CN110853534A - P2.5 LED full-color display module with 80X90 special resolution and swept by 1/45 - Google Patents
P2.5 LED full-color display module with 80X90 special resolution and swept by 1/45 Download PDFInfo
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- CN110853534A CN110853534A CN201911280830.3A CN201911280830A CN110853534A CN 110853534 A CN110853534 A CN 110853534A CN 201911280830 A CN201911280830 A CN 201911280830A CN 110853534 A CN110853534 A CN 110853534A
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- 239000011324 bead Substances 0.000 claims description 21
- 230000005540 biological transmission Effects 0.000 claims description 18
- 230000003321 amplification Effects 0.000 claims description 13
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 13
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000011049 pearl Substances 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 230000002688 persistence Effects 0.000 abstract description 2
- 230000000007 visual effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
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- 238000003384 imaging method Methods 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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Abstract
The P2.5 LED full-color display module with the specific resolution of 80X90 scanned by 1/45 has the resolution of 80X90, and if 90 lines are displayed line by line, the visual persistence time of human eyes can be exceeded, so that the 90 lines are divided into an upper group and a lower group to be scanned line by line, the upper 45 lines and the lower 45 lines are scanned line by line, and RGB signals are divided into two paths to respectively control the upper group and the lower group; 1/45 the scanning mode adopts ICN2065 chip supporting 1-64 scanning arbitrary scanning to realize parallel scanning every 45 lines, two paths of RGB signals respectively select the 1 st line and the 46 th line to scan line by line, the period is short and the refresh rate is high. One path of RGB signals needs 3 ICN2065 chips to be received, the P2.5 full-color LED display module has 80 rows, the ICN2065 chip has 16 PWM constant-current output ports, and only 30 ICN2065 chips are needed. The invention adopts the ICN2065 chip supporting 1-64 scanning arbitrary scanning to realize 1/45 scanning mode, which is much less than the traditional ICN2053 chip supporting 1-32 scanning arbitrary scanning in the number of driving ICs, thereby greatly improving the heat dissipation capability and improving the refresh rate.
Description
The technical field is as follows:
the invention relates to an 1/45 swept P2.5 LED full-color display module with a special resolution of 80X 90.
Background art:
along with the improvement of the manufacturing technology of the LED display screen, the resolution ratio of the traditional LED display screen is greatly improved, and meanwhile, the development of the indoor small-space LED display screen is driven. The screen with the point spacing below P2.5 is generally called an indoor small-spacing LED display screen, the P2.5 point spacing belongs to indoor display screens commonly used in the industry, and the screen is configured at the middle and high ends, has stable performance and good flatness, is spliced seamlessly, can perfectly express high-definition image quality and fine color, and can be comparable to an LCD to a certain extent.
At present, the existing P2.5 display module mostly adopts two technical parameters of 64X32 resolution of 1/16 scanning and 128X64 resolution of 1/32 scanning, and when a P2.5 display screen is designed and spliced, due to the limitation of specification and size, compression loss and blurring phenomena exist in graphic imaging.
The invention content is as follows:
the invention provides an 1/45 scanning P2.5 LED full-color display module with a special resolution of 80X90 to solve the problems in the prior art. The invention provides multidirectional selection for design splicing, improves the scanning frequency of the display module on the basis of the prior art, improves the display effect and provides specification selection for customizing various display screens.
The technical scheme adopted by the invention is as follows: an 1/45 swept P2.5 LED full-color display module with 80X90 special resolution comprises a lamp face, a PCB and a driving face, wherein the lamp face and the driving face are respectively arranged on the upper end face and the lower end face of the PCB,
the lamp surface is formed by arranging full-color RGB lamp beads on the upper end face of a PCB in a matrix mode, the number of the transverse full-color RGB lamp beads of the lamp surface is 80, the number of the longitudinal full-color RGB lamp beads is 90, and a display module with the resolution ratio of 80X90 is formed, the display module is divided into two groups of modules with 45 lines and scans line by line in parallel, the two groups of modules with 45 lines and 45 lines respectively receive one path of RGB signals, and the 1 st line and the 46 th line in the two groups of modules are respectively selected by the two paths of RGB signals simultaneously and scanned line by line in parallel;
the driving surface comprises a transmission interface, a signal amplification module, a row driving module and a column driving module, the transmission interface receives an external control signal and transmits the external control signal to the signal amplification module, and the signal amplification module transmits a row control signal and a column control signal in the external control signal to the row driving module and the column driving module respectively;
the column driving module comprises 30 ICN2065 chips, each 15 ICN2065 chips form one group, and cathode pull-down currents are respectively provided for RGB lamp beads in the two groups of modules of the upper 45 rows and the lower 45 rows correspondingly;
the line driving module comprises 12 HX6058 chips, and each 6 HX6058 chips are in one group and respectively and correspondingly provide anode power supply voltage for RGB lamp beads in two groups of modules of an upper 45 line and a lower 45 line;
the signal amplification module adopts a 74HC245 chip, and the 74HC245 chip amplifies an external control signal received by the transmission interface and correspondingly transmits the amplified external control signal to the column driving module and the row driving module;
the transmission interface comprises two HUB75 interfaces, and the HUB75 interface receives external control signals and transmits the signals to the 74HC245 chip.
Further, each ICN2065 chip in the column driving module includes a SIN port, an SDO port, a REXT port, a VDD port, and 16 PWM constant current output ports.
Furthermore, 15 ICN2065 chips in the two groups of modules of the upper 45 rows and the lower 45 rows are respectively taken as one level according to 3 chips in each row and are correspondingly divided into 5 levels, and the one-level ICN2065 chips in the two groups of modules of the upper 45 rows and the lower 45 rows correspondingly control 16 rows of full-color RGB lamp beads.
Furthermore, the SIN ports of the first-level ICN2065 chips in the two groups of modules in the upper 45 rows and the lower 45 rows respectively receive RGB serial data signals sent from the 74HC245 chip; the SDO port in the first-level ICN2065 chip is connected with the SIN port of the next-level ICN2065 chip to realize data transmission;
16 PWM constant current output ports of each ICN2065 chip provide cathode pull-down current for 16 columns of lamp beads; the REXT port of each ICN2065 chip is externally connected with a current-limiting resistor to control the luminous brightness of the LED; and a VDD port of each ICN2065 chip is externally connected with a decoupling capacitor to play a role in filtering.
Further, the capacitance value of the decoupling capacitor is 0.1 uf.
Furthermore, each HX6058 chip in the row driving module has 8 current output ports, and one current output port provides anode supply voltage for 80 full-color RGB beads in a horizontal row in the lamp surface.
The invention has the following beneficial effects:
the invention adopts the ICN2065 chip supporting 1-64 scanning arbitrary scanning to realize 1/45 scanning mode, which is much less than the traditional ICN2053 chip supporting 1-32 scanning arbitrary scanning in the number of driving ICs, thereby greatly improving the heat dissipation capability and improving the refresh rate.
Description of the drawings:
fig. 1 is a schematic structural view of a driving surface of a P2.5 module.
FIG. 2 is a schematic diagram of the electrical connections of ICN2065 (pin connections are omitted and numbers are used instead of pin connections, i.e., R1N1 in the 74HC245 chip is adjacent to R1N1 in the ICN2065 chip, and the rest numbers are the same).
FIG. 3 is a schematic diagram of the driving IC circuit connection.
FIG. 4 is a timing diagram of data transmission of the LED display screen.
FIG. 5 is a schematic diagram of a hierarchy of ICN2065 chips in two sets of modules.
Fig. 6 is a schematic diagram of the transmission principle of two RGB signals.
The specific implementation mode is as follows:
the invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 6, the P2.5 LED full-color display module with 80X90 specific resolution scanned by 1/45 of the invention comprises a lamp surface, a PCB and a driving surface, wherein the lamp surface and the driving surface are respectively arranged on the upper end surface and the lower end surface of the PCB.
The full-color RGB lamp beads on the lamp surface are arranged on the upper end face of the PCB in a matrix mode, the number of the full-color RGB lamp beads on the lamp surface is 80, the number of the full-color RGB lamp beads on the lamp surface is 90, the display module with the resolution ratio of 80X90 is formed, the display module is divided into two groups of modules with 45 rows and 45 rows in parallel and scans line by line, the two groups of modules with the 45 rows and the 45 rows in parallel respectively receive one path of RGB signals, and the 1 st row and the 46 th row in the two groups of modules are respectively and simultaneously selected by the two paths of RGB signals to be scanned in parallel and.
The driving surface comprises a transmission interface, a signal amplification module, a row driving module and a column driving module, the transmission interface receives an external control signal and transmits the external control signal to the signal amplification module, and the signal amplification module transmits the row control signal and the column control signal in the external control signal to the row driving module and the column driving module respectively.
The column driving module comprises 30 ICN2065 chips, and the ICN2065 chips support 1-64 scanning. Every 15 ICN2065 chips are in one group, and the cathode pull-down current is respectively provided for RGB lamp beads in the two groups of modules of the upper 45 rows and the lower 45 rows.
The line driving module comprises 12 HX6058 chips, each 6 HX6058 chips are in one group and respectively provide anode power supply voltage for RGB lamp beads in the two groups of modules of the upper 45 lines and the lower 45 lines correspondingly.
The signal amplification module adopts a 74HC245 chip, and the 74HC245 chip correspondingly transmits the external control signal received by the transmission interface to the column driving module and the row driving module after amplification processing.
Each ICN2065 chip in the column driver module includes a SIN port, an SDO port, a REXT port, a VDD port, and 16 PWM constant current output ports.
15 ICN2065 chips in two sets of modules of 45 upper lines and 45 lower lines are all according to 3 in each row for one-level and correspond and divide into 5 levels, and 16 full-color RGB lamp pearls of row are correspondingly controlled to one-level ICN2065 chip in two sets of modules of 45 upper lines and 45 lower lines.
The SIN ports in the first-level ICN2065 chips in the two groups of modules of the upper 45 rows and the lower 45 rows respectively receive RGB serial data signals sent by a 74HC245 chip; the SDO port in the first-level ICN2065 chip is connected with the SIN port of the next-level ICN2065 chip to realize data transmission; 16 PWM constant current output ports of each ICN2065 chip provide cathode pull-down current for 16 columns of lamp beads; the REXT port of each ICN2065 chip is externally connected with a current limiting resistor to control the luminous brightness of the LED, and the resistance value of the current limiting resistor is determined according to the debugging result. And a VDD port of each ICN2065 chip is externally connected with a decoupling capacitor to play a role in filtering, and the capacitance value of the decoupling capacitor is 0.1 uf.
Each HX6058 chip in the row driving module has 8 current output ports, and one current output port provides anode power supply voltage for 80 full-color RGB lamp beads in a transverse row in the lamp surface.
The column driving module of the present invention can also use HX6158 chip or HX5958 chip.
The 74HC245 chip comprises a DIR port, A0-A7 ports and B0-B7 ports, wherein the DIR port is grounded, and data output by the transmission interface flows out from the B port receiving A port.
The transmission interface comprises two HUB75 interfaces, an input interface is arranged near the 74HC245 chip end, and the input interface receives control signals sent by an external control card and transmits the control signals to the B port of the 74HC245 chip. The HUB75 output interface is connected with the HUB75 input interface of the next cell board through a flat cable.
The resolution of the P2.5 full-color LED display module is 80X90, if 90 lines are displayed line by line, the visual persistence time of human eyes can be exceeded, so that the 90 lines are divided into an upper group and a lower group to be scanned line by line, the upper 45 lines and the lower 45 lines are scanned line by line, and RGB signals are divided into two paths to respectively control the upper group and the lower group; 1/45 the scanning mode adopts ICN2065 chip supporting 1-64 scanning arbitrary scanning to realize parallel scanning every 45 lines, two paths of RGB signals respectively select the 1 st line and the 46 th line to scan line by line, the period is short and the refresh rate is high.
One path of RGB signals needs 3 ICN2065 chips to be received, the P2.5 full-color LED display module has 80 rows, the ICN2065 chip has 16 PWM constant-current output ports, and only 30 ICN2065 chips are needed.
The invention adopts the ICN2065 chip supporting 1-64 scanning arbitrary scanning to realize 1/45 scanning mode, which is much less than the traditional ICN2053 chip supporting 1-32 scanning arbitrary scanning in the number of driving ICs, thereby greatly improving the heat dissipation capability and improving the refresh rate.
If the conventional ICN2053 chip is used for driving, the maximum scan mode can only support 1/32, 90 rows need to be divided into 3 groups, only the 1/30 scan mode can be realized, and the driving ICs need to use (96/16) × 3= 54.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (6)
1. The utility model provides a full-color display module assembly of P2.5 LED of 80X90 special resolution ratio that 1/45 swept, includes lamp face, PCB board and driving surface, lamp face and driving surface set up respectively on the terminal surface about the PCB board, its characterized in that:
the lamp surface is formed by arranging full-color RGB lamp beads on the upper end face of a PCB in a matrix mode, the number of the transverse full-color RGB lamp beads of the lamp surface is 80, the number of the longitudinal full-color RGB lamp beads is 90, and a display module with the resolution ratio of 80X90 is formed, the display module is divided into two groups of modules with 45 lines and scans line by line in parallel, the two groups of modules with 45 lines and 45 lines respectively receive one path of RGB signals, and the 1 st line and the 46 th line in the two groups of modules are respectively selected by the two paths of RGB signals simultaneously and scanned line by line in parallel;
the driving surface comprises a transmission interface, a signal amplification module, a row driving module and a column driving module, the transmission interface receives an external control signal and transmits the external control signal to the signal amplification module, and the signal amplification module transmits a row control signal and a column control signal in the external control signal to the row driving module and the column driving module respectively;
the column driving module comprises 30 ICN2065 chips, each 15 ICN2065 chips form one group, and cathode pull-down currents are respectively provided for RGB lamp beads in the two groups of modules of the upper 45 rows and the lower 45 rows correspondingly;
the line driving module comprises 12 HX6058 chips, and each 6 HX6058 chips are in one group and respectively and correspondingly provide anode power supply voltage for RGB lamp beads in two groups of modules of an upper 45 line and a lower 45 line;
the signal amplification module adopts a 74HC245 chip, and the 74HC245 chip amplifies an external control signal received by the transmission interface and correspondingly transmits the amplified external control signal to the column driving module and the row driving module;
the transmission interface comprises two HUB75 interfaces, and the HUB75 interface receives external control signals and transmits the signals to the 74HC245 chip.
2. The 1/45 swept P2.5 LED full color display module with 80X90 specific resolution as set forth in claim 1, wherein: each ICN2065 chip in the column driver module includes a SIN port, an SDO port, a REXT port, a VDD port, and 16 PWM constant current output ports.
3. The 1/45 swept P2.5 LED full color display module with 80X90 specific resolution as set forth in claim 2, wherein: 15 ICN2065 chips in two sets of modules of 45 upper lines and 45 lower lines all are according to every 3 and are one-level and divide into 5 levels correspondingly, and 16 full-color RGB lamp pearls of row are controlled correspondingly to one-level ICN2065 chip in two sets of modules of 45 upper lines and 45 lower lines.
4. The 1/45 swept P2.5 LED full color display module with 80X90 specific resolution as set forth in claim 2, wherein: the SIN ports in the first-level ICN2065 chips in the two groups of modules of the upper 45 rows and the lower 45 rows respectively receive RGB serial data signals sent by 74HC245 chips; the SDO port in the first-level ICN2065 chip is connected with the SIN port of the next-level ICN2065 chip to realize data transmission;
16 PWM constant current output ports of each ICN2065 chip provide cathode pull-down current for 16 columns of lamp beads; the REXT port of each ICN2065 chip is externally connected with a current-limiting resistor to control the luminous brightness of the LED; and a VDD port of each ICN2065 chip is externally connected with a decoupling capacitor to play a role in filtering.
5. The 1/45 swept P2.5 LED full color display module with 80X90 specific resolution as set forth in claim 4, wherein: the capacitance value of the decoupling capacitor is 0.1 uf.
6. The 1/45 swept P2.5 LED full color display module with 80X90 specific resolution as set forth in claim 1, wherein: every HX6058 chip in the line drive module has 8 current output ports, and a current output port provides positive pole supply voltage for a horizontal 80 full-color RGB lamp pearls in the lamp face.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911280830.3A CN110853534A (en) | 2019-12-13 | 2019-12-13 | P2.5 LED full-color display module with 80X90 special resolution and swept by 1/45 |
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| CN201911280830.3A CN110853534A (en) | 2019-12-13 | 2019-12-13 | P2.5 LED full-color display module with 80X90 special resolution and swept by 1/45 |
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