CN107945745A - The adjusting method and regulating device of backlight illumination - Google Patents
The adjusting method and regulating device of backlight illumination Download PDFInfo
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- CN107945745A CN107945745A CN201711135448.4A CN201711135448A CN107945745A CN 107945745 A CN107945745 A CN 107945745A CN 201711135448 A CN201711135448 A CN 201711135448A CN 107945745 A CN107945745 A CN 107945745A
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- Prior art keywords
- brightness
- duty cycle
- pulse width
- microprocessor
- value
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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
- G09G3/3406—Control of illumination source
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
Abstract
A kind of adjusting method of backlight illumination of disclosure, including microprocessor calculate pulse width modulated duty cycle initial value and export and give backlight drive module；Each road pulse width modulated duty cycle value is stored in flash memories；Brightness measuring device for camera measures liquid crystal display panel intrinsic brilliance；Pulse width modulated duty cycle value is automatically stepped based on initial value；Microprocessor reconfigures backlight drive module；Optimal brightness is shown on liquid crystal display panel.A kind of backlight illumination regulating device disclosed in the present application includes keyboard；Microprocessor, makes dutyfactor value be automatically stepped based on initial value；Backlight drive module；Flash memories；Liquid crystal display panel；Brightness measuring device for camera；Luminance sensor.The back light brightness regulating method and device of the application can realize automatic measurement brightness and adjust, and select optimum pulse width modulated duty cycle value, liquid crystal display panel is gradually formed brightness step from centre to both sides, strengthen narrow viewing angle display effect.
Description
Technical field
The present invention relates to field of liquid crystal display, and in particular, to a kind of Automatic adjustment method and tune of multichannel backlight illumination
Regulating device.
Background technology
For the liquid crystal display at width visual angle, to increase display effect, current way be by whole backlight panel with
Longitudinally divided multiple regions, the brightness to different zones are adjusted, and longitudinal region brightness is high among backlight panel, bright to both sides
Degree is lower successively, can so increase the display effect of narrow viewing angle.
Fig. 1 shows the fundamental diagram of the method for the adjusting multichannel backlight illumination enhancing display effect of the prior art, first
Input the pulse width modulated duty cycle of every road backlight drive respectively by keyboard, controller can export corresponding pulse width tune
Signal processed, each pulse width modulating signal are input to corresponding backlight drive, because pulse width modulated duty cycle is different, then
It is different to be output to the electric current of corresponding LED, the corresponding backlight area brightness of this string LED is also different, then using brightness measuring device for camera
This regional luminance of measurement liquid crystal display, the normal brightness that this brightness and width visual angle Display Technique personnel are provided contrast,
If it is different, the pulse width modulated duty cycle of every road backlight drive is then ceaselessly adjusted respectively either manually or by keyboard, until measuring
Intrinsic brilliance reaches normal brightness, the corresponding pulse width modulated duty cycle value of storage brightness at this time, all pulse width tune
Dutyfactor value processed is as one group of storage, and under the combination condition, narrow viewing angle effect can be strengthened.
Brightness and the pulse width modulation of backlight drive are proportional relation, i.e. pulse width modulated duty cycle is bigger, brightness
Value is bigger, and pulse width modulated duty cycle is smaller, and brightness value is smaller, multiple more actually measured liquid crystal display brightness value
It is different with normal brightness value difference, go to be manually entered the pulse width modulated duty cycle value of increase or reduction, circulate this step, obtain institute
There is the pulse width modulated duty cycle value of region LED backlight driving corresponding with normal brightness, then store this group pulse width tune
Dutyfactor value processed, can just find out optimal set of pulses width modulated duty cycle value.Hand need to constantly be repeated by adjusting process above
Adjust, regulating time length, heavy workload, and cannot be guaranteed accuracy.
The content of the invention
In view of this, can it is an object of the invention to provide the Automatic adjustment method and regulating device of a kind of backlight illumination
To automatically select out the set of pulses width modulated duty cycle value of most suitable narrow viewing angle display effect, and burning stores.
According to a first aspect of the present invention, there is provided a kind of adjusting method of backlight illumination, including：It is wide that microprocessor calculates pulse
Spend modulation duty cycle initial value and export and give backlight drive module；Each road pulse width modulated duty cycle value is stored in flash memory to deposit
In reservoir；Brightness measuring device for camera measures liquid crystal display panel intrinsic brilliance；Pulse width modulated duty cycle value is based on initial value certainly
Dynamic stepping；Microprocessor reconfigures backlight drive module；And optimal brightness is shown on liquid crystal display panel.
Preferably, the optimal brightness makes the liquid crystal display panel gradually form transverse direction of successively decreasing from intermediate region to both sides
Brightness step.
Preferably, the microprocessor, which calculates pulse width modulated duty cycle initial value and exports, gives backlight drive module,
This step includes microprocessor and calculates corresponding pulse width modulated duty cycle initial value according to screen intensity.
Preferably, show on liquid crystal display panel and further included before optimal brightness step：During readjustment self-adjusting
Data；Show screen display each group of data numbering, keyboard selection；Microprocessor matches somebody with somebody the pulse width modulated duty cycle value on each road
Put to backlight drive.
Preferably, the microprocessor, which calculates pulse width modulated duty cycle initial value and exports, gives backlight drive module,
This step includes the microprocessor corresponding pulse width modulated duty cycle initial value of brightness calculation according to demand.
Preferably, show on liquid crystal display panel and further included before optimal brightness step：Optimal brightness is corresponding each
Road pulse width modulated duty cycle value is stored in flash memories.
Preferably, the pulse width modulated duty cycle value of the backlight drive module based on initial value automatically step including：
When the liquid crystal display panel intrinsic brilliance is brighter, the pulse width modulated duty cycle value is automatically stepped based on the initial value
Reduce 1%, when the liquid crystal display panel intrinsic brilliance is dark, the pulse width modulated duty cycle value is based on the initial value
Automatically step increase by 1%.
According to a second aspect of the present invention, there is provided a kind of regulating device of backlight illumination, including keyboard；Microprocessor, with institute
State keyboard to be connected, the dutyfactor value of output pulse width modulation, and pulse width modulated duty cycle value is based on initial value
Automatically step；Backlight drive module, is connected with the microprocessor, including multichannel backlight drive, and the dutyfactor value is defeated
Enter to the multichannel backlight drive；Flash memories, are connected with the microprocessor, store the dutyfactor value；Liquid crystal
Show panel, be connected with the backlight drive module；Brightness measuring device for camera, is connected with the liquid crystal display panel, and measurement is bright
Degree；And luminance sensor, it is connected with the brightness measuring device for camera and the microprocessor, by the measurement brightness feedback to institute
State microprocessor.
Preferably, the microprocessor is connected by IC bus with the backlight drive module, micro- place
Reason device is connected by serial communication bus with the flash memories.
Preferably, the luminance sensor includes：Hollow frame, the hollow frame are the rectangular of hollow out inside one
Body；Sleeve, containing optical sensor, external line and progress encapsulation process, through two opposite faces of the hollow frame；
Bolt, is fastened on two coplanar parallel seamed edges of the hollow frame, twist-on is on the side of the sleeve；It is and fixed
Stent, it is parallel with the sleeve positioned at the hollow frame both sides；It is characterized in that, the seamed edge of the hollow frame is marked with
Scale, can accommodate it is multiple can be along the sleeve of the scale shift position, the fixing bracket can be along described hollow
Frame is moved in vertical direction.
The adjusting method and regulating device of backlight illumination provided by the invention can realize automatic measurement brightness and carry out certainly
Dynamic adjustment, selects most suitable pulse width modulated duty cycle value, makes liquid crystal display panel gradual from intermediate region to both sides
Horizontal brightness step is formed, enhances narrow viewing angle display effect, and is not required to artificial multiple hand adjustment, it is time saving and energy saving；It can also protect
Multigroup duty cycle data during adjusting is deposited, optimum value is found out in convenient readjustment contrast.And the tune of the backlight illumination of the present invention
Luminance sensor in regulating device can be dismantled flexibly, and brightness measurement can be made more convenient accurate.
Brief description of the drawings
By the description to the embodiment of the present invention referring to the drawings, above-mentioned and other purposes of the invention, feature and
Advantage will be apparent from.
Fig. 1 shows the fundamental diagram of the method for the adjusting multichannel backlight illumination enhancing display effect of the prior art.
Fig. 2 shows the structure diagram of the regulating device of backlight illumination according to embodiments of the present invention.
Fig. 3 shows the fundamental diagram of the regulating device of backlight illumination according to embodiments of the present invention.
Fig. 4 shows the flow chart of the adjusting method of backlight illumination according to a first embodiment of the present invention.
Fig. 5 shows the flow chart of the adjusting method of backlight illumination according to a second embodiment of the present invention.
Fig. 6 shows the liquid crystal display normal work after the adjusting method adjusting of backlight illumination according to embodiments of the present invention
Schematic diagram.
Fig. 7 a show the sectional perspective knot of the luminance sensor of the regulating device of backlight illumination according to embodiments of the present invention
Structure schematic diagram.
Fig. 7 b show the overall three-dimensional knot of the luminance sensor of the regulating device of backlight illumination according to embodiments of the present invention
Structure schematic diagram.
Embodiment
Below based on embodiment, present invention is described, but the present invention is not restricted to these embodiments.Under
It is detailed to describe some specific detail sections in the literary detailed description to the present invention.Do not have for a person skilled in the art
The description of these detail sections can also understand the present invention completely.In order to avoid obscuring the essence of the present invention, known method, mistake
The not narration in detail of journey, flow, element and circuit.
It should be appreciated that in the description of the present invention, " known ", " fixation ", " given " and " predetermined " under normal conditions, refers to
It is a value, quantity, parameter, constraints, condition, state, flow, process, method, implementation, or various combinations etc. are in theory
On be variable, but if set in advance, be to maintain in follow-up use constant.Term " first ", " second " etc. are only
For descriptive purposes, and it is not intended that instruction or hint relative importance.In addition, in the description of the present invention, unless otherwise
Illustrate, " multiple " are meant that two or more.Unless the context clearly requires otherwise, otherwise entire disclosure and claim
The similar word such as " comprising ", "comprising" in book should be construed to the implication included rather than exclusive or exhaustive implication；Also
It is to say, is the implication of " including but not limited to ".
Fig. 2 shows the structure diagram of the regulating device of backlight illumination according to embodiments of the present invention.
The regulating device of the backlight illumination of the embodiment of the present invention includes：Keyboard 101, microprocessor 102, backlight drive module
103, flash memories 104, liquid crystal display panel 105, brightness measuring device for camera 106 and luminance sensor 107.
The brightness value of one group of needs is inputted by keyboard 101, microprocessor 102 is connected with keyboard 101, receives by keyboard
The brightness value of 101 inputs, and calculated according to brightness value and export the initial value of the duty cycle of corresponding pulse width modulation, configure
To next module, and pulse width modulated duty cycle value is set to be automatically stepped based on initial value；Backlight drive module 103 includes more
Road backlight drive, is connected with microprocessor 102, receives the pulse width modulated duty cycle initial value that microprocessor 102 exports
And multichannel backlight drive is input to, different driving currents is produced, drives the corresponding each paths of LEDs lamp of each road backlight drive, is made each
Paths of LEDs lamp is lighted；Flash memories 104 are connected with microprocessor 102, the pulse width tune that storage microprocessor 102 exports
Dutyfactor value processed, facilitates subsequent calls；
Liquid crystal display panel 105 is connected with backlight drive module 103, brightness is controlled by backlight drive module 103, each
Under the action of the backlight drive of road, each paths of LEDs shows different brightness, and liquid crystal display panel 105 shows different luminance areas；Brightness
Measuring device 106 is connected with liquid crystal display panel 105, for measuring the brightness in 105 each region of liquid crystal display panel；Brightness passes
Sensor 107 is connected with brightness measuring device for camera 106 and microprocessor 102, the liquid crystal display panel that brightness measuring device for camera 106 is measured
The intrinsic brilliance value result in 105 each regions feeds back to microprocessor 102, and microprocessor 102 is compared judgement.
Preferably, microprocessor 102 is connected by IC bus with backlight drive 103, and microprocessor 102 passes through
Serial communication bus is connected with flash memories 104, and brightness measuring device for camera 106 is passed by more IC bus and brightness
Sensor 107 is connected.
Preferably, the reality for the liquid crystal display panel 105 that luminance sensor 107 measures brightness measuring device for camera 106
Brightness value is delivered in microprocessor 102, and by itself and one group of needs being inputted by keyboard 101 in microprocessor 102
Brightness value is contrasted, if their difference exceedes certain preset range (such as minus 10 lumen to positive 10 lumen) (difference
Scope can according to circumstances oneself be selected), the dutyfactor value that microprocessor 102 is adjusted with regard to pulse-width is adjusted, pulse
Width modulated duty cycle value is automatically stepped based on initial value, and backlight drive module 103 is allocated to again through microprocessor 102,
Flash memories 104 store the dutyfactor value of the pulse width modulation after adjustment, and brightness is included in LCD display again
On plate 105, then the brightness with the measurement liquid crystal display panel 105 of brightness measuring device for camera 106, passed back by luminance sensor 107 micro-
Processor 102, repeatedly circulation, until actual measurement brightness value is roughly the same with input brightness value.
Preferably, the corresponding initial pulse width modulation duty cycle value of brightness value for one group of needs that keyboard 101 inputs can
Think 50%, pulse width modulated duty cycle value based on initial value automatically step including：Measurement brightness is accounted for more than when needing brightness
Empty ratio automatically steps reduction 1% based on initial value, and for intrinsic brilliance less than when needing brightness, it is automatic that dutyfactor value is based on initial value
Stepping increase by 1%.
After brightness regulation, the middle visual angle of liquid crystal display panel is most bright, and both sides subtract secretly successively, from centre to both sides by
Gradually form horizontal brightness step.
Fig. 3 shows the fundamental diagram of the regulating device of backlight illumination according to embodiments of the present invention.
With reference to Fig. 2, one group of brightness requirement is input to microprocessor first by keyboard, as normal brightness value；Micro- place
Manage device and calculate default pulse width modulated duty cycle initial value, such as 50%, and export and give backlight drive module；The backlight on each road
Driving receives pulse width modulating signal, drives corresponding LED, exports corresponding current, the regional of liquid crystal display panel is shown
Show different brightness；Flash memories save the pulse width modulated duty cycle value on each road at the same time；Then brightness is used
The brightness value in each region of measuring device measurement liquid crystal display panel, sensor will to microprocessor, microprocessor by brightness feedback
The brightness value in each region is surveyed compared with normal brightness value, pulse width modulated duty cycle value automatically steps, and is repeatedly adjusted.
So circulation, when measured value is consistent with normal brightness value, microprocessor is by all pulse width modulated duty cycles at this time
It is worth burning storage.
Fig. 4 shows the flow chart of the adjusting method of backlight illumination according to a first embodiment of the present invention.This method includes step
Rapid S21 to S27.
The adjusting method of the backlight illumination of the embodiment of the present invention is mainly the pulse width modulation by each road backlight drive
Duty cycle difference be adjusted to be shown to LED, so as to control the brightness of each road backlight.
In the step s 21, initialize.Each module of circuit is initialized, one brightness value of input through keyboard.
In step S22, microprocessor, which calculates pulse width modulated duty cycle initial value and exports, gives backlight drive module.
Microprocessor calculates corresponding pulse width modulated duty cycle initial value according to screen intensity, exports and gives backlight drive module, right
Each road backlight drive answered produces electric current, and driving LED light is bright, screen display brightness.
In step S23, each road pulse width modulated duty cycle value is stored in flash memories.Each road backlight is driven
The dutyfactor value of dynamic pulse width modulation is stored in flash memories as one group, convenient follow-up use.
In step s 24, brightness measuring device for camera measurement liquid crystal display panel intrinsic brilliance.Brightness measuring device for camera is placed on
On liquid crystal display panel, for measuring the corresponding intrinsic brilliance of liquid crystal display panel.
In step s 25, microprocessor judges whether to reach optimal brightness.Due to the pulse width modulation of each road backlight
Dutyfactor value is different, and the LED current of corresponding driving is also different, and the regional luminance of the corresponding LCD Panels of LED is also different；With
Testing result is passed back microprocessor after the brightness of each road backlight of brightness measuring device for camera detection, and microprocessor judges that brightness at this time is
It is no suitable, if brightness is suitable, carry out in next step, i.e. step S26；If luminance shortage is to lift display effect, wide to pulse
The duty cycle of degree modulation is readjusted, and performs step S251.
In step S251, pulse width modulated duty cycle value is automatically stepped based on initial value.When previous step detection it is each
, it is necessary to which the duty cycle of pulse-width modulated is readjusted when drive test amount brightness is improper, when screen intensity is brighter, arteries and veins
The duty cycle for rushing width modulated automatically steps reduction 1%；When screen intensity is dark, the duty cycle of pulse width modulation walks automatically
Into increase by 1%.
In step S252, microprocessor reconfigures backlight drive module.It is wide Hou Ge road pulses will to be adjusted
The duty cycle input microprocessor of modulation is spent, microprocessor is adjusted the backlight drive on each road.Then step is re-executed again
Rapid S23 and S24, the dutyfactor value of the pulse width modulation of each road backlight drive is stored in flash memories as one group.
In step S26, judge whether to adjust back the data during self-adjusting.When brightness is more suitable, judge whether
Need adjust back self-regulating process in flash memories store each group pulse width modulation dutyfactor value, if need not if
Terminate adjusting process, the optimum value that the dutyfactor value of the pulse width modulation of last time is adjusted as this；If desired
Readjustment, then perform step S261.
In step S261, the display screen display each group of data set on keyboard is numbered, keyboard selection.Flash memory storage
Device stores the dutyfactor value during multigroup adjusting, if step S26 judges to need the display adjusted back, just set from keyboard
One group needed is selected in the data number of each group dutyfactor value of screen display, keyboard selection is recalled from flash memories.
In step S262, the pulse width modulated duty cycle value on each road is allocated to backlight drive by microprocessor.By key
The set of pulses width modulated duty cycle value of disk selection is input to microprocessor, this group of dutyfactor value is allocated to the back of the body by microprocessor
Optical drive, display panel is bright, observes each regional luminance of liquid crystal display panel.Then step S26 is re-executed, repeatedly readjustment selection
Most suitable one group of dutyfactor value.
In step s 27, optimal brightness is shown on liquid crystal display panel.The optimal each road backlight that will be selected at this time
The dutyfactor value input microprocessor of the pulse width modulation of driving, is allocated to each road driving, is shown on liquid crystal display panel
Optimal brightness.
Fig. 5 shows the flow chart of the adjusting method of backlight illumination according to a second embodiment of the present invention.
The method comprising the steps of S31 to S37.
The method is with respect to the difference of first embodiment, in initial input, by one group of demand of input through keyboard
Normal brightness value, its corresponding pulse width modulated duty cycle initial value is also relatively fixed, but also presets a comparison
Scope.
In step S31, initialization.Each module of circuit is initialized, one demand brightness of input through keyboard, set
One brightness comparison range, here by taking minus 10 lumen to positive 10 lumen as an example.
In step s 32, microprocessor, which calculates pulse width modulated duty cycle initial value and exports, gives backlight drive module.
Microprocessor according to the corresponding pulse width modulated duty cycle initial value of demand brightness calculation of input through keyboard in step S31, than
Such as 50%, export and give backlight drive module, corresponding each road backlight drive produces electric current, and driving LED light is bright, and screen display is bright
Degree.
In step S33, each road pulse width modulated duty cycle value is stored in flash memories.
In step S34, brightness measuring device for camera measurement liquid crystal display panel intrinsic brilliance.This two step and the step of Fig. 4 descriptions
Rapid S23 is identical with step S23.
In step s 35, microprocessor judges whether to reach optimal brightness.Optimal brightness mentioned here refers to that demand is bright
Degree, thus microprocessor by intrinsic brilliance compared with demand brightness, whether within a preset range judge the difference of the two, if
Then carrying out in next step, i.e. step S36；If not existing, the duty cycle of pulse-width modulated is readjusted, and performs step
Rapid S351.
In step S351, pulse width modulated duty cycle value is automatically stepped based on initial value.
In step S352, microprocessor reconfigures backlight drive module.This two step and the step described in Fig. 4
Rapid S251 and step S252 is also identical, repeats no more.
In step S36, the corresponding each road pulse width modulated duty cycle value of optimal brightness is stored in flash memories
In.Judge by step S35, if intrinsic brilliance and the difference of demand brightness are within a preset range, it is believed that be exactly optimal at this time
Brightness value, performs step S36, the pulse width modulated duty cycle value on each road will be ultimately stored on flash memory at this time as one group and deposits
In reservoir, burning storage is carried out afterwards.
In step S37, optimal brightness is shown on liquid crystal display panel.This is walked and the step S27 of Fig. 4 descriptions also phase
Together.
Fig. 6 shows the liquid crystal display normal work after the adjusting method adjusting of backlight illumination according to embodiments of the present invention
Schematic diagram.
When working properly, be switched under narrow viewing angle display pattern, by flash memories storage after overregulating with
The corresponding pulse width modulated duty cycle value of optimal brightness is input to microprocessor, and microprocessor is exported needed for each road backlight drive
Pulse width modulation dutyfactor value, each road backlight drive receives the group pulse bandwidth modulation signals, exports corresponding current,
Drive corresponding LED light bright, form the horizontal brightness step gradually to successively decrease from centre to both sides, and each area of corresponding backlight at this time
The brightness value in domain can just make that visual angle among liquid crystal display panel is brighter, and both sides visual angle is dark, the enhancing of narrow viewing angle display effect.
The regulating device of the backlight illumination of the present invention after the dutyfactor value of the pulse width modulation of configuration Hao Ge roads backlight,
Liquid crystal display panel can show gradient luminance, can be by the brightness for the liquid crystal display panel measured by luminance sensor
Information feeds back to microprocessor, so the luminance sensor is described in detail for the regulating device of above-mentioned backlight illumination.
Fig. 7 a show the sectional perspective knot of the luminance sensor of the regulating device of backlight illumination according to embodiments of the present invention
Structure schematic diagram.
The main element of the luminance sensor of the present embodiment includes sleeve 10, hollow frame 20 and bolt 30.Middle empty frames
Frame 20 is the cuboid of an internal hollow out, and sleeve 10 runs through two opposite faces of hollow frame 20, during bolt 30 is fastened on
On two coplanar parallel seamed edges of empty frames frame 20, twist-on is on the side of sleeve 10.
Sleeve 10 is plastic sleeve, and optical sensor is contained in inside, and optical sensor is included in circular slab 11, circular slab
11 are circumscribed with IC bus on the optical sensor on the lower end of sleeve, circular slab 11, can be connected to backlight illumination
Regulating device on, so sleeve 10 can with external line and need carry out encapsulation process, after sleeve 10 is carried out encapsulation process,
IC bus is placed in outside sealing material again.
Hollow frame 20 is the cuboid of an internal hollow out, and only two opposite sides are that have complete rectangle face
, remaining four side is all hollow, and the inside of hollow frame 20 can be with catch sleeve 10, and sleeve 10 is through hollow frame 20
Two opposite faces in four sides, it is parallel with the side that two have complete rectangle face.
There are two faces parallel with the vertical center line of sleeve 10 in four hollow out faces of hollow frame 20, above-mentioned two
Bolt 30 is set in a face in any one side, and bolt 30 is fastened on two coplanar parallel seamed edges of hollow frame 20, is covering
Place opening corresponding with bolt 30 on the side of cylinder 10,30 twist-on of bolt, can be with adjusting elasticity on the side of sleeve 10, this
Sample can play the role of fastening to sleeve 10, prevent measurement process middle sleeve 10 from producing error displacement.
Preferably, scale is marked with four seamed edges of hollow frame 20, multiple sleeves 10, multiple sleeves 10 can be accommodated
More accurate distance can be moved along above-mentioned scale.Multiple sleeves 10 each other be parallel to each other, shape is in a row, both ends by
Two sides with complete rectangle face block, and the vertical center line and the vertical center line of two end side surfaces of multiple sleeves 10 are equal
On same straight line, coordinate with bolt 30, can in hollow frame 20 shift position.Preferably, multiple sleeves 10
To be fastened in hollow frame 20 and carry out movement vertically or horizontally.
Number it can contain optical sensor according to needed for the size of liquid crystal display panel is put into hollow frame 20
Sleeve 10.
Fig. 7 b show the overall three-dimensional knot of the luminance sensor of the regulating device of backlight illumination according to embodiments of the present invention
Structure schematic diagram.
The luminance sensor of the present embodiment includes sleeve 10, hollow frame 20, bolt 30 and fixing bracket 40, sleeve
10, position relationship between hollow frame 20 and bolt 30 and effect described with Fig. 7 a it is identical, simply shown in Fig. 7 a
A fixing bracket 40 is added on the basis of the main part of luminance sensor.
Fixing bracket 40 is located at 20 both sides of hollow frame, is adapted with hollow frame 20, and parallel with sleeve 10, fixed branch
Frame 40 can be moved along hollow frame 20 in vertical direction, sleeve 10 is adjusted in vertical direction into row position, more effectively
Ground contacts liquid crystal display panel, preferably tests the brightness of liquid crystal display panel different zones.
Brightness measuring device for camera can be moved integrally when appropriate, energy multizone measures brightness at the same time on liquid crystal display panel
Data.Luminance sensor energy flexible operating in the regulating device of the backlight illumination of the present embodiment, is convenient for carrying, and can be certainly
By dismantling, brightness measurement can be made more convenient accurate.
The present invention back light brightness regulating method and regulating device can realize automatic measurement brightness and be automatically adjusted,
Most suitable pulse width modulated duty cycle value is selected, liquid crystal display panel is gradually formed transverse direction from intermediate region to both sides
Brightness step, enhances narrow viewing angle display effect, and is not required to artificial multiple hand adjustment, time saving and energy saving；It can also preserve and adjust
Optimum value is found out in multigroup duty cycle data in journey, convenient readjustment contrast.
Finally it should be noted that：According to the embodiment of the present invention as described above, these embodiments do not have detailed descriptionthe
All details, it is only the specific embodiment also not limit the invention.Obviously, as described above, many repair can be made
Change and change.All any modification, equivalent replacement, improvement and so within spirit and principles of the present invention, should be included in
Within protection scope of the present invention.This specification is chosen and specifically describes the present embodiment, is in order to preferably explain the present invention
Principle and practical application so that skilled artisan can well using the present invention and on the basis of the present invention
Modification use.
Claims (10)
1. a kind of adjusting method of backlight illumination, including：
Microprocessor, which calculates pulse width modulated duty cycle initial value and exports, gives backlight drive module；
Each road pulse width modulated duty cycle value is stored in flash memories；
Brightness measuring device for camera measures liquid crystal display panel intrinsic brilliance；
Pulse width modulated duty cycle value is automatically stepped based on initial value；
Microprocessor reconfigures backlight drive module；And
Optimal brightness is shown on liquid crystal display panel.
2. the adjusting method of backlight illumination according to claim 1, it is characterised in that：The optimal brightness makes the liquid crystal
Display panel gradually forms the horizontal brightness step that successively decreases from intermediate region to both sides.
3. the adjusting method of backlight illumination according to claim 2, it is characterised in that：It is wide that the microprocessor calculates pulse
Spend modulation duty cycle initial value and export and give backlight drive module, this step includes microprocessor and calculates correspondence according to screen intensity
Pulse width modulated duty cycle initial value.
4. the adjusting method of backlight illumination according to claim 3, it is characterised in that shown most on liquid crystal display panel
Further included before good brightness steps：
Adjust back the data during self-adjusting；
Show screen display each group of data numbering, keyboard selection；
The pulse width modulated duty cycle value on each road is allocated to backlight drive by microprocessor.
5. the adjusting method of backlight illumination according to claim 2, it is characterised in that：It is wide that the microprocessor calculates pulse
Spend modulation duty cycle initial value and export and give backlight drive module, this step includes microprocessor, and brightness calculation corresponds to according to demand
Pulse width modulated duty cycle initial value.
6. the adjusting method of backlight illumination according to claim 5, it is characterised in that shown most on liquid crystal display panel
Further included before good brightness steps：The corresponding each road pulse width modulated duty cycle value of optimal brightness is stored in flash memories
In.
7. the adjusting method of backlight illumination according to claim 1, it is characterised in that：
The pulse width modulated duty cycle value of the backlight drive module based on initial value automatically step including：
When the liquid crystal display panel intrinsic brilliance is brighter, it is automatic that the pulse width modulated duty cycle value is based on the initial value
Stepping reduces 1%,
When the liquid crystal display panel intrinsic brilliance is dark, it is automatic that the pulse width modulated duty cycle value is based on the initial value
Stepping increase by 1%.
8. a kind of regulating device of backlight illumination, including
Keyboard；
Microprocessor, is connected with the keyboard, the duty cycle initial value of output pulse width modulation, and makes pulse width tune
Dutyfactor value processed is automatically stepped based on initial value；
Backlight drive module, is connected with the microprocessor, including multichannel backlight drive, and the dutyfactor value is input to institute
State multichannel backlight drive；
Flash memories, are connected with the microprocessor, store the dutyfactor value；
Liquid crystal display panel, is connected with the backlight drive module；
Brightness measuring device for camera, is connected with the liquid crystal display panel, measures brightness；And
Luminance sensor, is connected with the brightness measuring device for camera and the microprocessor, by the measurement brightness feedback to described
Microprocessor.
9. the regulating device of backlight illumination according to claim 8, it is characterised in that：The microprocessor passes through integrated electricity
Road bus is connected with the backlight drive module, and the microprocessor passes through serial communication bus and the flash memories phase
Connection.
10. the regulating device of backlight illumination according to claim 8, it is characterised in that the luminance sensor includes：
Hollow frame, the hollow frame are the cuboids of an internal hollow out；
Sleeve, containing optical sensor, external line and carries out encapsulation process, opposite through two of the hollow frame
Face；
Bolt, is fastened on two coplanar parallel seamed edges of the hollow frame, twist-on is on the side of the sleeve；And
Fixing bracket, it is parallel with the sleeve positioned at the hollow frame both sides；It is characterized in that,
The seamed edge of the hollow frame is marked with scale, can accommodate it is multiple can be along the set of the scale shift position
Cylinder, the fixing bracket can be moved along the hollow frame in vertical direction.
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