TWI795857B - Method for avoiding screen burn-in and display and information processing device using same - Google Patents

Abstract

A method for avoiding screen burn-in, which includes: using a dynamic display data increment unit to perform a time-varying increment generation operation to generate a display increment value; using an addition unit to make each pixel data of a frame of display data correspond to the display increment The magnitudes are added to obtain an output data; and a driving unit is used to generate an analog voltage according to the output data to drive a pixel array.

Description

Method for avoiding screen burn-in and display and information processing device using same

The present invention relates to a display, in particular to a method for avoiding screen burn-in of the display.

Common displays, such as LED displays, OLED displays, or LCD displays, all suffer from screen burn-in problems. Screen burn-in refers to the irreversible pattern marks left after the same pattern (eg, TV channel logo, screen saver, etc.) is continuously displayed on the screen for a long time.

To solve the problem of screen burn-in, one solution is to change the overall or partial display position of the pattern at regular intervals to avoid excessive operation of the same pixel. However, since the human eye is quite easy to detect the positional fluctuation of the pattern, if the interval time is too short, the picture will appear to be jumping. Another solution is to record the brightness and operating time of each pixel, and perform brightness compensation for each pixel according to the brightness and operating time. However, this solution requires huge hardware and software resources to record Disadvantages of brightness information and operating time.

In order to solve the above problems, there is an urgent need in the art for a novel method for avoiding screen burn-in.

One object of the present invention is to disclose a method for avoiding screen burn-in, which can effectively solve the problem of long-term screen burn-in without changing the display position of a frame pattern on a screen, but only dynamically changing the display color or grayscale of its pixels. A possible screen burn-in issue when displaying a static pattern at the time.

Another object of the present invention is to disclose a method for avoiding screen burn-in, which can generate a plurality of different display increment values within a predetermined time in a sequential or random manner so that each pixel can have multiple display increments within the predetermined time. different display states, thus effectively avoiding screen burn-in.

Another object of the present invention is to disclose a method for avoiding screen burn-in, which can effectively prevent screen burn-in through a simple circuit structure.

To achieve the aforementioned purpose, a method for avoiding screen burn-in is proposed, which includes:

using a dynamic display data increment unit to perform a time-varying increment generation operation to generate a display increment value;

Using an addition unit to add each pixel data of a frame of display data to the display increment value to obtain an output data; and

A driving unit is used to generate an analog voltage to drive a pixel array according to the output data.

In a possible embodiment, the time-varying increment generation operation may generate a plurality of different display increment values within a predetermined time in a sequential or random manner.

In a possible embodiment, the format of the pixel data may be RGB, YUV, HSV, HSL or YCbCr.

In one embodiment, when the format of the pixel data is RGB, the driving unit generates the analog voltage directly according to the output data.

In a possible embodiment, when the format of the pixel data is YUV, HSV, HSL or YCbCr, the drive unit first performs a corresponding color gamut conversion operation on the output data to make the output data from YUV , HSV, HSL or YCbCr format data into an RGB output data, and then generate the analog voltage according to the RGB output data.

In order to achieve the aforementioned purpose, the present invention further proposes a display driving circuit, which includes a dynamic display data increment unit, an addition unit and a drive unit to perform a screen burn-in avoidance method, the method comprising:

Using the dynamic display data increment unit to perform a time-varying increment generating operation to generate a display increment value;

Using the addition unit to add each pixel data of a frame of display data to the display increment value to obtain an output data; and

The driving unit is used to generate an analog voltage to drive a pixel array according to the output data.

In a possible embodiment, the time-varying increment generation operation may generate a plurality of different display increment values within a predetermined time in a sequential or random manner.

In a possible embodiment, the format of the pixel data may be RGB, YUV, HSV, HSL or YCbCr.

In one embodiment, when the format of the pixel data is RGB, the driving unit generates the analog voltage directly according to the output data.

In a possible embodiment, when the format of the pixel data is YUV, HSV, HSL or YCbCr, the drive unit first performs a corresponding color gamut conversion operation on the output data to make the output data from YUV , HSV, HSL or YCbCr format data into an RGB output data, and then generate the analog voltage according to the RGB output data.

To achieve the aforementioned purpose, the present invention further provides a display, which has the aforementioned display driving circuit and pixel array.

In a possible embodiment, the pixel array may be a liquid crystal pixel array, a micro light emitting diode pixel array, a mini light emitting diode pixel array, a quantum dot light emitting diode pixel array or an organic light emitting diode pixel array.

To achieve the aforementioned purpose, the present invention further proposes an information processing device, which has a central processing unit and the aforementioned display, wherein the central processing unit is used to communicate with the display driving circuit.

In a possible embodiment, the information processing device may be a smart phone, a portable computer or a vehicle computer.

In order to enable your review committee members to further understand the structure, features and purpose of the present invention, drawings and detailed descriptions of preferred specific embodiments are hereby attached.

Principle of the present invention is:

The display position of a frame pattern on a screen is not changed, only the display color or gray scale of its pixels is dynamically changed. Specifically, the present invention presents multiple color configurations or grayscales within a predetermined time by making a frame pattern To avoid displaying a static pattern on the screen, the static pattern will be continuously displayed on the screen with the same display data configuration for a long time, thereby improving the phenomenon of screen burn-in.

Please refer to FIG. 1 , which shows a flowchart of an embodiment of the screen burn-in avoidance method of the present invention. As shown in Figure 1, the method for avoiding screen burn-in includes: using a dynamic display data increment unit to perform a time-varying increment generation operation to generate a display increment value (step a); utilizing an addition unit to make a frame of display data Each pixel data is added to the display increment value to obtain an output data (step b); and a driving unit is used to generate an analog voltage according to the output data to drive a pixel array (step c).

In step a, the time-varying increment generating operation is to generate a plurality of different display increment values within a predetermined time in a sequential or random manner.

In step b, the format of the pixel data may be RGB, YUV, HSV, HSL or YCbCr.

In step c, when the format of the pixel data is RGB, the drive unit generates the analog voltage directly according to the output data; when the format of the pixel data is YUV, HSV, HSL or YCbCr, the drive unit The drive unit first performs a corresponding color gamut conversion operation on the output data to convert the output data from YUV, HSV, HSL or YCbCr format data into an RGB output data, and then generates the RGB output data according to the RGB output data. Analog voltage. In addition, the pixel array may be a liquid crystal pixel array, a micro light emitting diode pixel array, a mini light emitting diode pixel array, a quantum dot light emitting diode pixel array or an organic light emitting diode pixel array.

Specifically, assuming that the display time of a static pattern exceeds 32 frames, and the pixel data of one (R, G, B) of the static pattern is (253, 253, 253), then during the display period of 32 frames, the ( R, G, B) pixel data will add a display increment value every time it enters the next frame display period, and the display increment value is a value selected from a plurality of predetermined values.

For example, referring to Table 1, there are two predetermined values of the displayed incremental value, +1 and -1, and the change rule is gradually decreasing and then gradually increasing. Table I R G B initial input data 253 253 253 Output data at frame 1 252 252 252 Output data at frame 2 251 251 251 Output data at frame 3 250 250 250 Output data at frame 4 249 249 249 Output data at frame 5 248 248 248 Output data at frame 6 247 247 247 Output data at frame 7 246 246 246 Output data at frame 8 245 245 245 Output data at frame 9 244 244 244 Output data at frame 10 243 243 243 Output data at frame 11 242 242 242 Output data at frame 12 241 241 241 Output data at frame 13 240 240 240 Output data at frame 14 239 239 239 Output data at frame 15 238 238 238 Output data at frame 16 237 237 237 Output data at frame 17 238 238 238 Output data at frame 18 239 239 239 Output data at frame 19 240 240 240 Output data at frame 20 241 241 241 Output data at frame 21 242 242 242 Output data at frame 22 243 243 243 Output data at frame 23 244 244 244 Output data at frame 24 245 245 245 Output data at frame 25 246 246 246 Output data at frame 26 247 247 247 Output data at frame 27 248 248 248 Output data at frame 28 249 249 249 Output data at frame 29 250 250 250 Output data at frame 30 251 251 251 Output data at frame 31 252 252 252 Output data at frame 32 253 253 253

For example, please refer to Table 2, there are two predetermined values of the displayed incremental value, +1 and -1, and the change rule is to select 4 -1s and then 4 +1s as a cycle to repeatedly modulate. Table II R G B initial input data 253 253 253 Output data at frame 1 252 252 252 Output data at frame 2 251 251 251 Output data at frame 3 250 250 250 Output data at frame 4 249 249 249 Output data at frame 5 250 250 250 Output data at frame 6 251 251 251 Output data at frame 7 252 252 252 Output data at frame 8 253 253 253 Output data at frame 9 252 252 252 Output data at frame 10 251 251 251 Output data at frame 11 250 250 250 Output data at frame 12 249 249 249 Output data at frame 13 250 250 250 Output data at frame 14 251 251 251 Output data at frame 15 252 252 252 Output data at frame 16 253 253 253 Output data at frame 17 252 252 252 Output data at frame 18 251 251 251 Output data at frame 19 250 250 250 Output data at frame 20 249 249 249 Output data at frame 21 250 250 250 Output data at frame 22 251 251 251 Output data at frame 23 252 252 252 Output data at frame 24 253 253 253 Output data at frame 25 252 252 252 Output data at frame 26 251 251 251 Output data at frame 27 250 250 250 Output data at frame 28 249 249 249 Output data at frame 29 250 250 250 Output data at frame 30 251 251 251 Output data at frame 31 252 252 252 Output data at frame 32 253 253 253

In addition, assuming that there are +2 and -2 predetermined values of the display increment value, the change rule may also be to modulate the display data by -2 or +2 in a random (or pseudo-random) manner.

In addition, the values of R, G, and B can jointly adopt a rule to determine the display incremental value or each use a rule to determine the display incremental value.

That is to say, according to the above method, when a display is displaying a static pattern, the display state of each pixel can be displayed in multiple display colors without changing the position of the static pattern on a screen. Or rotate in the gray scale, so as to delay or prevent the phenomenon of screen burn-in.

According to the above description, the present invention proposes a display driving circuit using the screen burn-in avoidance method. Please refer to FIG. 2 , which shows a block diagram of an embodiment of the display driving circuit of the present invention. As shown in FIG. 2, a display driving circuit 100 includes a dynamic display data increment unit 110, an addition unit 120, and a driving unit 130, wherein the dynamic display data increment unit 110 is used to perform a time-varying increment generation operation To generate a display increment value D _INC ; the addition unit 120 is used to make each pixel data D _PIX of a frame of display data be added to the display increment value D _INC to obtain an output data D _OUT respectively; and the drive unit 130 It is used to generate an analog voltage V _A to drive a pixel array 140 according to the output data D _OUT .

In operation, the screen burn-in avoidance method performed by the display driver circuit 100 includes:

(1) Make the dynamic display data increment unit 110 perform the time-varying increment generation operation to generate the display increment value D _INC , wherein the time-varying increment generation operation can be at a predetermined time in a sequential or random manner Generate a plurality of different display increment values D _INC , wherein the sequential method may be to use a timer to periodically generate a trigger signal, and generate a display increment according to each of the trigger signals value D _INC , and any two adjacent display increment values D _INC in time are different; and the random method may be to use a pseudo-random number generator to generate the display increment value D _INC .

(2) Make the addition unit 120 perform an addition operation on the pixel data D _PIX and the display increment value D _INC to obtain the output data D _OUT , wherein the format of the pixel data D _PIX can be RGB, YUV, HSV, HSL or YCbCr.

(3) Make the driving unit 130 generate the analog voltage V _A according to the output data D _OUT to drive the pixel array 140, wherein, when the format of the pixel data D _PIX is RGB, the driving unit 130 generates the analog voltage V directly according to the output data D _{OUT A} ; when the format of the pixel data D _PIX is YUV, HSV, HSL or YCbCr, the driving unit 130 system first carries out a corresponding color gamut conversion operation to the output data D _OUT so that the output data D _OUT is from YUV, HSV, HSL or The data in the YCbCr format is converted into an RGB output data, and then an analog voltage V _A is generated according to the RGB output data.

In addition, the pixel array 140 can be a liquid crystal pixel array, a micro light emitting diode pixel array, a mini light emitting diode pixel array, a quantum dot light emitting diode pixel array or an organic light emitting diode pixel array.

According to the above description, the present invention further proposes a display using the method for avoiding screen burn-in. Please refer to FIG. 3 , which shows a block diagram of an embodiment of the display of the present invention. As shown in FIG. 3 , a display 200 has a display driving circuit 210 and a pixel array 220 , wherein the display driving circuit 210 is realized by the display driving circuit 100 , and the pixel array 220 is realized by the pixel array 140 .

According to the above description, the present invention further discloses an information processing device. Please refer to FIG. 4 , which shows a block diagram of an embodiment of an information processing device of the present invention. As shown in FIG. 4 , an information processing device 300 has a central processing unit 310 and a display 320 , wherein the display 320 is realized by the display 200 , and the central processing unit 310 is used for communicating with the display driving circuit 210 .

In addition, in a possible embodiment, the information processing device 300 can be a smart phone, a portable computer or a vehicle computer.

With the design disclosed above, the present invention has the following advantages:

1. The method for avoiding screen burn-in of the present invention can effectively solve the problem that the screen displays a static pattern for a long time without changing the display position of a frame pattern on the screen and only dynamically changing the display color or gray scale of its pixels. The screen burn-in problem that may occur when

2. The screen burn-in avoidance method of the present invention can generate a plurality of different display increment values within a predetermined time in a sequential or random manner so that each pixel can have a plurality of different display states within the predetermined time, Thereby effectively avoiding screen burn-in phenomenon.

3. The method for preventing screen burn-in of the present invention can effectively prevent screen burn-in by a simple circuit structure.

What is disclosed in this case is a preferred embodiment. For example, any partial changes or modifications derived from the technical ideas of this case and easily deduced by those who are familiar with the technology are within the scope of the patent right of this case.

To sum up, regardless of the purpose, means and efficacy of this case, it shows that it is very different from the conventional technology, and its first invention is practical, and it does meet the patent requirements of the invention. I implore your review committee to understand it clearly and grant a patent as soon as possible. Society is for the Most Prayer.

100: display drive circuit 110: Dynamic display data incremental unit 120: Addition unit 130: drive unit 140: pixel array 200: display 210: display drive circuit 220: pixel array 300: Information processing device 310: Central Processing Unit 320: display Step a: Utilize a dynamic display data increment unit to perform a time-varying increment generating operation to generate a display increment value. Step b: using an adding unit to add each pixel data of a frame of display data to the display increment value to obtain an output data respectively. Step c: using a driving unit to generate an analog voltage according to the output data to drive a pixel array.

FIG. 1 shows a flow chart of an embodiment of the screen burn-in avoidance method of the present invention. FIG. 2 is a block diagram of an embodiment of a display driving circuit of the present invention. FIG. 3 shows a block diagram of an embodiment of the display of the present invention. FIG. 4 is a block diagram of an embodiment of an information processing device of the present invention.

Step a: Utilize a dynamic display data increment unit to perform a time-varying increment generating operation to generate a display increment value. Step b: using an adding unit to add each pixel data of a frame of display data to the display increment value to obtain an output data respectively. Step c: using a driving unit to generate an analog voltage according to the output data to drive a pixel array.

Claims (14)

A method for avoiding screen burn-in, which includes: using a dynamic display data increment unit to perform a time-varying increment generation operation to generate a display increment value; using an addition unit to make each pixel data of a frame of display data correspond to the display increment The magnitude values are added to obtain an output data; and a driving unit is used to generate an analog voltage according to the output data to drive a pixel array; wherein, the time-varying increment generation operation is to generate a plurality of different output data within a predetermined time A combination of the above display increment values, and the sum of the display increment values in the combination is 0. The method for avoiding screen burn-in as described in claim 1, wherein the combinations are generated sequentially or randomly. The method for avoiding screen burn-in as described in item 1 of the scope of the patent application, wherein the format of the pixel data is a format selected from the group consisting of RGB, YUV, HSV, HSL and YCbCr. The method for avoiding screen burn-in as described in item 3 of the scope of the patent application, wherein when the format of the pixel data is RGB, the driving unit generates the analog voltage directly according to the output data. The method for avoiding screen burn-in as described in item 3 of the scope of the patent application, wherein, when the format of the pixel data is YUV, HSV, HSL or YCbCr, the drive unit first performs a corresponding color gamut on the output data The conversion operation is used to convert the output data from YUV, HSV, HSL or YCbCr format data into RGB output data, and then generate the analog voltage according to the RGB output data. A display driving circuit, which includes a dynamic display data increment unit, an addition unit, and a drive unit to implement a screen burn-in avoidance method, the method includes: using the dynamic display data increment unit to perform a time-varying increment generation operation to Generate a display increment value; use the addition unit to add each pixel data of a frame of display data to the display increment value for each Obtaining an output data; and using the driving unit to generate an analog voltage according to the output data to drive a pixel array; wherein, the time-varying increment generation operation is to generate a plurality of different display increment values within a predetermined time One combination, and the sum of the display increment values in this combination is 0. In the display driving circuit described in item 6 of the scope of the patent application, the combination is generated in a sequential or random manner. The display driving circuit described in item 6 of the scope of the patent application, wherein the format of the pixel data is a format selected from the group consisting of RGB, YUV, HSV, HSL and YCbCr. The display driving circuit described in claim 8 of the patent application, wherein when the format of the pixel data is RGB, the driving unit generates the analog voltage directly according to the output data. The display driving circuit described in item 8 of the scope of the patent application, wherein, when the format of the pixel data is YUV, HSV, HSL or YCbCr, the driving unit first performs a corresponding color gamut conversion on the output data Operation is performed to convert the output data from YUV, HSV, HSL or YCbCr format data into RGB output data, and then generate the analog voltage according to the RGB output data. A display, which has a display driving circuit and a pixel array as described in any one of items 6 to 10 of the patent application scope. The display as described in item 11 of the scope of patent application, wherein the pixel array is composed of a liquid crystal pixel array, a micro light emitting diode pixel array, a mini light emitting diode pixel array, a quantum dot light emitting diode pixel array and an organic light emitting diode A pixel array selected from the group formed by the polar body pixel array. An information processing device has a central processing unit and a display as described in claim 11 of the scope of the patent application, wherein the central processing unit is used for communicating with the display driving circuit. The information processing device described in item 13 of the scope of the patent application is a device selected from a group consisting of a smart phone, a portable computer and a vehicle-mounted computer.

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