CN101303828B - Method for driving circuit of field emission backlight panel - Google Patents
Method for driving circuit of field emission backlight panel Download PDFInfo
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- CN101303828B CN101303828B CN200710098295A CN200710098295A CN101303828B CN 101303828 B CN101303828 B CN 101303828B CN 200710098295 A CN200710098295 A CN 200710098295A CN 200710098295 A CN200710098295 A CN 200710098295A CN 101303828 B CN101303828 B CN 101303828B
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- field emission
- backlight panel
- driving circuit
- voltage
- emission backlight
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Abstract
The invention relates to a field-emission backlighting panel circuit driving method, which controls an emitter to emit alternatively electrons by transmitting a group of driving signals provided with phase diversities to the emitters in the field-emission panel. The driving method of the invention can increase the illuminating size of the field-emission panel and increase the brightness and evenness thereof.
Description
Technical field
The invention relates to a kind of driving method, refer to a kind of circuit drive method that is applicable to field emission backlight panel especially.
Background technology
In present display technology field, generally with fluorescent tube, as: cold cathode fluorescent lamp (CCFL), HCFL (HCFL) or light emitting diode (LED) are with as source backlight, yet, promote and make under the technological breakthrough of enlarged areas in panel technology, the development of giant display has been inevitable trend.Again, for giant display, if it uses fluorescent tube is the words in source backlight, doubts such as the not strong or mercury pollution of structure are then arranged, yet, if pointolites such as its application light emitting diode then have the doubt that is difficult for evenly diffusing into area source, so need many blooming pieces so that uniform area light source to be provided with as source backlight.Therefore, develop at present and with structure strong and luminous uniform field emission panel as the technology of backlight.
The principle of luminosity of field emission panel mainly is to utilize gate to apply the emission of high electric field with electron source on the control cathode plate, and ejected electron be subjected to voltage on the positive plate attraction and on the sunny side pole plate quicken, bombarding the fluorescent material that is coated with to the positive plate, send radiance with the fluorescence excitation material thereby make fluorescent material absorb the portion of energy that electronics carries.
Yet in known skill, the gate of field emission panel and the voltage of electron emitter need cooperate and drives and make driving method complicated, and electron emitter and gate need be made respectively and increase the field emission panel manufacture difficulty and reduce its light-emitting area.
Summary of the invention
A purpose of the present invention is that a kind of method for driving circuit of field emission backlight panel is being provided, and can increase the light-emitting area of field emission backlight panel.
Another object of the present invention is that a kind of method for driving circuit of field emission backlight panel is being provided, and can increase the brightness and the homogeneity of field emission backlight panel.
Another object of the present invention is that a kind of method for driving circuit of field emission backlight panel is being provided, and enables to save manufacturing cost.
For reaching above-mentioned purpose, the invention provides a kind of method for driving circuit of field emission backlight panel, be applicable to a field emission backlight panel, form most emitters on it, this emitter is to be divided into plural groups, and above-mentioned driving method comprises the following steps: to produce a frequency signal; Produce the plurality of drive signal according to this frequency signal; Change the voltage of this drive signal; And will import this group emitter backlight panel respectively through this drive signal of changing voltage.
Above-mentioned field emission backlight panel can comprise the field emission panel of various kenels, so is preferably the field emission panel that comprises a positive plate, a minus plate and at least one separation material, and is more preferred from most the emission groups that most emitters are set on the minus plate.The structure of above-mentioned positive plate and minus plate is an indefinite, so be preferably flat board, and positive plate is more preferred from the flat board that comprises a fluorescent material, and the material of making separation material is an indefinite, and it can be the material of glass or polyamide (Polyimide) or other vacuum-resistant or high pressure.
The production method of above-mentioned emitter is an indefinite, so be preferably with an electron source material and the stacking mode of a conductive material and make, and be more preferred from use one electron source material and conductive material potpourri making, secondly, the profile of above-mentioned emitter is indefinite also, so is preferably strip.Above-mentioned electron source material can be the lower material of arbitrary work function, as: silicon, metal or carbon-based material, and be preferably polysilicon, molybdenum, niobium, tungsten, diamond film or CNT etc.
Above-mentioned drive signal can be via the one scan driver element with the voltage of input field emission backlight panel with the control emitter, can be earlier before right its input field emission backlight panel be electrically connected at voltage conversion unit between scan drive cell and the field emission backlight panel with the voltage transitions of drive signal via one, voltage conversion unit is preferably the drive signal processing of boosting.Therefore, when the voltage of drive signal control emitter is a high voltage, this emitter promptly as a gate so that the contiguous signal controlling voltage that is driven is that the electric field attracts that the emitter of a low-voltage is subjected to it is sent at least one electronics, yet the alternating voltage that is preferably control adjacent transmission body is changed current potential and is alternately sent electronics in the different time points that continues between high and low voltage.
Secondly, the number of above-mentioned drive signal is an indefinite, and so it is preferably two, and is more preferred from a pair of strange, the even drive signal that corresponds to odd number row's emitter and even numbers row emitter respectively.Then, the characteristic electron of above-mentioned drive signal is an indefinite, and so its cycle is preferably the cycle integral multiple of frequency signal, and is more preferred from two times.Again, the characteristic electron between the above-mentioned drive signal is that indefinite is relevant, yet, be preferably the phase place difference between it, and be more preferred from frequency or the cycle identical.In addition, the waveform of above-mentioned drive signal is an indefinite, and so it is preferably the electric wave of voltage between a high reference voltage and a low reference voltage, and is more preferred from a square wave.
Therefore, method for driving circuit of field emission backlight panel of the present invention is by transmitting one group of emitter with drive signal of phase difference to field emission panel, alternately send electronics with the control emitter, and increase the luminous area of field emission panel and increase its brightness and homogeneity.
Description of drawings
Fig. 1 is the field emission backlight panel system architecture diagram of the present invention's first preferred embodiment;
Fig. 2 is the field emission panel cut-open view of the present invention's first preferred embodiment;
Fig. 3 is the method for driving circuit of field emission backlight panel process flow diagram of the present invention's first preferred embodiment;
Fig. 4 is the circuit of field emission backlight panel electronic signal synoptic diagram of the present invention's first preferred embodiment;
Fig. 5 is the field emission panel cut-open view of another preferred embodiment of the present invention.
The primary clustering symbol description
Field emission backlight panel 1 field emission panel 11 scan drive cells 12
Power-supply unit 13 voltage conversion units 14 positive plates 111
Emitter 115 gate layers 116
Step 310,320,330,340
Embodiment
About the present invention's first preferred embodiment, please refer to Fig. 1～Fig. 4.
At first, please refer to Fig. 1, as shown in FIG., field emission backlight panel 1 comprises a field emission panel 11, one scan driver element 12, a power-supply unit 13 and a voltage conversion unit 14.Power-supply unit 13 electrically connects scan drive cell 12, and voltage conversion unit 14 is electrically connected between field emission panel 11 and the scan drive cell 12.
Please in the lump with reference to figure 2, it shows the sectional view at II ' the line segment place of corresponding diagram 1 field emission panel 11 in addition.As shown in FIG., field emission panel 11 mainly is made of a positive plate 111, a minus plate 112 and a clearance layer 113, wherein pollute or damage minus plate 112 to prevent impurity molecule for the low-pressure state near vacuum in the space, and in the present embodiment, air pressure maintains below the 10-7torr.
The positive plate 111 of present embodiment is a transparent conducting plate, as: indium tin oxide (IndiumTin Oxide, ITO), and be applied in a positive voltage, then, be formed with one deck fluorescent material 114 on the positive plate 111, the composition of fluorescent material 114 can be high voltage fluorescent material or low-voltage fluorescent material, its differences is different at luminous operating voltage height, therefore, when fluorescent material 114 was subjected to having electron bombard above the operating voltage energy, it was excited and sends radiance, and the fluorescent material 114 of present embodiment is to send white light.
The minus plate 112 of present embodiment is a silicon substrate, be formed with a plurality of emitters 115 on it, it uses an electron source material to make, as: a CNT and a conductive material, as the mixed slurry of a metal, and form its strip outward appearance by fabrography at minus plate 112, the emitter 115 of present embodiment is to be divided into two groups, odd number row emitter 115 1 ends are to electrically connect mutually to form one group, and even numbers row emitter 115 1 ends are to electrically connect to form another group mutually.
The clearance layer 113 of present embodiment is good, not outgas and the good polyamide of involution of physical strength, and it is kept has a spacing and keep therebetween infrabar between positive plate 111 and the minus plate 112.
Secondly, please in the lump with reference to figure 3 and Fig. 4, wherein Fig. 3 shows the method for driving circuit of field emission backlight panel process flow diagram of present embodiment, and Fig. 4 shows the electronic signal synoptic diagram of present embodiment.
In the present embodiment, scan drive cell 12 produces a frequency signal (CLK) with the oscillator (not shown) in it, and it is the periodic square wave (step 310) of alternate cycles between a high reference voltage and a low reference voltage.Afterwards, scan drive cell 12 produces a pair of strange, even drive signal (ODD, EVEN) (step 320) in correspondence with each other according to frequency signal, strange, the even drive signal of present embodiment also is the square wave in a high reference voltage and a low reference voltage alternate cycles, and cycle and frequency strange, even drive signal are identical, only has a phase differential between it, and the phase differential of present embodiment is 180 degree, and the voltage differences that high reference voltage strange, even drive signal reaches low reference voltage is about 5 volts.Then, scan drive cell 12 exports strange, even drive signal to voltage conversion unit 14 via A, B output terminal respectively, with by voltage conversion unit 14 with the processing of boosting of strange, even drive signal, so that strange, the high reference voltage of even drive signal and the voltage differences of low reference voltage are amplified in about 200 volts (step 330).Afterwards, strange, the even drive signal after voltage conversion unit 14 will boost is via the emitter 115 (step 340) of two leads input field emission panels 11.
Two groups of emitters 115 of present embodiment receive strange, even drive signal respectively, as: odd number row emitter 115 receives above-mentioned strange drive signal, and even numbers row emitter 115 receives above-mentioned even drive signal.Because phase difference strange, even drive signal, and make that odd number row emitter 115 is to have about 200 volts voltage differences with even numbers row emitter 115 on the same time point.When strange drive signal was high reference voltage for the low even drive signal of reference voltage, the voltage on the odd number row emitter 115 was high reference voltage for the voltage on low reference voltage and the even numbers row emitter 115.At this moment, produce between odd number row emitter 115 and the even numbers row emitter 115 strong electric field and and then make odd number row emitter 115 send a plurality of electronics, that is, odd number row emitter 115 is as electron source, even numbers is arranged emitter 115 as gate.Therefore and fluorescence excitation material 114 sends radiance the positive voltage that the electronics that odd number row emitter 115 sends is subjected to positive plate 111 attracts and the fluorescent material 114 of bombardment on it.Yet, at next time point, when strange drive signal for the even drive signal of high reference voltage during for low reference voltage, the voltage on the odd number row emitter 115 is that the voltage on high reference voltage and the even numbers row emitter 115 is low reference voltage.At this moment, even numbers row emitter 115 be subjected to its with odd number row emitter 115 between strong electric field attraction and send a plurality of electronics so that the fluorescent material of its bombardment 114 is luminous.
Therefore, the method for driving circuit of field emission backlight panel of present embodiment is exported one group of drive signal to field emission panel with phase difference and is alternately sent electronics with the emitter that drives field emission panel on different time points, thereby simplify to the logical process process of drive signal and the design of scan drive cell, so save cost and increase the luminous area of field emission panel, brightness and homogeneity.
Please refer to Fig. 5, it shows the field emission panel cut-open view of the present invention's second preferred embodiment.For exempting to give unnecessary details in detail, the difference place of a present embodiment and a last embodiment only is described in detail herein.As shown in FIG., more form a gate layer 116 on the emitter 115 on the minus plate 112 of the field emission panel 11 of present embodiment, whether it sends electronics with the emitter 115 of Control of Voltage under it, or rather, when the voltage of gate layer 116 is high voltage and when being work functions greater than emitter 115 with the voltage difference of emitter 115,115 of emitters send electronics, and all the other situations are next not to be sent, and so then whether may command fluorescent material 114 sends radiance.Again, the gate layer 116 of present embodiment and emitter 115 are all that odd number row electrically connects mutually, even numbers row electrically connects mutually and even numbers row arranges with odd number and do not electrically connect mutually.Yet odd number row's emitter 115 is the control that electrically connects and receive strange drive signal with even numbers row's gate layer 116, and even numbers row's emitter 115 is the control that electrically connects and receive even drive signal with odd number row's gate layer 116.Therefore, on a time point, gate layer 116 voltages of arranging when odd number are that high reference voltage and the emitter under it 115 are when hanging down reference voltage, and then odd number row emitter 115 sends electronics.On next time point, gate layer 116 voltages of arranging when even numbers are that high reference voltage and the emitter under it 115 are when hanging down reference voltage, then send electronics by even numbers row emitter 115.
By learning in above-mentioned, the present invention is to produce the plurality of drive signal according to a frequency signal, and behind the voltage of transition drive signal, drive signal is sent to field emission backlight panel, so that the plural number of field emission backlight panel row emitter alternately sends electronics, and light-emitting area, brightness and the homogeneity of increase field emission backlight panel, and can save manufacturing cost.
The foregoing description is only given an example for convenience of description, and the interest field that the present invention advocated should be as the criterion so that the protection domain of claim is described certainly, but not only limits to the foregoing description.
Claims (14)
1. a method for driving circuit of field emission backlight panel is applicable to a field emission backlight panel, forms a plurality of emitters on it, and this emitter is to be divided into plural groups, it is characterized in that, above-mentioned driving method comprises the following steps:
Produce a frequency signal;
Produce a plurality of drive signals according to this frequency signal; Wherein, the phase place difference of these a plurality of drive signals;
Change the voltage of this drive signal; And
To import this plural groups emitter backlight panel respectively through this drive signal of changing voltage, wherein this drive signal is the electric wave of voltage between a high reference voltage and a low reference voltage.
2. method for driving circuit of field emission backlight panel as claimed in claim 1 is characterized in that, wherein, the voltage of this drive signal is to be converted to raise.
3. method for driving circuit of field emission backlight panel as claimed in claim 2 is characterized in that, wherein, this drive signal be by a voltage conversion unit with changing voltage, this voltage conversion unit is to be electrically connected at this field emission backlight panel.
4. method for driving circuit of field emission backlight panel as claimed in claim 1 is characterized in that, wherein, this drive signal is two.
5. method for driving circuit of field emission backlight panel as claimed in claim 1 is characterized in that, wherein, the cycle of this drive signal is the integral multiple in the cycle of this frequency signal.
6. method for driving circuit of field emission backlight panel as claimed in claim 1 is characterized in that, wherein, the frequency or the cycle of these a plurality of drive signals are identical.
7. method for driving circuit of field emission backlight panel as claimed in claim 1 is characterized in that, wherein, this drive signal is to import this field emission backlight panel via the one scan driver element.
8. method for driving circuit of field emission backlight panel as claimed in claim 7 is characterized in that, wherein, this scan drive cell is to be electrically connected between a power-supply unit and this field emission backlight panel.
9. method for driving circuit of field emission backlight panel as claimed in claim 1 is characterized in that, wherein, this drive signal is the voltage of a plurality of emitters of this field emission backlight panel of control.
10. method for driving circuit of field emission backlight panel as claimed in claim 9 is characterized in that, wherein, same time point, the voltage of adjacent transmission body are different.
11. method for driving circuit of field emission backlight panel as claimed in claim 9 is characterized in that, wherein, this emitter is to use the potpourri of an electron source material and a conductive material to make.
12. method for driving circuit of field emission backlight panel as claimed in claim 9 is characterized in that, wherein, this emitter is a strip.
13. method for driving circuit of field emission backlight panel as claimed in claim 9 is characterized in that, wherein, when the voltage of controlling this emitter when this drive signal was a low-voltage, this emitter sent at least one electronics.
14. method for driving circuit of field emission backlight panel as claimed in claim 13 is characterized in that, wherein, the adjacent transmission body alternately sends this electronics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710098295A CN101303828B (en) | 2007-05-11 | 2007-05-11 | Method for driving circuit of field emission backlight panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710098295A CN101303828B (en) | 2007-05-11 | 2007-05-11 | Method for driving circuit of field emission backlight panel |
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| Publication Number | Publication Date |
|---|---|
| CN101303828A CN101303828A (en) | 2008-11-12 |
| CN101303828B true CN101303828B (en) | 2010-05-26 |
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| CN200710098295A Expired - Fee Related CN101303828B (en) | 2007-05-11 | 2007-05-11 | Method for driving circuit of field emission backlight panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102148118B (en) * | 2010-11-27 | 2013-05-01 | 福州大学 | Medium-free tripolar field emission display (FED) device having single-cathode and single-gate type transmission units and driving method thereof |
| TWI421831B (en) * | 2011-06-08 | 2014-01-01 | Au Optronics Corp | Field emission structure driving method and display apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002031803A1 (en) * | 2000-10-12 | 2002-04-18 | Candescent Technologies Corporation | Field emission display for interlaced and sequential video signals and related driving method |
| CN1637511A (en) * | 2004-01-08 | 2005-07-13 | 三星Sdi株式会社 | Field emission backlight unit, method of driving the backlight unit, and method of manufacturing lower panel |
| US7006171B1 (en) * | 1999-03-31 | 2006-02-28 | Sharp Kabushiki Kaisha | Light-control device and method of driving |
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2007
- 2007-05-11 CN CN200710098295A patent/CN101303828B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7006171B1 (en) * | 1999-03-31 | 2006-02-28 | Sharp Kabushiki Kaisha | Light-control device and method of driving |
| WO2002031803A1 (en) * | 2000-10-12 | 2002-04-18 | Candescent Technologies Corporation | Field emission display for interlaced and sequential video signals and related driving method |
| CN1637511A (en) * | 2004-01-08 | 2005-07-13 | 三星Sdi株式会社 | Field emission backlight unit, method of driving the backlight unit, and method of manufacturing lower panel |
| JP2005197263A (en) * | 2004-01-08 | 2005-07-21 | Samsung Sdi Co Ltd | Field emission type backlight unit, its driving method, and manufacturing method of lower panel |
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