CN102298910A - LCD screen driving circuit capable of displaying electric quantity, and battery charger - Google Patents
LCD screen driving circuit capable of displaying electric quantity, and battery charger Download PDFInfo
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- CN102298910A CN102298910A CN2010102105885A CN201010210588A CN102298910A CN 102298910 A CN102298910 A CN 102298910A CN 2010102105885 A CN2010102105885 A CN 2010102105885A CN 201010210588 A CN201010210588 A CN 201010210588A CN 102298910 A CN102298910 A CN 102298910A
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Abstract
The invention relates to an LCD (Liquid Crystal Display) screen driving circuit capable of displaying electric quantity, comprising a driving unit for outputting a power signal to drive an LCD screen, and further comprising a frequency dividing control unit. The frequency dividing control unit further comprises a frequency dividing circuit, a shielding circuit and a follower circuit, wherein the frequency dividing circuit is used for dividing a reference square wave signal into a plurality of paths of square wave pulse signals with same frequency, the follower circuit is used for outputting the divided square pulse signals in a following manner, and the shielding circuit is used for correspondingly shielding each path of divided square wave pulse signals according to an input electric quantity signal. The invention further relates to a battery charger comprising a reference circuit unit, a battery electric quantity detection unit, a comparator unit and the LCD screen driving circuit. With the LCD screen driving circuit and the battery charger, the battery electric quantity, the progress of charging and the battery full-charged state are displayed through a 4-bit columnar display LCD screen, so that a function of providing battery information is realized, cost is saved, and the battery charger is more convenient and humanized for users.
Description
Technical field
The present invention relates to a kind of LCD screen driving circuit and battery charger that can show electric weight.
Background technology
During present battery charger is used, commonplace Presentation Function be by the LED lamp bright, dark, whether flicker is represented to charge and whether battery fills full.But along with the higher level requirement for application with the user that improves constantly of technology, present scheme can't satisfy user's demand.
Occurred minority recently and shown that with the LCD screen charging process and battery fill full method, adopt 4 column LCD screens as shown in fig. 1 to realize showing, drive LCD in this class scheme and can only show two states, first kind is to charge, four black post bar1 above the LCD screen, bar2, bar3, bar4 roll display.Second kind is that battery fills bar1 when satisfying, bar2, bar3, bar4 Chang Liang.This scheme has 2 deficiencies.The first, show singlely, when only connecing battery, can not demonstrate the electric weight of battery, in charging process, can not show the charging progress.The second, detect battery and fill precision deficiency when satisfying, because current programme adopts Design of Digital System more, therefore can only adopt the method for counting to judge, promptly set a time, it is full that the time of arrive setting when the time just thinks that battery has filled, rather than directly detect battery electric quantity.Therefore can not reach high-precision requirement, for different batteries, also can the property of there are differences problem.
In addition, the mode of traditional driving LCD as shown in Figure 2, it is anode plus signal at LCD, the negative terminal of LCD is received logically, when the LCD needs are bright, the square-wave pulse signal of one 50% dutycycle of LCD+ input, when LCD need show low level signal of LCD+ input when extinguishing, LCD is extinguished, so LCD only brightens at 50% positive half period, so brightness is darker.
Summary of the invention
The present invention has overcome above-mentioned shortcoming, provides a kind of display effect abundant, the LCD screen driving circuit and the battery charger that can show electric weight that display precision is high.
The present invention solves the technical scheme that its technical matters takes: a kind of LCD screen driving circuit that can show electric weight, comprise the driver element that is used to export the power signal that drives the LCD screen, also comprise the frequency division control module, described frequency division control module further comprises frequency dividing circuit, screened circuit and follow circuit, described frequency dividing circuit is used for the reference square wave signal, the square-wave pulse signal that is divided into the multichannel same frequency, described follow circuit is used for the square-wave pulse signal behind the frequency division is followed output, described screened circuit is used for according to input electric quantity signal, the square-wave pulse signal behind corresponding each road frequency division of shielding.
Described driver element adopts bilateral driver element, when needs LCD brightens, adds antiperiodic pulse signal at the positive and negative two ends of LCD; When LCD need be shown as when extinguishing, add synperiodic pulse signal at the LCD two ends.
A kind of battery charger, comprise the reference circuit unit, the battery electric quantity detecting unit, comparator unit and LCD screen driving circuit, described LCD screen driving circuit comprises the driver element that is used to export the power signal that drives the LCD screen, also comprise the frequency division control module, described frequency division control module further comprises frequency dividing circuit, screened circuit and follow circuit, described frequency dividing circuit is used for the reference square wave signal, the square-wave pulse signal that is divided into the multichannel same frequency, described follow circuit is used for the square-wave pulse signal behind the frequency division followed exports to described driver element, described screened circuit is used for the signal according to described comparator unit output, the square-wave pulse signal behind corresponding each road frequency division of shielding.
The mode that the present invention adopts digital-to-analogue to mix; show that by 4 columns the LCD screen shows that battery electric quantity and charging progress and battery fill full state; not only reach the function that battery information is provided but also be the simplest method of most convenient; simultaneously also save cost, made user's hommization more more convenient to use.When only connecing battery, can segmentation show battery electric quantity, in charging process, in battery charger, can show the battery charge progress in addition.
Description of drawings
Fig. 1 is that 4 column LCD screens show synoptic diagram;
Fig. 2 is a LCD type of drive synoptic diagram in the prior art;
Fig. 3 shields the schematic diagram of driving circuit for the LCD that can show electric weight among the present invention;
Fig. 4 is the theory diagram of battery charger among the present invention;
Fig. 5 is the circuit theory diagrams of frequency division control module among the present invention;
Fig. 6 is for adopting the frequency division synoptic diagram of circuit among Fig. 5
Fig. 7 is the circuit theory diagrams of bilateral driver element among the present invention;
Fig. 8 is for adopting the LCD type of drive synoptic diagram of circuit among Fig. 7.
Embodiment
As shown in Figure 3, the LCD screen driving circuit that can show electric weight among the present invention comprises continuous frequency division control module I1 and bilateral driver element I2.
As shown in Figure 4, the theory diagram for battery charger among the present invention comprises:
Charging judging unit 401 is used to detect battery and whether is in charged state;
Whether battery connection judgment unit 402 is used to detect battery and normally connects;
Battery electric quantity detecting unit 404 is used to detect the current electric weight of battery;
Frequency division control module 406 is used for the signal with the comparator unit conveying, is converted into and drives the needed logical signal of LCD, comprises that LCD extinguishes, Chang Liang, signals such as flicker;
Contents such as other power conversion units same as the prior art in the described battery charger, charging control unit repeat no more here.
As shown in Figure 5, described frequency division control module is modulated natural frequency according to logic according to battery electric quantity signal c1, c2, c3 that described comparing unit 405 provides, and output signal b1, b2, b3, b4 give described bilateral driver element.
Described frequency division control module further comprises frequency dividing circuit, screened circuit and follow circuit, described frequency dividing circuit is made of d type flip flop I17, I26, I27, I28, I29 and Sheffer stroke gate I95, I99, rejection gate I106, I107, phase inverter I36, I83, I84, by the reference square wave signal of this loop with the CLK input, the square-wave pulse that is divided into the multichannel same frequency, the figure behind the frequency division as shown in Figure 6.The square-wave pulse signal of described follow circuit after with frequency division followed output, receives reset signal from the Q termination of I17, and each circulation is carried out zero clearing to d type flip flop I108, I109, I111, I110, transmits next round-robin a, b, c, d signal again.Therefore b1, b2, b3, b4 can follow and transmit the signal of a, b, c, d.Described screened circuit shields square-wave pulse signal behind each road frequency division according to input signal, signal c1, c2, the c3 of input is the electric energy control signal of comparator unit output, when c1 when being high the frequency division control module think that battery electric quantity has reached 1/4, need be with bar1 Chang Liang.The function of this moment realizes that by I105, I78, I77, I97, I98, I96 at first high level signal of C1 input makes circuit that I29 is shielded, and the signal ss of the input end D of I29 is delivered directly to the input signal D of I28.Simultaneously C1 also makes the input signal ab of I105 lose efficacy, and makes the output signal of I95 only be decided by the output signal of I75.Make to have only I28, I27, I26 and I17 to work in the loop by a series of computing, reach the bar1 Chang Liang that makes LCD, other three lamps continue round-robin effects.As C2, when C3 is respectively high level, in like manner analogize.
According to said structure, realized utilizing by the extinguishing of each lamp in the Digital Signals column screen of reflection information about power, Chang Liang, flicker changing, when only connecing battery, can segmentation show battery electric quantity, in charging process, can show the battery charge progress.When battery electric quantity was very low, four demonstrations among the LCD were according to bar1, bar2, bar3, the bar4 roll display is represented charging, when battery is filled to 1/4 electric weight, bar1 Chang Liang, bar2, bar3, the bar4 roll display, with being charged at 1/2 o'clock by electric weight, bar1, bar2 Chang Liang, and bar3, bar4 continues roll display.Bar1 after battery all is full of, bar2, bar3, the equal Chang Liang of bar4.Above-mentioned functions of the present invention can make things convenient for the user to see simultaneously in charging the charging progress of battery to have broken through the bottleneck that can not show the charging progress in the traditional scheme.
And, the present invention is also integrated frequency modulation function, promptly when showing the charging progress, when four bar posts glimmer simultaneously, each bar post is bright once to be 1/4 of the whole cycle secretly, when a bar post stops to glimmer, to also adjusting frequency at other posts of flicker, after stopping flicker as bar1, every bright 1/3 of whole cycle that secretly once becomes of bar2, bar3, bar4.When only surplus next bar4 glimmered, bright secretly once was 1 cycle, more comfortable in the time of can making the user check the charging progress like this.
Be illustrated in figure 7 as the circuit theory diagrams of bilateral driver element among the present invention, according to signal b1, b2, b3, the b4 of described frequency division control module, output signal LFplus, LFminus, LS1, LS2, LS3, LS4 are to the positive and negative two ends of LCD.All of LCD are just terminating on the LFplus end, and the housing negative terminal is received on the LFminus end, and the input of LFplus and LFminus all is an OSC end as shown in the figure, but therefore the phase inverter difference that connects separately exports opposite square-wave signal, make LCD housing Chang Liang.And other four columns show the input of bar1, bar2, bar3, bar4 have respectively electric energy control signal B1, B2, B3, B4 (being b1, b2, b3, the b4 of the output of frequency division control module) control when need its normal when bright output signal LS1, LS2, LS3, LS4 export with the opposite signal of LFplus, then according to the control of B1, B2, B3, B4, glimmer when glimmering if desired according to loop cycle.Adopt this bilateral type of drive, when needs LCD brightens, as shown in Figure 8, add antiperiodic pulse signal at the positive and negative two ends of LCD and make the brightness of LCD double, make when the application of low-voltage, can allow the user see the state of LCD clearly clearly than traditional approach; When LCD need be shown as when extinguishing, will add synperiodic pulse signal at the LCD two ends, make LCD extinguish.
With the battery of mobile phone is example, supposes to be shown as more than the 4V full.When charger only connects battery, for showing the duty of battery electric quantity, by the comparator unit of inside, the cell voltage of gathering is compared with inner reference voltage, draw a digital signal that can reflect current battery electric quantity, when cell voltage during less than 3.7V, four lattice go out entirely; When cell voltage reaches 3.7V, be shown as lattice; When reaching 3.8V, battery is shown as two lattice; When cell voltage reaches 3.9V, be shown as three lattice; When reaching 4.0V, battery is shown as four lattice.
When charger is in charged state following time, described charging judging unit is controlled described frequency division control module and is obtained the reference square wave signal, when cell voltage during less than 3.7V, and four lattice roll display.When cell voltage reaches 3.7V, be shown as normal bright other the three lattice roll display of lattice.When cell voltage reaches 3.8V, be shown as normal bright other the two lattice roll display of two lattice.When cell voltage reaches 3.9V, be shown as normal bright other lattice flickers of three lattice and show.When cell voltage reaches 4.2V battery full charging pressure, all four lattice Chang Liang.
More than the LCD screen driving circuit and the battery charger that can show electric weight provided by the present invention is described in detail, used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (4)
1. the LCD that can show electric weight shields driving circuit, comprise the driver element that is used to export the power signal that drives the LCD screen, it is characterized in that: also comprise the frequency division control module, described frequency division control module further comprises frequency dividing circuit, screened circuit and follow circuit, described frequency dividing circuit is used for the reference square wave signal is divided into the square-wave pulse signal of multichannel same frequency, described follow circuit is used for the square-wave pulse signal behind the frequency division is followed output, described screened circuit is used for according to input electric quantity signal, the square-wave pulse signal behind corresponding each road frequency division of shielding.
2. the LCD screen driving circuit that can show electric weight according to claim 1, it is characterized in that: described driver element adopts bilateral driver element, when needs LCD brightens, adds antiperiodic pulse signal at the positive and negative two ends of LCD; When LCD need be shown as when extinguishing, add synperiodic pulse signal at the LCD two ends.
3. battery charger, comprise the reference circuit unit, the battery electric quantity detecting unit, comparator unit and LCD screen driving circuit, described LCD screen driving circuit comprises the driver element that is used to export the power signal that drives the LCD screen, it is characterized in that: also comprise the frequency division control module, described frequency division control module further comprises frequency dividing circuit, screened circuit and follow circuit, described frequency dividing circuit is used for the reference square wave signal, the square-wave pulse signal that is divided into the multichannel same frequency, described follow circuit is used for the square-wave pulse signal behind the frequency division followed exports to described driver element, described screened circuit is used for the signal according to described comparator unit output, the square-wave pulse signal behind corresponding each road frequency division of shielding.
4. battery charger according to claim 3 is characterized in that: described driver element adopts bilateral driver element, when needs LCD brightens, adds antiperiodic pulse signal at the positive and negative two ends of LCD; When LCD need be shown as when extinguishing, add synperiodic pulse signal at the LCD two ends.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102105885A CN102298910A (en) | 2010-06-28 | 2010-06-28 | LCD screen driving circuit capable of displaying electric quantity, and battery charger |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102105885A CN102298910A (en) | 2010-06-28 | 2010-06-28 | LCD screen driving circuit capable of displaying electric quantity, and battery charger |
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| CN102298910A true CN102298910A (en) | 2011-12-28 |
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| CN2010102105885A Pending CN102298910A (en) | 2010-06-28 | 2010-06-28 | LCD screen driving circuit capable of displaying electric quantity, and battery charger |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570710A (en) * | 2015-02-09 | 2015-04-29 | 广东交通职业技术学院 | Electronic sand clock |
| CN107430460A (en) * | 2015-04-09 | 2017-12-01 | 三星电子株式会社 | Digital pen, touch system and its method that information is provided |
| CN115473294A (en) * | 2021-10-25 | 2022-12-13 | 成都信息工程大学 | Ultra-low voltage starting emergency lighting source |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87103529A (en) * | 1986-05-15 | 1987-11-25 | 菲利浦光灯制造公司 | Device for indicating charge status of battery |
| CN1173053A (en) * | 1996-08-02 | 1998-02-11 | 三星电管株式会社 | Remaining battery capacity display device |
| CN1228540A (en) * | 1997-12-26 | 1999-09-15 | 三星电子株式会社 | Device and method for accurately measuring battery remaining capacity |
| CN1293371A (en) * | 1999-10-18 | 2001-05-02 | 福基科技股份有限公司 | Battery charge and discharge state display device for portable electronic products |
| CN1996701A (en) * | 2006-01-05 | 2007-07-11 | 苏州宇达电通有限公司 | Battery charging management system and method |
| CN101119032A (en) * | 2006-08-04 | 2008-02-06 | 英华达(上海)电子有限公司 | Charging guage device and indicating method for mobile equipment |
| US20090309548A1 (en) * | 2008-06-16 | 2009-12-17 | Steve Carkner | Graphic State of Charge Indicator for a Battery Charging System and Method of Use |
| CN201829171U (en) * | 2010-06-28 | 2011-05-11 | 北京思旺电子技术有限公司 | Liquid crystal display (LCD) screen drive circuit capable of displaying capacity and battery charger |
-
2010
- 2010-06-28 CN CN2010102105885A patent/CN102298910A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87103529A (en) * | 1986-05-15 | 1987-11-25 | 菲利浦光灯制造公司 | Device for indicating charge status of battery |
| CN1173053A (en) * | 1996-08-02 | 1998-02-11 | 三星电管株式会社 | Remaining battery capacity display device |
| CN1228540A (en) * | 1997-12-26 | 1999-09-15 | 三星电子株式会社 | Device and method for accurately measuring battery remaining capacity |
| CN1293371A (en) * | 1999-10-18 | 2001-05-02 | 福基科技股份有限公司 | Battery charge and discharge state display device for portable electronic products |
| CN1996701A (en) * | 2006-01-05 | 2007-07-11 | 苏州宇达电通有限公司 | Battery charging management system and method |
| CN101119032A (en) * | 2006-08-04 | 2008-02-06 | 英华达(上海)电子有限公司 | Charging guage device and indicating method for mobile equipment |
| US20090309548A1 (en) * | 2008-06-16 | 2009-12-17 | Steve Carkner | Graphic State of Charge Indicator for a Battery Charging System and Method of Use |
| CN201829171U (en) * | 2010-06-28 | 2011-05-11 | 北京思旺电子技术有限公司 | Liquid crystal display (LCD) screen drive circuit capable of displaying capacity and battery charger |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570710A (en) * | 2015-02-09 | 2015-04-29 | 广东交通职业技术学院 | Electronic sand clock |
| CN107430460A (en) * | 2015-04-09 | 2017-12-01 | 三星电子株式会社 | Digital pen, touch system and its method that information is provided |
| CN115473294A (en) * | 2021-10-25 | 2022-12-13 | 成都信息工程大学 | Ultra-low voltage starting emergency lighting source |
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Application publication date: 20111228 |