CN1316439C - Driving circuit of plane display device - Google Patents

Driving circuit of plane display device Download PDF

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CN1316439C
CN1316439C CN 03107381 CN03107381A CN1316439C CN 1316439 C CN1316439 C CN 1316439C CN 03107381 CN03107381 CN 03107381 CN 03107381 A CN03107381 A CN 03107381A CN 1316439 C CN1316439 C CN 1316439C
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signal
display
flat
scanning
unit
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CN 03107381
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CN1532787A (en
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尤建盛
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友达光电股份有限公司
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Abstract

一种平面显示器的驱动电路,布局于一平面显示面板上,由复数信号线、至少一扫瞄信号互补对产生单元、复数开关单元及一显示区所组成,其中这些信号线用以提供复数模拟视频信号至这些开关单元,至少一扫瞄信号互补对产生单元用以产生至少一扫瞄信号,并输出至这些开关单元,通过该至少一扫瞄信号控制这些开关单元的动作,将所接收的模拟视频信号切换为数据信号,并输出至显示区。 A flat display driving circuit layout in a plane defined by a plurality of signal lines, scanning at least a pair of complementary signal generating means, and a plurality of switch units composed of a display area on the display panel, wherein the signal lines for providing a plurality of analog video signal to the switching unit, at least one complementary signal generating at least one scanning signal generation unit for scanning, and output to the switch unit, operation of the switch unit controlled by at least one of the scanning signal, the received analog video signal is switched to the data signal, and output to the display area.

Description

平面显示器的驱动电路 The flat panel display driving circuit

技术领域 FIELD

本发明涉及一种驱动电路,尤其是指一种平面显示器的驱动电路。 The present invention relates to a drive circuit, particularly to a drive circuit of a flat display.

背景技术 Background technique

随着光电产业的发达,平面显示器已普遍地应用于任何的监视器或电子产品的显示屏上。 With the development of the optoelectronics industry, it has been widely used flat panel display on any monitor or electronic display. 目前的平面显示器是将驱动电路、薄膜晶体管及必要的电路布局于玻璃基板上。 The current driver circuit is a flat panel display, a thin film transistor and the necessary circuit layout on the glass substrate. 图1显示公知信号取样/维持电路的示意图,该信号取样/维持电路布局于基板上,且模拟开关111,112,113配置于信号线121,122,123与显示区131之间,其中,这些模拟开关111,112,113的控制闸极是分别连接于反相电路141的输出端,反相电路141的输入端连接于一时序信号产生器(图未示),以接收并产生时序信号产生器所产生的反相时序信号,供输出互补对的扫瞄信号来分别控制每一模拟开关111,112,113的动作,这些模拟开关111,112,113并分别连接至信号线121,122,123,以接收模拟视频信号且由扫描信号的控制输出相对应的模拟视频信号。 1 shows a schematic view of a known signal is sampled FIG / sustain circuit, the signal sample / hold circuit layout on the substrate, and the analog switches 111, 112 disposed in the signal line between the display region 121 to 131, wherein the the output terminal of the analog switch 111, the control gate electrode is connected to the inverter circuit 141, the input of the inverter circuit 141 is connected to a timing signal generator (not shown) to receive and generate a timing signal generator inverted timing signal is generated, the output scan signal is supplied to each complementary pair of analog switches 111, 112 control the operation of each of the analog switches 111, 112 and 121 are respectively connected to the signal line, 123, to receive an analog video signal and outputs a scan control signal from the corresponding analog video signal.

然而,这些模拟开关111,112,113连接至反相电路141或信号线121,122,123时,会在信号线121,122,123上产生交叉但不连接的交越点(Crossover)151,152,当然,于本示意图中有更多的交越点151,152并未画出。 However, these analog switches 111, 112, 121, 122 when connected to the inverter circuit 141 or the signal line, but does not produce cross-cross-linked to the signal line 121 to the point (Crossover) 151, 152, of course, more crossover point 151 is not shown in this schematic. 这些交越点151,152之处皆会产生寄生电容(Parasitic Capacitance)。 At these crossover points 151 and 152 are the parasitic capacitance is generated (Parasitic Capacitance). 由于寄生电容会造成电能损耗,并使得画面品质降低。 Since the parasitic capacitance can cause power loss, and so the picture quality is lowered. 因此,在模拟开关111,112,113、反相电路141及信号线121,122,123之间如何布局,以降低寄生电容数量,已成为一亟需解决的课题。 Accordingly, 111, 112, an inverter circuit 141 and the signal line between how the layout of the analog switch 121, 122 in order to reduce the number of the parasitic capacitance has become a problem to be resolved.

发明内容 SUMMARY

本发明的主要目的是在提供一种平面显示器的驱动电路,能减少寄生电容的数量,以改善电能损耗与提升画面品质。 The main object of the present invention is to provide a flat display driving circuit, the number of parasitic capacitance can be reduced to improve the power loss and improve picture quality.

为实现上述目的,本发明一种平面显示器的驱动电路,是布局于一平面显示面板上,该平面显示面板具有一显示区,该驱动电路主要包括:多条信号线,提供多个模拟视频信号;至少一扫瞄信号互补对产生单元,用以产生至少一扫瞄信号;以及多个开关单元,是配置于这些提供多个模拟视频信号的信号线之间,每一开关单元并分别与至少一信号线相连接,以接收一模拟视频信号,每一开关单元并与该至少一扫瞄信号互补对产生单元相连接,通过该至少一扫瞄信号控制这些开关单元的动作,以输出数据信号至该平面显示面板的该显示区。 To achieve the above object, the present invention provides a flat display driving circuit, a layout on a plane on the display panel, the flat display panel having a display region, the driving circuit includes: a plurality of signal lines, a plurality of analog video signals ; complementary to at least a scanning signal generation unit for generating at least one scanning signal; and a plurality of switch units, is disposed between the analog video signal to provide a plurality of signal lines, respectively, each switch unit and at least a signal line connected to receive an analog video signal, and each switch unit is connected to means for generating a scanning signal to the at least complementary to, the operation of the switch unit controlled by at least one of the scanning signal to output the data signal to the plane of the display area of ​​the display panel.

本发明驱动电路的这些开关单元与该平面显示面板的该显示区配置无特殊的限制,较佳为这些开关单元与该平面显示面板的该显示区之间相隔至少一条信号线。 The switching unit drive circuit of the invention the flat display panel of the display region is disposed is not particularly limited, preferably the switching unit separated by at least one signal line between the display region and the flat display panel.

本发明驱动电路的信号线配置无特殊的限制,较佳为该至少一信号线介于该开关单元与该扫瞄信号互补对产生单元之间。 Signal line driver circuit of the present invention is disposed is not particularly limited, and preferably for at least a signal line between the switching unit and the scanning signal generating unit complementary pair.

本发明驱动电路的该信号线与该开关单元间的配置无特殊的限制,较佳为这些提供多个模拟视频信号的信号线介于该开关单元与该显示区之间。 The signal line driving circuit of the present invention is not particularly limited and disposed between the switch unit, preferably a plurality of such analog video signals to provide a signal line between the switching unit and the display region.

本发明驱动电路的扫瞄信号互补对产生单元无限制,较佳为一放大电路,最佳为一反相放大电路,以接收一时序信号,并将该时序信号进行放大,以输出该至少一扫瞄信号。 Complementary scanning signal driving circuit generating unit of the present invention is not limited, preferably an amplifying circuit, an inverting amplifier circuit is preferred to receive a timing signal, and amplifies the timing signal, to output the at least one scanning signal.

本发明的平面显示器的驱动电路,其中该至少一扫瞄信号为该时序信号的反相信号。 Flat display driving circuit of the present invention, wherein the at least one scanning signal for the inverted signal of the timing signal.

本发明的平面显示器的驱动电路,其中这些开关单元为晶体管。 Flat display driving circuit of the present invention, wherein the switching unit is a transistor.

本发明的平面显示器的驱动电路,其中这些开关单元为薄膜晶体管(TFT)。 Flat display driving circuit of the present invention, wherein the switch unit is a thin film transistor (TFT).

适用于本发明驱动电路的平面显示面板无限制,较佳为该平面显示面板为等离子显示面板(PDP),有机电激发光显示面板(OLED),场发射显示面板(FED)或液晶显示面板(LCD),最佳为液晶显示面板。 Planar circuit suitable for driving a display panel according to the present invention is not limited, the preferred display panel is a plasma display panel (PDP) is a plan, organic electroluminescent display panel (the OLED), field emission display panel (FED) panel or a liquid crystal display ( LCD), most preferably liquid crystal display panel.

附图说明 BRIEF DESCRIPTION

图1是公知信号取样/维持电路的示意图;图2(A)是本发明第一较佳实施例的驱动电路示意图;图2(B)是本发明第一较佳实施例产生的寄生电容示意图;图3(A)是本发明第二较佳实施例的驱动电路示意图;图3(B)是本发明第二较佳实施例产生的寄生电容示意图;图4是本发明与公知的比较表格。 FIG 1 is a schematic diagram of a known signal sample / hold circuit; Figure 2 (A) is a schematic view of a first preferred embodiment of a driving circuit of the embodiment of the present invention; FIG. 2 (B) is a schematic view of a parasitic capacitance of the first preferred embodiment of the present invention is produced by ; FIG. 3 (a) is a schematic view of a second preferred embodiment of a driving circuit of the embodiment of the present invention; FIG. 3 (B) is a schematic diagram of a parasitic capacitance of the second preferred embodiment of the present invention is produced; FIG. 4 of the present invention is a table comparing the known .

具体实施方式 Detailed ways

有关本发明的第一实施例,敬请参照图2(A)显示的取样/维持驱动电路示意图,其主要由复数信号线211,212,213、复数开关单元221,222,223、扫瞄信号互补对产生单元231及显示区241所组成。 For the first embodiment of the present invention, please refer to FIG. 2 samples (A) shows the / sustain driver circuit schematic, consisting essentially of a plurality of signal lines 212, 213, 221, 222, a plurality of switching means, scanning signal complementary pair generation unit 231 and the display region 241 is composed. 这些信号线211,212,213用以提供模拟视频信号,例如:信号线211提供蓝色的模拟视频信号,信号线212提供红色的模拟视频信号,信号线213提供绿色的模拟视频信号。 These signal lines 212, 213 for providing an analog video signal, for example: signal line 211 provides the blue analog video signal, a signal line 212 provides an analog video signal of the red, green signal line 213 to provide analog video signal.

于本实施例中,扫瞄信号互补对产生单元231较佳为一反相电路。 In the present embodiment, the scanning signal generating unit 231 is complementary to the inverter circuit is preferably a. 其输入端连接至一扫瞄信号产生单元(图未示),该扫瞄信号产生单元用以产生正相时序信号,用来驱动这些开关单元221,222,223内的N型金属氧化半导体场效晶体管(NMOS),扫瞄信号互补对产生单元231则接收扫描信号产生单元输出的正相时序信号,供产生扫瞄信号的互补对(即反相时序信号),以驱动这些开关单元221,222,223内的P型金属氧化半导体场效晶体管(PMOS)。 An input terminal connected to a scanning signal generating unit (not shown), the scanning signal generating unit for generating n phase timing signals for driving the N-type metal oxide semiconductor field 221, in the switch unit n phase timing signal effect transistors (the NMOS), complementary to the scanning signal generating unit 231 receives the output from the scanning signal generating unit for generating a scanning signal to the complementary (i.e., inverted timing signal) to drive the switching unit 221, P-type metal-oxide semiconductor field effect transistors in 222,223 (PMOS).

于本实施例中,这些开关单元221,222,223可为任何电子切换开关,较佳为晶体管开关,最佳为薄膜晶体管开关(TFT)。 In the present embodiment, the switching unit 221, which may be any electronic switch, preferably a transistor switch, most preferably a thin film transistor switch (TFT). 这些开关单元221,222,223是配置于信号线212与信号线213之间,且其控制闸极皆连接于扫瞄信号互补对产生单元的输出端,每一开关单元221,222,223亦分别与一信号线211,212,213相连接,供分别接收信号线211,212,213所传输的模拟视频信号,并通过扫瞄信号控制这些开关单元221,222,223的输出与这些模拟视频信号相对应的数字数据信号。 The switching unit 221, 213 is disposed between the signal line and the signal line 212, and a control gate which are connected to the output terminal of the unit generating scanning signals complementary to each switch unit 221, is also are respectively connected to a signal line 212, 213, for receiving analog video signals are transmitted by signal lines 212, 213, and controls the switching unit 221, outputs the analog video signal by scanning signal corresponding to the digital data signals. 其中,这些开关单元221,222,223分别通过信号输出线2211,2221,223将数字数据信号输出至显示区241中的数据线(图未示)。 Wherein the switching unit 221, the digital data signals are respectively outputted to the signal output line 2211,2221,223 display area by a data line (not shown) 241.

图2(B)显示本发明第一实施例所产生的寄生电容示意图,开关单元221与信号线布线2111是与信号线212及扫瞄信号互补对产生单元231与这些开关单元221,222,223的连接线2311,2312的交越点411,412,413(图中被注记三角形处)产生寄生电容(共3个寄生电容)。 FIG 2 (B) show a schematic diagram of a parasitic capacitance generated by a first embodiment of the present invention, the switching unit 221 and the signal wiring line 2111 is a signal line 212 and the scanning signal generating unit 231 and a complementary pair of these switching units 221, cross-connecting lines of the points 411, 2311, 2312 (FIG Note triangle are at) a parasitic capacitance (parasitic capacitance of 3). 开关单元222与信号线布线2121是与扫瞄信号互补对产生单元231及这些开关单元221,222,223的连接线2311,2312的交越点421,422,423(图中被注记方形处)产生寄生电容(共3个寄生电容)。 Switch unit 222 to the signal line and the scanning signal line 2121 is complementary crossover 421,422,423 (Note the square of the drawing generation unit 231 and the switch unit 2311 is connected to the line 221, ) a parasitic capacitance (parasitic capacitance of 3). 开关单元223与信号线布线2131是与这些开关单元221,222,223的信号输出线2211,2221,223 1的交越点431,432,433(图中被注记六角形处)产生寄生电容(共3个寄生电容)。 Switch unit 223 to the signal line 2131 is a wiring line 221, and the quadrature signal output of the switching unit 2211,2221,223 1 These points 432, 433 (FIG annotation being hexagonal at) parasitic capacitance (total parasitic capacitance).

图3显示本发明取样/维持驱动电路的第二实施例示意图,其组成元件与连接方式皆与第一实施例类似,惟这些开关单元321,322,323在图2(A)中原本配置于信号线212(提供红色模拟视频信号)与信号线213(提供绿色模拟视频信号)之间,于本实施例中,这些开关单元321,322,323则配置于信号线313(提供绿色模拟视频信号)与信号线311(提供蓝色模拟视频信号)之间,且于图2(A)中,这些开关单元321,322,323与显示区241之间隔着一条信号线213,于本实施例中,这些开关单元321,322,323与显示区341之间隔着二条信号线311,312。 3 shows a schematic view of a second embodiment of the driving circuit of the present invention, the sampling / maintain its connection with the constituent elements are similar to the first embodiment, but the switching unit 321, 322 originally disposed in FIG 2 (A) signal line 212 (an analog video signal to provide the red) and the signal line 213 (an analog video signal to provide green) between, in the present embodiment, the switch unit 321, 322 is disposed in the signal line 313 (an analog video signal to provide green ) and the signal line 311 (provided between the blue analog video signal), and in FIG. 2 (A), the switches 321, 322 and the display unit via a signal line region 213, 241 between the embodiment according to the present embodiment in these switching units 321, 322 and the display region interposed between the two signal lines 311, 312, 341.

图3(B)显示本发明第二实施例所产生的寄生电容示意图,开关单元321与信号线布线3111是与这些开关单元321,322,323的输出信号线3211,3221,3231及开关单元322连接至信号线312的连接线3222的交越点451,452,453,454(图中被注记三角形处)产生寄生电容(共4个寄生电容)。 FIG 3 (B) show a schematic view of a second embodiment of the parasitic capacitance produced by the present invention, the switching unit 321 and the signal wiring line switching unit 3111 is the output signal line 321, 322 and the switch unit 322 3211,3221,3231 cross-connected to the signal line 312 connected to the line of the points 451,452,453,454 3222 (FIG Note triangle are at) a parasitic capacitance (parasitic capacitance 4). 开关单元322与信号线布线3121是与这些开关单元321,322,323的信号输出线3211,3221,3231及信号线311的交越点461,462,463,464(图中被注记六角形处)产生寄生电容(共4个寄生电容)。 Switch unit 322 to the signal line 3121 is a wiring cross section of these switches 321, 322 of the signal output line and the signal line 311 3211,3221,3231 more points 461,462,463,464 (Note hexagonal figure is at) a parasitic capacitance (parasitic capacitance 4). 开关单元323与信号线布线3131是与扫瞄信号互补对产生单元331及这些开关单元321,322,323的连接线3311,3312的交越点441,442(图中被注记方形处)产生寄生电容(共2个寄生电容)。 Switch unit 323 to the signal line and the scanning signal line 3131 is complementary to the crossover point 441, the generation unit 331 and the switch unit 321, 322 of the connecting lines 3311,3312 (in the figure at the annotation square) produced a parasitic capacitance (parasitic capacitance of 2).

图4显示本发明与公知驱动电路布局所产生的寄生电容的比较示意表,由此表可得知,在每一个画素长度之内,公知的电路布局将产生12个寄生电容,但若依据本发明第一实施例的布局,则仅产生9个寄生电容,若依据本发明第二实施例的布局,产生10个寄生电容,故本发明的确降低布局所产生的寄生电容数量,以改善电能损耗与提升画面品质。 Table 4 shows a schematic comparison of the present invention, the parasitic capacitance with the known driving circuit layout generated, whereby the sheet can be learned, each pixel in length, the known circuit arrangement 12 generates a parasitic capacitance, but if according to the present the layout of the first embodiment of the invention, the parasitic capacitance generated only 9, if the layout of the second embodiment according to the present invention, parasitic capacitance is generated 10, so that the present invention does reduce the amount of parasitic capacitance generated by the layout to improve the power loss and improve picture quality.

上述实施例仅是了方便说明而举例而已,本发明所主张的权利范围自应以权利要求书为准,而非仅限于上述实施例。 The above-described embodiments are merely for convenience of illustration and example only, the scope of rights of the present invention to be claimed from claims and their equivalents, and not limited to the above embodiments.

Claims (8)

1.一种平面显示器的驱动电路,布局于一平面显示面板上,该平面显示面板具有一显示区,该驱动电路,其特征在于,主要包括:多条信号线,用于提供多个模拟视频信号;至少一扫瞄信号互补对产生单元,用以产生至少一扫瞄信号;多个开关单元,配置于这些提供多个模拟视频信号的信号线之间,其中这些开关单元与该平面显示面板的该显示区之间相隔至少一条信号线,每一开关单元分别与至少一信号线相连接,以接收一模拟视频信号,每一开关单元并与该至少一扫瞄信号互补对产生单元相连接,通过该至少一扫瞄信号控制这些开关单元的动作,以输出数据信号至该平面显示面板的该显示区。 1. A flat display driving circuit layout on a flat panel display, the flat display panel having a display region, the driving circuit, characterized in that, including: a plurality of signal lines, for providing a plurality of analog video signal; complementary to at least a scanning signal generation unit for generating at least one scanning signal; a plurality of switching means, disposed between the analog video signal to provide a plurality of signal lines, wherein the switching unit and the flat display panel spaced between the display region at least one signal line, each of the switch units are respectively connected to at least one signal line for receiving an analog video signal, and means for generating each switch unit connected to the at least one scanning signal complementary , by the operation of the at least one of these scanning signal control the switching unit to output the data signals to the flat display area of ​​the display panel.
2.根据权利要求1所述的平面显示器的驱动电路,其特征在于,其中该至少一扫瞄信号互补对产生单元为反相电路,其接收一时序信号,并将该时序信号进行反相处理,以输出该至少一扫瞄信号。 The drive circuit according to claim 1 flat panel display, wherein, wherein the at least one scanning signal generating unit for complementary inverter circuit which receives a timing signal and the timing signal for inverse processing to the at least one scanning output signal.
3.根据权利要求2所述的平面显示器的驱动电路,其特征在于,其中该至少一扫瞄信号为该时序信号的反相信号。 The driving circuit of a flat display according to claim 2, wherein, wherein the at least one scanning signal for the inverted signal of the timing signal.
4.根据权利要求1所述的平面显示器的驱动电路,其特征在于,其中这些开关单元为晶体管。 The driving circuit of a flat display according to claim 1, wherein, wherein the switching unit is a transistor.
5.根据权利要求1所述的平面显示器的驱动电路,其特征在于,其中这些开关单元为薄膜晶体管。 The driving circuit of a flat display according to claim 1, wherein, wherein the switch unit is a thin film transistor.
6.根据权利要求1所述的平面显示器的驱动电路,其特征在于,其中至少一信号线介于该开关单元与该扫瞄信号互补对产生单元之间。 6. The drive circuit according to a flat panel display according to claim, wherein, wherein the at least one signal line between the switching unit and the scanning signal generating unit complementary pair.
7.根据权利要求1所述的平面显示器的驱动电路,其特征在于,其中这些提供多个模拟视频信号的信号线介于该开关单元与该显示区之间。 7. The driving circuit according to a flat panel display according to claim, wherein, wherein the analog video signal to provide a plurality of signal lines between the switch unit and the display area.
8.根据权利要求1所述的平面显示器的驱动电路,其特征在于,其中该平面显示面板为液晶显示面板。 8. The drive circuit according to claim 1 of the flat panel display, wherein, wherein the flat display panel is a liquid crystal display panel.
CN 03107381 2003-03-25 2003-03-25 Driving circuit of plane display device CN1316439C (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4890097A (en) * 1984-11-16 1989-12-26 Matsushita Electric Industrial Co., Ltd. Active matrix circuit for liquid crystal displays
CN1319834A (en) * 2000-03-30 2001-10-31 夏普株式会社 Active matrix type LCD device
JP2003084718A (en) * 2001-09-10 2003-03-19 Toshiba Corp Liquid crystal display element

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4890097A (en) * 1984-11-16 1989-12-26 Matsushita Electric Industrial Co., Ltd. Active matrix circuit for liquid crystal displays
CN1319834A (en) * 2000-03-30 2001-10-31 夏普株式会社 Active matrix type LCD device
JP2003084718A (en) * 2001-09-10 2003-03-19 Toshiba Corp Liquid crystal display element

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