore, it is an object of the present invention to enable segment display of different emission colors having substantially uniform brightness with the same power supply and drive circuit, and to realize a good-looking multicolor display at low cost. .
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に、本発明では、透明電極と背面電極との間に発光層及
び誘電体層を介在させてなるＥＬ素子において、発光層
は、発光色の異なる発光層を各色毎に分けた複数のパタ
ーンに形成してあり、背面電極は、誘電体層を介して発
光層の各パターンに対応するように分割して形成してあ
り、発光層及び背面電極は、同一電源で全ての発光層が
実質的に同一輝度となるように、輝度の低い発光層程発
光面積を小さくしてある。In order to achieve the above object, in the present invention, in an EL element having a light emitting layer and a dielectric layer interposed between a transparent electrode and a back electrode, the light emitting layer is a light emitting layer. Light emitting layers of different colors are formed in a plurality of patterns divided for each color, and the back electrode is divided and formed corresponding to each pattern of the light emitting layers through the dielectric layer. Further, the light emitting layer of the lower electrode has a smaller light emitting area so that all the light emitting layers have substantially the same brightness with the same power source.
【００１０】[0010]
【作用】輝度の低い発光層程発光面積を小さくすると、
静電容量が小さくなり、回路出力が増加して輝度が大き
くなる。[Function] If the light emitting layer having a lower brightness has a smaller emission area,
The capacitance decreases, the circuit output increases, and the brightness increases.
【００１１】[0011]
【実施例】本発明の一実施例を、図１乃至図３を参照し
て説明する。まず透明電極である透明導電フィルム１上
に第１，第２，第３の発光層２ａ，２ｂ，２ｃを形成す
る。この発光層２ａ，２ｂ，２ｃについては、後で詳細
に説明する。次に発光層の上に絶縁層３を形成する。こ
の絶縁層３は、チタン酸バリウム粉と、予め溶剤に溶け
た高誘電バインダとからなるインクを、印刷し、乾燥し
て層を形成したものである。更にこの絶縁層３の上に、
上記の第１，第２，第３の発光層２ａ，２ｂ，２ｃに対
向する位置に第１，第２，第３の背面電極４ａ，４ｂ，
４ｃを形成する。この背面電極４ａ，４ｂ，４ｃは、カ
ーボン粉と溶剤に溶けた樹脂（アクリル系など）からな
る導電ペーストを、印刷し、乾燥して形成したものであ
る。次に、背面電極４ａ，４ｂ，４ｃの上に、吸湿性の
樹脂とバインダとからなる吸湿ペーストを、印刷し、乾
燥して吸湿層５を形成する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. First, the first, second and third light emitting layers 2a, 2b and 2c are formed on the transparent conductive film 1 which is a transparent electrode. The light emitting layers 2a, 2b and 2c will be described in detail later. Next, the insulating layer 3 is formed on the light emitting layer. The insulating layer 3 is formed by printing an ink composed of barium titanate powder and a high dielectric binder previously dissolved in a solvent and drying the ink to form a layer. Furthermore, on this insulating layer 3,
The first, second, and third back electrodes 4a, 4b, are formed at positions facing the first, second, and third light emitting layers 2a, 2b, 2c.
4c is formed. The back electrodes 4a, 4b, 4c are formed by printing and drying a conductive paste made of carbon powder and a resin (such as acrylic resin) dissolved in a solvent. Next, a hygroscopic paste composed of a hygroscopic resin and a binder is printed on the back electrodes 4a, 4b, 4c and dried to form the hygroscopic layer 5.
【００１２】最後に透明導電フィルム１と背面電極４
ａ，４ｂ，４ｃとにそれぞれ導通するようにリード電極
７，８ａ，８ｂ，８ｃを接続させ、三フッ化ポリ塩化エ
チレン等の防湿フィルム６，６で上下から挾み、その外
周部を熱圧着して封止してＥＬ素子を作成する。Finally, the transparent conductive film 1 and the back electrode 4
The lead electrodes 7, 8a, 8b, 8c are connected so as to be electrically connected to a, 4b, 4c respectively, and they are sandwiched from above and below with moisture-proof films 6 and 6 such as trifluoropolyethylene chloride, and their outer peripheral portions are thermocompression bonded. Then, the EL element is prepared by sealing.
【００１３】次に第１，第２，第３の発光層２ａ，２
ｂ，２ｃについて詳細に説明する。第１発光層２ａは、
硫化亜鉛に銅とマンガンとが含有された発光体と、予め
溶剤に溶けた高誘電バインダ（シアノエチル化セルロー
ス等）とからなるインクを、印刷し、乾燥して層を形成
したもので、オレンジ発光色を有する。第２発光層２ｂ
は、硫化亜鉛に銅とマンガンとが含有された発光体と、
硫化亜鉛に銅が含有された発光体とを混合した発光体を
用い、他は第１発光層２ａと同様で、ホワイト発光色を
有する。第３発光層２ｃは、硫化亜鉛に銅が含有された
発光体を用い、他は第１発光層２ａと同様で、ブルーグ
リーン発光色を有する。Next, the first, second and third light emitting layers 2a, 2
b and 2c will be described in detail. The first light emitting layer 2a is
Ink that consists of a phosphor containing zinc sulfide containing copper and manganese and a high-dielectric binder (such as cyanoethylated cellulose) dissolved in a solvent in advance is printed and dried to form a layer. Have a color. Second light emitting layer 2b
Is a luminous body containing copper and manganese in zinc sulfide,
A light-emitting body obtained by mixing a light-emitting body containing zinc sulfide with copper is used, and the other is the same as that of the first light-emitting layer 2a, and has a white emission color. The third light emitting layer 2c uses a light emitting body containing copper in zinc sulfide and is similar to the first light emitting layer 2a except that it has a blue-green emission color.
【００１４】これらの異なった発光色を有する第１，第
２，第３の発光層２ａ，２ｂ，２ｃは、発光面積を同一
とした場合には、表１で示したように、ブルーグリーン
は１７．４cd／ m2 ，ホワイトは１２．６cd／ m2 ，オ
レンジは９．３cd／ m2 の順で輝度が低くなる。そこで
全て発光層の輝度を均一にするために、本発明では、発
光面積が小さい（静電容量が小さい）程回路出力が増加
し、輝度が大きくなるという特性を利用し、輝度の低い
発光層程発光面積を小さくしている。When the light emitting areas of the first, second and third light emitting layers 2a, 2b and 2c having different emission colors are the same, as shown in Table 1, the blue green The brightness decreases in the order of 17.4 cd / m 2 , white is 12.6 cd / m 2 , and orange is 9.3 cd / m 2 . Therefore, in order to make the luminance of all the light emitting layers uniform, in the present invention, the characteristic that the circuit output increases and the luminance increases as the light emitting area is smaller (smaller capacitance) is used. The smaller the light emitting area is.
【００１５】回路出力の増加について、図４に示した駆
動回路を例として説明する。図４において、Ｃ１，Ｃ２
はコンデンサ、Ｒ１，Ｒ２は抵抗、Ｔｒはトランジス
タ、Ｔはトランス、Ｅは電源である。ＥＬ素子の静電容
量をＣとし、トランスＴのインダクタンスをＬとする
と、発振周波数ｆは、The increase of the circuit output will be described by taking the drive circuit shown in FIG. 4 as an example. In FIG. 4, C1, C2
Is a capacitor, R1 and R2 are resistors, Tr is a transistor, T is a transformer, and E is a power supply. When the capacitance of the EL element is C and the inductance of the transformer T is L, the oscillation frequency f is
【００１６】[0016]
【数１】 [Equation 1]
【００１７】で表わされる。すなわち、ＥＬ素子の発光
面積が小さくなり、静電容量Ｃが小さくなると、式よ
り周波数ｆは大きくなる。また負荷（ＥＬ素子）が無い
状態での出力電圧をＶL とし、回路内部抵抗をＲ0 ，Ｅ
Ｌ素子の内部抵抗をＲZ ，このときＥＬ素子にかかる電
圧をＶZ とすると、先ずＲZ は、It is represented by That is, when the light emitting area of the EL element is reduced and the capacitance C is reduced, the frequency f is increased from the equation. The output voltage without load (EL element) is VL, and the circuit internal resistance is R0, E
Let RZ be the internal resistance of the L element and VZ be the voltage applied to the EL element at this time.
【００１８】[0018]
【数２】 [Equation 2]
【００１９】で表わされ、上記と同様にＣが小さくなる
と、式よりＲZ は増加する。このときＶZ は、ＶZ ＝
ＶL ・ＲZ ／（Ｒ0 ＋ＲZ ）で表され、ＲZ が増加する
とＶZ も増加する。以上のように発光面積を小さくする
（静電容量Ｃを小さくする）ことにより、ＥＬ素子にか
かる電圧ＶZ ，周波数ｆが大きくなるので、輝度が上昇
する。## EQU3 ## As in the above case, when C decreases, RZ increases from the equation. At this time, VZ is VZ =
It is represented by VL.RZ / (R0 + RZ), and as RZ increases, VZ also increases. As described above, by decreasing the light emitting area (reducing the electrostatic capacitance C), the voltage VZ applied to the EL element and the frequency f are increased, so that the brightness is increased.
【００２０】次に、発光面積を小さくすることにより輝
度を均一にすることができることを説明するために、図
５に横軸を発光面積（cm2 ）とし、縦軸を輝度（cd／ m
2 ）とし、両者の関係のグラフを示している。ブルーグ
リーン，ホワイト，オレンジのいずれの発光層も、発光
面積が小さくなる程輝度が上昇している。そこで輝度を
均一にする一例として、ブルーグリーン：１４．５cm
2 ，ホワイト１１cm2 ，オレンジ８．５cm2 にすると、
輝度は２０cd／ m2 に均一になる。Next, in order to explain that the luminance can be made uniform by reducing the light emitting area, the horizontal axis represents the light emitting area (cm 2 ) and the vertical axis represents the luminance (cd / m in FIG. 5).
2 ) and the graph of the relationship between the two is shown. In each of the blue-green, white, and orange light-emitting layers, the brightness increases as the light-emitting area decreases. Therefore, as an example of making the brightness uniform, blue-green: 14.5 cm
2 , white 11 cm 2 , orange 8.5 cm 2 ,
The brightness becomes uniform at 20 cd / m 2 .
【００２１】図６は本発明のＥＬ素子の他の実施例を示
すもので、この例における発光層１２ａ，１２ｂ，１２
ｃは、同心リング状に形成してあり、中心部近傍にオレ
ンジ発光色の発光層１２ａが位置し、その外側にホワイ
ト発光色の発光層１２ｂが位置し、最外周にブルーグリ
ーン発光色の発光層１２ｃが位置している。上に説明し
たようにオレンジ発光色のものが最も輝度が低いので、
中心部近傍に位置させて発光面積を最も小さくし、ブル
ーグリーン発光色のものは最も輝度が高いので、最外周
に位置させて発光面積を最も大きくし、ホワイト発光色
のものを両者の中間に位置させたものである。このよう
な形状に構成することによっても、輝度をほぼ均一にで
きる。その他の構成は図１の実施例と実質的に同一であ
るので、同一の符号を付している。FIG. 6 shows another embodiment of the EL device of the present invention. In this example, the light emitting layers 12a, 12b, 12 are provided.
c is formed in a concentric ring shape, an orange light emitting layer 12a is located near the center, a white light emitting layer 12b is located outside the center, and a blue green light emitting layer is located at the outermost periphery. Layer 12c is located. As explained above, the orange light emission color has the lowest brightness, so
The light emitting area is minimized by locating it near the center, and the blue-green luminescent color has the highest brightness, so it is located at the outermost periphery and the luminescent area is maximized. It is located. Even with such a configuration, the brightness can be made substantially uniform. The other structure is substantially the same as that of the embodiment shown in FIG.
【００２２】尚、異なった発光色を有する発光層は、上
に説明したものに限られるものでなく、その他、異なっ
た色の螢光顔料を発光層に添加するものであっても良
い。The luminescent layers having different luminescent colors are not limited to those described above, and other fluorescent pigments of different colors may be added to the luminescent layers.
【００２３】[0023]
【発明の効果】以上に説明したように、本発明では、発
光色の異なる発光層の中で、輝度の低い発光層程発光面
積を小さくしてあるので、発光面積が小さい（静電容量
が小さい）程回路出力が増加し、輝度が大きくなること
から、同一電源で全ての発光層を実質的に同一輝度で発
光させることができ、見栄えの良い多色表示を低コスト
で実現することができる。発光色の異なる発光層毎に別
々の駆動源，駆動回路を用意することを要しないので、
コストの低減を達成できる。As described above, in the present invention, among the light emitting layers having different emission colors, the light emitting layer having a lower brightness has a smaller light emitting area, so that the light emitting area is smaller (capacitance is smaller). Since the circuit output increases and the brightness increases as the (smaller), all the light emitting layers can emit light with substantially the same brightness by the same power source, and a good-looking multicolor display can be realized at low cost. it can. Since it is not necessary to prepare a separate drive source and drive circuit for each light emitting layer that emits different colors of light,
A cost reduction can be achieved.
【図１】本発明の一実施例を示すもので、一方の防湿フ
ィルムを省略した状態の平面図である。FIG. 1 shows an embodiment of the present invention and is a plan view in which one moisture-proof film is omitted.
【図２】図１のＡ−Ａ線断面図である。FIG. 2 is a sectional view taken along the line AA of FIG.
【図３】他方の防湿フィルム及び吸湿層を省略した状態
の背面図である。FIG. 3 is a rear view in a state where the other moisture-proof film and the moisture absorption layer are omitted.
【図４】ＥＬ素子の駆動回路の一例を示す駆動回路図で
ある。FIG. 4 is a drive circuit diagram showing an example of a drive circuit of an EL element.
【図５】発光色の異なる発光層の発光面積と輝度との関
係を示す図である。FIG. 5 is a diagram showing a relationship between a light emitting area and a luminance of light emitting layers having different light emitting colors.
【図６】本発明の他の実施例を示すもので、一方の防湿
フィルムを省略した状態の平面図である。FIG. 6 shows another embodiment of the present invention, and is a plan view in which one moisture-proof film is omitted.
１ 透明電極 ２ａ，２ｂ，２ｃ 発光色の異なる発光層 １２ａ，１２ｂ，１２ｃ 発光色の異なる発光層 ３ 誘電体層（絶縁層） ４ 背面電極 1 Transparent Electrodes 2a, 2b, 2c Light Emitting Layers with Different Emission Colors 12a, 12b, 12c Light Emitting Layers with Different Emission Colors 3 Dielectric Layer (Insulating Layer) 4 Back Electrode
Claims (1)
誘電体層を介在させてなるＥＬ素子において、 上記発光層は、発光色の異なる発光層を各色毎に分けた
複数のパターンに形成してあり、 上記背面電極は、上記誘電体層を介して上記発光層の各
パターンに対応するように分割して形成してあり、 上記発光層及び上記背面電極は、同一電源で全ての発光
層が実質的に同一輝度となるように、輝度の低い発光層
程発光面積を小さくしてあることを特徴とするＥＬ素
子。1. An EL device having a light emitting layer and a dielectric layer interposed between a transparent electrode and a back electrode, wherein the light emitting layer has a plurality of patterns in which light emitting layers having different emission colors are divided for each color. The back electrode is divided and formed so as to correspond to each pattern of the light emitting layer via the dielectric layer, and the light emitting layer and the back electrode are all formed by the same power source. An EL device characterized in that the light emitting layer having a lower brightness has a smaller light emitting area so that the light emitting layers have substantially the same brightness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07407293A JP3452266B2 (en) | 1993-03-31 | 1993-03-31 | EL element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07407293A JP3452266B2 (en) | 1993-03-31 | 1993-03-31 | EL element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06290872A true JPH06290872A (en) | 1994-10-18 |
| JP3452266B2 JP3452266B2 (en) | 2003-09-29 |
Family
ID=13536616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07407293A Expired - Fee Related JP3452266B2 (en) | 1993-03-31 | 1993-03-31 | EL element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3452266B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007173520A (en) * | 2005-12-22 | 2007-07-05 | Matsushita Electric Works Ltd | Organic EL lighting panel and organic EL lighting device |
| WO2008059732A1 (en) * | 2006-11-13 | 2008-05-22 | Sony Corporation | Display device, method for driving electro-optical element, and electronic device |
| JP2008300367A (en) * | 1999-02-26 | 2008-12-11 | Sanyo Electric Co Ltd | Color organic EL display device |
| JP2013145705A (en) * | 2012-01-16 | 2013-07-25 | Tatsumo Kk | Display using inorganic el element |
-
1993
- 1993-03-31 JP JP07407293A patent/JP3452266B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008300367A (en) * | 1999-02-26 | 2008-12-11 | Sanyo Electric Co Ltd | Color organic EL display device |
| JP2007173520A (en) * | 2005-12-22 | 2007-07-05 | Matsushita Electric Works Ltd | Organic EL lighting panel and organic EL lighting device |
| WO2008059732A1 (en) * | 2006-11-13 | 2008-05-22 | Sony Corporation | Display device, method for driving electro-optical element, and electronic device |
| JP2008122647A (en) * | 2006-11-13 | 2008-05-29 | Sony Corp | Display device, driving method of electro-optical element, and electronic apparatus |
| US8237690B2 (en) | 2006-11-13 | 2012-08-07 | Sony Corporation | Display device, electro-optical element driving method and electronic equipment |
| US8553020B2 (en) | 2006-11-13 | 2013-10-08 | Sony Corporation | Display device, electro-optical element driving method and electronic equipment |
| US8743098B2 (en) | 2006-11-13 | 2014-06-03 | Sony Corporation | Display device, electro-optical element driving method and electronic equipment |
| US9070601B2 (en) | 2006-11-13 | 2015-06-30 | Sony Corporation | Display device, electro-optical element driving method and electronic equipment |
| US9224761B2 (en) | 2006-11-13 | 2015-12-29 | Joled Inc. | Display device, electro-optical element driving method and electronic equipment |
| JP2013145705A (en) * | 2012-01-16 | 2013-07-25 | Tatsumo Kk | Display using inorganic el element |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3452266B2 (en) | 2003-09-29 |
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