CN101349957A - Display apparatus and data reading controller thereof - Google Patents
Display apparatus and data reading controller thereof Download PDFInfo
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- CN101349957A CN101349957A CNA2008101340946A CN200810134094A CN101349957A CN 101349957 A CN101349957 A CN 101349957A CN A2008101340946 A CNA2008101340946 A CN A2008101340946A CN 200810134094 A CN200810134094 A CN 200810134094A CN 101349957 A CN101349957 A CN 101349957A
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Abstract
A display device and a data read controller thereof are disclosed, wherein the display device comprises a touch control display module, a first data read controller and a second data read controller, the first data read controller and the second data read controller respectively comprise a first read switch, a second read switch, a first sampling unit and a second sampling unit, the first data read controller and the second data read controller can read the multiplexing output of the first sampling unit, the first read switch, the second sampling unit and the second read switch, to effectively reduce the number of data output contacts and reduce power loss. The invention can reduce the contact number of data signal transmission to reduce cost and power loss, and reduce the error of signal induction.
Description
Technical field
The present invention relates to a kind of display device and data reading controller thereof, relate in particular to a kind of data reading controller that has the display device of touch control screen and be used to read the sensing signal of this touch control screen.
Background technology
In recent years, the development of flat display apparatus is more and more rapider, and it replaces traditional CRT display (Cathode Ray Tube Display gradually; CRT display).Flat display apparatus now mainly contains following several: organic light emitting diode display device (Organic Light-EmittingDiodes Display; OLED), plasm display device (Plasma Display Panel; PDP), liquid crystal indicator (Liquid Crystal Display; LCD) and field emission display device (FieldEmission Display; FED) etc.Power saving, the no width of cloth are penetrated, volume is little because liquid crystal indicator possesses, low power consumption, do not take up space, advantage such as flat square, high-res and image quality are stablized, it has been widely used on the electronic products such as mobile phone, screen, digital television, notebook computer, as the usefulness of demonstration.
On the other hand, in order to increase the operational convenience of electronic product that these use liquid crystal indicator, electronic product on the market also can be according to the demand in the practical application at present, on liquid crystal indicator, increase the function of touching control (touch control), so as to the input of reading the user to carry out the control of electronic product.In general, this kind liquid crystal indicator promptly is called touch control type LCD device.
In touch control type LCD device, touch-control type display module can be exported a plurality of sensing signals to data reading controller according to user's touching, and then respectively in man-to-man mode, outputting data signals is to the touch-control control chip again for data reading controller.In more detail, in touch control type LCD device, according to user's touching whether each pixel all can export corresponding sensing signal respectively to data reading controller on its display panel, data reading controller again in response to the sensing signal outputting data signals to the touch-control control chip.
As shown in Figure 1, existing touch control type LCD device 1 comprise display panel 11, sweep signal generator 13, a plurality of data reading controller 151,152,153 ..., 15n and touch-control control chip 17.Comprise on the display panel 11 m capable (131,132,133 ..., 13m) * n row (111,112,113 ..., 11n) individual pixel, just display panel 11 comprises m * n pixel.A plurality of pixels of each row will be electrically connected to a data Read Controller simultaneously, and for example a plurality of pixels of first row 111 of display panel 11 will be electrically connected to data reading controller 151 simultaneously; A plurality of pixels of the secondary series 112 of display panel 11 will be electrically connected to data reading controller 152 simultaneously; By that analogy, last, a plurality of pixels of the n row 11n of display panel 11 will be electrically connected to data reading controller 15n simultaneously.These data reading controllers 151,152,153 ..., 15n is electrically connected to touch-control control chip 17 respectively.The sensing signal 121 of a plurality of pixels of each row in the display panel 11,122,123, ..., a plurality of sweep signals 101 that 12n will be produced according to sweep signal generator 13,102,103, ..., the sequential of 10m exports data reading controller 151 respectively in regular turn to, 152,153, ..., 15n, these sensing signals 121,122,123, ..., 12n is respectively by data reading controller 151,152,153, ..., after 15n reads, to produce data 141,142,143, ..., 14n, these data 141,142,143, ..., 14n will be output to touch-control control chip 17 in man-to-man mode and carry out follow-up signal Processing.
In more detail, data reading controller 151,152,153 ..., 15n is electrically connected to touch-control control chip 17 with an output contact respectively.When the display panel 11 of touch control type LCD device 1 comprises 50 row * 100 row pixel, promptly need 100 data Read Controllers to read sensing signal, and need 100 output contact output datas to touch-control control chip 17.If when the display panel 11 of touch control type LCD device 1 comprises 500 row * 1000 row pixels, then need the more data Read Controller to read sensing signal, need more output contact (promptly 1000) output data simultaneously to touch-control control chip 17.This measure will cause the problems such as manufacturing cost increase, circuit complexity raising and power attenuation increase of touch control type LCD device 1.
In order to reduce manufacturing cost, circuit complexity and power attenuation, touch control type LCD device manufacturer has adopted the time-sharing multiplex mode to read sensing signal and output data, in the hope of reducing the quantity of data reading controller and output contact.Yet, if directly adopt the time-sharing multiplex mode to read sensing signal and output data, the sensing signal that each data reading controller read will have the different duration of charging, so will cause the error that reads of sensing signal, make the data that export the touch-control control chip to incorrect, and then cause touch control type LCD device erroneous judgement user's input.
In sum, though use the time-sharing multiplex mode can significantly reduce the quantity of the data reading controller and the output contact of touch control type LCD device, the problem that thereby workout cost increases, circuit complexity improves and power attenuation increases, but the convenience of having sacrificed the user simultaneously.In view of this, the quantity that how to reduce data reading controller and output contact is improved the problem of the error of sensing signal simultaneously, has become the important topic that industry needs to be resolved hurrily.
Summary of the invention
A purpose of the present invention is to provide a kind of data reading controller, and this data reading controller is applicable to display device.By the sampling unit and the read switch of this data reading controller, can effectively solve the problem of sampling duration of charging deficiency.
To achieve these goals, the invention provides a kind of data reading controller, this kind data reading controller comprises first read switch, second read switch, first sampling unit and second sampling unit.Aforementioned first sampling unit receives sensing signal, and produces first data according to this sensing signal; Aforementioned second sampling unit receives this sensing signal, and produces second data according to this sensing signal.When second sampling unit produced second data according to sensing signal, first read switch received and exports first data; When first sampling unit produced first data according to sensing signal, second read switch then received and exports second data.Utilize data reading controller provided by the present invention, can solve the problem of sampling duration of charging deficiency effectively.
Another object of the present invention is to provide a kind of display device with touch-control type display module.By this display device, a plurality of sensing signals from touch-control type display module output can exports via single contact, reduce the demand of the contact of outputting data signals in a large number, and then realization reduces cost and problem such as power consumption.
In order to realize above-mentioned purpose, the invention provides a kind of display device, this kind display device comprises touch-control type display module, first data reading controller and second data reading controller.Aforementioned touch-control display module is in order to export a plurality of sensing signals, and these sensing signals then comprise first sensing signal and second sensing signal.Aforementioned first data reading controller is electrically connected to touch-control type display module, in order to receiving first sensing signal, and produces first data and second data according to first sensing signal.Aforementioned second data reading controller is electrically connected to this touch-control type display module equally, in order to receiving this second sensing signal, and produces the 3rd data and the 4th data according to this second sensing signal.
According to embodiments of the invention, when this first data reading controller and this second data reading controller produce these second data and the 4th data simultaneously according to this first sensing signal and this second sensing signal respectively, this first data reading controller is to read signal according to first to export this first data, and this second data reading controller is that the 3rd data are exported in the number of winning the confidence according to third reading; When this first data reading controller and this second data reading controller produce these first data and the 3rd data simultaneously according to this first sensing signal and this second sensing signal respectively, this first data reading controller is that this second data are exported in the number of winning the confidence according to second reading, and this second data reading controller is to read signal according to the 4th to export the 4th data.
Utilize described display device of leading portion and data reading controller thereof, the a plurality of sensing signals that touch-control type display module can be exported are exported via single contact, a large amount of demands that reduce the contact of output sensing signal, and then reduce cost and power consumption, also can improve the error of sensing signal simultaneously.
Behind the embodiment of consulting accompanying drawing and describing subsequently, those of ordinary skills can understand other purpose of the present invention, advantage and technological means of the present invention and form of implementation.
Description of drawings
Fig. 1 is the synoptic diagram of existing touch control type LCD device;
Fig. 2 is the synoptic diagram of preferred embodiment of the present invention;
Fig. 3 is the circuit diagram of the preferred embodiment of data reading controller;
Fig. 4 is the waveform sequential chart of preferred embodiment of the present invention;
Fig. 5 is another circuit diagram of the preferred embodiment of data reading controller of the present invention;
Fig. 6 A is another circuit diagram of the preferred embodiment of data reading controller of the present invention;
Fig. 6 B is another circuit diagram of the preferred embodiment of data reading controller of the present invention;
Fig. 6 C is another circuit diagram of the preferred embodiment of data reading controller of the present invention; And
Fig. 7 is another waveform sequential chart of preferred embodiment of the present invention.
Wherein, description of reference numerals is as follows:
1: touch control type LCD device
11: display panel
13: the sweep signal generator
17: the touch-control control chip
101,102 ..., 10m: sweep signal
111,112 ..., 11n: the row pixel
121,122 ..., 12n: sensing signal
131,132 ..., 13m: the row pixel
141,142 ..., 14n: data
151,152 ..., 15n: data reading controller
2: display device
21: touch-control type display module
23: the sweep signal generator
27: the touch-control control chip
201,202 ..., 20m: sweep signal
211,212 ..., 21n: the row pixel
221,222 ..., 22n: sensing signal
231,232 ..., 23m: the row pixel
251,252 ..., 25n: data reading controller
30: the first sampled signals
31: the second sampled signals
301: the first contacts
302: the first data
303: the second contacts
Read signal at 304: the first
305: the first change-over switches
307: the first electric capacity
311: the three contacts
312: the second data
313: the four contacts
314: the second reading number of winning the confidence
315: the second change-over switches
317: the second electric capacity
321: the five contacts
322: the three data
323: the six contacts
324: the third reading number of winning the confidence
325: the three change-over switches
327: the three electric capacity
331: the seven contacts
332: the four data
333: the eight contacts
Read signal in 334: the four
335: the four change-over switches
337: the four electric capacity
341: the nine contacts
342: the five data
343: the ten contacts
Read signal in 344: the five
345: the five change-over switches
347: the five electric capacity
351: the 11 contacts
352: the six data
353: the ten two points
Read signal in 354: the six
355: the six change-over switches
357: the six electric capacity
3A: first sampling unit
3B: first read switch
3C: second sampling unit
3D: second read switch
3E: the 3rd sampling unit
3F: third reading takes away the pass
3G: the 4th sampling unit
3H: the 4th read switch
3I: the 5th sampling unit
3J: the 5th read switch
3K: the 6th sampling unit
3L: the 6th read switch
The waveform interval of 40: the first sampled signals
The waveform interval of 41: the second sampled signals
Read the waveform interval of signal at 42: the first
43: the waveform interval of the third reading number of winning the confidence
Read the waveform interval of signal in 44: the five
45: the waveform interval of the second reading number of winning the confidence
Read the waveform interval of signal in 46: the four
Read the waveform interval of signal in 47: the six
50: the first unity gain buffers
51: the second unity gain buffers
52: the three unity gain buffers
53: the four unity gain buffers
54: the five unity gain buffers
55: the six unity gain buffers
60: the first reset signals
61: the reset voltage contact
62: the second reset signals
601: the first reset switch
611: the second reset switch
621: the three replacement switches
Quadruple was put switch in 631: the
641: the five reset switch
Sixfold was put switch in 651: the
The waveform interval of 70: the first reset signals
The waveform interval of 72: the second reset signals
Embodiment
Below will explain content of the present invention by embodiment, it is about a kind of display device and data reading controller thereof.By sampling unit and read switch, the sensing signal that this data reading controller read will have the identical duration of charging, in view of the above, can solve the different problem of duration of charging of sensing signal effectively.Simultaneously, from data reading controller produce a plurality of data will reduce the demand of output contact in a large number via single contact output, and then realize reducing problems such as manufacturing cost and power consumption.
Yet embodiments of the invention are not to implement any particular environment of the present invention, application or particular form in order to restriction.Therefore, only be explaination purpose of the present invention about the explanation of embodiment, but not in order to restriction the present invention.Need the expositor, in following examples and the accompanying drawing, all omitted with the non-directly related element of the present invention and not shown; And for the purpose of asking simple and easy understanding, each interelement size relationship is not to illustrate according to actual ratio.
Fig. 2 illustrates a kind of display device according to preferred embodiment of the present invention.Display device 2 comprise touch-control type display module 21, sweep signal generator 23, a plurality of data reading controller 251,252,253 ..., 25n and touch-control control chip 27.Comprise on the touch-control type display module 21 m capable (231,232,233 ..., 23m) * n row (211,212,213 ..., 21n) individual pixel, just touch-control type display module 21 comprises m * n pixel.A plurality of pixels of each row will be electrically connected to a data Read Controller simultaneously, and for example a plurality of pixels of first row 211 of touch-control type display module 21 will be electrically connected to data reading controller 251 simultaneously; A plurality of pixels of the secondary series 212 of touch-control type display module 21 will be electrically connected to data reading controller 252 simultaneously; By that analogy, a plurality of pixels of the n row 21n of touch-control type display module 21 will be electrically connected to data reading controller 25n simultaneously.These data reading controllers 251,252,253 ..., 25n will be electrically connected to touch-control control chip 27 in ternary mode.The sensing signal 221 of a plurality of pixels of each row in the touch-control type display module 21,222,223, ..., a plurality of sweep signals 201 that 22n will be produced according to sweep signal generator 23,202,203, ..., the sequential of 20m exports data reading controller 251 respectively in regular turn to, 252,253, ..., 25n, these sensing signals 221,222,223, ..., 22n is respectively by data reading controller 251,252,253, ..., after 25n reads, to produce data (scheming not shown), these data then will be output respectively in the mode of time-sharing multiplex to touch-control control chip 27 carries out follow-up signal Processing.
With preferred embodiment, data reading controller 251,252,253 ..., 25n is electrically connected to touch-control control chip 27 in ternary mode with an output contact.For example, data reading controller 251,252,253 is electrically connected to touch-control control chip 27 with an output contact; Data reading controller 25n-2,25n-1,25n are electrically connected to touch-control control chip 27 with an output contact.In view of the above, three data Read Controllers can a shared output contact export data to touch-control control chip 27 in the mode of time-sharing multiplex.
Though display device 2 illustrated in fig. 2 is electrically connected to touch-control control chip 27 with three data Read Controllers with an output contact, the present invention does not limit the quantity of the data reading controller of an output contact connection; In other words, pass through above stated specification, those of ordinary skills with this technical field can be electrically connected to touch-control control chip 27 with an output contact with the data reading controller more than four, not limiting only has three data Read Controllers can use an output contact, so do not repeat them here.
Below will the operation that the data reading controller of the preferred embodiment of display device of the present invention reads sensing signal be described with different forms of implementation.Fig. 3 is the circuit diagram of data reading controller 251,252,253.For convenience of description, censure data reading controller 251,252,253 respectively with first data reading controller 251, second data reading controller 252 and the 3rd data reading controller 253; Similarly, also censure sensing signal 221,222,223 respectively with first sensing signal 221, second sensing signal 222 and the 3rd sensing signal 223.First data reading controller 251 comprises the first sampling unit 3A, the first read switch 3B, the second sampling unit 3C and the second read switch 3D; 252 of second data reading controllers comprise the 3rd sampling unit 3E, third reading takes away and closes 3F, the 4th sampling unit 3G and the 4th read switch 3H; And the 3rd data reading controller 253 comprises the 5th sampling unit 3I, the 5th read switch 3J, the 6th sampling unit 3K and the 6th read switch 3L.
The first sampling unit 3A of first data reading controller 251 has first contact 301, second contact 303, first change-over switch 305 and first electric capacity 307.First change-over switch 305 is to be electrically connected to first contact 301 and second contact 303.307 of first electric capacity have first end and second end (scheming not shown), and its first end is electrically connected to second contact 303.Its second sampling unit 3C then has the 3rd contact 311, one the 4th contact 313, second change-over switch 315 and second electric capacity 317.Second change-over switch 315 is to be electrically connected to the 3rd contact 311 and the 4th contact 313.317 of second electric capacity have first end and second end (scheming not shown), and its first end then is electrically connected to the 4th contact 313.
In first data reading controller 251, first change-over switch 305 is whether to control its conductings by first sampled signal 30; Whether the first read switch 3B reads signal 304 its conductings of control by first; Second change-over switch 315 is whether to control its conductings by second sampled signal 31; And whether the second read switch 3D controls its conductings by the second reading number of winning the confidence 314.
The 3rd sampling unit 3E of second data reading controller 252 has the 5th contact 321, the 6th contact 323, the 3rd change-over switch 325 and the 3rd electric capacity 327.The 3rd change-over switch 325 is to be electrically connected to the 5th contact 321 and the 6th contact 323.327 of the 3rd electric capacity have first end and second end (scheming not shown), and its first end is electrically connected to the 6th contact 333.Its 4th sampling unit 3G then has the 7th contact 331, the 8th contact 333, the 4th change-over switch 335 and the 4th electric capacity 337.The 4th change-over switch 335 is to be electrically connected to the 7th contact 331 and the 8th contact 333.337 of the 4th electric capacity have first end and second end (scheming not shown), and its first end then is electrically connected to the 8th contact 333.
In second data reading controller 252, whether the 3rd change-over switch 325 controls its conductings by first sampled signal 30 equally; Third reading takes away pass 3F and whether controls its conductings by the third reading number of winning the confidence 324; Whether the 4th change-over switch 335 controls its conductings by second sampled signal 31 too; And whether the 4th read switch 3H reads signal 334 its conductings of control by the 4th.
The 5th sampling unit 3I of the 3rd data reading controller 253 has the 9th contact 341, the tenth contact 343, the 5th change-over switch 345 and the 5th electric capacity 347.The 5th change-over switch 345 is to be electrically connected to the 9th contact 341 and the tenth contact 343.347 of the 5th electric capacity have first end and second end (scheming not shown), and its first end is electrically connected to the tenth contact 343.Its 6th sampling unit 3K then has the 11 contact 351,1 the tenth two point 353, the 6th change-over switch 355 and the 6th electric capacity 357.The 6th change-over switch 355 is to be electrically connected to the 11 contact 351 and the tenth two point 353.357 of the 6th electric capacity have first end and second end (scheming not shown), and its first end then is electrically connected to the tenth two point 353.
In the 3rd data reading controller 253, whether the 5th change-over switch 345 controls its conductings by first sampled signal 30 equally; Whether the 5th read switch 3J reads signal 344 its conductings of control by the 5th; Whether the 6th change-over switch 355 controls its conductings by second sampled signal 31 too; And whether the 6th read switch 3L reads signal 354 its conductings of control by the 6th.
Fig. 4 is that first sampled signal 30, second sampled signal 31, first read signal 304, the second reading number of winning the confidence 314, the third reading number of winning the confidence the 324, the 4th and read signal the 334, the 5th and read the waveform sequential chart that signal 344 and the 6th reads signal 354.When first sampled signal 30 makes the 5th change-over switch 345 conductings of the 3rd change-over switch 325 of first change-over switch 305, the 3rd sampling unit 3E of the first sampling unit 3A and the 5th sampling unit 3I simultaneously (waveform interval 40), first sensing signal 221 will charge and produce first data 302 first electric capacity 307; Second sensing signal 222 will charge and produce the 3rd data 322 the 3rd electric capacity 327; And the 3rd sensing signal 223 will charge and produce the 5th data 342 the 5th electric capacity 347.
Then, when second sampled signal 31 makes the 6th change-over switch 355 conductings of the 4th change-over switch 335 of second change-over switch 315, the 4th sampling unit 3G of the second sampling unit 3C and the 6th sampling unit 3K simultaneously (waveform interval 41), first sensing signal 221 will charge and produce second data 312 second electric capacity 317; Second sensing signal 222 will charge and produce one the 4th data 332 the 4th electric capacity 337; And the 3rd sensing signal 223 will charge and produce the 6th data 352 the 6th electric capacity 357.
When second electric capacity 317, the 4th electric capacity 337 and the 6th electric capacity 357 charge, first reads signal 304, the third reading number of winning the confidence 324 and the 5th reads signal 344 and conducting in regular turn (being waveform interval 42,43,44) the first read switch 3B, third reading are taken away closes 3F and the 5th read switch 3J, makes win data 302, the 3rd data 322 and the 5th data 342 export touch-control control chip 27 to by second contact 303, the 6th contact 323 and the tenth contact 343 in regular turn.
When first sampled signal 30 makes first change-over switch 305 of the first sampling unit 3A, the 3rd change-over switch 325 of the 3rd sampling unit 3E and the 5th change-over switch 345 conductings of the 5th sampling unit 3I once again simultaneously, when producing first data 302, the 3rd data 322 and the 5th data 342 respectively.At the same time, the second reading number of winning the confidence the 314, the 4th is read signal 334 and the 6th and is read signal 354 with conducting in regular turn (being waveform interval 45,46,47) the second read switch 3D, the 4th read switch 3H and the 6th read switch 3L, makes second data 312, the 4th data 332 and the 6th data 352 export touch-control control chip 27 to by the 4th contact 313, the 8th contact 333 and the tenth two point 353 in regular turn.
In sum, after first data reading controller 251, second data reading controller 252 and the 3rd data reading controller 253 utilize first change-over switch 305, the 3rd change-over switch 325 and the 5th change-over switch 345 to produce first data 302, the 3rd data 322 and the 5th data 342 in identical duration of charging respectively, the second read switch 3D, the 4th read switch 3H and the 6th read switch 3L make second data 312, the 4th data 332 and the 6th data 352 export touch-control control chip 27 in regular turn to conducting in regular turn; Similarly, after first data reading controller 251, second data reading controller 252 and the 3rd data reading controller 253 utilize second change-over switch 315, the 4th change-over switch 335 and the 6th change-over switch 355 to produce second data 312, the 4th data 332 and the 6th data 352 in identical duration of charging respectively, the first read switch 3B, third reading take away closes 3F and the 5th read switch 3J with conducting in regular turn, makes win data 302, the 3rd data 322 and the 5th data 342 export touch-control control chip 27 in regular turn to.
Therefore, the reading of data that first data reading controller 251, second data reading controller 252 and the 3rd data reading controller 253 can use the mode of time-sharing multiplex to export to have the identical duration of charging is to touch-control control chip 27, thereby can reduce the error of sensing signal 221,222,223, and then make display device 2 can not judge user's input by accident.
Fig. 5 is another form of implementation of data reading controller 251,252,253, its first data reading controller 251 is except comprising the element that goes out as shown in Figure 3, and other comprises first unity gain buffer (unit gain buffer), 50 and second unity gain buffer 51; Second data reading controller 252 is except comprising the element that goes out as shown in Figure 3, and other comprises the 3rd unity gain buffer 52 and the 4th unity gain buffer 53; And the 3rd data reading controller 253 also comprises the 5th unity gain buffer 54 and the 6th unity gain buffer 55 equally except comprising the element that goes out as shown in Figure 3.
First unity gain buffer 50 of first data reading controller 251 can effectively keep the voltage of first data 302; Its second unity gain buffer 51 then can effectively keep the voltage of second data 312.By the sustaining voltage mode, first data 302 and second data 312 that export touch-control control chip 27 to will be more stable.
Similarly, the 3rd unity gain buffer 52 of second data reading controller 252 can effectively keep the voltage of the 3rd data 322; Its 4th unity gain buffer 53 then can effectively keep the voltage of the 4th data 332.In view of the above, exporting the 3rd data 322 and the 4th data 332 of touch-control control chip 27 to will be more stable.
By that analogy, the 5th unity gain buffer 54 of the 3rd data reading controller 253 can effectively keep the voltage of the 5th data 342; Its 6th unity gain buffer 55 then can effectively keep the voltage of the 6th data 352.To make that equally the 5th data 342 and the 6th data 352 that export touch-control control chip 27 to will be more stable.
Fig. 5 also can carry out as 251,252,253 the operation described and the functions of the data reading controller shown in Fig. 3 for other element of data reading controller 251,252,253, have the technical field of the invention know usually the knowledgeable can be directly acquainted with the data reading controller 251,252,253 shown in Fig. 5 how based on the data reading controller shown in Fig. 3 251,252,253 to carry out same operation and function, so do not repeat them here.
Fig. 6 A, Fig. 6 B and Fig. 6 C show another form of implementation of data reading controller 251,252,253 respectively.First data reading controller 251 shown in Fig. 6 A is except comprising the element that goes out as shown in Figure 3, and other comprises a reset voltage contact 61, and its first sampling unit 3A then comprises first reset switch 601 in addition; The second sampling unit 3C then comprises second reset switch 611.Second end of first electric capacity 307 of the first sampling unit 3A (scheming not shown) is electrically connected to reset voltage contact 61; Similarly, second end of second electric capacity 317 of the second sampling unit 3C (scheming not shown) also is electrically connected to reset voltage contact 61.First reset switch 601 is whether to control its conductings with first reset signal 60; And second reset switch 611 is whether to control its conductings with second reset signal 62.
Second data reading controller 252 shown in Fig. 6 B also comprises reset voltage contact 61 except comprising the element that goes out as shown in Figure 3, its 3rd sampling unit 3E then comprises the 3rd replacement switch 621 in addition; The 4th sampling unit 3G comprises quadruple in addition and puts switch 631.Second end of the 3rd electric capacity 327 of the 3rd sampling unit 3E (scheming not shown) is electrically connected to reset voltage contact 61; Similarly, second end of the 4th electric capacity 337 of the 4th sampling unit 3G (scheming not shown) also is electrically connected to reset voltage contact 61.The 3rd replacement switch 621 is whether to control its conductings with first reset signal 60; With 62 its conductings of control of second reset signal whether quadruple puts 631 on switch.
By that analogy, the 3rd data reading controller 253 shown in Fig. 6 C also comprises reset voltage contact 61 except comprising the element that goes out as shown in Figure 3, and its 5th sampling unit 3I then comprises the 5th reset switch 641 in addition; The 6th sampling unit 3K comprises sixfold in addition and puts switch 651.Second end of the 5th electric capacity 347 of the 5th sampling unit 3I (scheming not shown) is electrically connected to reset voltage contact 61; Similarly, second end of the 6th electric capacity 357 of the 6th sampling unit 3K (scheming not shown) also is electrically connected to reset voltage contact 61.Whether the 5th reset switch 641 controls its conductings with first reset signal 60 equally; And also with its conductings of second reset signal 62 control whether sixfold put switch 651.
Fig. 7 illustrates first sampled signal 30, second sampled signal 31, first and reads signal 304, the second reading number of winning the confidence 314, the third reading number of winning the confidence the 324, the 4th and read signal the 334, the 5th and read the waveform sequential chart that signal the 344, the 6th reads signal 354, first reset signal 60 and second reset signal 62.The operation and the function of first reset signal 60 and second reset signal 62 are described as follows now.
Before first sampled signal 30 makes the 5th change-over switch 345 conductings of the 3rd change-over switch 325 of first change-over switch 305, the 3rd sampling unit 3E of the first sampling unit 3A and the 5th sampling unit 3I simultaneously (before being waveform interval 40), first reset switch 601, the 3rd replacement switch 621 of the 3rd sampling unit 3E and the 5th reset switch 641 (being waveform interval 70) of the 5th sampling unit 3I that first reset signal 60 will the conducting first sampling unit 3A.
The voltage level of first electric capacity 307 can be adjusted into the voltage level that reset voltage contact 61 provides according to first reset signal, 60, the first reset switch 601; The 3rd replacement switch 621 can be adjusted into the voltage level that reset voltage contact 61 provides with the voltage level of the 3rd electric capacity 327; And the 5th reset switch 641 can be adjusted into the voltage level that reset voltage contact 61 provides with the voltage level of the 5th electric capacity 347.
Before second sampled signal 31 makes the 6th change-over switch 355 conductings of the 4th change-over switch 335 of second change-over switch 315, the 4th sampling unit 3G of the second sampling unit 3C and the 6th sampling unit 3K simultaneously (before being waveform interval 41), second reset switch 611 that second reset signal 62 will the conducting second sampling unit 3C, the quadruple of the 4th sampling unit 3G are put the sixfold of switch 631 and the 6th sampling unit 3K and are put switch 651 (being waveform interval 72).
The voltage level of second electric capacity 317 can be adjusted into the voltage level that reset voltage contact 61 provides according to second reset signal, 62, the second reset switch 611; Quadruple is put switch 631 can be adjusted into the voltage level that reset voltage contact 61 provides with the voltage level of the 4th electric capacity 337; And sixfold is put switch 651 and the voltage level of the 6th electric capacity 357 can be adjusted into the voltage level that reset voltage contact 61 provides.
Adjust the voltage level of first electric capacity 307, the 3rd electric capacity 327 and the 5th electric capacity 347 by first reset signal 60, it will be more correct that the first sampling unit 3A, the 3rd sampling unit 3E and the 5th sampling unit 3I read first data 302, the 3rd data 322 and the 5th data 342 that are produced behind the sensing signal 221,222,223, after avoiding first electric capacity 307, the 3rd electric capacity 327 and the 5th electric capacity 347 long-time uses, the distortion of reading sensing signal 221,222,223.Similarly, adjust second electric capacity 317 by second reset signal 62, the voltage level of the 4th electric capacity 337 and the 6th electric capacity 357, the second sampling unit 3C, the 4th sampling unit 3G and the 6th sampling unit 3K read sensing signal 221,222, second data 312 that 223 backs are produced, the 4th data 332 and the 6th data 352 will be more correct, to avoid second electric capacity 317, after the 4th electric capacity 337 and the 6th electric capacity 357 long-time the uses, read sensing signal 221,222,223 distortion, in view of the above, thus avoided the situation of erroneous judgement user's input to take place.
Other element of data reading controller 251,252,253 shown in Fig. 6 A, Fig. 6 B and Fig. 6 C also can be carried out as 251,252,253 the operation described and the functions of the data reading controller shown in Fig. 3, have the technical field of the invention know usually the knowledgeable can be directly acquainted with the data reading controller 251,252,253 shown in Fig. 6 A, Fig. 6 B and Fig. 6 C how based on the data reading controller shown in Fig. 3 251,252,253 to carry out same operation and function, so do not repeat them here.
Similarly, data reading controller 251,252,253 shown in Fig. 6 A, Fig. 6 B and Fig. 6 C can increase by first unity gain buffer, second unity gain buffer, the 3rd unity gain buffer, the 4th unity gain buffer, the 5th unity gain buffer and the 6th unity gain buffer respectively as data reading controller 251,252,253 illustrated in fig. 5.By the sustaining voltage mode, make first data 302, second data 312, the 3rd data 322, the 4th data 332, the 5th data 342 and the 6th data 352 that export touch-control control chip 27 to more stable.The knowledgeable that knows usually with the technical field of the invention works as the associative operation and the function that can be directly acquainted with unity gain buffer by the leading portion explanation, so do not repeat them here.
In sum, a plurality of sensing signals that display device of the present invention and data reading controller thereof can be exported touch-control type display module are exported via single contact, a large amount of demands that reduce the contact of output sensing signal, and then simplification circuit complexity, thereby reduce the manufacturing cost and the power consumption thereof of touch control display device, also can promote the usefulness of sensing user's input simultaneously.
The above embodiments only are used for exemplifying form of implementation of the present invention, and explain technical characterictic of the present invention, are not to be used for limiting protection category of the present invention.Any those of ordinary skills can unlabored change or the arrangement of the isotropism scope that all belongs to the present invention and advocated, the scope of the present invention should be as the criterion with the scope of the claim of enclosing.
Claims (22)
1. a data reading controller is applicable to a display device, and this data reading controller comprises:
One first read switch;
One second read switch;
One first sampling unit has one first contact and one second contact, and this first contact is in order to receiving a sensing signal, and produces one first data according to this sensing signal; And
One second sampling unit has one the 3rd contact and one the 4th contact, and the 3rd contact is in order to receiving this sensing signal, and produces one second data according to this sensing signal;
Wherein, when this second sampling unit produced these second data according to this sensing signal, this first read switch was to read signal according to one first to receive and export this first data by this second contact;
Wherein, when this first sampling unit produced these first data according to this sensing signal, this second read switch was to receive and export this second data according to a second reading number of winning the confidence by the 4th contact.
2. data reading controller as claimed in claim 1, wherein this first read switch is electrically connected to second contact of this first sampling unit, and this second read switch is electrically connected to the 4th contact of this second sampling unit.
3. data reading controller as claimed in claim 1, other comprises:
One first unity gain buffer is electrically connected to second contact and this first read switch of this first sampling unit, and these first data are by this first read switch output via this first unity gain buffer; And
One second unity gain buffer is electrically connected to the 4th contact and this second read switch of this second sampling unit, and these second data are by this second read switch output via this second unity gain buffer.
4. data reading controller as claimed in claim 1, wherein this first sampling unit comprises in addition:
One first change-over switch is electrically connected to first contact and second contact of this first sampling unit; And
One first electric capacity has one first end and one second end, and first end of this first electric capacity is electrically connected to second contact of this first sampling unit;
Wherein, when this first change-over switch received this sensing signal according to one first sampled signal, this first electric capacity produced this first data according to this sensing signal.
5. data reading controller as claimed in claim 4, other comprises a reset voltage contact, and in order to a reset voltage to be provided, wherein this first sampling unit comprises in addition:
One first reset switch is electrically connected to first end, second end and this reset voltage contact of this first electric capacity;
Wherein, when this second read switch was exported these second data according to this second reading number of winning the confidence, this first reset switch was according to one first reset signal one voltage level of this first electric capacity to be adjusted into this reset voltage.
6. data reading controller as claimed in claim 1, wherein this second sampling unit comprises in addition:
One second change-over switch is electrically connected to the 3rd contact and the 4th contact of this second sampling unit; And
One second electric capacity has one first end and one second end, and first end of this second electric capacity is electrically connected to the 4th contact of this second sampling unit;
Wherein, when this second change-over switch received this sensing signal according to one second sampled signal, this second electric capacity produced this second data according to this sensing signal.
7. data reading controller as claimed in claim 6, other comprises a reset voltage contact, and in order to a reset voltage to be provided, wherein this second sampling unit comprises in addition:
One second reset switch is electrically connected to first end, second end and this reset voltage contact of this second electric capacity;
Wherein, when this first read switch according to this first when reading signal and exporting these first data, this second reset switch is according to one second reset signal one voltage level of this second electric capacity to be adjusted into this reset voltage.
8. display device comprises:
One touch-control type display module, in order to export a plurality of sensing signals, these sensing signals comprise one first sensing signal and one second sensing signal;
One first data reading controller is electrically connected to this touch-control type display module, in order to receiving this first sensing signal, and produces one first data and one second data according to this first sensing signal; And
One second data reading controller is electrically connected to this touch-control type display module, in order to receiving this second sensing signal, and produces one the 3rd data and one the 4th data according to this second sensing signal;
Wherein, when this first data reading controller and this second data reading controller produce these second data and the 4th data simultaneously according to this first sensing signal and this second sensing signal respectively, this first data reading controller is to read signal according to one first to export this first data, and this second data reading controller is to export the 3rd data according to a third reading number of winning the confidence;
Wherein, when this first data reading controller and this second data reading controller produce these first data and the 3rd data simultaneously according to this first sensing signal and this second sensing signal respectively, this first data reading controller is to export this second data according to a second reading number of winning the confidence, and this second data reading controller is to read signal according to one the 4th to export the 4th data.
9. display device as claimed in claim 8, wherein this first data reading controller comprises in addition:
One first read switch;
One second read switch;
One first sampling unit has one first contact and one second contact, and this first contact is in order to receiving this first sensing signal, and produces this first data according to this first sensing signal; And
One second sampling unit has one the 3rd contact and one the 4th contact, and the 3rd contact is in order to receiving this first sensing signal, and produces this second data according to this first sensing signal;
Wherein, when this second sampling unit produces these second data according to this first sensing signal, this first read switch be according to this first read signal by this second contact receive these first data and output;
Wherein, when this first sampling unit produced these first data according to this first sensing signal, this second read switch was to receive these second data and output according to this second reading number of winning the confidence by the 4th contact.
10. display device as claimed in claim 9, wherein this first read switch is electrically connected to second contact of this first sampling unit, and this second read switch is electrically connected to the 4th contact of this second sampling unit.
11. display device as claimed in claim 9, wherein this first reading of data controller comprises in addition:
One first unity gain buffer is electrically connected to second contact and this first read switch of this first sampling unit, and these first data are by this first read switch output via this first unity gain buffer; And
One second unity gain buffer is electrically connected to the 4th contact and this second read switch of this second sampling unit, and these second data are by this second read switch output via this second unity gain buffer.
12. display device as claimed in claim 9, wherein this first sampling unit comprises in addition:
One first change-over switch is electrically connected to first contact and second contact of this first sampling unit; And
One first electric capacity has one first end and one second end, and first end of this first electric capacity is electrically connected to second contact of this first sampling unit;
Wherein, when this first change-over switch received this first sensing signal according to one first sampled signal, this first electric capacity produced this first data according to this first sensing signal.
13. display device as claimed in claim 12, other comprises a reset voltage contact, and in order to a reset voltage to be provided, wherein this first sampling unit comprises in addition:
One first reset switch is electrically connected to first end, second end and this reset voltage contact of this first electric capacity;
Wherein, when this second read switch was exported these second data according to this second reading number of winning the confidence, this first reset switch was according to one first reset signal one voltage level of this first electric capacity to be adjusted into this reset voltage.
14. display device as claimed in claim 9, wherein this second sampling unit comprises in addition:
One second change-over switch is electrically connected to the 3rd contact and the 4th contact of this second sampling unit; And
One second electric capacity has one first end and one second end, and first end of this second electric capacity is electrically connected to the 4th contact of this second sampling unit;
Wherein, when this second change-over switch received this first sensing signal according to one second sampled signal, this second electric capacity produced this second data according to this first sensing signal.
15. display device as claimed in claim 14, other comprises a reset voltage contact, and in order to a reset voltage to be provided, wherein this second sampling unit comprises in addition:
One second reset switch is electrically connected to first end, second end and this reset voltage contact of this second electric capacity;
Wherein, when this first read switch according to this first when reading signal and exporting these first data, this second reset switch is according to one second reset signal one voltage level of this second electric capacity to be adjusted into this reset voltage.
16. display device as claimed in claim 8, wherein this second data reading controller comprises in addition:
One third reading takes away the pass;
One the 4th read switch;
One the 3rd sampling unit has one the 5th contact and one the 6th contact, and the 5th contact is in order to receiving this second sensing signal, and produces the 3rd data according to this second sensing signal; And
One the 4th sampling unit has one the 7th contact and one the 8th contact, and the 7th contact is in order to receiving this second sensing signal, and produces the 4th data according to this second sensing signal;
Wherein, when the 4th sampling unit produced the 4th data according to this second sensing signal, this third reading takes away and closes was to receive the 3rd data and output according to this third reading number of winning the confidence by the 6th contact;
Wherein, when the 3rd sampling unit produced the 3rd data according to this second sensing signal, the 4th read switch was to read signal according to the 4th to receive the 4th data and output by the 8th contact.
17. display device as claimed in claim 16, wherein this third reading takes away and closes the 6th contact that is electrically connected to the 3rd sampling unit, and the 4th read switch is electrically connected to the 8th contact of the 4th sampling unit.
18. display device as claimed in claim 16, wherein this second reading controller that fetches data comprises in addition:
One the 3rd unity gain buffer, the 6th contact and this third reading that are electrically connected to the 3rd sampling unit take away the pass, and the 3rd data are to take away by this third reading via the 3rd unity gain buffer to close output; And
One the 4th unity gain buffer is electrically connected to the 8th contact and the 4th read switch of the 4th sampling unit, and the 4th data are by the output of the 4th read switch via the 4th unity gain buffer.
19. display device as claimed in claim 16, wherein the 3rd sampling unit comprises in addition:
One the 3rd change-over switch is electrically connected to the 5th contact and the 6th contact of the 3rd sampling unit; And
One the 3rd electric capacity has one first end and one second end, and first end of the 3rd electric capacity is electrically connected to the 5th contact of the 3rd sampling unit;
Wherein, when the 3rd change-over switch received this second sensing signal according to one the 3rd sampled signal, the 3rd electric capacity produced the 3rd data according to this second sensing signal.
20. display device as claimed in claim 19, other comprises a reset voltage contact, and in order to a reset voltage to be provided, wherein the 3rd sampling unit comprises in addition:
One the 3rd replacement switch is electrically connected to first end, second end and this reset voltage contact of the 3rd electric capacity;
Wherein, when the 4th read switch read signal and exports the 4th data according to the 4th, the 3rd replacement switch was according to one the 3rd replacement signal one voltage level of the 3rd electric capacity to be adjusted into this reset voltage.
21. this display device as claimed in claim 16, wherein the 4th sampling unit comprises in addition:
One the 4th change-over switch is electrically connected to the 7th contact and the 8th contact of the 4th sampling unit; And
One the 4th electric capacity has one first end and one second end, and first end of the 4th electric capacity is electrically connected to the 8th contact of the 4th sampling unit;
Wherein, when the 4th change-over switch received this second sensing signal according to one the 4th sampled signal, the 4th electric capacity produced the 4th data according to this second sensing signal.
22. display device as claimed in claim 21, other comprises a reset voltage contact, and in order to a reset voltage to be provided, wherein the 4th sampling unit comprises in addition:
One quadruple is put switch, is electrically connected to first end, second end and this reset voltage contact of the 4th electric capacity;
Wherein, when this third reading takes away the pass when exporting the 3rd data according to this third reading number of winning the confidence, it is to put signal according to a quadruple one voltage level of the 4th electric capacity is adjusted into this reset voltage that this quadruple is put switch.
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| CN2008101340946A CN101349957B (en) | 2008-07-29 | 2008-07-29 | Data reading controller thereof |
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| CN2008101340946A CN101349957B (en) | 2008-07-29 | 2008-07-29 | Data reading controller thereof |
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| CN2010101356250A Division CN101788868B (en) | 2008-07-29 | 2008-07-29 | Display device |
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| CN102640228A (en) * | 2009-09-28 | 2012-08-15 | 北极硅设备公司 | Input configuration for analog to digital converter |
| WO2017012221A1 (en) * | 2015-07-17 | 2017-01-26 | 深圳市汇顶科技股份有限公司 | Capacitance sensing circuit and self-capacitive touch-control panel |
| CN107209602A (en) * | 2015-02-02 | 2017-09-26 | 苹果公司 | Flexible self-capacitance and mutual capacitance touch sensing system framework |
| CN109410869A (en) * | 2018-12-11 | 2019-03-01 | 惠科股份有限公司 | A kind of read method of data, reading device and display device |
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| CN102640228A (en) * | 2009-09-28 | 2012-08-15 | 北极硅设备公司 | Input configuration for analog to digital converter |
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| WO2017012221A1 (en) * | 2015-07-17 | 2017-01-26 | 深圳市汇顶科技股份有限公司 | Capacitance sensing circuit and self-capacitive touch-control panel |
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| CN109410869A (en) * | 2018-12-11 | 2019-03-01 | 惠科股份有限公司 | A kind of read method of data, reading device and display device |
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