CN105047117A - Method for adjusting common voltage of liquid crystal display panel - Google Patents
Method for adjusting common voltage of liquid crystal display panel Download PDFInfo
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- CN105047117A CN105047117A CN201510571678.XA CN201510571678A CN105047117A CN 105047117 A CN105047117 A CN 105047117A CN 201510571678 A CN201510571678 A CN 201510571678A CN 105047117 A CN105047117 A CN 105047117A
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Abstract
The invention provides a method for adjusting the common voltage of a liquid crystal display panel. According to the method, a red optimal common voltage, a green optimal common voltage and a blue optimal common voltage corresponding to a red flicker test image, a green flicker test image and a blue flicker test image are respectively found out; a red brightness weighting factor, a green brightness weighting factor and a blue brightness weighting factor respectively corresponding to a red pure-color image, a green pure-color image and a blue pure-color image are introduced, so that the optimal common voltage of the liquid crystal display panel can be calculated. With the method adopted, when the optimal common voltages of the liquid crystal display panel which are respectively corresponding to the red image, the green image and the blue image are inconsistent, difference among the optimal common voltages of the red image, the green image and the blue image can be offset through the red brightness weighting factor, the green brightness weighting factor and the blue brightness weighting factor, and therefore, the optimal common voltage of the liquid crystal display panel can be found out simply and conveniently, and the deviation of the optimal common voltage which is caused by the difference of response sensitivity of a photosensitive probe to light in different wave lengths can be decreased.
Description
Technical field
The present invention relates to display technique field, particularly relate to a kind of method of adjustable liquid crystal display panel common electric voltage.
Background technology
Liquid crystal display (LiquidCrystalDisplay, LCD) have that fuselage is thin, power saving, the many merits such as radiationless, be widely used, as: LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen or notebook computer screen etc., occupy an leading position in flat display field.
Liquid crystal display major part on existing market is backlight liquid crystal display, and it comprises liquid crystal panel and backlight module (backlightmodule).The principle of work of liquid crystal panel is at thin-film transistor array base-plate (ThinFilmTransistorArraySubstrate, TFTArraySubstrate) with colored filter substrate (ColorFilter, CF) liquid crystal molecule is poured between, and on two plate bases, apply driving voltage to control the sense of rotation of liquid crystal molecule, so that the light refraction of backlight module is out produced picture.
Based on the principle of work of liquid crystal characteristic and LCD, the driving circuit of liquid crystal panel needs deflection voltage and a common electric voltage (V-com) of positive-negative polarity, and wherein, V-com needs the center being arranged on positive and negative deflection voltage.Due to the impact of the factors such as capacitive coupling, as positive-negative polarity deflection voltage misalignment V-com, liquid crystal panel there will be flicker (Flicker), in order to reduce flicker, prior art is usually by the value of adjustment V-com, the flicker of liquid crystal panel is adjusted to minimum, thus makes the display effect of liquid crystal panel reach best, be the best common electric voltage of liquid crystal panel corresponding to the V-com that liquid crystal panel flash is minimum.
The usual use sense light probe of method of existing adjustable liquid crystal display panel common electric voltage obtains the flicker information of liquid crystal panel, the common electric voltage of liquid crystal panel is constantly changed between sensitive probe detection period, best common electric voltage corresponding when finding liquid crystal panel flash minimum, finally the value of this best common electric voltage is write gamma correction chip (P-GammaIC) able to programme, complete the adjustment of the best common electric voltage of liquid crystal panel.Sensitive probe selects photodiode usually, and as shown in Figure 1, the response sensitivity of photodiode to the light of different wave length is different, that is photodiode redness (Red that liquid crystal panel is shown, R), green (Green, G) and the response sensitivity of blue (Blue, B) picture be different.There is liquid crystal panel in actual applications and correspond respectively to the inconsistent situation of the best common electric voltage of red R, green G and blue B picture, because photodiode is to the response sensitivity difference of R, G, B tri-kinds of colored picture, will there is deviation with actual best common electric voltage in best common electric voltage corresponding when the flicker that the grey menu be synthesized together finds is minimum, and then affect the display effect of liquid crystal panel and the shipment quality of liquid crystal panel.
Summary of the invention
The object of the present invention is to provide a kind of method of adjustable liquid crystal display panel common electric voltage, can inconsistent at the best common electric voltage that liquid crystal panel corresponds respectively to redness, green and blue picture, find the best common electric voltage of liquid crystal panel quickly and easily, reduce because sensitive probe is to the deviation of the best common electric voltage caused by the response sensitivity difference of different wave length light, ensure the display effect of liquid crystal panel and the shipment quality of liquid crystal panel.
For achieving the above object, the invention provides a kind of method of adjustable liquid crystal display panel common electric voltage, comprise the steps:
Step 1, flicker sensor liquid crystal panel, sensitive probe being provided and being electrically connected with described sensitive probe;
Step 2, described liquid crystal panel show redness, green and blue flicker test pictures respectively, described sensitive probe and flicker sensor is used to obtain the flicker value of redness, green and blue test pictures of glimmering respectively, and during the display of red, green and blue flicker test pictures, adjust the common electric voltage of liquid crystal panel respectively, find the best common electric voltage of redness best common electric voltage, green best common electric voltage and blueness when corresponding to red, green and blue flicker test pictures flicker minimum value respectively;
Step 3, described liquid crystal panel show redness, green and blue pure color picture respectively, use described sensitive probe to obtain the brightness of redness, green and blue pure color picture respectively with flicker sensor;
The brightness that is red, green and blue pure color picture of step 4, foundation calculates redness, green and blue luminences weight factor respectively, and computing formula is:
Wherein, α
rfor red luma weight factor, α
gfor Green brightness weight factor, α
bfor blue luminences weight factor, r is the brightness value of red pure color picture, the brightness value that the brightness value that g is green solid picture, b are blue pure color picture;
Step 5, foundation redness, green and blue luminences weight factor and the best common electric voltage of red best common electric voltage, green best common electric voltage and blueness calculate liquid crystal panel the best common electric voltage, and computing formula is:
V
w＝α
r×V
r+α
g×V
g+α
b×V
b
Wherein, V
wfor the best common electric voltage of liquid crystal panel, V
rfor the best common electric voltage of redness, V
gfor the best common electric voltage of green, V
bfor the best common electric voltage of blueness;
Step 6, the best common electric voltage of liquid crystal panel step 5 calculated write gamma correction chip able to programme, regulate and terminate.
In described step 2, liquid crystal panel first shows red flicker test pictures, described sensitive probe is used to obtain the flicker value of red test pictures of glimmering with flicker sensor, and during the display of redness flicker test pictures, adjust the common electric voltage of liquid crystal panel, find corresponding to the best common electric voltage of redness during red test film flicker minimum value; Then liquid crystal panel display green flicker test pictures, described sensitive probe is used to obtain the flicker value of green test pictures of glimmering with flicker sensor, and during the display of green flicker test pictures, adjust the common electric voltage of liquid crystal panel, find corresponding to the best common electric voltage of green during green test pictures flicker minimum value; Last liquid crystal panel display blue flicker test pictures, described sensitive probe is used to obtain the flicker value of blue test pictures of glimmering with flicker sensor, and during the display of blueness flicker test pictures, adjust the common electric voltage of liquid crystal panel, find corresponding to the best common electric voltage of blueness during blue test pictures flicker minimum value.
In described step 3, liquid crystal panel first shows red pure color picture, uses described sensitive probe to obtain the brightness of red pure color picture with flicker sensor; Then liquid crystal panel display green solid picture, uses described sensitive probe to obtain the brightness of green solid picture with flicker sensor; Last liquid crystal panel shows blue pure color picture, uses described sensitive probe to obtain the brightness of blue pure color picture with flicker sensor.
In described step 2, liquid crystal panel shows redness, green and blue flicker test pictures respectively with same specific grey-scale.
In described step 3, liquid crystal panel shows redness, green and blue pure color picture respectively with described same specific grey-scale.
Described sensitive probe is photodiode.
Described step 1 also provides the time schedule controller be electrically connected with described liquid crystal panel and the measuring signal generator be electrically connected with described time schedule controller.
Described step 2 controls described liquid crystal panel by measuring signal generator and time schedule controller and shows redness, green and blue test pictures of glimmering respectively.
Described step 3 controls described liquid crystal panel by measuring signal generator and time schedule controller and shows redness, green and blue pure color picture respectively.
In described step 2, the best common electric voltage of red best common electric voltage, green best common electric voltage and blueness is different.
Beneficial effect of the present invention: the method for a kind of adjustable liquid crystal display panel common electric voltage provided by the invention, finds first respectively and corresponds to redness, green, with the best common electric voltage of redness of blueness flicker test pictures, green best common electric voltage, common electric voltage best with blueness, then introducing corresponds respectively to redness, green, with the redness of blue pure color picture, green, with blue luminences weight factor, by redness, green, with blue luminences weight factor in conjunction with red best common electric voltage, green best common electric voltage, calculate the best common electric voltage of liquid crystal panel with the best common electric voltage of blueness, redness can be corresponded respectively at liquid crystal panel, green, when inconsistent with the best common electric voltage of blue picture, by redness, green, redness is shared with blue luminences weight factor, green, and the deviation between the best common electric voltage of blueness, find the best common electric voltage of liquid crystal panel quickly and easily, reduce because sensitive probe is to the deviation of the best common electric voltage caused by the response sensitivity difference of different wave length light, ensure the display effect of liquid crystal panel and the shipment quality of liquid crystal panel.
In order to further understand feature of the present invention and technology contents, refer to following detailed description for the present invention and accompanying drawing, but accompanying drawing only provides reference and explanation use, is not used for being limited the present invention.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, by the specific embodiment of the present invention describe in detail, will make technical scheme of the present invention and other beneficial effect apparent.
In accompanying drawing,
Fig. 1 is the response curve schematic diagram of existing photodiode to the light of different wave length;
Fig. 2 is the process flow diagram of the method for adjustable liquid crystal display panel common electric voltage of the present invention;
Fig. 3 is the schematic diagram of the step 1 of the method for adjustable liquid crystal display panel common electric voltage of the present invention.
Embodiment
For further setting forth the technological means and effect thereof that the present invention takes, be described in detail below in conjunction with the preferred embodiments of the present invention and accompanying drawing thereof.
Refer to Fig. 2, the invention provides a kind of method of adjustable liquid crystal display panel common electric voltage, comprise the steps:
Step 1, as shown in Figure 3, the flicker sensor 140 liquid crystal panel 100, sensitive probe 110 being provided and being electrically connected with described sensitive probe 110.
Particularly, described sensitive probe 110 is photodiode, and its quantity can be one or more, for sensor light signal, and light signal is converted to electrical signal transfer to flicker sensor 140.When the quantity of described sensitive probe 110 is multiple, multiple sensitive probe 110 is located at the zones of different of described liquid crystal panel 100, arranges the accuracy that multiple sensitive probe 110 can promote the best common electric voltage of the redness recorded in subsequent step best common electric voltage, green best common electric voltage and blueness.
Further, described step 1 also provides the time schedule controller 120 be electrically connected with described liquid crystal panel 100 and the measuring signal generator 130 be electrically connected with described time schedule controller 120.
Step 2, described liquid crystal panel 100 show redness, green and blue flicker test pictures respectively, described sensitive probe 110 and flicker sensor 140 is used to obtain the flicker value of redness, green and blue test pictures of glimmering respectively, and during the display of red, green and blue flicker test pictures, adjust the common electric voltage of liquid crystal panel respectively, find the best common electric voltage of redness best common electric voltage, green best common electric voltage and blueness when corresponding to red, green and blue flicker test pictures flicker minimum value respectively.
Particularly, described step 2 controls described display panels 100 by measuring signal generator 130 and time schedule controller 120 and shows redness, green and blue test pictures of glimmering respectively.The DISPLAY ORDER of described redness, green and blue flicker test pictures is not limit, preferably, in described step 2, liquid crystal panel 100 first shows red flicker test pictures, described sensitive probe 110 is used to obtain the flicker value of red test pictures of glimmering with flicker sensor 140, and during the display of redness flicker test pictures, adjust the common electric voltage of liquid crystal panel, find corresponding to the best common electric voltage of redness during red test film flicker minimum value; Then liquid crystal panel 100 shows green flicker test pictures, described sensitive probe 110 is used to obtain the flicker value of green test pictures of glimmering with flicker sensor 140, and during the display of green flicker test pictures, adjust the common electric voltage of liquid crystal panel, find corresponding to the best common electric voltage of green during green test pictures flicker minimum value; Last liquid crystal panel 100 shows blue flicker test pictures, described sensitive probe 110 is used to obtain the flicker value of blue test pictures of glimmering with flicker sensor 140, and during the display of blueness flicker test pictures, adjust the common electric voltage of liquid crystal panel, find corresponding to the best common electric voltage of blueness during blue test pictures flicker minimum value.
Further, in this step 2, liquid crystal panel 100 shows redness, green and blue flicker test pictures, to ensure the consistance of test result respectively with same specific grey-scale.
In this step 2, the best common electric voltage of red best common electric voltage, green best common electric voltage and blueness is different.
Step 3, described liquid crystal panel 100 show redness, green and blue pure color picture respectively, use described sensitive probe 110 to obtain the brightness of redness, green and blue pure color picture respectively with flicker sensor 140.
Particularly, this step 3 controls described display panels 100 by measuring signal generator 130 and time schedule controller 120 and shows redness, green and blue pure color picture respectively.Same, the DISPLAY ORDER of described redness, green and blue pure color picture is not also limit, and preferably, liquid crystal panel 100 first shows red pure color picture, uses described sensitive probe 110 to obtain the brightness of red pure color picture with flicker sensor 140; Then liquid crystal panel 100 shows green solid picture, uses described sensitive probe 110 to obtain the brightness of green solid picture with flicker sensor 140; Last liquid crystal panel 100 shows blue pure color picture, uses described sensitive probe 110 to obtain the brightness of blue pure color picture with flicker sensor 140.
Further, in this step 3, liquid crystal panel 100 shows redness, green and blue pure color picture respectively with the specific grey-scale same with above-mentioned steps 2.
The brightness that is red, green and blue pure color picture of step 4, foundation calculates redness, green and blue luminences weight factor respectively, and computing formula is:
Wherein, α
rfor red luma weight factor, α
gfor Green brightness weight factor, α
bfor blue luminences weight factor, r is the brightness value of red pure color picture, the brightness value that the brightness value that g is green solid picture, b are blue pure color picture.Especially, above-mentioned redness, green and blue luminences weight factor are used in subsequent step, share the deviation between the best common electric voltage of redness, green and blueness, make the best common electric voltage of the final liquid crystal panel obtained more accurate.
Step 5, foundation redness, green and blue luminences weight factor and the best common electric voltage of red best common electric voltage, green best common electric voltage and blueness calculate liquid crystal panel the best common electric voltage, and computing formula is:
V
w＝α
r×V
r+α
g×V
g+α
b×V
b
Wherein, V
wfor the best common electric voltage of liquid crystal panel, V
rfor the best common electric voltage of redness, V
gfor the best common electric voltage of green, V
bfor the best common electric voltage of blueness.
Step 6, the best common electric voltage of liquid crystal panel step 5 calculated write gamma correction chip able to programme, regulate and terminate.
In sum, the method for adjustable liquid crystal display panel common electric voltage of the present invention, finds first respectively and corresponds to redness, green, with the best common electric voltage of redness of blueness flicker test pictures, green best common electric voltage, common electric voltage best with blueness, then introducing corresponds respectively to redness, green, with the redness of blue pure color picture, green, with blue luminences weight factor, by redness, green, with blue luminences weight factor in conjunction with red best common electric voltage, green best common electric voltage, calculate the best common electric voltage of liquid crystal panel with the best common electric voltage of blueness, redness can be corresponded respectively at liquid crystal panel, green, when inconsistent with the best common electric voltage of blue picture, by redness, green, redness is shared with blue luminences weight factor, green, and the deviation between the best common electric voltage of blueness, find the best common electric voltage of liquid crystal panel quickly and easily, reduce because sensitive probe is to the deviation of the best common electric voltage caused by the response sensitivity difference of different wave length light, ensure the display effect of liquid crystal panel and the shipment quality of liquid crystal panel.
The above, for the person of ordinary skill of the art, can make other various corresponding change and distortion according to technical scheme of the present invention and technical conceive, and all these change and be out of shape the protection domain that all should belong to the claims in the present invention.
Claims (10)
1. a method for adjustable liquid crystal display panel common electric voltage, is characterized in that, comprises the steps:
Step 1, the flicker sensor (140) liquid crystal panel (100), sensitive probe (110) being provided and being electrically connected with described sensitive probe (110);
Step 2, described liquid crystal panel (100) show redness, green and blue flicker test pictures respectively, described sensitive probe (110) and flicker sensor (140) is used to obtain the flicker value of redness, green and blue test pictures of glimmering respectively, and during the display of red, green and blue flicker test pictures, adjust the common electric voltage of liquid crystal panel respectively, find the best common electric voltage of redness best common electric voltage, green best common electric voltage and blueness when corresponding to red, green and blue flicker test pictures flicker minimum value respectively;
Step 3, described liquid crystal panel (100) show redness, green and blue pure color picture respectively, use described sensitive probe (110) to obtain the brightness of redness, green and blue pure color picture respectively with flicker sensor (140);
The brightness that is red, green and blue pure color picture of step 4, foundation calculates redness, green and blue luminences weight factor respectively, and computing formula is:
Wherein, α
rfor red luma weight factor, α
gfor Green brightness weight factor, α
bfor blue luminences weight factor, r is the brightness value of red pure color picture, the brightness value that the brightness value that g is green solid picture, b are blue pure color picture;
Step 5, foundation redness, green and blue luminences weight factor and the best common electric voltage of red best common electric voltage, green best common electric voltage and blueness calculate liquid crystal panel the best common electric voltage, and computing formula is:
V
w＝α
r×V
r+α
g×V
g+α
b×V
b
Wherein, V
wfor the best common electric voltage of liquid crystal panel, V
rfor the best common electric voltage of redness, V
gfor the best common electric voltage of green, V
bfor the best common electric voltage of blueness;
Step 6, the best common electric voltage of liquid crystal panel step 5 calculated write gamma correction chip able to programme, regulate and terminate.
2. the method for adjustable liquid crystal display panel common electric voltage as claimed in claim 1, it is characterized in that, in described step 2, liquid crystal panel (100) first shows red flicker test pictures, described sensitive probe (110) and flicker sensor (140) is used to obtain the flicker value of red test pictures of glimmering, and during the display of redness flicker test pictures, adjust the common electric voltage of liquid crystal panel, find corresponding to the best common electric voltage of redness during red test film flicker minimum value; Then liquid crystal panel (100) display green flicker test pictures, described sensitive probe (110) and flicker sensor (140) is used to obtain the flicker value of green test pictures of glimmering, and during the display of green flicker test pictures, adjust the common electric voltage of liquid crystal panel, find corresponding to the best common electric voltage of green during green test pictures flicker minimum value; Last liquid crystal panel (100) display blue flicker test pictures, described sensitive probe (110) and flicker sensor (140) is used to obtain the flicker value of blue test pictures of glimmering, and during the display of blueness flicker test pictures, adjust the common electric voltage of liquid crystal panel, find corresponding to the best common electric voltage of blueness during blue test pictures flicker minimum value.
3. the method for adjustable liquid crystal display panel common electric voltage as claimed in claim 1, it is characterized in that, in described step 3, liquid crystal panel (100) first shows red pure color picture, uses described sensitive probe (110) to obtain the brightness of red pure color picture with flicker sensor (140); Then liquid crystal panel (100) display green solid picture, uses described sensitive probe (110) to obtain the brightness of green solid picture with flicker sensor (140); Last liquid crystal panel (100) shows blue pure color picture, uses described sensitive probe (110) to obtain the brightness of blue pure color picture with flicker sensor (140).
4. the method for adjustable liquid crystal display panel common electric voltage as claimed in claim 1, is characterized in that, in described step 2, liquid crystal panel (100) shows redness, green and blue flicker test pictures respectively with same specific grey-scale.
5. the method for adjustable liquid crystal display panel common electric voltage as claimed in claim 4, it is characterized in that, in described step 3, liquid crystal panel (100) shows redness, green and blue pure color picture respectively with described same specific grey-scale.
6. the method for adjustable liquid crystal display panel common electric voltage as claimed in claim 1, it is characterized in that, described sensitive probe (110) is photodiode.
7. the method for adjustable liquid crystal display panel common electric voltage as claimed in claim 1, it is characterized in that, described step 1 also provides the time schedule controller (120) be electrically connected with described liquid crystal panel (100) and the measuring signal generator (130) be electrically connected with described time schedule controller (120).
8. the method for adjustable liquid crystal display panel common electric voltage as claimed in claim 7, it is characterized in that, described step 2 controls described liquid crystal panel (100) by measuring signal generator (130) and time schedule controller (120) and shows redness, green and blue test pictures of glimmering respectively.
9. the method for adjustable liquid crystal display panel common electric voltage as claimed in claim 7, it is characterized in that, described step 3 controls described liquid crystal panel (100) by measuring signal generator (130) and time schedule controller (120) and shows redness, green and blue pure color picture respectively.
10. the method for adjustable liquid crystal display panel common electric voltage as claimed in claim 1, is characterized in that, in described step 2, the best common electric voltage of red best common electric voltage, green best common electric voltage and blueness is different.
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