CN1324553C - Method for checking LCD device - Google Patents
Method for checking LCD device Download PDFInfo
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- CN1324553C CN1324553C CNB031102484A CN03110248A CN1324553C CN 1324553 C CN1324553 C CN 1324553C CN B031102484 A CNB031102484 A CN B031102484A CN 03110248 A CN03110248 A CN 03110248A CN 1324553 C CN1324553 C CN 1324553C
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Optics & Photonics (AREA)
- General Engineering & Computer Science (AREA)
- Liquid Crystal (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The present invention can reduce time required to conduct inspection of a liquid crystal display having an icon display section and a dot matrix display section. An electrode short circuit inspection of the icon display section is conducted by successively or simultaneously displaying a display pattern, in which one or more line units are repeated, on the dot matrix display section that commonly utilizes data lines with the icon display section.
Description
Technical field
The present invention relates to the inspection method of liquid crystal indicator.
Background technology
The display frame of liquid crystal indicator that is used to have the mancarried device of display part has the dot matrix display part mostly and two in graphic presentation portion shows key element.For example, in mobile phone, show telephone number and literal, at the state and the battery remaining amount of graphic presentation portion demonstration electric wave, perhaps other symbol and mark at the dot matrix display part.Here the majority of employed liquid crystal display cells sees it is that data line with the dot matrix display part is connected with the graph segments of graphic presentation portion from the easy degree of cost and driving, increase the scanning electrode wire of dot matrix portion, and the scanning electrode wire of dot matrix portion is used as the graph segments scanning electrode wire.
Like this, with regard to connection, a graph segments of graphic presentation portion has following advantage: 1) can drive as a point of dot matrix display part, it is simple that drive controlling becomes, 2) because figure can be not being that the mode of set of point shows, with compare shape can clearly show, 3 with the situation of dot matrix display graphics shape) need not to form the pattern generator of graphics shape with point.
In general, because count (=transversely arranged counting=the number of data lines) of a scanning electrode wire of the number of graph segments comparison is few, the part of the data line of dot matrix portion respectively is connected with graph segments.
In the manufacturing process of such mobile phone, screen defect for the dot matrix portion that checks display frame, particularly line open circuit and line short circuit will carry out that demonstration is turn-offed in whole image conducting demonstration, whole image, whole image is the alternate grid-like demonstration of break-make (hereinafter to be referred as grid-like demonstration).In addition, for having or not of short circuit between the transparency electrode in the graphic presentation portion that checks display frame, as shown in Figure 5, successively each graph segments is lighted.This be because the situation that the short circuit possibility arranged in dot matrix portion only between 2 data lines of front and back adjacency, and in graphic presentation portion because of 1 data line and the data line adjacency more than 2, the cause with the possibility of data line short circuit more than 2 is often arranged.
If with Fig. 2 is that example describes, then show to the figure that shows the battery remaining amount by the figure that shows the electric wave state in the upper right side of Fig. 2, upper left side and the lead-out wiring of the data line that graph segments separately constitutes.The details of graph segments separately have been shown in Fig. 3 and Fig. 4 in addition.Figure 23 illustrates the line of common electrode, figure 24 illustrates the line of segment electrode.
Here, the graph segments that is connected with S19 is with graph segments that is connected with S18 and the graph segments adjacency that is connected with S20.Because the short circuit between data line can be caused by 2 kinds of situations between S18-S19 and between S19-S20, as long as these 2 groups of inspections are just enough.But, the graph segments that is connected with S16 but with figure portion or dot matrix portion in S15, S17, these 3 data line adjacency of S18.Therefore, concerning S16, just be necessary to check S15-S16, S16-S17, these 3 kinds of situations of S16-S18, promptly 3 groups of data short-circuits between conductors has or not.
If there is the short circuit between transparency electrode, then when lighting a graph segments, the short circuit part is just connected, and also another graph segments is applied voltage, and the graph segments that originally should not light is also lighted simultaneously.Thereby, the show state in the time of can each graph segments being lighted successively by observation, the graph segments beyond the affirmation order is not lighted, with having or not of short circuit between the transparency electrode of checking the figure display part.
Between the transparency electrode of checking the figure display part, during the having or not of short circuit, as shown in Figure 5, light each graph segments successively, check very time-consuming.In addition, light sweep time if shorten in order to shorten the supervision time, then the time of lighting of shorted segment also shortens, and unacceptable product leaks the situation of seeing to be increased, thereby is difficult to shorten the supervision time.Because the overlooker is watching the graph segments of lighting successively attentively always, eyes are easy to fatigue.
Summary of the invention
In dot matrix portion, carry out 1 grid-like demonstration, 2 grid-like demonstrations, 3 grid-like demonstrations, 4 multiple grid-like demonstrations such as grid-like demonstration successively or simultaneously.In figure portion, do not show.Even in dot matrix portion, also carry out above-mentioned grid-like demonstration if in figure portion, do not show, then accordingly per 1 row of data segment, per 2 row, per 3 row, per 4 row are applied different voltage, also to applying identical voltage with graph segments that data segment connects with each of each grid-like demonstration.When between certain a pair of graph segments electric pole short circuit being arranged, if carry out this right section is applied the grid-like demonstration of different voltages, then in the dot matrix display part of this segment electrode abnormal show appears.As being that the white example that just is shown as describes for black, the non-voltage application portion of lighting to light voltage application portion, then light voltage and be pulled down to the non-voltage of lighting, become low-voltage, black demonstration becomes somber and shows; The non-voltage of lighting is drawn high and is lighted voltage, and originally white demonstration but becomes somber and shows under high voltage.That is to say that the poor short circuit that detects graph segments portion by the show state of observing dot matrix portion becomes possibility.
In addition, at this moment, because the current sinking value becomes greater than normal value, by monitoring the current sinking value, the poor short circuit that detects graph segments portion becomes possibility simultaneously.Because of the current sinking value becomes greater than normal value, the thermal value that constitutes the electronic unit of driving circuit increases, thereby by supervision thermal values such as application of temperature writing-methods, the poor short circuit that detects graph segments portion becomes possibility.Usually, the internal driving of power circuit is very not little.Along with the increase of current sinking, liquid crystal drive voltage becomes and is lower than normal value, thereby by monitoring the liquid crystal drive voltage value, the poor short circuit that detects graph segments portion becomes possibility.
Description of drawings
Fig. 1 is the figure that the example of the present invention the 2nd embodiment is shown.
Fig. 2 is the figure that the liquid crystal panel among the present invention the 1st embodiment is shown.
Fig. 3 is the detail drawing that the figure portion of the liquid crystal panel among the present invention the 1st embodiment is shown.
Fig. 4 is the detail drawing that another figure portion of the liquid crystal panel among the present invention the 1st embodiment is shown.
Fig. 5 is the figure that the DISPLAY ORDER that existing figure portion checks is shown.
Fig. 6 is the figure that an example of the 1st display frame among the present invention the 1st embodiment is shown.
Fig. 7 is the figure that an example of the 2nd display frame among the present invention the 1st embodiment is shown.
Fig. 8 is the figure that an example of the 3rd display frame among the present invention the 1st embodiment is shown.
Fig. 9 is the figure that an example of the 4th display frame among the present invention the 1st embodiment is shown.
Figure 10 is the figure that another example of the 2nd display frame among the present invention the 1st embodiment is shown.
Figure 11 is the figure that another example of the 2nd display frame among the present invention the 1st embodiment is shown.
Figure 12 is the figure that another example among the present invention the 2nd embodiment is shown.
Figure 13 is the figure that another example among the present invention the 2nd embodiment is shown.
Figure 14 is the complete list that possible inspection is made up.
Figure 15 be illustrate among the present invention the 1st embodiment electric pole short circuit is arranged the time the figure of an example of the 1st display frame.
Figure 16 be illustrate among the present invention the 1st embodiment electric pole short circuit is arranged the time figure of one example of abnormal show appears in the 2nd display frame.
Figure 17 be illustrate among the present invention the 1st embodiment electric pole short circuit is arranged the time figure of one example of abnormal show appears in the 3rd display frame.
Figure 18 be illustrate among the present invention the 1st embodiment electric pole short circuit is arranged the time the figure of an example of the 4th display frame.
Figure 19 be illustrate among the present invention the 1st embodiment another kind of electric pole short circuit is arranged the time the figure of an example of the 1st display frame.
Figure 20 be illustrate among the present invention the 1st embodiment another kind of electric pole short circuit is arranged the time the figure of an example of the 2nd display frame.
Figure 21 be illustrate among the present invention the 1st embodiment another kind of electric pole short circuit is arranged the time the figure of an example of the 3rd display frame.
Figure 22 be illustrate among the present invention the 1st embodiment another kind of electric pole short circuit is arranged the time figure of one example of abnormal show appears in the 4th display frame.
Figure 23 is the detail drawing that the common electrode line of the liquid crystal panel among the present invention the 1st embodiment is shown.
Figure 24 is the detail drawing that the segment electrode line of the liquid crystal panel among the present invention the 1st embodiment is shown.
Embodiment
With regard to the inspection method of liquid crystal indicator of the present invention, in the liquid crystal indicator that has these 2 demonstrations of graphic presentation portion and dot matrix display part key element at least, in the graphic presentation portion that shows key element as, do not show, and in the dot matrix portion that shows key element as another, carry out 1 grid-like demonstration, 2 grid-like demonstrations, 3 grid-like demonstrations, 4 multiple grid-like demonstrations such as grid-like demonstration successively or simultaneously.Here, so-called 1 grid-like demonstration is meant that 1 white point and 1 stain are the alternately repeated display graphics of unit (with reference to Fig. 6) at both direction in length and breadth with 1 point.In addition, so-called 2 grid-like demonstrations, be meant by each 2 point in length and breadth, amount to white figure that 4 points constitute and by each 2 point in length and breadth, to amount to black figure that 4 points constitute be the alternately repeated display graphics of unit (with reference to Fig. 7) at both direction in length and breadth with 2 points.3 grid-like demonstrations, 4 grid-like demonstrations also are same (with reference to Fig. 8, Fig. 9).
Consider the grid-like demonstration of various points here.If, see that then repeating successively with 1 point by 1 grid-like display mode is the white and black display graphics of unit with a scan-electrode width intercepting display frame.In addition, repeating successively with 2 points by 2 grid-like display modes in addition is the white and black display graphics of unit; Repeating successively with 3 points by 3 grid-like display modes is the white and black display graphics of unit; Repeating successively with 4 points by 4 grid-like display modes is the white and black display graphics of unit.Accordingly per 1 row of data segment, per 2 row, per 3 row, per 4 row are applied different voltage with each of each grid-like demonstration.
Even in dot matrix portion, also carry out above-mentioned grid-like demonstration if in graphic presentation portion, do not show, then accordingly per 1 row of data segment, per 2 row, per 3 row, per 4 row are applied different voltage, also to applying identical voltage with graph segments that data segment connects with each of each grid-like demonstration.When between certain a pair of graph segments electric pole short circuit being arranged, if carry out this right section is applied the grid-like demonstration of different voltages, then in the dot matrix display part of this segment electrode abnormal show appears.As being that the white example that just is shown as describes for black, the non-voltage application portion of lighting to light voltage application portion, then light voltage and be pulled down to the non-voltage of lighting, become low-voltage, black demonstration becomes somber and shows; The non-voltage of lighting is drawn high and is lighted voltage, and originally white demonstration but becomes somber and shows under high voltage.That is to say, show as another that show state of the dot matrix display part of key element detects as a poor short circuit that shows the graph segments portion of key element and become possibility by observing.
In addition, at this moment, owing to flow through the short-circuit current of self-electrode, the current sinking value of liquid crystal indicator becomes greater than normal value simultaneously, and by monitoring the current sinking value, the poor short circuit that detects graph segments portion becomes possibility.If the current sinking value becomes greater than normal value, the thermal value that then constitutes the electronic unit of driving circuit increases.Therefore, by supervision thermal values such as methods such as application of temperature writing-method, the poor short circuit that detects graph segments portion becomes possibility.Usually, the internal driving of power circuit is very not little, and along with current sinking increases, liquid crystal drive voltage becomes and is lower than normal value.Therefore, by monitoring the liquid crystal drive voltage value, the poor short circuit that detects graph segments portion becomes possibility.
[embodiment]
Below, with reference to the description of drawings embodiments of the invention.
(embodiment 1)
Fig. 6 is the synoptic diagram of the 1st display frame among the present invention the 1st embodiment.Here, just to show, be that the white example that just is shown as describes for black, the non-voltage application portion of lighting just to light voltage application portion.The graticule that it is unit that the dot matrix portion of Fig. 6 demonstrates with 1 point.Figure portion does not carry out any demonstration.
Here, consideration is in the generation of the electric pole short circuit of pattern electrodes portion.If at the pattern electrodes that is connected to the even number segment electrode and be connected between the pattern electrodes of odd number segment electrode and cause short circuit, then abnormal show appears in the dot matrix display part at this segment electrode.That is to say that in normal grid-like demonstration, although the even number segment electrode is different with the drive waveforms at odd number segment electrode place, as in the place's short circuit of figure portion, then lights voltage and be pulled down to the non-voltage of lighting, black demonstration becomes somber and shows; The non-voltage of lighting is drawn high and is lighted voltage, and white demonstration but becomes somber and shows.The current sinking value becomes greater than normal value simultaneously, and thermal value increases, and liquid crystal drive voltage descends.
Thereby, can detect at the pattern electrodes that is connected to the even number segment electrode and be connected to electric pole short circuit between the pattern electrodes of odd number segment electrode with show state, current sinking, thermal value, the driving voltage of dot matrix portion.
Fig. 7 is the synoptic diagram of the 2nd display frame among the present invention the 1st embodiment.The graticule that it is unit that the dot matrix portion of Fig. 7 demonstrates with 2 points.Figure portion does not carry out any demonstration.Here, for the purpose of illustrating, suppose that n is a natural number, 4n segment electrode and 4n+1 segment electrode of dot matrix portion is called group 1,4n+2 segment electrode and 4n+3 segment electrode are called organize 2.
If cause short circuit at the pattern electrodes that is connected to group 1 segment electrode with being connected between the pattern electrodes of organizing 2 segment electrode, then in the dot matrix display part of this segment electrode, abnormal show occurs.That is to say that in normal 2 grid-like demonstrations, the segment electrode of group 1 is different with the drive waveforms at the segment electrode place of group 2.4n segment electrode of short circuit or 4n+1 segment electrode and 4n+2 segment electrode or 4n+3 segment electrode are not applied normal drive waveforms.The current sinking value becomes greater than normal value simultaneously, and thermal value increases, and liquid crystal drive voltage descends.
Thereby, can detect at the pattern electrodes that is connected to 4n segment electrode or 4n+1 segment electrode equally and be connected to electric pole short circuit between the pattern electrodes of 4n+2 segment electrode or 4n+3 segment electrode with show state of dot matrix portion etc.
Fig. 8 is the synoptic diagram of the 3rd display frame among the present invention the 1st embodiment.The graticule that it is unit that the dot matrix portion of Fig. 8 demonstrates with 3 points.Figure portion does not carry out any demonstration.Here, for the purpose of illustrating, suppose that n is a natural number, 6n segment electrode, a 6n+1 segment electrode, a 6n+2 segment electrode of dot matrix portion is called group 1,6n+3 segment electrode, a 6n+4 segment electrode, a 6n+5 segment electrode are called organize 2.
If cause short circuit at the pattern electrodes that is connected to group 1 segment electrode with being connected between the pattern electrodes of organizing 2 segment electrode, then in the dot matrix display part of this segment electrode, abnormal show occurs.That is to say that in normal 3 grid-like demonstrations, the segment electrode of group 1 is different with the drive waveforms at the segment electrode place of group 2.6n segment electrode of short circuit or 6n+1 segment electrode or 6n+2 segment electrode and 6n+3 segment electrode or 6n+4 segment electrode or 6n+5 segment electrode are not applied normal drive waveforms.The current sinking value becomes greater than normal value simultaneously, and thermal value increases, and liquid crystal drive voltage descends.
Thereby, can detect at the pattern electrodes that is connected to 6n segment electrode or 6n+1 segment electrode or 6n+2 segment electrode equally and be connected to electric pole short circuit between the pattern electrodes of 6n+3 segment electrode or 6n+4 segment electrode or 6n+5 segment electrode with show state of dot matrix portion etc.
Fig. 9 is the synoptic diagram of the 4th display frame among the present invention the 1st embodiment.The graticule that it is unit that the dot matrix portion of Fig. 9 demonstrates with 4 points.Figure portion does not carry out any demonstration.Here, for the purpose of illustrating, suppose that n is a natural number, 8n segment electrode, a 8n+1 segment electrode, a 8n+2 segment electrode, a 8n+3 segment electrode of dot matrix portion are called group 1,8n+4 segment electrode, a 8n+5 segment electrode, a 8n+6 segment electrode, a 8n+7 segment electrode are called group 2.
If cause short circuit at the pattern electrodes that is connected to group 1 segment electrode with being connected between the pattern electrodes of organizing 2 segment electrode, then in the dot matrix display part of this segment electrode, abnormal show occurs.That is to say that in normal 4 grid-like demonstrations, the segment electrode of group 1 is different with the drive waveforms at the segment electrode place of group 2.If a certain segment electrode in a certain segment electrode in 8n segment electrode, a 8n+1 segment electrode, a 8n+2 segment electrode or 8n+3 the segment electrode and 8n+4 segment electrode, a 8n+5 segment electrode, a 8n+6 segment electrode or 8n+7 the segment electrode is short-circuited, then the group to short circuit does not apply normal drive waveforms.The current sinking value becomes greater than normal value simultaneously, and thermal value increases, and liquid crystal drive voltage descends.
Thereby, can detect electric pole short circuit between a certain segment electrode in a certain segment electrode in 8n segment electrode, a 8n+1 segment electrode, a 8n+2 segment electrode or 8n+3 segment electrode and 8n+4 segment electrode, a 8n+5 segment electrode, a 8n+6 segment electrode or 8n+7 the segment electrode equally with show state of dot matrix portion etc.
Figure 14 shows the complete list of summarizing each shown in this liquid crystal indicator display graphics and the possible relation that is examined graph segments.
Below show concrete graph segments electric pole short circuit and several examples of abnormal show.The example that shown is in the pattern electrodes place generating electrodes short circuit that is connected to S1 segment electrode and S11 segment electrode.In this panel, demonstrate 1 graticule, 2 graticules, 3 graticules, 4 graticules successively.Figure 15 is the situation that demonstrates 1 graticule.By common electrode is shown by the scanning that from top to bottom line carries out horizontal direction in proper order.The S1 segment electrode is identical with the displaying contents of S11 segment electrode.Even between this electrode, cause electric pole short circuit and since short circuit two electrodes between do not have potential difference (PD), so do not cause abnormal show.Figure 16 is the situation that demonstrates 2 graticules.Here, the displaying contents of S 1 segment electrode is different with the displaying contents of S11 segment electrode.When connection short circuit part short circuit current flow, the voltage that is added on the segment electrode forms white demonstration and the middle grey demonstration of black demonstration.The size of viewing area is 35mm * 25mm, be 96 point * 64 point+graphic presentations, the S1D10605 that the Seiko Epson that has used built-in booster circuit to produce 4 multiplication of voltages in inside makes is as liquid crystal driver IC, at liquid crystal drive voltage is that 8.2V, supply voltage are that current sinking rises to 1mA from 500 μ A under the situation of Liquid Crystal Module of 3.0V.Along with the rising of current sinking, the current sinking around the built-in booster circuit of liquid crystal driver increases, and the packaging body temperature of liquid crystal driver IC rises.Figure 17 is the situation that demonstrates 3 graticules.Here, the displaying contents of S1 segment electrode is different with the displaying contents of S11 segment electrode.When connection short circuit part short circuit current flow, the voltage that is added on the segment electrode forms white demonstration and the middle grey demonstration of black demonstration.Figure 18 is the situation that demonstrates 4 graticules.The S1 segment electrode is identical with the displaying contents of S11 segment electrode.Since short circuit two electrodes between do not have potential difference (PD), so do not cause abnormal show.
Then, show example in the pattern electrodes place generating electrodes short circuit that is connected to S3 segment electrode and S7 segment electrode.On this panel, demonstrate 1 graticule, 2 graticules, 3 graticules, 4 graticules successively.Figure 19 is the situation that demonstrates 1 graticule.Figure 20 is the situation that demonstrates 2 graticules.Figure 21 is the situation that demonstrates 3 graticules.In these 3 display graphics, the S3 segment electrode is identical with the displaying contents of S7 segment electrode.Since short circuit two electrodes between do not have potential difference (PD), so do not cause abnormal show.Figure 22 is the situation that demonstrates 4 graticules.Here, the displaying contents of S3 segment electrode is different with the displaying contents of S7 segment electrode.When connection short circuit part short circuit current flow, the voltage that is added on the segment electrode forms white demonstration and the middle grey demonstration of black demonstration.
If embodiment is so far concluded, and suppose that n is a natural number, m is the integer more than 0, then in the grid-like demonstration of n point, can detect betwixt the short circuit in the ranks that clips (n-1+mn) row.That is to say, can detect the short circuit between even number line and odd-numbered line in 1 graticule; Short circuit between the adjacent rows when in 2 graticules, clipping (1+2m) row betwixt; Short circuit between the adjacent rows when in 3 graticules, clipping (2+3m) row betwixt.N is that the situation more than 5 also is same.
Like this, by showing 1 graticule, 2 graticules, 3 graticules, 4 graticules successively, can detect respectively short circuit between adjacent rows, betwixt pressed from both sides 1 row every the short circuits in the ranks of 2 row, betwixt pressed from both sides 2 row every the short circuits in the ranks of 3 row, pressed from both sides the short circuits in the ranks every 4 row of 3 row betwixt.
In addition, the example that has with another the 2nd display frame of the 2nd display frame effect same has been shown in Figure 10, Figure 11.
(the 2nd embodiment)
Now the 2nd embodiment is described with Fig. 1.In Fig. 1, zone 5 demonstrates 1 graticule.Zone 6 demonstrates 2 graticules.Zone 7 demonstrates 3 graticules.Zone 8 demonstrates 4 graticules.
Like this, with regard to demonstration, can detect in the lump shown in the 1st embodiment from the electric pole short circuit described in the 1st display frame to the 4 display frames.
Display panels generally shows display frame with the line sequential scanning.Therefore, the time of 1 picture of demonstration can be divided into following 5 parts: the time of (1) display graphics portion; (2) time of 1 grid portion of demonstration; (3) time of 2 grid portions of demonstration; (4) time of 3 grid portions of demonstration; (5) time of 4 grid portions of demonstration.Therefore, the time of above-mentioned (2) to (5) switches in the data line signal that switches each display graphics in the same display graphics in available a plurality of display graphics.The example of another display frame of embodiment 2 has been shown in Figure 12, Figure 13 in addition.
The present invention according to above explanation, when the electric pole short circuit of graphic presentation portion is checked, by observing the dot matrix display part but not the show state of graphic presentation portion, short-circuit detecting becomes possibility, can be not in order the display graphics display part at short notice and seldom implement to show and check in omission ground.
Claims (6)
1. the inspection method of a liquid crystal indicator, this liquid crystal indicator has graphic presentation portion and dot matrix display part, wherein, the segment electrode of above-mentioned graphic presentation portion is connected with the segment electrode of above-mentioned dot matrix display part, the segment electrode of adjacency is not in above-mentioned graphic presentation portion adjacency at above-mentioned dot matrix display part, and the inspection method of this liquid crystal indicator is characterised in that:
Above-mentioned segment electrode is divided into first group and second group,
Apply second shows signal different to above-mentioned second group when applying first shows signal, thereby above-mentioned dot matrix display part shown with first shows signal to above-mentioned first group,
The show state of above-mentioned dot matrix display part, become the somber show state having applied the pixel that to deceive the shows signal of demonstration, when the pixel that has perhaps applied the shows signal that should show in vain becomes the somber show state, though detect in above-mentioned dot matrix display part not adjacency, the segment electrode of adjacency has electric pole short circuit in above-mentioned graphic presentation portion.
2. the inspection method of liquid crystal indicator as claimed in claim 1 is characterized in that:
Above-mentioned first group and above-mentioned second group is formed by a segment electrode respectively, and above-mentioned first shows signal and above-mentioned second shows signal are applied in simultaneously.
3. the inspection method of liquid crystal indicator as claimed in claim 1 is characterized in that:
Above-mentioned second shows signal is the opposite signal of above-mentioned first shows signal.
4. the inspection method of liquid crystal indicator as claimed in claim 3 is characterized in that:
Above-mentioned first group and above-mentioned second group of segment electrode by the same line number constitute, and
After having applied above-mentioned first shows signal and above-mentioned second shows signal, on first group and second group that constitutes with the anisomerous segment electrode of above-mentioned line number, apply the first new shows signal and second shows signal respectively.
5. the inspection method of a liquid crystal indicator, this liquid crystal indicator has graphic presentation portion and dot matrix display part, wherein, the segment electrode of above-mentioned graphic presentation portion is connected with the segment electrode of above-mentioned dot matrix display part, the segment electrode of adjacency is not in above-mentioned graphic presentation portion adjacency at above-mentioned dot matrix display part, and the inspection method of this liquid crystal indicator is characterised in that:
In above-mentioned dot matrix display part, carry out multiple grid-like demonstration successively;
Show state when at this moment above-mentioned dot matrix display part, become the somber show state having applied the pixel that to deceive the shows signal of demonstration, when the pixel that has perhaps applied the shows signal that should show in vain becomes the somber show state, though detect in above-mentioned dot matrix display part not adjacency, the segment electrode of adjacency has electric pole short circuit in above-mentioned graphic presentation portion.
6. the inspection method of a liquid crystal indicator, this liquid crystal indicator has graphic presentation portion and dot matrix display part, wherein, the segment electrode of above-mentioned graphic presentation portion is connected with the segment electrode of above-mentioned dot matrix display part, the segment electrode of adjacency is not in above-mentioned graphic presentation portion adjacency at above-mentioned dot matrix display part, and the inspection method of this liquid crystal indicator is characterised in that:
In above-mentioned dot matrix display part, carry out simultaneously multiple grid-like demonstration;
The show state of the above-mentioned dot matrix display part when carrying out multiple grid-like demonstration simultaneously, become the somber show state having applied the pixel that to deceive the shows signal of demonstration, when the pixel that has perhaps applied the shows signal that should show in vain becomes the somber show state, though detect in above-mentioned dot matrix display part not adjacency, the segment electrode of adjacency has electric pole short circuit in above-mentioned graphic presentation portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP105396/02 | 2002-04-08 | ||
| JP105396/2002 | 2002-04-08 | ||
| JP2002105396 | 2002-04-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1450353A CN1450353A (en) | 2003-10-22 |
| CN1324553C true CN1324553C (en) | 2007-07-04 |
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ID=28786380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031102484A Expired - Fee Related CN1324553C (en) | 2002-04-08 | 2003-04-08 | Method for checking LCD device |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100909320B1 (en) |
| CN (1) | CN1324553C (en) |
| TW (1) | TWI281997B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220126692A1 (en) * | 2020-10-26 | 2022-04-28 | Seiko Epson Corporation | Display Device, Electronic Apparatus, And Moving Object |
| US11657743B2 (en) | 2020-10-26 | 2023-05-23 | Seiko Epson Corporation | Display driver, electronic apparatus, and moving object |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237725B (en) | 2014-09-04 | 2017-03-29 | 京东方科技集团股份有限公司 | A kind of method of the position of the short dot in determination grating device |
| CN109669094A (en) * | 2018-12-19 | 2019-04-23 | 上海帆声图像科技有限公司 | The detection device and method of signal wire in a kind of display screen |
| CN113899967A (en) * | 2021-09-08 | 2022-01-07 | 信利半导体有限公司 | Method and system for testing serial leakage pen of liquid crystal display screen |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09258704A (en) * | 1996-03-27 | 1997-10-03 | Saitama Nippon Denki Kk | Lcd display control circuit |
| JPH10240203A (en) * | 1997-02-05 | 1998-09-11 | Nokia Mobile Phones Ltd | Display device with icon line |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10207438A (en) | 1996-11-21 | 1998-08-07 | Seiko Instr Inc | Liquid crystal device |
-
2003
- 2003-03-28 TW TW092107157A patent/TWI281997B/en active
- 2003-04-08 CN CNB031102484A patent/CN1324553C/en not_active Expired - Fee Related
- 2003-04-08 KR KR1020030021912A patent/KR100909320B1/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09258704A (en) * | 1996-03-27 | 1997-10-03 | Saitama Nippon Denki Kk | Lcd display control circuit |
| JPH10240203A (en) * | 1997-02-05 | 1998-09-11 | Nokia Mobile Phones Ltd | Display device with icon line |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220126692A1 (en) * | 2020-10-26 | 2022-04-28 | Seiko Epson Corporation | Display Device, Electronic Apparatus, And Moving Object |
| US11642964B2 (en) * | 2020-10-26 | 2023-05-09 | Seiko Epson Corporation | Display device, electronic apparatus, and moving object |
| US11657743B2 (en) | 2020-10-26 | 2023-05-23 | Seiko Epson Corporation | Display driver, electronic apparatus, and moving object |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1450353A (en) | 2003-10-22 |
| KR20030081072A (en) | 2003-10-17 |
| TW200401132A (en) | 2004-01-16 |
| KR100909320B1 (en) | 2009-07-24 |
| TWI281997B (en) | 2007-06-01 |
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Granted publication date: 20070704 Termination date: 20100408 |