TW202422183A - Display adjustment method and an electronic device - Google Patents

Abstract

The disclosure provides a display adjustment method and an electronic device. The method includes: obtaining a user's gaze point on a display, wherein the display includes a plurality of pixels, and each pixel has a preset brightness; reducing a brightness of each pixel based on a distance between the gaze point and each pixel; determining a gaze area including the gaze point; obtaining a plurality of specific pixels located in the gaze area from the plurality of pixels; and restoring the brightness of each specific pixel to the preset brightness.

Description

Display adjustment method and electronic device

The present invention relates to a display technology, and in particular to a display adjustment method and an electronic device.

Currently, all monitors on the market (such as laptops and/or stand-alone monitors) have their own monitor power saving mechanisms. For example, some laptop monitors can reduce the backlight brightness of the screen to save power when the battery power falls within a certain range. In addition, some manufacturers' stand-alone monitor products can also track the position of the user's eyes with a camera and automatically switch the monitor screen to sleep mode when it is determined that the user's eyes are far away from the monitor.

However, if the conventional power saving mechanism reduces the backlight brightness of the screen when the user is using the display, the viewing quality of the user may be affected because the picture is not bright enough.

In view of this, the present invention provides a display adjustment method and an electronic device, which can be used to solve the above technical problems.

The present invention provides a display adjustment method suitable for an electronic device, comprising: obtaining a user's focus point on a display, wherein the display includes a plurality of pixels, and each pixel has a preset brightness; reducing the brightness of each pixel based on the distance between the focus point and each pixel; determining a focus area including the focus point on the display; obtaining a plurality of specific pixels located in the focus area from the plurality of pixels; and restoring the brightness of each specific pixel to the preset brightness.

The present invention provides an electronic device, including a storage circuit and a processor. The storage circuit stores a program code. The processor is coupled to the storage circuit and accesses the program code to execute: obtaining a user's focus point on a display, wherein the display includes a plurality of pixels, and each pixel has a preset brightness; reducing the brightness of each pixel based on the distance between the focus point and each pixel; determining a focus area on the display including the focus point; obtaining a plurality of specific pixels located in the focus area from the plurality of pixels; and restoring the brightness of each specific pixel to the preset brightness.

Please refer to FIG. 1, which is a schematic diagram of an electronic device and a display according to an embodiment of the present invention. In FIG. 1, the electronic device 11 is, for example, various smart devices and/or electronic devices, and the display 12 is, for example, a screen or other display device connected to the electronic device 11. In one embodiment, the display 12 is, for example, an external screen connected to the electronic device 11 (for example, a screen connected to a computer host). In another embodiment, the display 12 can also be a screen built into the electronic device 11 (for example, a screen of a laptop computer itself), but is not limited thereto.

In FIG1 , the electronic device 11 includes a storage circuit 112 and a processor 114. The storage circuit 112 is, for example, any type of fixed or removable random access memory (RAM), read-only memory (ROM), flash memory, hard disk or other similar devices or a combination of these devices, and can be used to record multiple program codes or modules.

The processor 114 is coupled to the storage circuit 112 and may be a general purpose processor, a special purpose processor, a conventional processor, a digital signal processor, a plurality of microprocessors, one or more microprocessors incorporating a digital signal processor core, a controller, a microcontroller, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), any other type of integrated circuit, a state machine, an Advanced RISC Machine (ARM) based processor, and the like.

In different embodiments, the display 12 may be any display device with a function of displaying pictures/images. In the embodiment of the present invention, the display 12 is, for example, an organic light emitting diode (OLED) display with a 3D look up table (LUT), or a mini-LED display, but is not limited thereto.

In FIG1 , the display 12 may have a built-in eye tracking circuit 121. In other embodiments, the eye tracking circuit 121 may also be an eye tracking device externally connected to the display 12 and/or the electronic device 11, but is not limited thereto.

Please refer to FIG. 2 , which is a schematic diagram of eye tracking of a user's eyes according to an embodiment of the present invention. In FIG. 2 , the eye tracking circuit 121 can be used, for example, to track the eyes 299 of the user of the display 12 to obtain the 3D coordinates of the eyes 299. In one embodiment, the eye tracking circuit 121 can have a stereo camera, which can be used to take images of the user's eyes 299 and obtain the 3D coordinates of the eyes 299 by analyzing these images, but is not limited thereto.

In one embodiment, the processor 114 may obtain the 3D coordinates of the user's eyes from the eye tracking circuit 121, and convert the 3D coordinates into the user's gaze point G1 on the display 12 based on relevant known techniques.

In the embodiment of the present invention, the processor 114 can determine the attention area R1 on the display 12 based on the attention point G1, and accordingly reduce the brightness of the display area R2 outside the attention area R1. In this way, the power saving effect can be achieved without affecting the user's viewing of the display 12. The relevant details will be further explained with reference to FIG. 3.

In an embodiment of the present invention, the processor 114 can access the modules and program codes recorded in the storage circuit 112 to implement the display adjustment method proposed by the present invention, the details of which are described as follows.

Please refer to FIG3, which is a flow chart of a display adjustment method according to an embodiment of the present invention. The method of this embodiment can be executed by the electronic device 100 of FIG1. The following is a description of the details of each step of FIG3 with reference to the components shown in FIG1.

First, in step S310, the processor 114 obtains the user's gaze point G1 on the display 12. In the embodiment of the present invention, the display 12 has a plurality of pixels. Assuming that the resolution of the display 12 is WxH, there will be WxH pixels on the display 12. For example, if the resolution of the display 12 is 1920x1080 (i.e., W is 1920 and H is 1080), the display 12 will have 1920x1080 pixels.

In an embodiment of the present invention, each pixel has a preset brightness, wherein the preset brightness can be adjusted by a user through a control interface of the display 12. For example, the control interface of the display 12 can include a display brightness control bar, and the user can adjust the display brightness setting value of the display 12 by adjusting the display brightness control bar.

In other embodiments, the display 12 may also have the function of automatically adjusting the display brightness according to the ambient light. In this case, the default brightness of each pixel is, for example, a display brightness setting value automatically determined by the display 12 in response to the current ambient light intensity.

In the embodiment of the present invention, the default brightness of each pixel is, for example, a display brightness corresponding to a display brightness setting value selected by a user, or a display brightness corresponding to a display brightness setting value automatically determined by the display 12, but is not limited thereto.

Next, in step S320, the processor 114 reduces the brightness of each pixel based on the distance between the viewpoint G1 and each pixel.

In one embodiment, for a certain pixel on the display 12, the brightness reduction amplitude of the pixel may be positively correlated with the distance between the pixel and the focus point G1. That is, the greater the distance between the pixel and the focus point G1, the greater the brightness reduction amplitude of the pixel may be; the smaller the distance between the pixel and the focus point G1, the smaller the brightness reduction amplitude of the pixel may be.

In one embodiment, the display 12 may include a first pixel and a second pixel, wherein the first pixel is at a first distance from the focus point G1, and the second pixel is at a second distance from the focus point G1, and the second distance is not less than the first distance. That is, the distance between the second pixel and the focus point G1 is greater than or equal to the distance between the first pixel and the focus point G1.

In one embodiment, when the processor 114 reduces the brightness of the first pixel and the second pixel, the processor 114 may reduce the brightness of the first pixel from a preset brightness to a first brightness, and reduce the brightness of the second pixel from a preset brightness to a second brightness, wherein the second brightness is not higher than the first brightness. That is, the brightness reduction amplitude of the second pixel may be not less than the brightness reduction amplitude of the first pixel.

In different embodiments, the processor 114 may use different methods to reduce the brightness of each pixel in response to different types of displays 12.

In the first embodiment, it is assumed that the display 12 is an OLED display with a 3D lookup table (ie, each pixel has the ability to emit light by itself). In this case, the processor 114 can determine the brightness adjustment factor of each pixel based on the distance between the viewpoint G1 and each pixel.

Taking the first pixel as an example, assuming that the coordinates of the first pixel on the display 12 are ( , ), and the coordinates of the viewpoint G1 on the display 12 are represented by ( , ). In this case, the brightness adjustment factor of the first pixel can be expressed as: Formula (1), where N is a compensation constant. In different embodiments, N can be any value selected according to the needs of the designer. In one embodiment, N is, for example, 30, but is not limited thereto.

For other pixels on the display 12, the processor 114 can calculate corresponding brightness adjustment factors based on the above teachings, but is not limited thereto.

Afterwards, the processor 114 may reduce the brightness of each pixel based on the brightness adjustment factor of each pixel and the 3D lookup table.

In one embodiment, the processor 114 may find a first input RGB brightness combination corresponding to the first pixel in the 3D lookup table, wherein the first input RGB brightness combination corresponding to the first pixel may be represented as: .

Thereafter, the processor 114 adjusts the brightness factor of the first pixel (i.e., ) corrects the first input RGB brightness combination to a first output RGB brightness combination corresponding to the first pixel. In one embodiment, the first output RGB brightness combination corresponding to the first pixel is characterized by: Formula (2).

Then, the processor 114 may output the RGB brightness combination based on the first output RGB brightness combination (ie, ) sets the brightness of the first pixel. To make the above concept easier to understand, FIG. 4 is used as an additional illustration below.

Please refer to FIG. 4 , which is a 3D lookup table diagram according to an embodiment of the present invention. In FIG. 4 , according to the known usage of a 3D lookup table, assuming that the input RGB brightness combination corresponding to a certain pixel A is (70, 70, 70), then the corresponding default output RGB brightness combination is, for example, (60, 60, 60). Assuming that the input RGB brightness combination corresponding to a certain pixel B is (85, 90, 70), then the corresponding default output RGB brightness combination is, for example, (75, 80, 60).

However, in the embodiment of the present invention, it is assumed that the first input RGB brightness combination corresponding to the first pixel is (70, 70, 70) (ie, ), the processor 114 may convert (70, 70, 70) and the corresponding Substitute into formula (2) to obtain the corresponding In this case, the processor 114 will not set the brightness of the first pixel with (60, 60, 60) which originally corresponds to (70, 70, 70) in FIG. 4, but will use the brightness obtained based on equation (2) Sets the brightness of the first pixel.

For another example, assume that the first input RGB brightness combination corresponding to the first pixel is (85, 90, 70) (ie, ), the processor 114 may convert (85, 90, 70) and the corresponding Substitute into formula (2) to obtain the corresponding In this case, the processor 114 will not set the brightness of the first pixel to (75, 80, 60) which originally corresponds to (85, 90, 70) in FIG. 4, but will use the brightness obtained based on equation (2) Sets the brightness of the first pixel.

In an embodiment of the present invention, the processor 114 can calculate the corresponding pixel of each pixel in the display 12 based on the above teachings. , and the brightness of each pixel is set accordingly. In this way, the brightness of each pixel in the display 12 can be reduced, but it is not limited to this.

In the second embodiment, it is assumed that the display 12 is a Mini-LED display (i.e., each pixel does not have self-luminous ability and needs to emit light through a backlight module corresponding to each pixel). In this case, the processor 114 can determine a backlight adjustment factor for each pixel based on the distance between the viewpoint G1 and each pixel.

Taking the first pixel as an example, assuming that the coordinates of the first pixel on the display 12 are ( , ), and the coordinates of the viewpoint G1 on the display 12 are represented by ( , ). In this case, the backlight adjustment factor of the first pixel is represented by: Formula (3), but is not limited thereto.

For other pixels on the display 12, the processor 114 can calculate corresponding backlight adjustment factors based on the above teachings, but is not limited thereto.

Thereafter, the processor 114 may determine a reference backlight value for each pixel based on the backlight adjustment factor of each pixel, the maximum brightness of the display 12, and the minimum brightness of the display 12.

In one embodiment, the reference backlight value of the first pixel can be represented as: Formula (4), where BMin is the minimum brightness of the display 12, and BMax is the maximum brightness of the display 12.

In an embodiment of the present invention, the processor 114 can calculate the reference backlight value corresponding to each pixel in the display 12 based on the above teachings. In addition, since the content of equation (4) involves logarithmic operations, the brightness of each pixel can be reduced to provide a less glaring visual experience.

Afterwards, the processor 114 may reduce the backlight intensity of each pixel from the preset backlight value corresponding to the preset brightness to the corresponding reference backlight value. In the second embodiment, the processor 114 may, for example, control the backlight module corresponding to each pixel to change from emitting light corresponding to the preset brightness to emitting light corresponding to the reference backlight value of each pixel. In this way, the effect of reducing the brightness of each pixel in the display 12 may be achieved, but it is not limited to this.

2 and 3 again, after reducing the brightness of each pixel in step S320, the processor 114 executes step S330 to determine the attention region R1 including the attention point G1 on the display 12. In one embodiment, the processor 114 can expand outward from the attention point G1 to form a geometric region as the attention region R1.

In FIG. 2 , the geometric region is, for example, a rectangular region with a fixed height (represented by H1) and width (represented by W1). In this case, the coordinates of the upper left corner of the focus region R1 can be represented, for example, as ( -0.5*W1, +0.5*H1), the coordinates of the upper right corner of the focus area R1 can be represented as ( +0.5*W1, +0.5*H1), the coordinates of the lower left corner of the focus area R1 can be represented as ( -0.5*W1, -0.5*H1), the coordinates of the lower right corner of the focus area R1 can be represented as ( +0.5*W1, -0.5*H1), but is not limited thereto.

In other embodiments, the attention region R1 can be adjusted to any size/shape according to the designer's needs. In addition, when the attention point G1 is closer to the edge of the display 12, so that the attention region R1 cannot be presented in the state of FIG. 2, the processor 114 can reduce the size of the attention region R1 accordingly, but is not limited thereto.

Next, in step S340, the processor 114 obtains a plurality of specific pixels located in the attention region R1 from the plurality of pixels. In one embodiment, the processor 114 may regard all pixels located in the attention region R1 on the display 12 as belonging to the specific pixels, but is not limited thereto.

In step S350, the processor 114 restores the brightness of each specific pixel to the default brightness. That is, although the brightness of each specific pixel has been reduced from the default brightness in step S320, the processor 114 restores the brightness of each specific pixel (i.e., the pixel located in the attention area R1) to the default brightness in step S350. In this way, the user can still clearly see the display screen located in the attention area R1. In addition, since the display area R2 located outside the attention area R1 has been adjusted to a lower brightness, the effect of power saving can be achieved.

In the first embodiment (i.e., the display 12 is an OLED display), when the processor 114 executes step S350 on one of the above-mentioned specific pixels (hereinafter referred to as the first specific pixel), it can be configured to: find the second input RGB brightness combination corresponding to the first specific pixel in the 3D lookup table; obtain the default output brightness combination corresponding to the second input RGB brightness combination; and set the brightness of the first specific pixel based on the default output brightness combination.

Taking FIG. 4 as an example, assuming that the second input RGB brightness combination corresponding to the first specific pixel is (70, 70, 70), the processor 114 finds the default output brightness combination corresponding to (70, 70, 70), such as (60, 60, 60). Afterwards, the processor 114 can set the brightness of the first specific pixel based on the default output brightness combination. That is, for each specific pixel located in the attention area R1, the processor 114 can directly set the brightness of each specific pixel based on the 3D lookup table of FIG. 4, but is not limited thereto.

In the second embodiment, the processor 114 may control the backlight module corresponding to each specific pixel to change from emitting light corresponding to the reference backlight value to emitting light corresponding to the preset brightness of each specific pixel to restore the brightness of each specific pixel, but is not limited thereto.

Please refer to FIG. 5 , which is an application scenario diagram according to an embodiment of the present invention. In FIG. 5 , the attention area R1 moves as the user's attention point G1 on the display 12 moves. Through the method proposed by the present invention, the display 12 can maintain the brightness within the attention area R1 and reduce the brightness of the display area outside the attention area R1. In this way, the power saving effect can be achieved without affecting the user's viewing of the display 12.

In summary, the embodiment of the present invention can reduce the brightness of each pixel on the display after determining the user's focus point on the display. Afterwards, the embodiment of the present invention can determine the user's focus area on the display and restore the brightness of the pixels in the focus area to the corresponding preset brightness. In this way, the user can still clearly see the display screen in the focus area. In addition, since the display area outside the focus area has been adjusted to a lower brightness, the effect of power saving can be achieved.

Although the present invention has been disclosed as above by the embodiments, they are not intended to limit the present invention. Any person with ordinary knowledge in the relevant technical field can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be defined by the scope of the attached patent application.

100: electronic device 11: electronic device 112: storage circuit 114: processor 12: display 121: eye tracking circuit 299: eye G1: gaze point R1: gaze area S310~S360: steps

FIG. 1 is a schematic diagram of an electronic device and a display according to an embodiment of the present invention. FIG. 2 is a schematic diagram of eye tracking of a user's eyes according to an embodiment of the present invention. FIG. 3 is a flow chart of a display adjustment method according to an embodiment of the present invention. FIG. 4 is a 3D search representation diagram according to an embodiment of the present invention. FIG. 5 is an application scenario diagram according to an embodiment of the present invention.

S310~S360: Steps

Claims (11)

A display adjustment method, suitable for an electronic device, includes: Obtaining a user's focus point on a display, wherein the display includes a plurality of pixels and each of the pixels has a preset brightness; Reducing the brightness of each of the pixels based on the distance between the focus point and each of the pixels; Determining a focus area on the display including the focus point; Obtaining a plurality of specific pixels located in the focus area from the pixels; and Restoring the brightness of each of the specific pixels to the preset brightness. As described in claim 1, the pixels include a first pixel and a second pixel, the first pixel is at a first distance from the viewpoint, the second pixel is at a second distance from the viewpoint, the second distance is not less than the first distance, and the step of reducing the brightness of each pixel based on the distance between the viewpoint and each pixel includes: Reducing the brightness of the first pixel from the preset brightness to a first brightness, and reducing the brightness of the second pixel from the preset brightness to a second brightness, wherein the second brightness is not higher than the first brightness. The method of claim 1, wherein the display is an organic light emitting diode display having a 3D lookup table, and the step of reducing the brightness of each pixel based on the distance between the viewpoint and each pixel comprises: Determining a brightness adjustment factor for each pixel based on the distance between the viewpoint and each pixel; Reducing the brightness of each pixel based on the brightness adjustment factor of each pixel and the 3D lookup table. As described in claim 3, wherein the pixels include a first pixel, and the coordinates of the viewpoint on the display are represented by ( , ), the coordinates of the first pixel on the display are represented by ( , ), and the brightness adjustment factor of the first pixel is represented by: Where W is the width of the display, H is the height of the display, and N is the compensation constant. As described in claim 4, the 3D lookup table records multiple input RGB brightness combinations, and the step of reducing the brightness of each pixel based on the brightness adjustment factor of each pixel and the 3D lookup table includes: Finding a first input RGB brightness combination corresponding to the first pixel in the 3D lookup table; Correcting the first input RGB brightness combination to a first output RGB brightness combination corresponding to the first pixel based on the brightness adjustment factor of the first pixel; Setting the brightness of the first pixel based on the first output RGB brightness combination. The method of claim 5, wherein the first input RGB brightness combination corresponding to the first pixel is represented by , the first output RGB brightness combination corresponding to the first pixel is characterized by: . As described in claim 5, the specific pixels include a first specific pixel, and the step of restoring the brightness of each specific pixel to the default brightness includes: Finding a second input RGB brightness combination corresponding to the first specific pixel in the 3D lookup table; Obtaining a default output brightness combination corresponding to the second input RGB brightness combination; Setting the brightness of the first specific pixel based on the default output brightness combination. The method of claim 1, wherein the display is a mini LED display, and the step of reducing the brightness of each pixel based on the distance between the viewpoint and each pixel comprises: Determining a backlight adjustment factor for each pixel based on the distance between the viewpoint and each pixel; Determining a reference backlight value for each pixel based on the backlight adjustment factor for each pixel, the maximum brightness of the display, and the minimum brightness of the display; Reducing a backlight intensity of each pixel from a preset backlight value corresponding to the preset brightness to the corresponding reference backlight value. As described in claim 8, wherein the pixels include a first pixel, and the coordinates of the viewpoint on the display are represented by ( , ), the coordinates of the first pixel on the display are represented by ( , ), and the backlight adjustment factor of the first pixel is represented by: , where W is the width of the display and H is the height of the display. The method of claim 9, wherein the reference backlight value of the first pixel is characterized by: , where BMin is the minimum brightness of the display and BMax is the maximum brightness of the display. An electronic device includes: A storage circuit storing a program code; A processor coupled to the storage circuit and accessing the program code to execute: Obtaining a user's focus point on a display, wherein the display includes a plurality of pixels and each of the pixels has a preset brightness; Reducing the brightness of each of the pixels based on the distance between the focus point and each of the pixels; Determining a focus area on the display including the focus point; Obtaining a plurality of specific pixels located in the focus area from the pixels; and Restoring the brightness of each of the specific pixels to the preset brightness.

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