CN109407356A - Display screen powers on voltage-stabilizing power supply system and display screen powers on pressure stabilizing method of supplying power to - Google Patents
Display screen powers on voltage-stabilizing power supply system and display screen powers on pressure stabilizing method of supplying power to Download PDFInfo
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- CN109407356A CN109407356A CN201710707483.2A CN201710707483A CN109407356A CN 109407356 A CN109407356 A CN 109407356A CN 201710707483 A CN201710707483 A CN 201710707483A CN 109407356 A CN109407356 A CN 109407356A
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- display screen
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
Voltage-stabilizing power supply system is powered on the invention discloses a kind of display screen and display screen powers on pressure stabilizing method of supplying power to.It includes: main control chip, power management chip and voltage acquisition chip that display screen according to the present invention, which powers on voltage-stabilizing power supply system,；Wherein, voltage acquisition chip is for executing the sampling of display screen terminal voltage to acquire display screen terminal voltage, and collected display screen terminal voltage value is sent to main control chip；Main control chip is used for according to voltage setup parameter or the display screen terminal voltage value received from voltage acquisition chip, sends power source output command signal to power management chip；Power management chip is used for according to the power source output command signal received from main control chip, executes power supply output to display screen to provide supply voltage to display screen.
Description
Technical field
Voltage-stabilizing power supply system is powered on the present invention relates to liquid crystal LCM mould group testing field more particularly to a kind of display screen and is shown
Display screen powers on pressure stabilizing method of supplying power to.
Background technique
LCM (LCD Module) mould group (LCD display module) generates to be carried out lighting test when completing.Mould group is lighted
Need stringent electrifying timing sequence and voltage requirement.
But current lighting-up equipment is not to be directly connected to shield, and all can have a distance with screen.In this case,
Line loss problem just becomes very intractable；Specifically, lighting can because environment, wire rod, wire length etc. lead to the problem of it is various.
In order to solve the lighting abnormal problem as caused by line loss, can generally go voltage appropriate of raising according to the actual situation
It solves the problems, such as.But voltage is raised simply, it also will increase the risk of burn-in.
Therefore, those skilled in the art is dedicated to developing and a kind of can solve in the case where not increasing the risk of burn-in
The technical solution of lighting abnormal problem as caused by line loss.
Summary of the invention
In view of the above drawbacks of the prior art, technical problem to be solved by the invention is to provide one kind not to increase
Add solve in the case where the risk of burn-in the display screen of lighting abnormal problem as caused by line loss power on voltage-stabilizing power supply system and
Display screen powers on pressure stabilizing method of supplying power to.
To achieve the above object, the present invention provides a kind of display screens to power on voltage-stabilizing power supply system, comprising: main control chip,
Power management chip and voltage acquisition chip；Wherein, voltage acquisition chip is for executing the sampling of display screen terminal voltage to acquire
Display screen terminal voltage, and collected display screen terminal voltage value is sent to main control chip；Main control chip is used for basis
Voltage setup parameter or the display screen terminal voltage value received from voltage acquisition chip send power supply to power management chip
Output instruction signal；Power management chip is used for according to the power source output command signal received from main control chip, to display screen
Power supply output is executed to provide supply voltage to display screen.
Preferably, main control chip is when the display screen terminal voltage value received is lower than predetermined voltage threshold to power management
Chip sends the power source output command signal for promoting the supply voltage provided to display screen.
It is further preferred that subtracting the display screen terminal voltage received from voltage acquisition chip according to predetermined voltage threshold
The difference of value determines lifting values when promoting the supply voltage provided to display screen.
Preferably, it is more than predetermined difference value that main control chip is higher than predetermined voltage threshold in the display screen terminal voltage value received
When to power management chip send the power source output command signal that the supply voltage that provide to display screen is provided.
Preferably, predetermined voltage threshold is display screen terminal voltage rated value.
Preferably, display screen is LCD display.
To achieve the above object, the present invention also provides a kind of display screens to power on pressure stabilizing method of supplying power to, comprising:
First step: before voltage acquisition chip carries out power supply output, voltage acquisition chip executes an initialization voltage
Acquisition, and collection result is sent to main control chip to calibration measurement result；
Second step: main control chip is after receiving voltage setup parameter, according to control power supply pipe after voltage setup parameter
The power supply for managing chip exports to power on to system；
Third step: the sampling of display screen terminal voltage is executed constantly using voltage acquisition chip with acquisition terminal voltage；
Four steps: judging whether display screen terminal voltage value is lower than predetermined voltage threshold, if display screen terminal voltage
Value is lower than predetermined voltage threshold, and then power management chip promotes the supply voltage provided to display screen.
Preferably, the difference of the display screen terminal voltage value received from voltage acquisition chip is subtracted according to predetermined voltage threshold
Value determines lifting values when promoting the supply voltage provided to display screen.
Preferably, display screen is LCD display.
The present invention can solve to cause power supply from source due to walking long line in the case where not will increase the risk of burn-in very well
The loss problem of terminal is held, to be supplied to the most suitable power supply of lighting, improves the lighting effect of lighting-up equipment.
It is described further below with reference to technical effect of the attached drawing to design of the invention, specific structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
Detailed description of the invention
In conjunction with attached drawing, and by reference to following detailed description, it will more easily have more complete understanding to the present invention
And its adjoint advantage and feature is more easily to understand, in which:
Fig. 1 is the functional block diagram that preferred embodiment display screen powers on voltage-stabilizing power supply system according to the present invention.
Fig. 2 is the flow chart that display screen according to the preferred embodiment of the invention powers on pressure stabilizing method of supplying power to.
It should be noted that attached drawing is not intended to limit the present invention for illustrating the present invention.Note that indicating that the attached drawing of structure can
It can be not necessarily drawn to scale.Also, in attached drawing, same or similar element indicates same or similar label.
Specific embodiment
Fig. 1 is the functional block diagram that preferred embodiment display screen powers on voltage-stabilizing power supply system according to the present invention.
As shown in Figure 1, it includes: main control chip 1, electricity that preferred embodiment display screen, which powers on voltage-stabilizing power supply system, according to the present invention
Source control chip 2 and voltage acquisition chip 3.
Wherein, voltage acquisition chip 3 is sampled for executing display screen terminal voltage to acquire display screen terminal voltage, and
Collected display screen terminal voltage value is sent to main control chip 1；Main control chip 1 be used for according to voltage setup parameter or from
The display screen terminal voltage value that voltage acquisition chip 3 receives sends power source output command signal to power management chip 2；Electricity
Source control chip 2 is used for according to the power source output command signal that receives from main control chip 1, to display screen execute power supply output with
Supply voltage is provided to display screen.
Specifically, main control chip 1 is lower than predetermined voltage threshold (for example, predetermined in the display screen terminal voltage value received
Voltage threshold is display screen terminal voltage rated value) when to power management chip 2 send the supply voltage that will provide to display screen
The power source output command signal of promotion.
Moreover, subtracting the difference of the display screen terminal voltage value received from voltage acquisition chip 3 according to predetermined voltage threshold
Value determines lifting values when promoting the supply voltage provided to display screen.
Moreover, main control chip 1 in the display screen terminal voltage value received than predetermined voltage threshold (for example, predetermined voltage
Threshold value is display screen terminal voltage rated value) it high will be provided to the transmission of power management chip 2 to display screen when being more than predetermined difference value
Supply voltage reduce power source output command signal.
For example, the display screen is LCD display.
That is, main control chip 1 is the control unit of whole system.It is responsible for voltage required for setting lighting, simultaneously
The voltage of real-time acquisition terminal, to be compensated to the loss of power on route.Power management chip 2 is by mature power supply pipe
Reason chip is built, it and main control chip and the voltage sample chip of surrounding constitute closed-loop control, to guarantee that power supply exports
Stability.Voltage acquisition chip 3 is used as the acquisition of terminal voltage.Because the line loss of power supply power supply is since entire circuit exists
Line resistance, and once there is electric current to pass by, it will necessarily result in pressure drop generation, cause from voltage after the voltage output to terminal that source exports
Less than source.And terminal is utilized to sample, it returns on this paths of voltage sample chip, due to the input of voltage sample chip
Resistance is very high, therefore and pressure drop is not present.System in this way is it is known that accurate voltage values of terminal at this time, to do power supply tune
It is whole.
Preferred embodiment display screen, which powers on voltage-stabilizing power supply system, according to the present invention not will increase the risk of burn-in
In the case of solve the problems, such as the loss for causing power supply from source to terminal due to walking long line very well, to be supplied to the most suitable electricity of lighting
Source improves the lighting effect of lighting-up equipment.
Fig. 2 is the flow chart that display screen according to the preferred embodiment of the invention powers on pressure stabilizing method of supplying power to.For example, Fig. 2 institute
The display screen according to the preferred embodiment of the invention shown power on pressure stabilizing method of supplying power to can use it is shown in FIG. 1 excellent according to the present invention
The display screen of embodiment is selected to power on voltage-stabilizing power supply system.
Specifically, as shown in Fig. 2, display screen according to the preferred embodiment of the invention powers on pressure stabilizing method of supplying power to includes:
First step S1: before (that is, before system is first powered on) progress of voltage acquisition chip 3 power supply output, voltage is adopted
Collect chip 3 and execute an initialization voltage acquisition, and collection result is sent to main control chip 1 to calibration measurement result；
Specifically, the voltage value DA1 obtained at this time is the quiescent dissipation under original state, it can be used for the calibration of collection value below.
Second step S2: main control chip 1 is after receiving voltage setup parameter, according to controlling power supply after voltage setup parameter
The power supply of managing chip 2 exports to power on to system；Then by the power supply sampling A/D chip of acquisition source, closed loop is carried out
It adjusts, stablizes until power supply exports, accurate setting value.At this point it is possible to the output identification position of power supply is subjected to set processing, with
Just indicate that system source power supply has adjusted completion.
The voltage that power management chip 2 exports is voltage required for display screen.For example, if required for output screen
3.3V voltage, first controller can adjust power supply chip and export stable 3.3V.The flag set that adjusting can be finished at this time.But
Due to being lost on line, terminal voltage is less than 3.3V's at this time.
Third step S3: the sampling of display screen terminal voltage is executed constantly using voltage acquisition chip 3 with acquisition terminal electricity
Pressure；If when lighting, used voltage has biggish electric current all the way for this, then exist due to impedance on line, end at this time
The value that end voltage acquisition arrives can be less than source voltage terminal.And the circuit passed by using one without electric current, the then both ends in this circuit
Pressure drop is not present in voltage.Therefore the sampling A/D chip of source can accurately collect the power conditions of terminal.
For example, powering on flag set when detecting, then system will do it terminal voltage acquisition.Because acquiring this line is not
Electric current is walked, so terminal voltage DA2 can be collected accurately.
Four steps S4: judging whether display screen terminal voltage value is lower than predetermined voltage threshold, if display screen terminal electricity
Pressure value is lower than predetermined voltage threshold, and then power management chip 2 promotes the supply voltage provided to display screen.
For example, the value that DA2-DA1 is obtained is actual voltage regulated value.At this point, if the voltage of terminal is less than the threshold of setting
It is worth (such as 3.2V), then appropriate can raises voltage at this time and carry out terminal compensation；If being higher than threshold voltage, such as can will be electric
Source shutdown carries out malfunction elimination.
Since third step S3 executes the sampling of display screen terminal voltage constantly using voltage acquisition chip 3 with acquisition terminal
It is accurate to obtain terminal so can handle again collection value and first time collected value after four steps S4 for voltage
Voltage value, then the value is compared with the power values of setting.Boost operations are carried out if being less than threshold value.Then circulation is held
Row, until allowing this power supply to export accurately is sent to terminal.
Preferred embodiment display screen, which powers on pressure stabilizing method of supplying power to, according to the present invention not will increase the risk of burn-in
In the case of solve the problems, such as the loss for causing power supply from source to terminal due to walking long line very well, to be supplied to the most suitable electricity of lighting
Source improves the lighting effect of lighting-up equipment.
The preferred embodiment of the present invention has shown and described in above description, as previously described, it should be understood that the present invention is not office
Be limited to form disclosed herein, should not be regarded as an exclusion of other examples, and can be used for various other combinations, modification and
Environment, and can be changed within that scope of the inventive concept describe herein by the above teachings or related fields of technology or knowledge
It is dynamic.And changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, then it all should be appended by the present invention
In scope of protection of the claims.
Claims (9)
1. a kind of display screen powers on voltage-stabilizing power supply system, characterized by comprising: main control chip, power management chip and voltage are adopted
Collect chip；Wherein, voltage acquisition chip acquires display screen terminal voltage for executing the sampling of display screen terminal voltage, and will
Collected display screen terminal voltage value is sent to main control chip；Main control chip is used for according to voltage setup parameter or from voltage
The display screen terminal voltage value that acquisition chip receives sends power source output command signal to power management chip；Power management
Chip is used for according to the power source output command signal that receives from main control chip, executes power supply output to display screen with to display screen
Supply voltage is provided.
2. display screen as described in claim 1 powers on voltage-stabilizing power supply system, which is characterized in that main control chip is aobvious what is received
It is sent when display screen terminal voltage value is lower than predetermined voltage threshold to power management chip and the supply voltage provided to display screen is provided
The power source output command signal risen.
3. display screen as claimed in claim 2 powers on voltage-stabilizing power supply system, which is characterized in that subtracted according to predetermined voltage threshold
The difference of the display screen terminal voltage value received from voltage acquisition chip determines and promotes the supply voltage provided to display screen
When lifting values.
4. display screen as claimed in claim 1 or 2 powers on voltage-stabilizing power supply system, which is characterized in that main control chip is receiving
Display screen terminal voltage value it is higher than predetermined voltage threshold be more than predetermined difference value when to power management chip transmission will be to display screen
The power source output command signal that the supply voltage of offer reduces.
5. display screen as claimed in claim 2 powers on voltage-stabilizing power supply system, which is characterized in that predetermined voltage threshold is display screen
Terminal voltage rated value.
6. display screen as claimed in claim 1 or 2 powers on voltage-stabilizing power supply system, which is characterized in that display screen is that LCD is shown
Screen.
7. a kind of display screen powers on pressure stabilizing method of supplying power to, characterized by comprising:
First step: before voltage acquisition chip carries out power supply output, voltage acquisition chip executes an initialization voltage acquisition,
And collection result is sent to main control chip to calibration measurement result；
Second step: main control chip is after receiving voltage setup parameter, according to control power management core after voltage setup parameter
The power supply of piece exports to power on to system；
Third step: the sampling of display screen terminal voltage is executed constantly using voltage acquisition chip with acquisition terminal voltage；
Four steps: judging whether display screen terminal voltage value is lower than predetermined voltage threshold, if display screen terminal voltage value is low
In predetermined voltage threshold then power management chip by the supply voltage provided to display screen promoted.
8. display screen as claimed in claim 7 powers on pressure stabilizing method of supplying power to, which is characterized in that subtracted according to predetermined voltage threshold
The difference of the display screen terminal voltage value received from voltage acquisition chip determines and promotes the supply voltage provided to display screen
When lifting values.
9. display screen as claimed in claim 7 or 8 powers on pressure stabilizing method of supplying power to, which is characterized in that display screen is that LCD is shown
Screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710707483.2A CN109407356B (en) | 2017-08-17 | 2017-08-17 | Power-on voltage-stabilizing power supply system and method for display screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710707483.2A CN109407356B (en) | 2017-08-17 | 2017-08-17 | Power-on voltage-stabilizing power supply system and method for display screen |
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| CN109407356A true CN109407356A (en) | 2019-03-01 |
| CN109407356B CN109407356B (en) | 2021-12-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113257170A (en) * | 2021-06-17 | 2021-08-13 | 深圳市新龙鹏科技有限公司 | TypeC device power correction method, device, equipment and storage medium |
| WO2023056851A1 (en) * | 2021-10-09 | 2023-04-13 | 北京比特大陆科技有限公司 | Voltage monitoring method and apparatus, electronic device and storage medium |
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| Publication number | Publication date |
|---|---|
| CN109407356B (en) | 2021-12-03 |
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