CN101174038A - LCD device - Google Patents

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Publication number
CN101174038A
CN101174038A CN 200610063422 CN200610063422A CN101174038A CN 101174038 A CN101174038 A CN 101174038A CN 200610063422 CN200610063422 CN 200610063422 CN 200610063422 A CN200610063422 A CN 200610063422A CN 101174038 A CN101174038 A CN 101174038A
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liquid crystal
crystal display
test
circuit
connected
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CN 200610063422
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Chinese (zh)
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CN101174038B (en
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祁小敬
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群康科技(深圳)有限公司;群创光电股份有限公司
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Abstract

本发明涉及可消除关机残影的一种液晶显示器,其包括一液晶显示面板、一扫描驱动电路和一数据驱动电路。 The present invention relates to image sticking can be eliminated off a liquid crystal display comprising a liquid crystal display panel, a scan driving circuit and a data driving circuit. 该液晶显示面板包括一像素阵列、一短路测试电路和一控制单元。 The liquid crystal display panel includes a pixel array, a test circuit and a short-circuit control unit. 该扫描驱动电路用来扫描该液晶显示面板,该数据驱动电路用来在该液晶显示面板被扫描时提供灰阶电压给该液晶显示面板。 The scan driving circuit for scanning the liquid crystal display panel, the data driving circuit is used to provide gray scale voltage to the liquid crystal display panel when the liquid crystal display panel is scanned. 该控制单元和该短路测试电路构成一放电电路,该液晶显示器断开电源时,该液晶显示面板内部储存的电荷通过该放电电路迅速释放。 The control unit and the short circuit test a discharge circuit, the power is disconnected when the liquid crystal display, the liquid crystal display panel inside the charge stored by the discharge circuit quickly released.

Description

液晶显示器 LCD Monitor

技术领域 FIELD

本发明涉及一种液晶显示器。 The present invention relates to a liquid crystal display.

背景技术 Background technique

由于液晶显示器具有轻、薄、耗电小等优点,因此被广泛应用于电视、笔记本电脑、移动电话、个人数字助理等现代化信息设备上。 Since the liquid crystal display has a light, thin, low power consumption, etc., it is widely used in televisions, notebook computers, mobile phones, personal digital assistants and other modern information equipment. 通常,在一帧画面的显示时间内,液晶显示器利用储存电容储存电荷以维持画面的显示。 Typically, in a display period of one frame, the liquid crystal display using the storage capacitor stores charge in order to maintain the display screen. 当该液晶显示器关机时,储存电容所储存的电荷如果不能及时释放则会出现画面残留现象。 When the liquid crystal display off, the charge stored in the storage capacitor, if not release screen sticking phenomenon occurs.

请参阅图l,是一种现有技术液晶显示器的等效电路图。 Referring to FIG. L, the prior art is an equivalent circuit diagram of a liquid crystal display. 该液晶 The LCD

显示器100包括一液晶显示面板(未标示)、 一扫描驱动电路110和一数据驱动电路120。 Display 100 includes a liquid crystal display panel (not shown), a scan driving circuit 110 and a data driving circuit 120. 该扫描驱动电路110和该数据驱动电路120是通过玻璃覆晶(chip on glass, COG)工艺贴合在该液晶显示面板上。 The scan driving circuit 110 and the data driving circuit 120 by a chip on glass (chip on glass, COG) bonding process on the liquid crystal display panel. 该扫描驱动电路110用来扫描该液晶显示面板,该数据驱动电路120用来在该液晶显示面板被扫描时提供灰阶电压到该液晶显示面板。 The scan driving circuit 110 for scanning the liquid crystal display panel, the data driving circuit 120 is used to provide gray scale voltage to the liquid crystal display panel when the liquid crystal display panel is scanned.

该液晶显示面板包括一像素阵列130和一短路测试电路140。 The liquid crystal display panel includes a pixel array 130 and a short circuit test circuit 140. 该短路测试电路140通常用来在液晶显示面板制造过程后期未贴装驱动电路时检测该液晶显示面板。 The short circuit 140 is typically used to test a display panel manufacturing process does not post the placement detecting circuit driving the liquid crystal display panel when the liquid crystal. 该像素阵列130包括多条平行的扫描线lll、多条平行且与该扫描线111绝缘相交的数据线121和多个像素单元150。 The pixel array 130 comprises a plurality of parallel scan lines lll, a plurality of parallel and intersecting with the scanning lines 111 insulated data lines 121 and a plurality of pixel units 150. 每一像素单元150位于该多条扫描线lll与该多条数据线121所界定的最小矩形区域内。 Each pixel unit 150 is located within the area of ​​the smallest rectangle lll plurality of scan lines and the plurality of data lines 121 define. 该扫描线111与该扫描驱动电路110 连接,该数据线121与该数据驱动电路120连接。 The scanning line 111 is connected to the scan driving circuit 110, the data line 121 connecting the driving circuit 120 to the data.

该像素单元15()包括一薄膜晶体管151、 一储存电容152和一公共电极153。 The pixel unit 15 () comprises a thin film transistor 151, a storage capacitor 152 and a common electrode 153. 该薄膜晶体管151的栅极与该扫描线111连接,源极与该数据线121连接,漏极与该储存电容152的一端连接。 The gate of the thin film transistor 151 is connected to the scanning line 111, a source electrode connected to the data line 121, a drain connected to one end of the storage capacitor 152. 该储存电容152 的另一端连接到该公共电极153。 The other end of the storage capacitor 152 is connected to the common electrode 153. 该薄膜晶体管151用作该储存电容152充电、放电的控制开关。 The thin film transistor 151 is used as the charge storage capacitor 152, discharge control switch.

该短路测试电路140包括多个开关薄膜晶体管(switch thin film transistor) 141 、 一测试控制线142和一第一测试端1401、 一第二测试端1402、 一第三测试端1403、 一第四测试端1404、 一第五测试端1405。 The test circuit 140 includes a short circuit 141, a test control line 142 and a first test terminal over 1,401 switching thin film transistor (switch thin film transistor), a second test terminal 1402, a third test terminal 1403, a fourth test end of 1404, a fifth test end 1405. 每一奇数行扫描线111分别经由一开关薄膜晶体管141的漏极、源极连接到该第三测试端1403。 Each odd row scanning line 111, respectively, via the drain of a switching thin film transistor 141, a source electrode connected to the third test terminal 1403. 每一偶数行扫描线111分别经由一开关薄膜晶体管141的漏极、源极连接到该第四测试端1404。 Each even row scanning line 111, respectively, via the drain of a switching thin film transistor 141, a source terminal connected to the fourth test 1404. 每一奇数列数据线121分别经由一开关薄膜晶体管141的源极、漏极连接到该第一测试端1401。 Each odd-numbered data lines 121 are the source via a switching thin film transistor 141, a drain connected to the first end of the 1401 test. 每一偶数列数据线121分别经由一开关薄膜晶体管141的源极、漏极连接到该第二测试端1402。 Each even-numbered data lines 121, respectively, a drain connected to the source of the second test terminal 1402 via a switching thin film transistor 141. 该第五测试端1405经由该测试控制线142依次与该多个开关薄膜晶体管141的栅极串联,并连接到该扫描驱动电路110。 The fifth test terminal 1405 via the driving circuit 110 sequentially tests the gate control line 142 in series with the plurality of switching thin film transistors 141, and is connected to the scan. 上述短路测试电路140的结构也称为2G2D结构。 Structure of the short-circuit test circuit 140 is also referred 2G2D structure.

该短路测试电路140通常用来在液晶显示面板制造过程后期未贴装驱动电路时检测该多条扫描线111和该多条数据线121是否完好。 The short circuit test circuit 140 is typically used in the manufacturing process of the liquid crystal display panel does not mount the late detection of the plurality of scanning lines 111 and the plurality of data lines driver circuit 121 is intact. 在进行液晶显示面板检测时,上述每一测试端各自分别外接一测试讯号。 When the liquid crystal display panel is detected during the testing of each end of each separately add a test signal. 该第五测试端1405施加一高电压讯号,使该多个开关薄膜晶体管141导通。 The fifth test terminal 1405 is applied to a high-voltage signal, so that the plurality of switching thin film transistor 141 is turned on. 该第三测试端1403和该第四测试端1404分别施加一高电压到每一奇数行扫描线111和每一偶数行扫描线111并导通所对应的薄膜晶体管151。 The third test terminal 1403 and a terminal 1404 of the fourth test applying a high voltage to each of the odd-row scanning line 111 and each even row scanning line 111 and turns on transistor 151 corresponding to the thin film, respectively. 该第一测试端1401和该第二测试端1402经由每一奇数列数据线121和每一偶数列数据线121将灰阶电压写入对应的储存电容152,从而在面板上显示出测试画面。 End of the first test and the second test terminal 1401 through 1402 each odd column of each even data line 121 and data lines 121 corresponding to the gray scale voltage written into the storage capacitor 152, thereby displaying a test screen on the panel. 通过这种方法,该短路测试电路140可用来检测液晶显示面板的扫描线111和数据线121是否完好。 By this method, the short circuit test 140 is used to detect the liquid crystal display panel 111 scan lines and the data lines 121 is intact. 而在液晶显示面板贴装一扫描驱动电路110之后,.该扫描驱动电路110工作时会施加一低电压经由该测试控制线142到所有开关薄膜晶体管141的栅极,使该短路测试电路140失效。 In the liquid crystal display panel after mounting a scan driving circuit 110,. Gate 142 will be applied to all of the switching thin film transistor 141 is a low voltage via the test control line of the scan driving circuit 110 operates, so that the short-circuit failure test circuit 140 .

该液晶显示器100接通电源后,该扫描驱动电路110依次施加一高电压到该多条扫描线lll,使与该扫描线111连接的多个薄膜晶体管151导通。 The liquid crystal display device 100 is powered up, the scan driving circuit 110 sequentially applies a high voltage to the LLL plurality of scanning lines, a plurality of thin film transistor 151 is turned on is connected to the scan line 111. 该数据驱动电路120依次经由相应的数据线121和处于导通状态的薄膜晶体管151施加一灰阶电压到该储存电容152,该储存电容152充电后储存一定电荷。 The data driving circuit 120 sequentially applies a gray scale voltage to the storage capacitor 152 via the corresponding data lines 121 and the thin film transistor 151 in the ON state after charging the storage capacitor 152 storing an electric charge. 在该数据驱动电路120下一次写入灰阶电压之前,该储存电容152维持上述电荷不变。 Before the write-once gray scale voltage in the data driving circuit 120, the storage capacitor 152 to maintain the charge constant.

当该液晶显示器100断开电源时,即停止对该液晶显示器100 供电时,该多个储存电容152残留大量的电荷无法及时释放,从而导致显示屏上仍有残留影像,即关机残影现象。 The liquid crystal display 100 when power is turned off, i.e. stop the power supply when the liquid crystal display 100, the plurality of storage capacitor 152 can not release the residual amount of charge in a timely manner, resulting in an image on the display with residual, i.e. off afterimage phenomenon.

发明内容 SUMMARY

为解决现有技术中液晶显示器存在的关机残影的问题,有必要提供一种有效消除关机残影的液晶显示器。 To solve the problems present in the prior art liquid crystal display image sticking off, effectively eliminating the need to provide a liquid crystal display image sticking off.

一种液晶显示器,其包括一液晶显示面板、 一扫描驱动电路和一数据驱动电路。 A liquid crystal display comprising a liquid crystal display panel, a scan driving circuit and a data driving circuit. 该液晶显示面板包括一像素阵列、 一短路测试电路和一控制单元。 The liquid crystal display panel includes a pixel array, a test circuit and a short-circuit control unit. 该扫描驱动电路用来扫描该液晶显示面板,该数据驱动电路用来在该液晶显示面板被扫描时提供灰阶电压到该液晶显示面板。 The scan driving circuit for scanning the liquid crystal display panel, the data driving circuit is used to provide gray scale voltage to the liquid crystal display panel when the liquid crystal display panel is scanned. 该控制单元与该短路测试电路构成一放电电路,断开电源时,该液晶显示面板内部储存的电荷迅速释放。 The control unit and the short circuit test a discharge circuit, the power supply is turned off, charges inside the liquid crystal display panel storage rapid release.

相较于现有技术,本发明液晶显示器包括一控制单元和短路测试电路构成的》文电电路,在该液晶显示器在关闭电源后,该液晶显示面板内部储存的电荷可以经由该放电电路迅速释放,有效消除关机残影。 Compared to the prior art, the present invention comprises a liquid crystal display, "a paper supply circuit and short circuit test control circuit unit, in which the liquid crystal display after the power is turned off, the liquid crystal display panel inside the storage charge can be released quickly via the discharge circuit effectively eliminate blur off.

附图说明 BRIEF DESCRIPTION

图l是一种现有技术液晶显示器的等效电路图。 Figure l is a prior art equivalent circuit diagram of a liquid crystal display.

图2是本发明液晶显示器一较佳实施方式的等效电路图。 FIG 2 is an equivalent circuit of the liquid crystal display of the present invention a preferred embodiment.

具体实施方式 Detailed ways

请参阅图2,是本发明液晶显示器一较佳实施方式的等效电路图。 Please refer to FIG. 2, an equivalent circuit of the liquid crystal display of the present invention is a preferred embodiment. 该液晶显示器200包括一液晶显示面板(未标示)、 一扫描驱动电路210和一数据驱动电路220。 The liquid crystal display 200 includes a liquid crystal display panel (not shown), a scan driving circuit 210 and a data driving circuit 220. 该扫描驱动电路210和该数据驱动电 The scan driving circuit and the data driver 210 is electrically

路2 2 0是通过if皮璃覆晶工艺贴合于该液晶显示面板上。 Passage 220 through a flip-chip process if the skin bonded to the glass of the liquid crystal display panel. 该扫描驱动电路210用来扫描该液晶显示面板,该数据驱动电路220用来在该液晶显示面板被扫描时提供灰阶电压给该液晶显示面板。 The scan driving circuit 210 for scanning the liquid crystal display panel, the data driving circuit 220 to provide the gray scale voltage when the panel is scanned to a liquid crystal display panel of the liquid crystal display.

该液晶显示面板包括一像素阵列230 、 一短路测试电路240和一控制单元290。 The liquid crystal display panel includes a pixel array 230, a short-circuit test circuit 240 and a control unit 290. 该短路测试电路240与该控制单元290构成一放电电路,该液晶显示器200断开电源时,该液晶显示面板内部所储存的大量电荷经由该放电电路迅速释放。 The short circuit test circuit 240 to the control unit 290 constitute a discharge circuit, the liquid crystal display device 200 when the power supply is disconnected, the liquid crystal display panel of the amount of charge stored in the interior through the discharge circuit quickly released.

该像素阵列230包括多条相互平行的扫描线211、多条湘互平行且与该扫描线绝缘相交的数据线221和多个像素单元270。 The pixel array 230 comprises a plurality of mutually parallel scan lines 211, a plurality of mutually parallel and Gordon data line 221 insulated from and intersecting the plurality of pixel units 270 and the scanning lines. 每一像素单元270位于该多条扫描线211和该多条数据线221所界定的最小矩形区域内。 Each pixel unit 270 positioned within a minimum rectangular region of the plurality of scanning lines 211 and the plurality of data lines 221 define. 该扫描线211与该扫描驱动电路210连接,该数据线221 与该数据驱动电路220连接。 The scanning lines 211,210 connected to the scan driving circuit, the data line 221 and the data driving circuit 220 is connected.

该像素单元27()包括一薄膜晶体管271、 一储存电容272和一公共电极273。 The pixel unit 27 () comprises a thin film transistor 271, a storage capacitor 272 and a common electrode 273. 该薄膜晶体管271的栅极与该扫描线211连接,源极与该数据线221连接,漏极与该储存电容272的一端连接。 The gate of the thin film transistor 271 is connected to the scanning line 211, a source electrode connected to the data line 221, a drain connected to the storage capacitor 272 is connected to an end. 该储存电容272 的另一端连接到该公共电极273。 The other end of the storage capacitor 272 is connected to the common electrode 273. 该薄膜晶体管271用作该储存电容272充、放电的控制开关。 The thin film transistor 271 serves as the storage capacitor 272 charge and discharge control switch.

该短路测试电路2 4 0包括多个开关薄膜晶体管2 41 、 一测试控制线242和一第一测试端2401 、 一第二测试端2402 、 一第三测试端2403 、 一第四测试端2404、 一第五测试端2405。 The short circuit test circuit 240 includes a plurality of switching thin film transistor 241, a test control line 242 and a first test terminal 2401, a second test terminal 2402, a third test terminal 2403, a fourth test terminal 2404, a fifth test end 2405. 每一奇数行扫描线211分别经由一开关薄膜晶体管2 71的漏极、源极连接到该第三测试端2 4 0 3 。 Each odd row scanning line 211, respectively, via a drain electrode of the switching thin film transistor 271, a source electrode connected to the third test terminal 2403. 每一偶数行扫描线211分别经由一开关薄膜晶体管271的漏极、源极连接到该第四测试端2404。 Each even row scanning line 211, respectively, via the drain of a switching thin film transistor 271, a source terminal connected to the fourth test 2404. 每一奇数列数据线221分别经由一开关薄膜晶体管271的源极、漏极连接到该第一测试端2401 。 Each odd data line 221, respectively, a drain connected to the source of a first test terminal 2401 via a switching thin film transistor 271. 每一偶数列数据线221分别经由一开关薄膜晶体管271的源极、漏极连接到该第二测试端2402,该第五测试端2405经由该测试控制线242依次与该多个开关薄膜晶体管24 1的栅极串联。 Each even data line 221, respectively, a drain connected to the source of the second test terminal 2402 via a switching thin film transistor 271, the fifth test terminal 2405 via the test control line 242 successively to the plurality of switching thin film transistor 24 1 series gate. 在该液晶显示面板未贴装驱动电路时,该短路测试电路240从该五个测试端2401、 2402、 2403、 2404 和2405接收外部检测讯号并#r测该液晶显示面板。 When the liquid crystal display panel is not mounted driving circuit, the short circuit test of the five test end 240 from 2401, 2402, 2403, 2404 and 2405 receiving an external signal and detecting the measured #r liquid crystal display panel. 在贴装驱动电路后,该第一测试端2401和该第二测试端2402接地,该测试控制线242 连接到该扫描驱动电路210。 After mounting the driving circuit, the first test and the second test terminal 2401 terminal 2402 is grounded, the test control line 242 connected to the scan driving circuit 210.

该扫描驱动电路210包4舌一断电<呆护电i?各212,该断电{呆护电路212在关闭电源瞬间断开该扫描驱动电路210与该测试控制线242的连接。 The scan driving circuit package 210 off a tongue 4 <I spent guard electrically? 212 each, {stay off the protection circuit 212 disconnects the scan driving circuit 210 and the test control line 242 is in the power off instantaneously.

该控制单元29()包括一开关电路250、 一电荷储存电路260、 一第一直流输入端252和一第二直流输入端254。 The control unit 29 () comprises a switch circuit 250, a charge storage circuit 260, a first DC input terminal 252 and a second DC input terminal 254. 该开关电路250包括一P 沟道金属氧化物半导体场效应晶体管(p-channel metal oxide semiconductor field effect transistor, P-MOSFET) 251和一接地电阻256。 The switching circuit 250 comprises a P-channel metal oxide semiconductor field effect transistor (p-channel metal oxide semiconductor field effect transistor, P-MOSFET) 251 and a resistor 256 to ground. 该电荷储存电路260包括一第一端262、 一第二端264和多个并联于该第一端262和该第二端264之间的电容261。 The charge storage circuit 260 includes a first end 262, second end 264, and a plurality of parallel between the first end 262 and second end 264 of the capacitor 261. 该P-MOSFET 251 的栅极连接到该第一直流输入端252 ,并经由该接地电阻256接地。 The gate of P-MOSFET 251 is connected to the first DC input terminal 252, and is grounded via the resistor 256 to ground. 该P-MOSFET 25 l的漏极连接到该第三测试端2403、该第四测试端2404和该第五测试端2405 。 The drain of P-MOSFET 25 l test is connected to the third terminal 2403, the fourth and the fifth test end 2404 end 2405 test. 该P-MOSFET 251的源极连接到该第二直流输入端254,并连接到该第一端262。 The P-MOSFET 251 has a source connected to the second DC input terminal 254, and connected to the first end 262. 该第二端264接地。 The second end 264 is grounded.

该液晶显示器200的工作流程如下:该液晶显示器200在接通电源后,一10V直流电源电压Vcc施加到该第一直流输入端252, 一来自该扫描驱动电路210的10V电压Vgh施加到该第二直流输入端254,因此该P-MOSFET 251的栅极与源极之间的电压Vgs为零电压, 该P-MOSFET 25 1的源极与漏极不导通。 The liquid crystal display 200 workflow is as follows: The liquid crystal display 200 after power-on, a 10V DC power supply voltage Vcc is applied to the first DC input terminal 252, the scan driving circuit from a voltage of 10V 210 is applied to the Vgh a second DC input terminal 254, so that the voltage Vgs between the gate and source of P-MOSFET 251 is zero volts, the source and drain of P-MOSFET 251 is not conducting. 该第二直流输入端254对该电荷储存电路260充电。 The second DC input terminal 254 of the charge storage circuit 260 is charged.

该扫描驱动电路210依次施加一高电压到该多条扫描线211 ,使与该扫描线211连接的多个薄膜晶体管271导通。 The scan driving circuit 210 sequentially applies a high voltage to the plurality of scanning lines 211, a plurality of thin film transistors 271 conductively connected to the scanning line 211. 该数据驱动电路220 依次经由相应的数据线221和处于导通状态的薄膜晶体管271施加一灰阶电压到该储存电容272,该储存电容272充电后储存一定电荷。 The data driving circuit 220 sequentially applies a gray scale voltage to the storage capacitor 272 via the corresponding data lines 221 and the thin film transistor 271 in the ON state, the storage capacitor 272 charged after storing a charge. 在该数据驱动电路220下一次写入灰阶电压之前该储存电容272维持上述电荷不变。 Before the write-once in the gray scale voltage data driver circuit 220 of the storage capacitor 272 to maintain the charge constant.

该液晶显示器200断开电源后,该第一直流输入端252所接通的10V直流电源电压Vce和第二直流输入端254所接通的10V电压Vgh断开。 The liquid crystal display 200 after the power supply is disconnected, the first DC power supply 10V DC input voltage Vce end 252 and the second DC input terminal 254 is turned ON voltage Vgh of 10V is disconnected. 该P-MOSFET 251的栅极经由该接地电阻256接地。 The gate of P-MOSFET 251 is grounded via the resistor 256 to ground. 又,先前该电荷储存电路260被充电而保持10V的电压,该P-MOSFET 251的源极为10V的电压,因此该P-MOSFET 251的栅极与源极之间的电压V^ 为-10V的负电压:,该P-MOSFET 251导通。 In addition, the previous charge storage circuit 260 is charged and held voltage of 10V, the source of P-MOSFET 251 is extremely 10V voltage, so that the voltage V between the gate and the source of P-MOSFET 251 is of -10V ^ negative voltage: the P-MOSFET 251 is turned on. 该电荷储存电路260施加一高电压经由该导通的P-MOSFET 25 1和该第五测试端2405到该多个开关薄膜晶体管241的栅极,使该多个开关薄膜晶体管241导通。 The charge storage circuit 260 applies a high voltage through the turned-P-MOSFET 25 1 and 2405 to the fifth terminal of the plurality of test switching thin film transistor gate 241, so that the plurality of switching thin film transistor 241 is turned on. 该电荷储存单元260施加高电压经由该第三测试端2403 、该第四测试端2404到该多条扫描线211,使该多个薄膜晶体管271导通。 The charge storage unit 260 applies a high voltage via the third test terminal 2403, terminal 2404 to the fourth test the plurality of scanning lines 211, so that the plurality of thin film transistor 271 is turned on. 于是储存在每一储存电容272中的电荷经由相应的薄膜晶体管271 、数据线221、该第一测试端2401和该第二测试端2402接地迅速释放,进而有效消除关机残影现象。 Then the charge stored in the storage capacitor 272 in each of the 221, the first test and the second test terminal 2401 terminal 2402 is grounded via respective rapid release of the thin film transistor 271, the data lines, so as to effectively eliminate the phenomenon of afterimage off.

与现有技术相比,本发明液晶显示器200不需要改变扫描驱动电路210和资料驱动电路220的内部电路结构。 Compared with the prior art, the circuit 200 without changing the internal structure of the liquid crystal display of the present invention, the scan driving circuit 210 and the data driving circuit 220. 利用液晶显示面板制造过程后期的短路测试电路240的结构,再增加一定数目的电容、电阻和开关即可实现关机时有效消除残影。 Using the liquid crystal display panel manufacturing process late circuit 240 short-circuit test structures, and then add a certain number of capacitors, resistors and switches effective to eliminate blur shutdown.

Claims (10)

1.一种液晶显示器,其包括一液晶显示面板、一用来扫描该液晶显示面板的扫描驱动电路和一用来在该液晶显示面板被扫描时提供灰阶电压到该液晶显示面板的数据驱动电路,该液晶显示面板包括一像素阵列和一短路测试电路,其特征在于:该液晶显示面板进一步包括和一控制单元,该控制单元及该短路测试电路构成一放电电路,当该液晶显示器断开电源时,该液晶显示面板内部储存的电荷通过该放电电路迅速释放。 A liquid crystal display comprising a liquid crystal display panel, a scan for the liquid crystal display panel and a scan driving circuit for providing a gray scale voltage to the liquid crystal display panel is scanned the data driving the liquid crystal display panel circuit, the liquid crystal display panel includes a pixel array and a short circuit test circuit, wherein: the liquid crystal display panel further comprises a control unit and the control unit, and the short circuit test a discharging circuit when the liquid crystal display OFF when the power of the liquid crystal display panel of stored charge inside the discharge circuit by a rapid release.
2. 如权利要求1所述的液晶显示器,其特征在于:该控制单元包括一开关电路和一电荷储存电路,该短路测试电路与该开关电路、 该电荷储存电路依次串联并接地。 2. The liquid crystal display according to claim 1, wherein: the control unit comprises a switching circuit and a charge storage circuit, the short circuit test and the switching circuit, the charge storage circuit in series and grounded.
3. 如权利要求2所述的液晶显示器,其特征在于:该控制单元还包括一第一直流输入端和一第二直流输入端,该开关电路包括一P 沟道金属氧化物半导体场效应晶体管和一接地电阻,该P沟道金属氧化物半导体场效应晶体管的漏极连接到该短路测试电路,栅极连接到该第一直流输入端并经由该接地电阻接地,源极连接到该电荷储存电路与该第二直流输入端。 The liquid crystal display according to claim 2, wherein: the control unit further comprises a first DC input terminal and a second DC input terminal, the switching circuit comprises a P-channel metal oxide semiconductor field effect a transistor and a resistor to ground, the drain semiconductor P-channel metal oxide field effect transistor is connected to the short circuit test, a gate connected to the first DC input terminal and to ground via the grounding resistor, a source electrode connected to the charge storage circuit and the second DC input terminal.
4. 如权利要求3所述的液晶显示器,其特征在于:该电荷储存电路包括一第一端和一第二端,该第一端连接到该P沟道金属氧化物半导体的源极,该第二端接地。 The liquid crystal display according to claim 3, wherein: the charge storage circuit comprises a first end and a second end, the first end connected to a source of the P-channel metal oxide semiconductor electrode, the the second terminal is grounded.
5. 如权利要求4所述的液晶显示器,其特征在于:该电荷储存电路还包括多个并联于该第一端和该第二端之间的电容。 The liquid crystal display according to claim 4, wherein: the charge storage circuit further comprises a plurality of capacitors connected in parallel between the first end and the second end.
6. 如权利要求3所述的液晶显示器,其特征在于:该短路测试电路包括一测试控制线、多个开关薄膜晶体管和一第一测试端、 一第二测试端、 一第三测试端、 一第四测试端、 一第五测试端,该第一测试端、第二测试端接地,该第三测试端、第四测试端、第五测试端连接到该P沟道金属氧化物半导体场效应晶体管的漏极,该第五测试端经由该测试控制线依次与该多个开关薄膜晶体管的栅极串联,并连接到该扫描驱动电路。 The liquid crystal display according to claim 3, wherein: the short circuit test includes a test control line, a plurality of switching thin film transistor and a first test terminal, a second test terminal, a third test terminal, a fourth test terminal end of a fifth test, the first test terminal, the second end test, the third test terminal, a fourth terminal of the test, the test terminal is connected to the fifth P-channel metal oxide semiconductor field the drain-effect transistor, the fifth through the end of the test the test control line in series with the plurality of sequentially switching gate thin film transistor, and is connected to the scan driving circuit.
7. 如权利要求6所述的液晶显示器,其特征在于:该扫描驱动电路包括一断电保护电路,在该液晶显示器断开电源时该断电保护电路切断该扫描驱动电路与该测试控制线的连接。 The liquid crystal display according to claim 6, wherein: the scan driving circuit includes a power protection circuit, when the power of the liquid crystal display-off protection circuit cut off the scan driving circuit and the test control line Connection.
8. 如权利要求6所述的液晶显示器,其特征在于:该像素阵列包括多条相互平行的扫描线,多条相互平行且与该扫描线绝缘相交的数据线和多个像素单元,每一像素单元位于该多条扫描线与该多条数据线所界定的最小矩形区域内,每一奇数行扫描线连接到该第一测试端,每一偶数行扫描线连接到该第二测试端,每一奇数列数据线连接到该第三测试端,每一偶数列数据线连接到该第四测试端。 8. The liquid crystal display according to claim 6, wherein: the pixel array includes a plurality of mutually parallel scan lines, a plurality of mutually parallel and insulated from the scanning lines intersecting the data lines, and a plurality of pixel units, each pixel unit is located within the area of ​​the smallest rectangle plurality of scan lines and the plurality of data lines defined, each odd row scanning line connected to the first end of the test, each even row scanning line connected to the second end of the test, each odd column data line is connected to the third end of the test, each even data line is connected to the end of the fourth test.
9. 如权利要求8所述液晶显示器,其特征在于:该像素单元包括一薄膜晶体管、 一储存电容和一公共电极,该薄膜晶体管的栅极与该扫描线连接,源极与该数据线连接,漏极与该储存电容的一端连接,该储存电容的另一端与该公共电极连接。 9. The liquid crystal display of claim 8, wherein: the pixel unit comprises a thin film transistor, a storage capacitor and a common electrode, a gate of the scanning lines connected to the thin film transistor, a source connected to the data line , and a drain connected to one end of the storage capacitor, the storage capacitor and the other end connected to the common electrode.
10. 如权利要求9所述液晶显示器,其特征在于:该液晶显示器接通电源时,该第一直流输入端接通一10V直流电压,该第二直流输入端接通一10V直流电压,该P沟道金属氧化物半导体的源极与漏极不导通,该第二直流输入端所接通的直流电压对该电荷储存电路所包括的多个并联电容充电;该液晶显示器断开电源时,该第一直流输入端和该第二直流输入端断开所接通的IOV直流电压,该电荷储存电路具有高电压,该P沟道金属氧化物半导体的源极与漏极导通,该电荷储存电路放电并经由该P沟道金属氧化物半导体施加一高电压到该第三、第四及第五测试端,使得该短路测试电路所包括的所有开关薄膜晶体管和每一像素单元所包括的薄膜晶体管先后导通,进而该多个储存电容通过接地的该第一测试端和该第二测试端放电。 10. The liquid crystal display of claim 9, wherein: the liquid crystal display when the power is turned on, the first DC input terminal of a 10V direct current voltage is turned on, the second DC input terminal of a 10V direct current voltage is turned on, source and drain of the P-channel metal-oxide semiconductor is not conducting, the capacitor is charged in parallel a plurality of DC input terminal of the second DC voltage to the switched circuit included in the charge storage; power off the liquid crystal display when the first DC input terminal and a second DC input terminal of the DC voltage is turned OFF IOV, the charge storage circuit with high voltage, the source of the P-channel metal oxide semiconductor and a drain conduction the charge storage circuit and applying a high voltage discharge through the P-channel metal oxide semiconductor to the third, fourth and fifth test terminal, so that all the switching thin film transistor included in the short circuit test and each pixel cell thin film transistor comprising successively turned on, and thus the plurality of storage capacitor through the ground terminal of the first test and the second test discharge end.
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