TW455832B - Drive circuit for electroluminescent display device - Google Patents
Drive circuit for electroluminescent display device Download PDFInfo
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- TW455832B TW455832B TW088106167A TW88106167A TW455832B TW 455832 B TW455832 B TW 455832B TW 088106167 A TW088106167 A TW 088106167A TW 88106167 A TW88106167 A TW 88106167A TW 455832 B TW455832 B TW 455832B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3216—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using a passive matrix
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0285—Improving the quality of display appearance using tables for spatial correction of display data
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2007—Display of intermediate tones
- G09G3/2011—Display of intermediate tones by amplitude modulation
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2007—Display of intermediate tones
- G09G3/2014—Display of intermediate tones by modulation of the duration of a single pulse during which the logic level remains constant
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of El Displays (AREA)
Abstract
Description
455832 五、發明說明（1) [發明的技術領域] 本發明係關於；至少其一方係由透明導電材料所成的 一對電極間，由電洞輸送層及發光層等的有機化合物所成 的有機層，經以所定之顯示圖案形狀層合形成的電發光顯 示裝置（以下簡稱為EL顯示裝置）之驅動電路者。 [習用技術] 有機電發光元件（以下簡稱為EL元件）係具有將含有螢 光性有機化合物的薄膜挾持於陰極及陽極間的構造，藉由 於該薄膜植入電子及電洞使之再結合以產生激子 (exci ton)，並利用該激子失活時之光放射（螢光•燐光）的 元件。 第4圖係表示使用有機EL元件之EL顯示裝置的概略構 成之侧剖面圖。第4圖所示的EL顯示裝置，係於具有絕緣性 及透光性的玻璃基板31上，形成有由iTOCIndium Tin Oxide銦鍚氧化物）所成的透明電極32。又於透明電極32 上，層合有以有機螢光體薄膜所成的有機層33。該有機層 33係於透明電極32上，以電洞輸送層33A、發光層33B依序 形成的2層構造，並形成作為發光部的畫素34。而於發光層 33B上，層合A1、Ag、Mg:Ag、Al:Li等金屬電極35。 於上述EL顯示裝置，係以透明電極32作為陽極，於兩電 極32、35間施加電壓，以使定電流流過。因此，可由各電極 32、35對有機層33植入電子及電洞。然後，由植入之電子 及電洞再結合以產生激子，藉由該激子失活時之光放射，作 所需的顯示。此時的發光，可經由透明電極32，得以由玻璃455832 V. Description of the Invention (1) [Technical Field of the Invention] The present invention relates to; at least one of the electrodes is formed between a pair of electrodes made of a transparent conductive material, and is formed by an organic compound such as a hole transport layer and a light emitting layer. The organic layer is a driving circuit of an electroluminescent display device (hereinafter referred to as an EL display device) formed by laminating in a predetermined display pattern shape. [Conventional Technology] An organic electroluminescent device (hereinafter referred to as an EL device) has a structure in which a thin film containing a fluorescent organic compound is held between a cathode and an anode. The thin film is implanted with electrons and holes to recombine it with An element that generates an exciton and uses the light emitted when the exciton is deactivated (fluorescent light or fluorescent light). Fig. 4 is a side cross-sectional view showing a schematic configuration of an EL display device using an organic EL element. The EL display device shown in Fig. 4 is formed on a glass substrate 31 having insulation and light transmission properties, and a transparent electrode 32 made of iTOC Indium Tin Oxide) is formed. An organic layer 33 made of an organic phosphor thin film is laminated on the transparent electrode 32. The organic layer 33 is a two-layer structure formed on the transparent electrode 32 with a hole transporting layer 33A and a light emitting layer 33B in this order, and a pixel 34 is formed as a light emitting portion. On the light-emitting layer 33B, metal electrodes 35 such as A1, Ag, Mg: Ag, and Al: Li are laminated. In the above-mentioned EL display device, a transparent electrode 32 is used as an anode, and a voltage is applied between the two electrodes 32 and 35 so that a constant current flows. Therefore, electrons and holes can be implanted into the organic layer 33 from each of the electrodes 32 and 35. Then, the implanted electrons and holes are recombined to generate an exciton, and the light emitted when the exciton is deactivated is used to make a desired display. The light emission at this time can be made of glass through the transparent electrode 32
C:\Program Files\Patent\310549.ptd 第 5 頁 45 583 2 五、發明說明（2) --- 基板31侧觀測之。 [發明所欲解決的問題] 於上述EL顯示裝置為獲得均勻的亮度，同時， 元件的經時間之變化起見，不作成電壓驅動之 _ ^ ^ ^ ^ ^ ^ V八，而以吟 吊流過一疋電流的方式予以驅動。 然而，於組合不同面積之畫素以進行顯示的 做定電流驅動則亮度將與發光面積成反比，而無法獲得均 勻亮度，以致有影響顯示品位的問題。又因畫素包含不门 的發光色、或畫素包含不同的發光效率等狀況時 與上述同樣問題。 ’ 本發明係有鑑於上述問題點而成，係為提供一種於不 同畫素面積、不同發光色、不同的發光效率等狀況中，仍 可保持顯示品位的EL顯示裝置之驅動電路為目的。 [解決問題的手段] 為達成上述目的，申請專利範圍第1項的發明係為能形 成作為發光部之不同面積的畫素6A、6P，於至少一方電極 為由透光性部件而成之2個電極2、7間層合形成有機層5， 而將另一方電極2作為陽極施加電壓以使上述2個電極2、7 間流通一定電流，以實行所期望的顯示之EL顯示裝置之驅 動電路11中，其特徵為： 具備收容有對應於上述畫素6A、6B個別面積的修正數 據之亮度修正數據記憶部1 4 B, 由上述亮度修正數據記憶部讀出對應於顯示數棣 之各畫素6A、6B的修正數據，並依據該讀出之修正數據使C: \ Program Files \ Patent \ 310549.ptd Page 5 45 583 2 V. Description of the invention (2) --- Observe it on the substrate 31 side. [Problems to be Solved by the Invention] In order to obtain uniform brightness in the above-mentioned EL display device, at the same time, in order to change the element over time, the voltage-driven _ ^ ^ ^ ^ ^ ^ ^ V eight is not used, but the dangling current Driven by a current. However, if the current is driven by combining pixels of different areas for display, the brightness will be inversely proportional to the light emitting area, and uniform brightness cannot be obtained, which may affect the display quality. The same problem occurs when the pixel contains a different luminous color or the pixel contains a different luminous efficiency. The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a driving circuit for an EL display device that can maintain display quality under conditions such as different pixel areas, different emission colors, and different emission efficiencies. [Means for Solving the Problem] In order to achieve the above-mentioned object, the first invention of the scope of patent application is to form pixels 6A and 6P with different areas as light-emitting portions, and at least one of the electrodes is made of a transparent member 2 The two electrodes 2 and 7 are laminated to form an organic layer 5, and the other electrode 2 is used as an anode to apply a voltage so that a certain current flows between the two electrodes 2 and 7 to implement a driving circuit of an EL display device with a desired display. 11 is characterized in that it includes a brightness correction data storage unit 1 4 B that stores correction data corresponding to the individual areas of the pixels 6A and 6B, and reads each picture corresponding to the display number from the brightness correction data storage unit. 6A, 6B correction data, and based on the read correction data
C:\Prograra Files\Patent\31〇549.ptd 第6頁 4 5 5 8 3 id 流通於上述電極2、7間之電流的通電時間為一定之下按 上述每一畫素6各別以可變方式控制上述電極2、7間之電 流值。 申請專利範圍第2項的發明係為能形成作為發光部之 不同面積的畫素6A、6B，於至少一方電極為由透光性部件 而成之2個電極2 '7間，層合形成有機層5，而將另一方電極 2為陽極施加電壓以使上述2個電極2、7間流過一定電流， 以實行所期望的顯示之EL顯示裝置之驅動電路11中，其特 徵為： ， 具備收容有對應於上述晝素6A、6B個別面積的修正數 據之亮度修正數據記憶部1 4 B， 由上述亮度修正數據記憶部14B讀出對應於顯示數據 之各畫素6A、6B的修正數據，並依據該讀出之修正數據使 分別流通於上述電極6A、6B的電流值為一定之下，按上述 每一畫素6A、6B，各別以可變方式控制流通於上述電極2、 7間之電流的通電時間。 如申請專利範圍第1或第2項的EL顯示裝置之驅動電路 11中，上述修正數據係除對應於晝素6Α、6β的面積之數據 外，亦可為對應於晝素6Α、6Β的發光色之數據，或對應於畫 素6 A、6Β的發光效率之數據，或由上述數據組合之數據。 [發明的實施形態] 第1圖為表示使用有關本發明的驅動電路的EL顯示裝 置之一構成例的平面圖。第2圖為第1圖的部分擴大侧剖面 圖，第3圖為表示有關本發明EL顯示裝置驅動電路實施形態C: \ Prograra Files \ Patent \ 31〇549.ptd Page 6 4 5 5 8 3 id The current of the current flowing between the electrodes 2 and 7 is below a certain value. The variable mode controls the current value between the electrodes 2 and 7. The invention of item 2 of the scope of patent application is to form pixels 6A and 6B with different areas as light-emitting parts, and at least one of the electrodes is formed of two electrodes 2'7 made of a light-transmitting member, and laminated to form an organic In the driving circuit 11 of the EL display device in which a voltage is applied to the other electrode 2 as an anode so that a certain current flows between the two electrodes 2 and 7 to implement a desired display, it is characterized by: The brightness correction data storage unit 14B containing correction data corresponding to the individual areas of the day pixels 6A and 6B is stored, and the brightness correction data storage unit 14B reads the correction data corresponding to the pixels 6A and 6B of the display data. And according to the read-out correction data, the current values respectively flowing through the electrodes 6A and 6B are kept below a certain value. According to each of the pixels 6A and 6B described above, each of the electrodes 6A and 6B is controlled to flow between the electrodes 2 and 7 in a variable manner. The current on time. For example, in the driving circuit 11 of the EL display device for which the scope of patent application is item 1 or 2, the above-mentioned correction data is not only data corresponding to the area of daylight 6A, 6β, but also light emission corresponding to daylight 6A, 6B Color data, or data corresponding to the luminous efficiency of pixels 6 A, 6B, or data combined from the above data. [Embodiment of the invention] Fig. 1 is a plan view showing a configuration example of an EL display device using a driving circuit according to the present invention. Fig. 2 is a partially enlarged side sectional view of Fig. 1, and Fig. 3 is a diagram showing an embodiment of a driving circuit of an EL display device according to the present invention;
ΙίϋΜ I1WM C:\Programnies\Patent\310549.ptd 第 7 頁 4 5/5*8-3 么 五、發明說明（4) 的方塊圖。 第1圖所示的EL顯示裝置，係以矩形狀的元件基板1為 基部°元件基板1係以具有絕緣性及透光性的玻璃基板構 成。於元件基板1表面，有以蝕刻或遮罩蒸鍍等方法，將I T〇 等透光性材料形成為厚度略均一的透明電極2。於第1圖中 的透明電極2，係以上列的3個透明電極2 A及下列的3個透明 電極2B，形成為2行3列的矩陣狀。而各透明電極2A、2B的 一部分則形成配線引至元件基板1外面，並接於後述之驅動 電路11的數據輸出電路^?。 如第1及第2圖所示，於透明電極2上按方形狀層合形成 有例如由環氧（epoxy)樹脂、玻釉（frit)玻璃或有機矽 (silica)化合物之燒結等所成的高電阻絕緣層3。且於該 絕緣層3具有挖成各透明電極形狀的貫穿部4並予以圖案 化0 絕緣層3可由印刷、遮罩蒸鍍、或蝕刻等方法形成為 略均勻的厚度《具體而言；除以蝕刻法將Si N或Si 〇2掘挖成 所期望之圖案形狀外，可將熔合玻璃或有機矽化合物印刷 成所期望之圖案形狀後燒成，或將耐熱性感光樹脂利用微 影（photol it hography)技術予以圖案化（patterning)為所 期望之圖案形狀，以形成絕緣層3。 第2圖所示，於透明電極2上，按能填埋絕緣層3的貫穿 部4之方式，層合形成有機層5。第2圖所示之有機層5係由 例如以雙胺（diamine)等有機化合物所成的電洞輸送層 與由有機化合物所成之發光層5B之2層構成，且以電网輪送ΙίϋΜ I1WM C: \ Programnies \ Patent \ 310549.ptd Page 7 4 5/5 * 8-3 What is the block diagram of the description of the invention (4). The EL display device shown in Fig. 1 uses a rectangular element substrate 1 as a base. The element substrate 1 is composed of a glass substrate having insulation and light transmission properties. On the surface of the element substrate 1, there is a method such as etching or mask vapor deposition to form a light-transmitting material such as I T0 into a transparent electrode 2 having a uniform thickness. The transparent electrodes 2 in Fig. 1 are formed of three transparent electrodes 2 A in the upper row and three transparent electrodes 2B in the lower row, and are formed in a matrix of two rows and three columns. A part of each of the transparent electrodes 2A and 2B forms a wiring which is led out of the element substrate 1 and is connected to a data output circuit of a driving circuit 11 described later. As shown in FIGS. 1 and 2, the transparent electrode 2 is laminated in a square shape to form, for example, an epoxy resin, glass frit, or a sintered silicone compound. High resistance insulation layer 3. In addition, the insulating layer 3 has a through portion 4 that is cut into the shape of each transparent electrode and is patterned. The insulating layer 3 can be formed to a slightly uniform thickness by printing, mask evaporation, or etching, etc. (specifically; divided by In addition to etching Si N or Si 〇2 into a desired pattern shape, fused glass or an organosilicon compound can be printed into a desired pattern shape and fired, or a heat-resistant sexy light resin can be photolithographically (photol it (hography) technology is patterned into a desired pattern shape to form the insulating layer 3. As shown in Fig. 2, an organic layer 5 is laminated on the transparent electrode 2 so as to bury the penetration portion 4 of the insulating layer 3. The organic layer 5 shown in FIG. 2 is composed of two layers of a hole transporting layer made of an organic compound such as diamine and a light emitting layer 5B made of an organic compound, and is rotated by a power grid.
C:\ProgramFiles\Patent\310549.ptd 第 8 頁 4b 583 2 五、發明說明（5) 層5A、發光層5B的順序予以層合而成。 又，經填埋絕緣層3之貫穿部4的有機層5部分形成將成 為發光部的畫素6。於第1圖的例示中，上列3個畫素6A係形 成為邊長a的正方形形狀。下列的3個畫素6B則形成為具有 2倍上列畫素6A面積的長方形形狀《然後，由於有機層5之 發光，可由元件基板1側觀察依畫素6形狀的顯示。 發光層5B之發光材料而言，如使發光層5B本身發光時， 可用如鋁喹咐（aluminum quinoline)或二苯乙烯基伸芳基 (distyry 1 ary lene)系化合物等。若須於發光層5β摻雜其 他微量發光材料（摻質（dopant))發光時，該摻質可用嗤口丫 酮（quinacridone)或雷射用色素等。 如第1圖所示，發光層5B上，以覆蓋各列的畫素6A 的方式層合形成有金屬電極7(7Α、7Β)。該金屬電極7係由 Al、Ag、Mg:Ag、Al:Li等，以蝕刻或遮罩蒸鍍等方法形成 為厚度略均勻者。該各金屬電極7A、7B係連結於後述之奥 動電路11之掃描輸出電路15於元件基板1的外周部分、在 儘量脫去水分的不活性氣體（例如：乾燥氮氣）或乾燥空氣 中，以接着劑固貼封貼用基板9作為封貼部件。藉此，可保 護兩電極2、7及有機層5，同時亦可實現高精細的有機EL顯 示裝置。 做為上述EL顯示裝置的其他構成，亦可將透明電極2與 金屬電極7予以反轉的構造。此時，元件基板1因不一定需、 要具有透光性之故，可以具絕緣性的玻璃基板構成之。而 電極2、7而言，至少將一方電極以透光性部件形成即可。 ΐ^ΗΠ^ΗΓ C：\Program Files\Patent\310549.ptd 第 9 頁一" ' '— 455832 五、發明說明（6) 如上述構成的EL顯示裝置，得以一方電極（例如為透明 電極）做為陽極以施加電壓，並使各透明電極2與金屬電極7 間流通一定電流，則可進行所期望的顯示。 以一定電流驅動上述EL顯示裝置的驅動電路η具備： 時序訊號產生電路12;數據控制電路13;由顯示數據記憶部 1 4Α及亮度修正數據記憶部丨4Β而成之記憶部丨4 ;掃描輸出 電路15以及演算控制電路16及數據輪出電路17以構成之。 時序訊號產生電路1 2係以列單位順序掃描金屬電極7, 並為能對各透明電極2按同步方式輸入數據訊號以進行所 期望的顯示，分別對數據控制電路13、記憶部14、掃描輪 出電路15以及演算控制電路16輸出所定的時序訊號。 數據控制電路13係將由外部依序輸入的顯示數據（於 第1圖的構成中，係為顯示如「Τ」、「〖」、「L」等英文 于的數據）依來自時序訊號產生電路12之時序訊號按時系 列方式取入以記憶於顯示數據記憶部14Α。 於亮度修正數據記憶部14Β中，以表格方式收容有對應 各畫素6面積之亮度修正數據。詳言之；予先設定施加於所 定畫素面積的電壓準位做為f基準數據』，再將根據該基 準數據以表格方式收容有依對應各畫素6的面積之電壓準 位的修正數據。 ^ 或者，將應施加於所定面積晝素的電壓之脈波寬度設 足為f基準數據』，再將根據該基準數據以表格方式收容 有依對應各畫素6面積之電壓準位的修正數據。 掃描輸出電路15係依來自時序訊號產生電路12的時序C: \ ProgramFiles \ Patent \ 310549.ptd Page 8 4b 583 2 V. Description of the invention (5) Layer 5A and light-emitting layer 5B are laminated in this order. Furthermore, a portion of the organic layer 5 through which the penetration portion 4 of the insulating layer 3 is buried forms a pixel 6 to be a light emitting portion. In the example shown in Fig. 1, the three pixels 6A in the above series have a square shape with a side length a. The following three pixels 6B are formed in a rectangular shape having twice the area of the above-mentioned pixels 6A. Then, since the organic layer 5 emits light, the display according to the shape of the pixels 6 can be viewed from the element substrate 1 side. For the light-emitting material of the light-emitting layer 5B, for example, when the light-emitting layer 5B is made to emit light, an aluminum quinoline or a distyrylarylene-based compound can be used. When light emitting layer 5β is doped with other light emitting materials (dopant), the dopant can be quinacridone or laser pigment. As shown in FIG. 1, metal electrodes 7 (7A, 7B) are formed on the light-emitting layer 5B so as to cover the pixels 6A of each column. The metal electrode 7 is made of Al, Ag, Mg: Ag, Al: Li, or the like, and is formed to have a slightly uniform thickness by a method such as etching or mask evaporation. The metal electrodes 7A and 7B are connected to the scan output circuit 15 of the Olympic circuit 11 described later on the outer peripheral portion of the element substrate 1 and in an inert gas (for example, dry nitrogen) or dry air to remove moisture as much as possible. Then, the sealing substrate 9 is fixedly adhered as a sealing member. Thereby, the two electrodes 2, 7 and the organic layer 5 can be protected, and at the same time, a high-definition organic EL display device can be realized. As another structure of the EL display device described above, the transparent electrode 2 and the metal electrode 7 may be inverted. In this case, since the element substrate 1 is not necessarily required and has light transmission properties, it can be made of an insulating glass substrate. For the electrodes 2 and 7, at least one of the electrodes may be formed of a translucent member. ΐ ^ ΗΠ ^ ΗΓ C: \ Program Files \ Patent \ 310549.ptd Page 9 I " '' — 455832 V. Description of the invention (6) The EL display device configured as above can have one electrode (for example, a transparent electrode) As an anode, a desired display can be performed by applying a voltage and allowing a certain current to flow between each transparent electrode 2 and the metal electrode 7. A driving circuit η that drives the EL display device with a certain current includes: a timing signal generating circuit 12; a data control circuit 13; a memory section 4 formed by a display data storage section 14A and a brightness correction data storage section 4B; and a scan output The circuit 15 and the calculation control circuit 16 and the data turn-out circuit 17 are configured. The sequential signal generation circuit 12 scans the metal electrodes 7 in sequence in a column unit, and in order to input the data signals to the transparent electrodes 2 in a synchronous manner to perform the desired display, the data control circuit 13, the memory section 14, and the scanning wheel are respectively The output circuit 15 and the calculation control circuit 16 output predetermined timing signals. The data control circuit 13 generates display data sequentially input from the outside (in the structure of FIG. 1, it displays data such as “T”, “〖”, “L”, etc.) in English from the timing signal generating circuit 12 The time series signals are retrieved in a time series manner and stored in the display data storage unit 14A. In the brightness correction data storage unit 14B, brightness correction data corresponding to the area of each pixel 6 is stored in a table format. In detail; the voltage level applied to the predetermined pixel area is set as f reference data ", and the correction data corresponding to the voltage level of the area corresponding to each pixel 6 is stored in a table form according to the reference data. . ^ Alternatively, set the pulse width of the voltage that should be applied to a given area of daytime to be f reference data ", and according to the reference data, the correction data corresponding to the voltage level of the 6 area of each pixel is contained in a table format . The scan output circuit 15 is based on the timing from the timing signal generating circuit 12.
455832 五、發明說明（7) 訊號，按列單位將EL顯示裝置之金屬電極7A、7B進行依序 選擇掃描。在第1囷的例，係按上列3個金屬電極7A、下列3 個金屬電極3 B的順序進行選擇掃描。 演算控制電路16係將依來自時序訊號產生電路12的時 序號，由顯示數據記憶部14A讀出之顯示數據所對應的各畫 素6的修正數據由亮度修正數據記憶部14B讀出，以輸出於 數據輸出電路17。 在此，若於亮度修正數據記憶部14B採用收容依電壓準 位之修正數據的構成時，由於所讀出之修正數據，數據輸出 電路17的驅動電路的輸入電壓位準將成為可變，而對應於 各畫素6的面積，在各透明電極2及金屬電極7間流通的輸出 電流即成為可變。此時，通電時間係在一定值，而若例如將 使畫素6A發光時輸入之修正數據的電壓準位做為基準數 據，並將當時的輸出電流設為5mA/cm2，則為使畫素6A之2倍 面積的畫素6B發光時，於數據輸出電路17將輸入基準數據2 倍準位之電壓，該輸出電流將成為1〇!!^/〇1112。 相對地，若於亮度修正數據記憶部14B採用收容依脈波 寬度之修正數據的構成時，由於所讀出之修正數據，數據輸 出電路17的驅動電路的輸入電壓的脈波寬度將成為可變， 而對應於各畫素6的面積，在透明電極2與金屬電極7間流通 的輸出電流之通電時間即成為可變。若例如將使晝素6A發 光時輸入之修正數據的脈波寬度做為基準數據並將當時 的輸出電流設為5aiA/cm2，則為使畫素6A之2倍面積的畫素 6B發光時，於數據輸出電路17將輸入基準數據2倍脈波寬度455832 V. Description of the invention (7) The signal is to sequentially select and scan the metal electrodes 7A and 7B of the EL display device in units of columns. In the first example, the selective scanning is performed in the order of the three metal electrodes 7A above and the three metal electrodes 3 B below. The calculation control circuit 16 reads the correction data of each pixel 6 corresponding to the display data read by the display data storage unit 14A according to the time serial number from the timing signal generation circuit 12 from the brightness correction data storage unit 14B to output于 数据 出 电路 17。 Data output circuit 17. Here, if the brightness correction data storage unit 14B adopts a configuration that accommodates correction data according to the voltage level, the input voltage level of the drive circuit of the data output circuit 17 will be variable due to the correction data read out, and correspond accordingly. In the area of each pixel 6, the output current flowing between each transparent electrode 2 and the metal electrode 7 becomes variable. At this time, the power-on time is a certain value, and if, for example, the voltage level of the correction data input when the pixel 6A is illuminated is used as reference data, and the current output current is set to 5 mA / cm2, the pixel is When a pixel 6B with a double area of 6A emits light, the data output circuit 17 will input a voltage of 2 times the level of the reference data, and the output current will become 1 !!!! ^ / 〇1112. On the other hand, if the brightness correction data storage unit 14B adopts a configuration that stores correction data according to the pulse width, the pulse width of the input voltage of the drive circuit of the data output circuit 17 will be variable due to the read correction data. In accordance with the area of each pixel 6, the energization time of the output current flowing between the transparent electrode 2 and the metal electrode 7 becomes variable. For example, if the pulse wave width of the correction data input when the daytime element 6A emits light is used as reference data and the output current at that time is set to 5aiA / cm2, when the pixel 6B having a double area of the pixel 6A is illuminated, The data output circuit 17 doubles the input reference data to the pulse width
C:\Program Files\Patent\310549.ptd 第 11 頁 4 5 583 2 五、發明說明（8) - 之電麼，該輸出電流將成為10mA/cm2。 數據輸出電路係同步於掃描輪出電路15，以輪出使 各畫素6on/off的數據訊號。詳言之，數據輸出電路17係由 具備與透明電極2相同個數的定電流驅動電晶體之驅動電 路構成之。再者，數據輸出電路17,係如上述按能得對應 於來自演算控制電路16的修正數據之輪出電流之方式控制 輸入電壓，以使對應於面積的一定電流將流通各透明電極2 與金屬電極7間。 如上述’依本實施形態的EL顯示裝置即使由不同面積 的畫素6形成發光部，仍可使各畫素6的電流密度之平均值 為相同而使各畫素6的亮度為均勻並保持海+沾 再者，上述之實施形態係以有機層5為由電洞^輸送層5Α 及發光層5Β的2層構造所成的例示說明，惟該有機層5可由 發光層與電荷輸送層（電洞輸送層、電洞植入•輸送層、 電子植入層、電子植入•輸送層等）的配合構成之。'具體 而言有；僅為發光層1層、發光層與電洞輸送層的2層、'發 光層與電子植入層的2層、電洞輸送層及發光層與電子植 入層的3層等的構成方式》 ' 再者，做為電子植入唐，為使電子植入容易，可使用如. Li、Na、Mg、Ca等功函數（work function)較小的單體金’ 屬材料，或使用如Al:Li、Mg:In、Mg:Ag等功函數較小的合 金0 於EL顯示裝置的畫素6圖樣係不限定於圖中所示者^ 形狀、面積、個數可按照其顯示形態任意形成之。 ’、C: \ Program Files \ Patent \ 310549.ptd Page 11 4 5 583 2 V. Description of the invention (8)-Electricity, the output current will be 10mA / cm2. The data output circuit is synchronized with the scan-out circuit 15 to rotate out the data signal that turns each pixel on / off. Specifically, the data output circuit 17 is constituted by a driving circuit including constant current driving transistors having the same number as the transparent electrodes 2. Furthermore, the data output circuit 17 controls the input voltage in such a manner as to obtain a round current corresponding to the correction data from the calculation control circuit 16 so that a certain current corresponding to the area will flow through the transparent electrodes 2 and the metal 7 electrodes. As described above, even if the EL display device according to this embodiment forms the light emitting portion from the pixels 6 of different areas, the average value of the current density of each pixel 6 can be the same, and the brightness of each pixel 6 can be uniform and maintained. In addition, the above-mentioned embodiment uses the organic layer 5 as an example of the two-layer structure of the hole transport layer 5A and the light-emitting layer 5B, but the organic layer 5 can be composed of a light-emitting layer and a charge-transport layer ( Hole transport layer, hole implantation • transportation layer, electron implantation layer, electron implantation • transportation layer, etc.). 'Specifically there is; only one light emitting layer, two light emitting layers and hole transport layers,' two light emitting layers and electron implant layers, three hole transport layers, and light emitting layers and electron implant layers Structure of layers, etc. "" Furthermore, as an electron implantation don, in order to make the electron implantation easier, a single metal with a smaller work function such as Li, Na, Mg, Ca can be used. " Materials, or alloys with smaller work functions such as Al: Li, Mg: In, Mg: Ag, etc. 0 Pixel 6 pattern system of EL display device is not limited to those shown in the figure ^ Shape, area and number can be It is arbitrarily formed according to its display form. ’,
C:\Program Files\Patent\310549.ptd 455832 五、發明說明（9) 上述實施形態中，係以具備不同面積的2種畫素6Α、6β 為例說明EL顯示裝置者，惟在包含不同發光色的畫素不 同發光效率的畫素的EL顯示裝置時仍可獲得與上述相同 之效果。此時，於亮度修正數據記憶部UB中按每畫素6以 表格方式收容各畫素6的發光色或每種發光效率的亮度修 正數據。 詳言之，於亮度修正數據記憶部14β中應施加於畫素6 各種發光色或每一發光效率的準位或脈波寬度的電壓將作 為修正數據收容之。然後，如上述之使不同面積的畫素 6Α、6Β發光時一樣，按能使成為對應於各畫素6必要亮度之 電流密度之方式，藉由對應於顯示數據之修正數據控制數 據輸出電路17的輸出。由此，在各透明電極2斑 間將供應對應於必要亮度的一定電流。 μ 又於亮度修正數據記憶部14Β中，亦可將應施加於上述 畫素6的各面積、發光色、發光效率之電壓位準或脈波寬 度做為修正數據按各畫素以表格方式予以收容再藉由對 應於顯不數據之修正數據控制數據輸出電路17的輸出。 可將對應於畫素6的面積、發光色、發光效率的組合之 壓位準或脈波寬度的數據做為修正數據。 [發明的效果] 由以上說明可知，依本發明可獲得即使畫素的面積、 發光色、發光效率不同，仍可使各畫素電流密度之平均 相同以使各畫素的亮度為均勻，並保持顯示品位的效 [圖面的簡單說明]C: \ Program Files \ Patent \ 310549.ptd 455832 V. Description of the invention (9) In the above embodiment, two types of pixels 6A and 6β with different areas are used as examples to describe the EL display device, but it includes different light emission. In the EL display device with pixels having different pixels having different luminous efficiency, the same effects as described above can be obtained. At this time, the luminance correction data storage unit UB stores the luminance correction data of each pixel 6 or each light emission efficiency in a table format for each pixel 6. In detail, the voltages to be applied to the brightness correction data storage unit 14β to the various emission colors of pixel 6 or the level or pulse width of each emission efficiency are stored as correction data. Then, as described above, when the pixels 6A and 6B of different areas are illuminated, the data output circuit 17 is controlled by the correction data corresponding to the display data in such a manner that the current density corresponding to the necessary brightness of each pixel 6 is achieved. Output. As a result, a certain current corresponding to the necessary brightness will be supplied between the spots of the transparent electrodes 2. μ In the brightness correction data storage section 14B, voltage levels or pulse widths that should be applied to each area, luminous color, and luminous efficiency of the above-mentioned pixel 6 can also be used as correction data in a tabular manner for each pixel. The containment then controls the output of the data output circuit 17 by the correction data corresponding to the display data. The data corresponding to the pressure level or the pulse width of the combination of the area, luminous color, and luminous efficiency of the pixel 6 can be used as the correction data. [Effects of the Invention] As can be seen from the above description, according to the present invention, even if the area, luminous color, and luminous efficiency of pixels are different, the average current density of each pixel can be made the same to make the brightness of each pixel uniform. The effect of maintaining the display quality [simple description of the drawing]
45 583 2 五、發明說明（ίο) 第1圖為表不採用本發明驅動電路之EL顯示裝置一構 成例的平面圖。 第2圖為第1圖的部份擴大側剖面圖。 第3圖為表示本發明EL顯示裝置之驅動電路的實施形 態方塊圖。 第4圖為表示使用有機EL元袢之EL顯示裝置概略構成 的側剖面圖。 [符號的簡單說明] 1 元件基板 2 透明電極 3 絕緣層 4 貫穿部 5 有機層 6 畫素 7 金屬電極 8 EL顯示裝置 11 驅動電路 12 時序訊號產生電路 13 數據控制電路 14 記憶部 14A 顯示數據記憶部 14B 亮度修正數據記憶部 15 掃描輸出電路 16 演算控制電路 17 數據輸出電路 31 玻璃基板 32 透明電極 33 有機層 33A 電洞輸送層 33B 發光層 34 畫素 35 金屬電極45 583 2 V. Description of the Invention (1) Figure 1 is a plan view showing an example of the structure of an EL display device not employing the driving circuit of the present invention. Fig. 2 is a partially enlarged side sectional view of Fig. 1. Fig. 3 is a block diagram showing an embodiment of a driving circuit of the EL display device of the present invention. Fig. 4 is a side sectional view showing a schematic configuration of an EL display device using an organic EL element. [Simplified explanation of symbols] 1 element substrate 2 transparent electrode 3 insulating layer 4 penetrating portion 5 organic layer 6 pixel 7 metal electrode 8 EL display device 11 driving circuit 12 timing signal generating circuit 13 data control circuit 14 memory portion 14A display data memory Section 14B Brightness correction data storage section 15 Scan output circuit 16 Calculation control circuit 17 Data output circuit 31 Glass substrate 32 Transparent electrode 33 Organic layer 33A Hole transport layer 33B Light-emitting layer 34 Pixel 35 Metal electrode
C:\ProgramFiles\Patent\3l0549.ptd 第 U 頁C: \ ProgramFiles \ Patent \ 3l0549.ptd page U
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Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10130428A JPH11327506A (en) | 1998-05-13 | 1998-05-13 | Driving circuit for el display device |
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| TW455832B true TW455832B (en) | 2001-09-21 |
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| TW088106167A TW455832B (en) | 1998-05-13 | 1999-04-17 | Drive circuit for electroluminescent display device |
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| JP (1) | JPH11327506A (en) |
| KR (1) | KR19990088200A (en) |
| GB (1) | GB2337354A (en) |
| TW (1) | TW455832B (en) |
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| JP2000214825A (en) * | 1999-01-20 | 2000-08-04 | Nec Corp | Backlight display device and method |
| JP4984341B2 (en) * | 1999-08-04 | 2012-07-25 | 株式会社デンソー | Display device |
| JP4780815B2 (en) * | 1999-08-26 | 2011-09-28 | 三洋電機株式会社 | Driving method of electroluminescence display device |
| JP3758930B2 (en) | 2000-03-17 | 2006-03-22 | 三星エスディアイ株式会社 | Image display apparatus and driving method thereof |
| GB2360870A (en) * | 2000-03-31 | 2001-10-03 | Seiko Epson Corp | Driver circuit for organic electroluminescent device |
| CN100511370C (en) | 2000-07-07 | 2009-07-08 | 精工爱普生株式会社 | Current sampling circuit for organic electroluminescent display |
| KR100672625B1 (en) * | 2000-12-23 | 2007-01-23 | 엘지.필립스 엘시디 주식회사 | Organic Electroluminescence Device and Driving Method for the same |
| WO2002091341A2 (en) * | 2001-05-09 | 2002-11-14 | Clare Micronix Integrated Systems, Inc. | Apparatus and method of periodic voltage sensing for control of precharging of a pixel |
| US7079131B2 (en) | 2001-05-09 | 2006-07-18 | Clare Micronix Integrated Systems, Inc. | Apparatus for periodic element voltage sensing to control precharge |
| US7079130B2 (en) | 2001-05-09 | 2006-07-18 | Clare Micronix Integrated Systems, Inc. | Method for periodic element voltage sensing to control precharge |
| US7088052B2 (en) * | 2001-09-07 | 2006-08-08 | Semiconductor Energy Laboratory Co., Ltd. | Light emitting device and method of driving the same |
| US7071635B2 (en) * | 2001-09-26 | 2006-07-04 | Sanyo Electric Co., Ltd. | Planar display apparatus |
| SG120889A1 (en) * | 2001-09-28 | 2006-04-26 | Semiconductor Energy Lab | A light emitting device and electronic apparatus using the same |
| SG120888A1 (en) * | 2001-09-28 | 2006-04-26 | Semiconductor Energy Lab | A light emitting device and electronic apparatus using the same |
| JP2003122309A (en) * | 2001-10-03 | 2003-04-25 | Koninkl Philips Electronics Nv | Display device |
| WO2003034385A2 (en) * | 2001-10-19 | 2003-04-24 | Clare Micronix Integrated Systems, Inc. | System and method for illumination timing compensation in response to row resistance |
| US6847171B2 (en) | 2001-12-21 | 2005-01-25 | Seiko Epson Corporation | Organic electroluminescent device compensated pixel driver circuit |
| JP4350334B2 (en) | 2002-01-25 | 2009-10-21 | シャープ株式会社 | Display element lighting control method, display control method, and display device |
| KR100740086B1 (en) * | 2004-05-24 | 2007-07-16 | 삼성에스디아이 주식회사 | Data driver and light emitting display using the same |
| KR100737062B1 (en) | 2005-06-17 | 2007-07-06 | 엘지이노텍 주식회사 | Organic light emitting display device and driving method thereof |
| KR100638008B1 (en) | 2005-06-21 | 2006-10-23 | 엘지이노텍 주식회사 | Organic light emitting display device and driving method thereof |
| KR100737063B1 (en) * | 2005-06-21 | 2007-07-06 | 엘지이노텍 주식회사 | Organic light emitting display device and driving method thereof |
| KR100747236B1 (en) * | 2005-11-29 | 2007-08-07 | 엘지전자 주식회사 | Organic Electro-Luminescence Display Device And Fabricating Method Thereof |
| JP2008083431A (en) * | 2006-09-28 | 2008-04-10 | Casio Comput Co Ltd | Drive device and display device equipped with the same |
| KR100911979B1 (en) * | 2008-03-13 | 2009-08-13 | 삼성모바일디스플레이주식회사 | Organic light emitting display and driving method thereof |
| JP2011209577A (en) * | 2010-03-30 | 2011-10-20 | Denso Corp | Organic el display device and driving method thereof |
| JP5610026B2 (en) * | 2013-04-22 | 2014-10-22 | 株式会社デンソー | Organic EL display device and driving method thereof |
| CN110619819B (en) * | 2019-09-17 | 2021-07-13 | Oppo广东移动通信有限公司 | Folding screen and electronic equipment |
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| JPS525357B2 (en) * | 1973-10-29 | 1977-02-12 | ||
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| JPH0313987A (en) * | 1989-06-13 | 1991-01-22 | Sharp Corp | Driving circuit for fluorescent display tube |
| JPH03246587A (en) * | 1990-02-26 | 1991-11-01 | Nec Corp | Driving method for fluorescent display tube |
| JPH04128871A (en) * | 1990-09-20 | 1992-04-30 | Nec Kagoshima Ltd | Fluorescent display device |
| JP3038929B2 (en) * | 1991-01-09 | 2000-05-08 | 日本電気株式会社 | Fluorescent display tube controller |
| JPH09115673A (en) * | 1995-10-13 | 1997-05-02 | Sony Corp | Light emission element or device, and driving method thereof |
| JPH1031991A (en) * | 1996-07-12 | 1998-02-03 | Nippon Muki Co Ltd | Storage battery separator |
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1998
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| KR19990088200A (en) | 1999-12-27 |
| GB9910680D0 (en) | 1999-07-07 |
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