TWI694437B - Adjustment method of display apparatus with dual cells - Google Patents

Abstract

An adjustment method of a display apparatus with dual cells is provided. The display apparatus includes a first cell and a second cell. The adjustment method includes following steps. In a testing procedure, the method includes: adjusting a signal of the second cell to conform to an ideal gamma curve, thereby obtaining an ideal brightness correspondence table of the first cell and the second cell; and adjusting the signal of the first cell based on the ideal brightness correspondence table, thereby obtaining an ideal chromaticity correspondence table of the first cell. In the execution procedure, the method includes: setting a signal of the second cell based on the ideal brightness correspondence table when the first cell receives a signal; and adjusting the signal input to the first cell based on the ideal chromaticity correspondence table.

Description

Method for adjusting display device with double panel

The invention relates to an adjustment method of a display device, and in particular to an adjustment method of a display device with a double panel.

Conventional single liquid crystal panel displays will cause contrast reduction due to light leakage. Therefore, dual liquid crystal panel displays have been proposed to solve the light leakage problem, thereby improving contrast. When the gray scale resolution of the back panel of the dual LCD panel display is only 2 bits, although the dark state of the dual LCD panel can be displayed, it is necessary to reduce the front panel to maintain the overall optical smoothness. The number of gray levels is used, thus resulting in overlapping levels. On the other hand, if the gray scale resolution of the back panel of the dual LCD panel display is 8 bits, if proper adjustments are not made, the Gamma curve will deviate from Gamma 2.2, Stable Correlated Color Temperature (CCT).

The invention provides an adjustment method of a display device with a double panel, so that the gamma curve conforms to the specified ideal gamma curve and the CCT reaches a stable state.

The adjusting method of the display device with double panels of the present invention, wherein the display device includes a first panel and a second panel. The adjustment method includes the following steps. In the test phase, it includes: adjusting the signal of the second panel to conform to the ideal gamma curve, thereby obtaining an ideal brightness correspondence table between the first panel and the second panel; and adjusting the signal of the first panel based on the ideal brightness correspondence table, In this way, the ideal chromaticity correspondence table of the first panel is obtained. In the execution stage, it includes: when the first panel receives the signal, setting the signal of the second panel based on the ideal luminance correspondence table; and adjusting the signal input to the first panel based on the ideal chromaticity correspondence table.

In an embodiment of the invention, adjusting the signal of the second panel to conform to the ideal gamma curve, thereby obtaining the ideal brightness correspondence table between the first panel and the second panel includes: creating a gamma table of the second panel , Where the gamma table is used to record the proportion of brightness reduction corresponding to each grayscale reduction of the second panel when the first panel is set to the preset grayscale; when the second panel is fixed to the preset grayscale Next, set the first panel to one of the gray scales included in the gray scale range, and after setting the gray scale of the first panel, measure the brightness value. The brightness value is used to obtain the actual measurement curve; and the actual measurement curve is compared with the ideal gamma curve, thereby generating an ideal brightness correspondence table.

In an embodiment of the invention, the step of comparing the actual measurement curve with the ideal gamma curve to generate the ideal brightness correspondence table includes: taking one of the gray levels as the specified gray level and measuring from the actual measurement The curve takes out the brightness value corresponding to the specified gray scale and the ideal brightness value corresponding to the specified gray scale is taken from the ideal gamma curve; the brightness ratio is obtained based on the brightness value and the ideal brightness value; the brightness ratio corresponding to the brightness ratio is taken out from the gamma table The corresponding gray scale of the second panel corresponding to the brightness reduction ratio, recording the specified gray scale of the first panel and the corresponding gray scale of the second panel to the ideal brightness correspondence table; and repeatedly taking the other from the gray scale as the Specified gray scale, thereby recording the specified gray scale of the first panel and the corresponding gray scale of the second panel to the ideal brightness correspondence table until each gray scale in the gray scale range has been taken out as the specified gray scale.

In an embodiment of the invention, the step of creating the gamma table of the second panel includes: when the first panel is fixed to the brightest grayscale, from the brightest grayscale in the grayscale range to the darkest grayscale Let's set up the second panels one by one, and calculate the proportion of brightness reduction when the second panel is reduced by one gray level.

In an embodiment of the present invention, adjusting the signals of the first panel based on the ideal brightness correspondence table, thereby obtaining the ideal chromaticity correspondence table of the first panel includes: inputting one of the plurality of test signals one by one to the first panel One, where each test signal includes the first gray level, the second gray level, and the third gray level of the three primary colors; when the second panel is set to correspond to the gray level of the test signal based on the ideal brightness correspondence table, the test is adjusted The first gray level, the second gray level and the third gray level of the signal to obtain multiple adjusted signals; obtain the Δxy of each adjusted signal in the CIE color space to find one with the smallest difference from the target value The Δxy corresponding to the adjusted signal, where the target value is the Δxy in the CIE color space obtained when both the first panel and the second panel are set to the brightest gray scale; and the adjustment found is recorded The first gradation, the second gradation and the third gradation of the rear signal to the ideal chromaticity correspondence table of the first panel.

In an embodiment of the invention, the step of setting the second panel to correspond to the gray scale of the test signal based on the ideal brightness correspondence table includes: the first gray scale, the second gray scale and the third gray of the self-test signal The largest of the levels is taken as the reference gray level, and the gray level of the second panel corresponding to the reference gray level of the first panel is searched from the ideal brightness correspondence table.

In an embodiment of the invention, the steps of adjusting the first gray scale, the second gray scale, and the third gray scale of the test signal include: fixing one of the first gray scale, the second gray scale, and the third gray scale, and adjusting The other two of the first gray level, the second gray level and the third gray level.

； 其中，(R, G, B)為調整後訊號；(X, Y, Z)為其中一個目標灰階對應的三刺激值。(

,

,

)為第一面板設定為紅色、且第二面板基於理想亮度對應表而設定為對應的灰階時，所量測到在CIE色彩空間中的三刺激值；(

,

,

)為第一面板設定為綠色、且第二面板基於理想亮度對應表而設定為對應的灰階時，所量測到在CIE色彩空間中的三刺激值；(

,

,

)為第一面板設定為藍色、且第二面板基於理想亮度對應表而設定為對應的灰階時，所量測到在CIE色彩空間中的三刺激值；(

,

,

)為第一面板的灰階設定為0、且第二面板基於該理想亮度對應表而設定為對應的灰階時，所量測到在CIE色彩空間中的三刺激值。 In an embodiment of the present invention, adjusting the signal of the first panel based on the ideal brightness correspondence table, thereby obtaining the ideal chromaticity correspondence table of the first panel includes: obtaining an ideal color temperature table based on the ideal brightness correspondence table, ideal The color temperature table records multiple target gray levels and their corresponding three stimuli; based on the following formula, obtain the adjusted signal corresponding to each of these target gray levels; and record the first gray level and the second gray level of the adjusted signal And the third gray scale to the ideal chromaticity correspondence table of the first panel. The formula is:

; (R, G, B) is the adjusted signal; (X, Y, Z) is the tristimulus value corresponding to one of the target gray levels. (

,

,

) When the first panel is set to red and the second panel is set to the corresponding gray scale based on the ideal brightness correspondence table, the measured tristimulus value in the CIE color space; (

,

,

) When the first panel is set to green and the second panel is set to the corresponding gray scale based on the ideal brightness correspondence table, the measured tristimulus value in the CIE color space; (

,

,

) When the first panel is set to blue and the second panel is set to the corresponding gray scale based on the ideal brightness correspondence table, the measured tristimulus value in the CIE color space; (

,

,

) When the gray level of the first panel is set to 0, and the second panel is set to the corresponding gray level based on the ideal brightness correspondence table, the measured tristimulus value in the CIE color space.

Based on the above, by adjusting the signal of the second panel, the gamma curve conforms to the specified ideal gamma curve, and by adjusting the signal of the first panel, the CCT reaches a stable state.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below in conjunction with the accompanying drawings for detailed description as follows.

FIG. 1 is a flowchart of an adjustment method of a display device with a dual panel according to an embodiment of the invention. In this embodiment, the display device has a first panel and a second panel. The first panel is, for example, a front cell, and the second panel is, for example, a back cell. Referring to FIG. 1, the adjustment method includes a test phase S10 and an execution phase S11. The test stage S10 may be performed once before the display device is shipped, for example. The execution stage S11 is a step that will be performed every time the display is performed after the display device is shipped. The test stage S10 in the adjustment method can be performed by a controller provided in the display device, or by another electronic device, thereby obtaining an ideal brightness correspondence table and an ideal chromaticity correspondence table, and matching the ideal brightness The table and the ideal chromaticity correspondence table are set in the memory of the display device. After the display device is shipped from the factory, the controller in the display device can adjust the output of the first panel and the second panel through the ideal brightness correspondence table and the ideal chromaticity correspondence table built in the storage.

Here, the test phase S10 includes steps S101 and S103, and the execution phase S11 includes steps S111 and S113.

In step S101, the signal of the second panel is adjusted to conform to the ideal gamma curve, thereby obtaining an ideal brightness correspondence table between the first panel and the second panel. The ideal brightness correspondence table is used to record the gray level of the second panel when the gray level of the first panel is 0-255 respectively.

FIG. 2 is a flowchart of establishing an ideal brightness correspondence table according to an embodiment of the invention. Referring to FIG. 2, in step S205, a gamma table of the second panel is created. Here, the gamma table is used to record the proportion of brightness reduction corresponding to each gray scale down of the second panel when the first panel is set at a preset gray scale (for example, gray scale 255).

That is, when the gray scale of the first panel is fixed to 255, and the gray scale of the second panel is set to 255, the brightness is measured (it is assumed that it is in an undecayed state and the brightness is the brightest), and the brightness is used as Standard brightness, to judge how much the brightness is attenuated each time the gray level is reduced. For example, the brightness obtained when the first panel is set to 255 and the second panel is set to 254 is compared with the standard brightness, the brightness reduction ratio is determined, and then the brightness reduction ratio is filled in the field corresponding to 254. Then, the gray scales of the second panel are set to 253, 252,..., 1, 0, respectively, to measure to obtain the following Table 1.

Table 1 (Gamma table) Gray scale of the second panel Decrease in brightness (%) 0 1% 1 1.3% 2 2.1% 3 2.7% … … 255 100%

Next, in step S210, an actual measurement curve is obtained. Specifically, when the second panel is fixed at a preset gray scale (for example, 255), the first panel is set to one of a plurality of gray scales included in the gray scale range, and the first After the gray scale of the panel, the brightness value is measured, and the actual measurement curve is obtained by the multiple brightness values corresponding to the multiple gray scales, respectively. For example, in the case where the second panel is fixedly set to gray level 255, the first panel is set from gray levels 0 to 255, respectively, thereby obtaining a plurality of brightness values. That is, the brightness value is measured when the second panel is set to gray level 255 and the first panel is set to gray level 0; when the second panel is set to gray level 255 and the first panel is set to gray level 1; ...; measure the brightness value when the second panel is set to gray scale 255 and the first panel is set to gray scale 254; when the second panel is set to gray scale 255 and the first panel is set to gray scale 255 . After that, actual measurement curves are obtained from these brightness values.

Thereafter, in step S215, the actual measurement curve and the ideal gamma curve are compared, thereby generating an ideal brightness correspondence table. Specifically, one of the gray levels is taken one by one as the specified gray level, the brightness value corresponding to the specified gray level is taken from the actual measurement curve and the ideal brightness value corresponding to the specified gray level is taken from the ideal gamma curve. Next, a brightness ratio is obtained based on the obtained brightness value and the ideal brightness value. After that, the corresponding gray scale of the second panel corresponding to the brightness reduction ratio corresponding to the brightness ratio is taken from the gamma table, and the specified gray scale of the first panel and the corresponding gray scale of the second panel to the ideal brightness correspondence table (such as Table 2).

For example, FIG. 3 is a schematic diagram comparing the relationship between the actual measurement curve and the ideal gamma curve according to an embodiment of the invention. Please refer to FIG. 3, the horizontal axis of the graph 300 is the gray scale of the first panel, and the vertical axis is the brightness value. The solid line in the graph 300 represents the actual measurement curve 310, and the dotted line represents the ideal gamma curve 320. A'shows an enlarged view of area A.

Take one of the multiple gray levels (0 to 255) in the gray level range one by one as the specified gray level. Taking FIG. 3 as an example, assuming that the specified gray level is 13, the luminance value Y corresponding to the specified gray level 13 is taken from the actual measurement curve 310 and the ideal luminance value Y corresponding to the specified gray level 13 is taken from the ideal gamma curve 320. '. Next, the brightness ratio of the brightness value Y to the ideal brightness value Y'(=Y'/Y) is calculated. Assuming that the brightness ratio is 2.7%, find the corresponding gray scale (gray scale 3) of the second panel corresponding to the 2.7% brightness reduction ratio from the gamma table shown in Table 1. After that, in the ideal brightness correspondence table (as shown in Table 2), fill in 3 in the grey scale field of the second panel corresponding to the grey scale 13 (specified grey scale) of the first panel.

By analogy, one of the gray levels from 0 to 255 is taken one by one as the specified gray level, thereby recording the specified gray level of the first panel and the corresponding gray level of the second panel to the ideal brightness correspondence table, until the gray level range Each gray level of has been taken out as the specified gray level.

Table 2 (ideal brightness correspondence table) Grayscale of the first panel Gray scale of the second panel 0 0 1 1 2 7 3 13 … … 255 255

Returning to FIG. 1, after obtaining the ideal brightness correspondence table, in step S103, the signal of the first panel is adjusted based on the ideal brightness correspondence table, thereby obtaining the ideal chromaticity correspondence table of the first panel. Here, multiple test signals are input to the first panel one by one to adjust each test signal. The test signal includes the first gray level, the second gray level, and the third gray level of the three primary colors, namely, red, green, and blue. Here is another example to illustrate.

4 is a flowchart of establishing an ideal chromaticity correspondence table according to an embodiment of the invention. Referring to FIG. 4, in step S405, a test signal is input to the first panel. Next, in step S410, when the second panel is set to correspond to the gray level of the test signal based on the ideal brightness correspondence table, the first gray level, the second gray level, and the third gray level of the test signal are adjusted, To obtain multiple adjusted signals.

Specifically, the largest one of the first gray level, the second gray level, and the third gray level of the test signal is taken as the reference gray level. For example, assuming that the gray level of the test signal is (160, 150, 130), the first gray level 160 is taken as the reference gray level. Next, search for the gray level (for example, 130) of the second panel corresponding to the reference gray level 160 of the first panel from the ideal brightness correspondence table. In this way, the second panel is set to 130, and the first gray level, the second gray level, and the third gray level of the signal are tested based on the reference gray level 160 to obtain a plurality of adjusted signals. Here, one of the first gray scale, the second gray scale, and the third gray scale is fixed, and the other two of the first gray scale, the second gray scale, and the third gray scale are adjusted. For example, fix the second gray level (green) and adjust the first gray level (red) and the third gray level (blue).

Next, in step S415, the Δxy of each adjusted signal in the CIE color space is obtained to find the Δxy corresponding to one of the adjusted signals with the smallest difference from the target value. The target value is the color coordinates (x, y) in the CIE color space obtained when both the first panel and the second panel are set to the brightest gray scale.

First, make adjustments with a larger range. For example, within the range of ±40 steps of the reference gray level, each time the amount is increased or decreased by 20 to obtain multiple adjusted signals. For example, first adjust the first gray level to obtain multiple adjusted signals such as (140, 160, 160), (120, 160, 160), (180, 160, 160), (200, 160, 160), and then, Adjust the third gray level to obtain multiple adjusted signals (160, 160, 140), (160, 160, 120), (160, 160, 180), (160, 160, 200), etc. Adjust the first gray level and the third gray level to obtain multiple adjusted signals. After obtaining the adjusted signals obtained by the reference gray scale ±40 steps, the Δxy and target value of each adjusted signal in the CIE color space (the first panel and the second panel are both set to 255) Δxy in the CIE color space) to find the adjusted signal with the smallest difference (after coarse adjustment).

Assuming that the adjusted signal obtained in the adjusted signal obtained by the reference gray level ±40 steps is (160, 160, 180), then (160, 160, 180) is used as the reference signal, and the reference signal is ±10 steps Within the range of each, increase or decrease by 5 each time to obtain multiple adjusted signals. For example, get (155, 160, 180), (150, 160, 180), (165, 160, 180), (170, 160, 180), (160, 160, 175), (160, 160, 170) , (160, 160, 185), (160, 160, 190)..., (155, 160, 175), ..., (170, 160, 190) and other signals after adjustment. And, in the same manner as above, find the Δxy that has the smallest difference from the target value, thereby finding the adjusted signal with the smallest difference (the adjusted signal after the first fine adjustment).

After obtaining the adjusted signal after the first fine-tuning, the first fine-tuned signal is used as the reference signal, and within the range of ±3 steps of the reference signal, each time it is increased or decreased by 1 to obtain multiple adjusted signals. And, in the same way as above, find the Δxy with the smallest difference from the target value, thereby find the adjusted signal with the smallest difference (the adjusted signal after the second fine adjustment), and obtain the first corresponding to the adjusted signal A gray scale, a second gray scale and a third gray scale. The times of the coarse adjustment and the fine adjustment are only examples, and can be increased or decreased according to the situation.

In addition, in order to prevent gray scale inversion, corresponding conditions can be further added. For example, the values of the first gray level, second gray level, and third gray level (R, G, B) of the adjusted signal cannot be smaller than the values of (R, G, B) corresponding to the previous gray level value. For example, if the gray level 160 is adjusted to obtain (161, 160, 159), the gray level 161 is adjusted to obtain (160, 160, 150) is not allowed.

Then, in step S420, the first gray level, the second gray level, and the third gray level of the adjusted signal found in step S415 are recorded in the ideal chromaticity correspondence table of the first panel. The ideal chromaticity correspondence table is shown in Table 3.

Table 3 (ideal chromaticity correspondence table) Grayscale of the first panel R G B 0 0 0 0 1 1 1 2 2 2 2 2 3 4 3 3 … … … … 255 255 255 255

In addition, in other embodiments, the ideal brightness correspondence table can also be obtained in the following manner. For example, an ideal color temperature table is obtained based on an ideal brightness correspondence table, and the ideal color temperature table records multiple target gray levels and their respective tristimulus values. First, set the first panel and the second panel to the brightest gray level (ie, the first panel is set to 255, the second panel is set to 255), then, measure the color coordinates in the CIE color space, here It is called (x ₂₅₅ , y ₂₅₅ ). Next, the ideal brightness correspondence table is queried, and the target gray scale is queried in the gray scale of the first panel to obtain the gray scale corresponding to the second panel. After that, the corresponding tristimulus value is calculated according to the gray scale (Y) and color coordinates (x ₂₅₅ , y ₂₅₅ ) corresponding to the second panel.

Further, first, query the ideal brightness correspondence table (as shown in Table 2), query the gray scale of the corresponding second panel with the gray scale of the first panel at the target gray scale 0, obtain Y ₀ =0, and then based on Y ₀ , x ₂₅₅ , and y ₂₅₅ calculate the tristimulus values X ₀ , Y ₀ , and Z ₀ corresponding to the target gray level ₀ , and fill the tristimulus values in Table 4 below. Next, query the ideal brightness correspondence table, query the gray level of the second panel with the gray level of the first panel at the target gray level of 1, and obtain Y ₁ =1, and then calculate based on Y ₁ , x ₂₅₅ , y ₂₅₅ a gray scale corresponding to the target tristimulus values _{X 1, Y 1, Z 1} , and the tristimulus values into table 4 below. After that, query the ideal brightness correspondence table, query the gray level of the second panel corresponding to the gray level of the first panel at the target gray level of 2 to obtain Y ₂ =7, and then calculate based on Y ₂ , x ₂₅₅ , y ₂₅₅ 2 corresponding to the gray target tristimulus values _{X 2, Y 2, Z 2} , and the tristimulus values into table 4 below. By analogy, the tristimulus value corresponding to each target gray scale is obtained.

Table 4 (ideal color temperature table) Target gray scale of the first panel X Y Z 0 X ₀ Y ₀ Z ₀ 1 X ₁ Y ₁ Z ₁ 2 X ₂ Y ₂ Z ₂ 3 X ₃ Y ₃ Z ₃ … … … … 255 X ₂₅₅ Y ₂₅₅ Z ₂₅₅

Then, based on the following formula (1), the adjusted signal corresponding to each target gray scale is obtained. In addition, the first gray level, the second gray level and the third gray level of the adjusted signal are recorded to the ideal chromaticity correspondence table of the first panel.

Formula 1)

,

,

)為第一面板設定為紅色、且第二面板基於理想亮度對應表而設定為對應的灰階時，所量測到在CIE色彩空間中的三刺激值。(

,

,

)為該第一面板設定為綠色、且第二面板基於理想亮度對應表而設定為對應的灰階時，所量測到在CIE色彩空間中的三刺激值。(

,

,

)為第一面板設定為藍色、且第二面板基於理想亮度對應表而設定為對應的灰階時，所量測到在CIE色彩空間中的三刺激值。(

,

,

)為第一面板的灰階設定為0、且第二面板基於理想亮度對應表而設定為對應的灰階時（在此第一面板與第二面板皆設定為0），所量測到在CIE色彩空間中的三刺激值。 Among them, (R, G, B) is the adjusted signal, R, G, B represent the first gray level, second gray level and third gray level; (X, Y, Z) is the corresponding three of the target gray level Stimulus value (refer to Table 4). (

,

,

) When the first panel is set to red and the second panel is set to the corresponding gray scale based on the ideal brightness correspondence table, the measured tristimulus value in the CIE color space. (

,

,

) When the first panel is set to green and the second panel is set to the corresponding gray scale based on the ideal brightness correspondence table, the measured tristimulus value in the CIE color space. (

,

,

) When the first panel is set to blue and the second panel is set to the corresponding gray scale based on the ideal brightness correspondence table, the measured tristimulus value in the CIE color space. (

,

,

) When the gray scale of the first panel is set to 0, and the second panel is set to the corresponding gray scale based on the ideal brightness correspondence table (both the first panel and the second panel are set to 0 here), the measured Tristimulus values in the CIE color space.

After the ideal brightness correspondence table and the ideal chromaticity correspondence table are obtained, the ideal brightness correspondence table and the ideal chromaticity correspondence table can be set in the memory of the display device. After the display device is shipped from the factory, the controller of the display device will check the table for each display to adjust the output of the first panel and the second panel.

Returning to FIG. 1, in step S111, when the first panel receives the signal, the controller of the display device sets the signal of the second panel based on the ideal brightness correspondence table. Furthermore, in step S113, the controller adjusts the signal input to the first panel based on the ideal chromaticity correspondence table.

For example, assuming that the first panel receives gray level 3, the controller will adjust the gray level of the second panel to 13 based on the ideal brightness correspondence table, so that the brightness display is optimal. In addition, the controller will also adjust (R, G, B) of the first panel to (4, 3, 3) based on the ideal chromaticity correspondence table, so that the CCT is in a stable state.

In summary, in the above embodiment, by adjusting the signal of the second panel, the gamma curve conforms to the specified ideal gamma curve, and by adjusting the signal of the first panel, the CCT reaches a stable state.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

300: graph

310: actual measurement curve

320: ideal gamma curve

A: area

A’: Enlarged view of area A

Y: brightness value

Y’: ideal brightness

S10, S11, S101, S103, S111, S113: each step of the adjustment method of the display device with a double panel

S205～S215: Steps of establishing ideal brightness correspondence table

S405～S420: Steps of establishing ideal chromaticity correspondence table

FIG. 1 is a flowchart of an adjustment method of a display device with a dual panel according to an embodiment of the invention. FIG. 2 is a flowchart of establishing an ideal brightness correspondence table according to an embodiment of the invention. FIG. 3 is a schematic diagram comparing the relationship between an actual measurement curve and the ideal gamma curve according to an embodiment of the invention. 4 is a flowchart of establishing an ideal chromaticity correspondence table according to an embodiment of the invention.

S10, S11, S101, S103, S111, S113: each step of the adjustment method of the display device with a double panel

Claims (8)

An adjustment method of a display device with a dual panel, wherein the display device includes a first panel and a second panel, the adjustment method includes: in a test stage, including: adjusting the signal of the second panel to meet an ideal Gamma curve, thereby obtaining an ideal brightness correspondence table of the first panel and the second panel; and adjusting the signal of the first panel based on the ideal brightness correspondence table, thereby obtaining an ideal color of the first panel Degree correspondence table; in an execution stage, including: when the first panel receives a signal, based on the ideal brightness correspondence table to set the signal of the second panel; and based on the ideal chromaticity correspondence table to adjust the input to the The signal of the first panel. The adjustment method as described in item 1 of the patent application scope, wherein the step of adjusting the signal of the second panel to conform to the ideal gamma curve, thereby obtaining an ideal brightness correspondence table between the first panel and the second panel includes : Create a gamma table of the second panel, wherein the gamma table is used to record the brightness corresponding to each gray level lowered by the second panel when the first panel is set at a preset gray level Decrease ratio; when the second panel is fixed to the preset gray scale, set the first panel to one of the gray scales included in a gray scale range, and set the first panel After the gray scale of the, measure a brightness value, corresponding to these gray scales respectively Multiple brightness values to obtain an actual measurement curve; and compare the actual measurement curve with the ideal gamma curve to generate the ideal brightness correspondence table. The adjustment method as described in item 2 of the patent application scope, wherein the step of comparing the actual measurement curve with the ideal gamma curve to generate the ideal brightness correspondence table includes: taking one of the gray levels as A specified gray level, extracting the brightness value corresponding to the specified gray level from the actual measurement curve and extracting the brightness ideal value corresponding to the specified gray level from the ideal gamma curve; based on the brightness value and the brightness ideal value Obtain a brightness ratio; extract a corresponding gray scale of the second panel corresponding to the brightness reduction ratio corresponding to the brightness ratio from the gamma table, and record the specified gray scale of the first panel and the second panel The corresponding gray scale to the ideal brightness correspondence table; and repeatedly taking another one of the gray scales as the specified gray scale, thereby recording the correspondence between the specified gray scale of the first panel and the second panel From the gray scale to the ideal brightness correspondence table, every gray scale in the gray scale range has been taken out as the specified gray scale. The adjustment method as described in item 2 of the patent application scope, wherein the step of establishing the gamma table of the second panel includes: when the first panel is fixed to the brightest gray scale, the Set the second panel one by one from the lightest gray scale to the darkest gray scale, and calculate the proportion of brightness reduction corresponding to the second panel downgrading by one gray scale. The adjustment method as described in item 1 of the patent application range, wherein the step of adjusting the signal of the first panel based on the ideal brightness correspondence table, thereby obtaining the ideal chromaticity correspondence table of the first panel includes: The first panel inputs one of a plurality of test signals, each of which includes a first gray level, a second gray level, and a third gray level of the three primary colors; based on the ideal brightness correspondence table, the If the second panel is set to correspond to the gray level of the test signal, adjust the first gray level, the second gray level, and the third gray level of the test signal to obtain multiple adjusted signals; △xy of the adjusted signals in the CIE color space to find the Δxy corresponding to the one of the adjusted signals with the smallest difference from a target value, wherein the target values are the first panel and the second The panel is set to the Δxy in the CIE color space obtained when the lightest gray scale is obtained; and the first gray scale, the second gray scale, and the third gray scale of one of the adjusted signals are recorded To the ideal chromaticity correspondence table of the first panel. The adjustment method as described in item 5 of the patent application, wherein the step of setting the second panel to correspond to the gray scale of the test signal based on the ideal brightness correspondence table includes: the first gray scale from the test signal , The largest of the second gray scale and the third gray scale is taken as a reference gray scale, and the gray scale of the second panel corresponding to the reference gray scale of the first panel is searched from the ideal brightness correspondence table. The adjustment method as described in item 5 of the patent application scope, wherein the steps of adjusting the first gray scale, the second gray scale and the third gray scale of the test signal include: fixing the first gray scale and the second gray scale One of the gray scale and the third gray scale adjusts the other two of the first gray scale, the second gray scale, and the third gray scale. The adjustment method as described in item 1 of the patent application range, wherein the step of adjusting the signal of the first panel based on the ideal brightness correspondence table, thereby obtaining the ideal chromaticity correspondence table of the first panel includes: based on the ideal A brightness correspondence table to obtain an ideal color temperature table, which records multiple target gray levels and their respective tristimulus values; based on the following formula, obtain an adjusted signal corresponding to each of these target gray levels; and Record a first gray level, a second gray level and a third gray level of the adjusted signal into the ideal chromaticity correspondence table of the first panel; the formula is:

Where (R, G, B) is the adjusted signal, R represents the first gray level, G represents the second gray level, and B represents the third gray level; (X, Y, Z) are the targets One of the three stimulus values corresponding to gray scale; ( X _R , Y _R , Z _R ) is the first panel is set to red, and the second panel is set to the corresponding gray scale based on the ideal brightness correspondence table, the The tristimulus values in the CIE color space are measured; ( X _G , Y _G , Z _G ) is set to green for the first panel, and the second panel is set to the corresponding gray scale based on the ideal brightness correspondence table , The measured tristimulus value in the CIE color space; ( X _B , Y _B , Z _B ) is set to blue for the first panel, and the second panel is set to be based on the ideal brightness correspondence table For the corresponding gray scale, the measured tristimulus value in the CIE color space; ( X _{L 0} , Y _{L 0} , Z _{L 0} ) is the gray scale of the first panel is set to 0, and the second panel When the corresponding gray scale is set based on the ideal brightness correspondence table, the measured tristimulus value in the CIE color space is measured.

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