CN102956190B - A kind of display driver control integration device - Google Patents
A kind of display driver control integration device Download PDFInfo
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Abstract
The present invention proposes a kind of display drive apparatus, comprise decoding unit and multiple buffer cell, wherein, the input of partial buffer unit is connected with the input of decoding unit, for receiving the signal of outside input and exporting, decoding unit and multiple buffer cell are integrated in same integrated circuit.The technical scheme that the present invention proposes, and can let out signal protection unit, overlapping electric current blanker unit, discharge current blanker unit electric unit etc. and be integrated in wherein.In addition, to the invention allows for signal protection unit, overlapping electric current blanker unit, discharge current blanker unit and to let out in electric unit one or more is integrated in code translator.The such scheme that the present invention proposes, selectivity is integrated by circuit function module, shortcomings such as have employed the cost that multiple individual devices causes is high, area large, processed complex, easily damage can be overcome, improve production efficiency and the reliability of LED display drive apparatus, reduce the cost of display system, optimize system performance.
Description
Technical field
The present invention relates to digital communicating field, specifically, the present invention relates to display drive control device.
Background technology
Have the many merits such as cheap, flexible configuration, reaction velocity are fast because LED shows class application product, therefore LED display class application product plays more and more important role in the middle of our daily life.Such as, LED shows that products application show in the route of bus, the large-scale screen that gives the correct time, the creen for displaying interest rate of bank, commercial advertisement shield etc.
The circuit block diagram of traditional LED display cell board as shown in Figure 1, mainly comprises: input interface at the corresponding levels, signal cascade driver element, decoding unit, row sweep driver element, LED display drive chip, output port at the corresponding levels, LED array.LED display cell board can also comprise signal protection unit, electric current blanker unit etc.Wherein, signal cascade driver element, decoding unit, detecting signal unit are all adopt independently chip to coordinate peripheral component to complete.This way, benefit is that dirigibility is good, but also brings the problems such as cost is high, area is large, signal integrity is poor, reaction velocity is slow, processed complex, easily damage because element is more.
Present dynamic LED display screen is substantially fixing to the requirement of above-mentioned module, so the circuit structure that above-mentioned multiple individual chips completes, along with the LED display market demand and technical development, its dirigibility is lost already.In prior art also have a kind of by above-mentioned all module integrations to the way in a chip.Said method can reduce costs, and area reduces.But its intrinsic problem is, row is swept that driver element is also integrated enters by the method.Row is swept driver element and is made up of PMOS switch pipe.In actual applications, the LED number that PMOS may drive reaches 64, and the maximum electric current of LED can reach 40mA, and the On current of such PMOS can reach 2.5A, and On current is larger.So the way adopting individual devices composition row to sweep driver element is: adopt special switching tube technique to make PMOS switch pipe, adopt the encapsulation that conducting resistance is little, thermal resistance value is little, heat dispersion is high, and one independently row sweep driver element only integrated 2 PMOS, such On current can reach 5A.In tradition LED display cell board, employing be individual devices, do not adopt the way of the integrated IC more than 2 PMOS yet.And in existing integrated approach, have employed the way that 16 PMOS are integrated, these PMOS, in extreme applications situation, will have the PMOS conducting of half, be 20A; If do not adopt similar way, can waste be caused again, improve cost.In addition, because LED display is to the particular/special requirement of display effect, multiple row display unit requires as far as possible symmetrical, and each PMOS corresponds to corresponding row display unit, so when adopting the system of individual devices, PMOS is evenly spread in each corresponding row display unit as far as possible.All PMOS are focused in a chip, the row display unit display consistency caused due to PMOS undue concentration can be caused poor.So multiple row is swept driver element be integrated into decoding, signal buffer unit, practicality is very poor.
As mentioned above, due in traditional LED display cell board, have employed multiple individual devices, there is the shortcomings such as element is more, cost is high, area is large, signal integrity is poor, reaction velocity is slow, processed complex, easily damage; In existing integrated approach; the integrated heating problem that causes that row sweeps driver element and serviceable life problem, signal protection circuit the disappearance integrity problem, the poor display effect that the ignorance of display smear problem is caused that cause, make the practicality of existing integrated approach poor.
Therefore, be necessary to propose corresponding technical scheme, improve the practicality of display system, elevator system performance.
Summary of the invention
Object of the present invention is intended at least solve one of above-mentioned technological deficiency, by selectivity, circuit function module is carried out integrated especially, improve production efficiency and the reliability of LED display drive apparatus, reduce the cost of display system, optimize system performance, improve practicality.
In order to achieve the above object, embodiments of the invention propose a kind of display drive apparatus on the one hand, comprise decoding unit and multiple buffer cell, wherein, the input of partial buffer unit is connected with the input of described decoding unit, for receiving the signal of outside input and exporting, described decoding unit and multiple buffer cell are integrated in same integrated circuit; Described integrated circuit also comprises overlapping electric current blanker unit, and the lowest order of described decoding unit input signal is connected with the input of described overlapping electric current blanker unit, and the output of described overlapping electric current blanker unit connects the Enable Pin of described decoding unit; Wherein, described decoding unit, specifically for detecting the change of described overlapping electric current blanker unit input, exports and closes, export overlapping to stagger by described overlapping electric current blanker unit.
The embodiment of the present invention also proposed a kind of display drive apparatus on the other hand, comprise decoding unit and signal protection unit, wherein, the input signal that described signal protection unit receives or the part input signal of decoding unit identical with the input signal of decoding unit, the output of described signal protection unit connects the Enable Pin of described decoding unit, for controlling the output of described decoding unit, described decoding unit and signal protection unit are integrated in same integrated circuit; Described integrated circuit also comprises overlapping electric current blanker unit, and the lowest order of described decoding unit input signal is connected with the input of described overlapping electric current blanker unit, and the output of described overlapping electric current blanker unit connects the Enable Pin of described decoding unit; Wherein, described decoding unit, specifically for detecting the change of described overlapping electric current blanker unit input, exports and closes, export overlapping to stagger by described overlapping electric current blanker unit.
The embodiment of the present invention also proposed a kind of display drive apparatus on the other hand, comprise decoding unit and overlapping electric current blanker unit, wherein, the input of described decoding unit lowest order is connected with the input of overlapping electric current blanker unit, the output of described overlapping electric current blanker unit connects the Enable Pin of described decoding unit, for controlling the output of described decoding unit, described decoding unit and overlapping electric current blanker unit are integrated in same integrated circuit; Wherein, described decoding unit, specifically for detecting the change of described overlapping electric current blanker unit input, exports and closes, export overlapping to stagger by described overlapping electric current blanker unit.
The embodiment of the present invention also proposed a kind of display drive apparatus on the other hand, comprise decoding unit, discharge current blanker unit and let out electric unit, wherein, the input of described decoding unit lowest order is connected with the input of discharge current blanker unit, the input of described decoding unit is connected with described input of letting out electric unit, the Enable Pin of electric unit is let out described in the output connection of described discharge current blanker unit, for letting out the output of electric unit described in controlling, described decoding unit, discharge current blanker unit and let out electric unit and be integrated in same integrated circuit.
The such scheme that the present invention proposes, by selectivity, circuit function module is carried out integrated, shortcomings such as have employed the cost that multiple individual devices causes is high, area large, processed complex, easily damage can be overcome, improve production efficiency and the reliability of LED display drive apparatus, reduce the cost of display system, optimize system performance.In addition, the such scheme that the present invention proposes, implementation is simple, efficient.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is LED screen cell board functional schematic in prior art;
Fig. 2 is embodiment of the present invention A schematic diagram;
Fig. 3 is code translator conversion combination schematic diagram;
Fig. 4 is embodiment of the present invention B schematic diagram;
Fig. 5 is embodiment of the present invention C schematic diagram;
Fig. 6 is that decoding exports overlapping schematic diagram;
Fig. 7 is embodiment of the present invention D schematic diagram;
Fig. 8 is that stray capacitance causes display smear schematic diagram;
Fig. 9 is embodiment of the present invention E schematic diagram;
Figure 10 is embodiment of the present invention F schematic diagram;
Figure 11 is 3-8 code translator schematic diagram;
Figure 12 is embodiment of the present invention G schematic diagram;
Figure 13 is embodiment of the present invention H schematic diagram;
Figure 14 is embodiment of the present invention I schematic diagram.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In order to realize the object of the present invention, the embodiment of the present invention proposes a kind of display drive apparatus, comprise decoding unit and multiple buffer cell, wherein, the input of partial buffer unit is connected with the input of described decoding unit, for receiving the signal of outside input and exporting, described decoding unit and multiple buffer cell are integrated in same integrated circuit.
Specifically, the invention provides a kind of integrated circuit (IC) apparatus for LED display, inside comprises multiple signal buffer unit, decoding unit, and the data input pin of decode CONTROL UNIT is without the need to being connected with the output terminal of data buffer unit.Embodiment as shown in Figure 2.
This embodiment comprises multiple impact damper as buffer cell, corresponding, has multiple input, multiple output; Impact damper inside comprises the signal input unit for signal shaping, comprises the signal transmission unit done for fast transport, comprises to increase export driving force and avoid overlapping signal output unit, and the number of impact damper is determined according to actual needs.
Also code translator is comprised in above-described embodiment.As embodiments of the invention, described code translator is 3-8 code translator.Be input as AIN, BIN, CIN, export as AOUT, BOUT, COUT, Y0 ~ Y7.Linkage unit wherein between AIN and AOUT, BIN and BOUT, CIN and COUT is impact damper, acts on the same with multiple impact dampers of implementation and above-mentioned buffer cell.The relation of AIN, BIN, CIN and Y0 ~ Y7, adopts truth table as follows:
| C | B | A | Y0 | Y1 | Y2 | Y3 | Y4 | Y5 | Y6 | Y7 |
| 0 | 0 | 0 | L | H | H | H | H | H | H | H |
| 0 | 0 | 1 | H | L | H | H | H | H | H | H |
| 0 | 1 | 0 | H | H | L | H | H | H | H | H |
| 0 | 1 | 1 | H | H | H | L | H | H | H | H |
| 1 | 0 | 0 | H | H | H | H | L | H | H | H |
| 1 | 0 | 1 | H | H | H | H | H | L | H | H |
| 1 | 1 | 0 | H | H | H | H | H | H | L | H |
| 1 | 1 | 1 | H | H | H | H | H | H | H | L |
Wherein: 0, L represents low level, 1, H represents high level, and output default state is H.
Certainly, in actual applications, code translator can adopt 2-4 code translator.In addition, 3-8 code translator, also can add 2 anti-phase enable EN, ENN at code translator, uses, as shown in Figure 3 as code translator expansion.This enable relation with exporting is as following table:
| EN | ENN | Export |
| 0 | 0 | H |
| 0 | 1 | H |
| 1 | 0 | H |
| 1 | 1 | Input effectively |
That is: A, B signal is added A, B end of two 2-4 code translators, C signal adds the ENN end of first 2-4 code translator, EN termination power voltage; C signal adds the EN end of second 2-4 code translator, ENN termination ground voltage.
As embodiments of the invention, said integrated circuit also comprises signal protection unit, and input signal or the part input signal of decoding unit identical with the input signal of decoding unit that signal protection unit receives, exports the Enable Pin of the described decoding unit of connection.Specifically, when the signal frequency of described outside input lower than predetermined threshold or fixed level time width higher than predetermined threshold time, described signal protection element output signal acts on the Enable Pin of described decoding unit, closes the output of described decoding unit.
Embodiment as shown in Figure 4.The input of signal protection unit is the input of code translator, exports for controlling the enable of code translator.If signal occurs abnormal, signal protection unit controls code translator cuts out all output; Also the output of all impact dampers can be closed.
In the present embodiment, using the input of the input AIN of code translator as signal protection unit, certainly, also can select BIN or CIN etc., also the input of code translator all can be protected.When the incoming frequency of AIN is lower than a certain setting value, just think this abnormal signal, and then code translator cuts out, otherwise allow code translator normally work.Certainly, also can add an enable port at signal protection unit, optionally in actual applications whether use this signal protection unit.
Invention further provides a kind of integrated circuit (IC) apparatus for LED display, on the basis of above-described embodiment, increase overlapping electric current blanker unit.Integrated circuit also comprises overlapping electric current blanker unit, and the lowest order of described decoding unit input signal is connected with the input of described overlapping electric current blanker unit, and the output of described overlapping electric current blanker unit connects the Enable Pin of described decoding unit.
Specifically, when rising edge or the negative edge arrival of the lowest order of described decoding unit input signal, described signal protection element output signal acts on the Enable Pin of described decoding unit, closes the output of described decoding unit.
Embodiment as shown in Figure 5.Using the input of the lowest order of code translator input AIN as overlapping electric current blanker unit, when each of AIN (rises or negative edge) after arrival, produce a pulse, this pulse will close the output (i.e. high level) of code translator.Certainly, also can add an enable port at overlapping electric current blanker unit, optionally in actual applications whether use this overlapping electric current blanking function.Also can external resistor or electric capacity, peripheral hardware control is carried out to the blanking time.
Overlapping electric current blanking is used for avoiding decoder output mouth in change, there is overlapping phenomenon, as shown in Figure 6.When the input of code translator changes, effective output port also changes accordingly.Overlapping electric current blanker unit detects each change of code translator lowest order input AIN, and code translator is exported temporary close.Can staggering like this, it is overlapping to export, and then it is secretly bright to avoid causing LED display to produce.
Present invention also offers a kind of integrated circuit (IC) apparatus for LED display, increase discharge current blanker unit and let out electric unit.Integrated circuit also comprises discharge current blanker unit and lets out electric unit, the lowest order of described decoding unit input signal is connected with the input of described discharge current blanker unit, the input of described decoding unit is connected with described input of letting out electric unit, and lets out the Enable Pin of electric unit described in the output of described discharge current blanker unit connection.
Embodiment as shown in Figure 7.Using the input of the lowest order of code translator input AIN as discharge current blanker unit, when each of AIN (rises or negative edge) after arrival, produce a pulse, this pulse is discharged allowing the effective output port letting out electric unit.The input of letting out electric unit is the input of code translator, and the output of discharge current blanker unit.AIN, BIN, CIN corresponding let out electrical travelling for selecting, and the output port of discharge current blanker unit is for controlling the time span of letting out electricity.Certainly, also can add an enable port at discharge current blanker unit, optionally in actual applications whether use this discharge current blanking function.Also can external resistor or electric capacity, peripheral hardware control is carried out to the blanking time.
Discharge current blanking function is used for avoiding being expert at when entering a new line in inswept journey, drives port, line and the stray capacitance of LED that is connected to store electric charge to let out electricity, the LED of adjacent lines is produced secretly bright, as shown in Figure 8 because row is swept.When lighting the 2nd row, the voltage of stray capacitance CR reaches supply voltage, is generally 5V in practical application; Then close the 2nd row, when lighting the 3rd row, because the spurious charge of CR affects, the lamp that the 2nd row the 2nd that should extinguish arranges creates secretly bright.Let out before electric control unit can light the 3rd row after closedown the 2nd row and the spurious charge of CR is released totally in certain hour.
Notice that signal protection function derivative on above-mentioned concrete practice processes, overlapping electric current blanking function, discharge current blanking function do not conflict each other; can take anyly to be used in combination in same integrated circuit (IC) apparatus, also can be simultaneously used in same integrated circuit (IC) apparatus.Therefore, integrated circuit also comprises signal protection unit and overlapping electric current blanker unit,
The input signal that described signal protection unit receives or the part input signal of decoding unit identical with the input signal of decoding unit, exports the Enable Pin of the described decoding unit of connection; The lowest order of described decoding unit input signal is connected with the input of described overlapping electric current blanker unit, and the output of described overlapping electric current blanker unit connects the Enable Pin of described decoding unit.Embodiment as shown in Figure 9.
The display drive apparatus of the above-mentioned proposition of the present invention, comprises decoding unit and multiple buffer cell, can by signal protection unit, overlapping electric current blanker unit, discharge current blanker unit and to let out in electric unit one or more is integrated in wherein.The such scheme that the present invention proposes, selectivity is integrated by circuit function module, shortcomings such as have employed the cost that multiple individual devices causes is high, area large, processed complex, easily damage can be overcome, improve production efficiency and the reliability of LED display drive apparatus, reduce the cost of display system, optimize system performance.
The invention allows for a kind of integrated circuit (IC) apparatus for LED display, on traditional code translator basis, increase signal protection unit.Embodiment as shown in Figure 10.
Specifically; comprise decoding unit and signal protection unit; wherein; the input signal that described signal protection unit receives or the part input signal of decoding unit identical with the input signal of decoding unit; the output of described signal protection unit connects the Enable Pin of described decoding unit; for controlling the output of described decoding unit, described decoding unit and signal protection unit are integrated in same integrated circuit.
In addition, described integrated circuit also comprises overlapping electric current blanker unit, and the lowest order of described decoding unit input signal is connected with the input of described overlapping electric current blanker unit, and the output of described overlapping electric current blanker unit connects the Enable Pin of described decoding unit; When rising edge or the negative edge arrival of the lowest order of described decoding unit input signal, described signal protection element output signal acts on the Enable Pin of described decoding unit, closes the output of described decoding unit.
In addition, described integrated circuit also comprises discharge current blanker unit and lets out electric unit, the lowest order of described decoding unit input signal is connected with the input of described discharge current blanker unit, the input of described decoding unit is connected with described input of letting out electric unit, and lets out the Enable Pin of electric unit described in the output of described discharge current blanker unit connection.
Specifically, the input signal that receives of described signal protection unit is identical with the input signal of decoding unit or the part input signal of decoding unit comprises:
The input of described signal protection unit is connected with the part input of described decoding unit, or the input of described signal protection unit is connected with whole inputs of described decoding unit.
Figure 11 is traditional 3-8 code translator schematic diagram, and universal models is 74HC138.Have 16 pins.Wherein VDD and GND is VDD-to-VSS respectively.AIN, BIN, CIN of the corresponding the present embodiment of A0 ~ A2.E1, E2, E3 are the enable of this code translator.Wherein work as E1, time E2, E3=001 (L, L, H), normal decoding; Otherwise close and export, closedown output state is H.
The input of signal protection unit is the input of code translator, exports for controlling the enable of code translator.If signal occurs abnormal, signal protection unit controls code translator cuts out all output.
In the above-described embodiments, using the input of the input AIN of code translator as signal protection unit, certainly, also can select BIN or CIN etc., also the input of code translator all can be protected.When the incoming frequency of AIN is lower than a certain setting value, or when fixed level time width is longer than a certain setting value, just think this abnormal signal, and then code translator cuts out, otherwise allow code translator normally work.Certainly, also can add an enable port at signal protection unit, optionally in actual applications whether use this signal protection unit.This enable port can share with the Enable Pin of traditional 74HC138 (for example E1, E2).
Invention further provides a kind of integrated circuit (IC) apparatus for LED display, on traditional code translator basis, increase overlapping electric current blanker unit.Embodiment as shown in figure 12.
Specifically, comprise decoding unit and overlapping electric current blanker unit, wherein, the input of described decoding unit lowest order is connected with the input of overlapping electric current blanker unit, the output of described overlapping electric current blanker unit connects the Enable Pin of described decoding unit, for controlling the output of described decoding unit, described decoding unit and overlapping electric current blanker unit are integrated in same integrated circuit.
In addition; described integrated circuit also comprises signal protection unit; wherein, the input signal that described signal protection unit receives or the part input signal of decoding unit identical with the input signal of decoding unit, the output of described signal protection unit connects the Enable Pin of described decoding unit.
In addition, described integrated circuit also comprises discharge current blanker unit and lets out electric unit, the lowest order of described decoding unit input signal is connected with the input of described discharge current blanker unit, the input of described decoding unit is connected with described input of letting out electric unit, and lets out the Enable Pin of electric unit described in the output of described discharge current blanker unit connection.
Using the input of the lowest order of code translator input AIN as overlapping electric current blanker unit, when each of AIN (rises or negative edge) after arrival, produce a pulse, this pulse will close the output (i.e. high level) of code translator.Certainly, also can add an enable port at overlapping electric current blanker unit, optionally in actual applications whether use this overlapping electric current blanking function.This enable port can share with the Enable Pin of 74HC138.Also can external resistor or electric capacity, peripheral hardware control is carried out to the blanking time.
Overlapping electric current blanking is used for avoiding decoder output mouth in change, there is overlapping phenomenon.As shown in Figure 6.When the input of code translator changes, effective output port also changes accordingly.This overlapping electric current blanker unit, detects each change of code translator lowest order input AIN, code translator is exported temporary close.Can staggering like this, it is overlapping to export, and then it is secretly bright to avoid causing LED display to produce.
Present invention also offers a kind of integrated circuit (IC) apparatus for LED display, on traditional code translator basis, increase discharge current blanker unit and let out electric unit.Embodiment as shown in figure 13.
Specifically, comprise decoding unit, discharge current blanker unit and let out electric unit, wherein, the input of described decoding unit lowest order is connected with the input of discharge current blanker unit, the input of described decoding unit is connected with described input of letting out electric unit, the Enable Pin of electric unit is let out described in the output of described discharge current blanker unit connects, for letting out the output of electric unit described in controlling, described decoding unit, discharge current blanker unit and let out electric unit and be integrated in same integrated circuit.
In addition; described integrated circuit also comprises signal protection unit; wherein, the input signal that described signal protection unit receives or the part input signal of decoding unit identical with the input signal of decoding unit, the output of described signal protection unit connects the Enable Pin of described decoding unit.
In addition, described integrated circuit also comprises overlapping electric current blanker unit, and wherein, the input of described decoding unit lowest order is connected with the input of overlapping electric current blanker unit, the output of described overlapping electric current blanker unit connects the Enable Pin of described decoding unit, for controlling the output of described decoding unit.
Using the input of the lowest order of code translator input AIN as discharge current blanker unit, when each of AIN (rises or negative edge) after arrival, produce a pulse, this pulse is discharged allowing the effective output port letting out electric unit.The input of letting out electric unit is the input of code translator, and the output of discharge current blanker unit.AIN, BIN, CIN corresponding let out electrical travelling for selecting, and the output port of discharge current blanker unit is for controlling the time span of letting out electricity.Certainly, also can add an enable port at discharge current blanker unit, optionally in actual applications whether use this discharge current blanking function.Also can external resistor or electric capacity, peripheral hardware control is carried out to the blanking time.
Discharge current blanking function is used for avoiding being expert at when entering a new line in inswept journey, drives port, line and the stray capacitance of LED that is connected to store electric charge to let out electricity, the LED of adjacent lines is produced secretly bright because row is swept.As shown in Figure 8.When lighting the 2nd row, the voltage of stray capacitance CR reaches supply voltage, is generally 5V in practical application; Then close the 2nd row, when lighting the 3rd row, because the spurious charge of CR affects, the lamp that the 2nd row the 2nd that should extinguish arranges creates secretly bright.Originally let out before electric control unit can light the 3rd row after closedown the 2nd row and the spurious charge of CR is released totally in certain hour.
Notice the signal protection function in above-described embodiment, overlapping electric current blanking function and discharge current blanking function; do not conflict each other; can take anyly to be used in combination in same integrated circuit (IC) apparatus; also can be simultaneously used in same integrated circuit (IC) apparatus; as shown in figure 14, also belong within protection scope of the present invention.
The such scheme that the present invention proposes, proposes signal protection unit, overlapping electric current blanker unit, discharge current blanker unit and to let out in electric unit one or more is integrated in code translator.Such scheme selectivity is integrated by circuit function module, can overcome that to have employed the cost that multiple individual devices causes high, area is large, processed complex, the shortcomings such as easy damage, also can solve in existing integrated approach, the integrated heating problem that causes that the row existed sweeps driver element and serviceable life problem, the integrity problem that the disappearance of signal protection circuit is caused and being also resolved very well to the problem of poor display effect that the ignorance of display smear problem causes, improve production efficiency and the reliability of LED display drive apparatus, reduce the cost of display system, optimize system performance.
Compared with prior art, the invention provides the method and apparatus of the problems existed in the multiple individual devices solving the employing of existing LED unit plate and existing integrated approach.By the realization of this method, the number of chips of each LED display unit plate is significantly reduced, more convenient processing simultaneously, enhances reliability, reduces production, maintenance cost.
One of ordinary skill in the art will appreciate that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.
The above is only embodiments of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (11)
1. a display drive apparatus, it is characterized in that, comprise decoding unit and multiple buffer cell, wherein, the input of partial buffer unit is connected with the input of described decoding unit, for receiving the signal of outside input and exporting, described decoding unit and multiple buffer cell are integrated in same integrated circuit;
Described integrated circuit also comprises overlapping electric current blanker unit, and the lowest order of described decoding unit input signal is connected with the input of described overlapping electric current blanker unit, and the output of described overlapping electric current blanker unit connects the Enable Pin of described decoding unit; Wherein, described decoding unit, specifically for detecting the change of described overlapping electric current blanker unit input, exports and closes, export overlapping to stagger by described overlapping electric current blanker unit.
2. display drive apparatus as claimed in claim 1, it is characterized in that, described integrated circuit also comprises signal protection unit, the input signal that described signal protection unit receives or the part input signal of decoding unit identical with the input signal of decoding unit, exports the Enable Pin of the described decoding unit of connection; When the signal frequency of described outside input lower than predetermined threshold or fixed level time width higher than predetermined threshold time, described signal protection element output signal acts on the Enable Pin of described decoding unit, closes the output of described decoding unit.
3. display drive apparatus as claimed in claim 2; it is characterized in that; when rising edge or the negative edge arrival of the lowest order of described decoding unit input signal, described signal protection element output signal acts on the Enable Pin of described decoding unit, closes the output of described decoding unit.
4. display drive apparatus as claimed in claim 3, it is characterized in that, described integrated circuit also comprises discharge current blanker unit and lets out electric unit, the lowest order of described decoding unit input signal is connected with the input of described discharge current blanker unit, the input of described decoding unit is connected with described input of letting out electric unit, and lets out the Enable Pin of electric unit described in the output of described discharge current blanker unit connection.
5. the display drive apparatus as described in one of as any in claim 1 or 2, it is characterized in that, described integrated circuit also comprises discharge current blanker unit and lets out electric unit, the lowest order of described decoding unit input signal is connected with the input of described discharge current blanker unit, the input of described decoding unit is connected with described input of letting out electric unit, and lets out the Enable Pin of electric unit described in the output of described discharge current blanker unit connection.
6. a display drive apparatus, it is characterized in that, comprise decoding unit and signal protection unit, wherein, the input signal that described signal protection unit receives or the part input signal of decoding unit identical with the input signal of decoding unit, the output of described signal protection unit connects the Enable Pin of described decoding unit, and for controlling the output of described decoding unit, described decoding unit and signal protection unit are integrated in same integrated circuit;
Described integrated circuit also comprises overlapping electric current blanker unit, and the lowest order of described decoding unit input signal is connected with the input of described overlapping electric current blanker unit, and the output of described overlapping electric current blanker unit connects the Enable Pin of described decoding unit; Wherein, described decoding unit, specifically for detecting the change of described overlapping electric current blanker unit input, exports and closes, export overlapping to stagger by described overlapping electric current blanker unit.
7. display drive apparatus as claimed in claim 6; it is characterized in that; when rising edge or the negative edge arrival of the lowest order of described decoding unit input signal, described signal protection element output signal acts on the Enable Pin of described decoding unit, closes the output of described decoding unit.
8. the display drive apparatus as described in one of as any in claim 6 or 7, it is characterized in that, described integrated circuit also comprises discharge current blanker unit and lets out electric unit, the lowest order of described decoding unit input signal is connected with the input of described discharge current blanker unit, the input of described decoding unit is connected with described input of letting out electric unit, and lets out the Enable Pin of electric unit described in the output of described discharge current blanker unit connection.
9. a display drive apparatus, it is characterized in that, comprise decoding unit and overlapping electric current blanker unit, wherein, the input of described decoding unit lowest order is connected with the input of overlapping electric current blanker unit, the output of described overlapping electric current blanker unit connects the Enable Pin of described decoding unit, and for controlling the output of described decoding unit, described decoding unit and overlapping electric current blanker unit are integrated in same integrated circuit; Wherein, described decoding unit, specifically for detecting the change of described overlapping electric current blanker unit input, exports and closes, export overlapping to stagger by described overlapping electric current blanker unit.
10. a display drive apparatus, it is characterized in that, comprise decoding unit, discharge current blanker unit and let out electric unit, wherein, the input of described decoding unit lowest order is connected with the input of discharge current blanker unit, the input of described decoding unit is connected with described input of letting out electric unit, the Enable Pin of electric unit is let out described in the output connection of described discharge current blanker unit, for letting out the output of electric unit described in controlling, described decoding unit, discharge current blanker unit and let out electric unit and be integrated in same integrated circuit.
11. display drive apparatus as claimed in claim 10; it is characterized in that; described integrated circuit also comprises signal protection unit; wherein; the input signal that described signal protection unit receives or the part input signal of decoding unit identical with the input signal of decoding unit, the output of described signal protection unit connects the Enable Pin of described decoding unit.
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| CN103745689B (en) * | 2014-01-07 | 2016-08-31 | 深圳市明微电子股份有限公司 | A kind of driving chip of dynamic screen |
| CN105161053B (en) * | 2015-09-11 | 2017-08-11 | 深圳市明微电子股份有限公司 | A kind of anti-smear row sweeps control chip and anti-smear LED display circuit |
| CN107358912A (en) * | 2017-08-18 | 2017-11-17 | 深圳市德普微电子有限公司 | A kind of single dual-colored LED display screen drive chip |
| CN109427286B (en) * | 2017-08-25 | 2020-06-23 | 西安诺瓦星云科技股份有限公司 | Display screen display control method, scanning card and display screen system |
| CN109559677A (en) * | 2018-12-20 | 2019-04-02 | 深圳市羽微电子有限公司 | A kind of LED display driver IC |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201207737Y (en) * | 2007-12-21 | 2009-03-11 | 康佳集团股份有限公司 | LED driving board |
| CN101388174A (en) * | 2008-10-24 | 2009-03-18 | 江苏稳润光电有限公司 | Protection circuit for LED display screen unit panel |
| CN201323045Y (en) * | 2008-12-02 | 2009-10-07 | 常州电子研究所有限公司 | Full color LED drive unit circuit board |
| CN201562437U (en) * | 2009-08-04 | 2010-08-25 | 深圳市天微电子有限公司 | Integrated driving device used for LED advertisement display screen |
| CN202230716U (en) * | 2011-08-31 | 2012-05-23 | 深圳市明微电子股份有限公司 | Display driving device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080055227A1 (en) * | 2006-08-30 | 2008-03-06 | Ati Technologies Inc. | Reduced component display driver and method |
| WO2011015141A1 (en) * | 2009-08-04 | 2011-02-10 | 深圳市天微电子有限公司 | Integrated circuit for driving led advertisement display screen |
-
2011
- 2011-08-31 CN CN201110254499.5A patent/CN102956190B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201207737Y (en) * | 2007-12-21 | 2009-03-11 | 康佳集团股份有限公司 | LED driving board |
| CN101388174A (en) * | 2008-10-24 | 2009-03-18 | 江苏稳润光电有限公司 | Protection circuit for LED display screen unit panel |
| CN201323045Y (en) * | 2008-12-02 | 2009-10-07 | 常州电子研究所有限公司 | Full color LED drive unit circuit board |
| CN201562437U (en) * | 2009-08-04 | 2010-08-25 | 深圳市天微电子有限公司 | Integrated driving device used for LED advertisement display screen |
| CN202230716U (en) * | 2011-08-31 | 2012-05-23 | 深圳市明微电子股份有限公司 | Display driving device |
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