CN202230716U - Display driving device - Google Patents
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- CN202230716U CN202230716U CN2011203233518U CN201120323351U CN202230716U CN 202230716 U CN202230716 U CN 202230716U CN 2011203233518 U CN2011203233518 U CN 2011203233518U CN 201120323351 U CN201120323351 U CN 201120323351U CN 202230716 U CN202230716 U CN 202230716U
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Abstract
The utility model discloses a display driving device, which comprises a decoding unit and a plurality of buffer units, wherein input ends of partial buffer units are connected with the input end of the decoding unit and used for receiving and outputting signals input from the outside, and the decoding unit and the plurality of buffer units are integrated in a same integrated circuit. Through the technical scheme of the display driving device, a signal protection unit, an overlapping current blanking unit, a discharging current blanking unit, a discharging unit and the like are integrated in the display driving device. In addition, in the display driving device, one or a plurality of the signal protection unit, the overlapping current blanking unit, the discharging current blanking unit and the discharging unit is/are integrated in a decoder. Through the scheme, a circuit function module is selectively integrated, defects of high cost, large area, complexity in processing, easiness in damage and the like caused by adoption of a plurality of independent parts can be overcome, production efficiency and reliability of the light-emitting diode (LED) display driving device are improved, cost of a display system is reduced, and system performance is optimized.
Description
Technical field
The utility model relates to digital communicating field, and particularly, the utility model relates to display drive control device.
Background technology
Because LED shows a type application product and have numerous advantages such as cheap, flexible configuration, reaction velocity be fast, so LED shows that a type application product playing the part of more and more important role in the middle of our daily life.For example, LED shows that product is applied to the route demonstration of bus, the large-scale screen that gives the correct time, the interest rate display screen of bank, commercial advertisement shielded or the like.
The circuit block diagram of traditional LED display cell board is as shown in Figure 1, mainly comprises: input interface at the corresponding levels, signal cascade driver element, decoding unit, row are swept driver element, LED display driver chip, output port at the corresponding levels, LED lamp array.The LED display cell board can also comprise signal protection unit, electric current blanking unit etc.Wherein, signal cascade driver element, decoding unit, detecting signal unit all are to adopt independently chip cooperation peripheral component completion.This way, benefit are that dirigibility is good, but because the more problems such as cost is high, area is big, signal integrity is poor, reaction velocity is slow, processed complex, easy damage of also having brought of element.
Present dynamic LED display screen is to the basic fixed that requires of above-mentioned module, so the circuit structure that above-mentioned a plurality of individual chips is accomplished, along with the LED display market demand and technical development, its dirigibility is lost already.Also have in the prior art and a kind of above-mentioned all modules are integrated into a way in the chip.Such scheme can reduce cost, and area dwindles.But its intrinsic problem is, this scheme is swept row that driver element is also integrated enters.Row is swept driver element and is made up of the PMOS switching tube.In practical application, a PMOS manages the LED lamp number that possibly drive and reaches 64, and the maximum electric current of LED lamp can reach 40mA, and the conducting electric current of such PMOS pipe can reach 2.5A, and the conducting electric current is bigger.So the way that adopts individual devices composition row to sweep driver element is: adopt special switching tube technology to make the PMOS switching tube; Adopt the encapsulation that conducting resistance is little, thermal resistance value is little, heat dispersion is high; And independently go for one and sweep only integrated 2 PMOS pipe of driver element, the conducting electric current can reach 5A like this.In the tradition LED display cell board, employing be individual devices, do not adopt the way of integrated IC more than 2 PMOS pipes yet.And in the existing Integrated Solution, having adopted 16 ways that PMOS is integrated, these PMOS pipes will have half the PMOS pipe conducting under the extreme applications situation, be 20A; If do not adopt similar way, can cause waste again, promoted cost.In addition; Because LED display is to the specific (special) requirements of display effect, a plurality of capable display units require symmetry as far as possible, and each PMOS pipe corresponds to corresponding capable display unit; So when adopting the system design of individual devices, the PMOS pipe is evenly spread in each corresponding row display unit as far as possible.All PMOS pipes are focused in the chip, can cause because the capable display unit display consistency that the PMOS undue concentration causes is relatively poor.Be integrated into decoding, signal buffer unit so a plurality of row are swept driver element, practicality is very poor.
As stated, owing in traditional LED display cell board, adopted a plurality of individual devices, there are shortcomings such as element is more, cost is high, area is big, signal integrity is poor, reaction velocity is slow, processed complex, easy damage; In existing Integrated Solution; Row sweep driver element the integrated heating problem that causes and serviceable life problem, signal protection circuit the integrity problem that causes of disappearance, relatively poor display effect to showing that the ignorance of inscribing between smear causes, make that the practicality of existing Integrated Solution is relatively poor.
Therefore, be necessary to propose the corresponding techniques scheme, improve the practicality of display system, the elevator system performance.
The utility model content
The purpose of the utility model is intended to solve at least one of above-mentioned technological deficiency; Through selectivity the circuit function module is carried out integratedly especially, improved the production efficiency and the reliability of LED display drive apparatus, reduced the cost of display system; Optimize system performance, improved practicality.
In order to achieve the above object; The embodiment of the utility model has proposed a kind of display drive apparatus on the one hand; Comprise decoding unit and a plurality of buffer cell, wherein, the input of partial buffer unit is connected with the input of said decoding unit; Be used to receive the signal and the output of outside input, said decoding unit and a plurality of buffer cell are integrated in the same integrated circuit.
The utility model embodiment has also proposed a kind of display drive apparatus on the other hand; Comprise decoding unit and signal protection unit; Wherein, the input signal that said signal protection unit receives and the identical or part input signal of decoding unit of input signal of decoding unit, the output of said signal protection unit connects the Enable Pin of said decoding unit; Be used to control the output of said decoding unit, said decoding unit and signal protection unit are integrated in the same integrated circuit.
The utility model embodiment has also proposed a kind of display drive apparatus on the other hand; Comprise decoding unit and overlapping electric current blanking unit; Wherein, the input of said decoding unit lowest order is connected with the input of overlapping electric current blanking unit, and the output of said overlapping electric current blanking unit connects the Enable Pin of said decoding unit; Be used to control the output of said decoding unit, said decoding unit and overlapping electric current blanking unit are integrated in the same integrated circuit.
The utility model embodiment has also proposed a kind of display drive apparatus on the other hand; Comprise decoding unit, discharge current blanking unit and let out electric unit; Wherein, The input of said decoding unit lowest order is connected with the input of discharge current blanking unit, and the input of said decoding unit is connected with said input of letting out electric unit, and the output of said discharge current blanking unit connects said Enable Pin of letting out electric unit; Be used to control said output of letting out electric unit, said decoding unit, discharge current blanking unit and let out electric unit and be integrated in the same integrated circuit.
The such scheme that the utility model proposes; Carry out the circuit function module integrated through selectivity; Can overcome shortcomings such as having adopted the cost that a plurality of individual devices caused is high, area is big, processed complex, easy damage; Improve the production efficiency and the reliability of LED display drive apparatus, reduced the cost of display system, optimized system performance.In addition, the such scheme that the utility model proposes, implementation is simple, efficient.
Aspect that the utility model is additional and advantage part in the following description provide, and part will become obviously from the following description, or recognize through the practice of the utility model.
Description of drawings
Above-mentioned and/or additional aspect of the utility model and advantage are from obviously with easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is a LED screen cell board functional schematic in the prior art;
Fig. 2 is the utility model embodiment A synoptic diagram;
Fig. 3 is code translator conversion combination synoptic diagram;
Fig. 4 is the utility model embodiment B synoptic diagram;
Fig. 5 is the utility model embodiment C synoptic diagram;
Fig. 6 is decoding output overlapping synoptic diagram;
Fig. 7 is the utility model embodiment D synoptic diagram;
Fig. 8 has caused demonstration smear synoptic diagram for stray capacitance;
Fig. 9 is the utility model embodiment E synoptic diagram;
Figure 10 is the utility model embodiment F synoptic diagram;
Figure 11 is a 3-8 code translator synoptic diagram;
Figure 12 is the utility model embodiment G synoptic diagram;
Figure 13 is the utility model embodiment H synoptic diagram;
Figure 14 is the utility model embodiment I synoptic diagram.
Embodiment
Describe the embodiment of the utility model below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the utility model, and can not be interpreted as restriction the utility model.
In order to realize the purpose of the utility model; The utility model embodiment has proposed a kind of display drive apparatus; Comprise decoding unit and a plurality of buffer cell, wherein, the input of partial buffer unit is connected with the input of said decoding unit; Be used to receive the signal and the output of outside input, said decoding unit and a plurality of buffer cell are integrated in the same integrated circuit.
Particularly, the utility model provides a kind of IC apparatus that is used for LED display, and inside comprises a plurality of signal buffer units, decoding unit, and the data input pin of encoded control unit need not to be connected with the output terminal of data buffer unit.Embodiment is as shown in Figure 2.
This embodiment comprises a plurality of impact dampers as buffer cell, and is corresponding, and a plurality of inputs are arranged, a plurality of outputs; Impact damper inside comprises the signal input unit that is used for signal shaping, comprises the signal transmission unit that is used for transmission fast and does, and comprises to increase output driving force and the signal output unit of avoiding overlapping, and the number of impact damper is confirmed according to actual needs.
Also comprise code translator in the foregoing description.As the embodiment of the utility model, said code translator is the 3-8 code translator.Be input as AIN, BIN, CIN, be output as AOUT, BOUT, COUT, Y0～Y7.Wherein the linkage unit between AIN and AOUT, BIN and BOUT, CIN and COUT is an impact damper, and effect is the same with a plurality of impact dampers of implementation and above-mentioned buffer cell.The relation of AIN, BIN, CIN and Y0～Y7, adopt truth table following:
| 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, and 1, H represents high level, and output acquiescence attitude is H.
Certainly, in practical application, code translator can adopt the 2-4 code translator.In addition, the 3-8 code translator also can add the EN that enables of 2 anti-phases at code translator, ENN, and expansion is used as code translator, and is as shown in Figure 3.Relation such as following table that this enables and exports:
| EN | ENN | Output |
| 0 | 0 | H |
| 0 | 1 | |
| 1 | 0 | |
| 1 | 1 | Input effectively |
That is: with A, the A of two 2-4 code translators of B signal adding, B end, the C signal adds the ENN end of first 2-4 code translator, EN termination power voltage; The C signal adds the EN end of second 2-4 code translator, ENN termination ground voltage.
Embodiment as the utility model; Said integrated circuit also comprises the signal protection unit; The input signal that the signal protection unit receives connects the Enable Pin of said decoding unit with the identical or part input signal of decoding unit of input signal of decoding unit, output.Particularly, when the signal frequency of said outside input was lower than predetermined threshold or fixed level time width and is higher than predetermined threshold, said signal protection element output signal acted on the Enable Pin of said decoding unit, closes the output of said decoding unit.
Embodiment is as shown in Figure 4.The input of signal protection unit is the input of code translator, and output is used to control enabling of code translator.If signal occurs unusual, signal protection unit controls code translator cuts out all outputs; Also can the output of all impact dampers be closed.
In the present embodiment,, certainly, also can select BIN or CIN etc. for use, also can the input of code translator all be protected the input AIN of code translator input as the signal protection unit.When the incoming frequency of AIN is lower than a certain setting value, just thinks this abnormal signal, and then code translator cuts out, otherwise let the code translator operate as normal.Certainly, also can add an enable port, optional this signal protection unit that whether uses in practical application in the signal protection unit.
The utility model further provides a kind of IC apparatus that is used for LED display, on the basis of the foregoing description, increases overlapping electric current blanking unit.Integrated circuit also comprises overlapping electric current blanking unit, and the lowest order of said decoding unit input signal is connected with the input of said overlapping electric current blanking unit, and the output of said overlapping electric current blanking unit connects the Enable Pin of said decoding unit.
Particularly, when the rising edge of the lowest order of said decoding unit input signal or negative edge arrived, said signal protection element output signal acted on the Enable Pin of said decoding unit, closes the output of said decoding unit.
Embodiment is as shown in Figure 5.The lowest order of code translator is imported the input of AIN as overlapping electric current blanking unit, and each after arrival (rising or the negative edge) as AIN produces a pulse, and this pulse will be closed the output (being high level) of code translator.Certainly, also can add an enable port in overlapping electric current blanking unit, optional whether the use should overlapping electric current blanking function in practical application.Also can external resistor or electric capacity, the blanking time is carried out peripheral hardware control.
The blanking of overlapping electric current is used for avoiding the decoder output mouth in variation, has the phenomenon that overlaps, and is as shown in Figure 6.When the input of code translator changed, effectively output port also changed accordingly.Overlapping electric current blanking unit detects each variation of code translator lowest order input AIN, and code translator is exported temporary close.The output of can staggering like this overlaps, and then it is secretly bright to avoid causing LED display to produce.
The utility model also provides a kind of IC apparatus that is used for LED display, increases discharge current blanking unit and lets out electric unit.Integrated circuit also comprises discharge current blanking unit and lets out electric unit; The lowest order of said decoding unit input signal is connected with the input of said discharge current blanking unit; The input of said decoding unit is connected with said input of letting out electric unit, and the output of said discharge current blanking unit connects said Enable Pin of letting out electric unit.
Embodiment is as shown in Figure 7.The lowest order of code translator is imported the input of AIN as discharge current blanking unit, and each after arrival (rising or the negative edge) as AIN produces a pulse, and the effective output port that allows to let out electric unit is discharged in this pulse.The input of letting out electric unit is the input of code translator and the output of discharge current blanking unit.AIN, BIN, CIN are used to select the corresponding electricity row of letting out, and the output port of discharge current blanking unit is used to control the time span of letting out electricity.Certainly, also can add an enable port, optional this discharge current blanking function that whether uses in practical application in discharge current blanking unit.Also can external resistor or electric capacity, the blanking time is carried out peripheral hardware control.
When the inswept journey that is used for the discharge current blanking function avoiding being expert at enters a new line,, make the LED lamp of adjacent lines produce secretly bright, as shown in Figure 8 because row is swept drive ports, column rule and the stray capacitance store charge of the LED lamp that is connected is let out electricity.When lighting the 2nd row, the voltage of stray capacitance CR reaches supply voltage, is generally 5V in the practical application; Close the 2nd row then, when lighting the 3rd row, because the influence of the spurious charge of CR, the lamp of the 2nd row the 2nd row that should extinguish has produced dark bright.Let out and the spurious charge of CR is released totally in the certain hour electric control unit can be lighted the 3rd row after closing the 2nd row before.
Notice signal protection function, overlapping electric current blanking function, the not conflict each other of discharge current blanking function of deriving on the above-mentioned practical implementation basis; Can take any being combined and used in the same IC apparatus, also can use simultaneously in same IC apparatus.Therefore, integrated circuit also comprises signal protection unit and overlapping electric current blanking unit,
The input signal that said signal protection unit receives connects the Enable Pin of said decoding unit with the identical or part input signal of decoding unit of input signal of decoding unit, output; The lowest order of said decoding unit input signal is connected with the input of said overlapping electric current blanking unit, and the output of said overlapping electric current blanking unit connects the Enable Pin of said decoding unit.Embodiment is as shown in Figure 9.
The display drive apparatus of the above-mentioned proposition of the utility model comprises decoding unit and a plurality of buffer cell, can and let out one or more being integrated in wherein in the electric unit with signal protection unit, overlapping electric current blanking unit, discharge current blanking unit.The such scheme that the utility model proposes; Selectivity is integrated with the circuit function module; Can overcome shortcomings such as having adopted the cost that a plurality of individual devices caused is high, area is big, processed complex, easy damage; Improve the production efficiency and the reliability of LED display drive apparatus, reduced the cost of display system, optimized system performance.
The utility model has also proposed a kind of IC apparatus that is used for LED display, on traditional code translator basis, increases the signal protection unit.Embodiment is shown in figure 10.
Particularly; Comprise decoding unit and signal protection unit; Wherein, the input signal that said signal protection unit receives and the identical or part input signal of decoding unit of input signal of decoding unit, the output of said signal protection unit connects the Enable Pin of said decoding unit; Be used to control the output of said decoding unit, said decoding unit and signal protection unit are integrated in the same integrated circuit.
In addition, said integrated circuit also comprises overlapping electric current blanking unit, and the lowest order of said decoding unit input signal is connected with the input of said overlapping electric current blanking unit, and the output of said overlapping electric current blanking unit connects the Enable Pin of said decoding unit; When the rising edge of the lowest order of said decoding unit input signal or negative edge arrived, said signal protection element output signal acted on the Enable Pin of said decoding unit, closes the output of said decoding unit.
In addition; Said integrated circuit also comprises discharge current blanking unit and lets out electric unit; The lowest order of said decoding unit input signal is connected with the input of said discharge current blanking unit; The input of said decoding unit is connected with said input of letting out electric unit, and the output of said discharge current blanking unit connects said Enable Pin of letting out electric unit.
Particularly, the identical or part input signal of decoding unit of the input signal of the input signal that receives of said signal protection unit and decoding unit comprises:
The input of said signal protection unit is connected with the input of the part of said decoding unit, and the input of perhaps said signal protection unit is connected with whole inputs of said decoding unit.
Figure 11 is traditional 3-8 code translator synoptic diagram, and universal models is 74HC138.Have 16 pins.Wherein VDD and GND are respectively power supply and ground.AIN, BIN, the CIN of the corresponding present embodiment of A0～A2.E1, E2, E3 are enabling of this code translator.Wherein work as E1, E2, during E3=001 (L, L, H), normal decoding; Otherwise close output, closing output state is H.
The input of signal protection unit is the input of code translator, and output is used to control enabling of code translator.If signal occurs unusual, signal protection unit controls code translator cuts out all outputs.
In the above-described embodiments,, certainly, also can select BIN or CIN etc. for use, also can the input of code translator all be protected the input AIN of code translator input as the signal protection unit.When the incoming frequency of AIN is lower than a certain setting value, when perhaps the fixed level time width is longer than a certain setting value, just thinks this abnormal signal, and then code translator cuts out, otherwise let the code translator operate as normal.Certainly, also can add an enable port, optional this signal protection unit that whether uses in practical application in the signal protection unit.This enable port can (for example E1 be E2) shared with the Enable Pin of traditional 74HC138.
The utility model further provides a kind of IC apparatus that is used for LED display, on traditional code translator basis, increases overlapping electric current blanking unit.Embodiment is shown in figure 12.
Particularly; Comprise decoding unit and overlapping electric current blanking unit; Wherein, the input of said decoding unit lowest order is connected with the input of overlapping electric current blanking unit, and the output of said overlapping electric current blanking unit connects the Enable Pin of said decoding unit; Be used to control the output of said decoding unit, said decoding unit and overlapping electric current blanking unit are integrated in the same integrated circuit.
In addition; Said integrated circuit also comprises the signal protection unit; Wherein, the input signal that said signal protection unit receives and the identical or part input signal of decoding unit of input signal of decoding unit, the output of said signal protection unit connects the Enable Pin of said decoding unit.
In addition; Said integrated circuit also comprises discharge current blanking unit and lets out electric unit; The lowest order of said decoding unit input signal is connected with the input of said discharge current blanking unit; The input of said decoding unit is connected with said input of letting out electric unit, and the output of said discharge current blanking unit connects said Enable Pin of letting out electric unit.
The lowest order of code translator is imported the input of AIN as overlapping electric current blanking unit, and each after arrival (rising or the negative edge) as AIN produces a pulse, and this pulse will be closed the output (being high level) of code translator.Certainly, also can add an enable port in overlapping electric current blanking unit, optional whether the use should overlapping electric current blanking function in practical application.This enable port can be shared with the Enable Pin of 74HC138.Also can external resistor or electric capacity, the blanking time is carried out peripheral hardware control.
The blanking of overlapping electric current is used for avoiding the decoder output mouth in variation, has the phenomenon that overlaps.As shown in Figure 6.When the input of code translator changed, effectively output port also changed accordingly.This overlapping electric current blanking unit detects each variation of code translator lowest order input AIN, and code translator is exported temporary close.The output of can staggering like this overlaps, and then it is secretly bright to avoid causing LED display to produce.
The utility model also provides a kind of IC apparatus that is used for LED display, on traditional code translator basis, increases discharge current blanking unit and lets out electric unit.Embodiment is shown in figure 13.
Particularly; Comprise decoding unit, discharge current blanking unit and let out electric unit that wherein, the input of said decoding unit lowest order is connected with the input of discharge current blanking unit; The input of said decoding unit is connected with said input of letting out electric unit; The output of said discharge current blanking unit connects said Enable Pin of letting out electric unit, is used to control said output of letting out electric unit, said decoding unit, discharge current blanking unit and let out electric unit and be integrated in the same integrated circuit.
In addition; Said integrated circuit also comprises the signal protection unit; Wherein, the input signal that said signal protection unit receives and the identical or part input signal of decoding unit of input signal of decoding unit, the output of said signal protection unit connects the Enable Pin of said decoding unit.
In addition; Said integrated circuit also comprises overlapping electric current blanking unit, and wherein, the input of said decoding unit lowest order is connected with the input of overlapping electric current blanking unit; The output of said overlapping electric current blanking unit connects the Enable Pin of said decoding unit, is used to control the output of said decoding unit.
The lowest order of code translator is imported the input of AIN as discharge current blanking unit, and each after arrival (rising or the negative edge) as AIN produces a pulse, and the effective output port that allows to let out electric unit is discharged in this pulse.The input of letting out electric unit is the input of code translator and the output of discharge current blanking unit.AIN, BIN, CIN are used to select the corresponding electricity row of letting out, and the output port of discharge current blanking unit is used to control the time span of letting out electricity.Certainly, also can add an enable port, optional this discharge current blanking function that whether uses in practical application in discharge current blanking unit.Also can external resistor or electric capacity, the blanking time is carried out peripheral hardware control.
When the inswept journey that is used for the discharge current blanking function avoiding being expert at enters a new line,, make the LED lamp of adjacent lines produce secretly bright because row is swept drive ports, column rule and the stray capacitance store charge of the LED lamp that is connected is let out electricity.As shown in Figure 8.When lighting the 2nd row, the voltage of stray capacitance CR reaches supply voltage, is generally 5V in the practical application; Close the 2nd row then, when lighting the 3rd row, because the influence of the spurious charge of CR, the lamp of the 2nd row the 2nd row that should extinguish has produced dark bright.Originally let out and the spurious charge of CR is released totally in the certain hour electric control unit can be lighted the 3rd row after closing the 2nd row before.
Notice signal protection function, overlapping electric current blanking function and discharge current blanking function in the foregoing description; Not conflict each other; Can take any being combined and used in the same IC apparatus; Also can use simultaneously in same IC apparatus, shown in figure 14, also belong within the protection domain of the utility model.
The such scheme that the utility model proposes has proposed signal protection unit, overlapping electric current blanking unit, discharge current blanking unit and has let out one or more being integrated in the code translator in the electric unit.The such scheme selectivity is integrated with the circuit function module; Can overcome shortcomings such as having adopted the cost that a plurality of individual devices caused is high, area is big, processed complex, easy damage; Also can solve in the existing Integrated Solution; The row that exists sweep driver element the integrated heating problem that causes and serviceable life problem, the problem of integrity problem that the disappearance of signal protection circuit is caused and relatively poor display effect that the ignorance that shows smear problem is caused also can finely be resolved, and has improved the production efficiency and the reliability of LED display drive apparatus; Reduce the cost of display system, optimized system performance.
Compared with prior art, the utility model provides the scheme and the device of the problems that exist in solution a plurality of individual devices that existing LED cell board adopts and the existing Integrated Solution.Through the realization of this programme, make the number of chips of each led display unit plate reduce significantly, more convenient processing has simultaneously strengthened reliability, has reduced production, maintenance cost.
One of ordinary skill in the art will appreciate that and realize that all or part of step that the foregoing description scheme is carried is to instruct relevant hardware to accomplish through program; Described program can be stored in a kind of computer-readable recording medium; This program comprises one of step or its combination of scheme implementation example when carrying out.
In addition, each functional unit in each embodiment of the utility model can be integrated in the processing module, also can be that the independent physics in each unit exists, and also can be integrated in the module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If said integrated module realizes with the form of software function module and during as independently production marketing or use, also can be stored in the computer read/write memory medium.
The above-mentioned storage medium of mentioning can be a ROM (read-only memory), disk or CD etc.
The above only is the embodiment of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection domain of the utility model.
Claims (15)
1. display drive apparatus; It is characterized in that; Comprise decoding unit and a plurality of buffer cell, wherein, the input of partial buffer unit is connected with the input of said decoding unit; Be used to receive the signal and the output of outside input, said decoding unit and a plurality of buffer cell are integrated in the same integrated circuit.
2. display drive apparatus as claimed in claim 1; It is characterized in that; Said integrated circuit also comprises the signal protection unit; The input signal that said signal protection unit receives connects the Enable Pin of said decoding unit with the identical or part input signal of decoding unit of input signal of decoding unit, output; When the signal frequency of said outside input was lower than predetermined threshold or fixed level time width and is higher than predetermined threshold, said signal protection element output signal acted on the Enable Pin of said decoding unit, closes the output of said decoding unit.
3. like claim 1 or 2 one of any described display drive apparatus; It is characterized in that; Said integrated circuit also comprises overlapping electric current blanking unit; The lowest order of said decoding unit input signal is connected with the input of said overlapping electric current blanking unit, and the output of said overlapping electric current blanking unit connects the Enable Pin of said decoding unit; When the rising edge of the lowest order of said decoding unit input signal or negative edge arrived, said signal protection element output signal acted on the Enable Pin of said decoding unit, closes the output of said decoding unit.
4. display drive apparatus as claimed in claim 3; It is characterized in that; Said integrated circuit also comprises discharge current blanking unit and lets out electric unit; The lowest order of said decoding unit input signal is connected with the input of said discharge current blanking unit, and the input of said decoding unit is connected with said input of letting out electric unit, and the output of said discharge current blanking unit connects said Enable Pin of letting out electric unit.
5. like claim 1 or 2 one of any described display drive apparatus; It is characterized in that; Said integrated circuit also comprises discharge current blanking unit and lets out electric unit; The lowest order of said decoding unit input signal is connected with the input of said discharge current blanking unit, and the input of said decoding unit is connected with said input of letting out electric unit, and the output of said discharge current blanking unit connects said Enable Pin of letting out electric unit.
6. display drive apparatus as claimed in claim 5 is characterized in that, said integrated circuit also comprises signal protection unit and overlapping electric current blanking unit,
The input signal that said signal protection unit receives connects the Enable Pin of said decoding unit with the identical or part input signal of decoding unit of input signal of decoding unit, output;
The lowest order of said decoding unit input signal is connected with the input of said overlapping electric current blanking unit, and the output of said overlapping electric current blanking unit connects the Enable Pin of said decoding unit.
7. display drive apparatus; It is characterized in that, comprise decoding unit and signal protection unit, wherein; The input signal that said signal protection unit receives and the identical or part input signal of decoding unit of input signal of decoding unit; The output of said signal protection unit connects the Enable Pin of said decoding unit, is used to control the output of said decoding unit, and said decoding unit and signal protection unit are integrated in the same integrated circuit.
8. display drive apparatus as claimed in claim 7; It is characterized in that; Said integrated circuit also comprises overlapping electric current blanking unit; The lowest order of said decoding unit input signal is connected with the input of said overlapping electric current blanking unit, and the output of said overlapping electric current blanking unit connects the Enable Pin of said decoding unit; When the rising edge of the lowest order of said decoding unit input signal or negative edge arrived, said signal protection element output signal acted on the Enable Pin of said decoding unit, closes the output of said decoding unit.
9. like claim 7 or 8 one of any described display drive apparatus; It is characterized in that; Said integrated circuit also comprises discharge current blanking unit and lets out electric unit; The lowest order of said decoding unit input signal is connected with the input of said discharge current blanking unit, and the input of said decoding unit is connected with said input of letting out electric unit, and the output of said discharge current blanking unit connects said Enable Pin of letting out electric unit.
10. display drive apparatus; It is characterized in that, comprise decoding unit and overlapping electric current blanking unit, wherein; The input of said decoding unit lowest order is connected with the input of overlapping electric current blanking unit; The output of said overlapping electric current blanking unit connects the Enable Pin of said decoding unit, is used to control the output of said decoding unit, and said decoding unit and overlapping electric current blanking unit are integrated in the same integrated circuit.
11. display drive apparatus as claimed in claim 10; It is characterized in that; Said integrated circuit also comprises the signal protection unit; Wherein, the input signal that said signal protection unit receives and the identical or part input signal of decoding unit of input signal of decoding unit, the output of said signal protection unit connects the Enable Pin of said decoding unit.
12. like claim 10 or 11 one of any described display drive apparatus; It is characterized in that; Said integrated circuit also comprises discharge current blanking unit and lets out electric unit; The lowest order of said decoding unit input signal is connected with the input of said discharge current blanking unit, and the input of said decoding unit is connected with said input of letting out electric unit, and the output of said discharge current blanking unit connects said Enable Pin of letting out electric unit.
13. display drive apparatus; It is characterized in that; Comprise decoding unit, discharge current blanking unit and let out electric unit that wherein, the input of said decoding unit lowest order is connected with the input of discharge current blanking unit; The input of said decoding unit is connected with said input of letting out electric unit; The output of said discharge current blanking unit connects said Enable Pin of letting out electric unit, is used to control said output of letting out electric unit, said decoding unit, discharge current blanking unit and let out electric unit and be integrated in the same integrated circuit.
14. display drive apparatus as claimed in claim 13; It is characterized in that; Said integrated circuit also comprises the signal protection unit; Wherein, the input signal that said signal protection unit receives and the identical or part input signal of decoding unit of input signal of decoding unit, the output of said signal protection unit connects the Enable Pin of said decoding unit.
15. like claim 13 or 14 one of any described display drive apparatus; It is characterized in that; Said integrated circuit also comprises overlapping electric current blanking unit, and wherein, the input of said decoding unit lowest order is connected with the input of overlapping electric current blanking unit; The output of said overlapping electric current blanking unit connects the Enable Pin of said decoding unit, is used to control the output of said decoding unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203233518U CN202230716U (en) | 2011-08-31 | 2011-08-31 | Display driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203233518U CN202230716U (en) | 2011-08-31 | 2011-08-31 | Display driving device |
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| Publication Number | Publication Date |
|---|---|
| CN202230716U true CN202230716U (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203233518U Expired - Lifetime CN202230716U (en) | 2011-08-31 | 2011-08-31 | Display driving device |
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| CN (1) | CN202230716U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102956190A (en) * | 2011-08-31 | 2013-03-06 | 深圳市明微电子股份有限公司 | Display driving and control integrated device |
| CN103871355A (en) * | 2012-12-17 | 2014-06-18 | 上海得倍电子技术有限公司 | LED (light emitting diode) display large-screen high-speed scanning controller |
| CN107633805A (en) * | 2016-07-14 | 2018-01-26 | 上海得倍电子技术有限公司 | Controller for LED display |
-
2011
- 2011-08-31 CN CN2011203233518U patent/CN202230716U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102956190A (en) * | 2011-08-31 | 2013-03-06 | 深圳市明微电子股份有限公司 | Display driving and control integrated device |
| CN102956190B (en) * | 2011-08-31 | 2015-09-02 | 深圳市明微电子股份有限公司 | A kind of display driver control integration device |
| CN103871355A (en) * | 2012-12-17 | 2014-06-18 | 上海得倍电子技术有限公司 | LED (light emitting diode) display large-screen high-speed scanning controller |
| CN103871355B (en) * | 2012-12-17 | 2016-12-28 | 上海得倍电子技术有限公司 | LED shows giant-screen high-velocity scanning controller |
| CN107633805A (en) * | 2016-07-14 | 2018-01-26 | 上海得倍电子技术有限公司 | Controller for LED display |
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