CN101620489A - Capacitive touch electroluminescence display screen - Google Patents
Capacitive touch electroluminescence display screen Download PDFInfo
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- CN101620489A CN101620489A CN200810127922A CN200810127922A CN101620489A CN 101620489 A CN101620489 A CN 101620489A CN 200810127922 A CN200810127922 A CN 200810127922A CN 200810127922 A CN200810127922 A CN 200810127922A CN 101620489 A CN101620489 A CN 101620489A
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- electroluminescence display
- pressure district
- capacitive touch
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- display screen
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Abstract
The invention discloses a capacitive touch electroluminescence display screen which combines an electroluminescence display panel and a capacitive touch panel; wherein, the electroluminescence display panel is electrically connected with a driving circuit to receive voltage generated by the driving circuit; the periodic waveform of the voltage comprises a relatively high voltage zone and a relatively low voltage zone, and the relatively high voltage zone drives the electroluminescence display panel for luminescence; the capacitive touch panel is positioned on the surface of the electroluminescence display panel and is electrically connected with a controller; when the electroluminescence display panel is positioned in the relatively low voltage zone, the controller measures the capacity change of the capacitive touch panel. The capacitive touch electroluminescence display screen utilizes time difference to avoid electric field interference to the capacitive touch panel by the relatively high voltage zone.
Description
[technical field]
The invention relates to a kind of touch control screen, and particularly relevant for a kind of capacitance type touch-control panel.
[background technology]
Along with scientific-technical progress, computer-related devices constantly progresses greatly, and wherein for example mouse, keyboard and electronic whiteboard or the like make rapid progress the information input equipment of computing machine especially.In recent years, pursue under the compact trend at electronic product, handwriting input device becomes the main flow of data input.Under this trend, a kind of combine input and the Touch Screen of Presentation Function just in response to and give birth to.Be different from traditional keyboard or mouse, Touch Screen is that a contact panel directly is attached on the display screen, significantly reduces the shared space of keyboard or mouse.Contact panel is in conjunction with the input interface of hommization, and the user need instruct or learn hardly, can directly operate according to the indication of the function on the picture with finger or pointer.The application of contact panel is very extensive, for example flat computer, mobile phone, PDA and cash machine etc.
In general, the nib that contact panel can detect user's finger tip or pointer is contacted with the position coordinate value of contact panel, again in conjunction with the instruction on the picture of display screen, and produces the input data.The method of its detection of contact panel technical basis at present is different and divide into condenser type, resistance-type, infrared-type and optical profile type etc., is main flow with condenser type and resistance-type wherein.
Electric resistance touch-control panel is to utilize that changes in resistance detects on the panel, and it mainly is made up of two substrates with electrode.Two substrates do not contact at ordinary times, and resistance is bigger.When the user pushed, the electrode on the two substrates then contacted and conducting, made resistance descend, and detected pushing of user by this.
Capacitance type touch-control panel then is to utilize a laminar substrate and the transparency electrode that is arranged on the substrate to detect.When user's contact surface plate, can change the electric field of panel and the electric capacity of panel surface, learn the position that the user touches by this.Because capacitance type touch-control panel only needs a laminar substrate, its penetrability is good than resistance-type.Capacitance type touch-control panel fire line, soil resistance, scratch resistance are good in addition, and reaction velocity is fast, so in surplus various electronic equipments of widespread use and the commercial unit.
Usually the display screen of capacitance type touch-control panel collocation has cathode-ray tube display (cathode ray tubedisplay, CRT display) and LCD (liquid crystal display, LCD), aquatic foods be applied to less electroluminescent display (electro-luminescent display, ELD) in.It is former because the surface field of electroluminescent display is very high, the electric field of serious interference capacitors formula contact panel.Yet electroluminescent display has characteristics such as own luminous, full solidification, high resolving power and high visual angle, and range of application is expected greater than cathode-ray tube (CRT) or LCD.Therefore, industrial community is desired most ardently the bottleneck of breaking through capacitance type touch-control panel and electroluminescent display combination invariably.
In view of this, need a kind of new touch control screen and preparation method thereof, can avoid electroluminescent display that the electric field of capacitance type touch-control panel is disturbed simultaneously in conjunction with capacitance type touch-control panel and electroluminescent display.
[summary of the invention]
An aspect of of the present present invention is to provide a kind of capacitive touch electroluminescence display screen, in conjunction with an electroluminescence display panel and a capacitance type touch-control panel, avoids when electroluminescence display panel drives the interference to capacitance type touch-control panel simultaneously.The electroluminescence display panel of capacitive touch electroluminescence display screen electrically connects one drive circuit, and to receive the voltage that driving circuit produces, wherein the periodic waveform of voltage comprises a relatively high pressure district and a relatively low pressure district.Capacitance type touch-control panel is positioned on the surface of electroluminescence display panel.One controller electrically connects capacitance type touch-control panel, in order to detect the capacitance variations on the capacitance type touch-control panel.Wherein, when electroluminescence display panel was in the relatively low pressure district, controller was measured the capacitance variations of capacitance type touch-control panel.
Hence one can see that, the capacitive touch electroluminescence display screen of present embodiment utilizes the mistiming, allow controller avoid the time that electroluminescence display panel drives, meaning is the time of relatively high pressure district effect, and only measure in action time, so can avoid of the interference of relatively high pressure district to electric field in the relatively low pressure district.
The present invention is to provide a kind of capacitive touch electroluminescence display screen on the other hand, and capacitance type touch-control panel is installed on the surface of electroluminescence display panel, the problem that both electric fields of can preventing simultaneously disturb.Capacitive touch electroluminescence display screen mainly contains one drive circuit and electrically connects an electroluminescence display panel, and driving circuit produces a plurality of pulse waves, and luminous in order to drive electroluminescence display panel, wherein pulse wave is arranged according to the time sequencing each interval.One capacitance type touch-control panel is positioned on the surface of electroluminescence display panel, and electrically connects a controller.Wherein, controller is measured the capacitance variations of capacitance type touch-control panel at the high voltage pulse wave that drives electroluminescence display panel with in the interval time between the pulse wave.
When electroluminescence display panel received pulse wave, the high voltage of pulse wave can drive electroluminescence display panel, also can produce strong interference to capacitance type touch-control panel.Therefore, the controller of present embodiment utilizes the mistiming, measures in the aperture time between pulse wave, avoids pulse wave, can avoid the interference of electric field.
The present invention provides a kind of method of operating on the other hand, in order to control a capacitive touch electroluminescence display screen with an electroluminescence display panel and a capacitance type touch-control panel, electricity produces the phenomenon of disturbing between electroluminescence display panel and the capacitance type touch-control panel to get rid of.First step of method of operating is the voltage that generation one has periodic waveform, and wherein periodic waveform comprises a relatively high pressure district and a relatively low pressure district.Then, utilize the relatively high pressure district to drive electroluminescence display panel.The relatively low pressure district the time, measure the capacitance variations of capacitance type touch-control panel.
When relatively high pressure can be distinguished the driving electroluminescence display panel, can produce strong electric field, and the capacitance measurement of capacitance type touch-control panel is caused interference.So, adopt periodic waveform to drive electroluminescence display panel, can provide the electroluminescence display panel time of having a rest on the one hand, avoid its long-time luminous and its term of life of loss.On the other hand, utilize this section time of having a rest to carry out the capacitance measurement of capacitance type touch-control panel, also can avoid the interference of electric field.
[description of drawings]
For above and other objects of the present invention, feature, advantage and embodiment can be become apparent, appended graphic being described in detail as follows:
Fig. 1 illustrates the calcspar of capacitive touch electroluminescence display screen according to an embodiment of the invention.
Fig. 2 is according to the shown capacitive touch electroluminescence display screen of Fig. 1, illustrates the curve map of the voltage swing of the voltage that driving circuit produces to time relationship.
Fig. 3 illustrates the calcspar of capacitive touch electroluminescence display screen according to another embodiment of the present invention.
Fig. 4 illustrates the process flow diagram of the method for operating of capacitive touch electroluminescence display screen according to another embodiment of the present invention.
[embodiment]
Please refer to Fig. 1, it illustrates the calcspar of capacitive touch electroluminescence display screen 100 according to an embodiment of the invention.Capacitive touch electroluminescence display screen 100 mainly comprises an electroluminescence display panel 110 and a capacitance type touch-control panel 120.Electroluminescence display panel 110 electrically connects one drive circuit 130, receives the voltage that driving circuit 130 produces.Capacitance type touch-control panel 120 is positioned on the surface of electroluminescence display panel 110, and electrically connects a controller 140.Controller 140 is the capacitance variations that are used for detecting on the capacitance type touch-control panel 120.Be described in detail as follows.
In general, electroluminescence display panel 110 mainly has two-layer battery lead plate up and down, sandwich one deck luminescent substance.When the electrode on the two-layer battery lead plate applies an impressed voltage, can between two electrodes, form a high electric field, the electronics that orders about in the luminescent substance combines with electric hole, and gives off light.Be familiar with kind and characteristic that present technique field person all knows electroluminescent principle and luminescent substance, no longer add to give unnecessary details at this.
In the present embodiment, capacitance type touch-control panel 120 is to be fitted on the surface of electroluminescence display panel 110, and the light that electroluminescence display panel 110 is sent can penetrate capacitance type touch-control panel 120, is resent in user's eye.In other words, the light transmission of capacitance type touch-control panel 120 gets high.In the present embodiment, capacitance type touch-control panel 120 has a transparent substrate, as glass substrate, and arranges a plurality of transparency electrodes 122 on substrate, and each transparency electrode 122 all is electrically connected to controller 140.Be familiar with present technique field person and all know, controller 140 is by the change of voltage or electric current on the measurement transparency electrode 122, records capacitance variations on the capacitance type touch-control panel 120.For instance, electric current calculates the time of charge or discharge to the variation of time to comparatively common a kind of measuring method on the transparency electrode 122 in order to measure, and then extrapolates corresponding capacitance size.Notice at this for example only as an illustration, is not in order to limiting scope of the present invention, and every method of measuring the capacitance variations of capacitance type touch-control panel 120 all can be applicable in the present embodiment.
Please also refer to Fig. 1 and Fig. 2.Fig. 2 illustrates the curve map of the voltage swing of voltage 200 to time relationship, promptly represents the output waveform of driving circuit 130.Driving circuit 130 can produce a plurality of pulse waves 212 according to time sequencing, and each interval is arranged.In other words, voltage 200 comprises a plurality of periodic waves, and a relatively high pressure district 214 and a relatively low pressure district 216 are arranged in each periodic waveform 210, and the voltage in relatively low pressure district 216 is less than relatively high pressure district 214, i.e. the voltage of pulse wave 212.Wherein, relatively high pressure district 214 refers to have the wave band of pulse wave 212, and the gap that relatively low pressure district 216 refers between pulse wave 212 and the pulse wave 212.
When electroluminescence display panel 110 receives pulse wave 212, promptly during relatively high pressure district 214, can be driven by it and luminous.Otherwise, when electroluminescence display panel 110 receives relatively low pressure district 216, then not luminous.Be familiar with present technique field person and all know,, make electroluminescence display panel 110 obtain the rest of appropriateness, effectively prolong its term of life by pulse wave 212 is produced at interval.
Yet as previously mentioned, when electroluminescence display panel 110 was luminous, its surface field was very high, can have a strong impact on the electric field of capacitance type touch-control panel 120, and then influences the measurement of its capacitance variations.
For the electric field of getting rid of between the two disturbs, the mistiming that the capacitive touch electroluminescence display screen 100 of present embodiment utilizes pulse wave 212 to produce, allow controller 140 measure the capacitance variations of capacitance type touch-control panel 120 in the time interval between pulse wave 212 and pulse wave 212.That is to say that controller 140 is avoided the luminous period of electroluminescence display panel 110, be i.e. the period of relatively high pressure district 214 effects, only when relatively low pressure district 216, measure the capacitance variations of capacitance type touch-control panel 120.Thus, the electric field that just can avoid between electroluminescence display panel 110 and the capacitance type touch-control panel 120 disturbs.
Particularly, capacitive touch electroluminescence display screen 100 has a clock pulse generator 150, electrically connects driving circuit 130, the time of the pulse wave 212 of control Driver Circuit 130 outputs, the just cycle in relatively high pressure district 214 and relatively low pressure district 216.In more detail, clock pulse generator 150 can produce the signal of first period and second period according to time sequencing, and first period and second period are staggered in regular turn.Then clock pulse generator 150 can pass the signal along to driving circuit 130, allows driving circuit 130 produce pulse wave 212 in first period.That is to say that driving circuit 130 produces relatively high pressure district 214 in first period, in second period, produce relatively low pressure district 216.
On the other hand, controller 140 also electrically connects clock pulse generator 150, receives the signal of first period and second period.Thus, controller 140 just can be exactly in the relatively low pressure district 216 times that produce, carry out the measurement of the capacitance variations of capacitance type touch-control panel 120 in second period just.
On the other hand, be familiar with present technique field person and know, every by action such as pushing start person, must face the problem of press component spring (bounce), present embodiment is as the same.When the user pushed capacitance type touch-control panel 120, its part of pushing can usually repeat contact as bound, just can stablize after after a while, so controller 140 can measure touching repeatedly.Otherwise, when the user leaves capacitance type touch-control panel 120, also can take place once again once to bounce.For fear of because of bounce, and with user's operational motion erroneous judgement multi-pass operations action once, therefore a plurality of cycles that controller 140 can continuous coverage voltages 200, interim measured capacitance variations is judged as the single job action during with the relatively low pressure district 216 in these cycles.
In the present embodiment, controller 140 and driving circuit 130 are all unified to provide time signal by clock pulse generator 150, and controller 140 can be measured in the period in relatively low pressure district 216 exactly.In another embodiment of the present invention, then make controller 140 connect driving circuit 130, to obtain the time signal of driving circuit 130.Specify as follows.
Please also refer to Fig. 2 and Fig. 3.Fig. 3 illustrates the calcspar of capacitive touch electroluminescence display screen 100 according to another embodiment of the present invention.Wherein, have a clock pulse measuring appliance 160 in the controller 140, electrically connect driving circuit 130, can measure the time and the interlude of the pulse wave 212 that driving circuit 130 produced, just the cycle in relatively high pressure district 214 and relatively low pressure district 216.Thus, controller 140 just can be learnt correct Measuring Time.
In sum, the disclosed capacitive touch electroluminescence display screen 100 of the present invention utilizes the characteristic of electroluminescence display panel 110, kind mistiming with high low-voltage in the voltage 200, measure in the aperture time between pulse wave 212, avoid the interference of electric field that pulse wave 212 produced capacitance type touch-control panel 120.Need not change the structure of electroluminescence display panel 110 or capacitance type touch-control panel 120, can break through both restrictions, expand the usable range of electroluminescence display panel 110 and capacitance type touch-control panel 120 greatly.
Please refer to Fig. 4, it illustrates the process flow diagram of the method for operating 400 of a capacitive touch electroluminescence display screen.Capacitive touch electroluminescence display screen has an electroluminescence display panel and a capacitance type touch-control panel.
Particularly, method of operating 400 includes four steps, and first step 410 is the voltage that generation one has periodic waveform, and wherein periodic waveform comprises a relatively high pressure district and a relatively low pressure district.In the present embodiment, the voltage swing in relatively high pressure district is enough to drive electroluminescence display panel and carries out luminescence-producing reaction, and the voltage swing in relatively low pressure district is then not enough so that it is luminous.
Then be step 420: utilize the relatively high pressure district to drive electroluminescence display panel.As previously mentioned, when electroluminescence display panel is applied high voltage, can form a high electric field in panel, the luminescent substance that orders about in the electroluminescence display panel gives off light.Otherwise, when electroluminescence display panel receives the relatively low pressure district, then not luminous.Thus, electroluminescence display panel just can intermittent luminous and rest.
Step 430: measure the time in relatively high pressure district and relatively low pressure district, to learn relatively high pressure district and relatively low pressure district generation time accurately, with fluorescent lifetime and the time of having a rest that calculates electroluminescence display panel.
Then, step 440 is when the relatively low pressure district, measures the capacitance variations of capacitance type touch-control panel.As previously mentioned, when electroluminescence display panel is luminous, can have a strong impact on the measurement of the capacitance variations of capacitance type touch-control panel.Therefore, when electroluminescence display panel is non-luminous, carry out the capacitance measurement of capacitance type touch-control panel, can avoid disturbing.
Though the present invention discloses as above with a plurality of embodiment; right its is not in order to limit the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (10)
1. capacitive touch electroluminescence display screen comprises:
One electroluminescence display panel;
One drive circuit is electrically connected to this electroluminescence display panel, and has the voltage of periodic waveform and drive this electroluminescence display panel in order to produce one, and wherein this periodic waveform comprises a relatively high pressure district and a relatively low pressure district;
One capacitance type touch-control panel is positioned on the surface of this electroluminescence display panel; And
One controller electrically connects this capacitance type touch-control panel, measures the capacitance variations of this capacitance type touch-control panel when being used to this relatively low pressure district.
2. capacitive touch electroluminescence display screen according to claim 1 is characterized in that, this relatively high pressure district the time, this electroluminescence display panel of this driven is luminous.
3. capacitive touch electroluminescence display screen according to claim 1 is characterized in that, more comprises a clock pulse generator, electrically connects this driving circuit and this clock pulse generator, controls the cycle in this relatively high pressure district and this relatively low pressure district.
4. capacitive touch electroluminescence display screen according to claim 3, it is characterized in that, this clock pulse generator produces one first period and one second period according to time sequencing, and wherein this driving circuit produces this relatively high pressure district in this first period, produces this relatively low pressure district in this second period.
5. capacitive touch electroluminescence display screen according to claim 1 is characterized in that, this controller comprises a clock pulse measuring appliance, electrically connects this driving circuit, measures the cycle in this relatively high pressure district and this relatively low pressure district.
6. capacitive touch electroluminescence display screen according to claim 1 is characterized in that, a plurality of cycles of this this voltage of controller continuous coverage.
7. capacitive touch electroluminescence display screen comprises:
One drive circuit, in order to produce a plurality of pulse waves, wherein those pulse waves are arranged according to the time sequencing each interval;
One electroluminescence display panel electrically connects this driving circuit, and it is luminous that wherein those pulse waves drive this electroluminescence display panel;
One capacitance type touch-control panel is positioned on the surface of this electroluminescence display panel; And
One controller electrically connects this capacitance type touch-control panel, measures the capacitance variations of this capacitance type touch-control panel in the interval of those pulse waves.
8. capacitive touch electroluminescence display screen according to claim 7 is characterized in that, more comprises a clock pulse generator, electrically connects this driving circuit, controls the time of this pulse wave.
9. the method for operating of a capacitive touch electroluminescence display screen comprises:
Generation one has the voltage of periodic waveform, and wherein this periodic waveform comprises a relatively high pressure district and a relatively low pressure district;
Utilize this relatively high pressure district of this voltage to drive an electroluminescence display panel; And
In this relatively low pressure district of this voltage, measure the capacitance variations of a capacitance type touch-control panel.
10. method of operating according to claim 9 is characterized in that, more comprises the cycle that measures this relatively high pressure district and this relatively low pressure district.
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| CN2008101279223A CN101620489B (en) | 2008-07-02 | 2008-07-02 | Capacitive touch electroluminescence display screen |
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| CN2008101279223A CN101620489B (en) | 2008-07-02 | 2008-07-02 | Capacitive touch electroluminescence display screen |
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| CN101620489A true CN101620489A (en) | 2010-01-06 |
| CN101620489B CN101620489B (en) | 2011-02-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760405A (en) * | 2012-07-11 | 2012-10-31 | 深圳市华星光电技术有限公司 | Display device and imaging displaying and touch sensing method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101059738A (en) * | 2006-04-20 | 2007-10-24 | 铼宝科技股份有限公司 | Upper shining type organic shining diode transparent touch screen |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760405A (en) * | 2012-07-11 | 2012-10-31 | 深圳市华星光电技术有限公司 | Display device and imaging displaying and touch sensing method thereof |
| WO2014008681A1 (en) * | 2012-07-11 | 2014-01-16 | 深圳市华星光电技术有限公司 | Display device and image displaying and touch sensing method thereof |
| CN102760405B (en) * | 2012-07-11 | 2015-01-21 | 深圳市华星光电技术有限公司 | Display device and imaging displaying and touch sensing method thereof |
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| CN101620489B (en) | 2011-02-09 |
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Granted publication date: 20110209 Termination date: 20110702 |