CN100547416C - The scanning detection apparatus of flat-panel screens and method - Google Patents

The scanning detection apparatus of flat-panel screens and method Download PDF

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Publication number
CN100547416C
CN100547416C CNB200610065795XA CN200610065795A CN100547416C CN 100547416 C CN100547416 C CN 100547416C CN B200610065795X A CNB200610065795X A CN B200610065795XA CN 200610065795 A CN200610065795 A CN 200610065795A CN 100547416 C CN100547416 C CN 100547416C
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China
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wire
flat
shift register
panel screens
transistor switch
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Expired - Fee Related
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CNB200610065795XA
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CN101038315A (en
Inventor
罗平
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TPO Displays Corp
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Toppoly Optoelectronics Corp
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Abstract

A kind of scanning detection apparatus of flat-panel screens and method, this device comprise a p-wire and a plurality of transistor switch, are applicable to a plurality of shift registers that detect around display panel.In the process that detects display panel, need not disassemble display panel, can learn by the detection signal in the p-wire unusual shift register takes place, can save analysis time and increase and analyze successful probability, can carry out the protection of ESD simultaneously.

Description

The scanning detection apparatus of flat-panel screens and method
Technical field
The present invention relates to a kind of scanning detection apparatus and method, and be particularly related to a kind of scanning detection apparatus and method of flat-panel screens, be used to detect shift register.
Background technology
Early stage display is main with cathode ray iconoscope (Cathode Ray Tube abbreviates CRT as).In recent years, the development of flat-panel screens (Flat Panel Display) has been regarded as a ring very important in the technical development, and nearest new science and technology product-liquid crystal flat panel display (Liquid CrystalDisplay, abbreviate LCD as) be to utilize the principle of liquid crystal and the flat-panel screens that phenomenon is made, though general liquid crystal can flow freely as liquid, but its molecules align is still kept certain rule, in addition, its optical characteristics instability is easy to be subjected to the influence of external force (as electric field, temperature, pressure), produces tangible photoelectric effect.In application facet, flat-panel screens is widely used, from the instrument of electronic calculator, wrist-watch, game machine and the general electrical appliance of minimum, medium-sized even portable electronic dictionary, word processor and mobile computer, or be large-scale workstation and high image quality wall-hanging TV.
At the yield rate lifting of flat-panel screens manufacturing production and the high efficiency of product turnout amount, the function high efficiency of inspection and verifying attachment equipment is indispensable.Usually which row is the method for head it off must determine earlier or which display panel goes wrong, but the output of shift register operate as normal whether in the measurement plane display, and then which part is the affirmation problem be.
Figure 1A is the some of existing flat display driving circuit, and Figure 1B is the sequential chart of flat display driving circuit.Please refer to Figure 1A, this flat display driving circuit comprises a plurality of shift registers (100-110), a plurality of transmission gate (120-150) and a plurality of and door (160-170).
Please contrast Figure 1A and Figure 1B, the L1 in Figure 1B, L2 are the output signal of shift register corresponding among Fig. 1, and G1 and G2 are the signal of gate lines G 1 and G2 among corresponding Figure 1A.Wherein, when shift register 100 output datas, output signal L1 is the state of logic high, output signal L1 is the state of logic low when output is finished, and soon, 110 output signal L2 of shift register are logic high behind the shift register 100 output logic height, and this moment, shift register 100 continuation transmission data were kept logic high after a period of time, shift register 100 output signal L1 are logic low, and shift register 110 output signal L2 are logic low afterwards.Because each shift register and next shift register have common factor when conducting, and each common factor ON time do not repeat, therefore if utilize can timesharing output logic 0 with door 160,170 etc. signal.
The shortcoming of the circuit design of above-mentioned Figure 1A is, when display abnormality, because the output signal of these shift registers is not to measure so easily not learn, so can't learn it is which rank of shift register occurs unusual easily.If will follow the trail of the affirmation problem points, also must disassemble two-d display panel, this kind practice not only quite expends time in and manually, and the problem of circuit scratch very easily takes place in disassembling the process of two-d display panel.Once circuit by scratch, causes the entire circuit running to be lost efficacy possibly, can only renew usually, if not therefore necessity is not then advised this kind practice.
Summary of the invention
Purpose of the present invention just provides a kind of scanning detection apparatus of flat-panel screens, in the process that detects display panel, need not disassemble display panels, can learn by the detection signal in the p-wire and unusual shift register take place, can save analysis time greatly about which rank of.
A further object of the present invention provides a kind of scanning detection method of flat-panel screens, it need not disassemble display panels, as long as it is unusual that the shift register that externally utilizes p-wire which rank of just can measure occurs, increase and analyze probalility of success, and increase the antistatic protection function of display panel.
Another object of the present invention is providing a kind of electronic installation and/or flat-panel screens, issuable injury when these electronic installations and flat-panel screens are utilized aforesaid scanning detection apparatus with minimizing analysis time and detection.
The present invention proposes a kind of scanning detection apparatus of flat-panel screens, is applicable to a plurality of shift registers that detect around the display panel periphery.This scanning detection apparatus comprises a plurality of transistor switches and a p-wire.Wherein a plurality of transistor switches have first end, second end and control end, and 1 pair 1 output terminal that is coupled to each shift register of the control end of each transistor switch, and first end of each transistor switch is coupled to a current potential.And p-wire is coupled to second end of transistor switch.
According to the scanning detection apparatus of the described flat-panel screens of preferred embodiment of the present invention, wherein, p-wire is along short-circuited conducting sleeve of shift register coiled of display panel.
According to the scanning detection apparatus of the described flat-panel screens of preferred embodiment of the present invention, wherein, p-wire is ring and two short-circuited conducting sleeves of outer shroud in more coiled comprises, interior ring is placed between display panel and the shift register, and outer shroud is placed on outside the shift register.
According to the scanning detection apparatus of the described flat-panel screens of preferred embodiment of the present invention, wherein, p-wire more comprises discharge protector.
The present invention proposes a kind of scanning detection method of flat-panel screens, be applicable to a plurality of shift registers that detect around the display panel periphery, 1 pair 1 output terminal that is coupled to each shift register of control end that a plurality of transistor switches are wherein arranged, and an end of a plurality of transistor switches couples a current potential, and the other end then couples a p-wire.The scanning detection method of this flat-panel screens at first by the test online first breakpoint and second breakpoint got, cut off first breakpoint and second breakpoint afterwards, measure cut p-wire again, and therefrom take out a corresponding waveform, judge the duty of a plurality of shift registers at last according to this waveform.
According to the scanning detection method of the described flat-panel screens of preferred embodiment of the present invention, wherein, current potential is a logic high potential.And duty comprises normal operating conditions and abnormal working position.Wherein, normal operating conditions is a logic high, and abnormal working position is a logic low.
According to the scanning detection method of the described flat-panel screens of preferred embodiment of the present invention, wherein, p-wire is along short-circuited conducting sleeve of shift register coiled of display panel, and more comprises discharge protector in p-wire.
The present invention proposes a kind of flat-panel screens, comprises a plurality of shift registers, a plurality of transistor switches and a p-wire.Shift register is respectively in order to transmit signal.Each transistor switch has first end, second end and control end, 1 pair 1 output terminal that is coupled to each shift register of these control ends, and first end of each transistor switch is coupled to a certain predetermined potential, and p-wire then is coupled to second end of these transistor switches.
The present invention proposes a kind of electronic installation, and it comprises video data generator and a flat-panel screens, then comprises a plurality of shift registers in the flat-panel screens, a plurality of transistor switches and a p-wire.Wherein, the video data generator produces a video data and is passed to flat-panel screens, and flat-panel screens then receives this video data and displays it.Shift register is respectively in order to transmit the signal according to the video data gained.Each transistor switch has first end, second end and control end, 1 pair 1 output terminal that is coupled to each shift register of these control ends, and first end of each transistor switch is coupled to a certain predetermined potential, and p-wire then is coupled to second end of these transistor switches.
The present invention is because of adopting the scanning detection apparatus and the method for flat-panel screens, therefore, in the process that detects display panel, need not disassemble display panels, can learn by the detection signal in the p-wire and unusual shift register take place greatly about which rank of, can save analysis time, and increase the successful probability of analysis.The antistatic protection function that adds the increasable display panel of this p-wire in addition, and can not reduce the yield rate of manufacture course of products.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Figure 1A is the some of existing flat display driving circuit.
Figure 1B is the sequential chart of flat display driving circuit.
Fig. 2 is for a part of of the driving circuit of liquid crystal flat panel display and add the scanning detection apparatus of preferred embodiment of the present invention.
Fig. 3 is the sequential chart of the p-wire of preferred embodiment of the present invention.
Fig. 4 is the shift register and the p-wire distribution schematic diagram of preferred embodiment of the present invention.
Fig. 5 A adds the scanning detection apparatus of discharge protector for two short-circuited conducting sleeves of preferred embodiment of the present invention.
Fig. 5 B is the scanning detection apparatus of preferred embodiment of the present invention.Wherein, (a) be two circuit that diode is formed, and (b) be the point discharge structure Design.
Fig. 6 is the scanning detection method process flow diagram of preferred embodiment of the present invention.
Fig. 7 is the circuit block diagram of electronic installation according to an embodiment of the invention.
Reference numeral explanation]
A, B: input signal point
L1, L2: output signal
G1, G2: gate line
CS: signal wire
CS: designature line
100,110,230,240,440,752~758: shift register
120,150: transmission gate
160,170: with door
180: logic low
200,210,762~768: transistor switch
220,770: p-wire
300,310,320: waveform
410: the runic solid line
420~425: breakpoint
430~435: unusual short dot
450,540: the vertical checkout point
510: outer shroud
520: discharge protector
530: the horizontal checkout point
S610~S640: the administration step of one embodiment of the invention
70: electronic installation
75: flat-panel screens
700: the sweep signal generator
Embodiment
As the used flat-panel screens of present embodiment, please refer to Fig. 2 at liquid crystal flat panel display of this measure, Fig. 2 is for a part of of the driving circuit of liquid crystal flat panel display and add the scanning detection apparatus of preferred embodiment of the present invention.Wherein, dotted portion is a scanning detection apparatus of the present invention, comprises a plurality of transistor switches and a p-wire.At first an end of transistor switch 200 and transistor switch 210 couples a current potential VDD (for logic high potential), this current potential VDD can be provided it (all know this skill person should learn how to provide easily) by the set potential on the display circuit, come the other end of transistor switch 200 and transistor switch 210 to be coupled to p-wire 220 again, and the control end of the control end of transistor switch 200 and transistor switch 210 is coupled to the output of shift register 230 and shift register 240 respectively.And wherein the used transistor switch of present embodiment is a N transistor npn npn switch.
In the driving circuit of this liquid crystal flat panel display, a plurality of shift registers can also be opened corresponding transistor switch (as transistor switch 200 and transistor switch 210) according to this in proper order according to its output logic noble potential that puts in order.Fig. 3 is the sequential chart of the p-wire of preferred embodiment of the present invention.Please refer to Fig. 3, suppose to have 10 grades of shift registers, then can open 10 grades of corresponding transistor switches and make on the p-wire 220 output one current potential VDD, the waveform of generation is shown in 300.If the 7th grade shift register goes wrong, 8,9,10 grades shift register just can't operate as normal then, that is can't open corresponding crystal pipe switch, the waveform that makes it to present can produce the situation of voltage persistent anomaly (is low pressure at this) at the back segment of waveform shown in 310.
If the shift register generation problem of 3rd level, then all can't operate as normal with the shift register of afterwards 4-10 level, can't open the corresponding transistor switch of 3-10 level, and the waveform that presents can produce the situation of voltage persistent anomaly (is low pressure at this) at the back segment of waveform shown in 320.Corresponding to go out approximately be that problem has appearred in which rank of shift register as long as get final product according to the proportionate relationship of conducting in the waveform and not conducting like this.
Please refer to Fig. 4, Fig. 4 is the shift register and the p-wire distribution schematic diagram of preferred embodiment of the present invention.Wherein the parts in the runic solid line 410 are display panel, are used for display frame.Only draw among the figure relativeness between shift register, p-wire and the display panel, the shift register of vertical component is the part that belongs to gate driver circuit, and the shift register of horizontal component is the part that belongs to source electrode drive circuit, the output of figure superior displacement register is connected to p-wire through transistor switch, p-wire then forms a short-circuited conducting sleeve around display panel, and the test point that is connected to the liquid crystal flat panel display outside is in order to follow-up test operation.
This p-wire can be in cutting off forming breakpoint Anywhere, these breakpoints and nonessential to be present in test online, but, p-wire is blocked for some specific situation.Next the function of the breakpoint that some may occur is described.Suppose to be positioned at the transistor switch on unusual short dot 430 and 435, because of making the bad unusual short circuit (being grid and source electrode short circuit) that causes, the mode that then can use laser cutting respectively breakpoint 423 and 424 and breakpoint 420 and 421 places cut off p-wire and make circuit working normal, and this action can't reduce the rate that manufactures a finished product of liquid crystal flat panel display.
Moreover, the time generally p-wire can be cut into level and vertical two sections in test.Its mode of operation so can be put the waveform that measures vertical component on 450 in vertical checkout for causing breakpoint 422 and 425 with the laser cutting p-wire, judges that according to its waveform which generation problem the shift register of vertical component approximately is.In like manner, can measure the waveform of horizontal component at horizontal checkout point 452, also where the decision problem point occurs in according to this.
And p-wire forms a short-circuited conducting sleeve around display panel among Fig. 4, also has the another one benefit, can prevent the interference of external static or electric charge exactly.Utilize this notion can design the form of two short-circuited conducting sleeves, please refer to Fig. 5 A, Fig. 5 A adds the scanning detection apparatus of discharge protector for two short-circuited conducting sleeves of preferred embodiment of the present invention.Increase an outer shroud 510 in the outermost of liquid crystal flat panel display, be used to the interference (and shift register is included among two driving circuits) of protecting source electrode drive circuit and gate drive circuit not to be subjected to static.
The online discharge protector 520 of Fig. 5 A test is used to prevent the injury of unnecessary static to circuit, and its form can be shown in Fig. 5 B, but is not limited thereto.Fig. 5 B is the discharge protector of preferred embodiment of the present invention, and wherein (a) is two circuit that diode is formed, two side joint VDD and VSS, indirect p-wire.Or shown in (b), adopt the point discharge structure Design, allly know this skill person and should design this discharge protector easily.And horizontal checkout point 530 among Fig. 5 A and vertical checkout point 540 can design on frame or sapwood around the liquid crystal flat panel display, in order to maintenance in the future or test.
Please refer to Fig. 6, Fig. 6 is the scanning detection method process flow diagram of preferred embodiment of the present invention, at first by online first breakpoint and second breakpoint (step S610) got of test, as breakpoint 422 and breakpoint 425 (see figure 4)s, which part is this step can should select in according to the actual unusual point of situation judging again.
Cut off first breakpoint and second breakpoint (step S620) afterwards, this step can be with previous selected two breakpoints of laser cutting.
Measure cut p-wire again, and therefrom take out a corresponding waveform (step S630).For instance, as promptly can be cut into two sections of horizontal component and vertical components with two breakpoints of laser cutting (422 and 425), if need learn where problem occurs in, can measure once by horizontal component, vertical component is measured once, and takes out waveform separately.
Judge the duty (step S640) of shift register at last according to this waveform, when normal operating conditions when the signal that gets of the online amount of test is logic high, in case abnormal working position occurs, then can get the signal of logic low unusually in the online amount of test.But the conducting situation determined level of logic high and logic low part or vertical component approximately are which rank of shift register goes wrong on the waveform according to this.
Please refer to Fig. 7, it is the circuit block diagram of electronic installation according to an embodiment of the invention.A sweep signal generator 700 and a flat-panel screens 75 on electronic installation 70, have been comprised.A plurality of shift registers 752~754, transistor switch 762~768 and p-wire 770 have been comprised in the flat-panel screens 75.Video data is provided to flat-panel screens 75, and the horizontal time-base that cooperates sweep signal generator 700 to be produced with shift register 752~754 transmits corresponding video data, in addition, and transmit the vertical scanning signal that self-scanning signal generator 700 is produced by shift register 756~758, in the hope of correctly showing aforesaid video data.At this, the shift register 752~758 in the flat-panel screens 75, transistor switch 762~768 are identical with aforementioned several embodiment with coupling mode between the p-wire 770, no longer repeat at this.
In aforesaid each embodiment, scanning detection apparatus (comprising transistor switch and p-wire) is the output that is used to detect shift register, but based on identical principle, this scanning detection apparatus also can be used for detecting other parts in the available circuit (as among Fig. 1 with door 160, with door 170) output.Moreover, because this scanning detection apparatus is to utilize whether switch can be its principle of work because of the output conducting preset potential of shift register, so it also can be applied on the flat-panel screens driving circuit of other type except driving circuit shown in Figure 2.
In sum, the scanning detection apparatus of flat-panel screens of the present invention in the process that detects display panel, need not be disassembled display panels, can learn by the detection signal in the p-wire and unusual shift register take place, can save analysis time greatly about which rank of.The shift register that externally utilizes p-wire which rank of just can measure occurs unusual, increase to analyze probalility of success, and p-wire increased the antistatic protection function of display panel around mode.This device is placed in the technology of making panel, can't reduces the yield rate of manufacture course of products, and be very helpful for the test process of Products Development.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.

Claims (17)

1. the scanning detection apparatus of a flat-panel screens is applicable to a plurality of shift registers that detect around the display panel periphery, and the scanning detection apparatus of this flat-panel screens comprises:
A plurality of transistor switches, each described transistor switch has first end, second end and control end, 1 pair 1 output terminal that is coupled to each described shift register of the control end of each described transistor switch, first end of each described transistor switch is coupled to a logic high potential; And
One p-wire is coupled to second end of described transistor switch.
2. the scanning detection apparatus of flat-panel screens as claimed in claim 1, wherein, described transistor switch is a N transistor npn npn switch.
3. the scanning detection apparatus of flat-panel screens as claimed in claim 1, wherein, this p-wire is along short-circuited conducting sleeve of shift register coiled of display panel.
4. the scanning detection apparatus of flat-panel screens as claimed in claim 3, wherein, this p-wire coiled a pair of short-circuited conducting sleeve, this pair short-circuited conducting sleeve comprise a ring and an outer shroud in one, should interiorly encircle between display panel and described shift register, this outer shroud is positioned at outside the described shift register.
5. the scanning detection apparatus of flat-panel screens as claimed in claim 1, this p-wire more comprises a discharge protector.
6. the scanning detection method of a flat-panel screens, be applicable to a plurality of shift registers that detect around the display panel periphery, 1 pair 1 output terminal that is coupled to each described shift register of the control end of a plurality of transistor switches, and each described transistor switch one end couples a logic high potential, the other end then couples a p-wire, and the scanning detection method of this flat-panel screens comprises:
On this p-wire, get first breakpoint and second breakpoint;
Cut off this first breakpoint and this second breakpoint;
Measure cut this p-wire, and therefrom take out a corresponding waveform; And
Judge a duty of described shift register according to this waveform.
7. the scanning detection method of flat-panel screens as claimed in claim 6, wherein, this duty comprises a normal operating conditions and an abnormal working position, and this normal operating conditions is a logic high and this abnormal working position is a logic low.
8. the scanning detection method of flat-panel screens as claimed in claim 6, wherein, this p-wire is along short-circuited conducting sleeve of shift register coiled of display panel.
9. the scanning detection method of flat-panel screens as claimed in claim 6, this p-wire more comprises a discharge protector.
10. flat-panel screens comprises:
A plurality of shift registers are respectively in order to transmit a signal;
A plurality of transistor switches, each described transistor switch has first end, second end and control end, 1 pair 1 output terminal that is coupled to each described shift register of the control end of each described transistor switch, first end of each described transistor switch is coupled to a logic high potential; And
One p-wire is coupled to second end of described transistor switch.
11. flat-panel screens as claimed in claim 10, wherein, this p-wire is along short-circuited conducting sleeve of shift register coiled of display panel.
12. flat-panel screens as claimed in claim 11, wherein, this p-wire coiled a pair of short-circuited conducting sleeve, this pair short-circuited conducting sleeve comprise a ring and an outer shroud in one, should interiorly encircle between display panel and described shift register, this outer shroud is positioned at outside the described shift register.
13. flat-panel screens as claimed in claim 10, this p-wire more comprises a discharge protector.
14. an electronic installation is applicable to show a video data, comprising:
The one scan signal generator produces a horizontal time-base and a vertical scanning signal; And
One flat-panel screens receives and shows this video data, comprising:
A plurality of first shift registers, according to this horizontal time-base to transmit this video data;
A plurality of second shift registers transmit this vertical scanning signal;
A plurality of transistor switches, each described transistor switch has first end, second end and control end, 1 pair 1 of the control end of each described transistor switch be coupled to each described first or the output terminal of second shift register, first end of each described transistor switch is coupled to a logic high potential; And
One p-wire is coupled to second end of described transistor switch.
15. electronic installation as claimed in claim 14, wherein, this p-wire is along short-circuited conducting sleeve of the described first or second shift register coiled of display panel.
16. electronic installation as claimed in claim 15, wherein, this p-wire coiled a pair of short-circuited conducting sleeve, this pair short-circuited conducting sleeve comprise a ring and an outer shroud in one, should interiorly encircle between the display panel and described first or second shift register, this outer shroud is positioned at outside described first or second shift register.
17. electronic installation as claimed in claim 14, this p-wire more comprises a discharge protector.
CNB200610065795XA 2006-03-16 2006-03-16 The scanning detection apparatus of flat-panel screens and method Expired - Fee Related CN100547416C (en)

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CN103280177B (en) * 2012-12-05 2016-05-18 上海中航光电子有限公司 Gate drivers and detection method thereof
CN104809970B (en) 2015-05-14 2017-11-28 京东方科技集团股份有限公司 method for detecting display panel
CN105468127B (en) * 2015-11-24 2018-11-13 深圳市共济科技股份有限公司 A kind of real-time data acquisition system and its power failure data storage circuit, method
CN105513518B (en) * 2016-02-29 2018-05-08 京东方科技集团股份有限公司 A kind of gate driving circuit and its test method, display device
CN106782252B (en) * 2017-02-13 2019-11-26 武汉华星光电技术有限公司 The detection device and method of array substrate horizontal drive circuit
CN108648703B (en) * 2018-03-27 2021-05-14 厦门天马微电子有限公司 Display panel and display device
CN108831359B (en) * 2018-06-22 2020-08-11 惠科股份有限公司 Display panel and display device thereof
CN109345988B (en) * 2018-11-21 2021-04-30 惠科股份有限公司 Test circuit, display panel test device and display device
CN111489672B (en) * 2020-06-15 2023-08-15 业成科技(成都)有限公司 Display panel, electronic device, and control method of display panel

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