TWI842029B - Image compensation module and method for compensating image - Google Patents

Abstract

An image compensation module and methods for compensating image are provided. The image compensation module includes a plurality of storage devices and a controller. The plurality of storage devices store a plurality of sets of image compensation values for a display panel. The plurality of sets of image compensation values correspond to a plurality of light source modules with different bending types respectively. The controller is used to perform image compensation to the image showed by the display panel according to one of the plurality of image compensation values.

Description

Image compensation module and image compensation method

The present invention relates to an image compensation module and an image compensation method, and in particular to an image compensation module and an image compensation method for a display panel.

With the rapid development of technology, the importance of display panels in modern life is increasing. In order to cope with various usage scenarios, display panels can have many different forms, such as curved display panels or flat display panels. In order to avoid the uneven brightness (mura) problem of the display panel affecting the user's viewing experience, the display panel is usually matched with a light source module to display an image, and then the display panel is subjected to image compensation operation and the obtained image compensation value is stored in a storage device in the image compensation module to eliminate the uneven brightness of the display panel according to the image compensation value. However, when the light source module matched with the display panel is replaced, for example, when it is replaced with a light source module with a different curvature, the image compensation effect obtained according to the original image compensation value may be insufficient.

Therefore, there is a need to propose an improved image compensation module and image compensation method, which enables the display panel to maintain a good image compensation effect when used with light source modules of different curvature forms.

According to an embodiment of the present invention, an image compensation module for a display panel is provided. The image compensation module includes a plurality of storage devices and a controller. The plurality of storage devices store a plurality of sets of image compensation values for the display panel. The plurality of sets of image compensation values correspond to a plurality of light source modules with different bending forms. The controller is used to perform image compensation on the image displayed by the display panel according to one of the plurality of sets of image compensation values.

According to another embodiment of the present invention, an image compensation method for a display panel is provided. The image compensation method includes: providing a display panel including a plurality of pixels; performing a first image compensation operation on the display panel; and performing a second image compensation operation on the display panel. The first image compensation operation includes: using a planar light source module to allow light provided by the planar light source module to pass through a plurality of pixels of the display panel; obtaining a plurality of first brightness data of the plurality of pixels; comparing and calculating the plurality of first brightness data with a plurality of first theoretical brightness data to establish a first set of image compensation values; and storing the first set of image compensation values in a first storage device on the display panel. The second image compensation operation includes: using a curved light source module to allow light provided by the curved light source module to pass through multiple pixels of the display panel; obtaining multiple second brightness data of the multiple pixels; comparing and calculating the multiple second brightness data with multiple second theoretical brightness data to establish a second set of image compensation values; storing the second set of image compensation values in a second storage device on the display panel.

According to another embodiment of the present invention, an image compensation method is provided. The image compensation method is used for a display device. The display device includes a display panel, a light source module, a controller, and a plurality of storage devices for storing a plurality of sets of image compensation values. The image compensation method includes: according to the bending form of the light source module, controlling the controller to read a set of image compensation values corresponding to the bending form of the light source module from the plurality of sets of image compensation values; and performing image compensation on the image displayed by the display panel according to the set of image compensation values.

In order to better understand the above and other aspects of the present invention, the following is a specific example and a detailed description with the attached drawings as follows:

100,200: Image compensation module

101,201:Controller

102,202: First storage device

103,203: Second storage device

150: Display panel

204: Third storage device

205: Fourth storage device

S301~S303,S401~S405,S501~S506: Steps

FIG. 1 shows an image compensation module according to an embodiment of the present invention; FIG. 2 shows an image compensation module according to an embodiment of the present invention; FIG. 3 shows an image compensation method according to an embodiment of the present invention; FIG. 4 shows an image compensation method according to an embodiment of the present invention; and FIG. 5 shows an image compensation method according to an embodiment of the present invention.

Please refer to FIG. 1. FIG. 1 shows an image compensation module 100 according to an embodiment of the present invention. The image compensation module 100 can be used for a display panel 150. The display panel 150 can include a plurality of pixels. The display panel 150 can be a flat display panel or a curved display panel. The display panel 150 can be, for example, a display panel of various types of display devices, such as an organic light emitting diode display (OLED), a liquid crystal display (LCD), a plasma display, etc. The image compensation module 100 can be configured on a non-display area of the display panel 150. The image compensation module 100 includes a controller 101 and a plurality of storage devices. The storage device may be, for example, a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a flash memory, or the like. A plurality of storage devices may store a plurality of sets of image compensation values for the display panel 150. Each storage device may be used to store one or more sets of image compensation values. Each of the plurality of sets of image compensation values corresponds to a light source module having a different curvature form. For example, one of the plurality of sets of image compensation values may correspond to a planar light source module, and two of the plurality of sets of image compensation values may correspond to curved light source modules with different degrees of curvature. The controller 101 may perform image compensation on the image displayed by the display panel 150 according to one of the plurality of sets of image compensation values. The controller 101 may be, for example, a timing controller (T-CON).

For example, the plurality of storage devices may include a first storage device 102 storing a first set of image compensation values and a second storage device 103 storing a second set of image compensation values. The first set of image compensation values may correspond to a planar light source module. The first set of image compensation values may be used in a scenario where the display panel 150 is used in conjunction with the planar light source module. The first set of image compensation values may include a plurality of first image compensation values, and the plurality of first image compensation values may correspond to a plurality of pixels in the display panel 150, respectively. The second set of image compensation values may correspond to a curved light source module. The second set of image compensation values may be used in a scenario where the display panel 150 is used in conjunction with the curved light source module. The second set of image compensation values may include multiple second image compensation values, and the multiple second image compensation values may correspond to multiple pixels in the display panel 150 respectively. The controller 101 may read multiple first image compensation values stored in the first storage device 102 or multiple second image compensation values stored in the second storage device 103, and set the individual brightness of multiple pixels of the display panel 150 according to the read image compensation values to optimize the image displayed by the display panel 150.

In another embodiment, the image compensation module of the present invention may include more than two storage devices, as shown in FIG. 2. FIG. 2 shows an image compensation module 200 according to another embodiment of the present invention. The image compensation module 200 may include a controller 201, a first storage device 202 for storing a first set of image compensation values, a second storage device 203 for storing a second set of image compensation values, a third storage device 204 for storing a third set of image compensation values, and a fourth storage device 205 for storing a fourth set of image compensation values. The first set of image compensation values, the second set of image compensation values, the third set of image compensation values, and the fourth set of image compensation values correspond to light source modules with different bending forms, respectively.

In this embodiment, the first set of image compensation values may correspond to a planar light source module. The first set of image compensation values may be used in a scenario where the display panel 150 is used in conjunction with a planar light source module. The first set of image compensation values may include a plurality of first image compensation values, and the plurality of first image compensation values may correspond to a plurality of pixels in the display panel 150, respectively. The second set of image compensation values may correspond to a regular curved light source module. The second set of image compensation values may be used in a scenario where the display panel 150 is used in conjunction with a regular curved light source module. The second set of image compensation values may include a plurality of second image compensation values, and the plurality of second image compensation values may correspond to a plurality of pixels in the display panel 150, respectively. The third set of image compensation values may correspond to a reverse curved light source module. The third set of image compensation values can be used in the case where the display panel 150 is equipped with an inverse curved light source module. The third set of image compensation values can include multiple third image compensation values, and the multiple third image compensation values can correspond to multiple pixels in the display panel 150 respectively. The fourth set of image compensation values can correspond to a multi-segment curved light source module. The fourth set of image compensation values can be used in the case where the display panel 150 is equipped with a multi-segment curved light source module. The fourth set of image compensation values can include multiple fourth image compensation values, and the multiple fourth image compensation values can correspond to multiple pixels in the display panel 150 respectively. The positive curved surface type light source module and the reverse curved surface type light source module may respectively represent that when the light emitting surface of the light source module faces the display panel 150, the two ends of the curved surface of the light source module are closer to or farther from the display panel 150 than the center of the curved surface. The multi-segment curved surface type light source module may be, for example, a light source module including a plurality of bending degrees (curvatures), or may be a light source module including a positive curved surface and a reverse curved surface. The controller 201 can read multiple first image compensation values stored in the first storage device 202, multiple second image compensation values stored in the second storage device 203, multiple third image compensation values stored in the third storage device 204, or multiple fourth image compensation values stored in the fourth storage device 205, and set the individual brightness of multiple pixels of the display panel 150 according to the read image compensation values to optimize the image displayed by the display panel 150.

In other embodiments, the image compensation module may include some storage devices in the first storage device 202, the second storage device 203, the third storage device 204, and the fourth storage device 205. In other embodiments, the image compensation module may include more storage devices.

Please refer to Figure 3. Figure 3 shows an image compensation method for a display panel according to an embodiment of the present invention. The image compensation method may include the following steps. Provide a display panel including a plurality of pixels (step S301). Perform a first image compensation operation on the display panel (step S302). Perform a second image compensation operation on the display panel (step S303). Step S303 may be performed before or after step S302, and the present invention is not limited thereto.

In step S302, the first image compensation operation may include the following multiple sub-steps. A planar light source module is used in combination with a display panel so that the light provided by the planar light source module passes through multiple pixels of the display panel, so that the display panel displays an image. For example, the display panel can display a grayscale image. Multiple first brightness data of multiple pixels are obtained. For example, a charge-coupled device (CCD) can be used to capture the image displayed by the display panel to obtain the first brightness data of each pixel. The multiple first brightness data and the multiple first theoretical brightness data are compared and calculated to establish a first set of image compensation values. The first theoretical brightness data may be, for example, the ideal brightness of a pixel in the display panel when a planar light source module is used. The first set of image compensation values may include multiple first image compensation values corresponding to multiple pixels in the display panel, respectively. The first set of image compensation values is stored in a first storage device in the image compensation module. The image compensation device may be configured on a display panel, for example. The first image compensation operation may also include, after storing the first set of image compensation values, removing the planar light source module.

In step S303, the second image compensation operation may include the following multiple sub-steps. Use a curved light source module in combination with a display panel so that the light provided by the curved light source module passes through multiple pixels of the display panel, so that the display panel displays an image. For example, the display panel can display a grayscale image. Obtain multiple second brightness data for multiple pixels. For example, a photosensitive coupling element can be used to capture an image displayed by the display panel to obtain second brightness data for each pixel. Compare and calculate the multiple second brightness data with the multiple second theoretical brightness data to establish a second set of image compensation values. The second theoretical brightness data may, for example, be the ideal brightness of a pixel in the display panel when the curved light source module is used. The second set of image compensation values may include multiple second image compensation values corresponding to multiple pixels in the display panel, respectively. The second set of image compensation values is stored in a second storage device in the image compensation module. The second storage device is different from the first storage device. The second image compensation operation may also include, after storing the second set of image compensation values, removing the curved light source module.

In one embodiment, after performing the image compensation method described in FIG. 3 on a display panel, a plurality of sets of image compensation values corresponding to light source modules of different bending forms are stored in the first storage device and the second storage device of the image compensation module, thereby obtaining the first storage device 102 and the second storage device 103 as shown in FIG. 1.

Please refer to FIG. 4. FIG. 4 shows an image compensation method for a display panel according to another embodiment of the present invention. The difference between the image compensation method shown in FIG. 4 and the image compensation method shown in FIG. 3 is that the image compensation method shown in FIG. 4 includes image compensation values when using more different light source modules.

The image compensation method may include the following steps. Provide a display panel including a plurality of pixels (step S401). Perform a first image compensation operation on the display panel (step S402). Perform a second image compensation operation on the display panel (step S403). Perform a third image compensation operation on the display panel (step S404). Perform a fourth image compensation operation on the display panel (step S405). The order of step S402, step S403, step S404 and step S405 may be adjusted according to actual needs, and the present invention is not limited thereto.

In step S402, the first image compensation operation may include the following multiple sub-steps. Use a planar light source module in combination with a display panel so that the light provided by the planar light source module passes through multiple pixels of the display panel, so that the display panel displays an image. For example, the display panel can display a grayscale image. Obtain multiple first brightness data for multiple pixels. For example, a photosensitive coupling element can be used to capture an image displayed by the display panel to obtain the first brightness data for each pixel. Compare and calculate the multiple first brightness data with the multiple first theoretical brightness data to establish a first set of image compensation values. The first theoretical brightness data may, for example, be the ideal brightness of a pixel in the display panel when a planar light source module is used. The first set of image compensation values may include multiple first image compensation values corresponding to multiple pixels in the display panel, respectively. The first set of image compensation values is stored in a first storage device in the image compensation module. The image compensation device may be configured on a display panel, for example. The first image compensation operation may also include, after storing the first set of image compensation values, removing the planar light source module.

In step S403, the second image compensation operation may include the following multiple sub-steps. Use a positive curved surface light source module with a display panel so that the light provided by the positive curved surface light source module passes through multiple pixels of the display panel, so that the display panel displays an image. For example, the display panel can display a grayscale image. Obtain multiple second brightness data of multiple pixels. For example, a photosensitive coupling element can be used to capture an image displayed by the display panel to obtain the second brightness data of each pixel. Compare and calculate the multiple second brightness data with the multiple second theoretical brightness data to establish a second set of image compensation values. The second theoretical brightness data may be, for example, the ideal brightness of a pixel in the display panel when the positive curved surface light source module is used. The second set of image compensation values may include multiple second image compensation values corresponding to multiple pixels in the display panel, respectively. The second set of image compensation values is stored in a second storage device in the image compensation module. The second image compensation operation may also include removing the regular curved surface light source module after storing the second set of image compensation values.

In step S404, the third image compensation operation may include the following multiple sub-steps. Use an inverse curved light source module in combination with a display panel so that the light provided by the inverse curved light source module passes through multiple pixels of the display panel, causing the display panel to display an image. For example, the display panel can display a grayscale image. Obtain multiple third brightness data for multiple pixels. For example, a photosensitive coupling element may be used to capture an image displayed by the display panel to obtain third brightness data for each pixel. Compare and calculate the multiple third brightness data with the multiple third theoretical brightness data to establish a third set of image compensation values. The third theoretical brightness data may, for example, be the ideal brightness of a pixel in the display panel when the inverse curved light source module is used. The third set of image compensation values may include multiple third image compensation values corresponding to multiple pixels in the display panel, respectively. The third set of image compensation values is stored in a third storage device in the image compensation module. The third image compensation operation may also include removing the anti-curved light source module after storing the third set of image compensation values.

In step S405, the fourth image compensation operation may include the following multiple sub-steps. Use a multi-segment curved light source module in combination with a display panel so that the light provided by the multi-segment curved light source module passes through multiple pixels of the display panel, so that the display panel displays an image. For example, the display panel can display a grayscale image. Obtain multiple fourth brightness data for multiple pixels. For example, a photosensitive coupling element can be used to capture an image displayed by the display panel to obtain fourth brightness data for each pixel. Compare and calculate the multiple fourth brightness data with the multiple fourth theoretical brightness data to establish a fourth set of image compensation values. The fourth theoretical brightness data may, for example, be the ideal brightness of a pixel in the display panel when a multi-segment curved light source module is used. The fourth set of image compensation values may include multiple fourth image compensation values corresponding to multiple pixels in the display panel, respectively. The fourth set of image compensation values is stored in a fourth storage device in the image compensation module. The fourth image compensation operation may also include, after storing the fourth set of image compensation values, removing the multi-segment curved light source module.

The first storage device, the second storage device, the third storage device and the fourth storage device in step S402, step S403, step S404 and step S405 may be different from each other. In one embodiment, after the image compensation method described in reference to FIG. 4 is performed on a display panel, a plurality of sets of image compensation values corresponding to light source modules of different bending forms are stored in the first storage device, the second storage device, the third storage device and the fourth storage device of the image compensation module, and the first storage device 202, the second storage device 203, the third storage device 204 and the fourth storage device 205 as shown in FIG. 2 are obtained. In other embodiments, the image compensation method may include steps S402, S403, S404, and part of step S405. In other embodiments, the image compensation method may include more image compensation operations to correspond to more types of light source modules.

Please refer to FIG. 5. FIG. 5 shows an image compensation method according to another embodiment of the present invention. The image compensation method can be used in a display device. The display device can include a display panel, a light source module, and an image compensation module. The image compensation module can include a controller and a plurality of storage devices for storing a plurality of sets of image compensation values. Each of the plurality of sets of image compensation values corresponds to a light source module having a different curvature form. For example, a display panel can be matched with a plurality of light source modules with different curvature forms and the image compensation method described in reference to Figures 3-4 can be performed, so that a plurality of sets of image compensation values corresponding to light source modules with different curvature forms are stored in a plurality of storage devices of the image compensation module; then the display panel, the image compensation module, and any of the aforementioned light source modules with different curvature forms are matched to form a display device.

The image compensation method may include the following multiple steps. Provide a display device to a user (step S501). The user may control the controller of the image compensation module according to the bending form of the light source module in the display device to read a set of image compensation values corresponding to the bending form of the light source module in the display device from a plurality of sets of image compensation values (steps S502-S505). The controller of the image compensation module may perform image compensation on the image displayed by the display panel according to the set of image compensation values (step S506). Image compensation may include setting the individual brightness of multiple pixels of the display panel in the display device according to the set of image compensation values to optimize the image displayed by the display panel.

For example, the plurality of storage devices of the image compensation module may include a first storage device for storing a first set of image compensation values, a second storage device for storing a second set of image compensation values, a third storage device for storing a third set of image compensation values, and a fourth storage device for storing a fourth set of image compensation values. The first set of image compensation values may correspond to a planar light source module. The second set of image compensation values may correspond to a positive curved light source module. The third set of image compensation values may correspond to a reverse curved light source module. The fourth set of image compensation values may correspond to a multi-segment curved light source module. In one embodiment, the display device includes a planar light source module, and the user can control the controller of the image compensation module to read the first set of image compensation values corresponding to the planar light source module from the first set of image compensation values to the fourth set of image compensation values (step S502). The controller can perform image compensation on the image displayed by the display panel according to the first set of image compensation values (step S506). In another embodiment, the display device includes a regular curved surface light source module, and the user can control the controller of the image compensation module to read a second set of image compensation values corresponding to the regular curved surface light source module from the first set of image compensation values to the fourth set of image compensation values (step S503). The controller can perform image compensation on the image displayed by the display panel according to the second set of image compensation values (step S506). In another embodiment, the display device includes a reverse curved light source module, and the user can control the controller of the image compensation module to read a third set of image compensation values corresponding to the reverse curved light source module from the first set of image compensation values to the fourth set of image compensation values (step S504). The controller can perform image compensation on the image displayed by the display panel according to the third set of image compensation values (step S506). In another embodiment, the display device includes a multi-segment curved light source module, and the user can control the controller of the image compensation module to read the fourth set of image compensation values corresponding to the multi-segment curved light source module from the first set of image compensation values to the fourth set of image compensation values (step S505), and the controller can perform image compensation on the image displayed by the display panel according to the fourth set of image compensation values (step S506).

According to multiple embodiments of the present invention, the image compensation module and image compensation method provided by the present invention can be applied to various light source modules with different bending forms, which can avoid the problem of insufficient image compensation effect and poor display image quality caused by replacing the light source module.

In summary, although the present invention has been disclosed as above by the embodiments, it is not intended to limit the present invention. Those with common knowledge in the technical field to which the present invention belongs can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope defined in the attached patent application.

100: Image compensation module

101: Controller

102: First storage device

103: Second storage device

150: Display panel

Claims (8)

An image compensation module for a display panel comprises: a plurality of storage devices for storing a plurality of sets of image compensation values for a display panel, wherein the plurality of sets of image compensation values respectively correspond to a plurality of light source modules with different curvature forms; and a controller for performing image compensation on an image displayed by the display panel according to one of the plurality of sets of image compensation values, wherein the image compensation module is used for a flat display panel or a curved display panel, and the plurality of storage devices comprises: a first storage device; a second storage device; a controller for storing a plurality of sets of image compensation values for a display panel; and a controller for storing a plurality of sets of image compensation values for a display panel. A device for storing a first set of image compensation values for the display panel, the first set of image compensation values corresponding to a planar light source module, the first set of image compensation values including a plurality of first image compensation values corresponding to a plurality of pixels of the display panel; and a second storage device for storing a second set of image compensation values for the display panel, the second set of image compensation values corresponding to a curved light source module, the second set of image compensation values including a plurality of second image compensation values corresponding to the pixels of the display panel. The image compensation module as described in claim 1, wherein the curved light source module is a positive curved light source module, and the plurality of storage devices further include: a third storage device for storing a third set of image compensation values for the display panel, the third set of image compensation values corresponding to a negative curved light source module, and the third set of image compensation values including a plurality of third image compensation values corresponding to the pixels of the display panel. The image compensation module as described in claim 2, wherein the plurality of storage devices include: a fourth storage device storing a fourth set of image compensation values for the display panel, the fourth set of image compensation values corresponding to a multi-segment curved light source module, the fourth set of image compensation values including a plurality of fourth image compensation values corresponding to the pixels of the display panel. An image compensation module as described in claim 1, wherein the image compensation performed by the controller includes setting the brightness of multiple pixels of the display panel. An image compensation method for a display panel includes: providing a display panel, the display panel including a plurality of pixels; performing a first image compensation operation on the display panel, including: using a planar light source module to allow light provided by the planar light source module to pass through the pixels of the display panel; obtaining a plurality of first brightness data of the pixels; comparing and calculating the first brightness data with a plurality of first theoretical brightness data to establish a first set of image compensation values; and calculating the first set of image compensation values. A first storage device stored on the display panel; and a second image compensation operation is performed on the display panel, including: Using a curved light source module to allow the light provided by the curved light source module to pass through the pixels of the display panel; obtaining a plurality of second brightness data of the pixels; comparing and calculating the second brightness data with a plurality of second theoretical brightness data to establish a second set of image compensation values; and storing the second set of image compensation values in a second storage device on the display panel. The image compensation method as described in claim 5, wherein the curved light source module is a positive curved light source module, and the method further comprises: performing a third image compensation operation on the display panel, comprising: using a reverse curved light source module to allow the light provided by the reverse curved light source module to pass through the pixels of the display panel; obtaining a plurality of third brightness data of the pixels; comparing and calculating the third brightness data with a plurality of third theoretical brightness data to establish a third set of image compensation values; and storing the third set of image compensation values in a third storage device on the display panel. The image compensation method as described in claim 6 further includes: performing a fourth image compensation operation on the display panel, including: using a multi-segment curved light source module to allow the light provided by the multi-segment curved light source module to pass through the pixels of the display panel; obtaining a plurality of fourth brightness data of the pixels; comparing and calculating the fourth brightness data with a plurality of fourth theoretical brightness data to establish a fourth set of image compensation values; and storing the fourth set of image compensation values in a fourth storage device on the display panel. An image compensation method is provided for a display device, the display device comprising a display panel, a light source module, a controller and a plurality of storage devices for storing a plurality of sets of image compensation values. The image compensation method comprises: controlling the controller to read a set of image compensation values corresponding to the bending form of the light source module from the plurality of sets of image compensation values according to the bending form of the light source module; and performing image compensation on the image displayed by the display panel according to the set of image compensation values, wherein the plurality of storage devices The invention comprises: a first storage device for storing a first set of image compensation values for the display panel, the first set of image compensation values corresponding to a planar light source module, the first set of image compensation values including a plurality of first image compensation values corresponding to a plurality of pixels of the display panel; and a second storage device for storing a second set of image compensation values for the display panel, the second set of image compensation values corresponding to a curved light source module, the second set of image compensation values including a plurality of second image compensation values corresponding to the pixels of the display panel.

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