TWI653622B - Display and color correction method - Google Patents

Abstract

The invention discloses a display device and a color correction method. The display device includes a display panel, a backlight module, a first sensing unit, a second sensing unit, and a processing module. The first sensing unit senses real-time ambient light information in an environment in which the display device is located. The second sensing unit is disposed on one side of the backlight module. The processing module estimates the target display brightness according to the real-time ambient light information and adjusts the backlight intensity of the backlight module to the adjusted backlight intensity, so that the display brightness of the display panel is substantially the same as the target display brightness. The second sensing unit senses the adjusted backlight information of the backlight module. The processing module estimates the color gain compensation value required by the display panel according to the adjusted backlight information and the real-time ambient light information, and displays the image after compensating the color of the display panel according to the color gain compensation value.

Description

Display device and color correction method

The present invention relates to color correction, and more particularly to a display device and a color correction method applied to the display device.

The current display device can automatically adjust the backlight intensity of the backlight module in accordance with the ambient light brightness detection, so that the user's eyes are not burdened by the brightness of the ambient light, and the display device can be matched with the color light detection of the ambient light. The color temperature of the front of the display panel can be consistent with the ambient light, and it can make people feel more comfortable when viewing the display device.

However, in the process of adjusting the backlight intensity of the display device in accordance with the color performance of the ambient light, the backlight emitted by the backlight module is often affected by factors such as driving current or long-term use causing degradation, resulting in brightness of the front side of the display panel. And the chromaticity also changes and deviates from the color performance that is consistent with the ambient light, and the feeling is worse when the human eye views the display device.

In view of this, the present invention provides a display device and a color correction method to effectively solve the above problems encountered in the prior art.

A color correction method in accordance with an embodiment of the present invention. In this embodiment, the color correction method is applied to a display device. The display device includes a display panel and a backlight module. The color correction method comprises the following steps: (a) sensing the real-time ambient light information in the environment where the display device is located; (b) estimating the target display brightness according to the real-time ambient light information; (c) adjusting the backlight intensity of the backlight module to the adjusted state The backlight intensity is such that the display brightness of the display panel is substantially the same as the target display brightness; (d) sensing the adjusted backlight information of the backlight module and estimating the color gain required by the display panel according to the adjusted backlight information and the real-time ambient light information The compensation value; and (e) displaying the image after compensating the color of the display panel according to the color gain compensation value.

In an embodiment, the step (c) further comprises: adjusting the backlight intensity of the backlight module according to the panel brightness characteristic information and the target display brightness, wherein the panel brightness feature information corresponds to the penetration characteristic of the display panel.

In one embodiment, the panel brightness characteristic information is generated when the display device is shipped from the factory, and is generated according to the following steps: (f1) when the backlight module sends the first backlight to the display panel, sensing the first brightness of the display panel before the display panel (f2) when the backlight module emits the second backlight to the display panel, sensing the second brightness information of the display panel in front of the display panel, wherein the second backlight is different from the first backlight; and (f3) according to the first backlight The first brightness information, the second backlight and the second brightness information calculation panel brightness feature information; wherein the step (f3) further comprises: calculating the panel brightness feature information according to the interpolation method.

In an embodiment, the step (d) further comprises: (d1) estimating the restored color gain compensation value according to the adjusted backlight information and the color target information; and (d2) estimating the color according to the real-time ambient light information and the restored color gain compensation value. Gain compensation value.

In an embodiment, the color target information is a color pre-condition of the backlight module. The set value and the restored color gain compensation value are estimated based on the difference between the adjusted backlight information and the color target information.

In an embodiment, the step (d1) further includes: when the display device is shipped from the factory, when the backlight module sends the first backlight to the display panel, sensing the first color information of the display panel in front of the display panel; When the second backlight is emitted to the display panel, the second color information of the display panel is sensed in front of the display panel, wherein the second backlight is different from the first backlight; and according to the first backlight, the first color information, the second backlight, and the second Color information calculates color target information.

In an embodiment, the step (d2) further includes: setting a complex array color temperature section; determining that the real-time ambient light information belongs to the first color temperature section in the complex array color temperature section; and determining the first color temperature section and the restored color The gain compensation value determines the color gain compensation value.

Another embodiment in accordance with the present invention is a display device. In this embodiment, the display device includes a display panel, a backlight module, a first sensing unit, a second sensing unit, and a processing module. The backlight module is used to emit a backlight to the display panel. The first sensing unit is configured to sense real-time ambient light information in an environment in which the display device is located. The second sensing unit is disposed on one side of the backlight module. The processing module is respectively coupled to the display panel, the backlight module, the first sensing unit and the second sensing unit. The processing module estimates the target display brightness according to the real-time ambient light information and adjusts the backlight intensity of the backlight module to the adjusted backlight intensity, so that the display brightness of the display panel is substantially the same as the target display brightness. The second sensing unit senses the adjusted backlight information of the backlight module. The processing module estimates the color required by the display panel based on the adjusted backlight information and the real-time ambient light information. The color gain compensation value is displayed by compensating the color of the display panel according to the color gain compensation value.

Compared with the prior art, the display device and the color correction method of the present invention firstly sense the chromaticity and brightness change information of the ambient light through the ambient light sensor and estimate the target display brightness that the display panel should have, and then Adjusting the backlight intensity emitted by the backlight module so that the display brightness of the display panel is substantially the same as the target display brightness, and then sensing the adjusted backlight intensity through the backlight sensor and estimating the color gain compensation value required by the display panel. The image is displayed after the color of the display panel is compensated according to the color gain compensation value.

Therefore, even if the backlight emitted by the backlight module changes, the brightness and chromaticity of the light emitted from the front of the display panel deviate from the color performance consistent with the ambient light, the present invention can adjust the backlight module according to the ambient light information that is sensed immediately. The backlight intensity compensates the color of the display panel according to the adjusted backlight intensity and panel characteristic information, thereby effectively compensating for the color attenuation of the backlight module, so that the brightness and chromaticity of the front side of the display panel maintain the color performance consistent with the ambient light. And people can have a more comfortable feeling when watching the display device.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

S1~S5, S10~S20, S21~S25, S31~S35‧‧‧ steps

1‧‧‧ display device

10‧‧‧ display panel

12‧‧‧Backlight module

14‧‧‧First sensing unit

16‧‧‧Processing module

18‧‧‧Second sensing unit

19‧‧‧ storage unit

20‧‧‧ third sensing unit

L‧‧‧Backlight

AL‧‧‧ Ambient light

IF1‧‧‧ Instant Ambient Light Information

IF2‧‧‧ Adjusted backlight information

160‧‧‧ processor

162‧‧‧ scaler

1 is a functional block diagram of a display device in accordance with an embodiment of the present invention.

2 is a diagram showing display in another embodiment of the present invention. Functional block diagram of the device.

3 is a flow chart showing a color correction method in accordance with another embodiment of the present invention.

4A-4B are flow diagrams illustrating a color correction method in accordance with another embodiment of the present invention.

FIG. 5 illustrates a schematic diagram of a third sensing unit that senses the display panel.

FIG. 6 is a flow chart showing an embodiment of generating panel brightness characteristic information.

Figure 7 is a flow chart showing one embodiment of generating color target information.

A preferred embodiment of the invention is a display device. In this embodiment, the display device has a color correction function, which can maintain the brightness and chromaticity of the front side of the display device to maintain a color expression consistent with the ambient light, so that the user can have a more comfortable feeling when viewing the display device. .

Please refer to FIG. 1. FIG. 1 is a functional block diagram of a display device in this embodiment. As shown in FIG. 1 , the display device 1 includes a display panel 10 , a backlight module 12 , a first sensing unit 14 , a processing module 16 , a second sensing unit 18 , and a storage unit 19 . The processing module 16 is coupled to the display panel 10, the backlight module 12, the first sensing unit 14, the second sensing unit 18, and the storage unit 19. The second sensing unit 18 is disposed on one side of the backlight module 12 for sensing the intensity value and the chromaticity value of the light emitted by the backlight module 12 .

In practical applications, the display panel 10 can be any image that can be provided. A display panel, such as a liquid crystal display panel, but not limited thereto; the processing module 16 can be any processor that can provide data processing functions, such as a microcontroller (microcontroller), but not limited thereto; 19 may be any memory having a data storage function, such as a random access memory (RAM) or a read-only memory (ROM), but not limited thereto; the first sensing The unit 14 can be any photo sensor having an ambient light sensing function, and can be disposed on a surface of the casing (not shown) of the display device 1, preferably disposed above the surface of the casing of the display device 1; Unit 18 can be any light sensor with backlight brightness and chrominance sensing capabilities.

In this embodiment, the backlight module 12 is used to emit the backlight L to the display panel 10. The first sensing unit 14 is configured to sense the real-time ambient light information IF1 of the ambient light AL in the environment in which the display device 1 is located, and transmit the real-time ambient light information IF1 to the processing module 16 . In an actual application, the real-time ambient light information IF1 sensed by the first sensing unit 14 may include the ambient light brightness, the ambient light color, and the ambient light color temperature of the ambient light AL in the environment in which the display device 1 is located. Information, but not limited to this.

When the processing module 16 receives the real-time ambient light information IF1, the processing module 16 can estimate the target display brightness that should be present on the display surface of the display panel 10 according to the instantaneous ambient light brightness in the real-time ambient light information IF1. In a practical application, the storage unit 19 can store a lookup table, and the lookup table includes a correspondence between the target display brightness of the display panel 10 and the ambient light brightness, so that the processing module 16 can find out from the lookup table stored in the storage unit 19. The target display brightness corresponding to the brightness of the instant ambient light. In addition, the processing module 16 can also store the real-time ambient light information IF1 in the storage unit 19, For subsequent use.

Then, the processing module 16 determines whether the display brightness of the display panel 10 is substantially the same as the target display brightness according to the lookup table and the light intensity emitted by the current backlight module 12. When the display brightness of the display panel 10 is not substantially the same as the target display brightness, the processing module 16 starts to adjust the backlight intensity of the backlight module 12 until the display brightness of the display panel 10 is substantially the same as the target display brightness. . It should be noted that the processing module 16 can adjust the backlight intensity of the backlight module 12 according to the target display brightness and a panel brightness feature information, but not limited thereto, the panel brightness feature information corresponds to the penetration characteristic of the display panel. That is, the light emitted by the backlight of the same light intensity penetrates different display panels, and the brightness measured on the other side of the display panel varies according to different display panels, mainly due to the difference caused by the material or the process. .

For example, when the processing module 16 adjusts the backlight intensity of the backlight module 12 to an adjusted backlight intensity, the second sensing unit 18 senses an adjusted backlight information IF2 of the backlight module 12. In fact, the adjusted backlight information IF2 may include information such as the adjusted backlight brightness of the backlight module 12 and the adjusted backlight intensity, but is not limited thereto. Then, the processing module 16 estimates the adjusted display brightness of the corresponding display panel 10 according to the adjusted backlight brightness in the adjusted backlight information IF2 and determines whether the adjusted display brightness is substantially the same as the target display brightness.

When the brightness of the display panel 10 is not substantially the same as the target display brightness, the correction of the backlight intensity is not completed, and the processing module 16 continues to adjust the backlight intensity of the backlight module 12; when the processing module 16 determines the display Panel 10 When the adjusted display brightness is substantially the same as the target display brightness, the correction of the backlight intensity of the backlight module 12 by the display device 1 is completed, and the processing module 16 stops adjusting the backlight intensity of the backlight module 12.

Next, the display device 1 also needs to decide whether or not to compensate the color of the display panel 10. For example, the processing module 16 can determine whether the instantaneous ambient light color temperature in the real-time ambient light information IF1 is substantially the same as the display color temperature of the display panel 10.

When the instantaneous ambient light color temperature in the instant ambient light information IF1 is substantially the same as the display color temperature of the display panel 10, the color representing the display panel 10 should not be compensated; when the instant ambient light information IF1 is not the approximate ambient light color temperature When the display color temperature of the display panel 10 is the same (the color temperature is the same in the same color temperature section), the color of the display panel 10 needs to be compensated. At this time, the processing module 16 adjusts the backlight according to the adjusted backlight information IF2. The intensity and the instantaneous ambient light color temperature in the real-time ambient light information IF1 are used to estimate the color gain compensation value required by the display panel 10. The processing module 16 performs color compensation on the image signal to be input to the display panel 10 according to the color gain compensation value. Transfer to the display panel 10 displays the compensated image.

In the actual application, the processing module 16 can store the real-time ambient light information IF1, the adjusted backlight information IF2, and the color gain compensation value in the storage unit 19, but not limited thereto. The processing module 16 may first estimate a restored color gain compensation value to compensate for the attenuation according to a difference between the adjusted backlight intensity in the adjusted backlight information IF2 and a color target information (eg, the color target value of the backlight module 12). Backlight color, and then based on the restored color gain compensation value and the real-time ambient light color temperature in the real-time ambient light information IF1, the color gain compensation value is estimated to adjust the color of the environment according to the ambient light, or The processing module 16 directly estimates the color gain compensation value required by the display panel 10 according to the adjusted backlight intensity and color target information in the adjusted backlight information IF2, and is not particularly limited.

It should be noted that, when the display device 10 is shipped from the factory, when the backlight module 12 issues a complex array of different backlight values to the display panel 10, the complex array color information can be measured in front of the display panel 10 and is processed by the processing module 16 The complex array of different backlight values and the color information of the complex array are used to calculate the color target information, which will be further described in the following paragraphs.

In addition, the processing module 16 can first set the complex array color temperature section and determine whether the instant ambient light color temperature in the real-time ambient light information IF1 belongs to any of the color temperature sections of the complex array color temperature section. For example, it is assumed that the processing module 16 first sets three sets of color temperature sections according to the order of low color temperature to high color temperature: first color temperature section (<4000K), second color temperature section (4000K~5500K), and The three-color temperature section (>5500K), if the processing module 16 determines that the instantaneous ambient light color temperature in the instant ambient light information IF1 is 3800K, that is, the instantaneous ambient light color temperature in the instant ambient light information IF1 belongs to the above three sets of color temperature sections. In the first color temperature section, the processing module 16 determines the color gain compensation value according to the restored color gain compensation value and the first color temperature section. The rest of the situation can be deduced by analogy, and will not be described here. Of course, the processing module 16 can also set more color temperature segments, such as nine color temperature segments, to more accurately determine the color gain compensation value, but not limited thereto.

In practical applications, as shown in FIG. 2 , the processing module 16 may also include a processor 160 and a scaler 162 . The processor 160 is coupled to the first sensing respectively. The unit 14 and the second sensing unit 18 and the storage unit 19 are configured to receive the real-time ambient light information IF1 sensed by the first sensing unit 14 and the adjusted backlight information IF2 sensed by the second sensing unit 18, respectively. The real-time ambient light information IF1 and the adjusted backlight information IF2 are stored in the storage unit 19; the scaler 162 is coupled to the display panel 10, the backlight module 12, and the processor 160, respectively, for the fixed resolution of the display panel 10 ( Native resolution adjusts the resolution of the image signal and controls the operation of the display panel 10 and the backlight module 12. In fact, the processor 160 and the scaler 162 can be integrated or independently set without any particular limitation.

Another preferred embodiment in accordance with the present invention is a color correction method. In this embodiment, the color correction method is applied to a display device. The display device includes a display panel and a backlight module. Please refer to FIG. 3. FIG. 3 is a flow chart showing a color correction method in this embodiment. As shown in FIG. 3, in this embodiment, the color correction method may include the following steps: S1: sensing real-time ambient light information in an environment where the display device is located; S2: estimating target display brightness according to real-time ambient light information; S3: Adjusting the backlight intensity of the backlight module to adjust the backlight intensity, so that the display brightness of the display panel is substantially the same as the target display brightness; S4: sensing the adjusted backlight information of the backlight module and adjusting the backlight information and the real-time ambient light information Estimating the color gain compensation value required by the display panel; and S5: displaying the image after compensating the color of the display panel according to the color gain compensation value.

It should be noted that the real-time ambient light information in step S1 may actually include information such as real-time ambient light brightness, real-time ambient light color, and instant ambient light color temperature, but is not limited thereto; step S3 may be based on panel brightness characteristic information. Adjusting the backlight intensity of the backlight module with the target display brightness, but not limited thereto; step S4 may first estimate the restored color gain compensation value according to the difference between the adjusted backlight information (such as the adjusted backlight intensity) and the color target information. Or, according to the preset color value at the factory, the restored color gain compensation value is estimated. For example, the white light emitted by the factory backlight module is not attenuated, and the red color measured by the color measurement is r1 value and green The g1 value and the blue value are the b1 value. When the component is aged for a period of time, the white light of the backlight module is measured again, the red is the r2 value, the green is the g2 value, and the blue is the b2 value, in order to make up the original White light chromaticity must be estimated according to the difference red for r1-r2 value, green for g1-g2 value and blue for b1-b2 value, and then according to real-time ambient light information and reduction Color gain compensation value compensation value estimated color gain, color gain reducing color shift compensation module may compensate for the backlight value is mainly caused by aging due element.

In addition, step S4 may also first set a complex array color temperature section and determine whether the instant ambient light information belongs to any color temperature section of the complex array color temperature section and determine the color according to the color temperature section and the restored color gain compensation value. Gain compensation value. For example, if the instant ambient light information belongs to the first color temperature segment in the complex array color temperature segment, step S4 may determine the color gain compensation value according to the first color temperature segment and the restored color gain compensation value, but not This is limited to this.

As shown in FIG. 4A to FIG. 4B, in another embodiment, the color correction method may include the following steps: S10: sensing real-time ambient light information in the environment where the display device is located; S11: estimating the target display brightness according to the instantaneous ambient light brightness in the real-time ambient light information; S12: determining whether the display brightness of the display panel is the same as the target display brightness; S13 : when the judgment result of step S12 is no, the backlight intensity of the backlight module is adjusted; S14: the brightness of the backlight after the adjustment of the backlight module is sensed; S15: estimating the brightness of the display panel after adjusting the brightness of the backlight according to the adjusted brightness If the result of the determination in step S15 is NO, step S13 is re-executed; S16: when the result of the determination in step S12 or S15 is YES, it is determined whether the instantaneous ambient light color temperature in the instant ambient light information is displayed on the display panel. The color temperature is the same; S17: when the judgment result of step S16 is no, the backlight intensity of the backlight module is sensed; S18: estimating the display panel according to the adjusted backlight intensity and the real-time ambient light color temperature in the real-time ambient light information The color gain compensation value; S19: compensating the color of the display panel according to the color gain compensation value; and S20: Video signal sent to the display panel and display the image compensation.

Next, how the panel brightness characteristic information is generated by the present invention will be described.

Please refer to FIG. 5 and FIG. 6 simultaneously. FIG. 5 is a schematic diagram of a third sensing unit for sensing the light emitting surface of the display panel in front of the display panel. FIG. 6 is a diagram showing the brightness information of the panel. A flow chart of an embodiment.

As shown in FIG. 5 , the processing module 16 is coupled to the display panel 10 , the backlight module 12 , the second sensing unit 18 , and the third sensing unit 20 . The backlight module 12 emits a backlight L to the display panel 10. The second sensing unit 18 and the third sensing unit 20 are respectively disposed on one side of the backlight module 12 and the display panel 10 for sensing the backlight module 12 and the display panel 10 respectively.

When the display device 1 is shipped from the factory, the backlight module 12 can sequentially output a plurality of backlights of different powers to the display panel 10 to calculate panel brightness characteristic information. For example, the backlight module 12 sequentially emits two backlights of different powers to the display panel 10. When the backlight module 12 sends the first backlight to the display panel 10 (step S21 in FIG. 6), the third sensing unit 20 The first brightness information sent by the display panel 10 is sensed in front of the display panel 10 (step S22 in FIG. 6) and transmitted to the processing module 16; when the backlight module 12 emits a second backlight to the display panel 10 (FIG. 6) In step S23), the third sensing unit 20 can sense the second brightness information (step S24 in FIG. 6) emitted by the display panel 10 before the display panel 10 and transmit the result to the processing module 16. Then, the processing module 16 calculates the panel brightness feature information according to the first backlight, the first brightness information, the second backlight and the second brightness information (step S25 in FIG. 6), and can store the panel brightness feature information in the storage unit. Within 19.

When the processing module 16 receives the first back issued by the backlight module 12 The processing module 16 can be used when the first backlight intensity of the light, the first brightness information of the display panel 10, the second backlight intensity of the second backlight emitted by the backlight module 12, and the second brightness information of the display panel 10 The first segment backlight intensity, the first brightness information, the second segment backlight intensity, and the second brightness information are calculated by an algorithm (for example, interpolation, but not limited thereto) to obtain panel brightness characteristic information (for example, Panel brightness feature matrix, but not limited to this).

It should be noted that the panel brightness characteristic information obtained by the processing module 16 may include a correspondence relationship between the display brightness of the display panel 10 and the backlight intensity of the backlight module 12, such as a nonlinear correspondence, but not Limit, and interpolation can be made between different measurement sampling points to obtain the relative relationship of the unmeasured points. Therefore, before the panel brightness characteristic information is maintained, the processing module 16 can estimate the backlight intensity of the backlight emitted by the backlight module 12 according to the display brightness of the display panel 10 and the panel brightness characteristic information. Or, according to the backlight intensity of the backlight module 12, the display brightness in front of the display panel 10 is estimated corresponding to the panel brightness characteristic information.

For example, it is assumed that the display brightness of the display panel 10 sensed by the third sensing unit 20 is X, the backlight intensity of the backlight module 12 sensed by the second sensing unit 18 is Y, and the panel brightness characteristic information is Z. If the display brightness X of the display panel 10 is equal to the product of the backlight intensity Y of the backlight module 12 and the panel brightness characteristic information Z, that is, X=Y*Z. When the backlight intensity of the backlight module 12 sensed by the second sensing unit 18 is changed from Y to Y′, the display brightness of the display panel 10 is also changed from X to X′, and the display panel 10 is changed. The display brightness X' will be equal to the backlight of the backlight module 12 after the backlight is strong The product of the degree Y' and the panel luminance characteristic information Z, that is, X' = Y' * Z. The rest can be deduced by analogy and will not be described here.

In addition, after the display device 1 is used for a long period of time, the panel brightness characteristic information originally used may be changed. Therefore, an external color correction device can be used to match the second sensing unit 18 and the third sense inside the display device 1. The measuring unit 20 re-executes the steps S21 S S25 in FIG. 6 , and then recalculates the new panel brightness feature information by the processing module 16 and updates and replaces the panel brightness feature information originally stored by the storage unit 19 with the new panel brightness feature information.

Similarly, please refer to FIG. 5 and FIG. 7 simultaneously. FIG. 7 is a flow chart showing an embodiment of generating color target information. When the display device 1 is shipped from the factory, the backlight module 12 can sequentially emit a plurality of backlights of different powers to the display panel 10. For example, the backlight module 12 sequentially emits two backlights of different powers to the display panel 10. When the backlight module 12 sends the first backlight to the display panel 10 (step S31 in FIG. 7), the third sensing unit 20 The first color information of the display panel 10 can be sensed in front of the display panel 10 (step S32 in FIG. 7) and transmitted to the processing module 16; when the backlight module 12 emits a second backlight to the display panel 10 (FIG. 7) In step S33), the third sensing unit 20 can sense the second color information of the display panel 10 (step S34 in FIG. 7) before the display panel 10 and transmit it to the processing module 16. The processing module 16 can calculate the color target information according to the first backlight, the first color information, the second backlight and the second color information (step S35 in FIG. 7), and store the color target information in the storage unit 19. .

The color target information obtained by the processing module 16 includes the instant color information of the display panel 10 and the different backlight intensity emitted by the backlight module 12. Corresponding relationship, the backlight intensity of the backlight module 12 can be estimated according to the instant color information of the display panel 10 and the color target information, or the backlight intensity of the backlight module 12 can be estimated according to the color target information. The color information that panel 10 should have.

It should be noted that the third sensing unit 20 for sensing the display panel 10 may be a colorimeter. When the backlight module 12 respectively emits different backlight intensities to the display panel 10, the colorimeter disposed in front of the display panel 10 can respectively measure color information of pure white, pure red, pure blue, and pure green on the display panel 10 (for example, The intensity value of the chromaticity and the brightness) is compensated by the display panel 10 to emit pure white light in front of the display panel 10, thereby achieving the effect of compensating for the color attenuation of the backlight module 12. In fact, according to the principle of the light of the three primary colors of light, if the color information of pure red, pure blue and pure green on the display panel 10 respectively measured by the colorimeter is added, the display panel 10 can also be obtained. The pure white color information.

In addition, after the display device 1 is used for a long period of time, the originally used color target information may lose accuracy due to the change of the panel characteristics. Therefore, an external color correction instrument may be used to match the second sensing inside the display device 1. The unit 18 re-executes the steps S31-S35 in FIG. 7, and the processing module 16 recalculates the new color target information and updates and replaces the color target information originally stored by the storage unit 19 with the new color target information.

Compared with the prior art, the display device and the color correction method of the present invention firstly sense the chromaticity and brightness change information of the ambient light through the ambient light sensor and estimate the target display brightness that the display panel should have, and then Adjusting the backlight module The intensity of the backlight emitted is such that the display brightness of the display panel is substantially the same as the brightness of the target display, and then the adjusted backlight intensity is sensed by the backlight sensor and the color gain compensation value required by the display panel is estimated to be based on the color gain. The compensation value is used to compensate the color of the display panel and display the image.

Therefore, even if the backlight emitted by the backlight module changes, the brightness and chromaticity of the light emitted from the front of the display panel deviate from the color performance consistent with the ambient light, the present invention can adjust the backlight module according to the ambient light information that is sensed immediately. The backlight intensity compensates the color of the display panel according to the adjusted backlight intensity and panel characteristic information, thereby effectively compensating for the color attenuation of the backlight module, so that the brightness and chromaticity of the front side of the display panel maintain the color performance consistent with the ambient light. And people can have a more comfortable feeling when watching the display device.

The features and spirits of the present invention are intended to be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed. The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed.

Claims (10)

A color correction method is applied to a display device. The display device includes a display panel and a backlight module. The color correction method includes the following steps: (a) sensing one of the ambient light information in the environment where the display device is located (b) estimating a target display brightness according to the instant ambient light information; (c) adjusting the backlight intensity of the backlight module to an adjusted backlight intensity such that the display brightness of the display panel is substantially the same as the target display brightness; (d) sensing the adjusted backlight information of the backlight module and estimating a color gain compensation value required by the display panel according to the adjusted backlight information and the real-time ambient light information; and (e) according to the color gain The compensation value compensates for the color of the display panel and displays the image. The color correction method of claim 1, wherein the step (c) further comprises: adjusting the backlight intensity of the backlight module according to a panel brightness characteristic information and the target display brightness, wherein the panel brightness characteristic information corresponds to The penetration characteristics of the display panel. The color correction method of claim 2, wherein the panel brightness characteristic information is generated when the display device is shipped, according to the following steps: (f1) when the backlight module sends a first backlight to the display panel Sensing a first brightness information of the display panel in front of the display panel; (f2) when the backlight module sends a second backlight to the display panel, sensing one of the display panels in front of the display panel a second brightness information, wherein the second backlight is different from the first backlight; and (f3) calculating the panel brightness feature information according to the first backlight, the first brightness information, the second backlight, and the second brightness information; Step (f3) includes: The brightness characteristic information of the panel is calculated according to the interpolation method. The color correction method according to claim 1, wherein the step (d) further comprises: (d1) estimating a restored color gain compensation value according to the adjusted backlight information and a color target information; and (d2) according to the The ambient light information and the restored color gain compensation value estimate the color gain compensation value. The color correction method of claim 4, wherein the color target information is a color preset value of the backlight module, and the restored color gain compensation value is based on the adjusted backlight information and the color target information. The difference is estimated. The color correction method of claim 4, wherein the step (d1) further comprises: when the display device is shipped from the factory, when the backlight module sends a first backlight to the display panel, in front of the display panel Sensing a first color information of the display panel; when the backlight module sends a second backlight to the display panel, sensing a second color information of the display panel in front of the display panel, wherein the second backlight Different from the first backlight; and calculating the color target information according to the first backlight, the first color information, the second backlight, and the second color information. The color correction method of claim 4, wherein the step (d2) further comprises: setting a complex array color temperature section; determining that the instant ambient light information belongs to a first color temperature section of the complex array color temperature section And determining the color increase according to the first color temperature segment and the restored color gain compensation value Benefit compensation value. A display device includes: a display panel; a backlight module for emitting a backlight to the display panel; and a first sensing unit for sensing one of the ambient light information in the environment in which the display device is located; a second sensing unit is disposed on one side of the backlight module; and a processing module is coupled to the display panel, the backlight module, the first sensing unit and the second sensing unit, respectively The module estimates a target display brightness according to the real-time ambient light information and adjusts the backlight intensity of the backlight module to an adjusted backlight intensity, so that the display brightness of the display panel is substantially the same as the target display brightness, and the second sensing The unit senses the adjusted backlight information of the backlight module, and the processing module estimates a color gain compensation value required by the display panel according to the adjusted backlight information and the real-time ambient light information, and according to the color gain compensation value The image is displayed after the color of the display panel is compensated. The display device of claim 8, wherein the processing module adjusts the backlight intensity of the backlight module according to a panel brightness characteristic information and the target display brightness, wherein the panel brightness characteristic information corresponds to the display panel Penetration characteristics. The display device of claim 8, further comprising: a third sensing unit; wherein, when the display device is shipped from the factory, when the backlight module sends a first backlight to the display panel, the The third sensing unit senses a first brightness information sent by the display panel. When the backlight module sends a second backlight to the display panel, the third sensing unit senses a second brightness emitted by the display panel. Information, the processing module is based on the first backlight, the first brightness information, the second backlight, and the second The brightness information calculates the brightness characteristic information of the panel, wherein the second backlight is different from the first backlight, and the processing module calculates the brightness characteristic information of the panel according to the interpolation method.