CN102820002B - Display drive method, display driver circuit and system thereof - Google Patents
Display drive method, display driver circuit and system thereof Download PDFInfo
- Publication number
- CN102820002B CN102820002B CN201110156099.0A CN201110156099A CN102820002B CN 102820002 B CN102820002 B CN 102820002B CN 201110156099 A CN201110156099 A CN 201110156099A CN 102820002 B CN102820002 B CN 102820002B
- Authority
- CN
- China
- Prior art keywords
- module
- signal
- output
- input data
- data signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
Embodiments of the invention propose a kind of display drive method, comprise the following steps: signal detection module receives input data signal, detects described input data signal output enable signal; Described driver module receives described input data signal output signal and controls LED device, and described enable signal is closed or opened the output of described driver module.Embodiments of the invention also proposed a kind of display driver circuit and display control program on the other hand.The scheme that the present invention proposes, is integrated into signal testing function in LED display drive chip, thus improves the reliability of LED display drive chip, avoids signal disturbing and causes driving chip and LED to reduce serviceable life, reduce the possibility that device burns.
Description
Technical field
The present invention relates to digital communicating field, specifically, the present invention relates to display drive method, display driver circuit and system thereof.
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.
It is very general in actual applications that LED shows product, and this series products is paid attention to control the change of realistic graphic, and the precision controlling to rich colors.Therefore display data transmissions and display precision control are the basic demands of LED display system functional realiey.But simultaneously due to the application circumstances requirement of this series products, usually in reliability, there is more strict requirement.Reliability is higher, and LED display is more stable, and serviceable life is also more lasting.
Existing systems technology, LED screen powers on or in the process of closing, due to some uncertain factors of internal system, if electric capacity is with residual charge, data line damage etc., easily cause the fault open of LED, when LED is in uncontrolled situation, big current conducting state may be in always, driving chip and LED will be caused like this to reduce serviceable life, even may burn.
Therefore, be necessary to propose corresponding effective technical scheme, improve the performance of driving circuit, improve the serviceable life of LED device, optimize the performance of display system.
Summary of the invention
Object of the present invention is intended at least solve one of above-mentioned technological deficiency, and special passing through increases signal testing function in the driving circuit, improves the reliability of LED display drive chip, avoids because signal disturbing causes driving chip and LED product to reduce serviceable life.
In order to achieve the above object, embodiments of the invention propose a kind of display drive method on the one hand, comprise the following steps:
Signal detection module receives input data signal, detects described input data signal output enable signal;
Driver module receives described input data signal output signal and controls LED device, and described enable signal is closed or opened the output of described driver module;
Wherein, when the frequency of input data signal or persistence level time width exceed predetermined threshold, described enable signal closes the output of described driver module, otherwise opens the output of described driver module;
Described predetermined threshold is fixed gate limit value or described predetermined threshold is interval, and frequency and the described persistence level time of described input data signal are inverse relation.
Embodiments of the invention also proposed a kind of display driver circuit on the other hand, comprise signal detection module and driver module,
Described signal detection module, for receiving input data signal, detect described input data signal output enable signal, described enable signal connects the output of described driver module;
Described driver module connects external LED equipment, and for receiving described input data signal, output signal controls described LED device, and wherein, described enable signal is closed or opened the output of described driver module;
Wherein, when the frequency of the input data signal that oscillator and timing circuit module obtain or persistence level time width exceed predetermined threshold, output signal sampling module controls the output that enable module closes described driver module, otherwise opens the output of described driver module;
Described predetermined threshold is fixed gate limit value or described predetermined threshold is interval, and frequency and the described persistence level time of described input data signal are inverse relation.
Embodiments of the invention also proposed a kind of display control program on the other hand, comprise master control set, decoding drive unit and display driver circuit,
Described master control set, for controlling described decoding drive unit, selecting corresponding LED device to show, and input data signal is passed to display driver circuit;
Described decoding drive unit, for selecting corresponding LED device according to the control signal of described master control set;
Described display driver circuit, for according to input data signal, controls the display translation of the LED device that described decoding drive unit is selected, comprises signal detection module and driver module,
Described signal detection module, for receiving input data signal, detect described input data signal output enable signal, described enable signal connects the output of described driver module;
Described driver module connects external LED equipment, and for receiving described input data signal, output signal controls described LED device, and wherein, described enable signal is closed or opened the output of described driver module;
When the frequency of the input data signal that oscillator and timing circuit module obtain or persistence level time width exceed predetermined threshold, output signal sampling module controls the output that enable module closes described driver module, otherwise opens the output of described driver module;
Described predetermined threshold is fixed gate limit value or described predetermined threshold is interval, and frequency and the described persistence level time of described input data signal are inverse relation.
The such scheme that the present invention proposes, is integrated into signal testing function in LED display drive chip, thus improves the reliability of LED display drive chip, avoids signal disturbing and causes driving chip and LED to reduce serviceable life, reduce device and burn phenomenon.In addition, in actual applications, under not making the condition of any change by the system of existing conceptual design, can directly apply technical scheme of the present invention, compatible with common LED display drive chip, like this under the prerequisite ensureing system compatibility, reliability obtains larger lifting.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 display system structural diagrams intention in prior art;
Fig. 2 is the process flow diagram of embodiment of the present invention display drive method;
Fig. 3 is a kind of display driver circuit functional schematic of the embodiment of the present invention;
Fig. 4 is the another kind of display driver circuit functional schematic of the embodiment of the present invention;
Fig. 5 is the functional schematic of embodiment of the present invention signal detection module;
Fig. 6 is that embodiment of the present invention LED drives port enable module schematic diagram;
Fig. 7 is embodiment of the present invention display circuit figure;
Fig. 8 is the circuit diagram of frequency detection module;
Fig. 9 is embodiment of the present invention display control program 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.
For the ease of understanding the present invention, first introduce LED display system structural drawing conventional in prior art, as shown in Figure 1.This system controls the open and close of LED screen corresponding line by decoding drive unit, is opened and the row of closing it and controlling by LED drive chip.The joining of each row and column, controls display unit, i.e. a LED, thus achieves the display driver to LED screen.
Data are stored by clock signal clk by LED display drive chip, so when the unlatching of this driving chip arranges accordingly, if clock CLK in parallel stops suddenly sending, so opening will keep.Now, if the row control signal that decoding drive unit sends has interference, so undesired signal just may open corresponding row, and so corresponding LED will be lit.When LED is in uncontrolled situation, be in big current conducting state always, row will be caused to sweep driving chip and LED reduction in serviceable life, even may burn.
The present invention proposes, and is integrated in LED display drive chip by signal testing function, thus improves the reliability of LED display drive chip, avoids signal disturbing and causes driving chip and LED to reduce serviceable life, even burn phenomenon.In the application, the system that the present invention proposes does not make the condition of any change to existing system under, can be compatible with common LED display drive chip, like this under the prerequisite ensureing system compatibility, reliability obtains larger lifting.
In order to realize the object of the present invention, the present invention proposes a kind of display drive method, comprising the following steps: signal detection module receives input data signal, detects described input data signal output enable signal; Described driver module receives described input data signal output signal and controls LED device, and described enable signal is closed or opened the output of described driver module.
As shown in Figure 2, be the display drive method process flow diagram that the present invention proposes, comprise the following steps:
S110: signal detection module is according to input data signal output enable signal.
In step s 110, signal detection module receives input data signal, detects described input data signal output enable signal.
Specifically, detect described input data signal output enable signal to comprise the following steps:
Signal detection module receives input data signal, detects frequency or the persistence level time width of input data signal, exports corresponding enable signal according to frequency or persistence level time width to the comparative result of predetermined threshold.
Specifically, the frequency that signal detection module detects described input data signal comprises the following steps:
Signal detection module receives described input data signal, and when the efficient clock of input data signal is along when entering, signal detection module resets and starts counting; Signal detection module judges the frequency of described input data signal according to the result of counting.
S120: enable signal is closed or opened the output of driver module.
In the step s 120, driver module receives described input data signal output signal and controls LED device, and enable signal is closed or opened the output of described driver module.
Comparative result output enable signal according to frequency or persistence level time width and predetermined threshold comprises the following steps:
Control enable signal closedown according to frequency or persistence level time width or open the output of driver module, that is: when frequency or persistence level time width exceed predetermined threshold, enable signal closes the output of driver module, otherwise opens the output of driver module.
In the present invention, predetermined threshold can be fixed threshold a, b or an interval [a, b], because signal frequency and fair level time are inverse relation, such as:
When frequency is less than a, or when persistence level time width is greater than 1/a, enable signal closes the output of driver module, otherwise opens the output of driver module;
When frequency is greater than b, or when persistence level time width is less than 1/b, enable signal closes the output of driver module, otherwise opens the output of driver module; Or,
When frequency is between a and b, or persistence level time width between 1/b and 1/a time, enable signal opens the output of driver module, exceeds the output that thresholding then closes driver module.
Suitable threshold value can be selected as the case may be and judge the condition that driver module is opened or closed.
As embodiments of the invention, the output that described driver module was closed or opened to enable signal comprises following two kinds of modes:
The output of driver module exports and controls described LED device after enable module, and enable signal controls the output that described enable module is closed or opened described driver module; Or,
Enable signal is removed or is retained the information on the display data memory module in driver module, realizes the output of closing or opening driver module.
As embodiments of the invention, as shown in Figure 3, for a kind of drive circuit functionality schematic diagram of the method that the relative embodiment of the present invention proposes, by integrated to signal detection module, LED driving port enable module and traditional LED display drive chip (i.e. driver module).
Signal detection module is for detecting driving chip input data signal frequency or persistence level time width.If the frequency of data-signal is more than or equal to setting value or persistence level time width is less than or equal to setting value, control LED is driven port enable module by signal detection module, opens LED and drives port to export; Otherwise if the frequency of detected signal is less than setting value or persistence level time width is greater than setting value, control LED is driven port enable module by signal detection module, close LED and drive port to export.
As embodiments of the invention, as shown in Figure 4, be another the drive circuit functionality schematic diagram of the method that the relative embodiment of the present invention proposes, by signal detection module and driver module integrated.If the frequency of data-signal is more than or equal to setting value or persistence level time width is less than or equal to setting value, enable signal retains the information on the display data memory module in driver module, opens the output of driver module.If the frequency of data-signal is less than setting value or persistence level time width is greater than setting value, enable signal removes the information on the display data memory module in driver module, closes the output of driver module.
As embodiments of the invention, as shown in Figure 5, be the functional schematic of signal detection module, comprise input signal sampling module, reset circuit module, oscillator and timing circuit module and output signal sampling module etc.When data-signal is effectively along when arriving, signal is admitted to signal sampling module samples, the signal of sampling first can to oscillator and timing circuit module resets, then oscillator and timing circuit module are started working, thus judge whether the cycle of input signal is greater than the timing of timing circuit, if be greater than timing time, the output of this timing module is maintained fixed level, and output signal sampling module is maintained logical zero (or logical one); If be less than or equal to timing time, the output of this timing module is maintained pulse signal, and output signal sampling module is maintained logical one (or logical zero).The logic of output signal sampling module exports the enable requirement depending on used enable module, and reasonable reality realizes function match between the two.
Such as, when the frequency of the input data signal obtained to be more than or equal to predetermined threshold by signal detection module or persistence level time width is less than or equal to predetermined threshold, signal detection module controls the output that enable module opens driver module; When the frequency of the input data signal obtained to be less than predetermined threshold by signal detection module or persistence level time width is greater than predetermined threshold, signal detection module controls the output that enable module closes described driver module.
As embodiments of the invention, as shown in Figure 6, for LED drives port enable module schematic diagram, corresponding to the embodiment of said frequencies detection module, when the frequency of detected signal higher than setting value or persistence level time width lower than setting value time, export as logical one; During lower than setting value, export as logical zero, so this enable module adopts the mode with door.If enable signal is logical one, so allow to export; Otherwise, then output is closed.
Corresponding to said method, the embodiment of the present invention also proposed a kind of display driver circuit, comprises signal detection module and driver module.
Specifically, signal detection module is for receiving input data signal, and detect input data signal output enable signal, enable signal connects the output of driver module; Driver module connects external LED equipment, and for receiving input data signal, output signal controls LED device, and wherein, enable signal is closed or opened the output of driver module.
Signal detection module for detecting frequency or the persistence level time width of input data signal, according to frequency or persistence level time width output enable signal.
As the embodiment of above-mentioned driving circuit, concrete schematic diagram as shown in Figure 3, by signal detection module, LED drive port enable module and driver module integrated.
Specifically, signal detection module is for detecting driving chip input data signal frequency or persistence level time width; That is: when frequency or persistence level time width exceed predetermined threshold, enable signal closes the output of driver module, otherwise opens the output of driver module.
In the present invention, predetermined threshold can be fixed threshold a, b or an interval [a, b], because signal frequency and fair level time are inverse relation, such as:
When frequency is less than a, or when persistence level time width is greater than 1/a, enable signal closes the output of driver module, otherwise opens the output of driver module;
When frequency is greater than b, or when persistence level time width is less than 1/b, enable signal closes the output of driver module, otherwise opens the output of driver module; Or,
When frequency is between a and b, or persistence level time width between 1/b and 1/a time, enable signal opens the output of driver module, exceeds the output that thresholding then closes driver module.
Suitable threshold value can be selected as the case may be and judge the condition that driver module is opened or closed.
As the another embodiment of above-mentioned driving circuit, concrete schematic diagram as shown in Figure 4, is another the drive circuit functionality schematic diagram of the method that the relative embodiment of the present invention proposes, by signal detection module and driver module integrated.
Such as, the frequency of data-signal is more than or equal to setting value or persistence level time width is less than or equal to setting value, and enable signal retains the information on the display data memory module in driver module, opens the output of driver module.Otherwise enable signal removes the information on the display data memory module in driver module, close the output of driver module.
Furthermore, signal detection module comprises signal sampling module, reset circuit module, oscillator and timing circuit module and output signal sampling module.
Input data signal, for receiving input data signal, when the efficient clock of input data signal is along when entering, is inputted reset circuit module by signal sampling module.
The input that reset circuit module is used for Received signal strength sampling module resets to oscillator and timing circuit module.
Count after oscillator and timing circuit module are used for reset, judge frequency or the persistence level time width of input data signal.
Output signal sampling module is used for the frequency that oscillator and timing circuit module obtained or persistence level time width value compares with predetermined threshold, output enable signal.
As embodiments of the invention, as shown in Figure 5, be the functional schematic of signal detection module, comprise input signal sampling module, reset circuit module, oscillator and timing circuit module and output signal sampling module etc.When data-signal is effectively along when arriving, signal is admitted to signal sampling module samples, the signal of sampling first can to oscillator and timing circuit module resets, then oscillator and timing circuit module are started working, thus judge whether the cycle of input signal is greater than the timing of timing circuit, if be greater than timing time, the output of this timing module is maintained fixed level, and output signal sampling module is maintained logical zero (or logical one); If be less than or equal to timing time, the output of this timing module is maintained pulse signal, and output signal sampling module is maintained logical one (or logical zero).The logic of output signal sampling module exports the enable requirement depending on used enable module, and reasonable reality realizes function match between the two.
The output of described driver module is closed or opened to enable module, for receiving the described enable signal of described signal detection module input.
Such as, when the frequency that oscillator and timing circuit module obtain is more than or equal to predetermined threshold or persistence level time width value is less than or equal to predetermined threshold, output signal sampling module controls the output that enable module opens described driver module; Otherwise output signal sampling module controls the output that described enable module closes described driver module.
As embodiments of the invention, as shown in Figure 6, for LED drives port enable module schematic diagram, corresponding to the embodiment of said frequencies or persistence level time width detection module, when the frequency of detected signal is higher than when equaling setting value or when persistence level time width is less than or equal to setting value, export as logical one; During lower than setting value, export as logical zero, so this enable module adopts the mode with door.If enable signal is logical one, so allow to export; Otherwise, then output is closed.
Driver module, for receiving input data signal, outputs signal and controls LED device via described enable module.
In order to set forth the present invention further, below in conjunction with physical circuit, application of the present invention is described.
Circuits System as shown in Figure 7, circuit comprises eight bit shift register, eight bit memories, and export and drive tri-state control circuit, In-put design has SMIT buffer circuit.Shift register is shifted when shift clock rising edge, and storer stores when store clock rising edge.The shift register of this circuit all adopts rising edge flip-flop shift, and storer all adopts rising edge to trigger and stores.Shift register is reset to " 0 " for time " 0 " in reset signal.3 states export and export for forbidding when control signal is high level, allow for exporting during low level.
Fig. 8 is a kind of circuit realiration of frequency detection module.The pulse that RS will generate a 60ns is accordingly exported when input signal has a rising edge, come to reset to trigger ff1 by this pulse, CLK signal provides trigger pip for exporting sample trigger ff2 simultaneously, in order to avoid exporting the risky motive of sample circuit, CLK signal differs the time delay of 20ns with the rising edge of RS signal.
When RS signal end receives an effective impulse signal, counter is started working, circuit starts timing, if when not receiving second RS pulse signal in timing course, output Q1 end output pulsewidth of timing circuit is the undersuing of counter timing time width, pulse width is equivalent to the time of an electric capacity C discharge and recharge, and then counter is closed, and electric capacity is cleared.
Negative pulse width:
Wherein, Δ U is electric capacity voltage spread, and I is constant current source output current.
If the time interval of input end two RS signal pulses is less than or equal to the timing time of counter, so exporting will be overlapping between negative pulse, and output level is continuously low.Two the RS pulse signals inputted else if interval greater than counter timing time, export as a series of frequency is equal with input signal, pulsewidth is the negative pulse of counter timing time.
Trigger ff2 sampling Q1 signal, trigger ff2 can by set when system electrification, triggered time is controlled by the rising edge of input signal, so when Q1 is continuously low level, output Y is high level " 1 ", when Q1 is negative pulse, sample trigger ff2 can sample at the 20ns place before negative pulse arrives, so exporting Y is low level " 0 ".
As seen from Figure 7, the output Y of this circuit and the parallel output signal phase of eight bit memories with, when the cycle of input signal is less than or equal to the cycle T c of judgement, export Y=" 1 ", chip exports and is opened, when the cycle of input signal is greater than the cycle T c of judgement, export Y=" 0 ", chip exports and is closed.
Therefore, on normal process display basis, effective interference-shielded signal, adds reliability, reduces system cost.
As described in Figure 9, the embodiment of the present invention also proposed a kind of display control program.Comprise master control set, decoding drive unit and display driver circuit as above.
Specifically, comprise master control set, decoding drive unit and display driver circuit,
Wherein, master control set, for controlling decoding drive unit, is selected corresponding LED device to show, and input data signal is passed to display driver circuit.
Decoding drive unit is used for selecting corresponding LED device according to the control signal of master control set.
Display driver circuit is used for according to input data signal, controls the display translation of the LED device that decoding drive unit is selected, comprises signal detection module and driver module.
Signal detection module is for receiving input data signal, and detect input data signal output enable signal, enable signal connects the output of driver module.
Signal detection module comprises signal sampling module, reset circuit module, oscillator and timing circuit module and output signal sampling module,
Signal sampling module and reset circuit module and oscillator and timing circuit model calling, signal sampling module receives input data signal, when the efficient clock of input data signal is along when entering, input data signal is inputted reset circuit module;
Reset circuit module and oscillator and timing circuit model calling, the input of reset circuit module Received signal strength sampling module, resets to oscillator and timing circuit module;
Count after oscillator and timing circuit module resets, judge frequency or the persistence level time width of input data signal;
Output signal sampling module and oscillator and timing circuit model calling, output signal frequency that oscillator and timing circuit module obtain by sampling module or persistence level time width compares with predetermined threshold, output enable signal.
Driver module connects external LED equipment, and for receiving input data signal, output signal controls LED device, and wherein, enable signal is closed or opened the output of driver module.
Such as, when the frequency that oscillator and timing circuit module obtain or persistence level time width exceed predetermined threshold, enable signal closes the output of driver module, otherwise opens the output of driver module.
In the present invention, predetermined threshold can be fixed threshold a, b or an interval [a, b], because signal frequency and fair level time are inverse relation, such as:
When frequency is less than a, or when persistence level time width is greater than 1/a, enable signal closes the output of driver module, otherwise opens the output of driver module;
When frequency is greater than b, or when persistence level time width is less than 1/b, enable signal closes the output of driver module, otherwise opens the output of driver module; Or,
When frequency is between a and b, or persistence level time width between 1/b and 1/a time, enable signal opens the output of driver module, exceeds the output that thresholding then closes driver module.
Suitable threshold value can be selected as the case may be and judge the condition that driver module is opened or closed.
Above-mentioned display control program, further comprises enable module, and the output of driver module exports and controls LED device after enable module, and enable signal controls the output that enable module is closed or opened driver module; Or,
Enable signal is connected with the display data memory module in driver module, and enable signal is removed or retained the information on display data memory module, realizes the output of closing or opening driver module.
According to practical service environment, all input ports of common LED display driver chip all can be used as the input end of signal detection module.
As described in Figure 9; system controls the row of LED array by decoding drive unit; the row of LED array are controlled by LED display drive chip; do not increase the prerequisite of any peripheral component in system under; be integrated in the signal deteching circuit of LED display drive chip inside; the control signal that can effectively produce at master control set disconnects suddenly; timely closedown LED array; protect system; avoid the long-time big current conducting of LED array, and cause burning of driving chip and LED.
The said method that the present invention proposes or equipment, signal testing function is integrated in LED display drive chip, thus improve the reliability of LED display drive chip, avoid signal disturbing and cause driving chip and LED to reduce serviceable life, reduce device and burn phenomenon.In addition, in actual applications, under not making the condition of any change by the system of existing conceptual design, can directly apply technical scheme of the present invention, compatible with common LED display drive chip, like this under the prerequisite ensureing system compatibility, reliability obtains larger lifting.The such scheme that the present invention proposes, implementation is simple, efficient.
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 method, is characterized in that, comprises the following steps:
Signal detection module receives input data signal, detects described input data signal output enable signal;
Driver module receives described input data signal output signal and controls LED device, and described enable signal is closed or opened the output of described driver module;
Wherein, when the frequency of input data signal or persistence level time width exceed predetermined threshold, described enable signal closes the output of described driver module, otherwise opens the output of described driver module;
Described predetermined threshold is fixed gate limit value or described predetermined threshold is interval, and frequency and the described persistence level time of described input data signal are inverse relation.
2. display drive method as claimed in claim 1, is characterized in that, detect described input data signal output enable signal and comprise the following steps:
Described signal detection module receives described input data signal, and detect frequency or the persistence level time width of described input data signal, the fiducial value according to described frequency or persistence level time width and predetermined threshold exports described enable signal.
3. display drive method as claimed in claim 2, is characterized in that, detect frequency or the persistence level time width of described input data signal, comprise the following steps:
When the efficient clock of described input data signal is along when entering, described signal detection module is resetted and the clock provided by internal oscillator, starts timing;
Described signal detection module according to the result of timing, the efficient clock of input data signal described in Real-Time Monitoring along and next efficient clock along between time.
4. display drive method as claimed in claim 2, is characterized in that, exports described enable signal comprise the following steps according to the fiducial value of described frequency or persistence level time width and predetermined threshold:
Control the closedown of described enable signal according to described frequency or persistence level time width or open the output of described driver module.
5. display drive method as claimed in claim 4, is characterized in that, the output that described driver module was closed or opened to described enable signal comprises:
The output of described driver module exports and controls described LED device after enable module, and described enable signal controls the output that described enable module is closed or opened described driver module; Or,
Described enable signal is removed or is retained the information on the display data memory module in described driver module, realizes the output of closing or opening described driver module.
6. a display driver circuit, is characterized in that, comprises signal detection module and driver module,
Described signal detection module, for receiving input data signal, detect described input data signal output enable signal, described enable signal connects the output of described driver module;
Described driver module connects external LED equipment, and for receiving described input data signal, output signal controls described LED device, and wherein, described enable signal is closed or opened the output of described driver module;
Wherein, when the frequency of the input data signal that oscillator and timing circuit module obtain or persistence level time width exceed predetermined threshold, output signal sampling module controls the output that enable module closes described driver module, otherwise opens the output of described driver module;
Described predetermined threshold is fixed gate limit value or described predetermined threshold is interval, and frequency and the described persistence level time of described input data signal are inverse relation.
7. display driver circuit as claimed in claim 6, is characterized in that, described signal detection module comprises signal sampling module, reset circuit module, oscillator and timing circuit module and output signal sampling module,
Described signal sampling module and described reset circuit module and described oscillator and timing circuit model calling, described signal sampling module receives described input data signal, when the efficient clock of described input data signal is along when entering, described input data signal is inputted described reset circuit module;
Described reset circuit module and described oscillator and timing circuit model calling, described reset circuit module receives the input of described signal sampling module, resets to described oscillator and timing circuit module;
Count after described oscillator and timing circuit module resets, judge frequency or the persistence level time width of described input data signal;
Described output signal sampling module and described oscillator and timing circuit model calling, the frequency that described oscillator and timing circuit module obtain by described output signal sampling module or persistence level time width compare with predetermined threshold, output enable signal.
8. display driver circuit as claimed in claim 6, is characterized in that,
Also comprise enable module, the output of described driver module exports and controls described LED device after described enable module, and described enable signal controls the output that described enable module is closed or opened described driver module; Or,
Described enable signal is connected with the display data memory module in described driver module, the information that described enable signal is removed or retained on described display data memory module, realizes the output of closing or opening described driver module.
9. a display control program, is characterized in that, comprises master control set, decoding drive unit and display driver circuit,
Described master control set, for controlling described decoding drive unit, selecting corresponding LED device to show, and input data signal is passed to display driver circuit;
Described decoding drive unit, for selecting corresponding LED device according to the control signal of described master control set;
Described display driver circuit, for according to input data signal, controls the display translation of the LED device that described decoding drive unit is selected, comprises signal detection module and driver module,
Described signal detection module, for receiving input data signal, detect described input data signal output enable signal, described enable signal connects the output of described driver module;
Described driver module connects external LED equipment, and for receiving described input data signal, output signal controls described LED device, and wherein, described enable signal is closed or opened the output of described driver module;
When the frequency of the input data signal that oscillator and timing circuit module obtain or persistence level time width exceed predetermined threshold, output signal sampling module controls the output that enable module closes described driver module, otherwise opens the output of described driver module;
Described predetermined threshold is fixed gate limit value or described predetermined threshold is interval, and frequency and the described persistence level time of described input data signal are inverse relation.
10. display control program as claimed in claim 9, is characterized in that, described signal detection module comprises signal sampling module, reset circuit module, oscillator and timing circuit module and output signal sampling module,
Described signal sampling module and described reset circuit module and described oscillator and timing circuit model calling, described signal sampling module receives described input data signal, when the efficient clock of described input data signal is along when entering, described input data signal is inputted described reset circuit module;
Described reset circuit module and described oscillator and timing circuit model calling, described reset circuit module receives the input of described signal sampling module, resets to described oscillator and timing circuit module;
Count after described oscillator and timing circuit module resets, judge frequency or the persistence level time width of described input data signal;
Described output signal sampling module and described oscillator and timing circuit model calling, the frequency that described oscillator and timing circuit module obtain by described output signal sampling module or persistence level time width compare with predetermined threshold, output enable signal.
11. display control programs as claimed in claim 9, is characterized in that,
Also comprise enable module, the output of described driver module exports and controls described LED device after described enable module, and described enable signal controls the output that described enable module is closed or opened described driver module; Or,
Described enable signal is connected with the display data memory module in described driver module, the information that described enable signal is removed or retained on described display data memory module, realizes the output of closing or opening described driver module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110156099.0A CN102820002B (en) | 2011-06-10 | 2011-06-10 | Display drive method, display driver circuit and system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110156099.0A CN102820002B (en) | 2011-06-10 | 2011-06-10 | Display drive method, display driver circuit and system thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102820002A CN102820002A (en) | 2012-12-12 |
| CN102820002B true CN102820002B (en) | 2015-10-14 |
Family
ID=47304094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110156099.0A Active CN102820002B (en) | 2011-06-10 | 2011-06-10 | Display drive method, display driver circuit and system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102820002B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106652888B (en) * | 2016-11-28 | 2023-07-25 | 富满微电子集团股份有限公司 | LED display screen and scanning control circuit thereof |
| CN110120197B (en) * | 2019-04-11 | 2024-03-08 | 深圳天源中芯半导体有限公司 | Cascade application system capable of omitting peripheral resistance and capacitance to reduce interference and implementation method thereof |
| CN109920369A (en) * | 2019-04-12 | 2019-06-21 | 深圳市德普微电子有限公司 | A kind of LED display blank screen energy-saving chip and method |
| CN110930939B (en) * | 2019-12-27 | 2021-04-02 | 深圳市明微电子股份有限公司 | Display screen output port crosstalk prevention method and device |
| CN114141189B (en) * | 2021-12-09 | 2023-11-14 | 奕力科技股份有限公司 | Display driving circuit and display driving method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1889157A (en) * | 2005-06-27 | 2007-01-03 | 康佳集团股份有限公司 | Automatic cut-off protection circuit for LED display screen |
| CN101866613A (en) * | 2007-01-08 | 2010-10-20 | 北京巨数数字技术开发有限公司 | Scanning type LED display device and method for eliminating forward moving hidden brightness thereof |
| CN202189535U (en) * | 2011-06-10 | 2012-04-11 | 深圳市明微电子股份有限公司 | Display and control circuit and display and control device with signal monitoring function |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090033727A (en) * | 2007-10-01 | 2009-04-06 | 삼성전자주식회사 | Apparatus for driving led dot matrix and driving method thereof |
| 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 |
| KR101056248B1 (en) * | 2009-10-07 | 2011-08-11 | 삼성모바일디스플레이주식회사 | Driver IC and organic light emitting display device using the same |
-
2011
- 2011-06-10 CN CN201110156099.0A patent/CN102820002B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1889157A (en) * | 2005-06-27 | 2007-01-03 | 康佳集团股份有限公司 | Automatic cut-off protection circuit for LED display screen |
| CN101866613A (en) * | 2007-01-08 | 2010-10-20 | 北京巨数数字技术开发有限公司 | Scanning type LED display device and method for eliminating forward moving hidden brightness thereof |
| CN202189535U (en) * | 2011-06-10 | 2012-04-11 | 深圳市明微电子股份有限公司 | Display and control circuit and display and control device with signal monitoring function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102820002A (en) | 2012-12-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102820002B (en) | Display drive method, display driver circuit and system thereof | |
| CN105590608A (en) | Touch display device and shift register thereof | |
| CN101141123B (en) | Burr testing apparatus | |
| CN105913822A (en) | GOA (Gate Driver on Array) signal judging circuit and judging method, gate driving circuit and display device | |
| CN102654984B (en) | Shifting register unit and grid driving circuit | |
| US20070061646A1 (en) | Selectable jtag or trace access with data store and output | |
| CN106023919A (en) | Shift register, driving method thereof, driving circuit and display device | |
| CN103795459B (en) | Optical module-based fault processing method, device and optical module | |
| CN105609136A (en) | Shifting register unit, drive method, grid drive circuit and display device | |
| US7535776B1 (en) | Circuit for improved SRAM write around with reduced read access penalty | |
| CN106951123A (en) | Touch-control driver element and its driving method, touch drive circuit, display device | |
| CN105405387A (en) | Shifting register unit, driving method thereof, gate drive circuit and display device | |
| CN107665033B (en) | Digital logic circuit module with reset deburring function | |
| CN103138240A (en) | Backward-flowing current prevention circuit, backward-flowing current prevention method and power supply system | |
| CN107799043A (en) | Detection method, system and the electronic equipment of GOA circuits | |
| CN108008322A (en) | The detection method and circuit of multiple power supplies | |
| US7872488B2 (en) | Tester for testing semiconductor device | |
| CN101556824A (en) | Semiconductor memory device | |
| CN103023467B (en) | Based on register repositioning method and the device of scan mode | |
| CN106356030A (en) | Gate driving circuit | |
| CN109995356A (en) | A kind of signal-isolated transmission circuit based on capacitor | |
| CN109217951A (en) | A kind of transmission delay test method and device based on FPGA | |
| CN212622809U (en) | Detection circuit | |
| US7046066B2 (en) | Method and/or apparatus for generating a write gated clock signal | |
| CN202189535U (en) | Display and control circuit and display and control device with signal monitoring function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |