200401132 (1) 攻、發明說明 [發明所屬之技術領域】 本發明係關於一種液晶顯示裝置之檢查方法。 【先前技術】 使用在具有顯示部之可攜帶機器等的液晶顯示元件之 顯示畫面大多具有點矩陣顯示部及圖像顯示部二種顯示元 件。例如，行動電話中之點矩陣顯示部上係顯示電話號碼 $文字，圖像顯示部上係顯示電波之狀態或電池殘量，或 者其他符號或記號。在此所使用的液晶顯示元件大多做成 爲’從成本及驅動之容易度，到使點矩陣顯示部之數據線 #圖像顯示部之圖像段連接，增加點矩陣顯示部之掃瞄電 極線以做爲圖像段用掃瞄電極線。 如此地連接之時，圖像顯示部之一個圖像段具有：；!） 可做爲點矩陣顯示部之一點而驅動，使其驅動控制變成單 純、2)圖像並非以點之集合而可顯示之故，與點矩陣顯 示圖像形狀者比較，可使形狀更鮮明淸晰地顯示、3)不 需要使用以點形成圖像形狀用之圖型產生器等之優點。 —般圖像段之數目比一條掃瞄電極線之點數（=橫向並 列點數=數據線數）少，因此將點矩陣顯示部之數據線之一 部分間隔拔除，而連接到圖像段。 此種行動電話之製造過程中，爲了檢查顯示畫面之點 矩陣顯示部的畫面缺陷 '尤其是爲了檢查線開路及線短路 方面’而進行全畫面ON顯示' 全畫面OFF顯示、全畫面 (2) (2)200401132 方格顯示。而且，爲了檢查顯示畫面之圖像顯示部中透明 電極之間短路之有無，如第5圖所示，將各圖像段依照順 序點亮◊這是在點矩陣顯示部僅在前後相鄰二個數據線之 間有產生短路之可能性，相對於此在圖像顯示部中，一個 數據線與二個以上之數據線相鄰’因而亦有與二個以上之 數據線產生短路之可能性的情形。 根據第2圖舉例說明之時’第2圖之右上側顯示有顯 示電波狀態的圖像，左上側顯示有顯示電池殘量的圖像以 及顯示有來自於個別圖像段向數據線拉出之配線。而且， 個別圖像段之細部顯示在第3圖及第4圖中。共通（ common )電極之結線顯不在第23圖、段（segment)電 極之結線則顯示在第24圖中。 在此，連接到S 1 9之圖像段係與連接到S 1 8之圖像段 以及連接到 S2〇之圖像段相鄰接。數據線間之短路會在 S 1 8 -S19間及S19-S20間之二個線路中產生，因此檢查這 二組的話即夠充分。但是’連接到s 1 6之圖像段與s 1 5、 S ] 7、S 1 8之三個數據線及圖像顯示部或點矩陣顯示部相 鄰接。從而對S16而言’必須檢査S15-S16、S16-S17 ' S I 6 - S 1 8之三線路3組數據線間有無短路。 透明電極之間存在有短路之時，一方之圖像段點亮時 會經由短路部分而對另一方之圖像段施加電壓，因而使本 來應該沒有點亮之圖像段也變成同時點亮。因而，從各圖 像段依照順序號碼點亮時之顯示狀態觀看之時，在確認順 序號碼以外之圖像段沒有點亮之下’可檢查出圖像顯示部 (3) (3)200401132 之透明電極之間有無短路。 〔本發明所欲解決的課題〕 檢查圖像顯示部之透明電極之間有無短路之時，如第 5圖所示，爲了使各圖像段依照順序號碼點亮，檢查必須 花很多時間。而且，爲了縮短檢查時間，點亮掃猫時間變 短時也會使短路段的點亮時間變短，因而會使不良選別的 遺漏增加之故，因此使檢查時間之縮短是困難。爲了注視 依照順序點亮之圖像段，檢查員的眼睛大多疲勞。 【發明內容】 〔用以解決課題之手段〕 在點矩陣顯示部上使1點方格顯示、2點方格顯示、 3點方格顯示、4點方格顯示等之多種之方格顯示依照順 序或者同時地顯示。圖像顯示部上不實施顯示。圖像顯示 部上不實施顯示而在點矩陣顯示部進行上述之方格顯示之 時’對應於各方格顯示的數據段之每】線、每2線、每3 線、每4線施加不同的電壓，與數據段連接之圖像段也施 加相同的電壓。某一對的圖像段間有電極短路之時，在此 一對的圖像段上施加不同的電壓而進行方格顯示時，該段 電極之點矩陣顯示部上會變成異常顯示。以點亮電壓施加 部變爲黑色、非點亮電壓施加部變爲白色位置顯示之例說 13月時’點亮電壓被拉到非點亮電壓而變成低電壓時，黑色 會變成淡黑色而顯示，非點亮電壓被拉到點亮電壓而變成 -8 - (4) (4)200401132 高電壓時，本來之白色會變成淡黑色而顯示。亦即，圖像 段部之短路不良，可以由觀看點矩陣顯示部之顯示狀態而 可檢出。 而且此時，同時地消耗電流値變成比正常値大，因此 藉由監視消耗電流値，可檢出圖像段部之短路不良。消耗 電流値變成比正常値大之下，而使構成驅動電路的電子元 件之發熱量變大，因此以熱寫法（thermography)等監視 發熱量之下，可檢出圖像段部之短路不良。通常電源電路 之內部阻抗並非很小。伴隨著消耗電流之增大時，液晶驅 動電壓變成比正常値低’因此藉由監視液晶驅動電壓，可 檢出圖像段部之短路不良。 【實施方式】 本發明液晶顯示裝置之檢查方法係針對至少具有點矩 陣顯示部及圖像顯示部二個顯示元件之液晶顯示裝置，其 中一方之顯示元件的圖像顯示部不進行顯示，另—方之顯 示元件的點矩陣顯示部上則將1點方格顯示、2點方格顯 示、3點方格顯示、4點方格顯示等之多種之方格顯示， 依照順序或者同時地顯不。在此，所謂I點方格顯示是指 ’一個白色點及一個黑點在縱向及橫向上以1點之單位成 交錯的重覆顯示圖型之謂（參照第6圖）。並且，所謂2點 方格顯示是指，縱橫各二個點總計四個點所構成的白點， 以及縱橫各二個點總計四個點所構成的黑點在縱向及橫向 上以2點之單位成交錯的重覆顯示圖型之謂（參照第7圖） (5) (5)200401132 。3點方格顯示' 4點方格顯示也是相同（參照第8圖 '第 9圖）。 在此思考各種之點方格顯示。以一條掃瞄電極寬度而 切出顯示畫面看去之時’ I點方格顯示中係1點單位之白 及黑之顯示圖型依序地反覆重現。2點方格顯示中係2點 單位之白及黑之顯示圖型依序地反覆重現。3點方格顯示 係3點單位之白及黑之顯示圖型依序地反覆重現。4點方 格顯示係4點單位之白及黑之顯示圖型依序地反覆重現。 對應於各種方格顯示之數據段的每1線、每2線、每3線 、每4線上施加不同的電壓。 在圖像顯示部上不進行顯示而對點矩陣顯示部實施上 述的方格顯示之時，對應於各種方格顯示之數據段的每1 線、每2線、每3線、每4線上施加不同的電壓，連接到 數據段之圖像段也施加相同的電壓。某一對的圖像段間有 電極短路之時，在此一對的圖像段上施加不同的電壓而進 行方格顯示時’該段電極之點矩陣顯示部上會變成異常顯 示。以點亮電壓施加部變爲黑色、而非點亮電壓施加部變 爲白色位置顯示之例說明時，點亮電壓被拉到非點亮電壓 而變成低電壓時，黑色會變成淡黑色而顯示，非點亮電壓 被拉到點亮電壓而變成高電壓時，本來之白色會變成淡黑 色而顯示。亦即’一方之顯示元件的圖像顯示部之短路不 良，可以利用觀看另一方之顯示元件的點矩陣顯示部之顯 示狀態而可檢出。 而且此時’同時地短路電流在電極中流動之故，液晶 -10- (6) (6)200401132 顯示裝置之消耗電流値變成比正常値大，因此藉由監視消 耗電流値，可檢出圖像段部之短路不良。消耗電流値變成 比正常値大之時，構成驅動電路的電子元件之發熱量變大 。因此以熱寫法等監視發熱量之下，可檢出圖像段部之短 路不良。通常，電源電路之內部阻抗並非很小，伴隨著消 耗電流之增大時，液晶驅動電壓變成比正常値低。因此藉 由監視液晶驅動電壓，可檢出圖像段部之短路不良。 〔實施例〕 以下將參照附圖而說明本發明之實施例。 (第1實施例） 第6圖爲本發明之第1實施例中第1顯示畫面的模式 圖。在此之位置顯示，係以點亮電壓施加部爲黑色位置顯 示，非點亮電壓施加部爲白色顯示之例說明。第6圖之點 矩陣顯示部是以1點單位之方格顯示。圖像顯示部則均未 做任何顯示。 · 在此，考量在電極部上產生電極短路之情形。連接到 偶數號段電極上之圖像電極，與連接到奇數號段電極上之 · 圖像電極之間產生短路時，該段電極之點矩陣顯示部變成 _ 異常顯示。亦即，正常之方格顯示中，偶數號段電極及奇 數號段電極上之驅動波形不同，圖像顯示部上短路時，點 亮電壓被拉到非點亮電壓而變低時，黑色變成淡之顯示， 非點亮電壓被拉升到點亮電壓時，白色變成淡黑色之顯示 。同時消耗電流値變成比正常値大、發熱量增加、液晶驅 (7) (7)200401132 動電壓下降。 從而，連接到偶數號段電極上之圖像電極與連接到奇 數號段電極上之圖像電極之間產生的短路，可由點矩陣顯 示部的顯示狀態、消耗電流、發熱量、驅動電壓而檢出。 第7圖爲本發明之第1實施例中第2顯示畫面的模式 圖。第7圖之點矩陣顯示部是以2點單位之方格而顯示者 。圖像顯示部亦均未做任何顯示。在此爲了方便說明，以 η爲自然數，點矩陣顯示部之4η號段電極以及4n+ 1號段 電極稱爲第1群、4n + 2號段電極以及4n + 3號段電極稱爲 第2群。 連接到第1群段電極上之圖像電極與連接到第2群段 電極上之圖像電極之間產生短路之時，該段電極之點矩陣 顯示部變成異常顯示。亦即，正常之2點方格顯示中，第 ]群段電極及第2群段電極上之驅動波形不同。短路之4 η 號段電極或者4η+1號段電極，及4η + 2號段電極或者 4 η + 3號段電極並未被施加正常的驅動波形。同時消耗電 流値變成比正常値大，發熱量增加，液晶驅動電壓下降。 從而，連接到4η號段電極或者4η+1號段電極上之圖 像電極與連接到4η + 2號段電極或者4η + 3號段電極上之圖 像電極之間產生的電極短路，可由點矩陣顯示部的顯示狀 態等而同樣地檢出。 第8圖爲本發明之第]實施例中第3之顯示畫面的模 式圖。第8圖之點矩陣顯示部是以3點單位之方格而顯示 。圖像顯示部亦均未做任何顯示。在此爲了方便說明，以 -12 - (8) (8)200401132 η爲自然數，點矩陣顯示部之6 η號段電極、6 η + 1號段電 極' 6 η + 2號段電極稱爲第]群、而以6 η + 3號段電極、 6 η + 4號段電極、6 η + 5號段電極稱爲第2群。 連接到第1群段電極上之圖像電極與連接到第2群段 電極上之圖像電極之間產生短路之時，該段電極之點矩陣 顯示部變成異常顯示。亦即，正常之3點方格顯示中，第 1群段電極及第2群段電極上之驅動波形不同。短路之6η 號段電極或者6η+1號段電極或者6η + 2號段電極，以及 6η + 3號段電極或者6η + 4號段電極或者6η + 5號段電極並 未被施加正常的驅動波形。同時消耗電流値變成比正常値 大、發熱量增加、液晶驅動電壓下降。 從而，連接到6 η號段電極或者6 η+1號段電極或者 6η + 2號段電極上之圖像電極，與連接到6η + 3號段電極或 者6η + 4號段電極或者6η + 5號段電極上之圖像電極之間產 生的電極短路，可由點矩陣顯示部的顯示狀態等而同樣地 檢出。 第9圖爲本發明之第〗實施例中第4之顯示畫面的模 式圖。第9圖之點矩陣顯示部是以4點單位之方格而顯示 。圖像顯示部亦均未做任何顯示。在此爲了方便說明，以 η爲自然數’點矩陣顯示部之8η號段電極、8 η + 1號段電 極、8η + 2號段電極、8η + 3號段電極稱爲第】群、而以 8η + 4號段電極、8η + 5號段電極、8η + 6號段電極、8η + 7 號段電極稱爲第2群。 連接到第1群段電極上之圖像電極與連接到第2群段 -13- (9) (9)200401132 電極上之圖像電極之間產生短路之時，該段電極之點矩陣 顯示部變成異常顯示。亦即，正常之4點方格顯示中，第 ]群段電極及第2群段電極上之驅動波形不同。8 η號段電 極1 8η+1號段電極' Sn + 2號段電極' 8η + 3號段電極之中 的任何一個，與 8η + 4號段電極、8η+5號段電極、8η + 6 號段電極、8η + 7號段電極之中的任何一個產生短路之時 ，短路之組上並未被施加正常的驅動波形。同時消耗電流 値變成比正常値大 '發熱量增加、液晶驅動電壓下降。 從而，8η號段電極、8η+1號段電極、8η + 2號段電極 、8η + 3號段電極之中的任何一個，與8η + 4號段電極、 S η + 5號段電極、8 η + 6號段電極、8 η + 7號段電極之中的任 何一個之間產生的電極短路，可由點矩陣顯示部的顯示狀 態等而同樣地檢出。 在此液晶顯示裝置上顯示之各顯示圖型、及檢查可能 之圖像段之間的關係之綜合一覽表顯示在第1 4圖中。 有幾個具體的圖像段電極短路及異常顯示之例子將顯 示如下。其中顯示有在連接S1號段電極及S11號段電極 的圖像段電極上產生電極短路之例。此面板上依照順序顯 示有1點方格顯示、2點方格顯示、3點方格顯示、4點 方格顯示。第1 5圖爲顯示1點方格顯示之圖。水平方向 在共通電極上從上向下以線順序掃瞄而顯示。S 1號段電 極及S 1 1號段電極之顯示內容均相同。即使該電極間產生 電極短路時，在產生短路的兩電極間並未有電位差’因此 不會產生異常顯示。第16圖爲顯示2點方格顯示之圖。 -14- (10) (10)200401132 在此’ S ]號段電極之顯示內容與s 1 1號段電極之顯示內 容不同。短路電流經由短路部分而流動，施加到段電極上 的電壓變成以在白色顯示與黑色顯示中間的灰色顯示。顯 示面積之大小爲在35公厘X 25公厘中有96點X 64點+圖 像顯示’液晶驅動1C上有使用內藏升壓電路之精工社-愛 普生公司製之 SID 1 0605，其可使內部產生四倍升壓，液 晶驅動電壓爲8 2伏特、電源電壓爲3 0伏特之液晶模組 之情況時，消耗電流從5 00微安（// A)上升到1毫安（mA) 。由於消耗電流之上升，使內藏有液晶驅動器之升壓電路 周邊的消耗電流增加，因而使液晶驅動1C之封裝溫度上 升。 第1 7圖爲顯示3點方格顯示之圖。在此，s 1號段電 極之顯示內容與S 1 1號段電極之顯示內容不同。短路電流 經由短路部分而流動，施加到段電極上的電壓變更在白色 顯示與黑色顯示中間的灰色顯示。第1 8圖爲顯示4點方 格顯示之圖。在此，S 1號段電極之顯示內容與S 1 1號段 電極之顯示內容相同。產生短路之兩電極間沒有電位差之 故，因此並未產生異常顯示。 其次，顯示有連接S3號段電極與S7號段電極之圖像 電極上產生電極短路之例。此面板上依照順序顯示有1點 方格顯示、2點方格顯示、3點方格顯示、4點方格顯示 。第1 9圖爲顯示1點方格顯示之圖。第20圖爲顯示2點 方格顯示之圖。第21圖爲顯示3點方格顯示之圖。此三 者之顯示圖型中，S3號段電極之顯示內容與S7號段電極 (11) (11)200401132 之顯示內容相同。產生短路之兩電極間沒有電位差之故， 因此並未產生異常顯示D第2 2圖爲顯示4點方格顯示之 圖。在此，S 3號段電極之顯示內容與S 7號段電極之顯示 內容不同。短路電流經由短路部分而流動，施加到段電極 上的電壓變成在白色顯示與黑色顯示中間的灰色顯示。 綜合上述爲止之實施形態，以η爲自然數而m爲0 以上之整數時，可檢出η點方格顯示中夾在（n-1+mn)線 之間的線間短路。亦即，可檢出在1點方格顯示中之偶數 號與奇數號的線間短路 '在2點方格顯示中之線間夾入 (1 +2 m)線之相鄰的線間短路、在3點方格顯示中之線間夾 入（2 + 3 m)線之相鄰的線間短路。N爲5以上也相同。 因而’將1點方格顯示、2點方格顯示、3點方格顯 不、4點方格顯不依照順序而顯示之時，可以檢出在個別 相鄰線間的短路、線間夾有]線之每2線之線間的短路、 線間夾有2線之每3線之線間的短路、線間夾有3線之每 4線之線間的短路。 並且’具有與第2顯示畫面同樣效果的另外之第2顯 示畫面例顯示在第1 0圖、第]1圖中。 (第2實施例） 將以第1圖說明第2實施例。第1圖中，領域5顯示 1點方格顯示。領域ό顯示2點方格顯示。領域7顯示3 點方格顯示。領域8顯示4點方格顯示。 如此地顯示之時’可使從第]實施例所顯示的第1顯 -16 - (12) (12)200401132 示畫面到第4顯示畫面所述之電極短路一起被檢出。 液晶顯示面板一般係以線順序掃猫方式將顯不畫面顯 示出來。從而，顯示1個畫面之時間分別有五個：（1)顯 示圖像顯示部之時間、（2)顯示1點方格顯示部之時間、 (3)顯示2點方格顯示部之時間、（4)顯示3點方格顯示 部之時間、（5)顯示4點方格顯示部之時間。因而，在多 數個之顯示圖型上將在每個顯示圖型進行切換之數據線信 號於同一顯示圖型內，以上述（2 )到（5 )之時間進行切換。 並且’第2實施例之其他顯示畫面之例顯示於第1 2圖、 第1 3圖中。 〔發明之效果〕 依照以上說明之本發明，在檢查圖像顯示部之電極短 路之時’利用觀看點矩陣顯示部、而非圖像顯示部之顯示 狀態時，可檢出短路，不必依序地顯示圖像顯示部，即可 在短時間且在最少的遺漏下實施顯示檢查。 【圖式簡單說明】 第1圖係顯示本發明之第2實施形態的一例之圖。 第2圖係顯示本發明之第1實施例中之液晶面板之圖 〇 第3圖係本發明之第〗實施例中之液晶面板之圖像顯 示部之細部圖。 第4圖係本發明之第1實施例中之液晶面板之另外的 (13) (13)200401132 圖像顯示部之細部圖。 第5圖係顯示先前技術之圖像顯示部檢查之顯示順序 之圖。 第6圖係顯示本發明之第1實施例中的第]顯示畫面 之一例之圖。 第7圖係顯示本發明之第1實施例中的第2顯示畫面 之一例之圖。 第8圖係顯示本發明之第]實施例中的第3顯示畫面 之一例之圖。 第9圖是顯示本發明之第]實施例中的第4顯示畫面 之一例之圖。 第1 〇圖是顯示本發明之第1實施例中的第2顯示畫 面之另一例之圖。 第1 1圖是顯示本發明之第1實施例中的第2顯示畫 面之另一例之圖。 第】2圖係顯示本發明之第2實施形態的另一例之圖 〇 第1 3圖係顯示本發明之第2實施形態的另一例之圖 〇 第1 4圖係檢查可能之組合的一覽表。 第1 5圖是顯示本發明之第1實施例中在產生電極短 路時的第]顯示畫面之一例之圖。 第1 6圖是顯示本發明之第1實施例中在產生電極短 路時在第2顯示畫面上之異常顯示的一例之圖。 -18- (14) (14)200401132 第]7圖是顯示本發明之第！實施例中在產生電極短 路時在第3顯示畫面上之異常顯示的一例之圖。 第]8圖是顯示本發明之第1實施例中在產生電極短 路時的第4顯示畫面之一例之圖。 第1 9圖是顯示本發明之第！實施例中在產生其他電 極短路時的第1顯示畫面之一例之圖。 第2 0圖是顯示本發明之第1實施例中在產生其他電 極坦路時的第2顯不畫面之一例之圍。 鲁 第2 1圖是顯示本發明之第1實施例中在產生其他電 極短路時的第3顯不畫面之一*例之圖。 第22圖是顯示本發明之第1實施例中在產生其他電 極短路時的第4顯示畫面之一例之圖。 第23圖是顯示本發明之第1實施例中液晶面板之共 通電極結線之細部圖。 第24圖是顯示本發明之第1實施例中液晶面板之段 電極結線之細咅β目。 · 元件符號對照表 1 :圖像顯示部 2 =點矩陣顯示部 3 =數據線 4 :圖像段 5 =顯示〗點方格顯示之領域 6 =顯示2點方格顯示之領域 -19- (15) (15)200401132 7 :顯示3點方格顯示之領域 8 :顯示4點方格顯示之領域 9 : S 1 - S 1 1段電極間之短路 】0 : S 3 - S 7段電極間之短路200401132 (1) Description of the invention [Technical field to which the invention belongs] The present invention relates to a method for inspecting a liquid crystal display device. [Prior Art] The display screens of liquid crystal display elements used in portable devices and the like having a display portion often have two types of display elements: a dot matrix display portion and an image display portion. For example, the dot matrix display section in a mobile phone displays the phone number $, and the image display section displays the state of the radio wave, the remaining battery level, or other symbols or signs. Most of the liquid crystal display elements used here are made from the cost and ease of driving, to connecting the data segment of the dot matrix display section #image display section, and increasing the scanning electrode lines of the dot matrix display section. Scanning electrode lines are used as image segments. When connected in this way, one image segment of the image display section has:;) can be driven as one point of the dot matrix display section, so that its drive control becomes simple, 2) the image can For display, compared with the dot matrix display of the image shape, the shape can be displayed more clearly and clearly. 3) The advantage of using a pattern generator for forming the image shape with dots is not required. -The number of general image segments is less than the number of points of a scanning electrode line (= parallel horizontal points = data lines). Therefore, one part of the data lines in the dot matrix display section is disconnected and connected to the image segment. In the manufacturing process of this type of mobile phone, in order to check the screen defect of the dot matrix display part of the display screen, especially to check for open and short wire, full screen ON display is displayed. (2) 200401132 grid display. In addition, in order to check the presence of a short circuit between transparent electrodes in the image display portion of the display screen, as shown in FIG. 5, each image segment is lit in sequence. This is the case where the dot matrix display portion is adjacent to each other. There may be a short circuit between the two data lines. In contrast, in the image display section, one data line is adjacent to two or more data lines. Therefore, there is also a possibility of short circuit with two or more data lines. Situation. According to the illustration in Figure 2, an image showing the state of the radio wave is displayed on the upper right side of Figure 2. On the upper left side, an image showing the remaining battery level is displayed. Wiring. The details of the individual image segments are shown in FIGS. 3 and 4. The junction line of the common electrode is not shown in Fig. 23, and the junction line of the segment electrode is shown in Fig. 24. Here, the image segment connected to S 1 9 is adjacent to the image segment connected to S 1 8 and the image segment connected to S 2 0. The short circuit between the data lines will occur in two lines between S 1 8 -S19 and S19-S20, so it is sufficient to check these two groups. However, the image segment connected to s 1 6 is adjacent to the three data lines s 1 5, S] 7, S 1 8 and the image display portion or the dot matrix display portion. Therefore, for S16 ’, it is necessary to check whether there are short circuits between the three data lines of S15-S16, S16-S17 'S I 6-S 1 8 ter. When there is a short circuit between the transparent electrodes, when one image segment is lit, a voltage is applied to the other image segment via the short-circuited portion, so that the image segments that should have not been lit are also lit at the same time. Therefore, when viewing each image segment in accordance with the display state when the sequence number is lit, after confirming that image segments other than the sequence number are not lit, the image display section (3) (3) 200401132 can be checked. Is there a short circuit between the transparent electrodes? [Problems to be Solved by the Invention] When checking whether there is a short circuit between the transparent electrodes of the image display section, as shown in FIG. 5, in order to light up each image segment according to the sequence number, the inspection must take a lot of time. In addition, in order to shorten the inspection time, shortening the lighting time of the cat will also shorten the lighting time of the short-circuit section, which will increase the omission of poor selections. Therefore, it is difficult to shorten the inspection time. In order to look at the sequentially lit image segments, the inspector's eyes are mostly fatigued. [Summary of the Invention] [Means for Solving the Problems] According to the dot matrix display section, a variety of grid displays such as 1-point grid display, 2-point grid display, 3-point grid display, 4-point grid display, etc. Displayed sequentially or simultaneously. No image is displayed on the image display section. When the above-mentioned grid display is performed on the dot matrix display section without displaying on the image display section, 'corresponding to each of the data segments displayed by each grid line, every 2 lines, every 3 lines, and every 4 lines are different. The same voltage is applied to the image segment connected to the data segment. When there is a short circuit between electrodes in a pair of image segments, when different voltages are applied to the pair of image segments for grid display, the dot matrix display portion of the electrodes in that segment becomes abnormally displayed. For example, when the lighting voltage application part becomes black and the non-lighting voltage application part becomes white, for example, when 'lighting voltage is pulled to a non-lighting voltage and becomes low voltage in 13 months, black becomes light black and Display, the non-lighting voltage is pulled to the lighting voltage and becomes -8-(4) (4) 200401132 High voltage, the original white will become light black and display. That is, a short circuit in the image segment portion can be detected by the display state of the viewing point matrix display portion. Moreover, at this time, the current consumption 値 becomes larger than normal at the same time. Therefore, by monitoring the current consumption 値, it is possible to detect a short circuit defect in the image segment. The current consumption becomes larger than normal, which increases the amount of heat generated by the electronic components constituting the driving circuit. Therefore, by monitoring the amount of heat generated by thermography or the like, short-circuit defects in the image segment can be detected. Usually the internal impedance of the power supply circuit is not very small. When the consumption current increases, the liquid crystal driving voltage becomes lower than normal '. Therefore, by monitoring the liquid crystal driving voltage, it is possible to detect a short circuit defect in the image segment. [Embodiment] The inspection method of the liquid crystal display device of the present invention is directed to a liquid crystal display device having at least two display elements of a dot matrix display portion and an image display portion. The image display portion of one of the display elements does not display, and the other— The dot matrix display section of the square display element displays a variety of grids such as 1-point grid display, 2-point grid display, 3-point grid display, 4-point grid display, etc., which are displayed sequentially or simultaneously. . Here, the “I-point grid display” means that a white dot and a black dot are repeatedly displayed in a unit of one dot in the vertical and horizontal directions (see FIG. 6). In addition, the so-called two-point grid display refers to a white point formed by a total of four points in the vertical and horizontal directions and a black point formed by a total of four points in the vertical and horizontal directions. Units are staggered and repeatedly displayed (refer to Figure 7) (5) (5) 200401132. The 3-point grid display is the same as the 4-point grid display (see Figure 8 and Figure 9). Think about the various dot grids here. When the display screen is cut out by scanning the width of one electrode, the display pattern of white dots and black dots in the 1-point grid display is sequentially reproduced sequentially. In the 2-point grid display, the white and black display patterns of 2-point units are sequentially reproduced. 3-point grid display The white and black display patterns of 3-point units are sequentially reproduced repeatedly. The 4-point grid display repeats the display pattern of white and black in order of 4 points. Different voltages are applied to every 1 line, every 2 lines, every 3 lines, and every 4 lines of the data segments displayed in various grids. When the above-mentioned grid display is performed on the dot matrix display without displaying on the image display section, it is applied to every 1 line, every 2 lines, every 3 lines, and every 4 lines of the data segment corresponding to the various grid displays. For different voltages, the same voltage is applied to the image segments connected to the data segment. When there is an electrode short between the image segments of a certain pair, when different voltages are applied to the image segments of the pair to perform grid display, the dot matrix display portion of the electrode of that segment will be abnormally displayed. In the case where the lighting voltage application section becomes black and the non-lighting voltage application section becomes white, for example, when the lighting voltage is pulled to a non-lighting voltage and becomes a low voltage, black will be light black and displayed. When the non-lighting voltage is pulled to the lighting voltage and becomes a high voltage, the original white will become light black and displayed. That is, the short circuit of the image display portion of the display element of one side is defective, and can be detected by viewing the display state of the dot matrix display portion of the other display element. And at this time, the reason that the short-circuit current flows in the electrode at the same time, the current consumption of the liquid crystal -10- (6) (6) 200401132 display device becomes larger than normal, so by monitoring the current consumption, the graph can be detected. Defective short circuit in the image section. When the current consumption becomes larger than normal, the heat generation of the electronic components constituting the driving circuit becomes larger. Therefore, by monitoring the heat generation by thermal writing or the like, short-circuit defects in the image segment can be detected. Generally, the internal impedance of the power supply circuit is not very small. When the current consumption increases, the liquid crystal drive voltage becomes lower than normal. Therefore, by monitoring the liquid crystal driving voltage, a short circuit defect in the image segment can be detected. [Embodiment] An embodiment of the present invention will be described below with reference to the drawings. (First Embodiment) Fig. 6 is a schematic diagram of a first display screen in the first embodiment of the present invention. The display at this position is an example in which the lighting voltage application portion is displayed in black, and the non-lighting voltage application portion is displayed in white. The dots in Figure 6 are displayed in a grid of one dot. None of the image display is displayed. · Consider the case where an electrode short occurs at the electrode section. When a short circuit occurs between an image electrode connected to an even-numbered segment electrode and an image electrode connected to an odd-numbered segment electrode, the dot matrix display section of that electrode becomes _ abnormal display. That is, in the normal grid display, the driving waveforms on the even-numbered segment electrodes and the odd-numbered segment electrodes are different. When the image display section is short-circuited, the lighting voltage is pulled to a non-lighting voltage and becomes low, and black becomes Light display, when the non-lighting voltage is pulled up to the lighting voltage, white becomes light black display. At the same time, the current consumption becomes larger than normal, the heat generation increases, and the driving voltage of the LCD driver (7) (7) 200401132 decreases. Therefore, a short circuit between the image electrode connected to the even-numbered segment electrode and the image electrode connected to the odd-numbered segment electrode can be detected by the display status, current consumption, heat generation, and driving voltage of the dot matrix display section. Out. Fig. 7 is a schematic diagram of a second display screen in the first embodiment of the present invention. The dot matrix display section in FIG. 7 is displayed in a grid of 2 dot units. No image is displayed on the image display. For convenience, η is used as a natural number. The 4η segment electrode and 4n + 1 segment electrode in the dot matrix display section are referred to as the first group, the 4n + segment 2 electrode, and the 4n + 3 segment electrode are referred to as the second group. group. When a short circuit occurs between the image electrode connected to the electrode of the first group and the image electrode connected to the electrode of the second group, the dot matrix display portion of the electrode becomes abnormal. That is, in the normal 2-point grid display, the driving waveforms on the group electrode and the group electrode are different. The 4 η segment electrode or 4η + 1 segment electrode and the 4η + 2 segment electrode or 4 η + 3 segment electrode that are short-circuited are not applied with a normal driving waveform. At the same time, the current consumption becomes larger than normal, the heat generation increases, and the liquid crystal drive voltage decreases. Therefore, an electrode short circuit between the image electrode connected to the 4η segment electrode or the 4η + 1 segment electrode and the image electrode connected to the 4η + segment 2 electrode or the 4η + 3 segment electrode can be clicked. The display state and the like of the matrix display unit are similarly detected. Fig. 8 is a pattern diagram of a third display screen in the first embodiment of the present invention. The dot matrix display section in FIG. 8 is displayed in a grid of 3 dots. No image is displayed on the image display. For the convenience of explanation, let -12-(8) (8) 200401132 η be a natural number. The 6 η segment electrode and 6 η + 1 segment electrode '6 η + 2 segment electrode in the dot matrix display section are called The first group, and the 6 η + 3 segment electrode, the 6 η + 4 segment electrode, and the 6 η + 5 segment electrode are referred to as the second group. When a short circuit occurs between the image electrode connected to the electrode of the first group and the image electrode connected to the electrode of the second group, the dot matrix display portion of the electrode becomes abnormal. That is, in the normal 3-point grid display, the driving waveforms on the first group segment electrode and the second group segment electrode are different. The 6η segment electrode or 6η + 1 segment electrode or 6η + 2 segment electrode and the 6η + 3 segment electrode or 6η + 4 segment electrode or 6η + 5 segment electrode are not applied to the short circuit. . At the same time, the current consumption becomes larger than normal, the heat generation increases, and the liquid crystal drive voltage decreases. Therefore, the image electrode connected to the 6 η segment electrode or the 6 η + 1 segment electrode or the 6η + segment electrode is connected to the 6η + 3 segment electrode or the 6η + 4 segment electrode or 6η + 5 The electrode short circuit between the image electrodes on the segment electrode can be detected similarly from the display state of the dot matrix display section and the like. Fig. 9 is a pattern diagram of the fourth display screen in the first embodiment of the present invention. The dot matrix display section in FIG. 9 is displayed in a grid of 4 dot units. No image is displayed on the image display. Here, for convenience of explanation, the 8η segment electrode, 8 η + 1 segment electrode, 8η + 2 segment electrode, and 8η + 3 segment electrode are referred to as the first group with η as a natural number 'dot matrix display section, and The 8η + 4 segment electrode, the 8η + 5 segment electrode, the 8η + 6 segment electrode, and the 8η + 7 segment electrode are called the second group. When a short circuit occurs between the image electrode connected to the electrode in the first group and the image electrode connected to the electrode in the second group -13- (9) (9) 200401132, the dot matrix display section of the electrode It becomes abnormal display. That is, in the normal 4-point grid display, the driving waveforms on the group electrode and the group electrode are different. 8 η segment electrode 1 8η + 1 segment electrode 'Sn + 2 segment electrode' Any of 8η + segment electrode, and 8η + 4 segment electrode, 8η + 5 segment electrode, 8η + 6 When any of the segment electrodes and 8η + 7 segment electrodes are short-circuited, normal driving waveforms are not applied to the short-circuited group. At the same time, the current consumption 値 becomes larger than normal '' The heat generation increases and the liquid crystal drive voltage decreases. Therefore, any of the 8η segment electrode, the 8η + 1 segment electrode, the 8η + segment 2 electrode, the 8η + segment 3 electrode, and the 8η + segment 4 electrode, the S η + segment 5 electrode, 8 An electrode short circuit generated between any of the η + segment electrodes and 8 η + segment electrodes can be similarly detected from the display state of the dot matrix display section and the like. A comprehensive list of the relationship between each display pattern displayed on this liquid crystal display device and the image segments that can be checked is shown in FIG. 14. Several specific examples of short-circuit and abnormal display of the electrode in the image segment will be shown below. An example is shown in which an electrode short circuit occurs between the image segment electrodes connected to the S1 segment electrodes and the S11 segment electrodes. On this panel, 1-point grid display, 2-point grid display, 3-point grid display, and 4-point grid display are displayed in this order. Figure 15 shows a one-point grid. Horizontal direction Scans the common electrode from top to bottom in a line order and displays it. The display content of S 1 segment electrode and S 1 1 segment electrode are the same. Even when an electrode short circuit occurs between the electrodes, there is no potential difference between the two electrodes where the short circuit occurs, so no abnormal display occurs. Figure 16 shows a 2-point grid display. -14- (10) (10) 200401132 Here, the display content of the ‘S] segment electrode is different from the display content of the s 1 segment electrode. The short-circuit current flows through the short-circuited portion, and the voltage applied to the segment electrode becomes a gray display in the middle of the white display and the black display. The size of the display area is 35 points x 25 mm with 96 points x 64 points + image display 'LCD driver 1C has SID 1 0605 manufactured by Seikosha-Epson Corporation using a built-in booster circuit. When the internal voltage is increased by four times, and the liquid crystal module with a driving voltage of 82 volts and a power supply voltage of 30 volts, the current consumption increases from 500 microamperes (// A) to 1 milliamp (mA). . As the consumption current rises, the current consumption around the booster circuit with the built-in liquid crystal driver increases, which increases the package temperature of the liquid crystal driver 1C. Figure 17 shows a 3-point grid. Here, the display content of the electrode in the s1 segment is different from the display content of the electrode in the s1 segment. The short-circuit current flows through the short-circuited portion, and the voltage applied to the segment electrode changes in a gray display between the white display and the black display. Figure 18 shows a 4-point grid. Here, the display content of the S 1 segment electrode is the same as the display content of the S 1 segment electrode. Since there is no potential difference between the two electrodes that cause a short circuit, no abnormal display occurs. Next, an example is shown in which an electrode short circuit occurs on the electrode connecting the S3 segment electrode and the S7 segment electrode. On this panel, there are 1-point grid display, 2-point grid display, 3-point grid display, and 4-point grid display in order. Figure 19 shows a one-point grid display. Figure 20 shows a 2-point grid. Figure 21 shows a 3-point grid. In the three display patterns, the display content of S3 segment electrode is the same as the display content of S7 segment electrode (11) (11) 200401132. Because there is no potential difference between the two electrodes that cause a short circuit, no abnormal display D is generated. Figure 22 is a 4-point grid. Here, the display content of the S 3 segment electrode is different from the display content of the S 7 segment electrode. The short-circuit current flows through the short-circuited portion, and the voltage applied to the segment electrode becomes a gray display between the white display and the black display. Based on the above-mentioned embodiments, when η is a natural number and m is an integer of 0 or more, an inter-line short circuit sandwiched between the (n-1 + mn) lines in the η-point grid display can be detected. That is, a short circuit between an even-numbered line and an odd-numbered line in a 1-point grid display can be detected. A short-circuit between adjacent lines that sandwiches (1 + 2 m) lines between the lines in the 2-point grid display 3. Short-circuit between adjacent lines between (2 + 3 m) lines between the lines in the 3-point grid display. The same is true when N is 5 or more. Therefore, when displaying the 1-point grid, the 2-point grid, the 3-point grid, and the 4-point grid out of order, you can detect a short circuit between individual adjacent lines, and clamp between lines. Yes] Short circuit between two lines of two wires, Short circuit between two lines of three wires between three wires, Short circuit between four lines of three wires between wires. Further, another example of the second display screen having the same effect as the second display screen is shown in Figs. 10 and 1]. (Second Embodiment) A second embodiment will be described with reference to Fig. 1. In the first figure, area 5 is displayed as a one-point grid. Field ό shows a 2-point grid display. Field 7 displays a 3-point grid. Field 8 displays a 4-point grid. When displayed in this way, the short circuit of the electrodes described in the first display -16-(12) (12) 200401132 to the fourth display screen can be detected together. The liquid crystal display panel generally displays the display screen in a line sequential scanning mode. Therefore, there are five times for displaying one screen: (1) time for displaying the image display section, (2) time for displaying the 1-point grid display section, (3) time for displaying the 2-point grid display section, (4) Time to display the 3-point grid display section, (5) Time to display the 4-point grid display section. Therefore, on a plurality of display patterns, the data line signals to be switched in each display pattern are switched in the same display pattern at the time of (2) to (5) above. In addition, examples of other display screens of the second embodiment are shown in FIGS. 12 and 13. [Effects of the Invention] According to the present invention described above, when the electrodes of the image display section are short-circuited, when the display state of the viewing point matrix display section is used instead of the image display section, short circuits can be detected without having to sequentially By displaying the image display unit on the ground, it is possible to perform a display check in a short time and with minimal omissions. [Brief Description of the Drawings] Fig. 1 is a diagram showing an example of a second embodiment of the present invention. Fig. 2 is a diagram showing a liquid crystal panel in the first embodiment of the present invention. Fig. 3 is a detailed diagram of an image display portion of the liquid crystal panel in the first embodiment of the present invention. Fig. 4 is a detailed view of another (13) (13) 200401132 image display section of the liquid crystal panel in the first embodiment of the present invention. Fig. 5 is a diagram showing a display order of inspection by the image display section of the prior art. Fig. 6 is a diagram showing an example of a first display screen in the first embodiment of the present invention. Fig. 7 is a diagram showing an example of a second display screen in the first embodiment of the present invention. Fig. 8 is a diagram showing an example of a third display screen in the first embodiment of the present invention. Fig. 9 is a diagram showing an example of a fourth display screen in the first embodiment of the present invention. Fig. 10 is a diagram showing another example of the second display screen in the first embodiment of the present invention. Fig. 11 is a diagram showing another example of the second display screen in the first embodiment of the present invention. Fig. 2 is a diagram showing another example of the second embodiment of the present invention. Fig. 13 is a diagram showing another example of the second embodiment of the present invention. Fig. 14 is a list of possible combinations for inspection. Fig. 15 is a diagram showing an example of a first display screen when an electrode short circuit occurs in the first embodiment of the present invention. Fig. 16 is a diagram showing an example of abnormal display on the second display screen when an electrode short circuit occurs in the first embodiment of the present invention. -18- (14) (14) 200401132 The first] Figure 7 shows the first of the present invention! An example of an abnormal display on the third display screen when an electrode short circuit occurs in the embodiment. Fig. 8 is a diagram showing an example of a fourth display screen when an electrode short circuit occurs in the first embodiment of the present invention. Figure 19 shows the first of the invention! An example of the first display screen when other electrodes are short-circuited in the embodiment. Fig. 20 is a diagram showing an example of a second display screen when other electrodes are generated in the first embodiment of the present invention. Fig. 21 is a diagram showing an example of the third display screen when the other electrodes are short-circuited in the first embodiment of the present invention. Fig. 22 is a diagram showing an example of a fourth display screen when another electrode short circuit occurs in the first embodiment of the present invention. Fig. 23 is a detailed view showing a common electrode junction of a liquid crystal panel in the first embodiment of the present invention. Fig. 24 is a diagram showing the details of the β-nodes of the electrode wires of the liquid crystal panel in the first embodiment of the present invention. · Component symbol comparison table 1: Image display section 2 = Dot matrix display section 3 = Data line 4: Image segment 5 = Display 〖Dot grid display area 6 = Show 2-point grid display area -19- ( 15) (15) 200401132 7: Display area with 3-point grid display 8: Display area with 4-point grid display 9: S 1-S 1 Short-circuit between 1-segment electrodes] 0: S 3-S 7-segment electrode Short circuit
2020