CN105895034A - Backlight adjustment system and backlight brightness adjustment method - Google Patents
Backlight adjustment system and backlight brightness adjustment method Download PDFInfo
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- CN105895034A CN105895034A CN201610446445.1A CN201610446445A CN105895034A CN 105895034 A CN105895034 A CN 105895034A CN 201610446445 A CN201610446445 A CN 201610446445A CN 105895034 A CN105895034 A CN 105895034A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims description 36
- 230000001105 regulatory effect Effects 0.000 claims description 28
- 230000003287 optical effect Effects 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 239000000523 sample Substances 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 6
- 230000000052 comparative effect Effects 0.000 claims description 2
- 238000009499 grossing Methods 0.000 claims 1
- 230000001131 transforming effect Effects 0.000 abstract 1
- 239000000758 substrate Substances 0.000 description 8
- 239000012528 membrane Substances 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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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
- 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
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- General Physics & Mathematics (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal Display Device Control (AREA)
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Abstract
The invention provides a backlight adjustment system applied to a half-transmitting and half-reflecting liquid crystal display. The backlight adjustment system comprises a light sensing module, a first calculation module, a judgment module, a second calculation module and a setting module which are electrically connected in sequence, wherein the light sensing module is used for receiving an environment light signal, transforming the environment light signal into an electric signal and transmitting the electric signal to the first calculation module; the first calculation module is used for calculating a display brightness value of a reflection area according to the received electric signal; a backlight source is turned on or off under the control of the judgement module according to the calculation result of the first calculation module; the second calculation module is used for calculating a current value required for the backlight source when the backlight source is turned on; and the setting module is used for setting the current value calculated by the second calculation module as a drive current value of the backlight source. The invention further provides a backlight brightness adjustment method. The backlight adjustment system and the backlight brightness adjustment method can save the electric energy and meet use requirements at the same time.
Description
Technical field
The present invention relates to Display Technique field, especially relate to a kind of backlight regulating system and adjusting backlight luminance
Method.
Background technology
Liquid crystal display has irreplaceable status in modem display devices, and it is widely used in portable
The display device of formula mobile electronic product, such as mobile products such as mobile phone, digital camera, palm PC, GPRS
Product.Box-like is typically become with array base palte by panel of LCD by color membrane substrates, the sky between two substrates
Liquid crystal layer it is packaged with, owing to liquid crystal molecule self is the most luminous, it is desirable to provide light source between.Therefore, technology people
Member using how to select with control light source and improve light source utilization rate reduce the electric quantity consumption of light source as liquid crystal simultaneously
The important content of Display Technique research.
In prior art, backlight luminescence is used to provide backlight to be the main side that liquid crystal display obtains light source
Formula.But the ratio that the permeable light of backlight accounts for backlight transmitting light is less, and backlight utilization rate is the highest,
The electricity that backlight is consumed accounts for the 70%~90% of whole equipment power dissipation, owing under duty, backlight is always
Being in the brightest and for high-high brightness state, backlight electric quantity consumption is huge.
Summary of the invention
The technical problem to be solved in the present invention is to provide the side of a kind of backlight regulating system and adjusting backlight luminance
Method, solves backlight electric quantity consumption in prior art bigger, it is impossible to meets simultaneously and had both adapted to various building ring
Border, the again problem of energy minimization electrical source consumption.
For solving above-mentioned technical problem, on the one hand, the present invention provides a kind of backlight regulating system, is applied to half
Semi-reflection liquid crystal display thoroughly, it is characterised in that: described backlight regulating system includes the photosensitive mould being sequentially connected electrically
Block, the first computing module, judge module, the second computing module and setting module, described illuminant module receives
Ambient light signal is converted into the signal of telecommunication and is delivered to described first computing module, and described first computing module is according to connecing
The described signal of telecommunication received calculates echo area display brightness value, and described judge module is according to the first computing module
Result of calculation controls described backlight and opens or closes, and described second computing module is when described backlight is opened
Calculating the current value that described backlight needs, described second computing module is calculated by described setting module
Current value is set as the driving current value of described backlight.
Further, described backlight regulating system controls the described backlight of semi-transmission semi-reflection LCD, institute
Stating semi-transmission semi-reflection LCD and include echo area and transmission area, described echo area includes reflecting layer, described
The ambient light that echo area is reflected using described reflecting layer is as work light, and described transmission area is with described backlight
The light provided is as work light.
Further, described reflecting layer includes the reflecting surface of smooth shape, described first computing module utilize described instead
The signal of telecommunication of the reflectance and the transmission of described illuminant module of penetrating face is calculated described echo area brightness value.
Further, described judge module includes receiver module, standard module and control module, described judgement mould
Block includes that receiver module, standard module and control module, described receiver module receive the meter of the first computing module
Calculating result, described standard module receives the system brightness value needing display set in advance, described control module
Relatively described echo area display brightness value and the brightness value needing display set in advance, and according to comparative result
Control described backlight to open or close.
Further, described second computing module includes transmission computing module, backlight computing module and Current calculation
Module, it is bright with described echo area that described transmission computing module calculates the brightness value needing to show set in advance
The difference of angle value obtains transmission area display brightness value, and calculates transmission area by backlight computing module and show bright
Angle value and transmission area to the ratio of the transmitance of light to obtain backlight display brightness value, described Current calculation mould
Block calculates the driving current value of described backlight, and the driving current value of described backlight is that described backlight shows
Brightness value and the ratio of electric current brightness transition coefficient.
Further, the area of described echo area is more than the area of described transmission area.
Further, described illuminant module includes sensitive probe and signal conversion module, and described sensitive probe receives
Described optical signal is also converted to the signal of telecommunication by described signal conversion module and exports by optical signal.
Further, described setting module electrically connects with described backlight, the driving electricity that described setting module sets
Flow valuve controls described back light source brightness.
On the other hand, the present invention provides a kind of method of adjusting backlight luminance, including:
Thering is provided backlight regulating system, described backlight regulating system includes illuminant module, the first computing module, sentences
Disconnected module, the second computing module and setting module,
The optical signal of ambient light is converted into the signal of telecommunication by described illuminant module and is sent to described first calculating mould
Block;
Described first computing module calculates echo area display brightness value according to the described signal of telecommunication received;
The result of calculation of described first computing module compares in described judge module and mates, described in sentence
Disconnected module controls described backlight according to the result of calculation of the first computing module and opens or closes, described second meter
Calculating module and calculate the current value that backlight needs when described backlight is opened, described setting module is by described
The current value that second computing module calculates is set as the driving current value of described backlight.
Further, " optical signal of ambient light is converted into the signal of telecommunication by described illuminant module and is sent to described
First computing module " step includes: described illuminant module includes sensitive probe and signal conversion module, environment
After optical signal is received by described sensitive probe, then by described signal conversion module, described optical signal is converted to
The signal of telecommunication is to described first computing module output.
Beneficial effects of the present invention is as follows: the method for backlight regulating system and regulation backlight controls Transflective
The backlight of liquid crystal display, when echo area display brightness meets the brightness value that these needs show, backlight
Close, only echo area work, energy saving;Echo area display brightness can not meet that these needs show bright
During angle value, backlight partially opens, and the degree specifically opened is passed through accurately to calculate, and by changing lamp
The drive current adjustment brightness of bar, the echo area brightness value that on-the-job satisfaction needs simultaneously with transmission area and maximum
Limit reduce electrical source consumption.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying
On the premise of going out creative work, it is also possible to obtain other obvious mode of texturing according to these accompanying drawings.
The backlight regulating system structural representation that Fig. 1 provides for the embodiment of the present invention;
The semi-transmission semi-reflection LCD backlight that Fig. 2 provides for the embodiment of the present invention closes work sheet;
The semi-transmission semi-reflection LCD backlight that Fig. 3 provides for the embodiment of the present invention opens work sheet.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, be fully described by, it is clear that described embodiment be only a part of embodiment of the present invention rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.
The backlight regulating system structural representation that Fig. 1 provides for the embodiment of the present invention, backlight regulating system is applied
In semi-transmission semi-reflection LCD, with reference to Fig. 2 and Fig. 3, semi-transmission semi-reflection LCD includes liquid crystal
Showing panel and backlight 10, wherein display panels includes echo area 01 and transmission area 02, echo area 01
Rely on the reflective surface ambient light 11 in reflecting layer 30.When only echo area 01 works, backlight 10 is closed,
When echo area 01 and transmission area 02 work simultaneously, backlight 10 is opened.Backlight 10 is made up of LED
LED lamp bar combines, and can be changed the brightness of LED by the driving current value controlling LED,
The i.e. brightness of backlight.Backlight regulating system controls semi-transmission semi-reflection LCD and is in above two work
The brightness turning off or on and opening of the backlight 10 during state.
Backlight regulating system includes illuminant module the 102, first computing module 104, judge module 106, second
Computing module 108 and setting module 110.Ambient light is irradiated on the sensitive probe 1022 of illuminant module 102,
And by signal conversion module 1024, the optical signal that ambient light provides is converted into the signal of telecommunication and is sent to the first calculating mould
Block 104, ambient light signal is the brightness of ambient light 11.First computing module 104 utilizes environment bright
Degree × reflecting layer reflectance obtains echo area brightness.The receiver module 1062 of judge module 106 receives this result,
Standard module 1064 receives the brightness needing display of default simultaneously, and control module 1066 is by echo area
Brightness compares with the brightness needing display, in a kind of embodiment, control module 1066 use 4 micro-
Control unit.When echo area brightness is more than when needing the brightness shown, control module 1066 sends instruction and closes
Backlight 10;When echo area brightness is less than when needing the brightness shown, control module 1066 sends instruction and opens
Backlight 10, and echo area brightness is sent to the second computing module 108 with the signal of telecommunication.Second computing module
108 include processing the transmission computing module 1082 of signal, backlight computing module 1084 and Current calculation mould successively
Block 1086, transmission computing module 1082 calculates the brightness the needing display difference with echo area brightness as transmission
District's brightness, backlight computing module 1084 utilizes absorbance to be back light source brightness by transmission area brightness transition, electric current
Computing module 1086 utilizes electric current/brightness transition coefficient calculations for obtaining the driving that this back light source brightness need to provide
Electric current.Setting module 110 receives the result of calculation of current calculation module 1086, and sets it to LED
The driving electric current of lamp, directly controls the brightness of LED.
Backlight regulating system, by judging that ambient light intensity changes backlight duty, makes Transflective liquid
Crystal display selects to save most the mode of operation of power supply, it is ensured that on the basis of display normally shows image
Meet the requirement of energy saving.
Refer to Fig. 2, under outdoor or indoor bright light environments, only echo area 01 works, and backlight 10 is closed,
Ambient light 11 sequentially passes through color film polaroid 502, color membrane substrates 202, public electrode 602 and liquid crystal 70,
Reflecting on the smooth reflecting surface in reflecting layer 30, reflection light sequentially passes through liquid crystal 70, public electrode
602, color membrane substrates 202 and color film polaroid 502 show image on display panels surface.The most anti-
The surface of emission area penetrating layer 30 is big as far as possible, and the area increasing echo area 01 can reflect more ambient light
Line 11.
In the duty of only echo area 01 work, ambient light 11 is reflected and as light source by reflecting layer 30
Show image at display floater, greatly reduce the electric quantity consumption of equipment, and be effectively utilized ambient light.
Refer to Fig. 3, under outdoor or indoor dark surrounds, transmission area 02 and echo area 01 cooperation, the back of the body
Light source 10 is opened, and backlight regulating system regulates the back light source brightness that need to provide according to environmental light brightness.Backlight light
Line 104 sequentially passes through array polaroid 504, array base palte 204, liquid crystal at the transmission area 02 of liquid crystal panel
70, color membrane substrates 202 and color film polaroid 502 show that image enters human eye.Backlight light 12 penetrates liquid
After the transmission area 02 of crystal panel, it is total to the faint ambient light 12 of the emission layer 30 of echo area 01 reflection
Same-action forms image on a display panel.Wherein, reflecting layer 30 relies on transparent resin bed 40 to be fixed on
Between color membrane substrates 202 and array base palte 204, in a kind of embodiment, reflecting layer 30 and color membrane substrates 202
Between the half that distance is the distance between array base palte 204 and color membrane substrates 202 so that enter liquid
The equivalent optical path of the light of transmission area 02 and echo area 01 in crystal panel, to ensure transmission area 02 and echo area
The aberration of 01 is less and matching in color.
Echo area 01 and the cooperative duty of transmission area 02 make liquid crystal display can meet at light relatively
The demand worked under weak or dark working environment, ambient light 11 and backlight light 12 are liquid jointly simultaneously
Crystal panel provides light source, relies on back light to provide light source compared to simple, and this working method reduces and carried on the back
The electric quantity consumption of light source, the adjustable feature of back light source brightness reasonably employs backlight simultaneously, further
Reduce the power consumption of liquid crystal display.
The method of backlight regulating system adjusting backlight luminance is as follows:
Step 1, the sensitive probe 1022 of illuminant module 102 receive external environment optical signal, signal modulus of conversion
The optical signal that ambient light provides is converted into the signal of telecommunication and is sent to the first computing module 104 by block 1024.
The environmental light brightness that step 2, the first computing module 104 receive according to illuminant module 102 calculates reflection
District 01 display brightness.According to formula: the reflectance in echo area brightness=environmental light brightness × reflecting layer, echo area,
Wherein the reflectance in reflecting layer 30 is fixed value, can measure in advance, calculates echo area brightness.
Step 3, judge module 106 determine backlight duty.Receiver module 1062 receives the first calculating
The echo area luminance signal of module 104 transmission, standard module 1064 receives the bright of the needs display of default
Degree, echo area brightness is compared by control module 1066 with the brightness needing display, and when echo area, brightness is big
In time needing the brightness of display, control module 1066 sends instruction and closes backlight 10;When echo area, brightness is little
In time needing the brightness of display, control module 1066 sends instruction and opens backlight 10, and by echo area brightness
It is sent to the second computing module 108 with the signal of telecommunication.
Step 4, the second computing module 108 calculate the driving electric current of backlight.Transmission computing module 1082 is counted
Calculate transmission area 02 and need the brightness value of display, according to formula: the brightness-reflection of transmission area brightness=needs display
District's brightness, calculates the brightness needing display;Backlight computing module 1084 calculates backlight needs display
Brightness value, according to formula: back light source brightness=transmission area brightness/transmission area transmitance to light;Current calculation mould
Block 1086 calculates the current value of LED, according to formula: the current value=back light source brightness/electric current of LED
Brightness transition coefficient, wherein electric current brightness transition coefficient is known fixed value.
The current value of calculated LED is set as the driving of LED by step 5, setting module 110
Electric current, and directly control the brightness of LED.
It is strong and weak that the adjusting backlight luminance method that the embodiment of the present invention provides experiences ambient light by illuminant module 102
Judge that brightness demand, to determine the switch of backlight, meets in the environmental light brightness reflected with judge module 106
During the brightness value that these needs show, backlight is closed, only echo area work, energy saving;Ring in reflection
When border brightness can not meet the brightness value that these needs show, backlight is opened, and the degree specifically opened
By accurately calculating, and control by changing the current value of LED lamp bar, the method Appropriate application environment
Light, meet needs brightness value and reduce electrical source consumption to greatest extent.
Above disclosed only several preferred embodiment of the present invention, can not limit this with this certainly
Bright interest field, one of ordinary skill in the art will appreciate that all or part of stream realizing above-described embodiment
Journey, and according to the equivalent variations that the claims in the present invention are made, still fall within the scope that invention is contained.
Claims (10)
1. a backlight regulating system, is applied to semi-transparent semi-reflecting liquid crystal display, it is characterised in that: described backlight
Illuminant module that regulation system includes being sequentially connected electrically, the first computing module, judge module, second calculate mould
Block and setting module, described illuminant module reception ambient light signal is converted into the signal of telecommunication and is delivered to described first meter
Calculating module, described first computing module calculates echo area display brightness value according to the described signal of telecommunication received,
Described judge module controls described backlight according to the result of calculation of the first computing module and opens or closes, described
Second computing module calculates the current value that described backlight needs, described setting when described backlight is opened
The current value that described second computing module calculates is set as the driving current value of described backlight by module.
Backlight regulating system the most according to claim 1, it is characterised in that described backlight regulating system control
The described backlight of semi-transmission semi-reflection LCD processed, described semi-transmission semi-reflection LCD includes reflection
District and transmission area, described echo area includes reflecting layer, the ambient light that described echo area is reflected with described reflecting layer
Line is as work light, and the light that described transmission area provides using described backlight is as work light.
Backlight regulating system the most according to claim 2, it is characterised in that described reflecting layer includes smoothing
The reflecting surface of shape, described first computing module utilizes the reflectance of described reflecting surface to transmit with described illuminant module
The signal of telecommunication be calculated described echo area brightness value.
Backlight regulating system the most according to claim 3, it is characterised in that described judge module includes connecing
Receiving module, standard module and control module, described receiver module receives the result of calculation of the first computing module,
Described standard module receives the system brightness value needing display set in advance, and described control module is relatively more described
Echo area display brightness value and the brightness value needing display set in advance, and control described according to comparative result
Backlight opens or closes.
Backlight regulating system the most according to claim 4, it is characterised in that described second computing module bag
Including transmission computing module, backlight computing module and current calculation module, described transmission computing module calculates pre-
The brightness value of display that needs first set obtains transmission area display brightness with the difference of described echo area brightness value
Value, and calculate transmission area display brightness value and the transmission area ratio to the transmitance of light by backlight computing module
Value is to obtain backlight display brightness value, and described current calculation module calculates the driving current value of described backlight,
The driving current value of described backlight is described backlight display brightness value and the ratio of electric current brightness transition coefficient
Value.
Backlight regulating system the most according to claim 2, it is characterised in that the area of described echo area is big
Area in described transmission area.
Backlight regulating system the most according to claim 1, it is characterised in that described illuminant module includes sense
Light probe and signal conversion module, described sensitive probe reception optical signal also will by described signal conversion module
Described optical signal is converted to signal of telecommunication output.
Backlight regulating system the most according to claim 1, it is characterised in that described setting module is with described
Backlight electrically connects, and the driving current value that described setting module sets controls described back light source brightness.
9. the method for an adjusting backlight luminance, it is characterised in that including:
Thering is provided backlight regulating system, described backlight regulating system includes illuminant module, the first computing module, sentences
Disconnected module, the second computing module and setting module,
The optical signal of ambient light is converted into the signal of telecommunication by described illuminant module and is sent to described first calculating mould
Block;
Described first computing module calculates echo area display brightness value according to the described signal of telecommunication received;
The result of calculation of described first computing module compares in described judge module and mates, described in sentence
Disconnected module controls described backlight according to the result of calculation of the first computing module and opens or closes, described second meter
Calculating module and calculate the current value that backlight needs when described backlight is opened, described setting module is by described
The current value that second computing module calculates is set as the driving current value of described backlight.
The method of adjusting backlight luminance the most according to claim 9, it is characterised in that " ambient light
Optical signal is converted into the signal of telecommunication by described illuminant module and is sent to described first computing module " step includes:
Described illuminant module includes sensitive probe and signal conversion module, and ambient light signal is received by described sensitive probe
After, then by described signal conversion module, described optical signal is converted to the signal of telecommunication to described first computing module
Output.
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