Display device and image display method

Abstract

A display device and an image display method. The image display method includes the steps of: driving a display panel, wherein the display panel includes a first main flicker area, a second main flicker area, and a background flicker area, the background flicker area includes a plurality of first sub flicker areas and a plurality of second sub flicker areas, and an area of any one of the first sub flicker areas and the second sub flicker areas is smaller than an area of the first main flicker area and an area of the second main flicker area; and periodically changing luminance of the first main flicker area, the second main flicker area, and the background flicker area according to a plurality of gamma values, wherein in the same period, the first main flicker area and the first sub flicker areas correspond 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.

Description

Technical Field

[0001] The present disclosure relates to a technology for presenting an image according to an image signal, and more particularly to a display device and an image display method. Background Art

[0002] With the rapid advancement of electronic technology, display devices have been widely used in people's lives, such as smart phones and computers. Display devices control the brightness of each pixel on the display panel in different frames to present corresponding images.

[0003] According to research, flickering light at a specific frequency can stimulate gamma brain waves in Alzheimer's patients (mice used in the study), reduce beta-amyloid protein in the brain, and improve microglial function. In other words, flickering light can effectively improve the cognitive abilities of Alzheimer's mice. However, if a display device is flickering at a specific frequency, it will cause discomfort when the user is viewing the image, making this technology unusable in display devices. Summary of the Invention

[0004] The present disclosure relates to an image display method, comprising the following steps: driving a display panel, wherein the display panel comprises a first main flashing area, a second main flashing area, and a background flashing area, the background flashing area comprises a plurality of first sub-flashing areas and a plurality of second sub-flashing areas, and the area of ​​any one of these first sub-flashing areas and these second sub-flashing areas is smaller than the area of ​​the first main flashing area and the area of ​​the second main flashing area; and periodically changing 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, wherein in the same period, the first main flashing area and these first sub-flashing areas correspond to the same one of these gamma values, and the second main flashing area and these second sub-flashing areas correspond to another same one of these gamma values.

[0005] The present disclosure also relates to a display device comprising a display panel and a processor. The display panel comprises a plurality of pixel circuits for presenting a display screen. The display screen comprises a first main flashing area, a second main flashing area, and a background flashing area. The background flashing area comprises a plurality of first sub-flashing areas and a plurality of second sub-flashing areas, and the area of ​​any one of these first sub-flashing areas and these second sub-flashing areas is smaller than the area of ​​the first main flashing area and the area of ​​the second main flashing area. The processor is coupled to the display panel and is used to periodically 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. During the same period, the first main flashing area and the first sub-flashing area correspond to the same one of these gamma values, and the second main flashing area and the second sub-flashing area correspond to another same one of these gamma values.

[0006] Accordingly, since the display device adjusts the luminance of different regions in the display image by changing the gamma value, the display device does not cause excessive computational load on the hardware. In addition, by dividing the background flicker into a plurality of sub-flicker regions arranged in an interlaced manner, the problem of screen burn-in on the display panel can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 A schematic diagram of a display device according to some embodiments of the present disclosure.

[0008] Figure 2 A schematic diagram of a display panel and an image displayed thereon according to some embodiments of the present disclosure.

[0009] Figure 3 A schematic diagram of a display panel and an image displayed thereon according to some embodiments of the present disclosure.

[0010] Figure 4A A schematic diagram of a display panel and an image displayed thereon according to some embodiments of the present disclosure.

[0011] Figures 4B-4C A schematic diagram of a display panel and an image displayed thereon according to some embodiments of the present disclosure.

[0012] Figures 5A-5B A schematic diagram of a display panel and an image displayed thereon according to some embodiments of the present disclosure.

[0013] Figure 6A A schematic diagram of a display panel and an image displayed thereon according to some embodiments of the present disclosure.

[0014] Figures 6B-6C A schematic diagram of a display panel and an image displayed thereon according to some embodiments of the present disclosure.

[0015] Figure 7A A schematic diagram of a display panel and an image displayed thereon according to some embodiments of the present disclosure.

[0016] Figures 7B-7D A schematic diagram of a display panel and an image displayed thereon according to some embodiments of the present disclosure.

[0017] Figure 8 A schematic diagram of a display panel and an image displayed thereon according to some embodiments of the present disclosure.

[0018] Figure 9A A schematic diagram of a display panel and an image displayed thereon according to some embodiments of the present disclosure.

[0019] Figures 9B-9DFIG. 4 is a schematic diagram illustrating the temporal changes of gamma values ​​of various regions according to some embodiments of the present disclosure.

[0020] Figures 10A-10D FIG. 1 is a schematic diagram showing the temporal change of the gamma value of the background flickering area in some other embodiments of the present disclosure.

[0021] Figure 11 is a schematic diagram of a display system according to some embodiments of the present disclosure.

[0022]

Explanation of symbols

[0023] 100: Display device

[0024] 110: Display panel

[0025] 120: Processor

[0026] 200: Display device

[0027] 210: Display panel

[0028] 220: Processor

[0029] 300: Detection device

[0030] 400: Server

[0031] 810: Display panel

[0032] E: User

[0033] Sa: Detection signal

[0034] Sb: feedback signal

[0035] R0-Rn: Adjust parameter values

[0036] AM1: The first main flashing area

[0037] AM2: Second main flashing area

[0038] AM3: The third main flashing area

[0039] AB: Background flashing area

[0040] AB1: first sub-flash area

[0041] AB2: Second sub-flash area

[0042] AB3: The third sub-flash area

[0043] G0: Gamma value

[0044] G1: Gamma value

[0045] G2: Gamma value

[0046] G3: Gamma value

[0047] Fd: Change cycle

[0048] F1-F3: Period

[0049] F1a-F3a: Display screen

[0050] F1b-F3b: Display screen

[0051] F1c-F3c: Display screen

[0052] F1d-F3d: Display screen

[0053] S301-S303: Steps DETAILED DESCRIPTION

[0054] The following drawings illustrate various embodiments of the present invention. For clarity, many practical details are included in the following description. However, it should be understood that these practical details are not intended to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not essential. Furthermore, to simplify the drawings, some well-known and commonly used structures and components are depicted in simplified schematic form.

[0055] In this document, when an element is referred to as being "connected" or "coupled," it may refer to being "electrically connected" or "electrically coupled." "Connected" or "coupled" may also refer to the coordinated operation or interaction between two or more elements. Furthermore, while terms such as "first," "second," and so on are used herein to describe different elements, these terms are intended solely to distinguish between elements or operations described using the same technical terms. Unless the context clearly indicates otherwise, these terms are not intended to specify or imply an order or sequence, nor are they intended to limit the present invention.

[0056] Figure 1 FIG2 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 to receive control signals from the processor 120. The display panel 110 includes a plurality of pixel circuits P. Each pixel circuit P is configured to drive an internal light-emitting element (e.g., a light-emitting diode or an organic light-emitting diode) according to a control signal to display an image on the display panel 110.

[0057] Figure 2Figure 1 shows a schematic diagram of the display panel 110 and the image it displays. When the display panel 110 is driven by the processor 120, the pixel circuits P generate different brightness or colors based on control signals to form an image. The image comprises multiple regions: a first main flashing area AM1, a second main flashing area AM2, and a background flashing area AB. In other words, each region is formed by the brightness generated by the corresponding pixel circuit P on the display panel 110.

[0058] In one embodiment, the outlines of the first main flashing area AM1 and the second main flashing area AM2 are triangular, and the remaining area is the background flashing area AB. The background flashing area AB can be further divided into a plurality of first sub-flashing areas AB1 and a plurality of second sub-flashing areas AB2. The outlines of these first sub-flashing areas AB1 and these second sub-flashing areas AB2 are rectangular or polygonal, and are arranged in a staggered manner.

[0059] The area of ​​each of the first main flashing area AM1 and the second main flashing area AM2 is larger than the area of ​​each of the first sub-flashing area AB1 and the second sub-flashing area AB2. However, the outlines of the first main flashing area AM1, the second main flashing area AM2, the first sub-flashing area AB1, and the second sub-flashing area AB2 are not limited and can be rectangular, triangular, circular, or polygonal, and their positions can be adjusted arbitrarily.

[0060] 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 (e.g., a computer or an audio / video network) and generates a corresponding control signal (e.g., a driving voltage) based on the brightness of the image to be presented in the image signal. In one embodiment, the processor 120 can be implemented as a microcontroller, a microprocessor, a digital signal processor, an application-specific integrated circuit (ASIC), or a logic circuit. In some embodiments, the processor 120 can be integrated into a timing controller (TCON) of the display device 100.

[0061] The processor 120 is provided with a plurality of gamma values. The gamma value is a parameter in the relative relationship between the input signal and the output signal in the display device, and 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 the digital image. The processor 120 generates a corresponding control signal (such as a driving voltage) based on the image signal and the set gamma value. Therefore, when the display device is set to different gamma values, the size of the control signal (such as the driving voltage) corresponding to the same grayscale instruction will also be different, and the actual brightness displayed will also be different.

[0062] The processor 120 periodically changes the brightness of the first main flashing area AM1, the second main flashing area AM2, and the background flashing area AB according to multiple gamma values. During the same period, the first main flashing area AM1 and the first sub-flashing area AB1 correspond to the same gamma value, while the second main flashing area AM2 and the second sub-flashing area AB2 correspond to different gamma values. Figure 2 In FIG. 1 , the gray areas (ie, the first main flashing area AM1 and the first sub-flashing area AB1 ) correspond to the same gamma value; the white areas (ie, the second main flashing area AM2 and the second sub-flashing area AB2 ) correspond to another same gamma value.

[0063] Processor 120 changes the gamma value at a preset frequency, creating a regular flickering effect on the displayed image. Processor 120 adjusts the brightness of each region by varying the gamma value based on the update frequency of display panel 110. Consequently, the brightness of each region in the displayed image will periodically vary. This frequency ranges from 30 to 50 Hz, and in some embodiments, can be as high as 40 Hz, which can be used to stimulate gamma brain waves in Alzheimer's patients.

[0064] The present 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-flashing area AB1 and the second sub-flashing area AB2, and the first sub-flashing area AB1 and the second sub-flashing area AB2 are arranged in an interlaced manner. Accordingly, since the display device 100 uses "changing the gamma value" to produce the flickering effect, the original image signal does not need to be further calculated for the "flickering" effect, thereby avoiding excessive computing load on the hardware. In addition, the staggered arrangement of multiple sub-flashing areas in the background flickering area AB will prevent the display panel 110 from having the problem of screen burn-in (image sticking) and prevent the user's eyes from feeling uncomfortable due to the flickering light.

[0065] like Figure 2As shown, 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 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-flashing area AB1 (or the second sub-flashing area AB2) is greater than 500. In 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-flashing area AB1 (or the second sub-flashing area AB2) is greater than 1000 but less than 150,000. In 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-flashing area AB1 (or the second sub-flashing area AB2) is between 1600 and 129,600.

[0066] Figure 3 The figure shows a flowchart of the steps of the image display method according to the present disclosure. Figure 2 、 3 4A to 4C are described below. In step S301, the processor 120 receives an image signal and generates a control signal according to the image signal. In some embodiments, the image signal includes a grayscale instruction for each pixel circuit, and the control signal is a driving voltage corresponding to the grayscale instruction.

[0067] As previously described, 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 a first sub-flashing area AB1 and a second sub-flashing area AB2). The first main flashing area AM1 and the first sub-flashing area AB1 correspond to the same gamma value and change periodically. The second main flashing area AM2 corresponds to a different gamma value and changes periodically. Therefore, the processor 120 operates on the image signal according to the different gamma values ​​to generate a control signal corresponding to each pixel circuit P.

[0068] In subsequent steps S302 to S303 , the processor 120 periodically changes the brightness of each region according to the multiple gamma values ​​to produce a flickering effect. Figure 4A The figure shows a calibration curve diagram for multiple gamma values ​​G0-G2. The vertical axis represents the gamma value, and the horizontal axis represents time. The default gamma value G0 is a commonly used gamma value for general display devices (e.g., 2.2). The first gamma value G1 is greater than the default gamma value G0, and the second gamma value G2 is less than the default gamma value G0. Figure 4B The figure shows the gamma value change time state diagram of the pixel circuit P corresponding to the first main flashing area AM1. Figure 4B same. Figure 4C The figure shows the gamma value change time state diagram of the pixel circuit P corresponding to the second main flashing area AM2. The change time state of the second sub-flash area AB2 will be Figure 4C same.

[0069] For the same grayscale value, the processor 120 drives the pixel circuit according to the first gamma value G1, so its actual brightness is greater than the actual brightness corresponding to the preset gamma value. Conversely, the processor 120 drives the pixel circuit according to the second gamma value G2, so its actual brightness is less than the actual brightness corresponding to the preset gamma value.

[0070] Specifically, in step S302, during a first period F1 of a variation cycle Fd, the processor 120 controls the brightness of the first main flashing area AM1 and the first sub-flashing area AB1 according to the first gamma value G1. The processor 120 also controls the brightness of the second main flashing area AM2 and the second sub-flashing area AB2 according to the second gamma value G2.

[0071] In step S303, during the second period of a change cycle Fd, the processor 120 changes the gamma values ​​corresponding to the first main flashing area AM1 and the first sub-flashing area AB1 (e.g., from the first gamma value G1 to the second gamma value G2), and changes the gamma values ​​of the second main flashing area AM2 and the second sub-flashing area AB2 (e.g., from the second gamma value G2 to the first gamma value G1), so that the display panel 110 presents a periodic flashing effect, and the flashing areas of the background flashing area AB are staggered.

[0072] In this embodiment, the processor 120 switches the gamma values ​​of different areas between the first gamma value G1 and the second gamma value G2 in sequence. In other words, during the second period F2, the processor 120 controls the brightness of the first main flashing area AM1 and the first sub-flashing area AB1 according to the second gamma value G2. The processor 120 also controls the brightness of the second main flashing area AM2 and the second sub-flashing 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 values ​​corresponding to different areas every 1 / 80 second (i.e., the duration of the first period F1 and the second period F2), and each 1 / 40 second is a brightness change cycle Fd. Therefore, the flicker frequency of the display panel 110 is 40 Hz.

[0073] Figures 5A and 5B are time-varying diagrams of gamma values ​​in other embodiments of the present disclosure. Figure 5A The figure shows the gamma value change time state of the pixel circuit P corresponding to the first main flashing area AM1. Figure 5A same. Figure 5B The figure shows the gamma value change time state diagram of the pixel circuit P corresponding to the second main flashing area AM2. The change time state of the second sub-flash area AB2 will be Figure 5B same.

[0074] In one embodiment, the variation period Fd further includes a third period F3. During the third period F3 following the second period F2, the processor 120 sets the gamma values ​​of all regions to the same gamma value (e.g., the second gamma value G2) and controls the brightness of all regions based on this gamma value. In this embodiment, the display panel 110 has an update frequency of 120 Hz. In other words, the processor 120 changes the gamma values ​​corresponding to different regions every 1 / 120 second (i.e., the duration of the first period F1, the second period F2, and the third period F3). Since the gamma value changes in a cycle of three periods, the flicker frequency of the display panel 110 remains at 40 Hz.

[0075] As described in the aforementioned embodiments, in some embodiments, the update frequency of the display panel 110 is an integer multiple of the brightness (flicker) variation frequency. For example, when the display panel 110 update frequency is 80 Hz, the brightness (flicker) variation frequency is 40 Hz, divided into two periods. Similarly, when the display panel 110 update frequency is 120 Hz, the brightness (flicker) variation frequency is 40 Hz, divided into three periods.

[0076] Figure 6A Schematic diagram of correction curves of multiple gamma values ​​according to other embodiments of the present disclosure, corresponding to Figure 2 The display panel 110 is shown. Figure 6B The figure shows the gamma value change time state of the pixel circuit P corresponding to the first main flashing area AM1. Figure 6B same. Figure 6C The figure shows the gamma value change time state diagram of the pixel circuit P corresponding to the second main flashing area AM2. The change time state of the second sub-flash area AB2 will be Figure 6C Same. Figure 6A As shown, the processor 120 adjusts the brightness of each area on the display panel 110 according to the three gamma values ​​G1, G2, and G3.

[0077] During the first period F1 of the variation cycle Fd, the processor 120 controls the brightness of the first main flashing area AM1 and the first sub-flashing area AB1 according to the first gamma value G1 and the second main flashing area AM2 and the second sub-flashing area AB2 according to the second gamma value G2.

[0078] During the second period F2 of the variation cycle Fd, the processor 120 controls the brightness of the first main flashing area AM1 and the first sub-flashing area AB1 according to the second gamma value G2. The processor 120 also controls the brightness of the second main flashing area AM2 and the second sub-flashing area AB2 according to the first gamma value G1.

[0079] During the third period F3 of the variation cycle Fd, the processor 120 controls the brightness of the first main flashing area AM1 and the first flashing sub-area AB1 according to the third gamma value G3. The processor 120 also controls the brightness of the second main flashing area AM2 and the second flashing sub-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.

[0080] Figure 7A The gamma value variation time diagram of another embodiment of the present disclosure is shown, corresponding to Figure 2 The display panel 110 is shown. Figure 7B The figure shows the gamma value change time state of the pixel circuit P corresponding to the first main flashing area AM1. Figure 7B same. Figure 7C The figure shows the gamma value change time state diagram of the pixel circuit P corresponding to the second main flashing area AM2. The change time state of the second sub-flash area AB2 will be Figure 7C same.

[0081] exist Figures 7A-7C In the illustrated embodiment, the processor 120 changes the gamma values ​​of each region on the display panel 110 with a brightness (flicker) variation cycle Fd, where each of three periods constitutes a brightness (flicker) variation cycle. During the first to third periods F1 to F3 of the variation cycle Fd, the processor 120 sequentially adjusts the gamma values ​​of the first main flashing area AM1 and the first sub-flickering area AB1 to a first gamma value G1, a second gamma value G2, and a third gamma value G3.

[0082] During the first to third periods F1 to F3 , the processor 120 sequentially adjusts the gamma values ​​of the first main flashing area AM1 and the first sub-flashing area AB1 to the first gamma value G1 , the second gamma value G2 , and the third gamma value G3 .

[0083] During the first to third periods F1 to F3 , the processor 120 sequentially adjusts the gamma values ​​of the second main flashing area AM2 and the second sub-flashing area AB2 to the second gamma value G2 , the third gamma value G3 , and the first gamma value G1 .

[0084] The control order of gamma value can be adjusted arbitrarily. Figure 7D FIG2 shows another time-varying diagram of the gamma values ​​corresponding to the second main flashing area AM2 and the second sub-flashing area AB2 in another embodiment. In this embodiment, the processor 120 sequentially adjusts the gamma values ​​of the second main flashing area AM2 and the second sub-flashing area AB2 to the third gamma value G3, the first gamma value G1, and the second gamma value G2.

[0085] Figure 8 FIG. 8 is a schematic diagram of a display panel 810 and its display screen according to another embodiment of the present disclosure.Figure 8 In, with Figure 2 Similar elements related to the embodiments of the present invention are denoted by the same reference numerals for ease of understanding, and the specific principles of similar elements have been described in detail in the previous paragraphs. Figure 8 The components have a cooperative operation relationship and need to be introduced, so they will not be repeated here.

[0086] 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. The background flashing area AB is further divided into the first sub-flashing area AB1, the second sub-flashing area AB2, and the third sub-flashing area AB3. The first sub-flashing area AB1, the second sub-flashing area AB2, and the third sub-flashing area AB3 are arranged in an interlaced manner. The areas of the sub-flashing areas AB1, AB2, and AB3 are smaller than those of the main flashing areas AM1, AM2, and AM3.

[0087] Figure 9A Shown are correction curves of multiple gamma values ​​according to other embodiments of the present disclosure, corresponding to Figure 8 Display panel 810 is shown. Figure 9B The figure shows the gamma value change time state diagram of the pixel circuit corresponding to the first main flashing area AM1. The change time state of the first sub-flash area AB1 will be Figure 9B same. Figure 9C The figure shows the gamma value change time state diagram of the pixel circuit corresponding to the second main flashing area AM2. The change time state of the second sub-flash area AB2 will be Figure 9C same. Figure 9D The figure shows the gamma value change time state diagram of the pixel circuit corresponding to the third main flashing area AM3. The change time state of the third sub-flash area AB3 will be the same as Figure 9D same.

[0088] Specifically, the processor ( Figure 8 (not shown) adjusts the brightness of each area on the display panel 810 according to the three gamma values ​​G1, G2, and G3. In the same period, the first main flashing area AM1 and the first sub-flashing area AB1 correspond to the same gamma value. Figure 8 The second main flashing area AM2 and the second sub-flashing area AB2 will correspond to the same gamma value. Figure 8 The third main flashing area AM3 and the third sub-flashing area AB3 will correspond to the same gamma value. Figure 8 The area is shown in the slashed area.

[0089] like Figure 9B As shown, during the first to third periods F1 to F3 of the variation period Fd, the processor sequentially adjusts the gamma values ​​of the first main flashing area AM1 and the first sub-flashing area AB1 to the first gamma value G1, the second gamma value G2, and the third gamma value G3.

[0090] As shown in FIG. 1, the processor adjusts the gamma value of the first main flicker area AM1 and the first sub flicker area AB1 to the second gamma value G2, the third gamma value G3 and the first gamma value G1 in the first period F1 to the third period F3. Figure 9C

[0091] As shown in FIG. 2, the processor adjusts the gamma value of the second main flicker area AM2 and the second sub flicker area AB2 to the first gamma value G1, the third gamma value G3 and the second gamma value G2 in the first period F1 to the third period F3. In other words, in any of the periods F1 to F3, there will be a portion of the display panel 110 being set to the first gamma value G1, another portion being set to the third gamma value G3, and another portion being set to the second gamma value G2. By periodically adjusting the gamma value, the flicker effect is generated. Figure 9D As in the foregoing embodiments, the processor can periodically change the gamma value (i.e. change the brightness) of each area according to the update frequency of the display panel to form the flicker effect. The change order of the gamma value can be arbitrarily adjusted according to the requirement.

[0092] Figures 10A-10D As shown in FIG. 3, the change period comprises three periods. The corresponding relationship between the gamma value in different periods in different embodiments is respectively shown in FIG. 4a to FIG. 4d. Figures 10A-10D As shown in FIG. 5, the change period comprises three periods. The corresponding relationship between the gamma value in different periods in different embodiments is respectively shown in FIG. 6a to FIG. 6d. Figures 10A-10D The display screens F1a to F3a, F1b to F3b, F1c to F3c, F1d to F3d in FIG. 7a to FIG. 7d respectively represent the corresponding relationship between the gamma value in different periods in different embodiments.

[0093] Figure 11 As shown in FIG. 8, the display system comprises a display device 200, a detection device 300 and a server 400. The display device 200 comprises a display panel 210 and a processor 220, wherein the processor 220 is communicatively connected to the server 400. In this embodiment, when the processor 220 periodically changes the brightness of the first main flicker area, the second main flicker area and the background flicker area to generate the flicker effect, the detection device 300 detects the detection signal Sa of the user E to determine whether the user E will be affected when watching the display screen generated by the display panel 210 due to the flicker effect.

[0094] In an embodiment, the detection device 300 can be an electroencephalograph, and the detection signal Sa can comprise the brain signal of the user E. The detection device 300 transmits the detected detection signal Sa to the server 400, so that the server 400 can generate the feedback signal Sb.

[0095] ​​After analyzing the received detection signal Sa, the server 400 generates a corresponding feedback signal Sb and transmits the feedback signal Sb back to the processor 220. The processor 220 then dynamically adjusts the grayscale values ​​of the image signal received by the display device 200 based on the feedback signal Sb (or the detection signal Sa). Specifically, the processor 220 converts the initial grayscale values ​​in the image signal into adjusted grayscale values ​​based on a specific conversion table or through specific logic or calculation formulas to reduce or mitigate flicker intensity.

[0096] Specifically, when the brightness of the first main flashing area, the second main flashing area and the background flashing area is periodically changed to produce a flashing effect, the server 400 continues to receive the detection signal Sa from the detection device 300. After the flashing effect lasts for a period of time (such as one hour, a whole day), the server 400 generates a feedback signal Sb based on 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 the corresponding adjusted grayscale values. The brightness difference between the adjusted grayscale values ​​is greater or smaller than the difference between these initial grayscale values. The "adjustment parameter value" can be stored in the processor 220 in advance, or it can be included in the feedback signal Sb.

[0097] In one embodiment, the processor 220 converts the initial grayscale value in the image signal into the adjusted grayscale value using the following formula:

[0098] R'[n]=Ra[n]×R+R0[n]×(1-R)

[0099] G'[n]=Ga[n]×R+G0[n]×(1-R)

[0100] B'[n]=Ba[n]×R+B0[n]×(1-R)

[0101] In the above 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 grayscale instruction corresponding to each pixel circuit, with a value between 0 and 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 may not be the same. For example, when the grayscale instruction of the pixel is "n = 128", the initial grayscale value of the red sub-pixel is 200 (Ra

[128] = 200), the initial grayscale value of the green sub-pixel is 170 (Ga

[128] = 170), and the initial grayscale value of the blue sub-pixel is 150 (Ba

[128] = 150). The above values ​​are determined by the currently set gamma value.

[0102] Continuing from above, R0[n], G0[n], and B0[n] are the commonly used grayscale settings for general monitors. They can be obtained from a preset reference table or determined based on a commonly used gamma value (e.g., 2.2). For example, when the pixel grayscale instruction is "n = 128," R0

[128] = 130, G0

[128] = 128, and B0

[128] = 125. R is the adjustment parameter value. R'[n], G'[n], and B'[n] are the final calculated grayscale values.

[0103] For example, if according to 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 calculated adjusted grayscale value R'

[128] will be "165". Similarly, if according to the second gamma value, Ra

[128] is "80" and the adjustment parameter value is also "0.5", then after substituting "80, 0.5" into the above calculation formula, the calculated adjusted grayscale value R'

[128] will be "105".

[0104] The above calculation formula corresponds to the embodiment of "generating flicker with two different gamma values" (such as: Figure 4A ), but the calculation can also be applied to multiple gamma values ​​(such as: Figure 6A ) embodiment.

[0105] In some embodiments, the processor 220 may select an adjustment parameter value according to the feedback signal Sb. Figure 11 As shown, the processor 220 stores a plurality of adjustment parameter values ​​R0 to Rn, each representing a flicker level of different intensities. According to the feedback signal Sb (e.g., enhancing or weakening the flicker), the processor 220 will select different adjustment parameter values ​​to calculate the adjusted grayscale value to dynamically adjust the intensity of the flicker. After obtaining the adjusted grayscale value, the processor 220 can still perform the operation according to the aforementioned embodiment (e.g., Figure 3 ) method, according to the currently set gamma and the corresponding adjusted grayscale value, the display device 200 presents a flickering effect.

[0106] The various elements, method steps or technical features in the aforementioned embodiments may be combined with each other and are not limited to the order of description in the text or the order of presentation in the drawings in this disclosure.

[0107] Although the present disclosure has been disclosed in the form of implementation methods as described above, it is not intended to limit the present disclosure. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the scope defined in the appended claims.

Claims

1. An image display method, comprising: 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 second sub-flashing areas, and an area of ​​any one of the first sub-flashing areas and the second sub-flashing areas is smaller than an area of ​​the first main flashing area and an area of ​​the second main flashing area; and The brightness of the first main flashing area, the second main flashing area and the background flashing area are periodically changed according to multiple gamma values, wherein in the same period, the first main flashing area and the first sub-flashing area correspond to the same one of the gamma values, and the second main flashing area and the second sub-flashing area correspond to another same one of the gamma values.

2. The image display method of claim 1 , wherein the method of periodically changing the brightness of the first main flashing area, the second main flashing area, and the background flashing area comprises: During a first period, controlling the brightness of the first main flashing area and the first sub-flashing area according to a first gamma value; and During the first period, the brightness of the second main flashing area and the second sub-flashing area is controlled according to a second gamma value.

3. The image display method of claim 2 , wherein the method of periodically changing the brightness of the first main flashing area, the second main flashing area, and the background flashing area further comprises: During a second period, the brightness of the first main flashing area and the first sub-flashing area is controlled according to the second gamma value; and During the second period, the brightness of the second main flashing area and the second sub-flashing area is controlled according to the first gamma value.

4. The image display method of claim 2 , wherein the method of periodically changing the brightness of the first main flashing area, the second main flashing area, and the background flashing area further comprises: In a third period, the brightness of the first main flashing area, the first sub flashing area, the second main flashing area, and the second sub flashing area is controlled according to one of the first gamma value and the second gamma value.

5. The image display method according to claim 1, further comprising: The feedback signal is received, and an initial grayscale value in the image signal is calculated according to the adjustment parameter value to obtain an adjusted grayscale value.

6. The image display method as claimed in claim 5, wherein a method of receiving the feedback signal comprises: Obtaining the user's brain signals through a detection device; and The feedback signal is generated according to the brain signal. 7 . The image display method as claimed in claim 1 , wherein a ratio of an area of ​​the first main flashing region to an area of ​​the first sub-flashing region is greater than 500. 8 . The image display method as claimed in claim 7 , wherein a ratio of an area of ​​the first main flashing region to an area of ​​the first sub-flashing region is greater than 1,000 but less than 150,000. 9 . The image display method as claimed in 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.

10. The image display method as claimed in claim 1 , wherein the method of periodically changing the brightness of the first main flashing area, the second main flashing area, and the background flashing area comprises: The brightness of the first main flashing area, the second main flashing area and the background flashing area is adjusted according to the update frequency of the display panel, wherein the brightness change frequency of the first main flashing area, the second main flashing area and the background flashing area is between 30 and 50 Hz.

11. A display device comprising: A display panel comprising a plurality of pixel circuits for presenting a display image, wherein the display image comprises 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 second sub-flashing areas, and an area of ​​any one of the first sub-flashing areas and the second sub-flashing areas is smaller than an area of ​​the first main flashing area and an area of ​​the second main flashing area; as well as A processor is coupled to the display panel and is used to periodically change the brightness of the first main flashing area, the second main flashing area and the background flashing area according to multiple gamma values, wherein in the same period, the first main flashing area and the first sub-flashing area correspond to the same one of the gamma values, and the second main flashing area and the second sub-flashing area correspond to another same one of the gamma values.

12. The display device as claimed in claim 11, wherein in a first period, the processor is used to control the brightness of the first main flashing area and the first sub-flashing area according to a first gamma value, and is used to control the brightness of the second main flashing area and the second sub-flashing area according to a second gamma value.

13. The display device as claimed in claim 12, wherein in the second period, the processor is used to control the brightness of the first main flashing area and the first sub-flashing area according to the second gamma value, and is used to control the brightness of the second main flashing area and the second sub-flashing area according to the first gamma value.

14. The display device of claim 12, wherein during a third period, the processor is configured to control brightness of the first main flashing area, the first sub-flashing area, the second main flashing area, and the second sub-flashing area according to one of the first gamma value and the second gamma value. 15 . The display device as claimed in claim 11 , wherein the processor is further configured to receive a feedback signal and perform calculations on an initial grayscale value in the image signal according to an adjustment parameter value to obtain an adjusted grayscale value.

16. The display device as claimed in claim 15, wherein the processor is further configured to obtain a brain signal of the user through a detection device, and to generate the feedback signal according to the brain signal. 17 . The display device as claimed in claim 11 , wherein a ratio of an area of ​​the first main flashing region to an area of ​​the first sub-flashing region is greater than 500. 18 . The display device as claimed in claim 17 , wherein a ratio of an area of ​​the first main flashing region to an area of ​​the first sub-flashing region is greater than 1,000 but less than 150,000. 19 . The display device as claimed in 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.

20. The display device of claim 11, wherein the processor is configured 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 a frequency of changing the brightness of the first main flashing area, the second main flashing area, and the background flashing area is between 30 and 50 Hz.

Images