TWI823681B - Display device and image display method - Google Patents

Abstract

An image display method, comprising: driving a display panel, wherein the display panel comprises a first main flickering area, a second main flickering area and a background flickering area, the background flickering area comprises a plurality of first sub-flickering areas and a plurality of second sub-flickering areas, and an area of any one of the first sub-flickering areas and the second sub-flickering areas is smaller than an area of the first main flickering area and the second main flickering area; and changing brightness of the first main flickering area, the second main flickering area and the background flickering area periodically according to a plurality of gamma values, wherein in the same period, the first main flickering area and the first sub-flickering areas correspond to a same one of the gamma values, and the second main flickering area and the second sub-flickering areas correspond to another same one of the gamma values.

Description

Display device and image display method

The present disclosure relates to a technology for presenting image images based on image signals, and in particular, to a display device and an image display method.

With the rapid development of electronic technology, display devices have been widely used in people's lives, such as smart phones or computers. The display device will separately control the brightness of each pixel on the display panel in different frames to present the corresponding image.

According to research by scholars, when light flashes at a specific frequency, it will stimulate the gamma brain waves of Alzheimer's patients (rats were used in the study), reduce amyloid beta in the brain, and improve the function of microglia. In other words, flashing light effectively improves cognitive performance in mice with Alzheimer's disease. However, if the display device is flashed at a specific frequency, it will cause discomfort to the user when viewing images, making this technology unable to be used on display devices.

The present disclosure relates to an image display method, which includes the following steps: driving a display panel, wherein the display panel includes a first main flickering area, a second main flickering area and a background flickering area. The background flickering area includes a plurality of first sub-flashing areas and A plurality of second sub-flash areas, and the area of any one of the first sub-flash areas and the second sub-flash areas is smaller than the area of the first main scintillation area and the area of the second main scintillation area; and according to the plurality gamma values, regularly changing the brightness of the first main flickering area, the second main flickering area and the background flickering area, wherein during the same period, the first main flickering area and the first sub-flickering areas correspond to the gamma values. One of the gamma values is the same, and the second main flicker area and the second sub-flicker areas correspond to another one of the gamma values that is the same.

The present disclosure also relates to a display device, including a display panel and a processor. The display panel includes a plurality of pixel circuits to present a display image. The display screen includes a first main flashing area, a second main flashing area and a background flashing area. The background scintillation area includes a plurality of first sub-flash areas and a plurality of second sub-flash areas, and the area of any one of the first sub-flash areas and the second sub-flash areas is smaller than the area of the first main scintillation area. and the area of the second main scintillation area. The processor is coupled to the display panel and used to regularly change the brightness of the first main flickering area, the second main flickering area and the background flickering area according to a plurality of gamma values. In the same period, the first main flicker area and the first sub-flicker area correspond to the same one of the gamma values, and the second main flicker area and the second sub-flicker area correspond to the same one of the gamma values. Another identical one.

Accordingly, since the display device adjusts the brightness of different areas in the display screen by changing the gamma value, it does not cause excessive computing load on the hardware. In addition, by dividing the background flickering area into multiple staggered sub-flickering areas, the screen burn-in problem on the display panel will be avoided.

A plurality of embodiments of the present invention will be disclosed in the drawings below. For clarity of explanation, many practical details will be explained in the following description. However, it will be understood that these practical details should not limit the invention. That is to say, in some embodiments of the present invention, these practical details are not necessary. In addition, for the sake of simplifying the drawings, some commonly used structures and components will be illustrated in a simple schematic manner in the drawings.

In this document, when an element is referred to as "connected" or "coupled," it may mean "electrically connected" or "electrically coupled." "Connection" or "coupling" can also be used to indicate the coordinated operation or interaction between two or more components. In addition, although terms such as "first", "second", ... are used to describe different elements herein, the terms are only used to distinguish elements or operations described by the same technical terms. Unless the context clearly indicates otherwise, such terms do not specifically refer to or imply a sequence or order, nor are they intended to limit the invention.

FIG. 1 is a schematic diagram of a display device 100 according to some embodiments of the present disclosure. The display device 100 includes a display panel 110 and a processor 120 . The display panel 110 is coupled to the processor 120 for receiving control signals from the processor 120 . The display panel 110 is provided with a plurality of pixel circuits P. Each pixel circuit P is used to drive an internal light-emitting element (such as a light-emitting diode, an organic light-emitting diode) according to a control signal to display on the display panel 110 to exit the image screen.

Figure 2 shows a schematic diagram of the display panel 110 and the image displayed thereon. When the display panel 110 is driven by the processor 120, the pixel circuit P will generate different lights or colors according to the control signal to form an image. The image screen includes multiple areas: a first main flashing area AM1, a second main flashing area AM2 and a background flashing area AB. In other words, each area is formed by the light generated by the pixel circuit P corresponding to the area on the display panel 110 .

In one embodiment, the outlines of the first main flashing area AM1 and the second main flashing area AM2 are triangular, and the remaining areas are the background flashing areas AB, and the background flashing areas AB can also be subdivided into a plurality of first sub-flashing areas. area AB1 and a plurality of second sub-flash areas AB2. The outlines of the first sub-blinking areas AB1 and the second sub-blinking areas AB2 are rectangular or polygonal, and are arranged staggered with each other.

The area of any one of the first main scintillation area AM1 and the second main scintillation area AM2 is larger than the area of any one of the first sub-flash area AB1 and the second sub-flash area AB2. However, the outlines of the first main scintillation area AM1, the second main scintillation area AM2, the first sub-flash area AB1 and the second sub-flash area AB2 are not limited and can be rectangular, triangular, circular or polygonal, and their positions can also be Adjust as desired.

The processor 120 is used to provide control signals to drive the display panel 110 . In one embodiment, the processor 120 receives an image signal from a terminal device (such as a computer, an audio-visual network), and generates a corresponding control signal (such as a driving voltage) according to the brightness of the image to be presented in the image signal. In one embodiment, the processor 120 may be implemented as a microcontroller, a microprocessor, a digital signal processor, or an application specific integrated circuit (ASIC). or logic circuit. In some embodiments, the processor 120 may be integrated into the timing controller (TCON) of the display device 100 .

A plurality of gamma values (Gamma) are set in the processor 120 . The gamma value is a parameter in the relative relationship between the input signal and the output signal in the display device. It is used to define "the degree of change in the brightness and darkness of the image" in the digital display device. The gamma value determines the change curve from "black (grayscale value 0) to white (grayscale value 255)" in a digital image. The processor 120 will generate a corresponding control signal (such as a driving voltage) according to the image signal and the set gamma value. Therefore, when the display device is set to different gamma values, the magnitude of the control signal (such as the driving voltage) corresponding to the same grayscale command is also different, and the actual brightness displayed will also be different.

The processor 120 regularly changes the brightness of the first main flickering area AM1, the second main flickering area AM2 and the background flickering area AB according to multiple gamma values. During the same period, the first main flicker area AM1 and the first sub-flicker area AB1 will correspond to the same gamma value, and the second main flicker area AM2 and the second sub-flicker area AB2 will correspond to another gamma value. In Figure 2, the gray blocks (i.e., the first main flickering area AM1 and the first sub-flickering area AB1) represent the same gamma value; the white blocks (i.e., the second main flickering area AM2 and the second sub-flickering area AB1) represent the same gamma value; The flicker area AB2) corresponds to the same other gamma value.

The processor 120 changes the gamma value according to a preset frequency so that the displayed image can exhibit a regular flickering effect. The processor 120 changes the gamma value according to the update frequency of the display panel 110 to adjust the brightness of each area. Therefore, the brightness of each area in the displayed image will change periodically. The frequency of this change is between 30 and 50 Hz, and in some embodiments can be 40 Hz, which can be used to stimulate the gamma brain waves of Alzheimer's disease patients.

This disclosure divides the display screen in the display panel 110 into multiple areas. The areas of the first main flashing area AM1 and the second main flashing area AM2 are much larger than the first sub-blinking area AB1 and the second sub-blinking area AB2, and the first sub-blinking areas AB1 and the second sub-blinking areas AB2 are arranged in a staggered manner. Accordingly, since the display device 100 uses "changing the gamma value" to generate the flicker effect, the original image signal does not need to perform additional calculations for the "flicker" effect, thereby avoiding excessive computational load on the hardware. In addition, the staggered arrangement of multiple sub-flash areas in the background flicker area AB will prevent the display panel 110 from causing screen sticking (image sticking) and prevent the user's eyes from feeling uncomfortable due to the flickering light.

As shown in FIG. 2 , in some embodiments, the first main flashing area AM1 and the second main flashing area AM2 have the same outline and are located on the same horizontal line. In addition, the area ratio of the first main flashing area AM1 (or the second main flashing area AM2) to the area of the first sub-blinking area AB1 (or the second sub-blinking area AB2) is greater than 500. In some other embodiments, the ratio of the area of the first main flashing area AM1 (or the second main flashing area AM2) to the area of the first sub-blinking area AB1 (or the second sub-blinking area AB2) is greater than 1000, but less than 150000. . In other embodiments, the area ratio of the first main scintillation area AM1 (or the second main scintillation area AM2) to the area of the first sub-flash area AB1 (or the second sub-flash area AB2) is between 1600 and 129600.

Figure 3 shows a step flow chart of the image display method according to the present disclosure, which is described below together with Figures 2, 3 and 4A-4C. In step S301, the processor 120 receives the image signal to generate a control signal according to the image signal. In some embodiments, the image signal includes a grayscale command for each pixel circuit, and the control signal is a driving voltage corresponding to the grayscale command.

As mentioned above, the display panel 110 is divided into a first main flashing area AM1, a second main flashing area AM2, and a background flashing area AB (including the first sub-flash area AB1 and the second sub-flashing area AB2). The first main scintillation area AM1 and the first sub-flash area AB1 correspond to the same gamma value and change periodically. The second main scintillation area AM2 corresponds to another gamma value and changes periodically. Therefore, the processor 120 operates on the image signal according to different gamma values to generate a control signal corresponding to each pixel circuit P.

In subsequent steps S302 to S303, the processor 120 regularly changes the brightness of each area according to multiple gamma values to produce a flicker effect. Figure 4A shows a schematic diagram of the calibration curves of multiple gamma values G0 to G2. The vertical axis is the size of the gamma value, and the horizontal axis is time. The preset gamma value G0 is a gamma value commonly used in general display devices (for example: 2.2). The first gamma value G1 is greater than the preset gamma value G0, and the second gamma value G2 is less than the preset gamma value G0. FIG. 4B shows a time diagram of changes in the gamma value of the pixel circuit P corresponding to the first main flicker area AM1. The changing timing of the first sub-flash area AB1 will be the same as that in Figure 4B. FIG. 4C shows a time diagram of changes in the gamma value of the pixel circuit P corresponding to the second main flicker area AM2. The changing timing of the second sub-flash area AB2 will be the same as that in Figure 4C.

For the same grayscale value, the processor 120 drives the pixel circuit according to the first gamma value G1, so its actual brightness will be greater than the actual brightness corresponding to the preset gamma value. In contrast, the processor 120 drives the pixel circuit according to the second gamma value G2, so its actual brightness will be smaller than the actual brightness corresponding to the preset gamma value.

Specifically, in step S302, in the first period F1 of a change period Fd, the processor 120 controls the brightness of the first main flicker area AM1 and the first sub-flicker area AB1 according to the first gamma value G1. The processor 120 also controls the brightness of the second main flicker area AM2 and the second sub-flicker area AB2 according to the second gamma value G2.

In step S303, during the second period of a change period Fd, the processor 120 changes the gamma value corresponding to the first main scintillation area AM1 and the first sub-flash area AB1 (for example: changing from the first gamma value G1 is the second gamma value G2), and the gamma values of the second main scintillation area AM2 and the second sub-flash area AB2 are changed (for example: from the second gamma value G2 to the first gamma value G1), so that The display panel 110 exhibits a periodic flashing effect, and the flashing areas of the background flashing areas AB are staggered.

In this embodiment, the processor 120 sequentially switches the gamma values of different areas between the first gamma value G1 and the second gamma value G2. In other words, during the second period F2, the processor 120 controls the brightness of the first main flicker area AM1 and the first sub-flicker area AB1 according to the second gamma value G2. The processor 120 also controls the brightness of the second main flicker area AM2 and the second sub-flicker area AB2 according to the first gamma value G1. In this embodiment, the update frequency of the display panel 110 is 80 Hz. In other words, the processor 120 changes the gamma corresponding to different areas every 1/80 seconds (ie, the length of the first period F1 and the second period F2). value, and every 1/40 second is a change period of brightness Fd. Therefore, the flashing frequency of the display panel 110 is 40 Hz.

The technology of the present disclosure is not limited to the aforementioned embodiments. Figures 5A and 5B are time graphs of gamma value changes in other embodiments of the present disclosure. FIG. 5A shows a time diagram of changes in the gamma value of the pixel circuit P corresponding to the first main flicker area AM1. The changing timing of the first sub-flash area AB1 will be the same as that in Figure 5A. FIG. 5B shows a time diagram of changes in the gamma value of the pixel circuit P corresponding to the second main flicker area AM2. The changing timing of the second sub-flash area AB2 will be the same as that in Figure 5B.

In one embodiment, the change period Fd also includes a third period F3. In the third period F3 after the second period F2, the processor 120 sets the gamma values of all areas to the same gamma value (for example, they are all the second gamma value G2), and controls the control according to the gamma value. Brightness of all areas. In this embodiment, the update frequency of the display panel 110 is 120 Hz. In other words, the processor 120 changes the update frequency every 1/120 seconds (ie, the time length of the first period F1, the second period F2, and the third period F3). The gamma value corresponding to the area. Since the gamma value changes every three periods as a cycle, the flickering frequency of the display panel 110 is still 40 Hz.

As mentioned in the previous embodiments, in some embodiments, the update frequency of the display panel 110 is an integer multiple of the brightness (flicker) change frequency. For example: when the update frequency of the display panel 110 is 80 Hz, the brightness (flicker) change frequency is 40 Hz and is divided into two periods. Similarly, when the update frequency of the display panel 110 is 120 Hz, the brightness (flicker) change frequency is 40 Hz and is divided into three periods.

FIG. 6A shows a schematic diagram of calibration curves of multiple gamma values according to other embodiments of the present disclosure, corresponding to the display panel 110 shown in FIG. 2 . FIG. 6B shows a time diagram of changes in the gamma value of the pixel circuit P corresponding to the first main flicker area AM1. The changing timing of the first sub-flash area AB1 will be the same as that in Figure 6B. FIG. 6C shows a time diagram of changes in the gamma value of the pixel circuit P corresponding to the second main flicker area AM2. The changing timing of the second sub-flash area AB2 will be the same as that in Figure 6C. As shown in FIG. 6A , the processor 120 adjusts the brightness of each area on the display panel 110 according to three gamma values G1, G2, and G3.

In the first period F1 of the change period Fd, the processor 120 controls the brightness of the first main flicker area AM1 and the first sub-flicker area AB1 according to the first gamma value G1. The processor 120 also controls the brightness of the second main flicker area AM2 and the second sub-flicker area AB2 according to the second gamma value G2.

In the second period F2 of the change period Fd, the processor 120 controls the brightness of the first main flicker area AM1 and the first sub-flicker area AB1 according to the second gamma value G2. The processor 120 also controls the brightness of the second main flicker area AM2 and the second sub-flicker area AB2 according to the first gamma value G1.

In the third period F3 of the change period Fd, the processor 120 controls the brightness of the first main flicker area AM1 and the first sub-flicker area AB1 according to the third gamma value G3. The processor 120 also controls the brightness of the second main flicker area AM2 and the second sub-flicker area AB2 according to the third gamma value G3. The third gamma value G3 is different from the first gamma value G1 and the second gamma value G2.

FIG. 7A shows a temporal diagram of gamma value changes according to other embodiments of the present disclosure, corresponding to the display panel 110 shown in FIG. 2 . FIG. 7B shows a time diagram of changes in the gamma value of the pixel circuit P corresponding to the first main flicker area AM1. The changing timing of the first sub-flash area AB1 will be the same as that in Figure 7B. FIG. 7C shows a time diagram of changes in the gamma value of the pixel circuit P corresponding to the second main flicker area AM2. The changing timing of the second sub-flash area AB2 will be the same as that in Figure 7C.

In the embodiment shown in FIGS. 7A to 7C , the processor 120 changes the gamma value of each area on the display panel 110 with every three periods being a brightness (flicker) change period Fd. During the first period F1 to the third period F3 of the change period Fd, the processor 120 sequentially adjusts the gamma values of the first main scintillation area AM1 and the first sub-flash area AB1 to the first gamma value G1, The second gamma value G2 and the third gamma value G3.

During the first period F1 to the third period F3, the processor 120 sequentially adjusts the gamma values of the first main scintillation area AM1 and the first sub-flash area AB1 to the first gamma value G1 and the second gamma value G1. value G2 and the third gamma value G3.

During the first period F1 to the third period F3, the processor 120 sequentially adjusts the gamma values of the second main scintillation area AM2 and the second sub-flash area AB2 to the second gamma value G2 and the third gamma value G2. value G3 and the first gamma value G1.

The control sequence of the gamma value can be adjusted arbitrarily. Figure 7D shows another changing time diagram of the gamma value corresponding to the second main scintillation area AM2 and the second sub-flash area AB2 in other embodiments. In this embodiment, the processor 120 sequentially adjusts the gamma values of the second main scintillation area AM2 and the second sub-flash area AB2 to the third gamma value G3, the first gamma value G1 and the second gamma value G1. Gamma value G2.

FIG. 8 shows a schematic diagram of a display panel 810 and its display screen according to other embodiments of the present disclosure. In Figure 8, similar elements related to the embodiment in Figure 2 are denoted by the same reference numerals for ease of understanding, and the specific principles of similar elements have been explained in detail in the previous paragraphs. If they are not related to the elements in Figure 8 Those that have a collaborative operation relationship and need to be introduced will not be described again here.

The display screen is divided into multiple areas: the first main flashing area AM1, the second main flashing area AM2, the third main flashing area AM3 and the background flashing area AB, and the background flashing area AB is subdivided into the first sub-flashing area AB1, the third main flashing area AB The second sub-blinking area AB2 and the third sub-blinking area AB3. The first sub-blinking area AB1, the second sub-blinking area AB2 and the third sub-blinking area AB3 are arranged staggered with each other. The area of the sub-flash areas AB1/AB2/AB3 is smaller than the main scintillation areas AM1/AM2/AM3.

FIG. 9A shows a calibration curve of multiple gamma values according to other embodiments of the present disclosure, corresponding to the display panel 810 shown in FIG. 8 . FIG. 9B shows a time diagram of gamma value changes of the pixel circuit corresponding to the first main flicker area AM1. The changing timing of the first sub-flash area AB1 will be the same as that in Figure 9B. FIG. 9C shows a time diagram of gamma value changes of the pixel circuit corresponding to the second main flicker area AM2. The changing timing of the second sub-flash area AB2 will be the same as that in Figure 9C. FIG. 9D shows a time diagram of gamma value changes of the pixel circuit corresponding to the third main flicker area AM3. The changing tense of the third sub-flash area AB3 will be the same as that in Figure 9D.

Specifically, the processor (not shown in Figure 8) adjusts the brightness of each area on the display panel 810 according to three gamma values G1, G2, and G3. During the same period, the first main flicker area AM1 and the first sub-flicker area AB1 correspond to the same gamma value, which are shown in gray areas in Figure 8 . The second main flicker area AM2 and the second sub-flicker area AB2 correspond to the same gamma value and are shown as white areas in Figure 8. The third main flicker area AM3 and the third sub-flicker area AB3 will correspond to the same gamma value, and are shown as hatched areas in Figure 8.

As shown in Figure 9B, during the first period F1 to the third period F3 of the change period Fd, the processor sequentially adjusts the gamma values of the first main scintillation area AM1 and the first sub-flash area AB1 to the first period F1 to the third period F3. A gamma value G1, a second gamma value G2 and a third gamma value G3.

As shown in Figure 9C, during the first period F1 to the third period F3, the processor sequentially adjusts the gamma values of the second main flicker area AM2 and the second sub-flicker area AB2 to the second gamma value. G2, the third gamma value G3 and the first gamma value G1.

As shown in Figure 9D, in the first period F1 to the third period F3, the processor sequentially adjusts the gamma values of the third main flicker area AM3 and the third sub-flicker area AB3 to the first gamma value. G1, the third gamma value G3 and the second gamma value G2. In other words, during any period F1 to F3, a part of the area on the display panel 110 is set to the first gamma value G1, another part is set to the third gamma value G3, and another part is set to the third gamma value G3. The second gamma value is G2. By periodically adjusting the gamma value, a flickering effect is produced.

As in the aforementioned embodiments, the processor can periodically change the gamma value (ie, change the brightness) of each area according to the update frequency of the display panel to form a flicker effect. The sequence of changes in the gamma value can be adjusted arbitrarily according to needs. Figures 10A to 10D are schematic diagrams showing changes in the gamma value of the background flicker area in different embodiments of the present disclosure. In the embodiment shown in Figures 10A to 10D, the change period includes three periods. The corresponding relationships of gamma values in different embodiments in different periods are respectively represented by the display screens F1a to F3a, F1b to F3b, F1c to F3c, and F1d to F3d in Figures 10A to 10D.

FIG. 11 is a schematic diagram of a display system according to another embodiment of the present disclosure. The display system includes a display device 200, a detection device 300 and a server 400. The display device 200 includes a display panel 210 and a processor 220, where the processor 220 can be communicatively connected to the server 400. In this embodiment, when the processor 220 regularly changes the brightness of the first main flashing area, the second main flashing area and the background flashing area to produce a flashing effect, the detection device 300 will detect the detection signal Sa of the user E, To determine whether the user E will be affected by the flicker effect when viewing the display image generated by the display panel 210 .

In one embodiment, the detection device 300 may be an electroencephalograph, and the detection signal Sa may include the brain signal of the user E. The detection device 300 will transmit the detected detection signal Sa to the server 400, so that the server 400 can generate the feedback signal Sb accordingly.

After the server 400 analyzes the received detection signal Sa, it will generate a corresponding feedback signal Sb, and send the feedback signal Sb back to the processor 220, so that the processor 220 uses the feedback signal Sb (or detection signal Sa), Dynamically adjust the gray scale value of the image signal received by the display device 200 . That is, the processor 220 will refer to a specific conversion table or use specific logic or calculation formulas to convert the initial grayscale value in the image signal into an adjusted grayscale value to change the intensity of the flicker.

Specifically, when the brightness of the first main flashing area, the second main flashing area and the background flashing area are regularly changed to produce a flashing effect, the server 400 continues to receive the detection signal Sa from the detection device 300 . After the flickering effect continues for a period of time (eg, one hour, one whole day), the server 400 generates a feedback signal Sb according to the detection signal Sa. Then, after receiving the feedback signal Sb, the processor 220 calculates each initial grayscale value in the image signal according to the "adjustment parameter value" to obtain each corresponding adjusted grayscale value. Wherein, the brightness difference between the adjusted gray scale values is larger or smaller than the difference between the initial gray scale values. The "adjustment parameter value" may be stored in the processor 220 in advance, or may be included in the feedback signal Sb.

In one embodiment, the calculation formula for the processor 220 to convert the initial grayscale value in the image signal into the adjusted grayscale value is as follows:

R’[n]＝Ra[n]×R＋R0[n]×(1-R) G’[n]＝Ga[n]×R+G0[n]×(1-R) B’[n]＝Ba[n]×R＋B0[n]×(1-R)

In the above calculation formula, Ra[n], Ga[n], and Ba[n] are the "initial grayscale values" corresponding to different sub-pixels (such as red, green, and blue) in the image signal, and n is the corresponding For the grayscale command of each pixel circuit, the value ranges from 0 to 255. Since each pixel is composed of multiple sub-pixels, in order to maintain white balance, the actual grayscale values corresponding to different sub-pixels are not necessarily the same. For example, when the grayscale command of a pixel is "n=128", the initial grayscale value of the red sub-pixel is 200 (Ra[128]=200), and the initial grayscale value of the green sub-pixel is 170 (Ga[128]=170), the initial grayscale value of the blue sub-pixel is 150 (Ba[128]=150), the aforementioned value will be determined based on the currently set gamma value.

Following on from the above, R0[n], G0[n], and B0[n] are commonly used grayscale settings for general monitors. They can be obtained from the default reference table or determined based on commonly used gamma values (such as 2.2). . For example: when the grayscale command of the pixel is "n=128", R0[128]=130, G0[128]=128, B0[128]=125. R is the adjustment parameter value. R’[n], G’[n], and B’[n] are the adjusted grayscale values finally calculated according to the calculation formula.

For example, if based on the first gamma value, Ra[128] is "200" and the adjustment parameter value is "0.5", then after substituting "200, 0.5" into the above calculation formula, the adjusted grayscale value R is calculated '[128] will be "165". In the same way, if Ra[128] is "80" according to the second gamma value, and the adjustment parameter value is also "0.5", then after substituting "80, 0.5" into the above calculation formula, the adjusted grayscale value is calculated R'[128] will be "105".

The aforementioned calculation formula corresponds to the embodiment of "generating flicker with two different gamma values" (for example: Figure 4A), but the calculation formula can also be applied to the implementation of multiple gamma values (for example: Figure 6A) example.

In some embodiments, the processor 220 may select and adjust the parameter value according to the feedback signal Sb. As shown in FIG. 11 , the processor 220 stores a plurality of adjustment parameter values R0˜Rn, which respectively represent flicker levels of different intensities. According to the feedback signal Sb (such as enhancing or weakening the flicker), the processor 220 will select different adjustment parameter values to calculate the adjustment gray scale value to dynamically adjust the intensity of the flicker. After obtaining the adjusted gray scale value, the processor 220 can still make the display device 200 present a flickering effect according to the currently set gamma and the corresponding adjusted gray scale value according to the method of the aforementioned embodiment (such as FIG. 3 ).

The components, method steps or technical features in the foregoing embodiments can be combined with each other and are not limited to the order of text description or the order of presentation of the figures in this disclosure.

Although the content of this disclosure has been disclosed in the above embodiments, it is not intended to limit the content of this disclosure. Anyone familiar with this art can make various changes and modifications without departing from the spirit and scope of this disclosure. Therefore, this disclosure The scope of protection of the content shall be determined by the scope of the patent application attached.

100:Display device

110:Display panel

120: Processor

200:Display device

210:Display panel

220: Processor

300:Detection device

400:Server

810:Display panel

E:User

Sa: detection signal

Sb: feedback signal

R0-Rn: Adjust parameter values

AM1: The first main flashing area

AM2: Second main flashing area

AM3: The third main flashing area

AB: background flashing area

AB1: The first sub-flash area

AB2: The second sub-flash area

AB3: The third sub-flash area

G0: Gamma value

G1: Gamma value

G2: Gamma value

G3: Gamma value

Fd: change cycle

F1-F3: period

F1a-F3a: display screen

F1b-F3b: display screen

F1c-F3c: display screen

F1d-F3d: display screen

S301-S303: Steps

Figure 1 is a schematic diagram of a display device according to some embodiments of the present disclosure. Figure 2 is a schematic diagram of a display panel and an image displayed therein according to some embodiments of the present disclosure. Figure 3 is a step flow chart of an image display method according to some embodiments of the present disclosure. FIG. 4A is a schematic diagram of calibration curves of multiple gamma values according to some embodiments of the present disclosure. Figures 4B to 4C are schematic diagrams illustrating changes in the gamma value of each region according to some embodiments of the present disclosure. Figures 5A-5B are schematic diagrams illustrating changes in the gamma value of each region according to some embodiments of the present disclosure. FIG. 6A is a schematic diagram of calibration curves of multiple gamma values according to some embodiments of the present disclosure. Figures 6B to 6C are schematic diagrams illustrating changes in the gamma value of each region according to some embodiments of the present disclosure. FIG. 7A is a schematic diagram of calibration curves of multiple gamma values according to some embodiments of the present disclosure. Figures 7B to 7D are schematic diagrams of changes in the gamma value of each region according to some embodiments of the present disclosure. FIG. 8 is a schematic diagram of a display panel and an image displayed therein according to some embodiments of the present disclosure. Figure 9A is a schematic diagram of calibration curves of multiple gamma values according to some embodiments of the present disclosure. Figures 9B to 9D are schematic diagrams illustrating changes in the gamma value of each region according to some embodiments of the present disclosure. Figures 10A to 10D are schematic diagrams of changes in the gamma value of the background flicker area in other embodiments of the present disclosure. Figure 11 is a schematic diagram of a display system according to some embodiments of the present disclosure.

Domestic storage information (please note in order of storage institution, date and number) without Overseas storage information (please note in order of storage country, institution, date, and number) without

S301-S303: Steps

Claims (20)

An image display method, including: driving a display panel, wherein the display panel includes a first main flashing area, a second main flashing area and a background flashing area, the background flashing area includes a plurality of first sub-flashing areas and a plurality of a second sub-flash region, and the area of any one of the first sub-flash regions and the second sub-flash regions is smaller than the area of the first main scintillation region and the area of the second main scintillation region; and according to A plurality of gamma values regularly change the brightness of the first main flickering area, the second main flickering area and the background flickering area, wherein during the same period, the first main flickering area and the first sub-flickering areas Corresponding to a same one of the gamma values, and the second main flicker area and the second sub-flicker areas correspond to another same one of the gamma values. The image display method as claimed in claim 1, wherein the method for regularly changing the brightness of the first main flickering area, the second main flickering area and the background flickering area includes: during a first period, according to a first gamma The gamma value controls the brightness of the first main flickering area and the first sub-flickering areas; and during the first period, the second main flickering area and the second sub-flickering areas are controlled according to a second gamma value. brightness. The image display method as described in claim 2, wherein the method for regularly changing the brightness of the first main flashing area, the second main flashing area and the background flashing area also includes: In a second period, the brightness of the first main flickering area and the first sub-flickering areas is controlled according to the second gamma value; and in the second period, the brightness of the first main flickering area and the first sub-flickering areas is controlled according to the first gamma value. The brightness of the two main flashing areas and the second sub-flickering areas. The image display method as claimed in claim 2, wherein the method for regularly changing the brightness of the first main flickering area, the second main flickering area and the background flickering area further includes: in a third period, according to the gamma One of the values controls the brightness of the first main flickering area, the first sub-flickering areas, the second main flickering area and the second sub-flickering areas. The image display method described in claim 1 further includes: receiving a feedback signal, and calculating an initial grayscale value in an image signal according to an adjustment parameter value to obtain an adjusted grayscale value. The image display method as described in claim 5, wherein the method of receiving the feedback signal includes: obtaining a brain signal of a user through a detection device; and generating the feedback signal based on the brain signal. The image display method as claimed in claim 1, wherein the ratio of the area of the first main flashing area to the area of one of the first sub-blinking areas is greater than 500. The image display method as claimed in claim 7, wherein the ratio of the area of the first main flashing area to the area of one of the first sub-blinking areas is greater than 1,000 but less than 150,000. The image display method of claim 1, wherein the first main flashing area and the second main flashing area have the same outline and are located on the same horizontal line. The image display method as described in claim 1, wherein the method of regularly changing the brightness of the first main flashing area, the second main flashing area and the background flashing area includes: adjusting the first main flashing area according to an update frequency of the display panel. The brightness of a main flashing area, the second main flashing area and the background flashing area, wherein the changing frequency of the brightness of the first main flashing area, the second main flashing area and the background flashing area is between 30 and 50 Hz. between. A display device includes: a display panel including a plurality of pixel circuits for presenting a display image, wherein the display image includes a first main flashing area, a second main flashing area and a background flashing area; wherein the The background scintillation area includes a plurality of first sub-flash areas and a plurality of second sub-flash areas, and the area of any one of the first sub-flash areas and the second sub-flash areas is smaller than that of the first main scintillation area. area and the second main flash the area of the area; and a processor coupled to the display panel and used to regularly change the brightness of the first main flashing area, the second main flashing area and the background flashing area according to a plurality of gamma values, In the same period, the first main flickering area and the first sub-flickering areas correspond to the same one of the gamma values, and the second main flickering area and the second sub-flickering areas correspond to The other identical one of those gamma values. The display device of claim 11, wherein in a first period, the processor is used to control the brightness of the first main flickering area and the first sub-flickering areas according to a first gamma value, and is used to The brightness of the second main flashing area and the second sub-flickering areas is controlled according to a second gamma value. The display device of claim 12, wherein in a second period, the processor is used to control the brightness of the first main flickering area and the first sub-flickering areas according to the second gamma value, and to The brightness of the second main flashing area and the second sub-flickering areas is controlled according to the first gamma value. The display device of claim 12, wherein in a third period, the processor is used to control the first main flickering area, the first sub-flickering areas, and the first sub-flickering area according to one of the gamma values. The brightness of the second main flashing area and the second sub-flickering areas. The display device as claimed in claim 11, wherein the processing The device is also used to receive a feedback signal, and calculate an initial grayscale value in an image signal according to an adjustment parameter value to obtain an adjusted grayscale value. The display device of claim 15, wherein the processor is further used to obtain a brain signal of a user through a detection device, so as to generate the feedback signal based on the brain signal. The display device of claim 11, wherein the ratio of the area of the first main flashing area to the area of one of the first sub-blinking areas is greater than 500. The display device of claim 17, wherein the ratio of the area of the first main flashing area to the area of one of the first sub-blinking areas is greater than 1,000 but less than 150,000. The display device of claim 11, wherein the first main flashing area and the second main flashing area have the same outline and are located on the same horizontal line. The display device of claim 11, wherein the processor is used to adjust the brightness of the first main flashing area, the second main flashing area and the background flashing area according to an update frequency of the display panel, and the first The changing frequency of the brightness of the main flashing area, the second main flashing area and the background flashing area The rate is between 30 and 50 Hz.

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