Patent Description:
With the increasing demands of the market and users, video walls (splicing screens) are constantly pursuing extremely narrow borders to achieve a better visual experience. However, due to the structure of sealing and encapsulating liquid crystals on the LCD screen, the black matrix on the edge and the technical limitations of the sealing area, black lines on the edges of the screen cannot be completely eliminated, and there will be an apparent black line, that is, a seam, after splicing screens, as shown in the B area in <FIG>, which will seriously affect the visual effect of the user watching a displayed image.

Therefore, how to improve the user's visual effect and achieve a subjective visual feeling for the user as if there was no seam is a technical problem to be solved urgently in this field.

<CIT> discloses an array-type display apparatus includes display devices each including a display section and a non-display area located around the display section, and transparent plates disposed on the viewer side. Each transparent plate has: a light exit-side deflection portion, provided in a position corresponding to the non-display area, for allowing at least part of light from the display section to exit the transparent plate in the front direction of the display section; and corner deflection portions, provided at the corners of the viewer-side surface, for allowing at least part of light that has passed through the transparent plate to exit it in the front direction. The width of the light exit-side deflection portion is larger than the width of the non-display area.

<CIT> discloses a direct-viewing type display device according to the present invention includes: at least one display panel <NUM> having a display region 10A and a frame region 10F provided outside the display region, with a boundary extending along the first direction between the display region and the frame region; and at least one light-transmitting cover <NUM> disposed on a viewer's side of the at least one display panel. The at least one light-transmitting cover includes a lens portion <NUM> disposed astride the boundary for refracting a portion of light going out from the display region toward the frame region; and a viewer-side surface <NUM> of the lens portion is a curved surface, and a rear-side surface <NUM> of the lens portion is also a curved surface. According to the present invention, with a simpler structure than conventionally, there is provided a display device whose frame region is obscured, or which can display a jointless image in the case of being tiled up, and yet which has a high display quality and is suitable for thinness and light-weight.

<CIT> discloses a display panel and a display device. The display device is formed by splicing at least two sub-display screens. Each sub-display screen comprises an effective display area and a peripheral zone. The splicing part between the peripheral zones of any two adjacent sub-display screens is provided with a connecting border. The connecting borders are provided with lenses located on the light outlet side of the display panel. The lenses are provided with arc-shaped sunken parts, wherein openings of the arc-shaped sunken parts face a display screen, and the arc-shaped sunken parts are throughout the lenses in the length direction. When human eyes watch the display panel, the rays watched by the human eyes are refracted onto the arc-shaped sunken parts through the outer contours of the lenses and then are totally reflected and/or refracted through the arc-shaped sunken parts, and most of the rays radiate to a display zone of the display panel. In this way, only a very few of rays fall into zones corresponding to the connecting borders, and therefore the width of the connecting borders sawn by the human eyes is narrower. Accordingly, by means of the display panel, the width of the connecting borders sawn by the human eyes can be reduced, and watchability and continuity of spliced images on the display panel are improved.

The present disclosure provides an array substrate and a splicing display unit and a display screen, which can visually eliminate the seam, improve the user's visual effect on splicing screens, and achieve a subjective visual feeling for the user as if there was no seam.

According to a first aspect of the embodiments of the present disclosure, there is provided a display screen according to claim <NUM>. The dependent claims set out particular embodiments of the invention.

According to a second aspect of the embodiments of the present disclosure, there is provided a splicing display unit according to claim <NUM>. The dependent claims set out particular embodiments of the invention.

In the display screen of the present disclosure, by providing the overall structure and providing the first arc surface in the optical structure, the light emitted from the display area of the display module can be refracted and distributed in the front-view area corresponding to the seam, which can visually eliminate the seam, improve the user's visual effect on splicing screens, and achieve a subjective visual feeling for the user as if there was no seam.

In the splicing display unit of the present disclosure, by providing the overall structure and providing the first arc surface in the optical structure, the light emitted from the display area of the display module can be refracted and distributed in the front-view area corresponding to the black edge area, which can visually eliminate the black edge area, improve the user's visual effect on splicing screens, and achieve a subjective visual feeling for the user as if there was no black edge area.

Examples will be described in detail herein, with the illustrations thereof represented in the drawings. When the following descriptions involve the drawings, like numerals in different drawings refer to like or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

The terms used in the present disclosure are for the purpose of describing particular examples only, and are not intended to limit the present disclosure. Unless otherwise defined, technical or scientific terms used in this application shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Terms determined by "a" or "an" used in the specification and claims of this application also do not denote a quantitative limitation, but rather denote the presence of at least one. Terms like "comprise" or "include" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Connected to" or "connected with" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "A plurality of" includes two, equivalent to at least two. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

As shown in <FIG>, this example, which is not according to the claimed invention, provides a display screen <NUM>. The display screen <NUM> includes a plurality of display modules <NUM> and a plurality of optical structures <NUM>, the plurality of display modules and the plurality of optical structures being closely arranged. Each of the optical structures <NUM> is arranged corresponding to one of the display modules <NUM> and is arranged on a side of a light-emitting surface of the display module <NUM>. Adjacent two display modules <NUM> are arranged close to each other, and optical structures <NUM> on adjacent two display modules <NUM> are arranged close to each other.

Each of the display modules <NUM> includes a display area <NUM> and a black edge area <NUM> arranged around the display area <NUM>, that is, the display area <NUM> is located at the center of the display module, and the black edge area <NUM> is arranged around the display area <NUM>, and located at the edge of the display module. Black edge areas <NUM> of adjacent two display modules <NUM> are spliced together to form a seam <NUM>.

Each of the optical structures <NUM> includes a first surface <NUM> and a second surface <NUM> disposed opposite to each other, and the second surface <NUM> of the optical structure <NUM> is attached to the display module <NUM>.

One end of the first surface <NUM> of the optical structure <NUM> close to the seam <NUM> is a first arc surface <NUM>, and the first arc surface <NUM> is configured to refract light emitted from the display area <NUM> of the display module <NUM> and then distribute the refracted light to a front-view area corresponding to the seam <NUM>. As shown in <FIG>, the direction of the arrow in the figure is a propagation direction of the light emitted from the display area <NUM> of the display module <NUM>. In order to more clearly show the propagation direction of the light emitted from the display area <NUM> of the display module <NUM>, a cross section line is removed from the figure.

It should be noted that the front-view area corresponding to the seam <NUM> refers to that an area where the seam <NUM> is observed when a user watches the display module <NUM> from a front view angle (i.e., an angle perpendicular to the display module <NUM>) in absence of an optical structure.

In this way, by providing the overall structure and providing the first arc surface <NUM> in the optical structure <NUM>, the light emitted from the display area <NUM> of the display module <NUM> can be refracted and distributed in the front-view area corresponding to the seam <NUM>, which can visually eliminate the seam <NUM>, improve the user's visual effect on splicing screens, and achieve a subjective visual feeling for the user as if there was no seam <NUM>. Specifically, the light is refracted by the first arc surface <NUM> of the optical structure <NUM>, so that the display area <NUM> of the display module <NUM> is "enlarged" to the imaging surface, so as to achieve the visual effect as if the physical seam <NUM> of the display screen <NUM> was eliminated.

Further, the first arc surface <NUM> is a convex arc surface configuration. The convex arc surface configuration refers to that the arc surface is convex in a direction away from the center of the optical structure. And the end surface of the first arc surface <NUM> is located within the edge of the optical structure <NUM>.

That is to say, the first arc surface <NUM> extends from a plane where the first surface <NUM> is located toward a direction close to the display module <NUM> to form a convex arc surface configuration, thereby forming a structure similar to a convex lens, to implement refracting the light emitted from the display area <NUM> of the module <NUM> and distributing the refracted light in the front-view area corresponding to the seam <NUM>. Further, by defining parameters of the structure of the convex lens, it is possible to make the optical path to be deviated from the incident light direction by a specific angle to achieve an effect of magnifying an image, thereby eliminating the seam <NUM> and improving the user experience.

In addition, compared with some optical structures in the prior art that are formed by overlapping several groups of prism structures, and the technical solutions in which several groups of prism structures are arranged to translate the image to the area of the seam, the optical structure <NUM> of the display screen <NUM> of this example has an image magnification effect, which can be suitable for N*N splicing, and is a single structure, so as to avoid the change of the picture effect caused by offsets of multiple structures in assembling.

Specifically, as shown in <FIG>, in order to more clearly show the arrangement of the first arc surface <NUM> in the optical structure <NUM>, the cross section line in the figure is removed. A size L2 of an orthographic projection of the first arc surface <NUM> on the display module <NUM> along the width direction of the seam <NUM> is larger than or equal to the width W of the seam <NUM>, and smaller than or equal to the width W of the seam <NUM> plus <NUM>. The width W of the seam <NUM> is <NUM>-<NUM>. By making the size L2 of the orthographic projection of the first arc surface <NUM> on the display module <NUM> along the width direction of the seam <NUM> to be larger than or equal to the width W of the seam <NUM>, it is possible to block the seam <NUM>, but if the size is too large, the effect of refraction will be reduced.

The first arc surface <NUM> includes a first end <NUM> close to the display module <NUM> and a second end <NUM> away from the display module <NUM>. A distance D3 from a horizontal plane where the first end <NUM> of the first arc surface <NUM> is located to a horizontal plane where the second end <NUM> of the first arc surface <NUM> is located is smaller than or equal to one half of a thickness D1 of the optical structure <NUM>. Within this range, the larger the value of the distance D3 from the horizontal plane where the first end <NUM> of the first arc surface <NUM> is located to the horizontal plane where the second end <NUM> of the first arc surface <NUM> is located, the better the refraction effect and the better the front view effect, but the larger thickness of the optical structure will increase the weight and material cost; which will be traded off during design. Preferably, the distance D3 from the horizontal plane where the first end <NUM> of the first arc surface <NUM> is located to the horizontal plane where the second end <NUM> of the first arc surface <NUM> is located is <NUM>-<NUM>.

A radius R1 of the first arc surface <NUM> is larger than or equal to the width W of the seam <NUM>, and smaller than or equal to the width W of the seam <NUM> plus <NUM>. Preferably, the radius R1 of the first arc surface <NUM> is <NUM>-<NUM>.

The arc length L1 of the first arc surface <NUM> is defined collectively by the size L2 of the orthographic projection of the first arc surface <NUM> on the display module <NUM> along the width direction of the seam <NUM>, the distance D3 from the horizontal plane where the first end <NUM> of the first arc surface <NUM> is located to the horizontal plane where the second end <NUM> of the first arc surface <NUM> is located and the radius R1 of the first arc surface <NUM>. The larger the arc length L1 of the first arc surface <NUM> is, the larger the length of the seam that can be covered is, which can be designed based on the length of the seam.

In this example, which is not according to the claimed invention, a thickness D1 of the optical structure <NUM> is <NUM>-<NUM>. The material of the optical structure <NUM> is glass, or PMMA (polymethyl methacrylate), or PC (polycarbonate). The optical structure <NUM> is fixed on the display module <NUM> through an optical adhesive layer <NUM>.

In this example, which is not according to the claimed invention, the second surface <NUM> of the optical structure <NUM> in this example is an integral flat plane.

<FIG> is a front view of a simulated luminance distribution diagram of the display screen <NUM> of this example, which is not according to the claimed invention. It can be seen from <FIG> that a user will substantially not be able to observe the seam <NUM> at the front-view angle, so that the seam <NUM> can be visually eliminated, the user's visual effect on splicing screens can be improved, achieving a subjective visual feeling for the user as if there was no seam <NUM>.

As shown in <FIG>, the overall structure of the display screen of this example, which is according to the claimed invention, is substantially the same as the structure in Example <NUM>, except in that one end of the second surface <NUM> of the optical structure <NUM> close to the seam <NUM> is a second arc surface <NUM>, and the light emitted from the display area <NUM> of the display module <NUM> is reflected by the second arc surface <NUM> to supplement the light in the non-front-view area corresponding to the seam <NUM>.

It should be noted that the non-front-view area corresponding to the seam <NUM> refers to an area where the seam <NUM> is observed when a user watches the display module <NUM> from an angle other than the front view angle (that is, an angle that is not perpendicular to the display module <NUM>, that is, an oblique view angle or a large view angle) in absence of an optical structure.

In this way, by providing the second arc surface <NUM>, the light emitted from the display area <NUM> of the display module <NUM> can be reflected, and the light can be emitted through the first surface <NUM> of the light structure, so that the light can be supplemented for the non-front-view area corresponding to the seam <NUM>. It can further visually eliminate the seam <NUM> for the non-front-view area corresponding to the seam <NUM>, further improving the user's visual effect on a splicing screen, and achieving a subjective visual feeling for the user as if there was no seam <NUM>.

Further, the second arc surface <NUM> is a concave arc surface configuration. Wherein, the concave arc surface configuration refers to that the arc surface is concave in a direction close to the center of the optical structure.

Specifically, a size L4 of an orthographic projection of the second arc surface <NUM> on the display module <NUM> along the width direction of the seam <NUM> is larger than or equal to one half of the width W of the seam <NUM>, and smaller than or equal to one half of the width W of the seam <NUM> plus <NUM>, so as to cover the length of the seam from an oblique view angle.

The second arc surface <NUM> includes a third end <NUM> close to the display module <NUM> and a fourth end <NUM> away from the display module <NUM>.

A distance D2 from the horizontal plane where the fourth end <NUM> is located to the horizontal plane where the third end <NUM> is located is larger than or equal to one half of the width W of the seam <NUM> plus <NUM>, and the larger the value of D2 is, the better the oblique view angle effect will be, but the larger thickness of the optical structure will increase the weight and material cost; therefore, the oblique angle and the thickness of the model should be traded off in the design, and the distance D2 from the horizontal plane where the fourth end <NUM> is located to the horizontal plane where the third end <NUM> is located is generally set to be larger than or equal to one half of the width of the seam and smaller than or equal to the thickness of the optical structure minus <NUM>.

A distance D4 between the end of the first arc surface <NUM> closest to the second surface <NUM> (the first end <NUM> of the first arc surface <NUM>) and the end of the second arc surface <NUM> closest to the first surface <NUM> (the fourth end <NUM> of the second arc surface <NUM>) is larger than zero. Preferably, the distance D4 between the first end <NUM> of the first arc surface <NUM> and the fourth end <NUM> of the second arc surface <NUM> is larger than or equal to <NUM>, and smaller than or equal to <NUM> to avoid sharp corners during assembly and scratches during operation, and facilitates the processing of materials. It should be noted that when a side edge <NUM> connected between the first surface <NUM> and the second surface <NUM> is perpendicular to the display module <NUM>, a length of the side edge <NUM> is equal to the distance D4 between the first end <NUM> of the first arc surface <NUM> and the fourth end <NUM> of the second arc surface <NUM>.

A radius R2 of the second arc surface <NUM> is <NUM>-<NUM>. The smaller the value of the radius R2 of the second arc surface <NUM> is, the better the effect of oblique view angle will be, but the worse the effect of front view angle will be; and vice versa. Therefore, the effect of oblique view angle and the effect of front view angle should be traded of during design. When the value of the radius R2 of the second arc surface <NUM> is <NUM>-<NUM>, the effects will be optimal. The arc length L3 of the second arc surface <NUM> is determined jointly from the size L4 of the orthographic projection of the second arc surface <NUM> on the display module <NUM> along the width direction of the seam <NUM>, the distance D2 from the horizontal plane where the fourth end <NUM> is located to the horizontal plane where the third end <NUM> is located and the radius R2 of the second arc surface <NUM>.

The end of the second surface <NUM> of the optical structure <NUM> close to the seam <NUM> in this example is a concave arc surface configuration. <FIG> is a simulated luminance distribution diagram of the display screen <NUM> of this example. It can be seen in <FIG> that, a user will substantially not be able to observe the seam <NUM> at the front view angle, which can visually eliminate the seam <NUM>, improve the user's visual effect on splicing screens, and achieve a subjective visual feeling for the user as if there was no seam <NUM>.

It should be noted that the end of the second surface <NUM> close to the seam <NUM> can also be in other structural forms, but it has different effects on the optical path of the oblique view angle.

As in the optical structure <NUM> in Example <NUM>, which is not according to the claimed invention, when the second surface <NUM> is an integral flat plane, referring back to <FIG>, the user can hardly observe the seam <NUM> from a front angle. However, as shown in <FIG>, when watching the display module <NUM> at an oblique angle of <NUM> degrees, the user can observe the structure of part of the seam <NUM>, that is, the part O in the figure. That is, for the optical structure <NUM> in Example <NUM>, the seam <NUM> seen from a front view angle can be visually eliminated through the first arc surface <NUM>, but the seam <NUM> seen by a user at an oblique view angle or a large view angle cannot be visually eliminated.

Similarly, in another example, which is not according to the claimed invention, as shown in <FIG>, when the end of the second surface <NUM> of the optical structure <NUM> close to the seam <NUM> is a flat surface that forms a certain angle with the plane where the display module <NUM> is located, as shown in <FIG>, the user will substantially not be able to observe the seam <NUM> at a front angle. However, as shown in <FIG>, when the user watches the display module <NUM> at an oblique angle of <NUM> degrees, the structure of part of the seam <NUM> can also be observed, that is, the part P in the figure. That is, when the end of the second surface <NUM> close to the seam <NUM> is set as a flat plane with a certain angle formed with the plane where the display module <NUM> is located, only part of the light can be emitted out of the optical structure <NUM>, to alleviate the problem that the user can see the seam <NUM> in oblique or large view angles, which effect is less than desirable.

In yet another example, which is not according to the claimed invention, as shown in <FIG>, when the end of the second surface <NUM> of the optical structure <NUM> close to the seam <NUM> is a convex arc structure, as shown in <FIG>, the user will substantially not be able to observe the seam <NUM> at a front angle. However, as shown in <FIG>, when the user watches the display module <NUM> at an oblique angle of <NUM> degrees, the user can still observe a part of the structure of the seam <NUM>, that is, the part Q in the figure. That is to say, when the end of the second surface <NUM> close to the seam <NUM> is provided as a convex arc structure, only a very small part of the light can be emitted out of the optical structure <NUM>, to alleviate the problem that the user can see the seam <NUM> in oblique or large view angles, which effect is undesirable.

Only with the configuration of Example <NUM>, which is according to the claimed invention, in which the end of the second surface <NUM> of the optical structure <NUM> close to the seam <NUM> is a concave arc structure, not only the user will substantially not be able to observe the seam <NUM> at a front angle (referring back to <FIG>); but also, when the user watches the display module <NUM> at an oblique angle of <NUM> degrees (as shown in <FIG>), the seam <NUM> cannot be observed at all. That is, when the end of the second surface <NUM> close to the seam <NUM> is configured as a concave arc structure, all light can exit the optical structure <NUM> to alleviate the problem that the user can see the seam <NUM> in a large view angle, which effect is desirable.

Through the above description, the optimal optical structure <NUM> can be obtained in which one end of the first surface <NUM> close to the seam <NUM> is a convex arc structure and one end of the second surface <NUM> close to the seam <NUM> is a concave arc structure. This can eliminate the seam from both the front view angle and the large view angle.

As shown in <FIG>, in this example, which is not according to the claimed invention, there is provided a splicing display unit <NUM>. A plurality of splicing display units <NUM> are closely arranged to form the display screen in Example <NUM>, which is also not according to the claimed invention, That is, the splicing display unit <NUM> in this example is the smallest splicing unit of the display screen in Example <NUM>.

The splicing display unit <NUM> includes a display module <NUM> and an optical structure <NUM>, the display module and the optical structure being stacked together, and the optical structure <NUM> is arranged on one side of the light emitting surface of the display module <NUM>. The configuration of the optical structure <NUM> of this example can be made to <FIG>.

The display module <NUM> includes a display area <NUM> and a black edge area <NUM> arranged around the display area <NUM>, that is, the display area <NUM> is located at the center of the display module <NUM>, and the black edge area <NUM> is arranged around the display area <NUM>, so as to be located at the edge of the display module <NUM>. When a plurality of splicing display units <NUM> are closely arranged, the black edge areas <NUM> of adjacent two display modules <NUM> are spliced together to form the seam <NUM> of the display screen in Example <NUM>.

One end of the first surface <NUM> of the optical structure <NUM> close to the black edge area <NUM> of the display module <NUM> is a first arc surface <NUM>, and the first arc surface <NUM> is configured to refract the light emitted from the display area <NUM> of the display module <NUM>, and then distribute the refracted light in the front-view area corresponding to the black edge area <NUM>.

It should be noted that the front-view area corresponding to the black edge area <NUM> refers to that an area where the black edge area <NUM> is observed when a user watches the display module <NUM> from a front view angle (i.e., an angle perpendicular to the display module <NUM>) in absence of an optical structure.

In this way, by providing the overall structure and providing the first arc surface <NUM> in the optical structure <NUM>, the light emitted from the display area <NUM> of the display module <NUM> can be refracted and distributed in the front-view area corresponding to the black edge area <NUM>, which can visually eliminate the black edge area <NUM>, improve the user's visual effect on splicing screens, and achieve a subjective visual feeling for the user as if there was no black edge area <NUM>. Specifically, the light is refracted by the first arc surface <NUM> of the optical structure <NUM>, so that the display area <NUM> of the display module <NUM> is "enlarged" to the imaging surface, so as to achieve the visual effect as if the physical black edge area <NUM> of the display screen <NUM> was eliminated.

Further, a distance from the first arc surface <NUM> to the plane where the display module <NUM> is located gradually decreases from a direction away from the display module <NUM> to a direction close to the display module <NUM>, and the first arc surface <NUM> is a convex arc surface configuration. The convex arc surface configuration refers to that the arc surface is convex in a direction away from the center of the optical structure.

That is to say, the first arc surface <NUM> extends from a plane where the first surface <NUM> is located toward a direction close to the display module <NUM> to form a convex arc surface configuration, thereby forming a structure similar to a convex lens, to implement refracting the light emitted from the display area <NUM> of the module <NUM> and distributing the refracted light in the front-view area corresponding to the black edge area <NUM>. Further, by defining parameters of the structure of the convex lens, it is possible to make the optical path to be deviated from the incident light direction by a specific angle to achieve an effect of magnifying an image, thereby eliminating the black edge area <NUM> and improving the user experience.

In addition, compared with some optical structures in the prior art that are formed by overlapping several groups of prism structures, and the technical solutions in which several groups of prism structures are arranged to translate the image to the area of the black edge area, the optical structure <NUM> of the display screen <NUM> of this example has an image magnification effect, which can be suitable for N*N splicing, and is a single structure, so as to avoid the change of the picture effect caused by offsets of multiple structures in assembling.

Specifically, as shown in <FIG>, in order to more clearly show the arrangement of the first arc surface <NUM> in the optical structure <NUM>, the cross section line in the figure is removed. A size L2 of an orthographic projection of the first arc surface <NUM> on the display module <NUM> along the width direction of the black edge area <NUM> is larger than or equal to twice the width w of the black edge area <NUM>, and smaller than or equal to twice the width w of the black edge area <NUM> plus <NUM>. The width w of the black edge area <NUM> is <NUM>-<NUM>. By making the size L2 of the orthographic projection of the first arc surface <NUM> on the display module <NUM> along the width direction of the black edge area <NUM> to be larger than or equal to twice the width w of the black edge area <NUM>, it is possible to block the black edge area <NUM>, but if the size is too large, the effect of refraction will be reduced.

A radius R1 of the first arc surface <NUM> is larger than or equal to twice the width w of the black edge area <NUM>, and smaller than or equal to twice the width w of the black edge area <NUM> plus <NUM>. Preferably, the radius R1 of the first arc surface <NUM> is <NUM>-<NUM>.

The arc length L1 of the first arc surface <NUM> is defined collectively by the size L2 of the orthographic projection of the first arc surface <NUM> on the display module <NUM> along the width direction of the black edge area <NUM>, the distance D3 from the horizontal plane where the first end <NUM> of the first arc surface <NUM> is located to the horizontal plane where the second end <NUM> of the first arc surface <NUM> is located and the radius R1 of the first arc surface <NUM>. The larger the arc length L1 of the first arc surface <NUM> is, the larger the length of the seam that can be covered is, which can be designed based on the length of the seam.

The splicing display unit <NUM> of the present example can visually eliminate the black edge area <NUM>. The user's visual effect on splicing screens can be improved, achieving a subjective visual feeling for the user as if there was no black edge area <NUM>.

As shown in <FIG>, the overall structure of the splicing display unit of this example, which is according to the claimed invention, is substantially the same as the structure in Example <NUM>, which is not according to the claimed invention, except in that one end of the second surface <NUM> of the optical structure <NUM> close to the black edge area <NUM> is a second arc surface <NUM>, and the light emitted from the display area <NUM> of the display module <NUM> is reflected by the second arc surface <NUM> to supplement the light in the non-front-view area corresponding to the black edge area <NUM>. The configuration of the optical structure <NUM> of this example can refer to <FIG>.

It should be noted that the non-front-view area corresponding to the black edge area <NUM> refers to an area where the black edge area <NUM> is observed when a user watches the display module <NUM> from an angle other than the front view angle (that is, an angle that is not perpendicular to the display module <NUM>, that is, an oblique view angle or a large view angle) in absence of an optical structure.

In this way, by providing the second arc surface <NUM>, the light emitted from the display area <NUM> of the display module <NUM> can be reflected, and the light can be emitted through the first surface <NUM> of the light structure, so that the light can be supplemented for the non-front-view area corresponding to the black edge area <NUM>. It can further visually eliminate the black edge area <NUM> for the non-front-view area corresponding to the black edge area <NUM>, further improving the user's visual effect on a splicing screen, and achieving a subjective visual feeling for the user as if there was no black edge area <NUM>.

Specifically, a size L4 of an orthographic projection of the second arc surface <NUM> on the display module <NUM> along the width direction of the black edge area <NUM> is larger than or equal to the width w of the black edge area <NUM>, and smaller than or equal to the width w of the black edge area <NUM> plus <NUM>, so as to cover the length of the seam from an oblique view angle.

A distance D2 from the horizontal plane where the fourth end <NUM> is located to the horizontal plane where the third end <NUM> is located is larger than or equal to the width w of the black edge area <NUM> plus <NUM>, and the larger the value of D2 is, the better the oblique view angle effect will be, but the larger thickness of the optical structure will increase the weight and material cost; therefore, the oblique angle and the thickness of the model should be traded off in the design, and the distance D2 from the horizontal plane where the fourth end <NUM> is located to the horizontal plane where the third end <NUM> is located is generally set to be larger than or equal to the width w of the black edge area <NUM> and smaller than or equal to the thickness of the optical structure minus <NUM>.

A radius R2 of the second arc surface <NUM> is <NUM>-<NUM>. The smaller the value of the radius R2 of the second arc surface <NUM> is, the better the effect of oblique view angle will be, but the worse the effect of front view angle will be; and vice versa. Therefore, the effect of oblique view angle and the effect of front view angle should be traded of during design. When the value of the radius R2 of the second arc surface <NUM> is <NUM>-<NUM>, the effects will be optimal. The arc length L3 of the second arc surface <NUM> is determined jointly from the size L4 of the orthographic projection of the second arc surface <NUM> on the display module <NUM> along the width direction of the black edge area <NUM>, the distance D2 from the horizontal plane where the fourth end <NUM> is located to the horizontal plane where the third end <NUM> is located and the radius R2 of the second arc surface <NUM>.

With the configuration of Example <NUM> in which the end of the second surface <NUM> of the optical structure <NUM> close to the black edge area <NUM> is a concave arc structure, not only the user will substantially not be able to observe the black edge area <NUM> at a front angle; but also, when the user watches the display module <NUM> at an oblique angle of <NUM> degrees, the black edge area <NUM> cannot be observed at all. That is, when the end of the second surface <NUM> close to the black edge area <NUM> is configured as a concave arc structure, all light can exit the optical structure <NUM> to alleviate the problem that the user can see the black edge area <NUM> in a large view angle, which effect is desirable.

Claim 1:
A display screen (<NUM>), comprising a plurality of display modules (<NUM>) and a plurality of optical structures (<NUM>), the plurality of display modules and the plurality of optical structures being closely arranged, wherein each of the optical structures is arranged corresponding to one of the display modules, and is arranged on a side of a light-emitting surface of the display module; adjacent two display modules are arranged close to each other, and optical structures on adjacent two display modules are arranged close to each other;
each of the display modules comprises a display area (<NUM>) and a black edge area (<NUM>) arranged around the display area, black edge areas of adjacent two display modules are spliced together to form a seam (<NUM>);
each of the optical structures comprises a first surface (<NUM>) and a second surface (<NUM>) disposed opposite to each other, and the second surface of the optical structure is attached to the display module;
one end of the first surface of the optical structure close to the seam is a first arc surface (<NUM>), and the first arc surface is configured to refract light emitted from the display area of the display module, and then distribute the refracted light in a front-view area corresponding to the seam,
wherein one end of the second surface (<NUM>) of the optical structure (<NUM>) close to the seam (<NUM>) is a second arc surface (<NUM>), and light emitted from the display area of the display module is reflected by the second arc surface to supplement light in a non-front-view area corresponding to the seam,
wherein the first arc surface (<NUM>) is a convex arc surface configuration and the second arc surface (<NUM>) is a concave arc surface configuration.