White balance adjustment method for display device, television set and readable storage medium

Abstract

The present invention provides a method for adjusting the white balance of a display device, comprising the following steps: S1. When adjusting white balance data, adjusting a picture quality prototype to a target color coordinate value to obtain a first set of white balance data; performing offset adjustment based on the target color coordinate value to obtain the remaining white balance data, namely, a second set of white balance data, ..., and an Nth set of white balance data, where N is an integer greater than or equal to three; S2. storing all the white balance data obtained in step S1 in a memory device of a TV decoder board, each set of white balance data corresponding to a call interface code value; when the TV decoder board receives the call interface code value, the white balance data corresponding to the call interface code is called. The present invention has the beneficial effect of improving the efficiency of white balance adjustment of a display device (e.g., a liquid crystal television).

Description

Technical Field

[0001] The present invention relates to a display device, and in particular to a white balance adjustment method for a display device, a television set, and a readable storage medium. Background Art

[0002] White balance is an important indicator that determines the quality of LCD TV images. The screen's backlight, diaphragm, and OC (backlight, diaphragm, and OC are referred to as optical materials) have a significant impact on white balance. Different screens have different white balances. During TV production, the screen's white balance needs to be calibrated using software to ensure that the TV's white balance meets the requirements. Existing TV manufacturers' white balance calibration methods are mainly divided into two types:

[0003] The first method: Each motor is calibrated through an automatic white balance debugging device. Each TV can be adjusted to the preset color temperature value, which has a good consistency effect. However, this method takes a long time to adjust, affects the efficiency of the production line, and requires a large investment in production line equipment.

[0004] The second method involves debugging a sample screen to obtain a set of white balance data. All screens made from the same optical material as the sample screen are then produced using this white balance data. This method offers high production efficiency. While it's not possible to achieve the same color temperature across all screens, as long as the color temperature deviation is within a certain range, the user's viewing experience won't be impacted. However, this method has a drawback: optical materials vary in their optical parameter deviations, and manufacturers' optical parameter deviations can also vary between different time periods, leading to positive or negative parameter deviations. After the screens are assembled, if the deviations are significant compared to the debugged screens, even after TV software correction, they still don't meet the requirements. Re-sampling and re-calibration are required to obtain new white balance data for correction. If the TV decoder board has already been produced using the original white balance data, rework and upgrades will be necessary, resulting in financial losses. To avoid this problem, the only way to schedule screen production for each batch is to schedule the production of the TV decoder board only after sampling the white balance data. This is inconvenient to schedule production, and re-calibrating the white balance data for each batch requires significant manpower and resources.

[0005] Therefore, how to improve the efficiency of white balance adjustment of LCD TVs is of great significance to the efficient production of LCD TVs. Summary of the Invention

[0006] In order to solve the problems in the prior art, the present invention provides a white balance adjustment method for a display device, a television, and a readable storage medium.

[0007] The present invention provides a method for adjusting the white balance of a display device, comprising the following steps:

[0008] S1. When debugging white balance data, the image quality prototype is debugged to the target color coordinate value to obtain a first set of white balance data. Based on the target color coordinate value, offset debugging is performed to obtain the remaining white balance data, namely the second set of white balance data, ..., and the Nth set of white balance data, where N is an integer greater than or equal to three;

[0009] S2. All the white balance data obtained in step S1 are stored in the storage device of the TV decoder board. Each set of white balance data corresponds to a calling interface code value. When the TV decoder board receives the calling interface code value, it calls the white balance data corresponding to the calling interface code.

[0010] S3, the buttons on the debugging remote control correspond to the call interface code values ​​in step S2, so that each call interface code value corresponds to a button;

[0011] S4. After the batch of screens are produced, a production prototype is assembled using the TV decoder board in step S2 to confirm the color temperature. The corresponding white balance data is selected based on the color coordinate values ​​obtained by the color temperature meter test, thereby determining the corresponding remote control button;

[0012] S5. When the whole machine is produced, the production line worker completes the white balance adjustment with one click according to the button of the remote control determined in step S4.

[0013] As a further improvement of the present invention, in step S1, the signal source outputs a grayscale signal of a certain point in the dark field to the image quality prototype, and a color temperature meter is used to read the color coordinate value from the display screen of the image quality prototype. If the color coordinate value is not the target color coordinate value, the RGB value or the Gamma value is adjusted so that the color coordinate value reaches the target color coordinate value, and the corresponding RGB value or the Gamma value is the first set of white balance data.

[0014] As a further improvement of the present invention, in step S2, when the TV decoder board receives the calling interface code value, the white balance data corresponding to the calling interface code is called, and the corresponding white balance data is changed to default data to ensure that the default data is called after the power is turned on and off.

[0015] As a further improvement of the present invention, in step S3, a color temperature meter is used to test the color coordinate values ​​of the production prototype in step S2. Based on the tested color coordinate values, the offset of the color coordinates in step 1 is correspondingly determined. The corresponding calling interface code value is selected by pressing the button of the remote control in step 3, and the software calls the corresponding white balance data for correction to ensure that the deviation range is within the allowable range.

[0016] As a further improvement of the present invention, if the tested color coordinate value is within the allowable deviation range of the target color coordinate value, the first set of white balance data is selected; if the tested color coordinate value is not within the allowable deviation range of the target color coordinate value, then according to the deviation amount between the tested color coordinate value and the target color coordinate value corresponding to the offset amount in step S1, a set of white balance data from the second set of white balance data to the Nth set of white balance data is selected for correction, so that the color coordinate value after correction is within the allowable deviation range of the target color coordinate value.

[0017] As a further improvement of the present invention, the display device is a television.

[0018] As a further improvement of the present invention, the display device is a liquid crystal television.

[0019] The present invention also provides a television set, wherein the motor is configured to perform white balance adjustment using the method described during production.

[0020] The present invention also provides a readable storage medium, wherein the readable storage medium stores execution instructions, and when the execution instructions are executed by a processor, they are used to implement the method described.

[0021] The beneficial effect of the present invention is that the efficiency of white balance adjustment of a display device (such as a liquid crystal television) is improved through the above solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other solutions can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 The present invention is a flowchart of a method for adjusting the white balance of a display device.

[0024] Figure 2 This is a code value correspondence diagram of a white balance adjustment method for a display device according to the present invention. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second" and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] The present invention provides a method for adjusting the white balance of a display device, which can be used to adjust the white balance of a display device, such as an LCD television or other display. This embodiment uses an LCD television as the object of white balance adjustment, and the application scenario is an LCD television production factory.

[0031] like Figure 1 As shown, a method for adjusting the white balance of a display device includes the following steps:

[0032] 1. When debugging white balance data, first debug the LCD TV to the target color coordinates to obtain a set of white balance data. Then, based on the target color coordinates, debug the offset to obtain several sets of offset white balance data. You can debug the offset according to the set value to obtain multiple sets of white balance data. The offset and the number of white balance data sets can be adjusted as needed.

[0033] The specific process includes: when debugging the white balance data, the image quality prototype is debugged to the target color coordinate value (this patent takes X: 0.284, Y = 0.294 as an example). The signal source outputs a grayscale signal at a certain point in the dark field to the TV. Use a color temperature meter to read the color coordinate value from the TV display. If the color coordinate value is not the target color coordinate value, adjust the RGB value so that the color coordinate value reaches the target value, and the corresponding RGB value is data 1. Then, based on the target color coordinate, the offset is debugged. The offset can be debugged according to ±0.02. The remaining 6 groups of RGB values ​​are obtained according to the color coordinates in the table below, corresponding to data 2 to 7. The offset and the number of RGB data can be increased or decreased according to the required accuracy. This patent takes 7 groups as an example, see Table 1 for details.

[0034] Table 1

[0035]

[0036] 2. The software of the TV decoder board is designed to store multiple sets of white balance data. The data obtained in step 1 is stored in the storage device of the TV decoder board. Each set of white balance corresponds to a calling interface code value, such as Figure 2 shown.

[0037] The specific process includes: the software of the TV decoder board is designed to store 7 sets of RGB data, and the data obtained in step 1 is stored in the storage device of the TV decoder board. Each set of RGB data corresponds to a call code value. The TV software calls data 1 by default. When the TV receives the code value, it will call the corresponding data and change it to the default data to ensure that the data is called after turning the machine on and off.

[0038] This embodiment is described using RGB data as an example, but a Gamma value may also be used.

[0039] 3. The remote control used for factory debugging has multiple buttons and is numbered, corresponding to the calling interface code values ​​of the multiple sets of white balance data in step 2.

[0040] The specific process includes: the remote control used for factory debugging has 7 buttons and is numbered, corresponding to the calling interface code values ​​of the 7 groups of RGB data in step 2. Figure 2 As shown, button 1 will send code value 1. After receiving code value 1, the TV decoder board will call data 1 to adjust the white balance.

[0041] 4. After batch production of screens, select one of the above white balance data sets based on the screen's own color coordinate values ​​to keep the TV's color temperature deviation within a certain range. For example, if the screen's own color coordinates are too high, select a white balance data set with lower color coordinates to correct it, ensuring that the TV's color scale value is within the target value's allowable deviation range.

[0042] The specific process includes: after the batch of screens are produced, a TV is assembled using the TV decoder board in step 2 to confirm the color temperature. The color coordinate value is tested with a color temperature meter to see whether the color coordinate group is within the allowable deviation range of the target color coordinate value (such as X: 0.284, Y = 0.294). According to the tested color coordinate value, the color coordinate offset value in Table 1 is set. The corresponding code value is selected through the remote control in step 3. The software calls the corresponding RGB data for correction to ensure that the deviation range is within the allowable range. The deviation range can be set according to the quality standards of the industry and the company. This embodiment is illustrated by taking ±0.02 as an example. See Table 2 for details.

[0043] Table 2

[0044]

[0045]

[0046] 5. During TV production, the white balance data number is determined according to step 4. Production line workers can complete white balance adjustment with one click by pressing the corresponding button on the factory remote control.

[0047] The specific process includes: When TV sets are mass-produced, the code value is determined according to step 4. Production line workers complete the white balance adjustment with one click by pressing the corresponding button on the factory remote control to ensure that the color temperature difference is within the acceptable range.

[0048] The present invention provides a white balance adjustment method for a display device, a television, and a readable storage medium, which improve the efficiency of white balance adjustment of liquid crystal televisions, can solve the problem of software upgrade rework caused by differences in color coordinates of screens of different batches, have a wide range of applications, are easy to implement, can effectively improve the image quality of liquid crystal televisions, and are of great significance to the efficient production of liquid crystal televisions.

[0049] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A method for adjusting the white balance of a display device, characterized in that: The following steps are involved: S1. When debugging white balance data, the image quality prototype is debugged to the target color coordinate value to obtain the first set of white balance data. Based on the target color coordinate value, the offset is debugged to obtain the remaining white balance data, namely the second set of white balance data, ..., the Nth set of white balance data; S2. All the white balance data obtained in step S1 are stored in the storage device of the TV decoder board. Each set of white balance data corresponds to a calling interface code value. When the TV decoder board receives the calling interface code value, it calls the white balance data corresponding to the calling interface code. S3, the buttons on the debugging remote control correspond to the call interface code values ​​in step S2, so that each call interface code value corresponds to a button; S4. After the batch of screens are produced, a production prototype is assembled using the TV decoder board in step S2 to confirm the color temperature. The corresponding white balance data is selected based on the color coordinate values ​​obtained by the color temperature meter test, thereby determining the corresponding remote control button; S5. When the whole machine is produced, the production line worker completes the white balance adjustment with one click according to the button of the remote control determined in step S4.

2. The white balance adjustment method for a display device according to claim 1, wherein: In step S1, the signal source outputs a grayscale signal of a certain point in the dark field to the image quality prototype, and a color temperature meter is used to read the color coordinate value from the display screen of the image quality prototype. If the color coordinate value is not the target color coordinate value, the RGB value or Gamma value is adjusted to make the color coordinate value reach the target color coordinate value. The corresponding RGB value or Gamma value is the first set of white balance data.

3. The white balance adjustment method for a display device according to claim 1, wherein: In step S2, when the TV decoder board receives the calling interface code value, it calls the white balance data corresponding to the calling interface code, and changes the corresponding white balance data to the default data to ensure that the default data is called after the power is turned on and off.

4. The method for adjusting the white balance of a display device according to claim 1, wherein: In step S3, a color temperature meter is used to test the color coordinate values ​​of the production prototype in step S2. Based on the tested color coordinate values, the offset of the color coordinates in step 1 is correspondingly determined. The corresponding calling interface code value is selected by pressing the button on the remote control in step 3, and the software calls the corresponding white balance data for correction to ensure that the deviation range is within the allowable range.

5. The method for adjusting the white balance of a display device according to claim 4, wherein: If the tested color coordinate values ​​are within the allowable deviation range of the target color coordinate values, the first set of white balance data is selected. If the tested color coordinate values ​​are not within the allowable deviation range of the target color coordinate values, a set of white balance data from the second set to the Nth set of white balance data is selected for correction based on the deviation between the tested color coordinate values ​​and the target color coordinate values ​​corresponding to the offset in step S1, so that the corrected color coordinate values ​​are within the allowable deviation range of the target color coordinate values.

6. The method for adjusting the white balance of a display device according to claim 1, wherein: The display device is a television.

7. The method for adjusting the white balance of a display device according to claim 1, wherein: The display device is a liquid crystal television.

8. A television set, characterized in that: During production of the television, the white balance is adjusted using the method according to any one of claims 1 to 5.

9. A readable storage medium, characterized in that: The readable storage medium stores execution instructions, which, when executed by a processor, are used to implement the method according to any one of claims 1 to 7.

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