CN109192155A - The method that Tconless LCD TV carries out screen flicker debugging automatically - Google Patents
The method that Tconless LCD TV carries out screen flicker debugging automatically Download PDFInfo
- Publication number
- CN109192155A CN109192155A CN201811057639.8A CN201811057639A CN109192155A CN 109192155 A CN109192155 A CN 109192155A CN 201811057639 A CN201811057639 A CN 201811057639A CN 109192155 A CN109192155 A CN 109192155A
- Authority
- CN
- China
- Prior art keywords
- tconless
- lcd
- measurement index
- carries out
- optical flare
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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
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
Abstract
The invention discloses the methods that Tconless LCD TV carries out screen flicker debugging automatically, comprising the following steps: Step 1: showing that flicker debugs picture in Tconless TV display screen；Step 2: reading the data that can measure luminous flux on tv display screen in real time by photoinduction equipment；And the measurement index of optical flare degree is calculated；Then register is controlled from the Vcom voltage of trend screen voltage management chip by IIC and new register parameters is written；Step 3: step 1 and two is repeated, until the measurement index of optical flare degree reaches minimum value；Step 4: when by the measurement index minimum of optical flare degree corresponding vcom voltage control register value, be written to by IIC in the memory of screen voltage management chip, to complete to debug.This method greatly improves the production efficiency of whole set of television, and measurement is more acurrate, and reduces human factor negative effect caused by complete machine display effect.
Description
Technical field
The present invention relates to a kind of methods of video screen flicker debugging, and in particular to a kind of Tconless LCD TV is automatic
The method for carrying out screen flicker debugging, belongs to liquid crystal display debugging technique field.
Background technique
So-called screen flicker (flicker) is exactly the splashette phenomenon that we often say.And embody the most direct indicator of flicker
It is exactly light beats depth, reaches within 25% imperceptible as long as human eye as long as light beats depth, also without uncomfortable feeling.Liquid
The driving design of crystalline substance screen determines that flicker is always existed, and cannot be completely eliminated, but by adjusting public electrode voltages
(vcom voltage) can reduce this flashing as much as possible.
In general there are two types of modes for the debugging of flicker: one is by adjusting the common electrical in liquid crystal display drive circuit
Electrode resistance, to achieve the purpose that adjustment weakens flicker；Another way is to be joined target Vcom voltage by complete machine software
Number is written in screen voltage management chip, to make Vcom voltage change, to reduce this flickering.
Both modes are all that grayscale picture is shown on LCD screen in debugging, by eye-observation flashing state,
Then Vcom voltage is adjusted by one of both modes, flickering is made to reach minimum.Both modes require people
Work judges flashing state, and carries out voltage modifications according to the feedback of human eye, circulation debugging, is subject to optimum state, application condition
Greatly, and debugging efficiency is very low.
Summary of the invention
It is big in order to solve manual debugging error it is an object of the invention to overcome the prior art, it is low to recycle manual debugging efficiency
The problem of, provide a kind of method that Tconless LCD TV carries out screen flicker debugging automatically.
The present invention is implemented as follows:
The method that Tconless LCD TV carries out screen flicker debugging automatically, comprising the following steps:
Step 1: showing what grayscale (128,128,128) and black rank interweaved in Tconless TV display screen
Flicker debugs picture；
Step 2: reading TV in real time in display flicker debugging figure by the photoinduction equipment for forming circuit with TV
The data that can measure luminous flux on display screen when piece；And optical flare is calculated according to the data that can measure luminous flux
The measurement index of degree；Then register is controlled from the Vcom voltage of trend screen voltage management chip by IIC and new deposit is written
Device parameter；
Step 3: step 1 and two is repeated, until the measurement index of optical flare degree reaches minimum value；
Step 4: when by the measurement index minimum of optical flare degree corresponding vcom voltage control register value, pass through IIC
It is written in the memory of screen voltage management chip, to complete to debug.
Further scheme is:
The data that luminous flux can be measured include but is not limited to voltage, instantaneous brightness value.
Further scheme is:
The measurement index of the optical flare degree includes but is not limited to light beats depth.
Further scheme is:
In step 2, the data that can measure luminous flux measured every time are fed back by serial ports to TV motherboard, by
TV motherboard software is calculated as the measurement index of optical flare degree.
Further scheme is:
The measurement index of the optical flare degree is light beats depth, the calculation formula of light beats depth x are as follows:Wherein, max is highlight flux, and min is minimum luminous flux.
Further scheme is:
In step 2, the Vcom voltage of new register parameters can make the measurement index of optical flare degree become smaller, if cannot
So that the measurement index of optical flare degree is become smaller, then next Vcom voltage is written.
This method detects screen flicker index by light sensation equipment, and is automatically fed to whole set of television, TV software according to
Feedback states carry out adjust automatically Vcom voltage.This method greatly improves the production efficiency of whole set of television, and measurement is more acurrate, and subtracts
Human factor negative effect caused by complete machine display effect is lacked.
Detailed description of the invention
Fig. 1 is the relational graph of Vcom voltage register and light beats depth；
The flicker that Fig. 2 is grayscale (128,128,128) and black rank interweaves debugs picture；
Fig. 3 is that Tconless LCD TV carries out screen flicker debugging system block diagram automatically.
Specific embodiment
The present invention is further illustrated in the following with reference to the drawings and specific embodiments.
The method that Tconless LCD TV carries out screen flicker debugging automatically, as shown in Fig. 3, LCD TV, which plays, to be adjusted
Attempt piece, instantaneous photometer acquires screen intensity, and feeds back to LCD TV, and LCD TV complete machine software is obtained by calculating
Optimal vcom value, specifically includes the following steps:
Step 1: playing specific flicker debugging picture on HDMI player, and the access of HDMI signal is needed to adjust
The Tconless LCD TV of examination；Picture is as shown in Fig. 2, i.e. the flicker tune of grayscale (128,128,128) and black rank intertexture
Attempt piece；The image of attached drawing 2 is amplified effect picture, and practical is that grayscale and black rank show every single pixel row.
Step 2: reading display of the TV when showing that flicker debugs picture in real time by Photometer for Flashing Light PR-110
The luminous flux of fixed point on screen, the value read send TV motherboard to by RS232 interface.Television receives one every 100ms
The data that secondary PR-100 is sent, read 5 seconds values, and are stored in array, read highlight flux max and minimum in 2 seconds
Luminous flux min, and calculate light beats depth (fluctuation depth)
Step 3: TV motherboard receives luminous flux, and after calculating fluctuation depth, by IIC from trend screen voltage pipe
New Vcom voltage parameter is written in reason chip；
Step 4: step 2 and step 3 are repeated, until calculated light beats depth reaches minimum value.
Further, by the calculated fluctuation depth (flickerValue0) of TV motherboard and current in step 3
The corresponding register value of Vcom voltage (vcomValue0) be stored in global variable, new Vcom voltage register value is set
(vcomValue1), and fluctuation depth (flickerValue1) adjusted is obtained, and be stored in corresponding global variable.
FlickerValue0 and flickerValue1 are compared, fluctuation deep minimum is stored in flickerValue0,
And corresponding Vcom voltage register value is stored in vcomValue0.
Further, at the vcomValue0 of default, flickerValue0 is read, increases vcomValue0 and obtains
New vcomValue1, reads flickerValue1, and flickerValue0 is greater than flickerValue1, then shows to fluctuate
Depth is reducing, and needs to continue growing vcomValue.Conversely, flickerValue0 is less than flickerValue1, then show wave
Dynamic depth is increasing, and at this moment needs to reduce vcomValue.During vcomValue is increased or reduced, as long as
When the reversion of size direction occurs again for flickerValue, then it is assumed that vcomValue0 at this time is corresponding
FlickerValue0 is minimum, and effect is optimal.
Step 5: the vcomValue0 of state optimization is written in the memory of screen voltage management chip by IIC, from
And complete debugging.
Wherein, attached drawing 1 shows the relational graph of Vcom voltage register Yu light beats depth, and abscissa indicates vcom voltage
The value range of register 0~255, ordinate indicate light beats depth.It can be seen that as vcom voltage register values are opened from 0
Beginning changes to 255, and light beats depth slowly becomes smaller, and starts slowly to become larger again after reaching minimum value.
Although reference be made herein to invention has been described for explanatory embodiment of the invention, and above-described embodiment is only this hair
Bright preferable embodiment, embodiment of the present invention are not limited by the above embodiments, it should be appreciated that those skilled in the art
Member can be designed that a lot of other modification and implementations, these modifications and implementations will fall in principle disclosed in the present application
Within scope and spirit.
Claims (6)
- The method that 1.Tconless LCD TV carries out screen flicker debugging automatically, it is characterised in that the following steps are included:Step 1: showing grayscale (128,128,128) and the flicker that black rank interweaves in Tconless TV display screen Debug picture；Step 2: reading TV in real time when showing that flicker debugs picture by the photoinduction equipment for forming circuit with TV Display screen on the data that can measure luminous flux；And optical flare degree is calculated according to the data that can measure luminous flux Measurement index；Then register is controlled from the Vcom voltage of trend screen voltage management chip by IIC and new register ginseng is written Number；Step 3: step 1 and two is repeated, until the measurement index of optical flare degree reaches minimum value；Step 4: when by the measurement index minimum of optical flare degree corresponding vcom voltage control register value, be written by IIC Into the memory of screen voltage management chip, to complete to debug.
- 2. the method that Tconless LCD TV carries out screen flicker debugging automatically according to claim 1, it is characterised in that:The data that luminous flux can be measured include voltage, instantaneous brightness value.
- 3. the method that Tconless LCD TV carries out screen flicker debugging automatically according to claim 2, it is characterised in that The measurement index of the optical flare degree is light beats depth.
- 4. the method that Tconless LCD TV carries out screen flicker debugging automatically according to claim 3, it is characterised in that:In step 2, the data that can measure luminous flux measured every time are fed back by serial ports to TV motherboard, by TV Mainboard software is calculated as the measurement index of optical flare degree.
- 5. the method that Tconless LCD TV carries out screen flicker debugging automatically according to claim 4, it is characterised in that The calculation formula of the light beats depth x are as follows:Wherein, max is highlight flux, and min is minimum Luminous flux.
- 6. the method that Tconless LCD TV carries out screen flicker debugging automatically according to claim 1, it is characterised in that In step 2, the Vcom voltage of new register parameters can make the measurement index of optical flare degree become smaller, if cannot make optical flare The measurement index of degree becomes smaller, then next Vcom voltage is written.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114268754A (en) * | 2021-12-23 | 2022-04-01 | 四川长虹电器股份有限公司 | Method for writing Flicker debugging value of Tconless liquid crystal television |
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| CN114268754A (en) * | 2021-12-23 | 2022-04-01 | 四川长虹电器股份有限公司 | Method for writing Flicker debugging value of Tconless liquid crystal television |
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