CN108573674A - LED display control chips - Google Patents
LED display control chips Download PDFInfo
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- CN108573674A CN108573674A CN201810751442.8A CN201810751442A CN108573674A CN 108573674 A CN108573674 A CN 108573674A CN 201810751442 A CN201810751442 A CN 201810751442A CN 108573674 A CN108573674 A CN 108573674A
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The invention discloses a kind of LED display control chips.Wherein, which includes：Logic control device is connected with image buffer, LED detection modules, public pole control logic module, display control module, functional memory, Low Voltage Differential Signal LVDS communication modules, low pressure difference linear voltage regulator LDO；LVDS communication modules, for transmitting image information or signal instruction to logic control device；Functional memory is corrected and configures to the signal instruction of logic control device write-in；Image buffer, for storing image information；Public pole control logic module, the first control command for receiving logic control device, to carry out opening operation or shutoff operation to the public pole of target LED component；Display control module, the second control command for receiving logic control device, to carry out opening operation or shutoff operation to the R/G/B primary colours grades of target LED component.
Description
Technical field
The present invention relates to LED fields, in particular to a kind of LED display control chips.
Background technology
With the development of science and technology, LED product has applied among people’s lives more and more, current LED displays control
Coremaking piece designs by the way of discrete device, i.e. constant current source chip+DC-DC power source circuit+MOS switch (i.e. metal-oxide-semiconductor switch electricity
Road is the circuit using the principle construction of metal-oxide-semiconductor grid control metal-oxide-semiconductor source electrode and drain electrode break-make)+logic switch+logical drive,
The display control of the pairs of LED of group.
In the prior art, LED display control chips part category is more, and processing efficiency is low, and system complexity is high, system power dissipation
It is high
For above-mentioned problem, currently no effective solution has been proposed.
Invention content
An embodiment of the present invention provides a kind of LED display control chips, at least to solve LED display controls in the prior art
The high technical problem of chip system complexity.
One side according to the ... of the embodiment of the present invention provides a kind of LED display control chips, including：Logic controller
Part, with image buffer, LED detection modules, public pole control logic module, display control module, functional memory, low voltage difference
Sub-signal LVDS communication modules, low pressure difference linear voltage regulator LDO are connected；LVDS communication modules are used for the logic control
Device transmission image information or signal instruction；Functional memory carries out school to the signal instruction of logic control device write-in
Just and configure；Image buffer, for storing described image information；Public pole control logic module, for receiving the logic
First control command of control device, to carry out opening operation or shutoff operation to the public pole of target LED component；Display control
Module, the second control command for receiving the logic control device, to be carried out to the R/G/B primary colours grades of target LED component
Opening operation or shutoff operation；LED detection modules, with the logic control device, the public pole control logic module and institute
It states display control module to be separately connected, for detecting voltage or current status inside LED display control chips；Low pressure difference linearity
Voltage-stablizer LDO, the voltage of the first default value for will receive are converted to the voltage of target value, and to the logic control
Device processed, described image buffer, the LED detection modules, the public pole control logic module, the display control mould
Block, the functional memory, Low Voltage Differential Signal LVDS communication modules power supply.
Further, further include：First dc voltage changer part, connect with the low pressure difference linear voltage regulator, is used for
Externally input voltage is converted to the voltage of the first default value, and described first is provided to the low pressure difference linear voltage regulator
The voltage of default value；Second dc voltage changer part, connect with the display control module, is used for externally input electricity
Pressure is converted to the voltage of the second default value, and the voltage of the second default value is provided to the display control module；Third is straight
Voltage conversion device is flowed, is connect with the display control module, for externally input voltage to be converted to third default value
Voltage, and to the display control module provide the second default value voltage.
Further, further include：Power input pin is converted with the first dc voltage changer part, the second DC voltage
Device, third dc voltage changer part are separately connected, for receiving externally input power supply, and to first DC voltage
Switching device, the second dc voltage changer part, third dc voltage changer part are powered respectively.
Further, the LED display control chips further include：First external port connects with the power input pin
It connects, for connecting external power supply.
Further, the LED display control chips further include：Temperature sensor is connect with the logic control device,
Temperature value for detecting the LED display control chips, wherein the logic control device reads the temperature sensor inspection
The temperature value measured.
Further, the display control module includes：Spread spectrum control circuit.
Further, the LED display control chips further include：Second external port, with the public pole control logic
Module connects, for inputting open command or shutdown command to the public pole of external target LED component；The external end of third
Mouthful, it is connect with the display control module, the R/G/B primary colours grades input display life for the target LED component to external connection
It enables.
Further, the LVDS communication modules include：First sub- LVDS communication modules and the second sub- LVDS communication modules,
It is connect respectively with the logic control device.
Further, the LED display control chips further include：4th external port is communicated with the described first sub- LVDS
Module connects, the first image information of transmission or signal instruction for receiving external transmission；5th external port, with described second
Sub- LVDS communication modules connection, the second image information of transmission or signal instruction for receiving external transmission.
Further, the LED detection modules include at least following one：Open detection circuit, short-circuit detecting circuit, mistake
Carry detection circuit, excess temperature detection circuit, builtin voltage detection circuit, converse electrical leakage detection circuit.
In embodiments of the present invention, carrying out system-level ASIC-LED driver, (wherein, ASIC, English are
Application Specific Intergrated Circuits, refer to application-specific integrated circuit, are and LED core in the application
The integrated circuit of piece independent design, and ASIC-LED driver indicate the system-level chip driven for LED) design, it reaches
Comprehensive logic control has been arrived, the design of LED display control chips has been avoided and uses discrete device, be not necessarily to power supply and sensor etc.
Equipment is placed on the outside of chip, can equipment such as portion's integrated power supply and sensor in the chip, the content of design is simpler, reaches
Having arrived reduces the technique effect of LED display control chip system complexities, and then solves LED display controls core in the prior art
The high technical problem of piece system complexity.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of LED display control chips provided in an embodiment of the present invention.
Specific implementation mode
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without making creative work should all belong to the model that the present invention protects
It encloses.
It should be noted that term " first " in description and claims of this specification and above-mentioned attached drawing, "
Two " etc. be for distinguishing similar object, without being used to describe specific sequence or precedence.It should be appreciated that using in this way
Data can be interchanged in the appropriate case, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that cover
It includes to be not necessarily limited to for example, containing the process of series of steps or unit, method, system, product or equipment to cover non-exclusive
Those of clearly list step or unit, but may include not listing clearly or for these processes, method, product
Or the other steps or unit that equipment is intrinsic.
For ease of user understand the present invention, below to involved in various embodiments of the present invention part term or title make solution
It releases：
LVDS, English Low-Voltage Differential Signaling, low-voltage differential signal are a kind of low noises
Acoustical signal transmission mode.
LDO, Low Dropout Regulator, low pressure difference linear voltage regulator are systems on the lower microchip of consumable.
ASIC：Application Specific Integrated Circuit, a kind of collection designed for special purpose
At circuit.
In the related technology, the design of LED display control chips is by the way of discrete device, i.e. constant current source chip+DC-DC electricity
Source circuit+MOS switch+logic switch+logical drive, organizes the display control of pairs of LED.This mode in the related technology, needs
The equipment such as power circuit and logic switch and sensor are placed on to the outside of chip, chip need with each power module,
Sensor assembly connection can cause the device of LED display control apparatus to increase in this way, and processing is complicated, and efficiency is low, and should
The system connection of device is complicated, and occupying PCB, (Printed Circuit Board indicate printed circuit board, are electronic components
Supporter) circuit is more, product failure link is more, and stability is relatively relatively low；System forms each component not according to system level power consumption
Consider, causes accumulated power consumption high, it is unfavorable to client's power consumption.
In embodiments of the present invention, using the power consumption control of optimization, the communication logic of automatic frame per second identifying schemes, intelligence
Design, EMI (Electromagnetic Interference, i.e. electromagnetic interference) design optimization (addition of spread spectrum part), intelligence
Image processing algorithm can make chip by the way that power supply and sensor, image buffer to be integrated in display control chip
Power supply is automatically provided, and is powered to modules, external interface access is simplified, simplifies connection, the efficiency of control
Also can higher, and can display effect be improved, equally simplify PCB design.
Fig. 1 is the schematic diagram of LED display control chips provided in an embodiment of the present invention, as shown in Figure 1, dotted line indicates signal
Transmission, solid line indicate that the transmission of voltage, the display control chip include：Logic control device, LVDS communication modules, function storage
Device, public pole control logic module, display control module, LED detection modules, low pressure difference linear voltage regulator LDO, wherein
Logic control device, with image buffer, LED detection modules, public pole control logic module, display control mould
Block, functional memory, Low Voltage Differential Signal LVDS communication modules, low pressure difference linear voltage regulator LDO are connected.
LVDS communication modules, for transmitting image information or signal instruction to logic control device.It may include first
LVDS communication modules and the 2nd LVDS communication modules.
Functional memory is corrected and configures to the signal instruction of logic control device write-in；Image buffer is used for
Store image information.
Public pole control logic module, the first control command for receiving logic control device, with to target LED component
Public pole carry out opening operation or shutoff operation.
Display control module (the R/G/B display controls in corresponding diagram), the second control for receiving logic control device
Order, to carry out opening operation or shutoff operation to the R/G/B primary colours grades of target LED component；
LED detection modules are separately connected with logic control device, public pole control logic module and display control module,
For detecting voltage or current status inside LED display control chips；
The voltage of low pressure difference linear voltage regulator LDO, the first default value for will receive are converted to target value
Voltage, and to logic control device, image buffer, LED detection modules, public pole control logic module, display control module,
Functional memory, the power supply of Low Voltage Differential Signal LVDS communication modules.
By above-mentioned LDO, 3.3V voltages can be converted to 2.5V voltages, so that other modules use.
Optionally, above-mentioned display control chip further includes：First dc voltage changer part (DC- in corresponding diagram
DC24V-3.3V systems power, you can externally input 24V is converted to 3.3V), it is connect with low pressure difference linear voltage regulator,
Voltage for externally input voltage to be converted to the first default value, and provide first to low pressure difference linear voltage regulator and preset
The voltage of numerical value；Second dc voltage changer part (DC-DC 24V-3.8V LED-G/Bpower in corresponding diagram 1, you can with will
Externally input 24V voltages are converted to 3.8V), it is connect with display control module, for externally input voltage to be converted to
The voltage of two default values, and to display control module provide the second default value voltage；Third dc voltage changer part
(DC-DC 24V-2.8V LED-R power in corresponding diagram 1, you can externally input 24V voltages are converted to 2.8V), with
Display control module connects, the voltage for externally input voltage to be converted to third default value, and to display control mould
Block provides the voltage of the second default value.
Optionally, above-mentioned display control chip further includes：Power input pin, with the first dc voltage changer part,
Second dc voltage changer part, third dc voltage changer part are separately connected, for receiving externally input power supply, and to
First dc voltage changer part, the second dc voltage changer part, third dc voltage changer part are powered respectively.
In addition, LED display control chips further include：First external port (the external port 1 in corresponding diagram 1), with power supply
Input pin connects, for connecting external power supply.The first external port can connect external power supply apparatus, to input electricity
The power supply in source, input can be that 24V does not limit the size of the power supply certainly in the application.
Optionally, LED display control chips further include：Temperature sensor is connect with logic control device, for detecting
The temperature value of LED display control chips, wherein logic control device reads the temperature value that temperature sensor detects.
It should be noted that above-mentioned display control module includes：Spread spectrum control circuit.
A kind of optional, above-mentioned LED display control chips further include：Second external port (has corresponded to external in Fig. 1
Port 2), it is connect with public pole control logic module, for the public pole to external target LED component (being LED component)
Input open command or shutdown command；The external port of third (the external port 3 in corresponding diagram 1) connects with display control module
It connects, the R/G/B primary colours grades for the target LED component to external connection input display command.
Wherein, above-mentioned LVDS communication modules include：(the first LVDS in corresponding diagram 1 is logical for first sub- LVDS communication modules
Believe module) and the second sub- LVDS communication modules (having corresponded to the 2nd LVDS communication modules 2 in Fig. 1), respectively with logic controller
Part connects.
Another optional embodiment, LED display control chips further include：4th external port (has corresponded in Fig. 1
External port 4), it is connect with the first sub- LVDS communication modules, the first image information of transmission or signal for receiving external transmission
Instruction；5th external port (the external port 5 in corresponding diagram 1), connect with the second sub- LVDS communication modules, for receiving outside
The second image information of transmission or signal instruction of transmission.
In addition, above-mentioned LED display control chips can also connect other external ports, as in Fig. 1 external port 6,
7,8, these external ports can be connect with external other devices, these devices can not be integrated into chip interior, to
It needs to connect with the display control chip.
For the embodiment of the present invention, LED detection modules include at least following one：Open detection circuit (i.e. opening in LED
Road detect LOD), short-circuit detecting circuit (i.e. short-circuit detecting circuit LSD in LED), overload detection circuit (i.e. overload in LED
Detection circuit OLD), excess temperature detection circuit (i.e. excess temperature detection circuit TSD in LED), builtin voltage detection circuit is (i.e. in LED
Builtin voltage detection circuit ISF), converse electrical leakage detection circuit.
In embodiments of the present invention, system-level ASIC-LED driver designs are carried out, comprehensive logic control has been reached
System avoids the design of LED display control chips using the high skill of LED display control chip system complexities caused by discrete device
Art problem has reached the technique effect for reducing LED display control chip system complexities.
The embodiments of the present invention are for illustration only, can not represent the quality of embodiment.
In the above embodiment of the present invention, all emphasizes particularly on different fields to the description of each embodiment, do not have in some embodiment
The part of detailed description may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, for example, the unit division, Ke Yiwei
A kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or component can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, unit or module
It connects, can be electrical or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
On unit.Some or all of unit therein can be selected according to the actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
It is that each unit physically exists alone, it can also be during two or more units be integrated in one unit.Above-mentioned integrated list
The form that hardware had both may be used in member is realized, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can be stored in a computer read/write memory medium.Based on this understanding, technical scheme of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or network equipment etc.) execute each embodiment the method for the present invention whole or
Part steps.And storage medium above-mentioned includes：USB flash disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can to store program code
Medium.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of LED display control chips, which is characterized in that including：
Logic control device, with image buffer, LED detection modules, public pole control logic module, display control module, work(
Energy memory, Low Voltage Differential Signal LVDS communication modules, low pressure difference linear voltage regulator LDO are connected；
LVDS communication modules, for transmitting image information or signal instruction to the logic control device；
Functional memory is corrected and configures to the signal instruction of logic control device write-in；
Image buffer, for storing described image information；
Public pole control logic module, the first control command for receiving the logic control device, with to target LED component
Public pole carry out opening operation or shutoff operation；
Display control module, the second control command for receiving the logic control device, with to the target LED component
R/G/B primary colours grades carry out opening operation or shutoff operation；
LED detection modules, with the logic control device, the public pole control logic module and the display control module point
It does not connect, for detecting voltage or current status inside LED display control chips；
The voltage of low pressure difference linear voltage regulator LDO, the first default value for will receive are converted to the voltage of target value,
And to the logic control device, described image buffer, the LED detection modules, the public pole control logic module, institute
State display control module, the functional memory, Low Voltage Differential Signal LVDS communication modules power supply.
2. control chip according to claim 1, which is characterized in that further include：
First dc voltage changer part, connect with the low pressure difference linear voltage regulator, for converting externally input voltage
For the voltage of the first default value, and provide to the low pressure difference linear voltage regulator voltage of first default value；
Second dc voltage changer part, connect with the display control module, for externally input voltage to be converted to
The voltage of two default values, and to the display control module provide the second default value voltage；
Third dc voltage changer part, connect with the display control module, for externally input voltage to be converted to
The voltage of three default values, and to the display control module provide the second default value voltage.
3. LED display control chips according to claim 2, which is characterized in that further include：
Power input pin is converted with the first dc voltage changer part, the second dc voltage changer part, third DC voltage
Device is separately connected, for receiving externally input power supply, and to the first dc voltage changer part, the second DC voltage
Switching device, third dc voltage changer part are powered respectively.
4. LED display control chips according to claim 3, which is characterized in that the LED display control chips also wrap
It includes：
First external port is connect with the power input pin, for connecting external power supply.
5. LED display control chips according to claim 1, which is characterized in that the LED display control chips also wrap
It includes：
Temperature sensor is connect with the logic control device, the temperature value for detecting the LED display control chips,
In, the logic control device reads the temperature value that the temperature sensor detects.
6. LED display control chips according to claim 1, which is characterized in that the display control module includes：Spread spectrum
Control circuit.
7. LED display control chips according to claim 1, which is characterized in that the LED display control chips also wrap
It includes：
Second external port is connect with the public pole control logic module, for the public affairs to the external target LED component
Copolar inputs open command or shutdown command；
The external port of third, connect with the display control module, for the target LED component R/G/B primary colours to external connection
Grade input display command.
8. LED display control chips according to claim 1, which is characterized in that the LVDS communication modules include：
First sub- LVDS communication modules and the second sub- LVDS communication modules, connect with the logic control device respectively.
9. LED display control chips according to claim 8, which is characterized in that the LED display control chips also wrap
It includes：
4th external port is connect with the described first sub- LVDS communication modules, the first image of transmission for receiving external transmission
Information or signal instruction；
5th external port is connect with the described second sub- LVDS communication modules, the second image of transmission for receiving external transmission
Information or signal instruction.
10. LED display control chips according to claim 1, which is characterized in that the LED detection modules include at least
Following one：
It is open detection circuit, short-circuit detecting circuit, overload detection circuit, excess temperature detection circuit, builtin voltage detection circuit, reverse
Electric-leakage detection circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810751442.8A CN108573674A (en) | 2018-07-10 | 2018-07-10 | LED display control chips |
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|---|---|---|---|
| CN201810751442.8A CN108573674A (en) | 2018-07-10 | 2018-07-10 | LED display control chips |
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| WO2020143402A1 (en) * | 2019-01-11 | 2020-07-16 | 京东方科技集团股份有限公司 | Strip screen control circuit, strip screen display system, and strip screen control method |
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|---|---|---|---|---|
| WO2020143402A1 (en) * | 2019-01-11 | 2020-07-16 | 京东方科技集团股份有限公司 | Strip screen control circuit, strip screen display system, and strip screen control method |
| US11127328B2 (en) | 2019-01-11 | 2021-09-21 | Boe Technology Group Co., Ltd. | Bar screen control circuitry, bar screen display system and method for controlling a bar screen |
| CN113436566A (en) * | 2021-06-22 | 2021-09-24 | 上海中航光电子有限公司 | Display panel and driving method thereof |
| CN114913809A (en) * | 2022-03-09 | 2022-08-16 | 马瑞利汽车零部件(芜湖)有限公司 | Car light display screen control system based on Mini LED light source |
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