TWI737530B - Image adjusting method of display appratus and applications thereof - Google Patents

Abstract

An image adjusting method of a display apparatus includes steps as follows: A plurality of preset grayscale-brightness relationship curves are determined corresponding to multiple time periods of a day, respectively. A reference grayscale-brightness relationship curve is selected from the preset grayscale-brightness relationship curves according to an acquisition time of an image data, corresponding to one of the multiple time periods. A real-time ambient light is acquired and it is compared with a reference contrast or a reference ambient light brightness corresponding to the reference grayscale-brightness relationship curve. At least one other grayscale-brightness relationship curve is selected from the preset grayscale-brightness relationship curves according to the comparison result to at least partially replace the reference grayscale-brightness relationship curve for adjusting the image data. The adjusted image data is then displayed.

Description

Image adjustment method of display device and its application

The present invention relates to a method for controlling a display device and its application, and more particularly to a method for adjusting an image of a display device and its application.

With smart phones, tablet computers, notebook computers, personal digital assistants (personal digital assistants, PDAs) and other portable electronic devices (Portable Electronic Devices, PED), or vehicle-mounted electronic devices, such as driving assistance systems (diver information With the increasing popularity of products such as system), global positioning system (GPS), and audio-visual entertainment systems, display devices have become one of the indispensable key components of electronic products.

A typical display device generally uses a fixed brightness range to display an image, and cannot automatically adjust the color temperature value of the image itself. Although the human eye has the function of automatically adjusting the color temperature, in actual operation, the image displayed by the display device will be mixed with the external ambient light to change the vision of the human eye, affecting the human eye’s ability to perceive color, and thus make Allow users to produce visual differences.

In particular, the color temperature value of the ambient light will be different at different times of the day, so when the ambient light at different times is projected into the display, it is easier to make the It is difficult for the user's eyes to adjust, causing the user to have an incorrect perception of the color of the display device. How to enable users to correctly feel the colors displayed by the display device without being affected by external environmental light sources has become an important issue to be solved by those skilled in the art.

Therefore, there is a need to provide an advanced display device image adjustment method and its application to solve the problems faced by the conventional technology.

An embodiment of this specification provides an image adjustment method for a display device, including the following steps: first, for a plurality of time periods of the day, a plurality of preset grayscale-brightness relationship curves are determined, respectively corresponding to the aforementioned plurality of time periods. According to the acquisition time of the image data, corresponding to one of the time periods, a reference gray-level-brightness relationship curve is selected from a plurality of preset gray-level-brightness relationship curves. And obtain the real-time ambient light, and compare it with at least one of the reference contrast and the reference ambient light brightness corresponding to the reference grayscale-brightness relationship curve. Then, according to the comparison result, at least one other grayscale-brightness relationship curve is selected from the plurality of preset grayscale-brightness relationship curves to at least partially replace the reference grayscale-brightness relationship curve to adjust the image data. Display adjusted image data

Another embodiment of this specification provides a display device including: a panel unit, a storage unit, a timer, an ambient light detection unit, and a controller. The storage unit is used to store a plurality of preset grayscale-brightness relationship curves corresponding to a plurality of time periods of the day. The timer is used to obtain the acquisition time of the image data. Ambient light The detection unit is used to obtain real-time ambient light. The controller selects a reference gray level-brightness relationship curve from a plurality of preset gray level-brightness relationship curves according to the acquisition time and corresponds to one of the plurality of time periods; At least one of the reference ambient light brightness is compared with the real-time ambient light, and based on the comparison result, at least one other gray-level-brightness relationship curve is selected from a plurality of preset gray-level-brightness relationship curves to at least partially replace the reference gray-scale -Brightness relationship curve, used to adjust the image data, provided to the panel unit to display the adjusted image data

According to the above-mentioned embodiments, this specification provides an image adjustment method of a display device and its application. The daily time (24 hours) is divided into a plurality of time periods, and a preset grayscale-brightness relationship curve is preset for each time period to adapt to the reference contrast value of human vision and the reference environmental brightness. A reference gray-level-brightness relationship curve is selected according to the time (and the period of time) when the image data is acquired by the display device. And compare the real-time measured value of the real-time ambient light obtained in real time with the reference contrast and the reference ambient light brightness corresponding to the selected reference grayscale-brightness relationship curve. Then, according to the comparison result, select one of the other preset grayscale-brightness relationship curves to at least partially replace the original reference grayscale-brightness relationship curve to adjust the image data, and then the display device responds to the adjusted image The data shows the corresponding image. In this way, the adverse effects of real-time ambient light on the vision of human eyes can be neutralized, so that the user can correctly feel the color to be displayed in the original image data.

In order to have a better understanding of the above and other aspects of this specification, the following specific examples are given in conjunction with the accompanying drawings to describe in detail as follows:

10: Display device

101: Panel unit

102: storage unit

103: Timer

104: Ambient light detection unit

105: Controller

B1, B2, B3, B4, B5: preset grayscale-brightness relationship curve

B11, B21, B31, B41, B51: the first interval curve

B12, B22, B32, B42, B52: second interval curve

BC1, BC2, BC3, BC4: grayscale-brightness relationship correction curve

S1: Determine a plurality of preset grayscale-brightness relationship curves for a plurality of periods of the day, respectively corresponding to the foregoing plurality of periods

S2: According to the acquisition time of the image data, corresponding to one of the time periods, one of a plurality of preset grayscale-brightness relationship curves is selected as the reference grayscale-brightness relationship curve

S3: Acquire real-time ambient light data and compare it with at least one of the reference contrast corresponding to the reference grayscale-brightness relationship curve and the reference ambient light brightness

S4: According to the comparison result, select at least one other grayscale-brightness relationship curve from a plurality of preset grayscale-brightness relationship curves to at least partially replace the reference grayscale-brightness relationship curve to adjust the image data

S5: Display the adjusted image data

Fig. 1A is a system block diagram of a display device according to an embodiment of this specification; Fig. 1B is an operation flowchart of an image adjustment method of a display device; Fig. 2 is an implementation according to this specification The example shows a plurality of preset grayscale-brightness relationship graphs corresponding to different time periods; Figure 3A is a grayscale-brightness relationship correction curve drawn according to an embodiment of this specification; Figure 3B is based on this The grayscale-brightness relationship correction curve drawn in another embodiment of the specification; Figure 4A is a grayscale-brightness relationship correction curve drawn according to another embodiment of the specification; and Figure 4B is based on the specification The gray scale-brightness relationship correction curve drawn in yet another embodiment.

This manual provides an image adjustment method and application for a display device, which allows users to feel the colors displayed by the display device without being affected by external ambient light sources. In order to make the above-mentioned embodiments and other purposes, features, and advantages of the specification more obvious and understandable, a plurality of preferred embodiments are specifically described below in conjunction with the accompanying drawings.

However, it must be noted that these specific implementation cases and methods are not intended to limit the present invention. The present invention can still be implemented using other features, elements, methods, and parameters. The preferred embodiments are only used to illustrate the technical features of the present invention, and not to limit the scope of the patent application of the present invention. Those with ordinary knowledge in this technical field will be able to make equivalent modifications and changes based on the description of the following specification without departing from the spirit of the present invention. In different embodiments and drawings, the same elements will be represented by the same element symbols.

Please refer to FIG. 1A and FIG. 1B. FIG. 1A is a system block diagram of a display device 10 according to an embodiment of the present specification. FIG. 1B is an operation flowchart of the image adjustment method of the display device 10. The display device 10 includes a panel unit 101, a storage unit 102, a timer 103, an ambient light detection unit 104, and a controller 105.

In some embodiments of this specification, the display device 10 may be (but not limited to) a built-in display panel of a portable electronic device such as a smart phone, a tablet computer, a notebook computer, a personal digital assistant, etc.; or Car electronic devices (such as driving assistance systems, global positioning systems, audio-visual entertainment systems) or aircraft built-in display panels; or fixed or movable indoor or outdoor large signage display panels. The panel unit 101 may be (but not limited to) one of a liquid crystal display panel (Liquid Crystal Display, LCD), an electronic paper display panel (Electronic Paper Display, EPD), or an electronic ink (E-Ink) display panel. It displays images in response to the image data provided by the controller 105.

In some embodiments of this specification, the controller 105 may include (but is not limited to) a central processing unit (programmable central processing unit, CPU) built in the display device 10, and may be combined with the storage unit 102, the timer 103, and The ambient light detection unit 104 is electrically coupled. The controller 105 can also be (but is not limited to) one of the general purpose computer processors (general purpose computer processors) in any form used in industrial equipment, such as a programmable logic controller (PLC), whereby Various components in the display device 10 are controlled.

The timer 103 is connected to the controller 105 and the storage unit 102, and includes clock circuits, which is used to obtain the time data of the original image data obtained by the controller 105. The ambient light detection unit 104 includes (but is not limited to) at least one photoelectric conversion element, such as a photodiode, a charge-coupled device (CCD), or an enhanced charge-coupled device (ICCD, Intensified CCD). ), can be used to capture real-time ambient light brightness, wavelength and other optical data.

The storage unit 102 is built in the display device 10, and is electrically connected to the controller 105, the timer 103, and the ambient light detection unit 104, respectively, for storing the time data sensed or acquired by the timer 103 and the ambient light detection unit 104 And/or optical data, and used to store preset parameters, commands, original image data or image data adjusted by the controller 105 of the electric display device 10. In some embodiments of the present specification, the storage unit 102 may be a computer-readable storage media (computer-readable storage media), which may include (but is not limited to): (i) non-writable storage media for storing permanent data ( non-writable storage media) (such as a read-only memory component built into a computer, such as a disk drive (CD-ROM) read-only memory disc, flash memory, read-only memory chip or any type of solid non-volatile semiconductor memory; (ii) writable storage medium that stores variable data, such as Floppy disk driver or hard disk driver (hard disk driver) or any type of solid-state random-access semiconductor memory.

The image adjustment method of the display device 10 includes the following steps: first, for a plurality of time periods of the day, a plurality of preset grayscale-brightness relationship curves are determined, respectively corresponding to the plurality of time periods (as shown in step S1 in Fig. 1A) . In some embodiments of this specification, the time of day (24 hours) can be changed according to the change in the color temperature of the external ambient light, the user’s habits or other factors that may affect the user’s visual perception. ) Is divided into a plurality of time periods.

For example, in this embodiment, it is possible to obtain general ambient light information at different time points of the day based on the accumulated historical data of long-term observation, and according to the influence of general ambient light on the color temperature change of the panel unit 101, the 24 hours a day can be divided into 8:00 am to 4:00 pm (8:00am~4:00pm), 4:00 pm to 6:00 pm (4:00pm~6:00pm), 6:00 pm to 8:00 pm (6:00pm~8:00pm) , 8pm to 11pm (8:00pm~11:00pm) and 11pm to 8am (11:00pm~8:00am) 5 time slots.

As shown in Table 1, and according to the human eye’s ability to perceive colors, the panel unit 101 is preset to be the most (more) suitable for the general reference ambient light brightness (unit: lux) and the best (preferably) human eyes during these periods of time. ) Benchmark comparison value (%). And for each time period, select a reference contrast value (%) that can achieve the above-mentioned best under the reference ambient light brightness, so that the user can correctly feel the preset color displayed by the panel unit 101 of the display device 10 Grayscale-brightness relationship curve, for example Such as B1, B2, B3, B4 or B5. And these preset data are stored in the storage unit 102.

For example, in this embodiment, the brightness of the darkest point (grayscale value of 0) of the grayscale-brightness relationship curve B1 is preset to 0.3; the brightness of the brightest point (grayscale value of 255) is 300; the most suitable reference contrast The value is 100%; the reference ambient light brightness is 250. The brightness of the darkest point (grayscale value of 0) of the preset grayscale-brightness relationship curve B2 is 0.29; the brightness of the brightest point (grayscale value of 255) is 250; the most suitable reference contrast value is 85%; the reference ambient light The brightness is 200. The brightness of the darkest point (grayscale value of 0) of the preset grayscale-brightness relationship curve B3 is 0.26; the brightness of the brightest point (grayscale value of 255) is 200; the most suitable reference contrast value is 75%; the reference ambient light The brightness is 150. The brightness of the darkest point (grayscale value of 0) of the preset grayscale-brightness relationship curve B4 is 0.23; the brightness of the brightest point (grayscale value of 255) is 150; the most suitable reference contrast value is 65%; the reference ambient light The brightness is 50. The brightness of the darkest point (grayscale value of 0) of the preset grayscale-brightness relationship curve B5 is 0.18; the brightness of the brightest point (grayscale value of 255) is 100; the most suitable reference contrast value is 55%; the reference ambient light The brightness is 20.

Please refer to FIG. 2. FIG. 2 is a graph showing a plurality of preset grayscale-brightness relationship curves corresponding to different time periods according to an embodiment of the present specification. Among them, each preset grayscale-brightness relationship curve B1, B2, B3, B4, or B5 can be divided into at least the first interval curve (B11, B21, B31, B411 or B51) and the second interval curve (B12, B22, B32, B412 or B52); wherein the gray scale value of the first interval curve (0 to 128) is greater than the gray scale value of the second interval curve (128 to 256 ).

Then, according to the acquisition time of the image data, corresponding to one of the time periods, one of the plurality of preset grayscale-brightness relationship curves is selected as the reference grayscale-brightness relationship curve (as shown in step S2 in FIG. 1A). For example, in some embodiments of this specification, when the original image data is transmitted to the controller 105, the corresponding time obtained by the clock circuits of the timer 103 is 9:30 in the morning, and according to the time corresponding to The time period is from 8 am to 4 pm (8:00am~4:00pm). That is to say, the corresponding preset grayscale-brightness relationship curve B1 can be selected from the preset grayscale-brightness relationship curves B1, B2, B3, B4, and B5 as the reference grayscale-brightness relationship curve (hereinafter referred to as the reference grayscale-brightness relationship Curve B1).

While receiving the original image data, the ambient light detection unit 104 detects the real-time ambient light L to obtain real-time ambient light data; and the controller 105 sends the acquired real-time ambient light information and the corresponding reference gray At least one of the reference contrast (for example, 100%) and the reference ambient light brightness (250) of the level-brightness relationship curve B1 is compared (as shown in step S3 in FIG. 1A).

After that, the controller 105 selects at least one other grayscale-brightness relationship (not the reference grayscale-brightness relationship curve B1) from a plurality of preset grayscale-brightness relationship curves B2, B3, B4, and B5 according to the comparison result Curve, at least part of The ground replaces the reference grayscale-brightness relationship curve B1 for adjusting the image data (as shown in step S4 in Figure 1A).

In some embodiments of this specification, it is mainly to compare the actual brightness value of the real-time ambient light L with the reference ambient light brightness corresponding to the reference grayscale-brightness relationship curve B1 to determine which preset grayscale-brightness to choose. The relationship curves B2, B3, B4, and B5 are used as other grayscale-brightness relationship curves to at least partially replace the reference grayscale-brightness relationship curve B1.

For example, in this embodiment, the reference ambient light brightness corresponding to the reference grayscale-brightness relationship curve B1 is 250, and the real-time ambient light L brightness detected by the ambient light detecting unit 104 is 150, which is smaller than the reference environment The brightness is 250. Among the other preset grayscale-brightness relationship curves B2, B3, B4, and B5 listed in Table 1, the reference ambient light brightness of the preset grayscale-brightness relationship curve B3 is 150, which is closest to the brightness of the real-time ambient light L The measured value is 150. Therefore, the preset grayscale-brightness relationship curve B3 can be selected as other grayscale-brightness relationship curves (hereinafter referred to as other grayscale-brightness relationship curves B3) to completely or partially replace the reference grayscale-brightness relationship curve B1 .

The method of using other preset grayscale-brightness relationship curve B3 to replace the reference grayscale-brightness relationship curve B1 includes the following schemes: for example, the first interval curve of other preset grayscale-brightness relationship curve B3 can be selected B31 replaces the first interval curve B11 of the reference grayscale-brightness relationship curve B1 to form a grayscale-brightness relationship correction curve BC1 composed of the first interval curve B31 and the second interval curve B12 (as shown in Figure 3A Illustrated). Alternatively, the second interval curve B32 of another preset grayscale-brightness relationship curve B3 can also be selected to replace the second interval curve B12 of the reference grayscale-brightness relationship curve B1 to form a first interval curve B11 The grayscale-brightness relationship correction curve BC2 (as shown in FIG. 3B) formed by the second interval curve B32. Or, replace the reference grayscale-brightness relationship curve B1 with another grayscale-brightness relationship curve B3.

Because the grayscale value of the first interval curve B31 of the other grayscale-brightness relationship curve B3 is greater than the grayscale value of the first interval curve B11 in the reference grayscale-brightness relationship curve B1; the other grayscale-brightness relationship curve B3 The grayscale value of the second interval curve B32 is smaller than the grayscale value of the second interval curve B12 of the reference grayscale-brightness relationship curve B1. Therefore, when the actual brightness value of the real-time ambient light L (the actual value is 150) is less than the reference ambient light brightness (250), it is better to use the grayscale value of the second interval curve B32 of the other grayscale-brightness relationship curve B3, To replace the second curve B12 of the reference grayscale-brightness relationship curve B1 (as shown in Figure 3B), it is easier to match the grayscale-brightness relationship correction curve BC2 with the real-time ambient light L, thereby neutralizing the real-time ambient light The adverse effect of L allows the user to correctly feel the color to be displayed in the original image data.

In another embodiment, when the original image data is transmitted to the controller 105, the time obtained by the clock circuit of the timer 103 is 6:30 pm, and the time period corresponding to the time is 6 pm to 8 pm ( 6:00pm~8:00pm). Therefore, the corresponding preset grayscale-brightness relationship curve B3 can be selected from the preset grayscale-brightness relationship curves B1, B2, B3, B4, and B5 as the reference grayscale-brightness relationship curve (hereinafter referred to as the reference grayscale-brightness relationship Curve B3).

Wherein, the reference ambient light brightness corresponding to the reference grayscale-brightness relationship curve B3 is 150. The actual measured value of the real-time ambient light L brightness detected by the ambient light detecting unit 104 is 175, which is greater than the reference ambient light brightness of 150. Among the other preset grayscale-brightness relationship curves B1, B2, B4, and B5 listed in Table 1, the preset grayscale -The reference ambient light brightness of the brightness relationship curve B2 is 200, which is closest to the actual measured brightness value of the real-time ambient light L of 175. Therefore, the preset grayscale-brightness relationship curve B2 can be selected as another grayscale-brightness relationship curve (hereinafter referred to as other grayscale-brightness relationship curve B2) to completely or partially replace the reference grayscale-brightness relationship curve B3 .

The method of using other preset grayscale-brightness relationship curve B2 to replace the reference grayscale-brightness relationship curve B3 includes the following schemes: for example, the first interval of other preset grayscale-brightness relationship curve B2 can be selected Curve B21 replaces the first interval curve B31 of the reference grayscale-brightness relationship curve B3 to form a grayscale-brightness relationship correction curve BC3 composed of the first interval curve B21 and the second interval curve B32 (as shown in Figure 4A Shown). Alternatively, the second interval curve B22 of another preset grayscale-brightness relationship curve B2 can be selected to replace the second interval curve B32 of the reference grayscale-brightness relationship curve B3 to form a curve consisting of the first interval curve B31 and the second interval The grayscale-brightness relationship correction curve BC4 formed by the curve B22 (as shown in FIG. 4B). Or, another grayscale-brightness relationship curve B2 can completely replace the reference grayscale-brightness relationship curve B3.

Because the grayscale value of the first interval curve B21 of the other grayscale-brightness relationship curve B2 is smaller than the grayscale value of the first interval curve B31 in the reference grayscale-brightness relationship curve B3; the other grayscale-brightness relationship curve B2 The grayscale value of the second interval curve B22 is greater than the grayscale value of the second interval curve B32 of the reference grayscale-brightness relationship curve B3. Therefore, when the actual brightness value of the real-time ambient light L (the actual value is 175) is greater than the reference ambient light brightness (150), it is better to use the grayscale value of the second interval curve B22 of the other grayscale-brightness relationship curve B2. The second curve B32 (as shown in Figure 4B), which replaces the reference grayscale-brightness relationship curve B3, makes it easier to match the grayscale-brightness relationship correction curve BC4 with the real-time ambient light L, thereby neutralizing the real-time environment The adverse effect of light L allows the user to correctly feel the color to be displayed in the original image data.

However, the correction and replacement method of the reference grayscale-brightness relationship curve B3 is not limited to this. For example, in some embodiments of this specification, when the actual brightness value of the real-time ambient light L is not much different from the reference ambient light brightness, the first interval of another grayscale-brightness relationship curve B2 can be selected based on the consideration of image contrast. The gray scale value of the curve B12 replaces the first curve B31 of the reference gray scale-brightness relationship curve B3 (as shown in FIG. 4A).

Subsequently, the controller 105 provides the adjusted image data to the panel unit 101 to display the corresponding image (as shown in step S5 in FIG. 1A).

According to the above-mentioned embodiments, this specification provides an image adjustment method of a display device and its application. The daily time (24 hours) is divided into a plurality of time periods, and a preset grayscale-brightness relationship curve is preset for each time period to adapt to the reference contrast value of human vision and the reference environmental brightness. A reference gray-level-brightness relationship curve is selected according to the time (and the period of time) when the image data is acquired by the display device. And compare the real-time measured value of the real-time ambient light obtained in real time with the reference contrast and the reference ambient light brightness corresponding to the selected reference grayscale-brightness relationship curve. Then, according to the comparison result, select one of the other preset grayscale-brightness relationship curves to at least partially replace the original reference grayscale-brightness relationship curve to adjust the image data, and then the display device responds to the adjusted image The data shows the corresponding image. In this way, the adverse effects of real-time ambient light on the vision of human eyes can be neutralized, so that the user can correctly feel the color to be displayed in the original image data.

Although the present invention has been disclosed as above in preferred embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field will not depart from the present invention. Within the spirit and scope of the invention, some changes and modifications can be made. Therefore, the scope of protection of the invention shall be subject to the scope of the attached patent application.

S1: Determine a plurality of preset grayscale-brightness relationship curves for a plurality of periods of the day, respectively corresponding to the foregoing plurality of periods

S2: According to the acquisition time of the image data, corresponding to one of the time periods, one of a plurality of preset grayscale-brightness relationship curves is selected as the reference grayscale-brightness relationship curve

S3: Acquire real-time ambient light data and compare it with at least one of the reference contrast corresponding to the reference grayscale-brightness relationship curve and the reference ambient light brightness

S4: According to the comparison result, select at least one other grayscale-brightness relationship curve from a plurality of preset grayscale-brightness relationship curves to at least partially replace the reference grayscale-brightness relationship curve to adjust the image data

S5: Display the adjusted image data

Claims (10)

An image adjustment method of a display device includes: determining a plurality of preset grayscale-brightness relationship curves for a plurality of time periods of the day, respectively corresponding to the plurality of time periods; according to an acquisition time of an image data, corresponding to the plurality of time periods Select a reference gray-level-brightness relationship curve from the plurality of preset gray-level-brightness relationship curves; obtain a real-time ambient light and compare it with the one corresponding to the reference gray-level-brightness relationship curve. At least one of the reference contrast and a reference ambient light brightness is compared; according to the comparison result, at least one other gray-level-brightness relationship curve is selected from the plurality of preset gray-level-brightness relationship curves to at least partially replace the reference The gray scale-brightness relationship curve is used to adjust the image data; and to display the adjusted image data. The image adjustment method of the display device according to claim 1, wherein the step of adjusting the image data includes: dividing the reference gray-level-brightness relationship curve into at least a first interval curve and a second interval curve, wherein the The gray scale value of the first interval curve is smaller than the gray scale value of the second interval curve; the at least one other preset gray scale-brightness relationship curve is at least divided into a third interval curve and a fourth interval curve, respectively Should be the first interval curve and the second interval curve; The three interval curve replaces the first area curve, or the fourth interval curve replaces the second interval curve, or the at least one other grayscale-brightness relationship curve replaces the reference grayscale-brightness relationship curve. The image adjustment method of the display device according to claim 2, wherein when a brightness of the real-time ambient light is greater than the reference ambient light brightness, the gray scale value of the third interval curve is smaller than the gray scale value of the first interval curve , And the gray scale value of the fourth interval curve is greater than the gray scale value of the second interval curve. The image adjustment method of the display device according to claim 2, wherein when a brightness of the real-time ambient light is less than the reference ambient light brightness, the gray scale value of the third interval curve is greater than the gray scale value of the first interval curve , And the gray scale value of the fourth interval curve is smaller than the gray scale value of the second interval curve. A display device includes: a storage unit for storing a plurality of preset grayscale-brightness relationship curves corresponding to a plurality of periods of the day; a timer for obtaining an acquisition time of an image data; an environment The light detection unit is used to acquire a real-time ambient light; and a controller, according to the acquisition time, corresponds to one of a plurality of time periods, and selects a reference from the plurality of preset gray scale-brightness relationship curves Grayscale-brightness relationship curve; and compare at least one of a reference contrast between the real-time ambient light and the reference grayscale-brightness relationship curve and the reference ambient light brightness Compare; According to the comparison result, select at least one other grayscale-brightness relationship curve from the plurality of preset grayscale-brightness relationship curves to at least partially replace the reference grayscale-brightness relationship curve for adjusting the image data ; And a panel unit for displaying the adjusted image data. The display device according to claim 5, wherein the step of adjusting the image data includes: dividing the reference grayscale-brightness relationship curve into at least a first interval curve and a second interval curve, wherein the first interval curve The grayscale value of is greater than the grayscale value of the second interval curve; the at least one other preset grayscale-brightness relationship curve is at least divided into a third interval curve and a fourth interval curve, respectively corresponding to the first interval Curve and the second interval curve; and the three interval curve replaces the first area curve; or the fourth interval curve replaces the second interval curve; or the at least one other grayscale-brightness relationship curve replaces the reference Grayscale-brightness relationship curve. The display device according to claim 6, wherein when a brightness of the real-time ambient light is greater than the reference ambient light brightness, the gray scale value of the third interval curve is smaller than the gray scale value of the first interval curve, and the first interval curve The gray scale value of the four interval curve is greater than the gray scale value of the second interval curve. The display device according to claim 6, wherein when a brightness of the real-time ambient light is less than the reference ambient light brightness, the gray scale value of the third interval curve is greater than the gray scale value of the first interval curve, and the first interval curve The gray scale value of the four interval curve is smaller than the gray scale value of the second interval curve. The display device according to claim 5, wherein the panel unit is a liquid crystal display (Liquid Crystal Display, LCD), an electronic paper display (Electronic Paper Display, EPD) or an electronic ink (E-Ink) display panel . The display device according to claim 5, wherein the ambient light detection unit 1 includes a photodiode, a charge-coupled device (CCD), or an enhanced charge-coupled device (ICCD). , Intensified CCD).

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