TWI536342B - Control method of display - Google Patents

Description

Display control method

The present invention relates to a display, and more particularly to a method of controlling a display.

Among the common visible light, the blue light is quite close to the ultraviolet light harmful to the human body. The blue light has a shorter wavelength and stronger energy, so the burden on the eyes is also relatively large. Long-time exposure to blue light is not only easy to cause eye fatigue, but also may cause major eye diseases. . Blu-ray is ubiquitous in people's lives. In addition to the blue light emitted by lighting devices, the screens of many electronic devices emit blue light. Therefore, watching electronic devices such as mobile phones, tablets, and computers for a long time may expose too much blue light. In order to reduce the damage of blue light to the eyes, the most direct way is to directly weaken the blue light in the three primary colors of the screen colors R, G, B, so that the electronic device can emit less blue light. However, in contrast, the intensity of blue light is weak, and the color of the screen will be yellowish, which affects the visual perception of the human eye.

In addition to blue light, other shades of light can also change strengths as needed. Based on the above background, how to effectively adjust the color of the screen to meet the needs of users, further improvement and research and development in the industry.

The invention relates to a control method for a display, which adjusts a color of a picture material to a gray in a corresponding sub-picture period by time domain allocation. The order value is used to reduce the intensity of the color corresponding to the image output.

According to an aspect of the invention, a method of controlling a display is provided, comprising the following steps. Sets the grayscale value of one of the colors of the display. Receiving a picture data during a picture period, the picture period includes a plurality of first sub-picture periods and a plurality of second sub-picture periods, and the first sub-picture periods and the second sub-picture periods are sequentially arranged. According to the set value of the color, the color in the control picture data displays a first gray level value during the first sub-picture period, and a second gray level value is displayed during the second sub-picture period. The first grayscale value is less than the set value of the color, the second grayscale value is greater than the set value of the color, and the average of the first grayscale value and the second grayscale value in the picture period Equal to the set value of this color.

In order to better understand the above and other aspects of the present invention, the preferred embodiments are described below, and in conjunction with the drawings, the detailed description is as follows:

100‧‧‧ display

101‧‧‧Control Module

102‧‧‧Light source module

103‧‧‧ display panel

FD‧‧‧ screen material

DS‧‧‧ drive signal

DB‧‧‧Display information

G‧‧‧ color setting

G1‧‧‧ first grayscale value

G2‧‧‧ second grayscale value

G3‧‧‧ first grayscale value

G4‧‧‧ second grayscale value

During the first sub-picture period of T1‧‧‧

During the second sub-picture period of T2‧‧‧

S110~S130‧‧‧Steps

FIG. 1 is a flow chart showing a control method of a display according to an embodiment of the invention.

2 is a block diagram of a system of a display in accordance with an embodiment of the present invention.

FIG. 3A is a schematic diagram showing the display setting a grayscale value of a color.

FIG. 3B illustrates an embodiment of a grayscale value corresponding to a color of a picture material during different sub-pictures.

FIG. 3C illustrates another embodiment of a grayscale value corresponding to a color of a picture material during different sub-pictures.

The following is a detailed description of the embodiments, and the examples are only used for The description is not intended to limit the scope of the invention as claimed.

Referring to FIGS. 1 to 2, FIG. 1 is a flow chart showing a control method of a display according to an embodiment of the present invention, and FIG. 2 is a system block diagram of a display 100 according to an embodiment of the invention. In FIG. 2, the display 100 includes a control module 101, a light source module 102, and a display panel 103. The display 100 can display a frame in a frame period. This picture may include a plurality of sub-pictures of different colors, such as a red sub-picture, a green sub-picture, and a blue sub-picture. These different color sub-pictures are respectively displayed during a plurality of sub-picture periods during the picture. That is to say, the number of these sub-pictures coincides with the number of sub-picture periods.

If the picture includes a plurality of sub-pictures of a single color, such as a blue sub-picture, these blue sub-pictures may be displayed during a plurality of sub-pictures during the picture, and so on. Whether it is a single color or multiple sub-pictures of different colors, the intensity of the output of these sub-pictures is represented by the color gray scale value, from 0 to 255. The larger the value, the stronger the output light intensity.

In the present embodiment, in order to adjust the light intensity output by the sub-picture, the gray scale value of one of the colors of the display 100 may be set in advance, as shown in step S110 of FIG. For example, set the light intensity output by the blue sub-picture to be half of the original output value, or set the light intensity output by the green sub-picture to be half of the original output value, or set the light intensity output by the red sub-picture to be half of the original output value, etc. Wait. When the output light intensity is half of the original output value, the color grayscale value corresponding to the light intensity is also reduced by about half, thereby controlling the display device 100 to display the sub-picture brightness of the color. The set value of this color can be output The value is dynamically adjusted or is a fixed value.

In FIG. 2, the control module 101 is configured to set a grayscale value of a color of the display 100, and receive a picture data FD during a picture period, as shown in step S120 of FIG. In addition, the control module 101 can also control the color in the picture data FD to display a first gray level value during the plurality of first sub-pictures according to the set value of the color, and display the plurality of second gray screen values during the plurality of second sub-picture periods. A second gray scale value is as shown in step S130 of FIG.

Referring to FIG. 2 , the light source module 102 is configured to provide a light source to the display panel 103 . The light source module 102 can include a red light source, a green light source, and a blue light source. The red light source is used to provide the optical signal required during the red sub-picture, the green light source is used to provide the optical signal required during the green sub-picture, and the blue light source is used to provide the optical signal required during the blue sub-picture. The light source may be composed of a plurality of corresponding red light emitting diodes, green light emitting diodes, and blue light emitting diodes, and the control module 101 may be based on the number or type of color light sources provided by the light source module 102 (for example, R , G, B or the like) provides a corresponding number of driving signals DS to respectively control the red light emitting diode, the green light emitting diode, the blue light emitting diode or the other color light emitting diode.

Specifically, when the display 100 receives a picture data FD, the control module 101 can control the light source module 102 to generate an optical signal corresponding to the color sub-picture according to a set value of a color, so that the picture data FD The color displays a first grayscale value during the plurality of first sub-pictures and a second grayscale value during the plurality of second sub-pictures.

On the other hand, in addition to adjusting the brightness of the light source, the control module 101 can also adjust the transmittance of the display panel 103. Specifically, when the display 100 receives a screen data FD, the control module 101 can generate a display data DB including red sub-picture data, green sub-picture data, and blue sub-picture data according to the screen data FD to the display panel 103. The display panel 103 displays red sub-picture data, green sub-picture data, and blue sub-picture data during the red sub-picture period, the green sub-picture period, and the blue dice picture period. The display data DB can display a picture by converting the optical signal into an image color signal by using the color filter and/or the liquid crystal layer in the display panel 103. In addition, the control module 101 can control the transmittance of the color corresponding to the display panel 103 according to a set value of a color, for example, controlling the deflection angle of the liquid crystal molecules to change the grayscale value of the image color, so that the image data FD is The color displays a first grayscale value during the plurality of first sub-pictures and a second grayscale value during the plurality of second sub-pictures.

According to the above, the display 100 can change the grayscale value of a color according to the setting of the user, and can adjust the grayscale value of the color of the picture data FD during the corresponding sub-picture period by the allocation of the time domain. On the one hand, it is difficult for the human eye to distinguish the grayscale value change from the sub-picture that generates the visual persistence to avoid the problem of color shift. On the other hand, the light intensity of the display 100 corresponding to the color output is weakened to reduce the human eye. hurt.

Please refer to FIG. 3A-3C, wherein FIG. 3A is a schematic diagram showing setting a grayscale value of a color. FIG. 3B illustrates an embodiment of a grayscale value corresponding to a color of a picture material during different sub-pictures. Figure 3C shows a picture of the data is not Another embodiment of the grayscale value corresponding to the color during the same sub-picture.

In Fig. 3A, taking the blue light source as an example, when the light intensity outputted by the blue sub-picture is set to be half of the original output value (for example, 255), the color gray scale value corresponding to the light intensity is also reduced to half, for example, The set value G of this color is 128. Next, in FIG. 3B, according to the set value G of the color, the color in the control screen material displays a first grayscale value G1 during the plurality of first sub-screen periods T1, and during the plurality of second sub-picture periods. T2 displays a second grayscale value G2. The first sub-picture period T1 and the second sub-picture period T2 are sequentially arranged in the order of the time domain, and the first sub-picture period T1 and the second sub-picture period T2 may be the same number or different numbers. The first grayscale value G1 is smaller than the set value G of the color (for example, blue light), and the second grayscale value G2 is greater than the set value G of the color.

As shown in FIG. 3B, the first grayscale value G1 is displayed during the first sub-screen period T1, and the first grayscale value G1 is, for example, 0. Thereafter, the second grayscale value G2 is displayed during the second sub-screen period T2, The second gray scale value G2 is, for example, 255, and so on, and the second gray scale value G2 is greater than the first gray scale value G1. The first sub-picture period T1 is equal to the second sub-picture period T2. When the number of the first sub-picture period T1 and the second sub-picture period T2 are both N, the sum of the total number of first gray scale values G1 and the second gray scale values G2 divided by the total number of sub-picture periods (2N) is equal to (G1+G2)*N/2N, that is, the average grayscale value of the color is (G1+G2)/2. In this embodiment, the average grayscale value of the color is equal to the set value G of the color to reduce the light intensity corresponding to the color when the image is output. Taking blue light as an example, the average grayscale value of blue light is about 128, which is half of the original output value (255) to reduce the damage of blue light to the eyes.

Next, as shown in FIG. 3C, the first grayscale value G3 is displayed during the first sub-screen period T1, and the first grayscale value G1 is, for example, 64. Thereafter, the second grayscale value G4 is displayed during the second sub-screen period T2. The second grayscale value G4 is, for example, 192, and so on, and the second grayscale value G4 is greater than the first grayscale value G3. The second sub-picture period T2 is equal to the first sub-picture period T1. When the number of the first sub-picture period T1 and the second sub-picture period T2 is N, the sum of the first gray scale values G3 and the second gray scale values G4 divided by the total number of sub-picture periods (2N) is equal to ( G3+G4)*N/2N, that is, the average grayscale value of the color is (G3+G4)/2. In this embodiment, the average grayscale value of the color is equal to the set value G of the color to reduce the light intensity corresponding to the color when the image is output. Taking blue light as an example, the average gray level value of blue light can still be maintained at about 128, which is half of the original output value (255) to reduce the damage of blue light to the eyes.

The control method of the display disclosed in the above embodiments of the present invention adjusts the grayscale value of a color of the picture data in the corresponding sub-picture period by the allocation of the time domain to reduce the light intensity corresponding to the color when the image is output. In addition, due to the persistence of image vision, it is difficult for the human eye to perceive the change of the grayscale value corresponding to the color when the image is output to avoid the problem of color shift.

In conclusion, the present invention has been disclosed in the above preferred embodiments, and is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

S110~S130‧‧‧Steps

Claims (8)

A display control method includes: setting a grayscale value of a color of the display; receiving a picture data during a picture period, where the picture period includes a plurality of first sub-picture periods and a plurality of second sub-picture periods, The first sub-picture period and the second sub-picture periods are sequentially configured; and according to the set value of the color, the color in the picture data is controlled to display a first gray level value during the first sub-pictures, And displaying a second grayscale value during the second sub-pictures, wherein the first grayscale values are smaller than the set value of the color, the second grayscale values are greater than the set value of the color, and the screen period The average of the first grayscale value and the second grayscale value is equal to the set value of the color. The control method of the display of claim 1, wherein the color is blue light. The control method of the display of claim 1, wherein the number of the first sub-picture periods is equal to the number of the second sub-picture periods. The control method of the display of claim 1, wherein the number of the first sub-picture periods is greater or smaller than the number of the second sub-picture periods. The control method of the display of claim 1, wherein the grayscale value of the color of the display is set by a light source control module, and the brightness of a light source is sequentially adjusted according to the set value of the color. The control method of the display of claim 5, wherein the light source is a light-emitting diode corresponding to a color. The control method of the display of claim 1, wherein the grayscale value of the color of the display is set by a display panel control module, and a display panel is sequentially adjusted according to the set value of the color. The transparency of the color. The control method of the display of claim 7, wherein the display panel is a liquid crystal display panel comprising a color filter.