CN111983803A - Eyeball tracking module and electronic equipment - Google Patents

Abstract

The invention relates to an eye tracking module and an electronic device. The eye tracking module includes: a mirror frame, the mirror frame is formed by connecting a first long side, a first short side, a second long side and a second short side in sequence; a receiving component is arranged on the second long side; and a first light-emitting unit, a second light-emitting unit, a third light-emitting unit and a fourth light-emitting unit, the first light-emitting unit and the second light-emitting unit are arranged on the first long side, and the first light-emitting unit The unit and the second light-emitting unit are located on both sides of the orthographic projection of the receiving component on the first long side, and the third light-emitting unit and the fourth light-emitting unit are respectively arranged on the first short side and the part of the second short side away from the first long side. The above-mentioned eye tracking module can obtain the position information of the eyeball by obtaining the position of the light received by the receiving component, which greatly simplifies the tracking process of the eye tracking module, shortens the time required for tracking, and improves the user experience.

Description

Eye Tracking Modules and Electronic Devices

technical field

The invention relates to the technical field of virtual reality equipment, in particular to an eye tracking module and an electronic device.

Background technique

In virtual imaging electronic devices such as Virtual Reality (VR) devices, Augmented Reality (AR) devices, and Mediated Reality (MR) devices, it is usually necessary to configure an eye tracking module. In order to track the movement of the human eyeball, and change the position and angle of the image according to the movement of the human eyeball, the user can feel immersive.

However, the traditional eye tracking module has a complicated process of tracking human eye movements, which results in a long tracking process and poor user experience.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide an eye-tracking module and an electronic device in order to solve the problems that the traditional eye-tracking module has a long tracking process and poor user experience.

An eye tracking module, comprising:

a mirror frame, the mirror frame is formed by connecting a first long side, a first short side, a second long side and a second short side in sequence;

a receiving assembly, disposed on the second long side; and

a first light-emitting unit, a second light-emitting unit, a third light-emitting unit and a fourth light-emitting unit, the first light-emitting unit and the second light-emitting unit are disposed on the first long side, and the first light-emitting unit and the second light-emitting unit is located on both sides of the orthographic projection of the receiving component on the first long side, the third light-emitting unit and the fourth light-emitting unit are respectively arranged on the first short side and the The second short side is remote from the portion of the first long side.

In one embodiment, the first long side has a vertical line passing through the geometric center of the receiving component, and the first light-emitting units and the second light-emitting units are axially symmetrically distributed with respect to the vertical line.

In one embodiment, the first long side has a vertical line passing through the geometric center of the receiving component, and the third light-emitting units and the fourth light-emitting units are distributed axially symmetrically with respect to the vertical line.

In one of the embodiments, the receiving component is disposed at the midpoint of the second long side.

In one embodiment, the distance between the geometric centers of the first light-emitting unit and the second light-emitting unit is 25.6 mm±5%; and/or

The distance between the third light-emitting unit and the geometric center of the fourth light-emitting unit is 47mm±5%; and/or

The vertical distance from the geometric center of the receiving component to the connecting line between the geometric centers of the first light-emitting unit and the second light-emitting unit is 35.5mm±5%; and/or

The vertical distances from the geometric center of the third light-emitting unit and the fourth light-emitting unit to the first long side are both 24.4±5%.

In one embodiment, the receiving component includes a mask layer and a photosensitive element, the mask layer is formed with a light-transmitting pattern, and the light-transmitting pattern is used to adjust the light entering the receiving component, so that the light Can be imaged on the photosensitive element.

In one embodiment, the receiving component has a receiving surface, and the receiving surface is used for receiving the light reflected by the eyeball, and the shortest distance from the receiving surface to the eyeball is 8.09 mm±5%.

In one embodiment, there are two mirror frames, the two mirror frames are connected to each other, a boundary line is formed between the two mirror frames, and the two mirror frames are in an axisymmetric structure with respect to the boundary line.

In one of the embodiments, the distance between the geometric centers of the two receiving assemblies is 66mm±5%; and/or

The distance between the geometric centers of the two third light-emitting units is 23mm±5%; and/or

The two first light-emitting units are located outside the two second light-emitting units, and the distance between the geometric centers of the two second light-emitting units is 40.4 mm±5%.

An electronic device includes a display and the eye tracking module according to any one of the above embodiments, the display can adjust the displayed image according to the information obtained by the eye tracking module.

In the above-mentioned eye tracking module, when performing eye tracking, the mirror frame is placed in front of the eyeball, and the first long side, the first short side, the second long side and the second short side are arranged around the eyeball. The four light-emitting units emit light toward the eyeball, and the positions of the four light-emitting units and the receiving assembly are reasonably configured. Therefore, when the frame is placed in front of the eyeball, the light emitted by the four light-emitting units strikes the eyeball from four different directions respectively, and the position of the eyeball is tracked from the four different directions of the eyeball. When the eyeball moves in a certain direction, the light emitted by the light-emitting unit located in this direction will be reflected by the eyeball and then received by the receiving component, while the light emitted by the light-emitting unit in other directions will hit the white of the eye and cannot be reflected by the eyeball and reach the receiving component. . And since the light emitted by different light-emitting units strikes the eyeball from different directions, the light emitted by different light-emitting units will also enter the receiving assembly from different directions after being reflected by the eyeball and reach different positions of the receiving assembly. By obtaining the position of the light received by the receiving component, the position information of the eyeball can be obtained, which greatly simplifies the tracking process of the eye tracking module, shortens the time required for tracking, and improves the user experience.

Description of drawings

1 is a schematic diagram of an eye tracking module in some embodiments of the present application;

2 is a schematic diagram of an eye-tracking module placed in front of the eye in some embodiments of the present application;

3 is a schematic diagram of a receiving component in some embodiments of the present application;

FIG. 4 is a schematic diagram of the principle of obtaining the eye position by the eye tracking module in some embodiments of the present application.

110, mirror frame; 111, first light-emitting unit; 112, second light-emitting unit; 113, third light-emitting unit; 114, fourth light-emitting unit; 115, first long side; 116, second long side; 117, first short side; 118, second short side; 120, receiving component; 121, mask layer; 122, receiving surface; 123, photosensitive element; 124, connecting substrate; 130, sight space; 131, center point; 140 , Frames; 150, Eyeballs.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Back, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations of the invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or an intervening element may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

Please refer to FIGS. 1 and 2. FIG. 1 shows a schematic diagram of an eye tracking module in some embodiments of the present application, and FIG. 2 shows a schematic diagram of an eye tracking module placed in front of the eyeball 150 in some embodiments of the present application. The eye-tracking module includes a frame 110 and a frame 140 that are connected to each other. The frame 110 is used to be installed on the bridge of the user's nose, and the frame 140 is used to install the user's ear, so that the eye-tracking module can be placed in front of the user's eyeballs 150 . The eye tracking module further includes a light emitting unit and a receiving component 120. The light emitting unit is used for emitting light toward the user's eyeball 150, and the receiving component 120 is used for receiving the light reflected by the user's eyeball 150, and obtains the position of the eyeball 150 according to the received light. , to achieve eye 150 tracking function. Of course, in order to prevent the light emitted by the light emitting unit from affecting the user's visual experience, the light emitted by the light emitting unit should be invisible light. Visible infrared light.

Specifically, in some embodiments, the frame 110 includes a first long side 115 , a second long side 116 , a first short side 117 and a second short side 118 , and the first long side 115 , the first short side 117 , the The two long sides 116 and the second short sides 118 are connected to each other in sequence, and the first long side 115 , the first short side 117 , the second long side 116 and the second short side 118 are surrounded to form a line of sight space 130 . When the eye tracking module is placed in front of the eyeball 150 , the sight of the eyeball 150 passes through the sight space 130 , that is, the first long side 115 , the first short side 117 , the second long side 116 and the second short side 118 are arranged around the eyeball 150 . The sight space 130 has a center point 131 . Referring to FIG. 2 , when the eyeball 150 looks straight, that is, when the eyeball 150 faces straight ahead, the eyeball 150 passes through the center point 131 . It should be noted that the center point 131 of the sight space 130 may not be the geometric center of the mirror frame 110 .

The light-emitting unit of the eye tracking module includes a first light-emitting unit 111 , a second light-emitting unit 112 , a third light-emitting unit 113 and a fourth light-emitting unit 114 , and the receiving component 120 is disposed on the second long side 116 . The first light emitting unit 111 and the second light emitting unit 112 are disposed on the first long side 115 , and the first light emitting unit 111 and the second light emitting unit 112 are located on two sides of the orthographic projection of the receiving element 120 on the first long side 115 . The third light emitting unit 113 is disposed at a portion of the first short side 117 away from the first long side 115 . Specifically, in some embodiments, the first short side 117 has a vertical line passing through the center point 131 , namely the vertical line A shown in FIG. 1 , and the third light-emitting unit 113 is disposed between the vertical line A and the first short side 117 The intersection point of , to the part between the connection of the first short side 117 and the second long side 116 . The fourth light emitting unit 114 is disposed on the part of the second short side 118 away from the first long side 115 , that is, the fourth light emitting unit 114 is disposed from the intersection of the vertical line A and the second short side 118 to the second short side 118 and the second long side 118 . The portion between the junctions of the edges 116. In some embodiments, the extending direction of the first long side 115 is parallel to the extending direction of the second long side 116 , and the extending direction of the first short side 117 is parallel to the extending direction of the second short side 118 .

It can be understood that the light-emitting surfaces of the first light-emitting unit 111 , the second light-emitting unit 112 , the third light-emitting unit 113 and the fourth light-emitting unit 114 and the receiving surface 122 of the receiving component 120 should face the same side, so that the first light-emitting unit 111 The light emitted by the light emitting surfaces of the second light emitting unit 112 , the third light emitting unit 113 and the fourth light emitting unit 114 can be received by the receiving surface 122 of the receiving component 120 after being reflected by the eyeball 150 . Therefore, in some embodiments, the first light emitting unit 111 , the second light emitting unit 112 , the third light emitting unit 113 , the fourth light emitting unit 114 and the receiving component 120 are all disposed on the side of the frame 110 facing the eyeball 150 . Of course, in other embodiments, the first light-emitting unit 111 , the second light-emitting unit 112 , the third light-emitting unit 113 , the fourth light-emitting unit 114 and the receiving component 120 may also be disposed on the inner side or the outer side of the frame 110 , as long as each The light-emitting surface of the light-emitting unit and the receiving surface 122 of the receiving component 120 can be directed to the side where the eyeball 150 is located.

Further, in some embodiments, the first long side 115 has a vertical line passing through the center point 131 , namely the vertical line B shown in FIG. 1 , the receiving component 120 is disposed on the vertical line B, the first light-emitting unit 111 and The second light emitting units 112 are axially symmetrically distributed with respect to the vertical line B, and the vertical distances from the third light emitting unit 113 and the fourth light emitting unit 114 to the vertical line B are equal. It should be noted that the vertical line A and the vertical line B are virtual straight lines drawn for convenience in describing the relative positional relationship between the light emitting units and the receiving components 120 .

Further, in some embodiments, the receiving component 120 is disposed at the midpoint of the second long side 116 , the vertical line A passes through the midpoint of the first long side 115 and the second long side 116 , and the vertical line B passes through the first long side 115 and the second long side 116 . The midpoint of the short side 117 and the second short side 118 . At this time, the shortest distances from the first light emitting unit 111 and the second light emitting unit 112 to the midpoint of the first long side 115 are the same, and the third light emitting unit 113 and the fourth light emitting unit 114 are axially symmetrical about the vertical line B. It should be noted that the shape of the mirror frame 110 is not limited. For example, in some embodiments, the adjacent two sides of the mirror frame 110 may have rounded transitions, and between the first long side 115 and the second long side 116, the first short side The side 117 and the second short side 118 may not be parallel to each other. And when the shape of the mirror frame 110 changes, the position of the center point 131 of the sight space 130 may also change, that is, the vertical line A may not pass through the midpoint of the first short side 117 and the second short side 118, and the vertical line B may not pass through the first short side 117 and the second short side 118. The midpoint of a long side 115 and the second long side 116 only needs the relative positional relationship between the first light-emitting unit 111 , the second light-emitting unit 112 , the third light-emitting unit 113 , the fourth light-emitting unit 114 and the receiving component 120 and the center point 131 Just keep it the same.

It can be understood that the first light-emitting unit 111 and the second light-emitting unit 112 are distributed axially symmetrically with respect to the vertical line B, and the third light-emitting unit 113 and the fourth light-emitting unit 114 are distributed axially symmetrically with respect to the vertical line B. When the 110 is placed in front of the eyeball 150, the first light-emitting unit 111 and the second light-emitting unit 112 are symmetrically distributed on both sides of the eyeball 150, and the third light-emitting unit 113 and the fourth light-emitting unit 114 are symmetrically distributed on both sides of the eyeball 150. The light emitted by a light emitting unit 111 and the second light emitting unit 112 can be symmetrically distributed in the receiving component 120 after being reflected by the eyeball 150 , and the light emitted by the third light emitting unit 113 and the fourth light emitting unit 114 can be symmetrically distributed in the receiving component 120 after being reflected by the eyeball 150 . in the receiving component 120, so that the receiving component 120 can obtain the position of the eyeball 150 more accurately.

Referring to FIG. 3 together, FIG. 3 shows a schematic diagram of the receiving component 120 in some embodiments of the present application. Specifically, in some embodiments, the receiving assembly 120 includes a photomask layer 121 , a photosensitive element 123 and a connecting substrate 124 . The connection base material 124 may be a printed circuit board (PCB) or a flexible circuit board (FPC), and a connection circuit is provided on the connection base material 124 . The photosensitive element 123 can be a charge coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS Sensor). The photosensitive element 123 is used to convert the received light signal into an electrical signal and output the electrical signal through the connection substrate 124 . The eye tracking module may further include a processing module (not shown in the figure), and the processing module is configured to perform arithmetic analysis on the electrical signal output by the photosensitive element 123 to obtain the position information of the eyeball 150 .

Further, the mask layer 121 is disposed on the side of the photosensitive element 123 away from the connecting substrate 124 and covers the photosensitive area of the photosensitive element 123 . The mask layer 121 is formed with a light-transmitting area (not shown in the figure) on the receiving surface 122 . The light enters the receiving component 120 from the light-transmitting area of the receiving surface 122 and reaches the photosensitive element 123 for imaging, while the remaining areas of the receiving surface 122 are formed. opaque. The light-transmitting area forms a light-transmitting pattern, and the light-transmitting pattern is used to adjust the light entering the receiving component 120 so that the light can be imaged on the photosensitive element 123 . For example, the light-transmitting pattern includes a plurality of diffraction slits, and the area of the diffraction front gradually decreases in the direction in which the geometric center of the receiving surface 122 points to the edge of the receiving surface 122 . Therefore, the light rays reflected by the eyeball 150 and incident on different parts of the receiving surface 122 can be diffracted independently, and the brightness of the light passing through the middle area of the receiving surface 122 is high, which can ensure that the light passes through the receiving surface 122 and reaches the photosensitive element 123, the light has high uniformity and sufficient brightness for imaging, which improves the imaging quality of the light, thereby improving the tracking accuracy of the eyeball 150 by the eye tracking module. Of course, the pattern of the light transmission pattern is not limited, as long as the light incident on the receiving surface 122 can be adjusted to improve the imaging quality of the light on the photosensitive element 123 .

It can be understood that the first light-emitting unit 111 , the second light-emitting unit 112 , the third light-emitting unit 113 and the fourth light-emitting unit 114 are all disposed in different directions of the receiving assembly 120 , and the first light-emitting unit 111 , the second light-emitting unit 114 112, the light emitted by any one of the third light-emitting unit 113 and the fourth light-emitting unit 114 may be reflected by the eyeball 150 into the receiving component 120, that is, the receiving component 120 needs to have the ability to receive light incident from multiple directions . If a traditional optical system composed of a lens with refractive power is used in the receiving assembly 120 for light adjustment, due to the limited maximum angle of view of the traditional optical system, it is easy to cause the light emitted by some light-emitting units to be reflected by the eyeball 150 and cannot be reflected by the eyeball 150. The receiving component 120 receives and affects the tracking effect of the eyeball 150 . The mask layer 121 is used to adjust the light. The maximum field of view of the mask layer 121 is much larger than the field of view of the optical system formed by the lens. And the use of the fourth light-emitting unit 114 can maximize the movement of the eyeball 150 in various directions.

Referring to FIGS. 1 and 2 again, in some embodiments, there are two mirror frames 110 , the two mirror frames 110 are connected to each other, and the connection of the two mirror frames 110 forms a boundary line, such as the boundary line C shown in FIG. 1 . , the boundary line is parallel to the extending direction of the first short side 117 , and the two mirror frames 110 have an axisymmetric structure with respect to the boundary line C. Two mirror frames 110 with an axisymmetric structure are provided. When the mirror frames 110 are erected on the bridge of the user's nose, each mirror frame 110 is located in front of one of the eyeballs 150 , and the two mirror frames 110 cooperate together to obtain the position information of the user's two eyeballs 150 .

In addition, in FIG. 1, an X, Y rectangular coordinate system is established with the center point 131 of one of the mirror frames 110 as the origin, the X axis is parallel to the extending direction of the first long side 115, and the Y axis is parallel to the first short side 117. In the extension direction, the coordinate of the center point 131 of the other mirror frame 110 is (-66, 0), and the unit length of the rectangular coordinate system is 1 mm. FIG. 1 also shows the coordinates of the geometric centers of each light-emitting unit and the receiving component 120, wherein the coordinates of the two first light-emitting units 111 are: (-78.8, 18), (12.8, 18); The coordinates of the light-emitting units 112 are: (-53.2, 18), (-12.8, 18); the coordinates of the two third light-emitting units 113 are: (-44.5, -6.4), (-21.5, -6.4); The coordinates of the two fourth light-emitting units 114 are respectively: (-91.5, -6.4), (25.5, -6.4); the coordinates of the two receiving components 120 are: (-66, -17.5), (0, -17.5 respectively ).

From the coordinate values shown in FIG. 1 , in one frame 110, the distance between the geometric centers of the first light-emitting unit 111 and the second light-emitting unit 112 is 25.6 mm, and the third light-emitting unit 113 to the fourth light-emitting unit 113 emit light. The distance between the geometric centers of the units 114 is 47 mm, the vertical distance from the geometric center of the receiving component 120 to the connecting line between the geometric centers of the first light-emitting unit 111 and the second light-emitting unit 112 is 35.5 mm, and the third light-emitting unit 113 And the vertical distance from the geometric center of the fourth light-emitting unit 114 to the first long side 115 is 24.4 mm. In addition, in the embodiment shown in FIG. 1 , the geometric centers of each light-emitting unit and the receiving component 120 are located at the center of the width direction of the corresponding side of the mirror frame 110 , and the first long side 115 , the first short side 117 and the second short side The width dimension of the side 118 is equal, both are: D=2mm, and the width dimension of the second long side 116 is: E=5mm. Since the size of the receiving assembly 120 is generally larger than that of the light emitting unit, the second long side 116 with a larger width is provided to better support the receiving assembly 120 . From this, it can be deduced that the maximum distance from the center point 131 to the first long side 115 in the Y-axis direction is: F=19mm; the maximum distance from the center point 131 to the second long side 116 in the Y-axis direction is: G=20mm ; The maximum distance from the center point 131 to the first short side 117 in the X-axis direction is: H=22.5mm; the maximum distance from the center point 131 to the second short side 118 in the X-axis direction is: I=26.5mm.

Similarly, in the two mirror frames 110 , the distance between the geometric centers of the two receiving components 120 is 66 mm; the distance between the geometric centers of the two third light-emitting units 113 is 23 mm, and the distance between the two second light-emitting units 112 is 23 mm. The distance between the geometric centers is 40.4mm; part of the distance can be derived from the coordinate values shown in Figure 1, and will not be marked one by one in Figure 1.

Referring to FIG. 2 , in some embodiments, when the frame 110 is placed in front of the eyeball 150 , the surface of the frame 110 facing the eyeball 150 forms a plane, and the angle between the plane and the vertical direction is α=8 The shortest distance between the eyeball 150 and the center point 131 is 12mm, that is, the distance between the eyeglasses is 12mm; the size of the receiving component 120 in the horizontal direction is 1.1mm. The horizontal direction is the line-of-sight direction when the eyeball 150 is looking straight, and the vertical direction is perpendicular to the horizontal direction. Then, when the maximum width of the spectacle frame 110 is 40 mm, and the vertical line A passes through the midpoint of the first short side 117 , the shortest distance between the eyeball 150 and the receiving surface 122 is 8.09 mm. This distance can ensure that the light emitted by the light-emitting unit is better reflected by the eyeball 150 and then enters the receiving component 120 .

It should be noted that the allowable tolerances of the above distance values, size values and angle values are all ±5%, and in other embodiments, the distance values, size values and angle values may also have other settings, as long as the In one mirror frame 110, the relative positional relationship between each light-emitting unit and the receiving component 120 and the center point 131 may remain unchanged. For example, in some embodiments, the lens distance is between 10mm-12mm, the forward tilt angle α of the lens frame 110 is between 6°-12°, and the maximum length of the two lens frames 110 as a whole in the X-axis direction is 132mm . It can be understood that when the above-mentioned distance values, size values and angle values satisfy the above-mentioned conditions, the light emitted by each light-emitting unit can accurately strike the eyeball 150 from different directions, and can accurately reach the eyeball 150 after being reflected by the eyeball 150 . In the corresponding position of the receiving module, the tracking accuracy of the eyeball 150 is improved.

In addition, referring to FIG. 1 and FIG. 4 together, FIG. 4 shows a schematic diagram of the principle of obtaining the position information of the eyeball 150 by the eye tracking module in some embodiments of the present application. Specifically, point J, point K, point L and point M shown in FIG. 4 respectively represent the light emitted by the first light-emitting unit 111, the second light-emitting unit 112, the third light-emitting unit 113 and the fourth light-emitting unit 114 on the eyes the focus point. When the eyeball 150 is facing up, the light emitted by the first light-emitting unit 111 , the second light-emitting unit 112 , the third light-emitting unit 113 and the fourth light-emitting unit 114 can all strike the eyeball 150 and be reflected by the pupil into the receiving component 120 ; When the eyeball 150 looks up, that is, when the eyeball 150 moves toward the direction of the connecting line between the point J and the point K, the light emitted by the first light-emitting unit 111 and the second light-emitting unit 112 can hit the eyeball and be reflected by the pupil to the receiving component 120, the light emitted by the third light-emitting unit 113 and the fourth light-emitting unit 114 will hit the white of the eye and cannot be reflected into the receiving component 120; When moving, the light emitted by the first light-emitting unit 111 and the third light-emitting unit 113 can strike the eyeball 150 and be reflected by the pupil into the receiving component 120, while the light emitted by the second light-emitting unit 112 and the fourth light-emitting unit 114 will be emitted. On the white of the eye, it cannot be reflected into the receiving component 120 . The rest of the movement of the eyeball 150 can be derived from the above description, and will not be repeated here.

The above-mentioned eye tracking module reasonably configures the positions of the four light-emitting units and the receiving assembly 120. When the frame 110 is placed in front of the eyeball 150, the light emitted by the four light-emitting units strikes the eyeball 150 from four different directions respectively. , when the eyeball 150 moves in a certain direction, the light emitted by the light-emitting unit located in this direction will be reflected by the eyeball 150 and then received by the receiving component 120 , while the light emitted by the light-emitting units in other directions hits the white of the eye and cannot pass through the eyeball 150 The reflections reach the receiving assembly 120 . In addition, since the light emitted by different light emitting units is emitted from the eyeball 150 to the pupil in different directions, the light will be emitted by the pupil in different directions. Therefore, after the light emitted by different light-emitting units is reflected by the eyeball 150, it will reach different positions of the receiving component 120. The processing module of the receiving component 120 can obtain the position information of the eyeball 150 by acquiring the position of the light received by the receiving component 120. Implement eyeball 150 tracking function. Therefore, by reasonably configuring the positions of the four light-emitting units and the receiving assembly 120 , the light emitted by the four light-emitting units can be directed to the eyeball 150 from four different directions, and the movement of the eyeball 150 can be affected from four different directions. track. The above eye tracking module greatly simplifies the eye tracking process, shortens the time required for tracking, and improves user experience.

Specifically, in some embodiments, the processing module can obtain the brightness distribution map or grayscale distribution map of the photosensitive area of the photosensitive element 123 , and can obtain the brightness distribution of the light received by the receiving component 120 according to the brightness distribution or grayscale distribution of the photosensitive area. position, wherein, after the light emitted by the light emitting unit is reflected by the eyeball 150 and reaches a certain part of the photosensitive area, the brightness of the part shows a higher brightness in the brightness distribution diagram of the photosensitive area.

Further, the above-mentioned eye tracking module can be assembled with a display to form an electronic device (not shown in the figure). Specifically, the electronic device can be a virtual imaging device such as a VR device, an AR device, or an MR device. The eye tracking module is used to track the position information of the eyeball 150 to obtain the user's information, and the display of the electronic device can adjust the displayed image according to the information obtained by the eye tracking module, such as adjusting the display angle of the image to enhance the user's view. The movie experience makes users feel immersive.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (10)

1. an eye tracking module, is characterized in that, comprises: a mirror frame, the mirror frame is formed by connecting a first long side, a first short side, a second long side and a second short side in sequence; a receiving assembly, disposed on the second long side; and a first light-emitting unit, a second light-emitting unit, a third light-emitting unit and a fourth light-emitting unit, the first light-emitting unit and the second light-emitting unit are disposed on the first long side, and the first light-emitting unit and the second light-emitting unit is located on both sides of the orthographic projection of the receiving component on the first long side, the third light-emitting unit and the fourth light-emitting unit are respectively arranged on the first short side and the The second short side is remote from the portion of the first long side. 2 . The eye-tracking module according to claim 1 , wherein the first long side has a vertical line passing through the geometric center of the receiving component, the first light-emitting unit and the second light-emitting unit. 3 . The cells are distributed axisymmetrically about the vertical. 3 . The eye tracking module of claim 1 , wherein the first long side has a vertical line passing through the geometric center of the receiving component, the third light-emitting unit and the fourth light-emitting unit The cells are distributed axisymmetrically about the vertical. 4 . The eye tracking module of claim 1 , wherein the receiving component is disposed at the midpoint of the second long side. 5 . 5 . The eye tracking module according to claim 1 , wherein the distance between the geometric centers of the first light-emitting unit and the second light-emitting unit is 25.6 mm±5%; and/or The distance between the third light-emitting unit and the geometric center of the fourth light-emitting unit is 47mm±5%; and/or The vertical distance from the geometric center of the receiving component to the connecting line between the geometric centers of the first light-emitting unit and the second light-emitting unit is 35.5mm±5%; and/or The vertical distances from the geometric center of the third light-emitting unit and the fourth light-emitting unit to the first long side are both 24.4 mm±5%. 6 . The eye tracking module according to claim 1 , wherein the receiving component comprises a mask layer and a photosensitive element, the mask layer is formed with a light-transmitting pattern, and the light-transmitting pattern is formed. 7 . The pattern is used to adjust the light entering the receiving component, so that the light can be imaged on the photosensitive element. 7 . The eye tracking module according to claim 1 , wherein the receiving component has a receiving surface, and the receiving surface is used for receiving light reflected by the eyeball, and the receiving surface reaches the The shortest distance of the eyeball is 8.09mm±5%. 8. The eye tracking module according to any one of claims 1-5, wherein there are two mirror frames, the two mirror frames are connected to each other, and a boundary line is formed between the two mirror frames, The two mirror frames have an axisymmetric structure with respect to the boundary line. 9. The eye tracking module according to claim 8, wherein the distance between the geometric centers of the two receiving components is 66mm±5%; and/or The distance between the geometric centers of the two third light-emitting units is 23mm±5%; and/or The two first light-emitting units are located outside the two second light-emitting units, and the distance between the geometric centers of the two second light-emitting units is 40.4 mm±5%. 10. An electronic device, comprising a display and the eye-tracking module according to any one of claims 1-9, wherein the display can adjust the displayed image according to information obtained by the eye-tracking module.

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