CN101976159A - Method for driving optical sensing array panel - Google Patents
Method for driving optical sensing array panel Download PDFInfo
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- CN101976159A CN101976159A CN 201010522761 CN201010522761A CN101976159A CN 101976159 A CN101976159 A CN 101976159A CN 201010522761 CN201010522761 CN 201010522761 CN 201010522761 A CN201010522761 A CN 201010522761A CN 101976159 A CN101976159 A CN 101976159A
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Abstract
The invention discloses a method for driving an optical sensing array panel, which is applied to the optical sensing array panel. The optical sensing array panel comprises a plurality of optical sensing strips, a plurality of scanning lines, at least one dummy optical sensing strip and at least one dummy scanning line, wherein the optical sensing strips are arranged in parallel besides the dummy optical sensing strip, the scanning lines are electrically connected with the optical sensing strips, and the dummy scanning line is electrically connected with the dummy optical sensing strip. The driving method comprises the following steps of: permeating the scanning lines, sequentially opening the optical sensing strips; and when the optical sensing strips are all not opened, permeating the dummy scanning line, and opening the dummy optical sensing strip.
Description
Technical field
The invention relates to a kind of operating handset, computing machine and personal digital aid (PDA) (Personal Digital Assistant that can be used for, the driving method of the input equipment (input equipment) of electronic installation (electronic device) such as PDA), and particularly relevant for a kind of driving method of light sensing array panel.
Background technology
To be a kind of utilization produce the input equipment of instruction to the reception or the blocking (block) of light with the light sensing array panel; and present light sensing array panel can be integrated with display usually; for example the light sensing array panel can be installed in the display screen of electronic installation, and wherein electronic installation for example is mobile phone, computing machine and personal digital aid (PDA) (PDA) etc.The user can utilize the light sensing array panel to come input instruction to above-mentioned electronic installation, with operating electronic devices, and views and admires show image from the light sensing array panel.
The light sensing array panel generally includes a plurality of light sensing unit and multi-strip scanning lines (scan line) that are arranged.The light sensing unit that is arranged in every row can form a light sensing bar (photosensor strip), and each bar sweep trace electrically connects wherein light sensing bar, and can open this light sensing bar.When the light sensing array panel is driven, usually in regular turn input voltage signal to these sweep traces, to open these light sensing bars in regular turn.So, the light sensing array panel can come input instruction to above-mentioned electronic installation through reception or the blocking to light.
Summary of the invention
The invention provides a kind of driving method of light sensing array panel, it utilizes illusory sweep trace and illusory light sensing bar to drive the light sensing array panel.
The present invention proposes a kind of driving method of light sensing array panel, is applied to a light sensing array panel.The light sensing array panel comprises many light sensing bars, multi-strip scanning line, at least one illusory light sensing bar (dummy photosensor strip) and at least one illusory sweep trace (dummy scan line).These light sensing bars are arranged side by side each other, and the position is by illusory light sensing bar.These sweep traces electrically connect these light sensing bars, and illusory sweep trace electrically connects illusory light sensing bar.Driving method comprises, sees through these sweep traces, opens these light sensing bars in regular turn.When these light sensing bars are not all opened, see through illusory sweep trace, open illusory light sensing bar.
In an embodiment of the present invention, the step of opening these light sensing bars in regular turn comprises and imports a voltage signal in regular turn to these sweep traces.
In an embodiment of the present invention, the step of opening illusory light sensing bar comprises that input one voltage signal is to illusory sweep trace.
In an embodiment of the present invention, these light sensing bars open in regular turn during, lasting unlatching is a light sensing bar wherein, opens up to another illusory light sensing bar.
In an embodiment of the present invention, during illusory light sensing bar unlatching, continue to open illusory light sensing bar, open up to arbitrary light sensing bar.
In an embodiment of the present invention, the two quantity of above-mentioned illusory light sensing bar and illusory sweep trace is all a plurality of.When these light sensing bars are not all opened, see through these illusory sweep traces, open these illusory light sensing bars in regular turn.
In an embodiment of the present invention, these illusory light sensing bars open in regular turn during, lasting unlatching is an illusory light sensing bar wherein, opens up to another illusory light sensing bar.
In an embodiment of the present invention, above-mentioned light sensing array panel also comprises many read lines (readout line).These read lines and these sweep traces are staggered, and electrically connect these light sensing bars and illusory light sensing bar.Each bar read line is exported a sensing signal.At illusory light sensing bar open period, the magnitude of voltage of sensing signal is essentially certain value.
Based on above-mentioned, because when all light sensing bars are not all opened, see through illusory sweep trace and open illusory light sensing bar, so the present invention not only utilizes sweep trace and light sensing bar, also utilize illusory sweep trace and illusory light sensing bar to drive the light sensing array panel simultaneously.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Figure 1A is the circuit diagram of the applied light sensing array panel of the driving method of one embodiment of the invention.
Figure 1B is the time dependent synoptic diagram of voltage signal that inputs to sweep trace and illusory sweep trace among Figure 1A.
Fig. 1 C is the time dependent synoptic diagram of sensing signal that the light sensing array panel is exported among Figure 1A.
Fig. 2 A is the circuit diagram of the applied light sensing array panel of the driving method of another embodiment of the present invention.
Fig. 2 B is the time dependent synoptic diagram of voltage that inputs to sweep trace and illusory sweep trace among Fig. 2 A.
Embodiment
Figure 1A is the circuit diagram of the applied light sensing array panel of the driving method of one embodiment of the invention.See also Figure 1A, the driving method of present embodiment is applied to a light sensing array panel 100, and light sensing array panel 100 can be applicable to display, LCD (Liquid Crystal Display for example, LCD) or organic light emitting diode display flat-panel screens such as (Organic Light-Emitting Diode Display, OLED Display).
Light sensing array panel 100 comprises many light sensing bars 110, multi-strip scanning line 120, one illusory light sensing bar 130 and an illusory sweep trace 140, wherein these light sensing bars 110 are arranged side by side each other, and sweep trace 120 all can be identical with illusory sweep trace 140 on structure, material and function.Each bar light sensing bar 110 comprises a plurality of light sensing units that form a line 112, and illusory light sensing bar 130 comprises a plurality of illusory light sensing units 132 that form a line.
Each light sensing unit 112 can comprise a switch module S1 and an optical sensor P1, and in same light sensing unit 112, switch module S1 electrically connects optical sensor P1.With Figure 1A is example, and switch module S1 can be thin film transistor (TFT), and optical sensor P1 can be photistor (photo transistor), and wherein the source electrode of switch module S1 (source) connects the drain electrode (drain) of optical sensor P1.
These sweep traces 120 electrically connect these light sensing bars 110.Specifically, each bar sweep trace 120 electrically connects wherein the grid (gate) of the switch module S1 in the light sensing bar 110.In addition, the source electrode of each optical sensor P1 connects a power supply V1, and source electrode and the grid of each optical sensor P 1 electrically conduct each other, shown in Figure 1A.
Illusory light sensing unit 132 can comprise a switch module S1 and a sensor P2, and wherein switch module S1 electrically connects sensor P2, and for example the source electrode of switch module S1 connects the drain electrode of sensor P2.Illusory sweep trace 140 electrically connects illusory light sensing bar 130, and for example illusory sweep trace 140 electrically connects the grid of the switch module S1 in the illusory light sensing bar 130.In addition, the source electrode of each sensor P2 connects power supply V1, and source electrode and the grid of each sensor P2 electrically conduct each other.
Hence one can see that, light sensing unit 112 and illusory light sensing unit 132 the two circuit structure and function all essence is identical.But, optical sensor P1 can receive light, and sensor P2 can't receive light.Specifically, in the present embodiment, sensor P2 is hidden by light shield layer, to such an extent as to be blocked from extraneous next light, causes sensor P2 to be difficult to receive light, and wherein light shield layer for example is black matrix (black matrix) or metal level.Therefore, generally speaking, illusory light sensing bar 130 does not provide the function of light sensing basically.
These light sensing bars 110 can be situated in illusory light sensing bar 130 sides.When light sensing array panel 100 is the assembly of display, these light sensing bars 110 and sweep trace 120 all the position in the viewing area, and illusory light sensing bar 130 and illusory sweep trace 140 all the position in non-display area, so the shown image of display can not appear at the position of illusory light sensing bar 130.
Figure 1B is the time dependent synoptic diagram of voltage signal that inputs to sweep trace and illusory sweep trace among Figure 1A.See also Figure 1A and Figure 1B, in the driving method of present embodiment, see through these sweep traces 120, open these light sensing bars 110 in regular turn, the step of wherein opening these light sensing bars 110 in regular turn comprises: import a voltage signal D 1 in regular turn to these sweep traces 120, wherein voltage signal D1 is exported by power supply V1.
In the embodiment shown in Figure 1A, can be earlier open from the light sensing bar 110 of below.Then, open the contiguous light sensing bar 110 in top.The rest may be inferred, opens light sensing bar 110 in regular turn from the bottom up one by one, is unlocked up to the light sensing bar 110 of the most approaching illusory light sensing bar 130.So the opening sequence of the light sensing bar 110 among Figure 1A can be from lower to upper.
According to the opening sequence of above-mentioned light sensing bar 110, the voltage signal D1 of the top inputs among Figure 1A the sweep trace 120 of below among Figure 1B, and the voltage signal D1 of below is the sweep trace 120 that inputs to the most approaching illusory light sensing bar 130 among Figure 1A.These voltage signals D1 as for the centre inputs to other sweep trace 120 respectively.
Voltage signal D1 has pulse (pulse) A1.When sweep trace 120 received pulse A1, sweep trace 120 can be opened the light sensing bar 110 that it electrically connected.These light sensing bars 110 open in regular turn during T1, the sweep trace 120 of below can receive pulse A1 earlier.Afterwards, pulse A1 inputs to these sweep traces 120 from the bottom up one by one, receives pulse A1 up to the sweep trace 120 of the most approaching illusory light sensing bar 130.
In addition, these light sensing bars 110 open in regular turn during T1, lasting unlatching is a light sensing bar 110 wherein.When another light sensing bar 110 will be opened by the time, the light sensing bar of having opened 110 can stop to open.Therefore, the times that wantonly two light sensing bars 110 continue to open can't overlap, thus the pulse A1 of each voltage signal D1 can't overlap in time, shown in Figure 1B.
These light sensing bars 110 open in regular turn during T1, lasting unlatching is a light sensing bar 110 wherein, opens up to another illusory light sensing bar 130.Specifically, when the light sensing bar 110 that takes turns to the most approaching illusory light sensing bar 130 is unlocked, can continue to open this light sensing bar 110.When illusory by the time light sensing bar 130 will be opened, the light sensing bar of having opened 110 can stop to open.
During in the T1, can not open illusory light sensing bar 130, and during T1 through after, see through illusory sweep trace 140, open illusory light sensing bar 130, promptly illusory light sensing bar 130 be during time beyond the T1 open.Hence one can see that, and when these light sensing bars 110 were not all opened, illusory light sensing bar 130 just can be unlocked, and the step of wherein opening illusory light sensing bar 130 comprises that input one voltage signal D2 is to illusory sweep trace 140.Voltage signal D2 is exported by power supply V1, and has pulse A2.
T2 during illusory light sensing bar 130 unlatchings, illusory sweep trace 140 meeting received pulse A2 are to open illusory light sensing bar 130.The time of T2 during the burst length of pulse A2 is substantially equal to, therefore during in the T2, can continue to open illusory light sensing bar 130, open up to arbitrary light sensing bar 110.Afterwards, open these light sensing bars 110 once more in regular turn.
Hence one can see that, and when all light sensing bars 110 stopped to open, illusory light sensing bar 130 just can be opened; When illusory light sensing bar 130 stopped to open, these light sensing bars 110 just can be opened in regular turn.In addition, when 100 runnings of light sensing array panel, these light sensing bars 110 and illusory light sensing bar 130 can be separately, interruptedly open in turn and not, and voltage signal D1, D2 can be alternately and interruptedly do not inputed to these sweep traces 120 and illusory sweep trace 140.
What deserves to be mentioned is, when light sensing array panel 100 is applied to display (for example LCD), and when being used for controlling a kind of active assembly array substrate of picture element, these light sensing bars 110 open in regular turn during T1 can be a picture cycle (frame period), and T2 can be a blank time (blank time) between adjacent two picture cycles during illusory light sensing bar 130 was opened.
Fig. 1 C is the time dependent synoptic diagram of sensing signal that the light sensing array panel is exported among Figure 1A.See also Figure 1A and Fig. 1 C, light sensing array panel 100 can also comprise many read lines 150, and these read lines 150 are staggered with these sweep traces 120, and electrically connects these light sensing bars 110 and illusory light sensing bar 130.
Each bar read line 150 can output one sensing signal D3, is sensing signal D3 that read line 150 is exported wherein and Fig. 1 C illustrates.According to the sensing signal D3 that these read lines 150 are exported, can judge from extraneous next irradiate light on that light sensing unit 112; Or, judge that light is interdicted on that light sensing unit 112, can be to send wherein from light pen from extraneous next light.
For example, when light sensing array panel 100 is shone by the light in the external world, a wave crest W1 can appear on the sensing signal D3.Time that occurs according to wave crest W1, and utilize frequency (clock), can learn that light sensing unit 112 on the read line 150 is by irradiate light.So, according to the sensing signal D3 that each bar read line 150 is exported, can learn that extraneous light is radiated on that position of light sensing array panel 100.
Hence one can see that, the user can utilize the light that light source sent such as light pen, or contact light sensing array panel 100 with finger or article such as pointer, control light sensing array panel 100, so that light sensing array panel 100 can input instructions to electronic installation (for example mobile phone, computing machine or personal digital aid (PDA)), and then operating electronic devices.
In addition, because these light sensing bars 110 and separately, the in turn and not unlatching interruptedly of illusory light sensing bar 130, so when 100 runnings of light sensing array panel, these read lines 150 can be exported sensing signal D3 sustainedly and stably, so that the magnitude of voltage of sensing signal D3 can maintain more than the certain value C in fact.In addition, at illusory light sensing bar 130 open period T2, because illusory light sensing bar 130 can not light sensing, so the magnitude of voltage of sensing signal D3 is essentially definite value C, shown in Fig. 1 C.
Fig. 2 A is the circuit diagram of the applied light sensing array panel of the driving method of another embodiment of the present invention.See also Fig. 2 A, the driving method of present embodiment is applied to a light sensing array panel 200, wherein light sensing array panel 200 is identical substantially with light sensing array panel 100 the two circuit structure of previous embodiment, only difference only is: the two quantity of the included illusory light sensing bar 130 of light sensing array panel 200 and illusory sweep trace 140 is all a plurality of, and these light sensing bars 110 are can the position other at these illusory light sensing bars 130.
Fig. 2 B is the time dependent synoptic diagram of voltage that inputs to sweep trace and illusory sweep trace among Fig. 2 A.See also Fig. 2 A and Fig. 2 B, the driving method of present embodiment is similar to the driving method of previous embodiment, for example light sensing array panel 200 also comprises many light sensing bars 110 and multi-strip scanning line 120, and these sweep traces 120 these light sensing bars 110 of electric connection, wherein these light sensing bars 110 are opened in regular turn through these sweep traces 120.Therefore in addition, the mode that these light sensing bars 110 are opened in regular turn is identical with previous embodiment, no longer repeats to give unnecessary details below.
But, still have difference between the driving method of present embodiment and the driving method of previous embodiment, it is: the opening ways of these illusory light sensing bars 130.Specifically, when these light sensing bars 110 are not all opened, see through these illusory sweep traces 140, open these illusory light sensing bars 130 in regular turn.When opening these illusory light sensing bars 130 in regular turn, import a voltage signal D4 in regular turn to these illusory sweep traces 140, wherein voltage signal D4 is exported by the power supply V1 that connects illusory light sensing unit 132.
In the embodiment shown in Fig. 2 A, the two quantity of illusory light sensing bar 130 and illusory sweep trace 140 is all two, and during in the T2, can open the illusory light sensing bar 130 of below earlier.Afterwards, open another illusory light sensing bar 130.According to the opening sequence of above-mentioned illusory light sensing bar 130, the voltage signal D4 of top is the illusory sweep trace 140 that inputs among Fig. 2 A the below among Fig. 2 B, and the voltage signal D4 of below is the illusory sweep trace 140 that inputs to top among Fig. 2 A.
Specifically, these illusory light sensing bars 130 open in regular turn during T2, the illusory sweep trace 140 of below can receive the pulse A3 of voltage signal D4 earlier.Afterwards, the illusory sweep trace 140 of top just can receive pulse A3.So, the illusory sweep trace 140 of below can be unlocked earlier, and the illusory sweep trace 140 of top can be unlocked at last.
These illusory light sensing bars 130 open in regular turn during T2, can continue to open wherein illusory light sensing bar 130.When another illusory light sensing bar 130 will be opened by the time, the illusory light sensing bar of having opened 130 can stop to open.Therefore, the time that these illusory light sensing bars 130 continue to open can't overlap, so the pulse A3 of each voltage signal D4 can't overlap in time.
During T2 through after, all illusory light sensing bars 130 stop to open, and these light sensing bars 110 see through sweep trace 120 and open in regular turn, up to through T2 during next time, open these illusory light sensing bars 130 once more in regular turn.Hence one can see that, these light sensing bars 110 and separately, the in turn and not unlatching interruptedly of these illusory light sensing bars 130.
Light sensing array panel 200 can also comprise many read lines 150, and these read lines 150 electrically connect these light sensing bars 110 and these illusory light sensing bars 130.Because light sensing bar 110 and separately, the in turn and not unlatching interruptedly of illusory light sensing bar 130, so when 200 runnings of light sensing array panel, read line 150 also can be exported sensing signal sustainedly and stably, so that the magnitude of voltage of sensing signal maintains certain value above (shown in Fig. 1 C) in fact.
In sum, by illusory sweep trace and illusory light sensing bar, when all light sensing bars are not all opened, see through illusory sweep trace and open illusory light sensing bar, therefore the driving method of light sensing array panel of the present invention not only utilizes sweep trace and light sensing bar, but also utilizes illusory sweep trace and illusory light sensing bar.
Secondly, when the light sensing array panel operates, because separately, the in turn and not unlatching interruptedly of light sensing bar and illusory light sensing bar, so read line can be exported sensing signal sustainedly and stably.Therefore, when handling sensing signal, can carry out simple filtering earlier, for example allow sensing signal pass through electric capacity, with the noise of filtering direct current composition.So, can not only improve the sensing accuracy of light sensing array panel, also simplify the work of subsequent treatment sensing signal simultaneously.
Though the present invention with previous embodiment openly as above, so it is not in order to limiting the present invention, anyly has the knack of alike skill person, and without departing from the spirit and scope of the present invention, institute does to change and the equivalence replacement of retouching, and still is in the scope of patent protection of the present invention.
Claims (8)
1. the driving method of a light sensing array panel, it is characterized in that, be applied to a light sensing array panel, this light sensing array panel comprises many light sensing bars, multi-strip scanning line, at least one illusory light sensing bar and at least one illusory sweep trace, those light sensing bars are arranged side by side each other, and the position by this illusory light sensing bar, those sweep traces electrically connect those light sensing bars, and this illusory sweep trace electrically connects this illusory light sensing bar, and this driving method comprises the following steps:
See through those sweep traces, open those light sensing bars in regular turn; And
When those light sensing bars are not all opened, see through this illusory sweep trace, open this illusory light sensing bar.
2. the driving method of light sensing array panel as claimed in claim 1 is characterized in that, the step of opening those light sensing bars in regular turn comprises imports a voltage signal in regular turn to those sweep traces.
3. the driving method of light sensing array panel as claimed in claim 1 is characterized in that, the step of opening this illusory light sensing bar comprises that input one voltage signal is to this illusory sweep trace.
4. the driving method of light sensing array panel as claimed in claim 1 is characterized in that, those light sensing bars open in regular turn during, lasting unlatching is a light sensing bar wherein, opens up to another illusory light sensing bar.
5. the driving method of light sensing array panel as claimed in claim 1 is characterized in that, during this illusory light sensing bar unlatching, continues to open this illusory light sensing bar, opens up to arbitrary light sensing bar.
6. the driving method of light sensing array panel as claimed in claim 1, it is characterized in that the two quantity of this illusory light sensing bar and this illusory sweep trace is all a plurality of, when those light sensing bars are not all opened, see through those illusory sweep traces, open those illusory light sensing bars in regular turn.
7. the driving method of light sensing array panel as claimed in claim 6 is characterized in that, those illusory light sensing bars open in regular turn during, lasting unlatching is an illusory light sensing bar wherein, opens up to another illusory light sensing bar.
8. the driving method of light sensing array panel as claimed in claim 1, it is characterized in that, this light sensing array panel also comprises many read lines, those read lines and those sweep traces are staggered, and electrically connect those light sensing bars and this illusory light sensing bar, respectively this read line is exported a sensing signal, and at this illusory light sensing bar open period, the magnitude of voltage of this sensing signal is essentially certain value.
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| CN2010105227615A CN101976159B (en) | 2010-10-20 | 2010-10-20 | Method for driving optical sensing array panel |
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| JPH01276887A (en) * | 1988-04-27 | 1989-11-07 | Fuji Xerox Co Ltd | Picture reader |
| CN1782837A (en) * | 2004-12-03 | 2006-06-07 | 三星电子株式会社 | Touch sensible display device |
| CN101131808A (en) * | 2007-10-15 | 2008-02-27 | 友达光电股份有限公司 | Liquid crystal display device and its driving method |
| CN101345029A (en) * | 2007-07-11 | 2009-01-14 | 奇美电子股份有限公司 | Crystal display device with void signal wire and driving method thereof |
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2010
- 2010-10-20 CN CN2010105227615A patent/CN101976159B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01276887A (en) * | 1988-04-27 | 1989-11-07 | Fuji Xerox Co Ltd | Picture reader |
| CN1782837A (en) * | 2004-12-03 | 2006-06-07 | 三星电子株式会社 | Touch sensible display device |
| CN101345029A (en) * | 2007-07-11 | 2009-01-14 | 奇美电子股份有限公司 | Crystal display device with void signal wire and driving method thereof |
| CN101131808A (en) * | 2007-10-15 | 2008-02-27 | 友达光电股份有限公司 | Liquid crystal display device and its driving method |
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| CN101976159B (en) | 2012-07-25 |
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