CN103943068B - Row scanning constant-current driven chip for LED high density display screen - Google Patents
Row scanning constant-current driven chip for LED high density display screen Download PDFInfo
- Publication number
- CN103943068B CN103943068B CN201410132499.1A CN201410132499A CN103943068B CN 103943068 B CN103943068 B CN 103943068B CN 201410132499 A CN201410132499 A CN 201410132499A CN 103943068 B CN103943068 B CN 103943068B
- Authority
- CN
- China
- Prior art keywords
- gradation data
- led
- constant
- outfan
- data input
- 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
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The invention belongs to LED and show actuation techniques field, provide a kind of row scanning constant-current driven chip for LED high density display screen, received and transmit multiple gradation data row scanning constant-current driven chip to next stage according to data clock signal by gradation data input module, and simultaneously by multiple gradation datas output to data processing module；Multiple gradation datas at the corresponding levels are stored by data processing module, and export line scan signals to the multirow LED in LED high density display screen line by line implement row scanning and export corresponding multiple LED switch signal make constant-current driven module correspondingly drive the different colours that every a line LED comprises in LED high density display screen LED luminescence, reach a row scanning constant-current driven chip and multirow LED has been realized row scanning switching and the purpose driven, advantageously reduce number of chips and reduce pcb board wiring difficulty, being favorably improved the display effect of LED high density display screen.
Description
Technical field
The invention belongs to LED and show actuation techniques field, particularly relate to a kind of row scanning constant-current driven chip for LED high density display screen.
Background technology
In recent years, LED shows the development of actuation techniques, and the requirement of LED display is also more and more higher.In order to meet client's demand to the display effect of high-quality, highly dense screen is increasingly becoming the main product in market, no matter is meeting-place or market, it can be seen that the application of more and more highly dense screen.Highly dense screen refers to and a kind of is made up of multiple LED, spacing between multiple LED is little, and the display LED display that picture is more smooth, fine and smooth, resolution is high, being also referred to as LED high density display screen, it is mainly used in indoor and needs closely (are generally less than two meters) and watch the application scenarios showing picture.
Although the LED spacing in highly dense screen is little, and gay colours and fine image quality can be presented, but thus derivative problem is also comed one after another.In the middle of prior art, in the face of the reduction of LED spacing, the parasitic capacitance between the lamp plate of LED display and LED can be made to change on the one hand, thus causing serious motion blur phenomenon and poor low gray scale display effect；On the other hand, reduction along with LED spacing, the area of LED display also can reduce therewith, and when the quantity of driving chip is constant, the highly dense screen that area is less cannot use the driving chip with tradition LED display equal number to realize row scanning and constant-current driving, and the little wiring difficulty that also can make pcb board of area increases, it is unfavorable for saving cost.Therefore, the LED display driving chip existence that prior art provides is not suitable for LED high density display screen, and can make the problem that display effect is deteriorated and application cost increases.
Summary of the invention
It is an object of the invention to provide a kind of row scanning constant-current driven chip for LED high density display screen, aim to solve the problem that and be not suitable for LED high density display screen existing for the LED display driving chip that prior art provides, and the problem that display effect is deteriorated and application cost increases can be made.
The present invention is realized in, a kind of row scanning constant-current driven chip for LED high density display screen, it includes constant-current driven module, and the multirow LED in LED high density display screen is carried out constant-current driving according to LED switch signal output constant current control signal by described constant-current driven module；
Described row scanning constant-current driven chip also includes gradation data input module and data processing module；
Gradation data input and the data clock end of described gradation data input module are respectively connected to multiple gradation data and data clock signal, the data transfer of described gradation data input module exports the plurality of gradation data, the data output end of described gradation data input module connects the data input pin of described data processing module, latch signal end and the grayscale clock end of described data processing module are respectively connected to data latch control signal and grayscale clock signal, the outfan of described data processing module connects the switch signal input end of described constant-current driven module, the row of described data processing module sweeps outfan output line scan signals；
Described gradation data input module receives the plurality of gradation data according to described data clock signal, and the row that the plurality of gradation data is sent to next stage scans constant-current driven chip, and simultaneously by the plurality of gradation data output to described data processing module；Gradation data multiple at the corresponding levels in the plurality of gradation data is stored by described data processing module according to described data latch control signal, and implements line by line go scanning and export corresponding multiple LED switch signal extremely described constant-current driven module to the multirow LED in LED high density display screen according to the plurality of gradation data and described grayscale clock signal output line scan signals；Described constant-current driven module correspondingly exports multiple constant-current control signal according to the plurality of LED switch signal and drives the LED of the different colours that every a line LED comprises in described LED high density display screen luminous.
The present invention includes the row scanning constant-current driven chip for LED high density display screen of gradation data input module, data processing module and constant-current driven module by adopting, multiple gradation datas are received according to data clock signal by gradation data input module, and the row that the plurality of gradation data is sent to next stage scans constant-current driven chip, and simultaneously by the plurality of gradation data output to data processing module；Gradation datas multiple at the corresponding levels in multiple gradation datas are stored by data processing module according to data latch control signal, and export line scan signals according to multiple gradation datas and grayscale clock signal and the multirow LED in LED high density display screen implements row scanning line by line and exports corresponding multiple LED switch signal to constant-current driven module；Constant-current driven module correspondingly exports multiple constant-current control signal according to multiple LED switch signals and drives the LED of the different colours that every a line LED comprises in LED high density display screen luminous, reach a row scanning constant-current driven chip and multirow LED has been realized row scanning switching and the purpose driven, advantageously reduce the quantity of chip and reduce the wiring difficulty of pcb board, it is suitable in LED high density display screen, and is favorably improved the display effect of LED high density display screen.
Accompanying drawing explanation
Fig. 1 is the structure chart of the row scanning constant-current driven chip for LED high density display screen that the embodiment of the present invention provides；
Fig. 2 is the structure chart of the row scanning constant-current driven chip for LED high density display screen that first embodiment of the invention provides；
Fig. 3 is the cut-away view of the gradation data input module in the row scanning constant-current driven chip shown in Fig. 2；
Fig. 4 is the cut-away view of the data processing module in the row scanning constant-current driven chip shown in Fig. 2；
Fig. 5 is the structure chart of the row scanning constant-current driven chip for LED high density display screen that second embodiment of the invention provides；
Fig. 6 is the cut-away view of the gradation data input module in the row scanning constant-current driven chip shown in Fig. 5；
Fig. 7 is the cut-away view of the data processing module in the constant-current driven chip shown in Fig. 5.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 illustrates that the row for LED high density display screen that the embodiment of the present invention provides scans the structure of constant-current driven chip, and for the ease of illustrating, illustrate only the part relevant to the embodiment of the present invention, details are as follows:
The row scanning constant-current driven chip for LED high density display screen that the embodiment of the present invention provides includes constant-current driven module 100, multirow LED in LED high density display screen is carried out constant-current driving according to LED switch signal output constant current control signal by constant-current driven module 100, and constant-current driven module 100 passes through its constant flow regulation port outer meeting resistance to regulate the constant-current control signal constant current value when driving LED.
Row scanning constant-current driven chip also includes gradation data input module 200 and data processing module 300.
nullThe gradation data input of gradation data input module 200 and data clock end DCLK are respectively connected to multiple gradation data and (at least include red-light LED gradation data、Green light LED gradation data and blue-ray LED gradation data，Namely may also include the LED gradation data of other colors，Such as white light LEDs gradation data) and data clock signal，The data transfer of gradation data input module 200 exports above-mentioned multiple gradation datas，The data output end of gradation data input module 200 connects the data input pin of data processing module 300，The latch signal end LE and grayscale clock end GCLK of data processing module 300 are respectively connected to data latch control signal and grayscale clock signal，The outfan OUT of data processing module 300 connects the switch signal input end of constant-current driven module 100，The row of described data processing module is swept outfan L_OUT and is exported line scan signals.
Gradation data input module 200 receives multiple gradation datas according to above-mentioned data clock signal, and the row that multiple gradation datas are sent to next stage scans constant-current driven chip, and simultaneously by multiple gradation datas output to data processing module 300；Gradation datas multiple at the corresponding levels in multiple gradation datas are stored by data processing module 300 according to above-mentioned data latch control signal, and export line scan signals according to multiple gradation datas and above-mentioned grayscale clock signal and the multirow LED in LED high density display screen implements row scanning line by line and exports corresponding multiple LED switch signal to constant-current driven module 100；Constant-current driven module 100 correspondingly exports multiple constant-current control signal according to above-mentioned multiple LED switch signals and drives the LED of the different colours that every a line LED comprises in LED high density display screen luminous.
Wherein, above-mentioned gradation data multiple at the corresponding levels refers to the gradation data being applicable in the multiple gradation datas received by gradation data input module 200 required for current constant-current driven chip, and it at least includes HONGGUANG gradation data at the corresponding levels, green glow gradation data at the corresponding levels and blue light gradation data at the corresponding levels.
Every a line LED in LED high density display screen comprises multiple pixel cell, and each pixel cell at least includes a red-light LED, a green light LED and a blue-ray LED.
The constant flow regulation port of constant-current driven module 100 at least includes HONGGUANG constant flow regulation port, green glow constant flow regulation port and blue light constant flow regulation port, constant-current driven module 100 at least has multiple HONGGUANG current constant control port, multiple green glow current constant control ports and multiple blue light current constant control port, and at least through multiple HONGGUANG current constant control ports, multiple green glow current constant control ports and multiple blue light current constant control port export HONGGUANG constant-current control signal respectively, green glow constant-current control signal and blue light constant-current control signal are to red-light LED, green light LED and blue-ray LED carry out constant-current driving.
The gradation data input of gradation data input module 200 at least includes HONGGUANG gradation data input, green glow gradation data input and blue light gradation data input；The data transfer of gradation data input module 200 at least includes HONGGUANG gradation data transmission end, green glow gradation data transmission end and blue light gradation data transmission end；The data output end of gradation data input module 200 at least includes HONGGUANG gradation data outfan, green glow gradation data outfan and blue light gradation data outfan；The data input pin of data processing module 200 at least includes HONGGUANG gradation data input, green glow gradation data input and blue light gradation data input.
Below in conjunction with specific embodiment, above-mentioned row scanning constant-current driven chip is described in detail:
Embodiment one:
Fig. 2 illustrates that the row for LED high density display screen that first embodiment of the invention provides scans the structure of constant-current driven chip, every a line LED in LED high density display screen comprises multiple pixel cell, each pixel cell includes a red-light LED, a green light LED and a blue-ray LED, for the ease of explanation, illustrate only part related to the present embodiment, details are as follows:
nullOn the basis of the row scanning constant-current driven chip shown in Fig. 1，Multirow LED on LED high density display screen is implemented row scanning by row scanning constant-current driven chip line by line，And the multiple pixel cells in every a line LED are carried out constant-current driving simultaneously，Then the constant flow regulation port of constant-current driven module 100 includes HONGGUANG constant flow regulation port REXT_R、Green glow constant flow regulation port REXT_G and blue light constant flow regulation port REXT_B，Constant-current driven module 100 has multiple HONGGUANG current constant control port (ROUT_0～ROUT_n)、Multiple green glows current constant control port (GOUT_0～GOUT_n) and multiple blue light current constant control port (BOUT_0～BOUT_n)，And by multiple HONGGUANG current constant control port (ROUT_0～ROUT_n)、Multiple green glows current constant control port (GOUT_0～GOUT_n) and multiple blue light current constant control port (BOUT_0～BOUT_n) export HONGGUANG constant-current control signal respectively、Green glow constant-current control signal and blue light constant-current control signal are to red-light LED、Green light LED and blue-ray LED carry out constant-current driving，Each HONGGUANG current constant control port、Green glow current constant control port and blue light current constant control port correspondence respectively drives a red-light LED、Green light LED and blue-ray LED.
The gradation data input of gradation data input module 200 includes HONGGUANG gradation data input DR, green glow gradation data input DG and blue light gradation data input DB；The data transfer of gradation data input module 200 includes HONGGUANG gradation data transmission end DRO, green glow gradation data transmission end DRG and blue light gradation data transmission end DRB；The data output end of gradation data input module 200 includes HONGGUANG gradation data outfan D1, green glow gradation data outfan D2 and blue light gradation data outfan D3；The data input pin of data processing module 300 includes HONGGUANG gradation data input DI1, green glow gradation data input DI2 and blue light gradation data input DI3.
nullWherein，The HONGGUANG gradation data input DR of gradation data input module 200、Green glow gradation data input DG and blue light gradation data input DB receives red-light LED gradation data respectively、Green light LED gradation data and blue-ray LED gradation data，Simultaneously，Rising edge and/or trailing edge at data clock signal，The HONGGUANG gradation data transmission end DRO of gradation data input module 200、Green glow gradation data transmission end DGO and blue light gradation data transmission end DBO is respectively by red-light LED gradation data、Green light LED gradation data and blue-ray LED gradation data are sent to the row scanning constant-current driven chip of next stage，And the HONGGUANG gradation data outfan D1 of gradation data input module 200、Green glow gradation data outfan D2 and blue light gradation data outfan D3 is respectively by red-light LED gradation data、Green light LED gradation data and blue-ray LED gradation data export to data processing module 300.
In an other situation, gradation data input module 200 can only by HONGGUANG gradation data input DR serial received red-light LED gradation data, green light LED gradation data and blue-ray LED gradation data, simultaneously, rising edge and/or trailing edge at data clock signal, the blue light gradation data transmission end DBO of gradation data input module 200 is by red-light LED gradation data, green light LED gradation data and blue-ray LED gradation data serially transfer the row scanning constant-current driven chip to next stage, and the HONGGUANG gradation data outfan of gradation data input module 200, green glow gradation data outfan and blue light gradation data outfan are respectively by red-light LED gradation data, green light LED gradation data and blue-ray LED gradation data export to data processing module 300.
Further, as it is shown on figure 3, gradation data input module 200 includes:
First gating unit the 201, second gating unit the 202, first shift register the 203, second shift register 204 and the 3rd shift register 205；
nullThe data input pin of the first shift register 203、The HONGGUANG gradation data input DR of the first data input pin of the first gating unit 201 and the first data input pin respectively gradation data input module 200 of the second gating unit 202、Green glow gradation data input DG and blue light gradation data input DB，The clock signal terminal of the first shift register 203、The clock signal terminal DCLK that common contact is gradation data input module 200 of the clock signal terminal of the second shift register 204 and the clock signal terminal of the 3rd shift register 205，First outfan of the first shift register 203 connects the second data input pin of the first gating unit 201，First outfan of the second shift register 204 connects the second data input pin of the second gating unit 202，And first first outfan of shift register 203、The HONGGUANG gradation data transmission end DRO of the first outfan of the second shift register 204 and the first outfan respectively gradation data input module 200 of the 3rd shift register 205、Green glow gradation data transmission end DGO and blue light gradation data transmission end DBO，Second outfan of the first shift register 203、The HONGGUANG gradation data outfan D1 of the second outfan of the second shift register 204 and the second outfan respectively gradation data input module 200 of the 3rd shift register 205、Green glow gradation data outfan D2 and blue light gradation data outfan D3，The outfan of the first gating unit 201 and the outfan of the second gating unit 202 connect the data input pin of the second shift register 204 and the data input pin of the 3rd shift register 205 respectively.
nullWherein，The data input pin of the first shift register 203、First data input pin of the first gating unit 201 and the first data input pin of the second gating unit 202 receive red-light LED gradation data respectively、Green light LED gradation data and blue-ray LED gradation data，Second data input pin of the first gating unit 201 and the second data input pin of the second gating unit 202 are turned off，So at the rising edge of data clock signal and/or trailing edge，Green light LED gradation data and blue-ray LED gradation data are exported to the second shift register 204 and the 3rd shift register 205 by the first gating unit 201 and the second gating unit 202 respectively，Then the first shift register 203、Second shift register 204 and the 3rd shift register 205 are respectively by red-light LED gradation data、Green light LED gradation data and blue-ray LED gradation data send the row scanning constant-current driven chip of next stage to，And export to data processing module 300 simultaneously.
nullIn other situations，First data input pin of the first gating unit 201 and the first data input pin of the second gating unit 202 are turned off，The data input pin serial received red-light LED gradation data of the first shift register 203、Green light LED gradation data and blue-ray LED gradation data，Rising edge and/or trailing edge at data clock signal，First shift register 203 passes through its first outfan by red-light LED gradation data、Green light LED gradation data and blue-ray LED gradation data are transferred to the first gating unit 201，First gating unit 201 is by red-light LED gradation data、Green light LED gradation data and blue-ray LED gradation data export to the second shift register 204，Second shift register 204 again through its first outfan by red-light LED gradation data、Green light LED gradation data and blue-ray LED gradation data are transferred to the second gating module 202，Second gating module 202 is by red-light LED gradation data、Green light LED gradation data and blue-ray LED gradation data export to the 3rd shift register 205，Then the first outfan of the 3rd shift register 205 is by red-light LED gradation data、Green light LED gradation data and blue-ray LED gradation data are sent to the row scanning constant-current driven chip of next stage，Meanwhile，Second outfan of the first shift register 203、Second outfan of the second shift register 204 and the second outfan of the 3rd shift register 205 are respectively by red-light LED gradation data、Green light LED gradation data and blue-ray LED gradation data export to data processing module 300.
For data processing module 300, as shown in Figure 2, the row of data processing module 300 is swept outfan L_OUT and is included multiple row and sweep outfan (L0～Ln), it is consistent with the line number of the multirow LED in LED high density display screen that the plurality of row sweeps the quantity of outfan (L0～Ln), when entering line scans, each row is swept the line scan signals that outfan exports and is controlled each pixel cell in every a line LED and first turn on and close afterwards.
The red-light LED gradation data that gradation data input module 200 is exported by data processing module 300 according to data latch control signal, HONGGUANG gradation data at the corresponding levels in green light LED gradation data and blue-ray LED gradation data, green glow gradation data at the corresponding levels and blue light gradation data at the corresponding levels store, and according to grayscale clock signal and HONGGUANG gradation data at the corresponding levels, LED high density display screen is implemented row scanning by green glow gradation data at the corresponding levels and blue light gradation data output line scan signals at the corresponding levels, also correspondingly export red-light LED switching signal simultaneously, green light LED switching signal and blue-ray LED switching signal are to constant-current driven module 100.
Further, as shown in Figure 4, data processing module 300 includes memorizer 301, clock processing unit 302, pulse modulation unit 303, row scan control unit 304 and the shadow discharge cell 305 that disappears.
nullThe first input end of memorizer 301、The HONGGUANG gradation data input DI1 of the second input and the 3rd input respectively data processing module 300、Green glow gradation data input DI2 and blue light gradation data input DI3，And the first input end of memorizer 301、Second input and the 3rd input receive red-light LED gradation data respectively、Green light LED gradation data and blue-ray LED gradation data，The latch signal end LE that control end is data processing module 300 of memorizer 301，The outfan of memorizer 301 connects the data input pin of pulse modulation unit 303，The input of clock processing unit 302 is the grayscale clock end GCLK of data processing module 300，First outfan of clock processing unit 302 connects the input end of clock of pulse modulation unit 303，The outfan of pulse modulation unit 303 is the outfan OUT of data processing module 300，Second outfan of clock processing unit 302 is connected with the input of row scan control unit 304 and the input of the shadow discharge cell 305 that disappears，Multiple row of multiple outfans of row scan control unit 304 respectively data processing module 300 sweep outfan (L0～Ln)，The multiple outfans of shadow discharge cell 305 of disappearing connect respectively multiple outfans of row scan control unit 304 correspondingly.
nullWherein，When data latch control signal effectively (such as Low level effective)，Memorizer 301 is by received red-light LED gradation data、HONGGUANG gradation data at the corresponding levels in green light LED gradation data and blue-ray LED gradation data、Green glow gradation data at the corresponding levels and blue light gradation data at the corresponding levels store，Grayscale clock signal is carried out the modulation clock signal that output frequency after frequency adjustment is different from grayscale clock signal by clock processing unit 302，Pulse modulation unit 303 according to modulation clock signal to HONGGUANG gradation data at the corresponding levels、Green glow gradation data at the corresponding levels and blue light gradation data at the corresponding levels obtain corresponding pulse-modulated signal as LED switch signal output to constant-current driven module 100 after carrying out impulse modulation process，Simultaneously，Grayscale clock signal is counted by pulse modulation unit 303，And control signal to row scan control unit 304 according to capable the sweeping of count value output，Row scan control unit 304 is swept control signal output line scan signals according to this row and the multirow LED in LED high density display screen is carried out progressive scan switching，In carrying out the process progressively scanned，Multirow LED in LED high density display screen is adopted the mode turned on line by line to be scanned by row scan control unit 304.
When certain a line LED in controlling LED high density display screen turns on, the line scan signals that the output of row scan control unit 304 is corresponding with this row LED, and pulse modulation unit 303 can export the pulse-modulated signal corresponding with this row LED to constant-current driven module 100, constant-current driven module 100 exports corresponding constant-current control signal according to this pulse-modulated signal, then line scan signals and constant-current control signal are jointly to control this row LED unlatching conducting, and other each row LED are turned off.In the finish time controlling certain a line LED conducting, the shadow discharge cell 305 that disappears is to the parasitic capacitance discharge on the line of this row LED place, to reach to eliminate the purpose of the upper smear of row.nullSuch as，LED line number in LED high density display screen is 16，Then data processing module 300 has 16 row and sweeps outfan (L0～L15)，Successively the every a line LED LED high density display screen is implemented row scanning from L0 to L15，L0 exported line scan signals and constant-current driven module 100 and drove signal according to above-mentioned pulse-modulated signal output constant current so that certain a line LED of correspondence turns on before this，When grayscale clock signal is counted by clock processing unit 302，And count value is when being 1025，L0 closes，L1 opens output line scan signals and constant-current driven module 100 exports the constant-current driving signal of correspondence so that next line LED turns on，The rest may be inferred，Circulate successively from L0 to L15 and the every a line LED LED high density display screen is implemented row scanning.
Owing to row scanning constant-current driven chip is to simultaneously drive red-light LED in multiple pixel cell, green light LED and blue-ray LED, so the quantity of red-light LED that row scanning constant-current driven chip to drive is identical with the quantity of the quantity of green light LED and blue-ray LED, set this quantity as a herein.The data bits of above-mentioned HONGGUANG gradation data at the corresponding levels is n × a × m(n is data precision, such as 16bits；M is the LED line number of LED high density display screen, such as 4,8,16,32 etc.), in like manner, the data bits of green glow gradation data at the corresponding levels is n × a × m；The data bits of blue light gradation data at the corresponding levels is n × a × m.Wherein, owing to comprising red-light LED, green light LED and blue-ray LED in each pixel cell, i.e. the LED of three kinds of colors, so the total amount of data that data processing module 300 to store is n × a × m × 3.
Accordingly, because data volume is relatively big, so memorizer 301 can be specifically SRAM(StaticRandom-AccessMemory, SRAM).
For clock processing unit 302, its clock signal frequency that can be specifically conventional regulates circuit.
For pulse modulation unit 303, it can be specifically conventional PWM controller.
Embodiment two:
Fig. 5 illustrates that the row for LED high density display screen that second embodiment of the invention provides scans the structure of constant-current driven chip, every a line LED in LED high density display screen comprises multiple pixel cell, each pixel cell includes a red-light LED, a green light LED, a blue-ray LED and a white light LEDs, for the ease of explanation, illustrate only part related to the present embodiment, details are as follows:
nullOn the basis of the row scanning constant-current driven chip shown in Fig. 1，Multirow LED on LED high density display screen is implemented row scanning by row scanning constant-current driven chip shown in Fig. 5 line by line，And the multiple pixel cells in every a line LED are carried out constant-current driving simultaneously，Then the constant flow regulation port of constant-current driven module 100 includes HONGGUANG constant flow regulation port REXT_R、Green glow constant flow regulation port REXT_G、Blue light constant flow regulation port REXT_B and white light constant flow regulation port REXT_W，Constant-current driven module 100 has multiple HONGGUANG current constant control port (ROUT_0～ROUT_n)、Multiple green glows current constant control port (GOUT_0～GOUT_n)、Multiple blue lights current constant control port (BOUT_0～BOUT_n) and multiple white light current constant control port (WOUT_0～WOUT_n)，And by multiple HONGGUANG current constant control port (ROUT_0～ROUT_n)、Multiple green glows current constant control port (GOUT_0～GOUT_n)、Multiple blue lights current constant control port (BOUT_0～BOUT_n) and multiple white light current constant control port (WOUT_0～WOUT_n) export HONGGUANG constant-current control signal respectively、Green glow constant-current control signal、Blue light constant-current control signal and white light constant-current control signal are to red-light LED、Green light LED、Blue-ray LED and white light LEDs carry out constant-current driving，Each HONGGUANG current constant control port、Green glow current constant control port、Blue light current constant control port and white light current constant control port correspondence respectively drives a red-light LED、Green light LED、Blue-ray LED and white light LEDs.
The gradation data input of gradation data input module 200 includes HONGGUANG gradation data input DR, green glow gradation data input DG, blue light gradation data input DB and white light gradation data input DW；The data transfer of gradation data input module 200 includes HONGGUANG gradation data transmission end DRO, green glow gradation data transmission end DRG, blue light gradation data transmission end DRB and white light gradation data transmission end DRW；The data output end of gradation data input module 200 includes HONGGUANG gradation data outfan D1, green glow gradation data outfan D2, blue light gradation data outfan D3 and white light gradation data outfan D4；The data input pin of data processing module 300 includes HONGGUANG gradation data input DI1, green glow gradation data input DI2, blue light gradation data input DI3 and white light gradation data input DI4.
Constant-current driven chip is scanned from the above-mentioned row shown in Fig. 5, the row scanning constant-current driven chip that the present embodiment provides both can realize the function of the row scanning constant-current driven chip that first embodiment of the invention provides and (namely simultaneously drive red-light LED, green light LED and blue-ray LED), red-light LED can also be simultaneously driven, green light LED, blue-ray LED and white light LEDs, so, the row scanning constant-current driven chip that the present embodiment provides both may be used for each pixel cell of row turntable driving and comprised red-light LED, the LED high density display screen of green light LED and blue-ray LED, can be used for each pixel cell of row turntable driving and comprise red-light LED, green light LED, the LED high density display screen of blue-ray LED and white light LEDs.The mode of the LED high density display screen comprising red-light LED, green light LED and blue-ray LED due to each pixel cell of row turntable driving is mentioned in the first embodiment of the invention, so not repeating them here.The LED high density display screen only to each pixel cell, row scanning constant-current driven chip being comprised red-light LED, green light LED, blue-ray LED and white light LEDs below is implemented the mode of row turntable driving and is described in detail.
nullWherein，The HONGGUANG gradation data input DR of gradation data input module 200、Green glow gradation data input DG、Blue light gradation data input DB and white light gradation data input DW receives red-light LED gradation data respectively、Green light LED gradation data、Blue-ray LED gradation data and white light LEDs gradation data，Simultaneously，Rising edge and/or trailing edge at data clock signal，The HONGGUANG gradation data transmission end DRO of gradation data input module 200、Green glow gradation data transmission end DGO、Blue light gradation data transmission end DBO and white light gradation data transmission end DWO is respectively by red-light LED gradation data、Green light LED gradation data、Blue-ray LED gradation data and white light LEDs gradation data are sent to the row scanning constant-current driven chip of next stage，And the HONGGUANG gradation data outfan D1 of gradation data input module 200、Green glow gradation data outfan D2、Blue light gradation data outfan D3 and white light gradation data outfan D4 is respectively by red-light LED gradation data、Green light LED gradation data、Blue-ray LED gradation data and white light LEDs gradation data export to data processing module 300.
nullIn other situations，Gradation data input module 200 can only by HONGGUANG gradation data input DR serial received red-light LED gradation data、Green light LED gradation data and blue-ray LED gradation data，Simultaneously，Rising edge and/or trailing edge at data clock signal，The white light gradation data transmission end DWO of gradation data input module 200 is by red-light LED gradation data、Green light LED gradation data、Blue-ray LED gradation data and white light LEDs gradation data serially transfer the row scanning constant-current driven chip to next stage，And the HONGGUANG gradation data outfan D1 of gradation data input module 200、Green glow gradation data outfan D2、Blue light gradation data outfan D3 and white light gradation data outfan D4 is respectively by red-light LED gradation data、Green light LED gradation data、Blue-ray LED gradation data and white light LEDs gradation data export to data processing module 300.
Further, as shown in Figure 6, gradation data input module 200 includes:
First gating unit the 201, second gating unit the 202, the 3rd gating unit the 203, first shift register the 204, second shift register the 205, the 3rd shift register 206 and the 4th shift register 207；
nullThe data input pin of the first shift register 204、First data input pin of the first gating unit 201、The HONGGUANG gradation data input DR of the first data input pin of the second gating unit 202 and the first data input pin respectively gradation data input module 200 of the 3rd gating unit 203、Green glow gradation data input DG、Blue light gradation data input DB and white light gradation data input DW，The clock signal terminal of the first shift register 204 and the clock signal terminal of the second shift register 205、The clock signal terminal DCLK that common contact is gradation data input module 200 of the clock signal terminal of the 3rd shift register 206 and the clock signal terminal of the 4th shift register 207，First outfan of the first shift register 204 connects the second data input pin of the first gating unit 201，First outfan of the second shift register 205 connects the second data input pin of the second gating unit 202，First outfan of the 3rd shift register 206 connects the second data input pin of the 3rd gating unit 203，And first first outfan of shift register 204、First outfan of the second shift register 205、First outfan of the 3rd shift register 206 and the HONGGUANG gradation data transmission end DRO of the 4th shift register 207 respectively gradation data input module 200、Green glow gradation data transmission end DGO、Blue light gradation data transmission end DBO and white light gradation data transmission end DWO，Second outfan of the first shift register 204、Second outfan of the second shift register 205、The HONGGUANG gradation data outfan D1 of the second outfan of the 3rd shift register 206 and the second outfan respectively gradation data input module 200 of the 4th shift register 207、Green glow gradation data outfan D2、Blue light gradation data outfan D3 and white light gradation data outfan D4，The outfan of the first gating unit 201 and the outfan of the second gating unit 202 and the outfan of the 3rd gating unit 203 connect the data input pin of the second shift register 205 respectively、The data input pin of the 3rd shift register 206 and the outfan of the 4th shift register 207.
nullWherein，The data input pin of the first shift register 204、First data input pin of the first gating unit 201、First data input pin of the second gating unit 202 and the first data input pin of the 3rd gating unit 203 receive red-light LED gradation data respectively、Green light LED gradation data、Blue-ray LED gradation data and white light LEDs gradation data，Second data input pin of the first gating unit 201、Second data input pin of the second gating unit 202 and the second data input pin of the 3rd gating unit 203 are turned off，So at the rising edge of data clock signal and/or trailing edge，First gating unit 201、Second gating unit 202 and the 3rd gating unit 203 are respectively by green light LED gradation data、Blue-ray LED gradation data and white light LEDs gradation data export to the second shift register 205、3rd shift register 206 and the 4th shift register 207，Then the first shift register 204、Second shift register 205、3rd shift register 206 and the 4th shift register 207 are respectively by red-light LED gradation data、Green light LED gradation data、Blue-ray LED gradation data and white light LEDs gradation data send the row scanning constant-current driven chip of next stage to，And export to data processing module 300 simultaneously.
nullIn other situations，First data input pin of the first gating unit 201、First data input pin of the second gating unit 202 and the first data input pin of the 3rd gating unit 203 are turned off，The data input pin serial received red-light LED gradation data of the first shift register 204、Green light LED gradation data、Blue-ray LED gradation data and white light LEDs gradation data，Rising edge and/or trailing edge at data clock signal，First shift register 204 passes through its first outfan by red-light LED gradation data、Green light LED gradation data、Blue-ray LED gradation data and white light LEDs gradation data are transferred to the first gating unit 201，First gating unit 201 is by red-light LED gradation data、Green light LED gradation data、Blue-ray LED gradation data and white light LEDs gradation data export to the second shift register 205，Second shift register 205 again through its first outfan by red-light LED gradation data、Green light LED gradation data and blue-ray LED gradation data and white light LEDs gradation data are transferred to the second gating module 202，Second gating module 202 is by red-light LED gradation data、Green light LED gradation data、Blue-ray LED gradation data and white light LEDs gradation data export to the 3rd shift register 206，3rd shift register 206 passes through its first outfan by red-light LED gradation data、Green light LED gradation data、Blue-ray LED gradation data and white light LEDs gradation data are transferred to the 3rd gating unit 203，3rd gating unit 203 is by red-light LED gradation data、Green light LED gradation data、Blue-ray LED gradation data and white light LEDs gradation data export to the 4th shift register 207，Then the first outfan of the 4th shift register 207 is by red-light LED gradation data、Green light LED gradation data、Blue-ray LED gradation data and white light LEDs gradation data serially transfer the row scanning constant-current driven chip to next stage，Meanwhile，Second outfan of the first shift register 204、Second outfan of the second shift register 205、Second outfan of the 3rd shift register 206 and the second outfan of the 4th shift register 207 are respectively by red-light LED gradation data、Green light LED gradation data、Blue-ray LED gradation data and white light LEDs gradation data export to data processing module 300.
For data processing module 300, as shown in Figure 5, the row of data processing module 300 is swept outfan L_OUT and is included multiple row and sweep outfan (L0～Ln), it is consistent with the line number of the multirow LED in LED high density display screen that the plurality of row sweeps the quantity of outfan (L0～Ln), when entering line scans, each row is swept the line scan signals that outfan exports and is controlled each pixel cell in every a line LED and first turn on and close afterwards.
The red-light LED gradation data that gradation data input module 200 is exported by data processing module 300 according to data latch control signal, green light LED gradation data, HONGGUANG gradation data at the corresponding levels in blue-ray LED gradation data and white light LEDs gradation data, green glow gradation data at the corresponding levels, blue light gradation data at the corresponding levels and white light gradation data at the corresponding levels store, and according to grayscale clock signal and HONGGUANG gradation data at the corresponding levels, green glow gradation data at the corresponding levels, LED high density display screen is implemented row scanning by blue light gradation data at the corresponding levels and white light gradation data output line scan signals at the corresponding levels, also correspondingly export red-light LED switching signal simultaneously, green light LED switching signal, blue-ray LED switching signal and white light LEDs switching signal are to constant-current driven module 100.
Further, as it is shown in fig. 7, data processing module 300 includes memorizer 301, clock processing unit 302, pulse modulation unit 303, row scan control unit 304 and the shadow discharge cell 305 that disappears.
nullThe first input end of memorizer 301、Second input、The HONGGUANG gradation data input DI1 of the 3rd input and four-input terminal respectively data processing module 300、Green glow gradation data input DI2、Blue light gradation data input DI3 and white light gradation data input DI4，And the first input end of memorizer 301、Second input、3rd input and four-input terminal receive red-light LED gradation data respectively、Green light LED gradation data、Blue-ray LED gradation data and white light LEDs gradation data，The latch signal end LE that control end is data processing module 300 of memorizer 301，The outfan of memorizer 301 connects the data input pin of pulse modulation unit 303，The input of clock processing unit 302 is the grayscale clock end GCLK of data processing module 300，First outfan of clock processing unit 302 connects the input end of clock of pulse modulation unit 303，The outfan of pulse modulation unit 303 is the outfan OUT of data processing module 300，Second outfan of clock processing unit 302 is connected with the input of row scan control unit 304 and the input of the shadow discharge cell 305 that disappears，Multiple row of multiple outfans of row scan control unit 304 respectively data processing module 300 sweep outfan (L0～Ln)，The multiple outfans of shadow discharge cell 305 of disappearing connect respectively multiple outfans of row scan control unit 304 correspondingly.
nullWherein，When data latch control signal effectively (such as Low level effective)，Memorizer 301 is by received red-light LED gradation data、Green light LED gradation data、HONGGUANG gradation data at the corresponding levels in blue-ray LED gradation data and white light LEDs gradation data、Green glow gradation data at the corresponding levels、Blue light gradation data at the corresponding levels and white light gradation data at the corresponding levels store，Grayscale clock signal is carried out the modulation clock signal that output frequency after frequency adjustment is different from grayscale clock signal by clock processing unit 302，Pulse modulation unit 303 according to modulation clock signal to HONGGUANG gradation data at the corresponding levels、Green glow gradation data at the corresponding levels、Blue light gradation data at the corresponding levels and white light gradation data at the corresponding levels obtain corresponding pulse-modulated signal as LED switch signal output to constant-current driven module 100 after carrying out impulse modulation process，Simultaneously，Grayscale clock signal is counted by pulse modulation unit 303，And control signal to row scan control unit 304 according to capable the sweeping of count value output，Row scan control unit 304 is swept control signal output line scan signals according to this row and the multirow LED in LED high density display screen is carried out progressive scan switching，In carrying out the process progressively scanned，Multirow LED in LED high density display screen is adopted the mode turned on line by line to be scanned by row scan control unit 304.
When certain a line LED in controlling LED high density display screen turns on, the line scan signals that the output of row scan control unit 304 is corresponding with this row LED, and pulse modulation unit 303 can export the pulse-modulated signal corresponding with this row LED to constant-current driven module 100, constant-current driven module 100 exports corresponding constant-current control signal according to this pulse-modulated signal, then line scan signals and constant-current control signal are jointly to control this row LED unlatching conducting, and other each row LED are turned off.In the finish time controlling certain a line LED conducting, the shadow discharge cell 305 that disappears is to the parasitic capacitance discharge on the line of this row LED place, to reach to eliminate the purpose of the upper smear of row.nullSuch as，LED line number in LED high density display screen is 16，Then data processing module 300 has 16 row and sweeps outfan (L0～L15)，Successively the every a line LED LED high density display screen is implemented row scanning from L0 to L15，L0 exported line scan signals and constant-current driven module 100 and drove signal according to above-mentioned pulse-modulated signal output constant current so that certain a line LED of correspondence turns on before this，When grayscale clock signal is counted by clock processing unit 302，And count value is when being 1025，L0 closes，L1 opens output line scan signals and constant-current driven module 100 exports the constant-current driving signal of correspondence so that next line LED turns on，The rest may be inferred，Circulate successively from L0 to L15 and the every a line LED LED high density display screen is implemented row scanning.
Owing to row scanning constant-current driven chip is to simultaneously drive red-light LED in multiple pixel cell, green light LED, blue-ray LED and white light LEDs, so the quantity of the quantity of red-light LED to drive of row scanning constant-current driven chip and the quantity of green light LED, the quantity of blue-ray LED and white light LEDs is identical, set this quantity as a herein.The data bits of above-mentioned HONGGUANG gradation data at the corresponding levels is n × a × m(n is data precision, such as 16bits；M is the LED line number of LED high density display screen, such as 4,8,16,32 etc.), in like manner, the data bits of green glow gradation data at the corresponding levels is n × a × m；The data bits of blue light gradation data at the corresponding levels is n × a × m；The data bits of white light gradation data at the corresponding levels is n × a × m.Wherein, owing to comprising red-light LED, green light LED, blue-ray LED and white light LEDs in each pixel cell, i.e. the LED of four kinds of colors, so the total amount of data that data processing module 300 to store is n × a × m × 4.
Accordingly, because data volume is relatively big, so memorizer 301 can be specifically SRAM.
For clock processing unit 302, its clock signal frequency that can be specifically conventional regulates circuit.
For pulse modulation unit 303, it can be specifically conventional PWM controller.
In other embodiments of the present invention, if each pixel cell in the required LED high density display screen driven of row scanning constant-current driven chip also comprises the LED of other colors being different from red-light LED, green light LED, blue-ray LED and white light LEDs, can set that the quantity of the LED being comprised multiple different colours in pixel cell is b, then the total amount of data of the required storage of memorizer 301 in first embodiment of the invention and the second embodiment is n × a × m × b.
The embodiment of the present invention includes the row scanning constant-current driven chip for LED high density display screen of gradation data input module, data processing module and constant-current driven module by adopting, multiple gradation datas are received according to data clock signal by gradation data input module, and the row that the plurality of gradation data is sent to next stage scans constant-current driven chip, and simultaneously by the plurality of gradation data output to data processing module；Gradation datas multiple at the corresponding levels in multiple gradation datas are stored by data processing module according to data latch control signal, and export line scan signals according to multiple gradation datas and grayscale clock signal and the multirow LED in LED high density display screen implements row scanning line by line and exports corresponding multiple LED switch signal to constant-current driven module；Constant-current driven module correspondingly exports multiple constant-current control signal according to multiple LED switch signals and drives the LED of the different colours that every a line LED comprises in LED high density display screen luminous, reach a row scanning constant-current driven chip and multirow LED has been realized row scanning switching and the purpose driven, advantageously reduce the quantity of chip and reduce the wiring difficulty of pcb board, it is suitable in LED high density display screen, and is favorably improved the display effect of LED high density display screen.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (4)
1., for a row scanning constant-current driven chip for LED high density display screen, including constant-current driven module, the multirow LED in LED high density display screen is carried out constant-current driving according to LED switch signal output constant current control signal by described constant-current driven module；It is characterized in that:
Described row scanning constant-current driven chip also includes gradation data input module and data processing module；
Gradation data input and the data clock end of described gradation data input module are respectively connected to multiple gradation data and data clock signal, the data transfer of described gradation data input module exports the plurality of gradation data, the data output end of described gradation data input module connects the data input pin of described data processing module, latch signal end and the grayscale clock end of described data processing module are respectively connected to data latch control signal and grayscale clock signal, the outfan of described data processing module connects the switch signal input end of described constant-current driven module, the row of described data processing module sweeps outfan output line scan signals；
Described gradation data input module receives the plurality of gradation data according to described data clock signal, and the row that the plurality of gradation data is sent to next stage scans constant-current driven chip, and simultaneously by the plurality of gradation data output to described data processing module；Gradation data multiple at the corresponding levels in the plurality of gradation data is stored by described data processing module according to described data latch control signal, and implements line by line go scanning and export corresponding multiple LED switch signal extremely described constant-current driven module to the multirow LED in LED high density display screen according to the plurality of gradation data and described grayscale clock signal output line scan signals；Described constant-current driven module correspondingly exports multiple constant-current control signal according to the plurality of LED switch signal and drives the LED of the different colours that every a line LED comprises in described LED high density display screen luminous；
The constant flow regulation port of described constant-current driven module at least includes HONGGUANG constant flow regulation port, green glow constant flow regulation port and blue light constant flow regulation port, described constant-current driven module at least has multiple HONGGUANG current constant control port, multiple green glow current constant control ports and multiple blue light current constant control port, and at least through multiple described HONGGUANG current constant control ports, multiple described green glow current constant control ports and multiple described blue light current constant control port export HONGGUANG constant-current control signal respectively, green glow constant-current control signal and blue light constant-current control signal are to red-light LED, green light LED and blue-ray LED carry out constant-current driving；
The gradation data input of described gradation data input module at least includes HONGGUANG gradation data input, green glow gradation data input and blue light gradation data input；The data transfer of described gradation data input module at least includes HONGGUANG gradation data transmission end, green glow gradation data transmission end and blue light gradation data transmission end；The data output end of described gradation data input module at least includes HONGGUANG gradation data outfan, green glow gradation data outfan and blue light gradation data outfan；
The data input pin of described data processing module at least includes HONGGUANG gradation data input, green glow gradation data input and blue light gradation data input；The row of described data processing module is swept outfan and is included multiple row and sweep outfan, and it is consistent with the line number of the multirow LED in described LED high density display screen that the plurality of row sweeps the quantity of outfan；
Described data processing module includes memorizer, clock processing unit, pulse modulation unit, row scan control unit and the shadow discharge cell that disappears；nullThe first input end of described memorizer、The HONGGUANG gradation data input of the second input and the 3rd input respectively described data processing module、Green glow gradation data input and blue light gradation data input，And the first input end of described memorizer、Second input and the 3rd input receive described red-light LED gradation data respectively、Described green light LED gradation data and described blue-ray LED gradation data，The latch signal end that control end is described data processing module of described memorizer，The outfan of described memorizer connects the data input pin of described pulse modulation unit，The grayscale clock end that input is described data processing module of described clock processing unit，First outfan of described clock processing unit connects the input end of clock of described pulse modulation unit，The outfan of described pulse modulation unit is the outfan of described data processing module，The input of the second outfan of described clock processing unit and described row scan control unit and described in the disappear input of shadow discharge cell be connected，Multiple row of multiple outfans respectively described data processing module of described row scan control unit sweep outfan，Multiple outfans of the described shadow discharge cell that disappears connect multiple outfans of described row scan control unit respectively correspondingly.
null2. row scanning constant-current driven chip as claimed in claim 1，It is characterized in that，The HONGGUANG gradation data input of described gradation data input module、Green glow gradation data input and blue light gradation data input receive red-light LED gradation data respectively、Green light LED gradation data and blue-ray LED gradation data，Simultaneously，Rising edge and/or trailing edge at described data clock signal，The HONGGUANG gradation data transmission end of described gradation data input module、Green glow gradation data transmission end and blue light gradation data transmission end are respectively by described red-light LED gradation data、Described green light LED gradation data and described blue-ray LED gradation data are sent to the row scanning constant-current driven chip of next stage，And the HONGGUANG gradation data outfan of described gradation data input module、Green glow gradation data outfan and blue light gradation data outfan are respectively by described red-light LED gradation data、Described green light LED gradation data and described blue-ray LED gradation data output extremely described data processing module.
null3. row scanning constant-current driven chip as claimed in claim 1，It is characterized in that，Described gradation data input module is only by red-light LED gradation data described in HONGGUANG gradation data input serial received、Described green light LED gradation data and described blue-ray LED gradation data，Simultaneously，Rising edge and/or trailing edge at described data clock signal，The blue light gradation data transmission end of described gradation data input module is by described red-light LED gradation data、Described green light LED gradation data and described blue-ray LED gradation data serially transfer the row scanning constant-current driven chip to next stage，And the HONGGUANG gradation data outfan of described gradation data input module、Green glow gradation data outfan and blue light gradation data outfan are respectively by described red-light LED gradation data、Described green light LED gradation data and described blue-ray LED gradation data output extremely described data processing module.
4. row scanning constant-current driven chip as claimed in claim 1, it is characterised in that described gradation data input module includes:
First gating unit, the second gating unit, the first shift register, the second shift register and the 3rd shift register；
nullThe data input pin of described first shift register、The HONGGUANG gradation data input of the first data input pin of described first gating unit and the first data input pin of described second gating unit respectively described gradation data input module、Green glow gradation data input and blue light gradation data input，The clock signal terminal of described first shift register、The clock signal terminal that common contact is described gradation data input module of the clock signal terminal of described second shift register and the clock signal terminal of described 3rd shift register，First outfan of described first shift register connects the second data input pin of described first gating unit，First outfan of described second shift register connects the second data input pin of described second gating unit，And the first outfan of described first shift register、The HONGGUANG gradation data transmission end of the first outfan of described second shift register and the first outfan respectively described gradation data input module of described 3rd shift register、Green glow gradation data transmission end and blue light gradation data transmission end，Second outfan of described first shift register、The HONGGUANG gradation data outfan of the second outfan of described second shift register and the second outfan respectively described gradation data input module of described 3rd shift register、Green glow gradation data outfan and blue light gradation data outfan，The outfan of described first gating unit and the outfan of described second gating unit connect the data input pin of described second shift register and the data input pin of described 3rd shift register respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410132499.1A CN103943068B (en) | 2014-04-01 | 2014-04-01 | Row scanning constant-current driven chip for LED high density display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410132499.1A CN103943068B (en) | 2014-04-01 | 2014-04-01 | Row scanning constant-current driven chip for LED high density display screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103943068A CN103943068A (en) | 2014-07-23 |
| CN103943068B true CN103943068B (en) | 2016-07-06 |
Family
ID=51190705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410132499.1A Active CN103943068B (en) | 2014-04-01 | 2014-04-01 | Row scanning constant-current driven chip for LED high density display screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103943068B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161053B (en) * | 2015-09-11 | 2017-08-11 | 深圳市明微电子股份有限公司 | A kind of anti-smear row sweeps control chip and anti-smear LED display circuit |
| 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 |
| CN113178166A (en) * | 2021-04-08 | 2021-07-27 | Tcl华星光电技术有限公司 | LED panel and driving method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1348579A (en) * | 1999-03-24 | 2002-05-08 | 埃维克斯公司 | Full color LED display system |
| JP3313830B2 (en) * | 1993-07-19 | 2002-08-12 | パイオニア株式会社 | Display device drive circuit |
| CN102421216A (en) * | 2010-09-28 | 2012-04-18 | 深圳市长运通光电技术有限公司 | LED (Light-Emitting Diode) array scanning chip, LED device and LED scanning circuit |
| CN102779480A (en) * | 2012-08-17 | 2012-11-14 | 深圳市易事达电子有限公司 | Display screen drive circuit and light-emitting diode display device |
| CN202549251U (en) * | 2012-02-27 | 2012-11-21 | 深圳市明微电子股份有限公司 | Blanking control circuit for LED display screen and LED driving chip |
| CN203179469U (en) * | 2013-01-08 | 2013-09-04 | 深圳市易事达电子股份有限公司 | LED panel scanning line blanking circuit |
| CN203760051U (en) * | 2014-04-01 | 2014-08-06 | 深圳市明微电子股份有限公司 | Line-scanning constant-current drive control chip for LED (light emitting diode) high-density display screen |
-
2014
- 2014-04-01 CN CN201410132499.1A patent/CN103943068B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3313830B2 (en) * | 1993-07-19 | 2002-08-12 | パイオニア株式会社 | Display device drive circuit |
| CN1348579A (en) * | 1999-03-24 | 2002-05-08 | 埃维克斯公司 | Full color LED display system |
| CN102421216A (en) * | 2010-09-28 | 2012-04-18 | 深圳市长运通光电技术有限公司 | LED (Light-Emitting Diode) array scanning chip, LED device and LED scanning circuit |
| CN202549251U (en) * | 2012-02-27 | 2012-11-21 | 深圳市明微电子股份有限公司 | Blanking control circuit for LED display screen and LED driving chip |
| CN102779480A (en) * | 2012-08-17 | 2012-11-14 | 深圳市易事达电子有限公司 | Display screen drive circuit and light-emitting diode display device |
| CN203179469U (en) * | 2013-01-08 | 2013-09-04 | 深圳市易事达电子股份有限公司 | LED panel scanning line blanking circuit |
| CN203760051U (en) * | 2014-04-01 | 2014-08-06 | 深圳市明微电子股份有限公司 | Line-scanning constant-current drive control chip for LED (light emitting diode) high-density display screen |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103943068A (en) | 2014-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105575333B (en) | OLED display and source electrode driver | |
| CN104751787B (en) | Organic LED display device and its driving method | |
| US20210358388A1 (en) | Pixel driving circuit and display device | |
| CN104978926A (en) | Pixel control circuit | |
| CN108335667A (en) | Oled display panel and display device | |
| US8773414B2 (en) | Driving circuit of light emitting diode and ghost phenomenon elimination circuit thereof | |
| US20160365057A1 (en) | Liquid crystal display panel and driving method thereof | |
| CN104464618B (en) | AMOLED drive device and drive method | |
| CN106683635B (en) | RGBW display panel, drive circuit structure | |
| CN103943068B (en) | Row scanning constant-current driven chip for LED high density display screen | |
| KR20170028623A (en) | Image Display Apparatus and Driving Method Thereof | |
| CN107452335A (en) | A kind of pixel-driving circuit machine driving method, OLED display panel | |
| TWI737072B (en) | Driving device of display pixel and driving method thereof | |
| CN105957471A (en) | Color temperature adjustable display system and color temperature adjusting method | |
| CN203760051U (en) | Line-scanning constant-current drive control chip for LED (light emitting diode) high-density display screen | |
| Guan et al. | 17‐3: A Novel Pixel‐level Local Dimming Backlight System for HDR Display Based on mini‐LED | |
| CN103927986B (en) | A kind of LED high density display screen constant-current driven chip | |
| CN104505022B (en) | A kind of indoor LED display driving method of high density and LED driver | |
| CN102768820B (en) | LED large screen display device and driving circuit and driving method thereof | |
| CN214671739U (en) | Column driving chip-based dynamic scanning system of common-anode LED display screen | |
| US9099044B2 (en) | Apparatus and method for driving light emitting diode | |
| CN203760052U (en) | LED high-density display screen constant-current driving control chip | |
| US7502004B2 (en) | Driving method of FS-LCD | |
| CN106782296A (en) | Display screen and its control method, device and system | |
| US8179407B2 (en) | Method of driving a display apparatus, and display apparatus and timing controller for performing the method |
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 |