CN107369429A - The method of identification data and the process circuit of correlation are read from display - Google Patents
The method of identification data and the process circuit of correlation are read from display Download PDFInfo
- Publication number
- CN107369429A CN107369429A CN201610309710.1A CN201610309710A CN107369429A CN 107369429 A CN107369429 A CN 107369429A CN 201610309710 A CN201610309710 A CN 201610309710A CN 107369429 A CN107369429 A CN 107369429A
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- China
- Prior art keywords
- microprocessor
- supply voltage
- storage element
- display
- circuit
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- 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.)
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Classifications
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
- G09G5/005—Adapting incoming signals to the display format of the display terminal
Abstract
The present invention proposes a kind of process circuit of the method that identification data is read from display and correlation.The method that an identification data is read from a display includes：An outside supply voltage is received from a video-frequency connector of the display, and voltage is supplied to produce an inside supply voltage according to the outside；Selectivity provides one of inside supply voltage and system supply voltage to a microprocessor；And using the microprocessor to read an identification data from one second storage element, and the identification data is stored into first storage element.
Description
Technical field
The invention relates to display, the place of the espespecially a kind of method that identification data is read from a display and correlation
Manage circuit.
Background technology
Traditionally, when on a display video-frequency connector pass through the aobvious of connecting line and an image transmission end (such as host computer)
When showing card connection, display blocks the extension display capabilities identification data (Extended that can directly go to read in display
Display identification data, EDID), and passed display data according to this extension display capabilities identification data
It is sent in display.In general, extension display capabilities identification data is previously stored electronics and erased formula EROM
In (Electrically-Erasable Programmable Read-Only Memory, EEPROM), and contain screen solution
The relevant information such as analysis degree and trade name and sequence number.However, store extension display capabilities identification data meeting using EEPROM
The increase of manufacturing cost is caused, thus reduces the competitiveness of product.
The content of the invention
Therefore, an object of the present invention is in the method and correlation for providing a kind of reading identification data from display
Process circuit, it can avoid storing extension display capabilities identification data using EEPROM, and can avoid using other again
Side effect caused by storage element meeting is extra, to solve the problems, such as prior art.
According to one embodiment of the invention, it is proposed that a kind of process circuit for being applied to a display, it includes one first
Storage element, a microprocessor, an internal source voltage and a selection circuit, the wherein microprocessor to from one second storage
Unit reads an identification data, and the identification data is stored into first storage element；The internal source voltage should to oneself
One video-frequency connector of display receives an outside supply voltage, and supplies voltage according to the outside to produce an inside supply electricity
Pressure；And the selection circuit to select to provide the inside supply voltage and a system supply one of voltage to this first
Storage element, second storage element and the microprocessor.
According to another embodiment of the present invention, a kind of method that an identification data is read from a display includes：From this
One video-frequency connector of display receives an outside supply voltage, and supplies voltage according to the outside to produce an inside supply electricity
Pressure；Selectivity provides one of inside supply voltage and system supply voltage to a microprocessor；And use and be somebody's turn to do
Microprocessor is stored the identification data to first storage element with reading an identification data from one second storage element
In.
Brief description of the drawings
For the above objects, features and advantages of the present invention can be become apparent, the tool below in conjunction with accompanying drawing to the present invention
Body embodiment elaborates, wherein：
Fig. 1 is the schematic diagram of the display according to one embodiment of the invention.
Fig. 2 is the schematic diagram of the thin portion framework of the process circuit according to one embodiment of the invention.
Fig. 3 is the schematic diagram of the selection circuit according to one embodiment of the invention.
Fig. 4 is a kind of flow of method that an identification data is read from a display according to one embodiment of the invention
Figure.
Component label instructions in figure：
100 displays
102 connecting lines
110 process circuits
120 flash memories
130 display panels
140 system voltage sources
150 video-frequency connectors
160 power connections
211st, 242 linear voltage regulator
212 selection circuits
213 microprocessors
214 memories
215 scaling circuits
241 power supply units
310 detection circuits
320 switch elements
402~406 steps
D1, D2 diode
Embodiment
Fig. 1 is refer to, it is the schematic diagram of the display 100 according to one embodiment of the invention.As shown in figure 1, display
100, which have comprised at least a process circuit 110, a flash memory 120, a display panel 130, a system voltage source 140, one, regards
The power connection 160 of frequency joint 150 and one, wherein video-frequency connector 150 are by a connecting line 102 and an external computer main frame
One display card connection.In the present embodiment, process circuit 110 be mainly used to via video-frequency connector 150 from external computer main frame
The multi-medium data of reception zooms in and out operation and other signal transactings, is shown with producing image data to display panel
Show；Flash memory 120 is located at outside process circuit 110, and stores the extension display capabilities identification data of display 100
(EDID)；The voltage conversion that system voltage source 140 is used for receiving power connection 160 from civil power is to be adapted to internal circuit to operate
System supply voltage Vsys；Video-frequency connector 150 can meet digital visual interface (Digital Visual
Interface, DVI), HDMI (High Definition Multimedia Interface, HDMI),
AV terminal (Composite video connector) ... or the joint of other video specifications, it is corresponding audio-visual for receiving
Data, and a 5V voltages are provided；Connecting line 102 is then to meet the transmission line of the specification of video-frequency connector 150, such as DVI transmission lines,
HDMI transmission lines ... etc..
In addition, in the present embodiment, process circuit 110 can be also received from external computer main frame from video-frequency connector 150
One external voltage source, and process circuit 110 itself and flash memory 120 are supplied after being converted to an inside supply voltage
Electricity, to allow process circuit 110 to read extension display capabilities identification data stored in flash memory 120, and will
The extension display capabilities identification data read is sent to external computer main frame by video-frequency connector 150 and connecting line 102
In display card.Therefore, by the function of process circuit 110 of the invention, can not connect in the power connection 160 of display 100
When being connected to external power source, the same extension display capabilities identification data that reads uses to the display card of external computer main frame, and is not required to
Extension display capabilities identification data is stored using EEPROM, therefore can reduce and be manufactured into the case where taking into account functional situation
This.It note that general display all includes flash memory 120, therefore extension display capabilities identification data be stored in soon
The practice of flash memory 120 simultaneously need not increase extra manufacturing cost.
More particularly, Fig. 2 is refer to, it is the thin portion framework of the process circuit 110 according to one embodiment of the invention
Schematic diagram.As shown in Fig. 2 process circuit 110 contain a linear voltage regulator (low-dropout linear regulator,
LDO) 211, one selection circuit 212, a microprocessor 213, a memory 214 and a scaling circuit 215；In addition, system is electric
Potential source 140 is then to contain a power supply unit 241 and a linear voltage regulator 242.In the present embodiment, selection circuit 212
Can be a multiplexer, and memory 214 can be a static RAM (Static Random Access
Memory, SRAM).
On the element shown in Fig. 2, wherein power supply unit 241 is used for producing 5V voltage, and linear voltage stabilization
Device 242 is supplied voltage Vsys come generation system according to this 5V voltage and used into process circuit 110 for it, and in the present embodiment
Middle system supply voltage Vsys is 3.3V.On the other hand, the linear voltage regulator 211 in process circuit 110 is come for receiving
Voltage Vint is supplied to produce an inside from a 5V of video-frequency connector 150 voltage, and according to this 5V voltage, and in this implementation
Internal supply voltage Vint is also 3.3V in example.In addition, other elements and flash memory 120 in process circuit 110 are then
Voltage Vsys or internal supply voltage Vint can be supplied by system to be powered.Below for whether with system supply
Voltage Vsys two kinds of different situations illustrate the built-in function of process circuit 110.
In the case of the power connection 160 of display 100 is not connected to power supply, system voltage source 140 just also will not
Generation system supplies voltage Vsys to process circuit 110, if now display 100 passes through 102 externally connected electricity of connecting line
Brain server, then the 5V voltages that linear voltage regulator 211 in process circuit 110 can be received according to video-frequency connector 150 are come in producing
Portion supplies voltage Vint, and inside supply voltage Vint will be supplied to microprocessor 213, memory 214 by selection circuit 212
And flash memory 120 uses.Once being powered, microprocessor 213 will transmit a reading order to flash memory
To require to read data therein in 120, and the data to being read carry out decoding operate (error correction decoding) to obtain
The extension display capabilities identification data needed, and this extension display capabilities identification data is temporarily stored in memory 214 again, for outer
Portion's host computer is read by connecting line 102 and video-frequency connector 150.In one embodiment, extension display capabilities identification number
It is set in advance according to the address being temporarily stored in memory 214, therefore external computer main frame passes through connecting line 102 and video-frequency connector
150 additionally need not be linked up when being read out and with microprocessor 213, you can with pre- directly from this in the memory 214
The address first set is read out.In addition, external computer main frame can receive the instruction extension display capabilities identification data
Store to memory 214 is just read during the indication signal of the memory 214 to obtain the display capabilities identification data, can also
Memory 214 is constantly read until obtaining the display capabilities identification data.
On the other hand, in the case of the power connection 160 of display 100 is connected to power supply, system voltage source 140 is just
Meeting generation system supplies voltage Vsys to process circuit 110, to supply electric power to whole process circuit 110 and flash memory
120.Now, if display 100 is by 102 externally connected host computer of connecting line, then due to process circuit 110 and soon
Flash memory 120 is at the state of power supply, therefore microprocessor 213 can directly transmit a reading order to flash memory
To require to read data therein in 120, and the data to being read carry out decoding operate (error correction decoding) to obtain
The extension display capabilities identification data needed, and this extension display capabilities identification data is temporarily stored in memory 214 again, for outer
Portion's host computer is read by connecting line 102 and video-frequency connector 150.In addition, the it is noted that now meeting of selection circuit 212
Internal supply voltage Vint is closed to the path of the other elements of process circuit 110, that is, internal supply voltage Vint will not be passed
It is sent in microprocessor 213, memory 214 and flash memory 120.
In addition, in the framework shown in Fig. 2, in order to avoid when process circuit 110 is by inside supply voltage Vint power supplies,
Electric current caused by the supply voltage Vint of inside is poured in down a chimney into display 100 by selection circuit 212 and linear voltage regulator 242
Other elements, and cause power wastage, selection circuit 212 can use a multiplexer or similar on-off circuit come it is real
Make, occurred with the situation for avoiding this electric current from pouring in down a chimney.Fig. 3 is refer to, it is the selection circuit 212 according to one embodiment of the invention
Schematic diagram.As shown in figure 3, selection circuit 212 contains two diode D1, D2, a detection switch member of circuit 310 and one
Part 320.In the operation of the selection circuit 212 shown in Fig. 3, the supply voltage of detection circuit 310 is to supply voltage by system
Voltage Vint is supplied to provide in Vsys or inside, in other words, as long as system supply voltage Vsys or internal supply voltage
If one of Vint is present, detection circuit 310 is i.e. actionable；In addition, detection circuit 310 can supply voltage with detecting system
Vsys whether there is, such as the pin magnitude of voltage of detection chip whether there is to judge that system supplies voltage Vsys, and produce according to this
A raw switch controlling signal Vsw, optionally to regard system supply voltage Vsys or internal supply voltage Vint as output
Voltage Vout is exported into microprocessor 213, memory 214 and flash memory 120.Specifically, when detection circuit 310
When detecting system supply voltage Vsys is not present, switch controlling signal Vsw is produced to switch element 320 to supply inside to voltage
Vint is as output voltage Vout；Conversely, in the presence of detection circuit 310 detecting system supply voltage Vsys, switch control is produced
Signal Vsw processed is to switch element 320 to regard system supply voltage Vsys as output voltage Vout.As described above, pass through Fig. 3 institutes
The framework shown, the situation that electric current can be avoided to pour in down a chimney really occur.
It is noted that Fig. 2, the circuit framework shown in 3 are only example explanation, rather than as limitation of the invention,
In the other embodiment of the present invention, in the presence of system supply voltage Vsys, system supply voltage Vsys can directly feed micro-
Processor 213, memory 214 and flash memory 120, without passing through selection circuit 212.In other words, selection electricity
Road 212 can only be used for optionally providing internal supply voltage Vint, and system supply voltage Vsys is then by other roads
Footpath sends microprocessor 213, memory 214 and flash memory 120 to.
In addition, scaling, though circuit 215 can be supplied voltage Vint by inside or system supplies voltage Vsys to be powered,
But the electric current provided by internal supply voltage Vint is generally relatively low (such as 500mA), and system supply voltage Vsys can be with
Higher electric current (such as 3~4A) is provided, therefore, in one embodiment, when system supply voltage Vsys is not present, to avoid
The electric current that inside supply voltage Vint is provided is insufficient and causes the mistake of data processing, and microprocessor 213 can produce control letter
Number Vc is to close at least one of function in scaling circuit 215, or closes its all function, to save electric power.It is another
Aspect, microprocessor 213 also can decide whether to close scaling circuit according to the indication signal Vind from video-frequency connector 150
At least one of function in 215, wherein indication signal Vind are used to refer to show whether external computer main frame transfers data to aobvious
Show that device 100 is shown, and indication signal Vind can be a clock signal or a synchronizing signal according to the difference of specification.
In another embodiment, when microprocessor 213 does not receive indication signal Vind, microprocessor 213 directly produces control signal
Vc scales at least one of function in circuit 215 to close, or closes its all function, to save electric power.
It can be summarized as follows on the element operation in process circuit 110：(1) voltage Vsys is supplied when system exist, be aobvious
When showing that device 110 is connected to external computer main frame and microprocessor 213 receives indication signal Vind, whole processing
The normal operation of circuit 110, and microprocessor 213, memory 214, scaling circuit 215 and flash memory 120 are by system
Supply voltage Vsys is powered；(2) when system supply voltage Vsys is present, display 110 is connected to external computer main frame,
But microprocessor 213, when being not received by indication signal Vind, microprocessor 213 closes in scaling circuit 215 at least one
The function of dividing, and microprocessor 213, memory 214 and flash memory 120 are powered by system supply voltage Vsys
Continue to operate；(3) when system supply voltage Vsys is present but display 110 is not connected to external computer main frame and micro- place
When reason device 213 is not received by indication signal Vind, microprocessor 213 closes at least one of function in scaling circuit 215,
And microprocessor 213, memory 214 and flash memory 120 are powered by system supply voltage Vsys and continue to operate；
(4) no matter voltage Vsys is not present, display 110 is connected to external computer main frame and microprocessor 213 has when system supply
Or when being not received by indication signal Vind, microprocessor 213 closes at least one of function in scaling circuit 215, and micro-
Processor 213, memory 214 and flash memory 120 are then powered by inside supply voltage Vint to be continued to operate.
Fig. 4 is refer to, it is a kind of side that an identification data is read from a display according to one embodiment of the invention
The flow chart of method.It is described below with reference to Fig. 1~4 and above Related Disclosure content, flow：
Step 402：An outside supply voltage is received from the video-frequency connector of display, and voltage is supplied to produce according to the outside
Raw inside supply voltage.
Step 404：Selectivity provides one of inside supply voltage and system supply voltage to a microprocessor
Device.
Step 406：Using the microprocessor to read the identification data from one second storage element, and by the identification data
Storage is into first storage element.
The brief summary present invention, in the processing of a kind of method that identification data is read from display and correlation of the present invention
In circuit, display is it eliminated using EEPROM to store extension display capabilities identification data to save cost, and can be
In the case of display is not connected with power connection, the external computer main frame being connected with display is made to be able to obtain display in advance
Identification data, can more avoid display from being fallen using caused electric current during inside supply voltage from external computer main frame
Filling problem, therefore, the present invention can take into account the function of power saving simultaneously in the case of manufacturing cost is saved.
Although the present invention is disclosed as above with preferred embodiment, so it is not limited to the present invention, any this area skill
Art personnel, without departing from the spirit and scope of the present invention, when a little modification and perfect, therefore the protection model of the present invention can be made
Enclose to work as and be defined by what claims were defined.
Claims (17)
1. a kind of process circuit for being applied to a display, includes：
One first storage element；
One microprocessor, to from one second storage element read an identification data, and by the identification data store to this first
In storage element；
One internal source voltage, to receive an outside supply voltage from a video-frequency connector of the display, and supplied according to the outside
Voltage is answered to produce an inside supply voltage；And
One selection circuit, to select to provide one of inside supply voltage and system supply voltage to first storage
Memory cell, second storage element and the microprocessor.
2. process circuit as claimed in claim 1, it is characterised in that second storage element is a flash memory chip,
And the identification data is an extension display capabilities identification data (Extended display of the display
Identification data, EDID).
3. process circuit as claimed in claim 1, it is characterised in that the process circuit is a chip, second storage element
Outside the chip.
4. process circuit as claimed in claim 1, is additionally comprised：
One scaling circuit, for being handled the multi-medium data received from the video-frequency connector to produce data after a processing
And it is sent to a display panel of the display；
Wherein the microprocessor selectively turns on or closed scaling electricity according to the indication signal received from the video-frequency connector
Part of functions in road.
5. process circuit as claimed in claim 4, it is characterised in that the indication signal is a clock signal or a synchronous letter
Number.
6. process circuit as claimed in claim 4, it is characterised in that when system supply voltage presence and the microprocessor
When receiving the indication signal, the selection circuit provide the system supply voltage to the microprocessor, first storage element, should
Second storage element and the scaling circuit.
7. process circuit as claimed in claim 4, it is characterised in that when system supply voltage presence and the microprocessor
When not receiving the indication signal, the selection circuit provide the system supply voltage to the microprocessor, first storage element,
Second storage element and the scaling circuit, the partial function that the microprocessor is closed in the scaling circuit.
8. process circuit as claimed in claim 4, it is characterised in that when system supply voltage is not present, selection electricity
Road provides the inside and supplies voltage to the microprocessor, first storage element, second storage element and the scaling circuit,
The partial function that the microprocessor is closed in the scaling circuit.
9. process circuit as claimed in claim 1, it is characterised in that the selection circuit includes：
One detection circuit, it whether there is for detecting system supply voltage.
10. a kind of method that an identification data is read from a display, includes：
An outside supply voltage is received from a video-frequency connector of the display, and voltage is supplied to produce inside one according to the outside
Supply voltage；
Selectivity provides one of inside supply voltage and system supply voltage to a microprocessor；And
Using the microprocessor to read the identification data from one second storage element, and the identification data is stored to one first
In storage element.
11. method as claimed in claim 10, it is characterised in that second storage element is a flash memory chip, and
The identification data extends display capabilities identification data (Extended display identification for the one of the display
Data, EDID).
12. method as claimed in claim 10, is additionally comprised：
The multi-medium data received from the video-frequency connector is handled with data after the processing of generation one and be sent to the display
One display panel of device；And
An indication signal according to being received from the video-frequency connector, which is selectively turned on or closed, to be handled the multi-medium data
The part of functions of the step of to produce data after the processing.
13. method as claimed in claim 12, it is characterised in that the indication signal is a clock signal or a synchronous letter
Number.
14. method as claimed in claim 12, it is characterised in that after being handled the multi-medium data to produce the processing
The step of data, is carried out by a scaling circuit, wherein voltage is present and the microprocessor receives this and referred to when the system is supplied
When showing signal, there is provided the system supplies voltage to the microprocessor, first storage element, second storage element and the contracting
Electric discharge road.
15. method as claimed in claim 12, it is characterised in that after being handled the multi-medium data to produce the processing
The step of data, is carried out by a scaling circuit, wherein voltage is present and the microprocessor does not receive this when the system is supplied
During indication signal, there is provided the system is supplied voltage to the microprocessor, first storage element, second storage element and is somebody's turn to do
Scale circuit, the partial function that the microprocessor is closed in the scaling circuit.
16. method as claimed in claim 12, it is characterised in that this is handled the multi-medium data to produce the processing
The step of data are carried out by a scaling circuit afterwards, wherein when system supply voltage is not present, there is provided inside supply electricity
It is depressed into the microprocessor, first storage element, second storage element and the scaling circuit, the microprocessor and closes the contracting
The partial function in electric discharge road.
17. method as claimed in claim 12, it is characterised in that selectivity provides inside supply voltage and supplied with the system
One of voltage to the step of microprocessor, includes：
Detect system supply voltage whether there is, and inside supply voltage is provided according to this and supplies voltage wherein with the system
One of to the microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610309710.1A CN107369429A (en) | 2016-05-11 | 2016-05-11 | The method of identification data and the process circuit of correlation are read from display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610309710.1A CN107369429A (en) | 2016-05-11 | 2016-05-11 | The method of identification data and the process circuit of correlation are read from display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107369429A true CN107369429A (en) | 2017-11-21 |
Family
ID=60303810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610309710.1A Pending CN107369429A (en) | 2016-05-11 | 2016-05-11 | The method of identification data and the process circuit of correlation are read from display |
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| CN (1) | CN107369429A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110428792A (en) * | 2019-07-08 | 2019-11-08 | 新华三技术有限公司合肥分公司 | Controller, display screen parameter configuring system and method |
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| US20150036054A1 (en) * | 2007-07-23 | 2015-02-05 | Samsung Electronics Co., Ltd. | Display apparatus and control method thereof |
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| US20150036054A1 (en) * | 2007-07-23 | 2015-02-05 | Samsung Electronics Co., Ltd. | Display apparatus and control method thereof |
| CN102833619A (en) * | 2008-12-19 | 2012-12-19 | 日立民用电子株式会社 | A data reading method, and a video transmitter and a video receiver using the same |
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