CN100414595C - Color temperature adjusting method and display device using same - Google Patents

Abstract

A color temperature adjustment method includes the following steps: obtaining a first color temperature parameter and a second color temperature parameter, determining whether the difference between the first color temperature parameter and the second color temperature parameter falls within an acceptable range, and storing a first voltage value corresponding to the voltage currently applied to a backlight module in a display device in a storage device in the display device when the difference between the first color temperature parameter and the second color temperature parameter falls within an acceptable range.

Description

Method for adjusting color temperature and display device using the method

technical field

The invention relates to a display device, in particular to a color temperature adjustment method and a display device using the method.

Background technique

In traditional liquid crystal panel (liquid crystal panel, LCD) displays, the ratio of the RGB parameters of the display driver integrated circuit (Scalar IC) is usually controlled by a micro control unit (MicroProcessing Unit) to control the liquid crystal panel to adjust the color temperature. However, this control method is generally inelastic, so a new color temperature adjustment method and a display device using the method are required.

Contents of the invention

In view of this, the object of the present invention is to provide a new color temperature adjustment method and a display device using the method

The embodiment of the present invention discloses a color temperature adjustment method, which includes the following steps: obtaining the first color temperature parameter and the second color temperature parameter, judging whether the difference between the first color temperature parameter and the second color temperature parameter falls within an acceptable range, and when the second color temperature parameter When the difference between the first color temperature parameter and the second color temperature parameter falls within an acceptable range, the first voltage value corresponding to the voltage currently applied to the backlight module in the display device is stored in the storage device in the display device. The display device applies a voltage corresponding to the stored first voltage value to the backlight module when the power is turned on.

In one case, the method further includes determining the second voltage value according to the difference between the first color temperature parameter and the second color temperature parameter when the difference between the first color temperature parameter and the second color temperature parameter does not fall within an acceptable range , and applying a voltage corresponding to the second voltage value to the backlight module in the display device.

In one case, the first color temperature parameter corresponds to a flag, and the flag is used to indicate that the frame corresponding to the first color temperature parameter is a frame with a specific color temperature. The method further includes storing a flag in a storage device in the display device, and the flag is associated with the first voltage value.

The embodiment of the present invention further discloses a computer-readable storage medium for storing computer programs. The computer program is used to be loaded and execute the color temperature adjustment method.

The embodiment of the invention further discloses another display device, which includes a backlight module, a storage device and a processing unit. The storage device stores the first voltage value. The processing unit is coupled to the backlight module and the storage device, reads the first voltage value, and applies a voltage corresponding to the stored first voltage value to the backlight module.

In one case, the processing unit further obtains the first color temperature parameter and the second color temperature parameter, judges whether the difference between the first color temperature parameter and the second color temperature parameter falls within an acceptable range, and when the first color temperature parameter and the second color temperature parameter When the difference between the color temperature parameters falls within an acceptable range, the first voltage value corresponding to the voltage currently applied to the backlight module is stored in the storage device.

In one case, when the difference between the first color temperature parameter and the second color temperature parameter does not fall within an acceptable range, the second voltage value is determined according to the difference between the first color temperature parameter and the second color temperature parameter, and a corresponding The voltage at the second voltage value is sent to the backlight module. Ideally, when a voltage corresponding to the second voltage value is applied to the backlight module, the new color temperature parameter measured by the display device will be closer to the second color temperature parameter than the first color temperature parameter.

In one case, the first color temperature parameter corresponds to a flag, and the flag is used to indicate that the frame corresponding to the first color temperature parameter is a frame with a specific color temperature. The processing unit further stores a flag in the storage device, and the flag is associated with the first voltage value.

The first color temperature parameter and the second color temperature parameter may be CIE chromaticity coordinates. The first color temperature parameter may represent a color temperature parameter detected by the color temperature measuring device, and the second color temperature parameter may represent a reference color temperature parameter. The display device can be a liquid crystal display. The backlight module can be composed of organic light emitting diodes, white light organic light emitting diodes or red, green and blue light organic light emitting diodes, and the first voltage value can represent the voltage corresponding to various organic light emitting diodes currently applied in display devices .

Description of drawings

FIG. 1 is a system architecture diagram showing a color temperature adjustment system according to an embodiment of the present invention;

FIG. 2 is a system architecture diagram showing a liquid crystal display according to an embodiment of the present invention;

Fig. 3 is a diagram showing the hardware architecture of a computer according to an embodiment of the present invention;

FIG. 4 is a method flowchart showing a color temperature adjustment method according to the first embodiment of the present invention;

5 is a schematic diagram showing a computer-readable storage medium for color temperature adjustment according to the first embodiment of the present invention;

FIG. 6 is a method flowchart showing a color temperature adjustment method according to a second embodiment of the present invention;

FIG. 7 is a diagram illustrating a computer-readable storage medium for color temperature adjustment according to a second embodiment of the present invention.

Description of reference symbols

10-color temperature adjustment system; 11-liquid crystal display; 13-color temperature measuring device; 15-computer; 21-digital signal input terminal; 23-analog signal input terminal; 24-microprocessing unit; 25-driver integrated circuit; 26-communication device; 27-storage device; 29-liquid crystal display panel; 291-display module; 293-backlight module; 31-processing unit; 32-memory; 33-storage device; 34-output device; 35-input device; 36-communication Device; 37-bus; S411, S421, S431, S433, S435, S437-process steps; 50-storage medium; 520-computer program for color temperature adjustment; 521-logic for receiving detected color temperature parameters; 522-obtaining reference color temperature parameters Logic; 523-logic for determining whether the color temperature adjustment is over; 524-logic for storing the voltage value corresponding to the voltage currently driving the backlight module; 525-determining/adjusting the logic for the voltage value according to the detected color temperature parameter and the reference color temperature parameter; 526-applying The voltage corresponding to the determined voltage value is given to the logic of the backlight module; S611, S621, S631, S633, S635, S637-process steps; 70-storage media; 720-computer program for color temperature adjustment; 721-logic for receiving detected color temperature parameters; 722-obtain the logic of the color temperature parameter of the reference; 723-the logic of whether the color temperature adjustment is finished; 724-display the liquid crystal display to store the voltage value logic corresponding to the voltage of the current driving backlight module; 725-according to the detected color temperature parameter and the reference color temperature parameter Determine/adjust the logic of the voltage value; 726—indicating that the liquid crystal display can apply the voltage corresponding to the determined voltage value to the logic of the backlight module.

Detailed ways

FIG. 1 is a system architecture diagram showing a color temperature adjustment system 10 according to an embodiment of the present invention, including a liquid crystal display 11 , a color temperature metrology apparatus 13 and a computer 15 . The color temperature measuring device 13 can be connected to the computer 15 through various connection methods, and the computer 15 can be connected to the liquid crystal display 11 through various connection methods.

Fig. 2 is a system architecture diagram showing a liquid crystal display (Liquid Crystal Display, LCD) 11 according to an embodiment of the present invention, including a digital signal input terminal 21, an analog signal input terminal 23, a microprocessing unit (Microprocessing Unit, MPU) 24, a drive Integrated circuit (Scalar IC) 25, communication device 26, storage device 27 and liquid crystal display panel 29. In addition, those skilled in the art can also implement the present invention on other display device configurations. The display panel includes a display module (display module) 291 and a backlight module (backlight module) 293. The backlight module 293 can be composed of white light organic light emitting diode (white light LED), or red light (red light), green light (green light), blue light (blue light) organic light-emitting diodes are used to generate backlight. The storage device 27 may include read only memory (read only memory; ROM), flash memory (flash ROM) and/or random access memory (random access memory; RAM). The driving integrated circuit 25 is used to receive red (R), green (G) and blue (B) signals through the digital signal input terminal 21 or the analog signal input terminal 23 , so as to control the display module 291 to display a specific image. Among them, the red, green and blue signals provide color information of each pixel. A voltage value can be stored in the storage device 27 for the micro-processing unit 24 to read the voltage value and apply a voltage corresponding to the voltage value to the backlight module 293 so that the images displayed on the liquid crystal display 11 have a specific color temperature type. In another case, multiple voltage value records can also be stored in the storage device 27, and each record includes a specific color temperature type, such as reddish or blueish, and corresponding to the voltage applied to the backlight module. The voltage value information of the voltage at 293 is used to allow the micro-processing unit 24 to obtain the color temperature type setting value in the On-Screen Display (OSD), thereby obtaining the voltage value in the voltage value record that meets the conditions, And apply a voltage corresponding to the voltage value to the backlight module 293, so that the picture displayed by the liquid crystal display 11 has a specific color temperature type specified by the screen display setting.

FIG. 3 is a hardware architecture diagram showing a computer 15 according to an embodiment of the present invention, which includes a processing unit 31, a memory 32, a storage device 33, an output device 34, an input device 35, and a communication device 36, which are connected by a bus 37. Together. In addition, those skilled in the art can also implement the computer 15 on other computer system configurations (configuration), for example, multi-processor systems, microprocessor-based or programmable consumer electronics (microprocessor-based orprogrammable consumer electronics), network computers, minicomputers, mainframes, notebook computers, and similar devices. The processing unit 31 may include a single central-processing unit (CPU) or a plurality of parallel processing units associated with a parallel processing environment. The memory 32 includes a read only memory (read only memory; ROM), a flash memory (flsh ROM) and/or a random access memory (random access memory; RAM), for storing program modules and data that can be executed by the processing unit 31. Generally speaking, the program modules include routines, programs, objects, components, etc., for performing the color temperature adjustment function. The invention may also be practiced in distributed computing environments where computing tasks are performed by remote processing devices that are linked through a communications network. In a distributed environment, the functions of computer 15 may be performed by both local and remote computer systems.

When the backlight module 293 in the liquid crystal display 11 produces backlight, the color temperature measuring device 13 can repeatedly detect the color temperature parameter of the picture displayed by the liquid crystal display 11, which is CIE chromaticity coordinates (chromaticity coordinates) in a better case, and will detect The obtained color temperature parameters are sent to the computer 15.

first embodiment

The computer 15 periodically obtains the detected color temperature parameters from the color temperature measuring device 13 and sends them to the micro-processing unit 24 in the liquid crystal display 11 .

FIG. 4 is a flow chart showing the color temperature adjustment method according to the first embodiment of the present invention. This method is executed by the micro-processing unit 24 in the liquid crystal display 11 . In step S411 , the computer 15 receives the color temperature parameter detected by the color temperature detection device 13 . In step S421, a reference color temperature parameter is obtained, which is a predetermined value. In step S431, it is determined whether the color temperature adjustment is finished according to the difference between the two, if yes, the process of step S433 is performed, otherwise, the process of step S435 is performed. In step S431, it is determined whether the difference between the detected color temperature parameter and the reference color temperature parameter falls within an acceptable range, and if so, the entire color temperature adjustment process ends. In step S433, store the voltage value corresponding to the voltage currently driving the backlight module 293 into the storage device 27, so that the liquid crystal display 11 can first read the stored voltage value when the power is turned on, and apply the voltage value corresponding to the read value. The voltage of the backlight module 293 is supplied. It should be noted here that if the backlight module 293 is composed of white OLEDs, this voltage value represents the voltage for driving the white OLEDs. In addition, if the backlight module 293 is composed of red, green and blue OLEDs , then the voltage values respectively represent the voltages for driving red, green and blue OLEDs. In step S435, the voltage value for driving the backlight module 293 is determined/adjusted according to the difference between the two. In step S437, a voltage corresponding to the determined voltage value is applied to the backlight module 293. Ideally, when a voltage corresponding to the determined voltage value is applied to the backlight module 293 , the new color temperature parameter detected by the color temperature detection device 13 will be closer to the reference color temperature parameter than the previously detected color temperature parameter.

Moreover, the first embodiment of the present invention further proposes a computer-readable storage medium for storing a computer program, and the computer program is used to realize the color temperature adjustment method, and these methods will execute the above-mentioned steps. FIG. 5 is a diagram illustrating a computer-readable storage medium for color temperature adjustment according to a first embodiment of the present invention. The storage medium 50 is used to store the color temperature adjustment computer program 520, and its computer program includes six logics, respectively receiving the detected color temperature parameter logic 521, obtaining the reference color temperature parameter logic 522, determining whether the color temperature adjustment is finished logic 523, storing The voltage value logic 524 corresponding to the current driving voltage of the backlight module, the decision/adjustment voltage value logic 525 according to the detected color temperature parameter and the reference color temperature parameter, and the voltage corresponding to the determined voltage value are applied to the backlight module logic 526 .

second embodiment

The computer 15 periodically obtains the detected color temperature parameters from the color temperature measuring device 13 .

FIG. 6 is a method flowchart showing a color temperature adjustment method according to a second embodiment of the present invention. This method is executed by the processing unit 31 in the computer 15 . In step S611 , the detected color temperature parameter is received by the color temperature measuring device 13 . In step S621, a reference color temperature parameter is obtained, which is a predetermined value. In step S631, it is determined whether the color temperature adjustment is finished according to the difference between the two, if yes, proceed to step S633; otherwise, proceed to step S635. In step S631, it is determined whether the difference between the detected color temperature parameter and the reference color temperature parameter falls within an acceptable range, and if so, the whole color temperature adjustment process ends. In step S633, instruct the microprocessing unit 24 in the liquid crystal display 11 to store the voltage value corresponding to the current driving voltage of the backlight module 293 in the storage device 27, so that the liquid crystal display 11 can first read the stored voltage value when the power is turned on , and apply a voltage corresponding to the read voltage value to the backlight module 293 . In step S635, the voltage value for driving the backlight module 293 is determined/adjusted according to the difference between the two. In step S637 , instruct the microprocessing unit 24 in the liquid crystal display 11 to apply a voltage corresponding to the determined voltage value to the backlight module 293 .

Moreover, the second embodiment of the present invention further proposes a computer-readable storage medium for storing a computer program, and the computer program is used to realize the color temperature adjustment method, and these methods will execute the above-mentioned steps. FIG. 7 is a diagram illustrating a computer-readable storage medium for color temperature adjustment according to a second embodiment of the present invention. The storage medium 70 is used to store the color temperature adjustment computer program 720, and its computer program includes six logics, respectively receiving the detected color temperature parameter logic 721, obtaining the reference color temperature parameter logic 722, determining whether the color temperature adjustment is finished logic 723, indicating The liquid crystal display stores the voltage value logic 724 corresponding to the current driving voltage of the backlight module, determines/adjusts the voltage value logic 725 according to the detected color temperature parameter and the reference color temperature parameter, and instructs the liquid crystal display to apply a voltage corresponding to the determined voltage value Give backlight module logic 726 .

It should be noted here that the above-mentioned color temperature adjustment method can adjust multiple sets of voltage values and store them in the storage device 27 . For example, in step S421/S621, the reference color temperature parameter of bluishness can be obtained, and the voltage value for making the picture bluishness can be adjusted accordingly, and the voltage value can be stored in the storage device 27 . In addition, in step S421/S621, the reddish reference color temperature parameter can be obtained, and the voltage value that can make the screen reddish can be adjusted accordingly, and the voltage value can be stored in the storage device 27 . And each stored voltage value can be added with an identification mark, which is used to indicate that when the voltage value is applied to the backlight module 293, the screen will be bluish or reddish.

It should be noted here that if the backlight module 293 is composed of white OLEDs, the stored voltage value represents the voltage for driving the white OLEDs. In addition, if the backlight module 293 is composed of red, green and blue OLEDs formed, the stored voltage values respectively represent the voltages for driving red, green and blue OLEDs.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, this The scope of protection of the invention shall be defined by the scope of the appended patent application.

Claims (7)

1. color temperature adjusting method, its method comprises:

Obtain first color temperature parameters and second color temperature parameters;

Judge whether the difference between above-mentioned first color temperature parameters and above-mentioned second color temperature parameters falls into an acceptable scope; And

When the difference between above-mentioned first color temperature parameters and above-mentioned second color temperature parameters fell into above-mentioned acceptable scope, storage was corresponding to first magnitude of voltage of the present voltage that puts on the backlight module in the display device extremely in the memory storage in the above-mentioned display device,

Make above-mentioned display device when electric power starting, apply corresponding to the voltage of first magnitude of voltage of above-mentioned storage and give above-mentioned backlight module;

When the difference between above-mentioned first color temperature parameters and above-mentioned second color temperature parameters does not fall into above-mentioned acceptable scope, determine second magnitude of voltage according to the difference between above-mentioned first color temperature parameters and above-mentioned second color temperature parameters; And

Apply corresponding to the voltage of the above-mentioned second magnitude of voltage above-mentioned backlight module to the above-mentioned display device.

2. temperature method of adjustment as claimed in claim 1, wherein, described first color temperature parameters is corresponding to a mark, and above-mentioned mark is in order to point out that the picture corresponding to above-mentioned first color temperature parameters is the picture with specific colour temperature.

3. temperature method of adjustment as claimed in claim 2 in storing step, is more stored the above-mentioned above-mentioned memory storage that is tagged in the above-mentioned display device, and above-mentioned mark is associated with above-mentioned first magnitude of voltage.

4. display device comprises:

Backlight module;

Memory storage is stored first magnitude of voltage; And

Processing unit is coupled to above-mentioned backlight module and above-mentioned memory storage, reads above-mentioned first magnitude of voltage, applies corresponding to the voltage of first magnitude of voltage of above-mentioned storage and gives above-mentioned backlight module;

Described processing unit is obtained first color temperature parameters and second color temperature parameters, judge whether the difference between above-mentioned first color temperature parameters and above-mentioned second color temperature parameters falls into an acceptable scope, and when the difference between above-mentioned first color temperature parameters and above-mentioned second color temperature parameters fell into above-mentioned acceptable scope, storage was corresponding to above-mentioned first magnitude of voltage of the present voltage that puts on above-mentioned backlight module extremely in the above-mentioned memory storage;

Described processing unit is not more when the difference between above-mentioned first color temperature parameters and above-mentioned second color temperature parameters falls into above-mentioned acceptable scope, determine second magnitude of voltage according to the difference between above-mentioned first color temperature parameters and above-mentioned second color temperature parameters, and apply corresponding to the voltage of above-mentioned second magnitude of voltage above-mentioned backlight module extremely.

5. display device as claimed in claim 4, wherein, described first color temperature parameters representative is by the detected color temperature parameters of a colour temperature measurement device, and above-mentioned second color temperature parameters is represented the benchmark color temperature parameters.

6. display device as claimed in claim 4, wherein, described first color temperature parameters is corresponding to a mark, and above-mentioned mark is in order to point out that the picture corresponding to above-mentioned first color temperature parameters is the picture with specific colour temperature.

7. display device as claimed in claim 6, wherein, described processing unit is more stored the above-mentioned above-mentioned memory storage that is tagged to, and above-mentioned mark is associated with above-mentioned first magnitude of voltage.

Images