4 3 8 9 9 0 a? _____B7 五、發明説明（） 5-Ί發明領域： 本發明係關於一種能加快測試速度於LCD電位之裝 置與方法’同時亦除去習知技藝中附.加電容的後用，與減 少ί/Ο pad之數目，在測試速度加快之時，同時亦提昇成 本效率。 S_2發明背景： 第_8圖爲一具有LCD堪動電路之單晶片内部電路方 塊圖。該圖中包舍下列基本單元：微處理器 (Microprocessor)801 、 LCD 隨機存取記憶體 (RAM)802、LCD 切換邏輯（Switching L9gic)803、LCD 偏廢電位羞生器（Bias Voltage Generator)804。 經濟部中央標準局貝工消費合作社印製 冊 ,* (請先閱讀背面之注意事項再填寫本頁) 微處理器801將要顯示之資料透過位址匯流排 ADDR，及資料匯流排DAtA寫入LCD RAM 802。LCD 切換邏輯803則接收LCD RAM 802輸出的顯示資料，轉 換成共同信號（Common signa丨）COMx與段信號（Segment signal)SEGx，用以驅動LCD顯示暮。COMx以及SEGx 訊號的波形如第6圖所示，其電俘是由LCD偏壓電位產 生器804所提供，也就是LCD切換遥輯803針對LCD RAM 802的資料，將SEGx切換到不同的電位。 本紙張尺度適用中國國家標準（CNS ) A4规格（210X297公釐〉 A7 4389 9 0 五、發明説明（） 一艇而言，LCD偏壓電位產生器804中電位的產 生，多採用電壓分壓的方式；爲減少該分壓的直流（Direct Current，DC)電流，又以較大電阻構条該分壓電路者爲 多。但如此一來，動態電流供應就會不足，因而又增加附 加電容以爲穩壓，提供該LCD波形（Waveform)切換時的 瞬間電流》 爲進一步纬省成本，將LCD之穩壓電容省去，同時 亦略去其梱關之丨/Opad ;但如此一來，LCD產生的尖峰 (Spike)便增加° —簡單的作法是降低分壓電阻値，如此 便能動態地供應較多之電流，使LCD波形（Waveform)的 S p i k θ減少，並得以增加該L C D的品質。又爲了減少分壓 電阻之直流耗電，該分壓電阻不能太小，但同時卻造成測 試時無法用更高速之切換速度來縮短測萬時間。 此外，一般在測試之時，多會使用一較快的時鐘信 號，用以加快測試的速度，降低測試成本。但若LCD的 驅動力不足，則加快時鐘信號亦枉然。在先前技術中，由 於偏壓電位可於測試時，由測試機台電壓源直接提供足夠 的驅動電流’然在節省 C接脚後，l c b的偏壓即無法再 由外界提供，因此也造成測試之時速度無法加快的問題。 第1圖描述的是先前技術之LCD偏壓電位產生器804 之電路方塊圖。該電路圖包含下列基本元件：LCD驅動 本紙張尺度適用中國國家擦準（CNS ) A4規格（210X297公费） —；--^---^---广'裝-- (請先閱讀背面之注意事項再填寫本頁) -訂 經濟部中央標準局員工消費合作社印製 4 3 8 9 9 0 A7 B7 五、發明説明（） I-——“：——L---，裝丨_ (諳先閱讀背面之注意事項再填寫本頁) 電路（LCD driver circuit” 01 ;共同信號輸出端102 ;段 信號輸出端103;輸出入接腳（丨/Opad)104、105、106、 與107 ;附加電容C"、C12、Ci3、和C14 ;分壓電阻 Rii、R12、R13、R14、與 R15，其電阻値皆爲 100ΚΩ; 以及一電壓源Vcc，提供一電壓用尽產生分壓；另繪出四 個電壓分壓點Vn、v12、v13、和V14，用以提供分壓給 LCD驅動電路1 〇 1。在測試時，可利用一外加電源，經由 l/OPad104~107 外灌 Vn、V12、V13、和 之偏壓値； 因爲是外加電源，所以能提供極大的勤態電流。 傳統的LCD電路利用電阻產生分壓的方式，來產生 電位於上述之分壓點V1t' V12、V13、和V14。但在實用 上不希望流經該分壓電阻的直流電流過大，囡而上述之分 壓電阻皆擁有較大的電阻値；然如此一來，動態的電流供 應即會不足。因此，傳統的方法是利用外加電容來做偏壓 .電位的穩壓之用。 經濟部中央標準局員工消費合作社印製 第6圖描述的是B-type LCD驅動器產生的棟形圖， 該圖中繪出第一共同信號輸出（以“COM 1 ”代表之）、第二 共同信號輸出（以‘‘QO M2”代表之）、第三共同信號輸出（以 “ C Ο Μ 3”代表之）、以及相對應的段信號輸出（以“ S E G X”代 表之卜上述各點並由電壓源Vcc、電壓分壓點"η、V”、 V! 3、V，4、與接地端G N D取出電位値。 本紙浪尺度適用中國國家標準（CNS ) A4規格（210X297公釐） A7 438990 _______B7__ 五、發明説明（）4 3 8 9 9 0 a? _____B7 V. Description of the invention (5) Field of invention: The present invention relates to a device and method capable of accelerating the test speed at the LCD potential. At the same time, it also removes the capacitor attached to the conventional technique. After use, and reducing the number of ί / Ο pad, when the test speed is accelerated, it also improves cost efficiency. S_2 Background of the Invention: Figure _8 is a block diagram of a single chip internal circuit with an LCD movable circuit. The figure includes the following basic units: Microprocessor 801, LCD random access memory (RAM) 802, LCD switching logic (Switching L9gic) 803, LCD bias voltage generator (Bias Voltage Generator) 804. Printed by the Central Standards Bureau of the Ministry of Economic Affairs of the Shellfish Consumer Cooperative, * (Please read the precautions on the back before filling this page) The microprocessor 801 writes the data to be displayed to the LCD through the address bus ADDR and the data bus DAtA RAM 802. The LCD switching logic 803 receives the display data output from the LCD RAM 802 and converts it into a common signal (Common signa) COMx and a segment signal (SEGx) to drive the LCD display. The waveforms of the COMx and SEGx signals are shown in Figure 6. The electric traps are provided by the LCD bias potential generator 804, which is the data of the LCD switching remote edit 803 for the LCD RAM 802, which switches SEGx to different potentials. . This paper scale applies Chinese National Standard (CNS) A4 specification (210X297mm> A7 4389 9 0 V. Description of the invention () For a boat, the voltage generated in the LCD bias potential generator 804 is mostly voltage divided. In order to reduce the direct current (DC) current of the divided voltage, it is more to structure the voltage dividing circuit with a larger resistance. But in this case, the dynamic current supply will be insufficient, and therefore additional The capacitor is supposed to stabilize the voltage and provide the instantaneous current when the LCD waveform (Waveform) is switched. In order to further save costs, the voltage stabilizing capacitor of the LCD is omitted, and its barriers are also omitted. However, as a result, The spike generated by the LCD will increase by °. The simple method is to reduce the voltage-dividing resistor 値, so that it can dynamically supply more current, so that the S pik θ of the LCD waveform (Waveform) is reduced, and the quality of the LCD can be increased. In order to reduce the DC power consumption of the voltage-dividing resistor, the voltage-dividing resistor cannot be too small, but at the same time, it is impossible to use a higher switching speed to shorten the measurement time during the test. In addition, during the test, it is often A faster clock signal is used to speed up the test and reduce the test cost. However, if the driving force of the LCD is insufficient, the clock signal is also accelerated. In the prior art, because the bias potential can be changed during the test, The test machine's voltage source directly provides sufficient drive current. However, after saving the C pin, the bias voltage of the LCD can no longer be provided by the outside world, which also causes the problem that the speed cannot be accelerated during testing. Figure 1 depicts the previous The circuit block diagram of the LCD bias potential generator 804 of the technology. The circuit diagram contains the following basic components: LCD drive This paper size is applicable to China National Standard (CNS) A4 specification (210X297 public expense) —;-^ --- ^ --- Guang 'equipment-(Please read the precautions on the back before filling out this page)-Order printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 4 3 8 9 9 0 A7 B7 V. Description of the invention () I-— — ": —— L ---, install 丨 _ (谙 Read the precautions on the back before filling this page) Circuit (LCD driver circuit) 01; common signal output terminal 102; segment signal output terminal 103; output input pin (丨 / Opad) 104, 105, 106, and 107; additional capacitors C ", C12, Ci3, and C14; voltage dividing resistors Rii, R12, R13, R14, and R15, all of which have a resistance of 100KΩ; and a voltage source Vcc, which provides a voltage exhaustion to generate a divided voltage; Four voltage division points Vn, v12, v13, and V14 are also drawn to provide the divided voltage to the LCD drive circuit 101. During the test, an external power supply can be used to inject Vn via l / OPad104 ~ 107 , V12, V13, and the bias voltage 値; Because it is an external power supply, it can provide a great current. The conventional LCD circuit uses a resistor to generate a divided voltage to generate electricity at the above-mentioned divided voltage points V1t 'V12, V13, and V14. However, in practice, it is not desirable that the DC current flowing through the voltage dividing resistor is too large, and the above voltage dividing resistors each have a large resistance; however, the dynamic current supply will be insufficient. Therefore, the traditional method is to use an external capacitor to do the bias voltage stabilization. Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs. Figure 6 depicts the block diagram generated by the B-type LCD driver. The figure shows the first common signal output (represented by "COM 1"), the second common The signal output (represented by "QO M2"), the third common signal output (represented by "C OM 3"), and the corresponding segment signal output (represented by "SEGX") The voltage source Vcc, the voltage dividing point " η, V ", V! 3, V, 4, and the potential GND are taken out from the ground terminal GND. The paper wave scale is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) A7 438990 _______B7__ 5. Description of the invention ()
由於上述之電壓源與電壓分壓點同時間中，必須提供 許多段信號之電流，又因爲LCD RAM所存放之資料内容 無珐預測（顯示於螢幕上之圖點資料爲不停變更的），該處 的負載亦不斷變動，所以該處之電壓位準亦不穩定，而在 LCD切換時將產生Spike之現象Q此外，由於上述分壓電 阻加大後亦會減少動態電流之供應；所以，習知的LCD 電路皆會附加一些附加電容（即011、〇12、〇13、和〇14)， 以提供動態電流及作爲穩壓之用，俾使該分壓點之電聲位 準不會變動過多，並提供較大之動態驅動電流，降低CO Mx 與.SEGx 的 Spike。 然而，對於低價位之掌上型（Handheld)LCD遊樂器 而言’該附加電容會增加材料成本，而該電容所增加的 1/0口3〇1亦使組裝成本增加，甚至在接脚限制（1^€|_1丨〇^) 之下，阻礙採用先進製程以降低積體電路（丨ntegrated c丨rcuit,丨C)的成本所以，如何減.少上述之電容，以降低 材料成本與組裝費用，並在I/O pad減少使用的情形之 下，仍可抹用更先進的製程以降低丨c成本，即成爲—相 當重要之課題。 5·3發明目的及概述： 鑒於上述之發明背景中，針對LCD爲了降低成本將 附加電容除去，以及減少丨C接腳的方式，造成測試逡度 本紙張尺度適用中國國家標準（CNS ) A4规格（.2Ι〇χ297公後） (請先閲讀背面之注意事項再填寫本頁) .裝. 經濟部中央標準局貝工消費合作社印製 A7 B7 438990 五、發明説明（） 無法提昇之困境，因而亟需對上述之LCD電路做改良。 本發明之目的即在提供一種可加快測試速度的LCD電壓 產生方法，用以克服上述之問題；可以將電阻内建於 c 内部，節省彳/0 pad，同時亦能節省測試時間，降低成本。 本發明的另一目的爲只有在測試時，爲加快測試L c D 需要更多的動態電流.之時’才提供一較原來電阻分壓更多 的動態電流，以避免平時消耗過多的直流耗電。 根據以上所述之目的，本發明提供了，種能於測試 L C D電位時，加快測試速度的裝置，包含複數個電阻以 產生偏壓、複數個切換裝置於測試時於該電阻間切換、以 及一測試模式信號產生裝置，用以產生测試所需之切換信 號。 本發明提供之加快測試速度的方法包括下列步驟：先 利用一組電阻以分壓方式產生LCD電位；在利用上述之 切換裝置控制該電組之旁路或並聯；最後使該受控之電阻 產生較習知技術爲大的動態驅動電流（Driving current)， 以提供給LCD電路。 (請先閱讀背面之注意事項再填寫本頁〕 .裝- 經濟部中央標準局貞工消費合作社印製 明 説 單 簡 式 圖 下 以 輔 中 字 文 明 説 之 後 往 於 將 例：施述 實闡 佳的 較細 的詳 明更 發做 本形 圖 列 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公釐） ^ 4 3 8 9 9 0 at Β7 經濟部中央標準局員工消費合作社印製 五、發明説明（） 第1圈爲習知技藝中之LCD電位電路圖； 第2圖爲本發明較佳實施例之電路方塊圈； 第3闺爲本發明第二個較佳實施例之電路方塊圖； 第4圖爲本發明第三個較佳實施例之電路方塊圖； 第5圏爲一習知的傳輸閘（Transmission gate); 第6圖爲一習知之B-type LCD驅動器（Driver)產生的波形 _ (Waveform); 第7八圖描述無負載（1^〇丨〇3(1)，且分壓電阻爲10(^〇情 形時之LCD波形圖； 第7B圖描述分壓電阻爲1〇〇 ΚΩ之LCD波形圖； 第7C圖描述分壓電阻爲50 ΚΩ之LCD波形國； 第7D圏描述分壓電阻25ΚΩ之LCD波形圖；及 第8囷爲習知的LCD電路方塊圖。 5·5發明詳細説明·· 本發明之較佳實施例將於此後闞述之。 第2圖描述本發明的第一個較佳實施例，圖中繪出該 較佳實施例之電路方塊圖。該電路圖包含下列基本元件： LCD驅動電路101 ;共同信號輸出端1〇2 ;段信號輸出端 103 ;切換開關 201、202、203、204、輿 205 ;分壓 電阻 R201、R202 ' R203、R204 ' R205 ' R206 ' R207 ' R 2 0 8、R 2 0 9、與 R 2 1 0，其中 R 2 0 1、R 2 0 2、R 2 0 3、R 2 0 4、 R205 分别與 R2O6、R207、R2O8、R209、與 R210 呈並聯連 (請先閲讀背面之注意事項再填寫本頁) 裝. 、1Τ 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） 經濟部中央標準局員工消費合作社印製 43 899 0 A7 _ B7 五、發明説明（） 接；一測試信號輸入端（Stest);以及一電壓源vcc，提供 一電壓用以產生分壓；另繪出四個電壓分壓點V21、v22、 v23、和V24’用以提供分壓給LCD驅動電路101。 上述之基本元件中，LCD驅動電路1〇1、共同信號 輸出端102、與段信號輸出端1〇3，皆與第1圖所描述之 習知技藝相同。分壓電阻R?01、R2()2、、r2()4、r2()5 之電阻値皆鳥 20KQwr2()6、r2〇7、R2〇8、r2〇9、r2i〇 之電阻値皆爲2ΚΩ 。事實上，上述之分壓電阻r2(m、 R2!)2、R2 03、R20 4、R2〇5之電阻値可碼外接LCD顯示幕 之大小（即外接之電容性負載）而定，一般約在 20ΚΩ-1 00ΚΩ 之間。 實際操作情形爲，先利用分壓電阻R2〇t、 R2〇2、 R203、只2〇4、R2〇5產生分壓，此時切換開關201、202、 203、204、與205呈開啓（〇pen)狀態，使分壓電阻R2〇e、 R207、R208、R209、R21〇 爲浮接（p|0ating>狀態。當測試 模式開始，亦即一測試信號$test啓動（Enable)時，將驅 動上述之切換開關201、202、203、204、與205呈關 閉（Close〉狀態，同時使得分壓電阻r2〇i、R2〇2、R2〇3、 R204、R2〇5 分别與電阻 R2〇e、R2〇、r2()8、r2()9、r21() 並聯，產生一較原來爲小的之電阻値；如此一來，所能提 供的動態驅動電流較習知技術所能提供者爲大。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) ;ηι_ 訂- 43 89 9 0 五、發明説明（） A7 B7 第 3圖描述本發明第二個較佳實施例的電 路方塊 圖 〇 該 電路圖 包含下列基本元件：丨 LCD驅 動電路 101 ； 共 同 信 號輸出 端102;段信號輸出端 1 0 3 ;分壓電阻 R 3 0 1、 R302 \ R303、 R 3 0 4、R 3 0 5、R 3 0 6、 R3 07、 R308、 R309、 與 R 3 1 0 ，其中 R 3 0 1 % Rs〇3、 R305 ' ‘ R3 0 7 、R309 分别輿 r3 0 2 R304 ' R3O6、R3O8、與 呈串聯 連接； 切換開 關 301 、302 、303、304、與 305 ’分别 與電阻 R302 ' R304 、 R 3 0 6 ' R 3 0 8、以及R 3 1 0呈並 聯連接 ;二測 試信號 輸 入 端 (Stest) ;以及一電壓源vcc， 提供一 電壓用 以產生 分 壓 9 另繪出 四個電壓分壓點v31、 V32、 V33、和 V34， 用 以 提 供分壓 給LCD驅動電路101 〇 上 述之基 本元件中，LCD驅動 電路101、共 同信號 輸 出 端 102、 與段信號輸出端103， 皆與第 1圖所 描述之 習 知 技 藝相同 。分壓電阻R301、只303 、R305 、R 3 0 7 ' R 309 之 電 阻 値皆爲 2ΚΏ 〗而 R302、R304 、R306 Λ R308 、R310 之 電 阻 値皆爲 18ΚΩ - ^1- nn ^^^1 m fl^i tin V \ V - , ·· $-e (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作社印製 在實際操作上’先利用分壓'電阻R301、R302、R303、 R 3 〇 4 ' R 3 0 5 ' R3O6、只3。7、R308、闩3。9.、與 R31。產生分 壓，此時切換開關301 、302、303、304、與305呈 Open狀態。當測試模式開始，亦即一測試信號Stest啓動 時，將驅動上述之切換開關301、502、303、304、與 305呈Close狀態，同時使得分壓電阻R302、 R3〇4、 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 438990 A7 B7 五、發明説明（） R306、R308、R31 〇 分别被旁路（B y p a s s > (亦即電流不再流 經該電阻），由於分壓電阻產生較原來爲小；因此，能提 供的動態驅動電流亦較習知技術所能提供者爲大。 第4圖描述本發明第三個較佳實施例的電路方塊 崮。該電路圖包含下列基本元件：LCD驅動電路1〇1 ; 共同信號輸出端102;段信號輸出端103;分壓電阻R4l、 R42、R43、R“ 與 R45 ;切換開關 401 、402、403、 404、與405，分别與電阻FUi、R42、R43、R44、以及 R45呈並聯連接；一測試信號輸入端<Stest);以及一電壓 源Vcc，提供一電壓用以產生分壓；另繪出四個電壓分壓 點 V41、V42、V43、和 。 上述之基本元件中，LCD驅動電路101、共同信號 輸出端102、與段信號輸出端103，皆與第1圖所描述之 習知技藝相同。分廢電阻R41、R42、R43、R44、R45之 電阻値皆爲20 ΚΩ。上述之切換開關401、402、403、 404、與405則利用第5圖所描述之Transmission ate 所構築，該傳輸閘之通道（Channel)長度較習知者爲長， 且内阻調整爲2ΚΩ 在實際操作上，先利用分壓電阻、R42、R43、 R “、與R45產生分壓，此時切換開關401、402、403、 404、與405呈Open狀態。當測試模式開始，亦即—測 本紙張尺度適用中國國家標準（CNS ) A4規格（2!0X297公釐） Ί... I.--ί--L---裝丨— (請先聞讀背面之注意事項再填寫本頁) "tv 經濟部中央標準局員工消費合作社印製 ^3899 0 A7 B7 五、發明説明（） 經濟部中央標準局員工消費合作社印製 試信號Stest啓動時，將驅動上媒之切換開關401~405皆 呈Close狀態，同時使得分壓電阻r4i、r42、r43、r44、 R“分别和切換開關401〜405之内阻並聯，產生較小之分 壓電阻。由於分壓電阻產生較原來爲小，囡此，所能提供 的動，態驅動電流亦較.習知技術所提供者爲大β 事實上，由第5圖描述之傳輸閘所組成的切換開關 401、402、403、404、與405即已等效取代第2圖_， 切換聞關201、202、203、204、與205，以及分壓電 阻 R20&、R2Q7、R208、r2〇s、r2i〇 之作用。因此，在非 測試模式時’各分壓點之間所存在之電阻値爲2 0 Κ Ω ;然 而，在測試模式時，各分壓點之間所存在之電阻値約爲 Ί.8ΚΩ’與第2圖之實際運作情形完全相同。 第7Α、7Β、7C、與7D圖利用波形圖，來描述一 些實驗結果。第7Α圖描述的是無負載時，LCD的波形 圖’第7B、7C、與7D圖則是用來説明在LCDPannel 具相同負载時’不同的分壓電阻所產生的波形圖。 第7A圖所描述的是在無負載下LCD之顯示波形（以 SEGx與COM6爲例）。該圖，所示之波形圖十分良好，尖 峰信號甚少。第7B圖描繪的是外加LCD顯示幕後（有負 載>’該LCD電路之分壓電阻値爲1〇〇ΚΩ時，LCD所輸 出之波形圖（以“ S EGx與C Ο Μ 3”爲例）。由該圖可知，在高 11 木紙張尺度適用中國國家標率（CNS ) Α4規格（2:0X297公釐） J ; K---ο裝-- (請先閲讀背面之注意事項再填寫本頁) ·訂 ^38990 五、發明說明（ A7 B7 f 1·補尤 電阻値之下’所產生之Spike相當明類。第7C圖所描述 的疋’該LCD電路分壓電阻値爲50ΚΩ時的顯示波形（以 “SEGx與COM4”爲例〉。該圖所示波形囷之Spike，已較 第7B圖所示者爲少。第7D圖描繪的是該|_CD電路之分 壓電阻値爲25ΚΩ時，LCD所輸出之波形圖（以"SeGx與 COM3”爲例 >。很明顯的該.圖之spike更爲減少，呈現十 分理想的Waveform。所以，使用較小之分譽電阻時，將 可獲得具較小Spike之較佳Waveform。 以上所述僅爲本發明之較佳實旅例而已，並非用以限 定本發明之申請專利範圍；凡其它未脱離本發明所揭矛之 精神下所完成之等效改變或修飾，均應包含在下述之申請 專利範園内。 經濟部智慧財產局員工消費合作杜印製 主要部份之代表符號： 10 1 L C D驅動電路 10 2 共同信號輸出端 10 3 段信號輸出端 104、105、Ί 06 ' 1 07 20 1、202、203、204、205 30 1、302、303、304、305 401、402、403、404、405 80 1 微處理器 802 LCD隨機存取記憶體 803 LCD切換邏輯 804 LCD偏壓電位產生器 輸出入接腳 切換開關 切換開關 切換開關 ：----r-------Ο 裝--------訂---T------_ .(請先閱讀背面之注意事項再填寫本頁) 12 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐）Because the voltage source and the voltage division point mentioned above must provide many signal currents at the same time, and because the data content stored in the LCD RAM has no enamel prediction (the picture point data displayed on the screen is constantly changing), The load at this place is also constantly changing, so the voltage level there is also unstable, and a Spike phenomenon will occur when the LCD is switched. In addition, the supply of dynamic current will be reduced after the above-mentioned voltage dividing resistor is increased; therefore, Conventional LCD circuits will add some additional capacitors (ie, 011, 〇12, 〇13, and 〇14) to provide dynamic current and use as a voltage regulator, so that the electrical sound level of the voltage division point will not be Too much variation, and provide a large dynamic drive current, reducing the Spike of CO Mx and .SEGx. However, for a low-cost Handheld LCD game instrument, 'the additional capacitor will increase the cost of materials, and the added 1/0 port 301 of the capacitor also increases the assembly cost, even at the pin limit. (1 ^ € | _1 丨 〇 ^), hinder the use of advanced processes to reduce the cost of integrated circuits (丨 ntrcuit, 丨 C), so how to reduce. Reduce the above capacitors to reduce material costs and assembly Costs, and in the case of reduced use of I / O pads, you can still use more advanced processes to reduce the cost of c, that is-a very important issue. 5.3 Purpose and summary of the invention: In view of the above-mentioned background of the invention, in order to reduce the cost of the LCD to reduce the additional capacitance and reduce the 丨 C pin, resulting in testing the test paper size of this paper applies Chinese National Standard (CNS) A4 specifications (After 2 〇〇297297) (Please read the notes on the back before filling out this page). Equipment. Printed by the Shellfish Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs, printed A7 B7 438990 5. Inventive note () The dilemma that cannot be improved, so There is an urgent need to improve the above LCD circuit. The purpose of the present invention is to provide an LCD voltage generating method that can speed up the test speed to overcome the above-mentioned problems. The resistor can be built in c to save 彳 / 0 pad, meanwhile, it can save test time and reduce cost. Another object of the present invention is to provide more dynamic current than the original resistance divider voltage only when testing, in order to speed up the test of L c D. At that time, to avoid excessive consumption of DC current Electricity. According to the above-mentioned object, the present invention provides a device capable of accelerating the test speed when testing the LCD potential, comprising a plurality of resistors to generate a bias voltage, a plurality of switching devices switch between the resistors during testing, and The test mode signal generating device is used for generating a switching signal required for testing. The method for accelerating the test speed provided by the present invention includes the following steps: firstly generating a LCD potential in a divided voltage manner by using a group of resistors; using the aforementioned switching device to control the bypass or parallel connection of the electric group; and finally generating the controlled resistance A more conventional technique is a large driving current to provide the LCD circuit. (Please read the notes on the back before filling in this page.)-Equipment-printed by the Central Standards Bureau of the Ministry of Economic Affairs, Zhenggong Consumer Cooperatives, and printed with a simplified diagram supplemented by the Chinese civilization civilization. Detailed and detailed descriptions are made in the form of a chart. The paper size is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) ^ 4 3 8 9 9 0 at Β7 Printed by the Staff Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs Explanation of the invention () The first circle is a circuit diagram of the LCD potential in the conventional art; the second circle is a circuit block circle of a preferred embodiment of the present invention; the third circle is a circuit block diagram of a second preferred embodiment of the present invention; Fig. 4 is a circuit block diagram of a third preferred embodiment of the present invention; Fig. 5 is a conventional transmission gate; Fig. 6 is a conventional B-type LCD driver (Driver) Waveform (Waveform); Figure 7-8 describes the LCD waveform when no load (1 ^ 〇 丨 〇3 (1), and the voltage divider resistance is 10 (^ 〇); Figure 7B describes the voltage divider resistance is 1〇 〇KΩ LCD waveform chart; Figure 7C describes the voltage dividing resistor is 50 κΩ LCD waveform country; Section 7D 圏 describes the LCD waveform diagram of the voltage-dividing resistor 25KΩ; and Section 8 囷 is a conventional LCD circuit block diagram. 5 · 5 Detailed description of the invention ·· The preferred embodiments of the present invention will be described later Figure 2 describes the first preferred embodiment of the present invention, and the circuit block diagram of the preferred embodiment is drawn in the figure. The circuit diagram includes the following basic components: LCD driving circuit 101; common signal output terminal 102; Segment signal output terminal 103; changeover switches 201, 202, 203, 204, and 205; voltage dividing resistors R201, R202, R203, R204, R205, R206, R207, R 2 0 8, R 2 0 9, and R 2 1 0, where R 2 0 1, R 2 0 2, R 2 0 3, R 2 0 4, and R205 are connected in parallel with R2O6, R207, R2O8, R209, and R210 (please read the precautions on the back before filling in this Pages), 1T This paper size applies to Chinese National Standard (CNS) A4 specifications (210X297 mm) Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 43 899 0 A7 _ B7 V. Description of the invention () Connect; a test signal An input terminal (Stest); and a voltage source vcc, providing a voltage for generating a divided voltage; Four voltage division points V21, v22, v23, and V24 'are also provided to provide the divided voltage to the LCD driving circuit 101. Among the above-mentioned basic components, the LCD driving circuit 101, the common signal output terminal 102, and the segment The signal output terminal 103 is the same as the conventional technique described in FIG. 1. Resistance of voltage dividing resistors R? 01, R2 () 2, r2 () 4, r2 () 5 are all 20KQwr2 () 6, r207, R208, r209, r2i0 are all resistances Is 2KΩ. In fact, the resistance of the above-mentioned voltage dividing resistors r2 (m, R2!) 2, R203, R204, and R205 can be determined by the size of the external LCD display screen (that is, the external capacitive load), which is generally about Between 20KΩ-1 00KΩ. The actual operation situation is to first use the voltage-dividing resistors R20t, R202, R203, and only 204 and R205 to generate the divided voltage. At this time, the switches 201, 202, 203, 204, and 205 are turned on (〇 pen) state, the voltage-dividing resistors R2〇e, R207, R208, R209, and R21〇 are in a floating (p | 0ating > state. When the test mode starts, that is, a test signal $ test is enabled (Enable), it will drive The above-mentioned changeover switches 201, 202, 203, 204, and 205 are in the Close state, and at the same time, the voltage dividing resistors r2oi, R2202, R2O3, R204, R2O5, and R2oe, R2〇, r2 () 8, r2 () 9, r21 () are connected in parallel to generate a smaller resistance than the original 値; in this way, the dynamic driving current that can be provided is larger than that provided by conventional technologies The paper size applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) (please read the precautions on the back before filling this page); η 订-43 89 9 0 V. Description of the invention () A7 B7 Figure 3 A circuit block diagram describing a second preferred embodiment of the present invention. The circuit diagram includes the following basic components: LCD drive Circuit 101; common signal output terminal 102; segment signal output terminal 1 0 3; voltage dividing resistors R 3 0 1, R302 \ R303, R 3 0 4, R 3 0 5, R 3 0 6, R3 07, R308, R309 , And R 3 1 0, among which R 3 0 1% Rs〇3, R305 '' R3 0 7, R309 are respectively connected in series with r3 0 2 R304 'R3O6, R3O8, and are connected in series; switch 301, 302, 303, 304 , And 305 ′ are connected in parallel with the resistors R302 ′ R304, R 3 0 6 ′ R 3 0 8, and R 3 1 0; two test signal input terminals (Stest); and a voltage source vcc to provide a voltage for Generate voltage divider 9 In addition, draw four voltage divider points v31, V32, V33, and V34 to provide the voltage divider to the LCD drive circuit 101. Among the above basic components, the LCD drive circuit 101, the common signal output terminal 102, The segment signal output terminal 103 is the same as the conventional technique described in Fig. 1. The resistances of the voltage dividing resistors R301, 303, R305, and R 3 0 7 'R 309 are all 2K Ώ and R302, R304, and R306. Λ The resistance R of R308 and R310 is 18KΩ-^ 1- nn ^^^ 1 m fl ^ i tin V \ V-, ·· $ -e (Please read the precautions on the back before filling this page) Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 'Use the voltage divider first' resistors R301, R302, R303 , R 3 〇4 'R 3 0 5' R3O6, only 3.7, R308, latch 3. 9., and R31. A divided voltage is generated, and the switches 301, 302, 303, 304, and 305 are in the Open state at this time. When the test mode starts, that is, when a test signal Stest is activated, the above-mentioned switching switches 301, 502, 303, 304, and 305 will be driven to the Close state, and the voltage divider resistors R302, R304, and the paper size are applicable to China. National Standard (CNS) A4 specification (210X297 mm) 438990 A7 B7 V. Description of the invention () R306, R308, R31 〇 Bypass (Bypass > (that is, the current no longer flows through the resistor), because The piezoresistance is smaller than the original; therefore, the dynamic driving current that can be provided is larger than that provided by conventional technologies. Figure 4 depicts the circuit block 崮 of the third preferred embodiment of the present invention. The circuit diagram includes the following Basic components: LCD drive circuit 101; common signal output terminal 102; segment signal output terminal 103; voltage dividing resistors R4l, R42, R43, R "and R45; switch 401, 402, 403, 404, and 405, respectively Connected in parallel with resistors FUi, R42, R43, R44, and R45; a test signal input terminal <Stest); and a voltage source Vcc to provide a voltage to generate a voltage divider; and draw four voltage divider points V41, V42, V43 Among the above-mentioned basic components, the LCD driving circuit 101, the common signal output terminal 102, and the segment signal output terminal 103 are the same as the conventional techniques described in Fig. 1. Waste resistors R41, R42, R43, R44 The resistance 値 of R45 and R45 are 20 Ω. The above-mentioned changeover switches 401, 402, 403, 404, and 405 are constructed by using the Transmission ate described in Figure 5. The channel length of the transmission gate is longer than that of a conventional person. It is long and the internal resistance is adjusted to 2KΩ. In actual operation, first use the voltage-dividing resistors, R42, R43, R ", and R45 to generate a voltage divider. At this time, the switches 401, 402, 403, 404, and 405 are in the Open state. . When the test mode starts, that is, the paper size of this test applies to the Chinese National Standard (CNS) A4 specification (2! 0X297 mm)） ... I .-- ί--L --- 装 丨 — (Please first (Please read the notes on the back and fill in this page) " tv Printed by the Consumers 'Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs ^ 3899 0 A7 B7 V. Description of the Invention () When the test signal Stest printed by the Consumers' Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs is started, The switching switches 401 to 405 driving the medium are all in the Close state, and at the same time, the voltage dividing resistors r4i, r42, r43, r44, and R "are connected in parallel with the internal resistances of the switching switches 401 to 405, respectively, to generate smaller voltage dividing resistors. Because the voltage-dividing resistor is smaller than the original, the dynamic and state-driven current that can be provided is relatively large. The conventional technology provides a large β. In fact, the transfer switch composed of the transmission gate described in Figure 5 401, 402, 403, 404, and 405 have equivalently replaced the second figure _, switch off the levels 201, 202, 203, 204, and 205, and the voltage divider resistors R20 &, R2Q7, R208, r2〇s, r2i 〇. Therefore, in the non-test mode, the existence of electricity between the voltage points値 is 20 κ Ω; however, in the test mode, the resistance 値 between each voltage dividing point is about Ί. 8 κ Ω 'is exactly the same as the actual operation of Figure 2. Sections 7A, 7B, 7C, and The 7D chart uses waveform diagrams to describe some experimental results. Figure 7A illustrates the LCD waveform charts 'No. 7B, 7C, and 7D when no load is used to illustrate the different points when the LCD Panel is under the same load'. The waveform of the piezoresistor. Figure 7A describes the display waveform of the LCD under no load (SEGx and COM6 are taken as examples). In this figure, the waveform shown is very good, and there are very few spikes. Section 7B The figure depicts the external LCD display behind the screen (with a load > 'the LCD circuit's voltage-dividing resistor 値 is 100KΩ, the waveform output of the LCD (take "S EGx and C OM 3" as an example). The figure shows that China National Standards (CNS) Α4 specifications (2: 0X297 mm) are applicable at the high 11 wood paper scale J; K --- ο installed-(Please read the precautions on the back before filling this page ) · Order ^ 38990 V. Description of the invention (A7 B7 f 1 · Under the resistance of the supplementary resistor 'Spike is equivalent The display waveform when the voltage divider resistor of the LCD circuit is 50KΩ as described in Figure 7C (take "SEGx and COM4" as an example). The Spike of the waveform shown in this figure is better than that shown in Figure 7B. Figure 7D shows the waveform output of the LCD when the voltage dividing resistor 値 of the | _CD circuit is 25KΩ (take "SeGx and COM3" as an example). Obviously, the spikes in this picture are even more reduced, showing a perfectly ideal Waveform. Therefore, when a smaller split resistance is used, a better Waveform with a smaller Spike will be obtained. The above description is only a good practical example of the present invention, and is not intended to limit the scope of the patent application of the present invention; all other equivalent changes or modifications made without departing from the spirit of the spear disclosed by the present invention should be It is included in the following patent application parks. Representatives of the major parts of the consumer cooperation of the Intellectual Property Bureau of the Ministry of Economic Affairs: 10 1 LCD drive circuit 10 2 Common signal output terminal 10 3 Segment signal output terminal 104, 105, Ί 06 '1 07 20 1, 202, 203 , 204, 205 30 1, 302, 303, 304, 305 401, 402, 403, 404, 405 80 1 Microprocessor 802 LCD random access memory 803 LCD switching logic 804 LCD bias potential generator output input Foot switch switch switch: ---- r ------- 〇 installed -------- order --- T ------_. (Please read the note on the back first Please fill in this page again for details) 12 This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)