CN104409068A - Brightness compensation method and curve surface display device - Google Patents

Abstract

The embodiment of the invention provides a brightness compensation method and a curve surface display device. The method is used in the technical field of displaying and can overcome the light leak phenomenon of the curve surface display device and improve the brightness uniformity of the curve surface display device. The brightness compensation method comprises the following steps: obtaining the brightness value of a non light leak region of the curve surface display device as a reference value; adjusting PWM (Pulse Width Modulation) of a reference backlight LED light bar according to the reference value and a reference brightness value. The brightness compensation method provided by the embodiment of the invention is used for solving the light leak problem of the curve surface display device.

Description

A brightness compensation method and a curved surface display device

technical field

The invention relates to the field of display technology, in particular to a brightness compensation method and a curved display device.

Background technique

At present, the commonly used displays are mainly flat-panel displays, and the retina of the human eye is curved. The distance between the edge area of the direction and the human eye is not equal, which will distort the picture seen by the user and affect the viewing experience of the user.

In order to meet the user's viewing needs, a curved display has appeared in the prior art. The curvature of the display screen of the curved display is approximately the same as that of the retina of the human eye. , the distance from the center area of the curved display to the human eye in the horizontal direction is approximately equal to the distance from the edge area of the curved display to the human eye, so that the picture is intuitively mapped to the brain at the same angle, and the edge area of the curved display in the horizontal direction can realize Better viewing angles and a better sense of presence.

When making a curved display, it is necessary to bend the display screen and the backlight module to the same curvature and bond them together, but usually, since the materials of the display screen and the backlight module of the curved display are not exactly the same, the display screen and the backlight module It is difficult for the curvature of the group to be completely consistent, and light leakage will occur in areas with inconsistent curvature, which will affect the brightness uniformity of the curved display.

Contents of the invention

Embodiments of the present invention provide a brightness compensation method and a curved display device, which can overcome the light leakage phenomenon of the curved display device and improve the brightness uniformity of the curved display device.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

On the one hand, an embodiment of the present invention provides a brightness compensation method for a curved display device, and the brightness compensation method includes:

Obtaining the brightness value of the non-light leakage area of the curved display device as a reference value. According to the reference value and the reference brightness value, adjust the PWM (Pulse Width Modulation, pulse width debugging) of the reference backlight LED (Light Emitting Diode, light emitting diode) light bar.

Wherein, the reference backlight LED light bar is any one of the backlight LED light bars corresponding to the light leakage area of the curved display device, and the reference brightness value is the brightness value of the part corresponding to the reference backlight LED light bar in the light leakage area .

Optionally, before acquiring the luminance value of the non-light leakage area of the curved display device as a reference value, the method includes:

determining a non-leakage area and a light-leakage area of the curved display device;

Corresponding backlight LED light strips are provided for the non-light leakage area and the light leakage area, and the density of the backlight LED light strips corresponding to the light leakage area is greater than the density of the backlight LED light strips corresponding to the non-light leakage area.

Optionally, the adjusting the PWM of the reference backlight LED light bar according to the reference value and the reference brightness value includes:

Adjust the PWM of the reference backlight LED light bar according to the absolute value of the difference between the reference value and the reference brightness value.

Optionally, the adjusting the PWM of the reference backlight LED light bar according to the absolute value of the difference between the reference value and the reference brightness value includes:

Acquiring the PWM corresponding to the difference between the reference value and the reference brightness value as PWM1;

Obtain the PWM of the reference backlight LED strip mentioned before adjustment as PWM2;

Obtain PWM3 by formula (1), said formula (1) is: PWM3=PWM2-PWM1;

The PWM3 is used as the adjusted PWM of the reference backlight LED light bar.

Optionally, the non-leakage area corresponds to a plurality of backlight LED light bars;

The acquisition of the brightness value of the non-light leakage area of the curved display device as a reference value includes:

Acquiring the brightness value of each backlight LED light bar corresponding to the non-light leakage area in the plurality of backlight LED light bars;

Calculating the average value of the luminance values of each of the backlight LED strips corresponding to the non-leakage area;

The average value was used as the reference value.

On the other hand, an embodiment of the present invention provides a curved display device, and the curved display device includes:

an acquisition unit, configured to acquire the brightness value of the non-light leakage area of the curved display device as a reference value;

An adjustment unit, configured to adjust the PWM of the reference backlight LED strip according to the reference value and the reference brightness value;

Wherein, the reference backlight LED light bar is any one of the backlight LED light bars corresponding to the light leakage area of the curved display device, and the reference brightness value is the brightness value of the part corresponding to the reference backlight LED light bar in the light leakage area .

Optionally, the curved display device further includes:

a determining unit, configured to determine the non-leakage area and the light-leakage area of the curved display device;

A setting unit, configured to set corresponding backlight LED light bars for the non-light-leakage area and the light-leakage area, the density of the backlight LED light bar corresponding to the light-leakage area is greater than the density of the backlight LED light bar corresponding to the non-light-leakage area .

Optionally, the adjustment unit is specifically used for:

Adjust the PWM of the reference backlight LED light bar according to the absolute value of the difference between the reference value and the reference brightness value.

Optionally, the adjustment unit is specifically used for:

Acquiring the PWM corresponding to the difference between the reference value and the reference brightness value as PWM1;

Obtain the PWM of the reference backlight LED strip mentioned before adjustment as PWM2;

Obtain PWM3 by formula (1), said formula (1) is: PWM3=PWM2-PWM1;

The PWM3 is used as the adjusted PWM of the reference backlight LED light bar.

Optionally, the non-leakage area corresponds to a plurality of backlight LED light bars;

The acquisition unit is specifically used for:

Acquiring the brightness value of each backlight LED light bar corresponding to the non-light leakage area in the plurality of backlight LED light bars;

Calculating the average value of the luminance values of each of the backlight LED strips corresponding to the non-leakage area;

The average value was used as the reference value.

An embodiment of the present invention provides a brightness compensation method and a curved display device. The brightness compensation method includes: first obtaining the brightness value of the non-light leakage area of the curved display device as a reference value, and then according to the reference value and the reference brightness value , to adjust the PWM of the reference backlight LED strip. Wherein, the reference backlight LED light bar is any one of the backlight LED light bars corresponding to the light leakage area of the curved display device, and the reference brightness value is the brightness value of the part corresponding to the reference backlight LED light bar in the light leakage area . Compared with the prior art, when the brightness of the light leakage area and the non-light leakage area of the curved display device are inconsistent, the PWM of each backlight LED strip corresponding to the light leakage area can be adjusted according to the brightness value of the non-light leakage area, so that each backlight LED The brightness corresponding to the light bar tends to be consistent with the brightness of the non-light leakage area, thereby making the brightness of the light leakage area and the non-light leakage area tend to be consistent, which overcomes the light leakage phenomenon of the curved display device and improves the brightness uniformity of the curved display device.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic flowchart of a brightness compensation method provided by an embodiment of the present invention;

FIG. 2 is a schematic flowchart of another brightness compensation method provided by an embodiment of the present invention;

Fig. 3 is a schematic diagram of setting up a backlight LED light bar provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a curved display device provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another curved display device provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

An embodiment of the present invention provides a brightness compensation method, as shown in FIG. 1 , which is used for a curved display device. The brightness compensation method includes:

Step 101. Obtain the luminance value of the non-light leakage area of the curved display device as a reference value.

In practical applications, since the curvatures of the display screen and the backlight module cannot be completely consistent in curved displays, light leakage will occur in areas where the curvatures are inconsistent. Usually, after the curved display device is fabricated, the light leakage area and the non-light leakage area of the curved display device are fixed and can be determined through experiments or simulations. In practical applications, the luminance value of the non-leakage area of the curved display device may be obtained through a luminance sensor, or may be obtained through other luminance acquisition devices, which is not limited in this embodiment of the present invention.

Step 102: Adjust the PWM (Pulse Width Modulation, pulse width adjustment) of the reference backlight LED light bar according to the reference value and the reference brightness value.

Wherein, the reference backlight LED light bar is any one of the backlight LED light bars corresponding to the light leakage area of the curved display device, and the reference brightness value is the brightness value of the part corresponding to the reference backlight LED light bar in the light leakage area .

In practical applications, the light leakage region of a curved display device may usually include multiple photoleakage subregions, and different photoleakage subregions are distributed in different positions of the display device. For example, different photoleakage subregions may be distributed along the edge of the curved display device. Each light leakage sub-area may correspond to at least one backlight LED light bar. In this way, the light leakage area may correspond to a plurality of backlight LED light bars. In the embodiment of the present invention, any one of the backlight LED light bars corresponding to the light leakage area of the curved surface display device The backlight LED light bar is described as an example of a reference backlight LED light bar, and the brightness of the curved surface display device facing the reference backlight LED light bar is a reference brightness value.

Usually, the PWM of the reference backlight LED strip can be adjusted according to the absolute value of the difference between the reference value and the reference brightness value, or the ratio of the reference value to the reference brightness value. The PWM of the reference backlight LED light bar is the duty cycle of the driving signal of the reference backlight LED light bar. When the PWM of the reference backlight LED light bar is large, it means that the driving signal of the reference backlight LED light bar has more pulse high levels. , the brightness of the reference backlight LED light bar is higher, when the PWM of the reference backlight LED light bar is smaller, it means that the pulse high level in the driving signal of the reference backlight LED light bar is less, and the brightness of the reference backlight LED light bar is darker, so The brightness of the reference backlight LED light bar can be adjusted by adjusting the PWM of the reference backlight LED light bar, and then the brightness of the part of the light leakage area corresponding to the reference backlight LED light bar can be adjusted.

For example, if the PWM of the reference backlight LED strip is adjusted according to the ratio of the reference value to the reference brightness value, if the ratio of the reference value to the reference brightness value is large, it means that the reference brightness value is low, and the reference backlight can be increased. PWM of the LED light bar; if the ratio of the reference value to the reference brightness value is small, it means that the reference brightness value is large, and the PWM of the reference backlight LED light bar can be reduced.

In this way, when the brightness of the light leakage area and the non-light leakage area of the curved display device are inconsistent, the PWM of each backlight LED light bar corresponding to the light leakage area can be adjusted according to the brightness value of the non-light leakage area, so that each backlight LED light bar corresponds to The brightness of the light leakage area tends to be consistent with the brightness of the non-light leakage area, and then the brightness of the light leakage area and the non-light leakage area tends to be consistent, which overcomes the light leakage phenomenon of the curved surface display device and improves the brightness uniformity of the curved surface display device.

Further, before acquiring the brightness value of the non-leakage area of the curved display device as a reference value, the method includes: determining the non-light-leakage area and the light-leakage area of the curved display device; The light leakage area is provided with a corresponding backlight LED light bar, and the density of the backlight LED light bar corresponding to the light leakage area is greater than the density of the backlight LED light bar corresponding to the non-light leakage area.

For example, the non-leakage area and the light leakage area of the curved display device can be determined through experiments, that is, a full white image is input to the curved display device, and then the brightness value of each area of the curved display device is detected by a brightness sensor, and then according to the collected different The brightness value of the area determines whether the corresponding area leaks light. For example, after inputting a full-white image to the curved display device, if there is no light leakage area, the brightness of each area of the curved display device should be 255. During the experiment, the brightness values of 9 areas of the curved display device were collected, which are respectively A area, Area B, Area C, Area D, Area E, Area F, Area G, Area H, and Area I, where the brightness values of Area E, Area G, and Area I are greater than 255 gray scales, then it can be determined that Area E, Area G and The I area is the light leakage area.

After determining the light leakage area and the non-light leakage area, backlight LED light strips can be set for the backlight areas of the light leakage area and the non-light leakage area respectively. Preferably, denser backlight LED light strips can be set for the light leakage area. The adjustment of each backlight LED light bar corresponding to the light leakage area can adjust the brightness of the light leakage area more accurately and flexibly, so that the brightness of the light leakage area and the non-light leakage area tend to be consistent.

In practical application, according to the brightness value of the light leakage area in the experiment, a corresponding backlight LED strip can be set for the light leakage area. For example, the brightness values of area E, area G, and area I are 267, 270, and 275 respectively. Three corresponding backlight LED strips can be set for E area, and four corresponding backlight LED light bars can be set for G area. There are 5 corresponding backlight LED light bars in the I area, so that the brightness value of the I area can be consistent with the brightness value of the non-leakage area by adjusting the PWM of the 5 backlight LED light bars; By adjusting the PWM of the 4 backlight LED strips, the brightness value of the G area tends to be consistent with that of the non-leakage area; by adjusting the PWM of the 3 backlight LED strips, the brightness value of the E area is consistent with that of the non-leakage area. The brightness values of the non-light-leaking areas tend to be consistent.

Optionally, the adjusting the PWM of the reference backlight LED light bar according to the reference value and the reference brightness value includes: adjusting the PWM of the reference backlight LED light bar according to the absolute value of the difference between the reference value and the reference brightness value. PWM.

For example, when the absolute value of the difference between the reference value and the reference brightness value is large, it means that the brightness difference between the light leakage area and the non-light leakage area is large, and it is necessary to greatly reduce the PWM of the reference backlight LED light bar, so that the reference backlight LED light bar The dimming range is relatively large, thereby greatly reducing the brightness of the light leakage area; when the absolute value of the difference between the reference value and the reference brightness value is small, it means that the brightness difference between the light leakage area and the non-light leakage area is small, and the reference backlight LED light can be slightly reduced. The PWM of the strip makes the dimming of the reference backlight LED strip smaller, thereby reducing the brightness of the light leakage area slightly.

Optionally, when adjusting the PWM of the reference backlight LED light bar according to the absolute value of the difference between the reference value and the reference brightness value, the PWM corresponding to the absolute value of the difference between the reference value and the reference brightness value may be obtained first as PWM1, then obtain the PWM of the reference backlight LED light bar before adjustment as PWM2, obtain PWM3 by formula (1), and the formula (1) is: PWM3=PWM2-PWM1; use the PWM3 as the reference after adjustment PWM for the backlight LED strip.

For example, assuming that the absolute value of the difference between the reference value and the reference brightness value is 35, the absolute value of the difference between the reference value and the reference brightness value corresponding to 35 can be obtained through the brightness value and the PWM value LUT (Look Up Table, lookup table). The PWM is used as PWM1, and the brightness value and PWM value LUT is a look-up table for querying the PWM corresponding to the brightness value by using the brightness value as a query address. After obtaining PWM1, you can use the same method to obtain the PWM of the reference backlight LED strip mentioned before the adjustment, that is, use the reference brightness value as the query address, query the PWM corresponding to the reference brightness value through the brightness value and PWM value LUT, and refer to The PWM corresponding to the brightness value is used as PWM2, and then PWM3 is obtained according to the formula PWM3=PWM2-PWM1 as the adjusted PWM of the reference backlight LED strip.

In practical applications, the PWM corresponding to the absolute value of the difference between the reference value and the reference brightness value can also be obtained as PWM1 through the ratio of the brightness value to the PWM. Specifically, during initialization, the proportional relationship between the brightness value and PWM can be established. For example, the brightness value and PWM can be said to be directly proportional. The larger the brightness value, the larger the corresponding PWM. When halved, the PWM duty cycle is halved. In practical applications, the relationship between the brightness value and the PWM can also be adjusted according to actual measurement results, which is not limited in the embodiment of the present invention.

In practical applications, before adjusting the PWM of the reference backlight LED light bar according to the absolute value of the difference between the reference value and the reference brightness value, it may first be determined whether the absolute value of the difference between the reference value and the reference brightness value is greater than or It is equal to a preset value, which is set according to specific conditions in practical applications. For example, the preset value can be the minimum brightness difference that can be distinguished by the human eye obtained from experiments. When the reference value and the reference When the absolute value of the brightness difference is greater than or equal to the minimum brightness difference that can be distinguished by the human eye, it means that the difference between the reference brightness value and the brightness value of the non-light leakage area is large, and the human eye can already distinguish it. The absolute value of the difference between the reference value and the reference brightness value adjusts the PWM of the reference backlight LED strip. When the absolute value of the difference between the reference value and the reference brightness value is less than the minimum brightness difference that can be distinguished by the human eye, the reference brightness The difference between the brightness value and the brightness value of the non-leakage area is small, and the human eye cannot distinguish it. At this time, it is not necessary to adjust the PWM of the reference backlight LED strip.

Preferably, the non-light-leakage area corresponds to a plurality of backlight LED light bars; the acquisition of the brightness value of the non-light-leakage area of the curved display device as a reference value includes: acquiring the brightness value of each backlight in the plurality of backlight LED light bars. The brightness value of the LED light bar corresponding to the part of the non-light leakage area; calculating the average value of the brightness value of each backlight LED light bar corresponding to the part of the non-light leakage area; using the average value as the reference value.

In practical applications, the area of the non-leakage area of the curved surface display device is relatively large, and multiple backlight LED light bars can be set in the backlight area. Partly set the brightness sensor to obtain the brightness value of the part corresponding to each backlight LED light bar, and then calculate the average value of the brightness values of the parts corresponding to the obtained multiple backlight LED light bars, and the average brightness value is the non-leakage area part Brightness value, and then use this brightness value as a reference value.

The brightness compensation method provided by the embodiment of the present invention is used in a curved display device. First, obtain the brightness value of the non-leakage area of the curved display device as a reference value, and then adjust the reference backlight LED light according to the reference value and the reference brightness value. bar PWM. Wherein, the reference backlight LED light bar is any one of the backlight LED light bars corresponding to the light leakage area of the curved display device, and the reference brightness value is the brightness value of the part corresponding to the reference backlight LED light bar in the light leakage area . Compared with the prior art, when the brightness of the light leakage area and the non-light leakage area of the curved display device are inconsistent, the PWM of each backlight LED strip corresponding to the light leakage area can be adjusted according to the brightness value of the non-light leakage area, so that each backlight LED The brightness corresponding to the light bar tends to be consistent with the brightness of the non-light leakage area, thereby making the brightness of the light leakage area and the non-light leakage area tend to be consistent, which overcomes the light leakage phenomenon of the curved display device and improves the brightness uniformity of the curved display device.

An embodiment of the present invention provides a brightness compensation method for a curved display device. As shown in FIG. 2, the brightness compensation method includes:

Step 201 , determine the light leakage area and the non-light leakage area of the curved display device, and execute step 202 .

For example, an all-white image is input to the curved display device, and then brightness sensors are set for different areas of the curved display device to detect the brightness values of different areas of the curved display device. Assuming that the brightness values of nine different areas of the curved display device are detected, Area A, area B, area C, area D, area E, area F, area G, area H and area I, where the brightness value of area A is 265, the value of area C is 277, and the brightness of area H If the value is 273, both of which are greater than 255 gray levels, it can be determined that the A region, the C region and the H region form the light leakage region.

Step 202 , respectively setting corresponding backlight LED strips for the light leakage area and the non-light leakage area of the curved display device, and performing step 203 .

For example, denser backlight LED light strips may be provided for the light leakage area, so that the density of the backlight LED light strips corresponding to the light leakage area is greater than the density of the backlight LED light strips corresponding to the non-light leakage area. In this way, by adjusting each backlight LED light bar corresponding to the light leakage area, the brightness of the light leakage area can be adjusted more precisely and flexibly, so that the brightness of the light leakage area and the non-light leakage area tend to be consistent.

As shown in FIG. 3, area A, area C and area H are shown in area 301, area 302, and area 303 in FIG. is the non-leakage area. The corresponding backlight LED strips can be set according to the brightness values of the A region 301, the C region 302 and the H region 303, for example, the A region 301, the C region 302 and the H region 303 settings The number of backlight LED light strips in the A area 301, the C area 302 and the H area 303 are descending in descending order of brightness values, and three backlight LED light bars 304 are set for the A area 301, and three backlight LED light bars 304 are set for the C area 302. Set 5 backlight LED light bars 304, set 4 backlight LED light bars 304 for the H area 303; then set 3 backlight LED light bars 304 for the non-leakage area of the display device 30.

Step 203 , acquire the brightness value of the non-light leakage area as a reference value, and execute step 204 .

For example, as shown in FIG. 3 , three brightness sensors are provided for the part facing the three backlight LED light bars 304 on the curved surface display device 30, and then the three backlight LED light bars on the curved surface display device 30 are detected by the brightness sensors. For the luminance value of the part facing 304, calculate the average value of the 3 luminance values corresponding to the 3 backlight LED strips 304, the average value is the luminance value of the non-leakage area, and then use the luminance value as a reference value. Assuming that the brightness values of the parts facing the three backlight LED strips 304 on the curved display device 30 detected by the three brightness sensors are 250, 252, and 248 respectively, and the average value of the three brightness values is 250, the reference value is 250.

Step 204: Obtain the reference luminance value of the part of the light leakage area corresponding to the reference backlight LED strip, and execute step 205.

Specifically, the reference backlight LED light bar is any one of the backlight LED light bars corresponding to the light leakage area of the curved display device, as shown in FIG. 3 , the embodiment of the present invention assumes that the reference backlight LED light bar 3041 is the H area 303 corresponds to a backlight LED strip. For example, a luminance sensor is set on the part of the curved display device facing the reference backlight LED light bar 3041, and the luminance value of the part of the curved display device facing the reference backlight LED light bar 3041 is detected by the luminance sensor, assuming that the luminance sensor detects If the luminance value of the part of the curved surface display device facing the reference backlight LED light bar 3041 is 280, then the reference luminance value is 280.

Step 205 , acquire the absolute value of the difference between the reference value and the reference brightness value, and execute step 206 .

In the embodiment of the present invention, the reference value is 250 and the reference brightness value is 280, so the absolute value of the difference between the reference value and the reference brightness value is 30.

Step 206, determine whether the absolute value of the difference between the reference value and the reference brightness value is greater than or equal to the preset value; when the absolute value of the difference between the reference value and the reference brightness value is greater than or equal to the preset value, perform step 207; when the reference value When the absolute value of the difference from the reference brightness value is smaller than the preset value, step 210 is executed.

As an example, the preset value is set according to specific situations in actual applications, and the minimum brightness difference that can be distinguished by human eyes in experiments can be set as the preset value, which is not limited in this embodiment of the present invention. Assuming that the preset value is 10, since the absolute value of the difference between the reference value and the reference brightness value is 30, which is greater than the preset value, it means that the brightness difference between the part of the curved display device facing the reference backlight LED strip and the brightness of the non-leakage area Larger, requires an adjustment to the PWM of the reference backlight LED strip.

Step 207 , acquire the PWM corresponding to the absolute value of the difference between the reference value and the reference brightness value as PWM1 , and execute step 208 .

For example, the PWM corresponding to the absolute value of the difference between the reference value and the reference brightness value can be obtained through the conversion formula of the brightness value and PWM, or the absolute value of the difference between the reference value and the reference brightness value can be obtained through the brightness value and the PWM value LUT PWM. In the present invention, the luminance value and the PWM value LUT are taken as an example for illustration. Since the absolute value of the difference between the reference value and the reference brightness value is 30, then use 30 as the query address of the brightness value and the PWM value LUT, and then query the value of the query address, which is the difference between the reference value and the reference brightness value The PWM corresponding to the absolute value of 30, and then use this PWM as PWM1.

Step 208, acquire the PWM corresponding to the reference brightness value as PWM2, and execute step 209.

Similarly, since the reference brightness value is 280, you can set 280 as the query address of the brightness value and PWM value LUT, and then query the value of the query address, which is the PWM corresponding to the reference brightness value, and then use this PWM as PWM2 .

Step 209, according to the formula PWM3=PWM2-PWM1, obtain PWM3 as the adjusted PWM of the reference backlight LED strip.

After obtaining PWM1 and PWM2, calculate the difference between PWM2 and PWM1, which is PWM3, and then use PWM3 as the adjusted PWM of the reference backlight LED strip, where PWM3 is smaller than PWM2. Furthermore, the reference backlight LED light bar may be driven according to the adjusted PWM of the reference backlight LED light bar, so that the brightness of the reference backlight LED light bar is dimmed, thereby reducing the brightness of the part of the H area 303 facing the reference backlight LED light bar.

According to the same method, adjust the PWM of other backlight LED strips corresponding to the light leakage area, and the brightness value of different parts of the light leakage area will be reduced by different degrees according to the adjustment of the PWM of the corresponding backlight LED light strip, so that the brightness value of the entire light leakage area is the same as The brightness values of the non-light-leaking areas tend to be consistent.

Step 210, do not adjust the PWM of the reference backlight LED light bar.

When the absolute value of the difference between the reference value and the reference brightness value is smaller than the preset value, it means that the difference between the brightness of the part of the curved display device facing the reference backlight LED light bar and the brightness of the non-leakage area is small, and it may not be easy for the human eye to distinguish out, so there is no need to adjust the PWM of the reference backlight LED strip.

It should be noted that the order of the steps of the brightness compensation method provided by the embodiment of the present invention can be adjusted appropriately, and the steps can also be increased or decreased according to the situation. Any person familiar with the technical field within the technical scope disclosed in the present invention, Changes that can be easily thought of should be covered within the protection scope of the present invention, and thus will not be repeated here.

The brightness compensation method provided by the embodiment of the present invention is used in a curved display device. Compared with the prior art, when the brightness of the light leakage area and the non-light leakage area of the curved display device are inconsistent, the light leakage area can be adjusted according to the brightness value of the non-light leakage area. The corresponding PWM of each backlight LED light bar makes the corresponding brightness of each backlight LED light bar tend to be consistent with the brightness of the non-leakage area, thereby making the brightness of the light leakage area and the non-leakage area tend to be consistent, overcoming the problem of curved surface display The light leakage phenomenon of the device improves the brightness uniformity of the curved surface display device.

An embodiment of the present invention provides a curved display device 40. As shown in FIG. 4, the curved display device 40 includes:

The obtaining unit 401 is configured to obtain the brightness value of the non-light leakage area of the curved display device 40 as a reference value.

The adjustment unit 402 is configured to adjust the PWM of the reference backlight LED light bar according to the reference value and the reference brightness value; wherein, the reference backlight LED light bar is a backlight LED light bar corresponding to the light leakage area of the curved display device 40 In any one of the above, the reference brightness value is the brightness value of the part corresponding to the reference backlight LED light bar in the light leakage area.

In this way, when the brightness of the light leakage area and the non-light leakage area of the curved display device 40 are inconsistent, the PWM of each backlight LED light bar corresponding to the light leakage area can be adjusted according to the brightness value of the non-light leakage area, so that each backlight LED light bar The corresponding luminance tends to be consistent with the luminance of the non-light-leakage area, thereby making the luminance of the light-leakage area and the non-light-leakage area tend to be consistent, which overcomes the light leakage phenomenon of the curved display device 40 and improves the brightness uniformity of the curved display device 40 .

Further, as shown in FIG. 5 , the curved display device 40 further includes:

The determination unit 403 is configured to determine the non-light leakage area and the light leakage area of the curved display device 40 .

A setting unit 404, configured to set corresponding backlight LED light bars for the non-light-leakage area and the light-leakage area, the density of the backlight LED light bar corresponding to the light-leakage area is greater than that of the backlight LED light bar corresponding to the non-light-leakage area density.

Optionally, the adjustment unit 402 is specifically configured to: adjust the PWM of the reference backlight LED light bar according to the absolute value of the difference between the reference value and the reference brightness value.

Optionally, the adjustment unit 402 is specifically configured to: obtain the PWM corresponding to the difference between the reference value and the reference brightness value as PWM1; obtain the PWM of the reference backlight LED strip before adjustment as PWM2; use the formula ( 1) Acquiring PWM3, the formula (1) is: PWM3=PWM2-PWM1; the PWM3 is used as the adjusted PWM of the reference backlight LED strip.

Optionally, the non-light leakage area corresponds to a plurality of backlight LED light bars.

The acquisition unit 401 is specifically configured to: acquire the luminance value of each backlight LED light bar corresponding to the non-light leakage area in the plurality of backlight LED light bars; The average value of the luminance values of the area part; the average value is used as the reference value.

In the curved display device provided by the embodiment of the present invention, when the brightness of the light leakage area and the non-light leakage area of the curved display device are inconsistent, the PWM of each backlight LED light bar corresponding to the light leakage area can be adjusted according to the brightness value of the non-light leakage area, so that each The brightness corresponding to each backlight LED light bar tends to be consistent with the brightness of the non-light leakage area, thereby making the brightness of the light leakage area and the non-light leakage area tend to be consistent, which overcomes the light leakage phenomenon of the curved surface display device and improves the brightness uniformity of the curved surface display device sex.

Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working process of the above-described devices and units can refer to the corresponding process in the foregoing method embodiments, and details are not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, or in the form of hardware plus software functional units.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (10)

1. a luminance compensation method, is characterized in that, for curved-surface display device, described luminance compensation method comprises:

Obtain the brightness value in the non-light leak region of described curved-surface display device as reference value;

According to described reference value and reference brightness value, adjustment is with reference to the pulse width debugging PWM of backlight leds LED lamp bar;

Wherein, described is any one in backlight LED light bars corresponding to the light leak region of described curved-surface display device with reference to backlight LED light bars, and described reference brightness value is the brightness value of the corresponding part with reference to backlight LED light bars in described light leak region.

2. method according to claim 1, is characterized in that, the brightness value in the non-light leak region of described acquisition described curved-surface display device as reference value before, described method comprises:

Determine non-light leak region and the light leak region of described curved-surface display device;

For described non-light leak region and described light leak region arrange corresponding backlight LED light bars, the density of the backlight LED light bars that described light leak region is corresponding is greater than the density of backlight LED light bars corresponding to described non-light leak region.

3. method according to claim 1 and 2, is characterized in that, described according to described reference value and reference brightness value, and adjustment comprises with reference to the PWM of backlight LED light bars:

According to the absolute value of the difference of described reference value and described reference brightness value, adjustment is with reference to the PWM of backlight LED light bars.

4. method according to claim 3, is characterized in that, the absolute value of the described difference according to described reference value and described reference brightness value, and adjustment comprises with reference to the PWM of backlight LED light bars:

Obtain the PWM of the difference correspondence of described reference value and described reference brightness value as PWM1;

Before obtaining adjustment, the described PWM with reference to backlight LED light bars is as PWM2;

Obtain PWM3 by formula (1), described formula (1) is: PWM3=PWM2-PWM1;

Using described PWM3 described PWM with reference to backlight LED light bars after adjustment.

5. method according to claim 1 and 2, is characterized in that, the corresponding multiple backlight LED light bars in described non-light leak region;

The brightness value in the non-light leak region of described acquisition described curved-surface display device comprises as reference value:

Obtain the brightness value of the corresponding described non-light leak area part of each backlight LED light bars in described multiple backlight LED light bars;

Calculate the mean value of the brightness value of the corresponding described non-light leak area part of described each backlight LED light bars;

Using described mean value as described reference value.

6. a curved-surface display device, is characterized in that, described curved-surface display device comprises:

Acquiring unit, for obtaining the brightness value in the non-light leak region of described curved-surface display device as reference value;

Adjustment unit, for according to described reference value and reference brightness value, adjusts the pulse width debugging PWM with reference to backlight LED light bars;

Wherein, described is any one in backlight LED light bars corresponding to the light leak region of described curved-surface display device with reference to backlight LED light bars, and described reference brightness value is the brightness value of the corresponding part with reference to backlight LED light bars in described light leak region.

7. curved-surface display device according to claim 6, is characterized in that, described curved-surface display device also comprises:

Determining unit, for determining non-light leak region and the light leak region of described curved-surface display device;

Setting unit, for arranging corresponding backlight LED light bars for described non-light leak region and described light leak region, the density of the backlight LED light bars that described light leak region is corresponding is greater than the density of backlight LED light bars corresponding to described non-light leak region.

8. the curved-surface display device according to claim 6 or 7, is characterized in that, described adjustment unit specifically for:

According to the absolute value of the difference of described reference value and described reference brightness value, adjustment is with reference to the PWM of backlight LED light bars.

9. curved-surface display device according to claim 8, is characterized in that, described adjustment unit specifically for:

Obtain the PWM of the difference correspondence of described reference value and described reference brightness value as PWM1;

Before obtaining adjustment, the described PWM with reference to backlight LED light bars is as PWM2;

Obtain PWM3 by formula (1), described formula (1) is: PWM3=PWM2-PWM1;

Using described PWM3 described PWM with reference to backlight LED light bars after adjustment.

10. the curved-surface display device according to claim 6 or 7, is characterized in that, the corresponding multiple backlight LED light bars in described non-light leak region;

Described acquiring unit specifically for:

Obtain the brightness value of the corresponding described non-light leak area part of each backlight LED light bars in described multiple backlight LED light bars;

Calculate the mean value of the brightness value of the corresponding described non-light leak area part of described each backlight LED light bars;

Using described mean value as described reference value.