CN104021732A - Display device - Google Patents

Abstract

The present invention provides a display device, which includes a plurality of display screens arranged in an array, and there is a splicing seam between two adjacent display screens, and the display device also includes a light bar arranged at the splicing seam; The reflector on the back of the screen, the reflector reflects the light emitted by the light bar, so that the light incident on the display screen is parallel light. In the above-mentioned display device, only the display screens are spliced, and light bars are arranged at the joints of the display screens, and reflectors matching the light bars are arranged, and the reflector boards are used to reflect light from the light bars to provide parallel or approximately parallel light for the display screen. , separate the backlight from the display, and integrate the backlights of multiple display modules. Since the splicing part is only the display screen, the material thickness and strength limits to be spliced are reduced, making the width of the structure connected to the display screen narrower, thereby reducing the width of the splicing seam of the display device, which is extremely The picture quality of the display device has been greatly improved.

Description

a display device

technical field

The invention relates to the technical field of large-screen splicing, in particular to a display device.

Background technique

With the continuous development of flat panel display technology, large-screen splicing technology is widely used in security, monitoring, medical, radio and television, advertising media and other fields.

In the large-screen splicing technology, multiple complete display modules need to be arranged according to X×Y (wherein, X represents the number of columns of display modules contained in the splicing screen, and Y represents the number of rows of display modules contained in the splicing screen. ) in the form of splicing and combining with external support structure to form a large-sized splicing screen. A complete display module usually includes a display screen, a backlight, and a frame that fixes the two together. Due to the existence of the frame, there will be a seam in the final combined splicing screen, and the width of the seam depends on the adjacent The sum of the border widths of the two display modules. The splicing seam causes the display screen to be divided, destroying the continuity and integrity of the screen. For large-sized splicing screens, the width of the splicing seam should be less than 5mm in order to have a good display effect.

In the prior art, the width of the seam is usually reduced by reducing the frame width of the display module. However, due to the limitations of material thickness, structural strength, etc., there is a limit to reducing the frame width. At present, the frame width of the display module can reach 6mm-10mm, so the splicing seam width of the splicing screen usually reaches 12mm-20mm, which is far from meeting the requirements of high-quality display images.

Contents of the invention

The invention provides a display device to reduce the width of the seam and improve the display picture quality of the display device.

To achieve the above object, the present invention adopts the following technical solutions:

A display device, comprising a plurality of display screens arranged in an array, there is a seam between two adjacent display screens, and the display device further includes: a light bar arranged at the seam; A reflective plate arranged on the back of the display screen, the reflective plate reflects the light emitted by the light bar, so that the light incident on the various parts of the display screen is parallel light.

Preferably, the light bar is located at the joint between every two adjacent rows of the display screens and/or at the joint between every two adjacent columns of the display screens.

Preferably, the display device further includes: a support member arranged at the seam between every two adjacent display screens, the light bar is arranged on the support member; The outer frame on the front, the outer frame has a frame structure corresponding to the display screens one by one, so as to cooperate with the support component to fix the edge of each display screen.

Preferably, there is a groove on the support member; the display device further includes: at least one layer of optical film disposed between the display screen and the reflector, the edge of the optical film is embedded in the recess of the support member slot for fixing.

Preferably, if the display device is formed by splicing two display screens, the reflection plate is a concave mirror structure, and the light bar is located at the focal point of the reflection plate.

Preferably, a reflective film is provided on the side of the reflective plate facing the display screen, and the reflectivity of the reflective film is the same everywhere.

Preferably, if the display device is spliced by two display screens, the reflector is a bent flat plate structure, and the bending line of the light bar and the reflector is perpendicular to the display The projection of the direction of the screen on the display screen overlaps.

Preferably, a reflective film is provided on the side of the reflective plate facing the display screen, and the reflectivity of the reflective film increases from the bend of the reflective plate to both sides.

Preferably, if the display device is spliced by at least three display screens, and the light bar is located at the splicing seam between every two adjacent rows or every two adjacent columns of the display screens, then The reflecting plate is a structure in which a plurality of concave mirrors are connected end to end, and the light bars are located at the focal points of the plurality of concave mirrors in one-to-one correspondence.

Preferably, a reflective film is provided on the side of the reflective plate facing the display screen, and the reflectivity of the reflective film is the same everywhere.

Preferably, if the display device is spliced by at least three display screens, and the light bar is located at the splicing seam between every two adjacent rows or every two adjacent columns of the display screens, then The reflector is a structure in which a plurality of bent plane plates are connected end to end, and the light bars are in one-to-one correspondence with the bending lines of the bent plane plates along the direction perpendicular to the display screen. The projections on the monitor overlap.

Preferably, there is a reflective film on the side of the reflective plate facing the display screen, and the reflectivity of the reflective film on each of the bent flat plates is from the bend of the bent flat plate to both sides. side increments.

In the display device provided by the present invention, only the display screens are spliced, light bars are arranged at the joints of the display screens, and reflectors matching the light bars are provided, and the light of the light bars is reflected by the reflector boards to display images on the display screen. Parallel or nearly parallel light is provided, so that the backlight is separated from the display screen, and the backlight of multiple display modules is integrated. Since the parts to be spliced are thinned from the entire display module including the display screen and backlight to only the display screen, the thickness and strength limit of the material to be spliced is reduced, and the width of the structure connected to the display screen can be made wider. Narrow, which in turn reduces the width of the seam of the display device, greatly improving the picture quality of the display device.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a perspective view of a display device provided by Embodiment 1 of the present invention;

FIG. 2 is a front view of a display device with a structure provided by Embodiment 2 of the present invention;

Fig. 3 is an optical path diagram of the display device shown in Fig. 2;

FIG. 4 is a top view of the display device shown in FIG. 2;

FIG. 5 is a front view of a display device with another structure provided by Embodiment 2 of the present invention;

Fig. 6 is a partial enlarged view of the seam of the display device shown in Fig. 2;

7 is a front view of a display device with a structure provided by Embodiment 3 of the present invention;

FIG. 8 is a top view of a display device spliced in a 3×2 format;

FIG. 9 is a front view of a display device with another structure provided by Embodiment 3 of the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Embodiment one

This embodiment provides a display device, the structure of which is shown in FIG. 1 . The display device includes a plurality of display screens 101 arranged in an array, and there are joints between two adjacent display screens 101 .

The above-mentioned display device also includes: a light bar 102 arranged at the seam; a reflector 103 arranged on the back of the display screen, and the reflector 103 reflects the light emitted by the light bar, so that the light incident on various parts of the display screen is parallel light .

In this embodiment, according to the position of the light bar 102 and the direction of the emitted light, the shape of the reflector 103 and the reflectivity of each place can be designed to match the light bar 102 . When the light from the light bar 102 reaches the reflector 103, the reflector 103 reflects the light, changes the direction of the light, and makes the original radial light into parallel light or nearly parallel light incident on the display screen, thus ensuring The uniformity of optical brightness across the display is ensured.

It should be noted that, in this embodiment, the side of the display screen 101 that displays in actual use is referred to as the front side of the display screen 101 , and the side opposite to the front side of the display screen 101 is referred to as the back side of the display screen 101 .

In addition, the light reflected by the reflector 103 in this embodiment is parallel light under ideal conditions. The light reflected by the reflector 103 cannot be absolutely parallel light, so it is required that the light finally incident on the display screen 101 is approximately parallel light.

Different from the conventional structure in which the display screen and the backlight are combined into a display module through a frame, and then the display modules are spliced to form a splicing screen, the display device provided in this embodiment only splices the display screen 101, and the display screen 101 A light bar 102 is arranged at the joint of the light bar 102 , and a reflector 103 matching the light bar 102 is set to reflect the light emitted by the light bar 102 to provide suitable light for the display screen 101 to display. Through the above-mentioned structure, the backlight sources of multiple display modules are fused together, so that only the display screen 101 is the part that needs to be spliced in this embodiment, which greatly reduces the thickness of the material to be spliced. By lowering the limit of the splicing strength, the width of the structure connecting the display screen 101 can be made extremely narrow, thereby greatly reducing the width of the splicing seam and improving the picture display quality of the display device.

Embodiment two

Based on the first embodiment, this embodiment provides a display device including only two display screens.

As shown in FIG. 2 , the display device is formed by splicing two display screens 201 , the reflecting plate 203 preferably has a concave mirror structure, and the light bar 202 is preferably located at the focal point of the reflecting plate 203 .

The combination of the light bar 202 and the reflector 203 plays the role of backlight. Since the light emitted by the light bar 202 is radial in the direction perpendicular to the length of the light bar 202, the shape of the reflector 203 in the direction perpendicular to the length of the light bar 202 It is in the shape of a concave mirror (that is, a curved surface), and the light emitted from the light bar 202 is the light passing through the focal point. Therefore, after being reflected by the reflector 203 of the concave mirror structure, the light is converted into parallel light, thereby ensuring that it reaches the display screen 201 The uniformity of light everywhere makes the brightness of the picture uniform. The working principle can be seen in Figure 3.

In this embodiment, by setting the reflecting plate 203 as a concave mirror structure, and setting the light bar 202 at the focal point of the reflecting plate 203, the light rays finally irradiated to the various parts of the display screen 201 are parallel rays or approximately parallel rays, ensuring The uniformity of the optical brightness of the picture is guaranteed. Since the parts to be spliced are only the display screen 201 and do not include a backlight source, the thickness of the splicing material and the limit of the connection strength are reduced, so that the width of the structure connecting the two display screens 201 can be extremely narrow, and finally reduced Seam width.

Specifically, if the display device in this embodiment is spliced in a 2×1 format (that is, it has one row and two columns of display screens 201), the splicing seam is along the column direction, and the light bar 202 is located at the splicing seam and is also along the column direction. See Figure 4. The cross-section of the reflection plate 203 along the row direction is preferably in the shape of a concave mirror, and the cross-section along the column direction is in the shape of a straight line equal to the length of the seam.

In order to enhance the reflective effect of the reflective plate 203 and increase the brightness of the display screen, in this embodiment, the surface of the reflective plate 203 facing the display screen 201 can be made as smooth as possible through technological improvement.

In consideration of reducing process difficulty and production cost, it is more preferable in this embodiment to arrange a reflective film on the side of the reflective plate 203 facing the display screen 201 . The preparation of a reflective film with high reflectivity can preferably be achieved through processes such as coating, which is much lower than the process difficulty and production cost of directly smoothing the surface of the reflective plate 203 .

The reflectance of each part of the reflective film may be the same or different. In this embodiment, based on the structure in which the light bar 202 is located at the focal point of the reflector 203, the light reflected by the reflector 203 is incident in parallel or approximately in parallel, which can better ensure the uniformity of the light at all parts of the display screen 201, so that all parts of the reflective film The reflectance can be set to be the same; considering the actual situation, the brightness of the area near the display screen 201 to the light bar 202 will be higher than the brightness of the area farther from the light bar 202, so it is preferable to set the distance from the light bar The reflectance of the reflective film closer to 202 is set lower than that of the reflective film farther away from the light bar, so as to balance the light reflected to each area on the display screen and further improve the uniformity of light everywhere.

It should be noted that, the above is only an example of the structure where the light bar 202 is located at the focal point of the reflector when the reflector 203 is a concave mirror structure. In other embodiments of the present invention, the light bar 202 may not be located at the reflector. The focal point of plate 203 (for example, can be positioned at reflective plate 203 focal point vicinity, and for example can overlap with reflective plate 203 along the direction perpendicular to display screen 201 on the center line of the projection of display screen 201, but not at the focal point of reflective plate 203 ), in this case, the reflectivity of the reflective film needs to be matched according to the relative position of the light bar 202 and the reflective plate 203 (that is, the amount of light irradiated to various places on the reflective plate 203), so as to ensure that it is reflected to each part of the display screen 201 Uniformity of light at the place.

In the display device provided in this embodiment, the reflecting plate may preferably have another structure. Specifically, as shown in FIG. 5, the display device is also spliced by two display screens 501, and its reflector 503 is preferably a bent flat plate structure, and the light bar 502 is preferably perpendicular to the bending line of the reflector 503. The projections on the display screen 501 in the direction of the display screen 501 overlap.

In this embodiment, the radial light emitted from the light bar 502 is reflected by the bent reflector to become parallel light or nearly parallel light, and reaches all parts of the display screen 501, and the bending line of the light bar 502 and the reflector 503 is perpendicular to The projections on the display screen 501 in the direction of the display screen 501 overlap, so that the structure of the display device is symmetrical with respect to the light bar 502, thereby ensuring the uniformity of the light reaching the display screen 501 and providing suitable light for the display screen. . Since the parts to be spliced are only the display screen 501 and do not include a backlight source, the thickness of the splicing material and the limit of the connection strength are reduced, so that the width of the structure connecting the two display screens 501 can be extremely narrow, and finally reduced Seam width.

In the above-mentioned display device, the reflective plate 503 preferably has a reflective film on the side facing the display screen 501, so as to enhance the reflection of the reflective plate and improve the brightness of the display screen 501; The folds increase to both sides to compensate for the loss of light received by the reflective plate 503 that is far away from the light bar 502, balance the amount of light reflected to various parts of the display screen 501, and improve the uniformity of optical brightness at all parts of the display screen sex.

It should be noted that the light bar described in this embodiment is preferably an LED (Light Emitting Diode, light-emitting diode) light bar, so as to provide high-brightness light for displaying images on the display screen 501 .

As shown in FIG. 6 , the display device provided by this embodiment may further include: a support member 601 disposed at the seam between two display screens 201 , and the light bar 202 is preferably disposed on the support member 601 Above: the outer frame 603 arranged on the front of the display screen 201 , the outer frame 603 has a frame structure corresponding to the display screen 201 one-to-one, so as to cooperate with the support member 601 to fix the edge of each display screen 201 .

Specifically, the support member 601 has a recessed structure. When assembling, the edge of the display screen 201 is placed in the recess, and the upper part is packaged by the outer frame 603, so that the outer frame 603 and the support member 601 form a groove to prevent the display screen 201 from The L-shaped edge of the outer frame 603 (also can be other shapes, as long as it can achieve the purpose of fixing) is used to support the structure of the display screen 201 and the L-shaped ( Other shapes can also be used, as long as the purpose of fixing can be achieved) Edge connection is used to fix the outer frame 603 and the support member 601 together, so as to realize the fixing of the display screen 201 .

In this embodiment, there is preferably a groove on the support member 601; the display device may further include: at least one layer of optical film 602 arranged between the display screen 201 and the reflector 203, and the edge of the optical film 602 is embedded in the support member 601 for fixing, and the setting of the optical film 602 can further improve the brightness of the display screen 201, and enhance the uniformity of the brightness of the display screen, and improve the picture display effect. The optical film 602 may preferably include a reflection film, an anti-reflection film, a diffusion film, etc., and may be designed according to actual conditions.

It should be noted that, on both sides of the display screen 201 perpendicular to the light bar 202, it is preferable to set a flat plate respectively. Closed structure to prevent light leakage, improve light utilization, and enhance screen brightness.

Embodiment Three

Based on the first embodiment, this embodiment provides a display device including at least three display screens. Wherein, the light bar of the display device is preferably located at the splicing seam between every two adjacent rows of display screens and/or at the splicing seam between every two adjacent columns of display screens.

Specifically, as shown in FIG. 7, the display device is formed by splicing at least three display screens 701, and the light bar 702 is preferably located at the splicing seam between every two adjacent rows or every two adjacent columns of display screens 701. , the reflecting plate 703 is a structure in which a plurality of concave mirrors are connected end to end, and the light bars 702 are located at the focal points of the plurality of concave mirrors in one-to-one correspondence.

In this embodiment, the combination of the light bar 702 and the reflector 703 plays the role of a backlight source, and the principle of providing light for the display screen 701 on the display screen 701 is the same as that of the display device in which the reflector is a concave mirror structure in Embodiment 2. Here No longer.

The display device provided in this embodiment utilizes the combination of the light bar 702 and the reflector 703 to provide uniform parallel light or approximately parallel light everywhere on the display screen 701, ensuring the normal display of the picture, which is equivalent to combining each display module The display screen is separated from the backlight source, so that the backlight sources of multiple display screens are fused together, so that the only part to be spliced is the display screen 701, thus reducing the thickness of the splicing material and the limit of the connection strength, making it possible to connect two display screens The width of the structure of 701 can be made extremely narrow, which ultimately reduces the width of the seam.

As shown in FIG. 8 , in this embodiment, regarding the setting of the light bar 702 , taking the display devices spliced according to the specification of 4×3 (that is, having three rows and four columns of display screens 701 ) as an example, the light bar 702 can preferably be located at The three stitching seams along the column direction (at this time, the section of the display device along the row direction can be referred to in Figure 7), or it can be located at the two stitching seams along the row direction, so that the display device has a symmetrical structure, further ensuring The uniformity of the light reaching the display screen 701 is ensured.

In order to enhance the reflective effect of the reflective plate, increase the brightness of the display screen, and at the same time ensure easy implementation and low production cost in the process, a reflective film is preferably provided on the side of the reflective plate 703 facing the display screen 701 in this embodiment.

The reflectance of each part of the reflective film may be the same or different. In this embodiment, if the light bar 702 is located at the focal point of the reflector 703, the light reflected by the reflector 703 is incident in parallel or approximately parallel, which can better ensure the uniformity of the optical brightness of the display screen 701, so that the reflection of the reflective film everywhere The ratio can preferably be set to be the same; considering that in the actual small unit composed of each light bar 702 and the corresponding concave mirror structure, the brightness of the area near the display screen 701 to the light bar 702 will be higher than the brightness of the area near the light bar 702 The brightness of the farther area is high, so it is preferable to set the reflectivity of the reflective film closer to the light bar 702 to be lower than that of the reflective film farther from the light bar 702 to balance the reflection to the display screen 702 The amount of light in each region on the screen further improves the uniformity of the optical brightness of the display screen 702 .

It should be noted that, in other embodiments of the present invention, the lamps 702 may not be located at the focal points of multiple concave mirrors in one-to-one correspondence (for example, they may be located near the focal points of multiple concave mirrors in one-to-one correspondence, or they may be One-to-one correspondence with the reflection plate 703 along the direction perpendicular to the display screen 701 on the projection center line of the display screen 701 overlaps, but not at the focal point), at this time the reflectivity of the reflection film needs to be based on the light bar 702 and the reflection The relative position of the plate 703 (that is, the amount of light irradiated to various places on the reflective plate 703 ) is matched to ensure the uniformity of light reflected to various places on the display screen 701 .

The reflective plate of the display device provided in this embodiment may preferably have another structure. Specifically, as shown in FIG. 9 , the display device is composed of at least three display screens 901 spliced together, and the light bar 902 is located at the splicing seam between every two adjacent rows or every two adjacent columns of display screens 901 , The reflector 903 is a structure in which a plurality of bent flat plates are connected end to end, and the light bar 902 is in one-to-one correspondence with the bending lines of the bent flat plates (that is, the V-shaped plate) along the direction perpendicular to the display screen 901 to display The projections on the screen overlap.

In the above-mentioned display device, a plurality of light strips 902 and a reflection plate 903 composed of a plurality of bent flat plates connected end-to-end play the role of a backlight source. The principle of the display device in which the plate 903 is a bent planar plate structure is the same, and will not be repeated here.

The above-mentioned display device uses the joint action of the light bar 902 and the reflector 903 to provide parallel light for the display screen 901 display screen. This structure integrates the backlight sources of multiple display modules, so that the spliced parts are only the display screen 901, thereby reducing the thickness of the splicing material and the limit of the connection strength, so that the width of the structure connected to the display screen 901 can be extremely narrow, and the purpose of reducing the width of the splicing seam is achieved.

In order to enhance the reflective effect of the reflector 903, the above-mentioned reflector 903 formed by connecting end to end of a plurality of bent planar plates can preferably have a reflective film on the side facing the display screen 901; in order to improve the uniformity of the optical brightness of the display screen 901 The reflectivity of the reflective film can preferably increase from the bend of each bent planar plate to both sides.

The display device provided in this embodiment may also preferably include: a support component arranged at the seam between every two adjacent display screens, the light bar may preferably be arranged on the support component, and the support component is used to support Display screen and light bar; the outer frame arranged on the front of the display device, the outer frame has a frame structure corresponding to the display screen one by one, to cooperate with the support component to fix the edge of each display screen, and prevent the display screen from falling out of the support component .

In addition, the support member preferably has a groove; the display device preferably further includes: at least one layer of optical film disposed between the display screen and the reflector, and the edge of the optical film is embedded in the groove of the support member for fixing. The optical film can further increase the brightness of the display screen, and enhance the uniformity of the brightness of the display screen, and improve the display effect of the screen. The optical film may preferably include a reflective film, an anti-reflection film, a diffusion film, etc., and may be designed according to actual conditions.

It should be noted that the display device provided in this embodiment is preferably a liquid crystal display device, in order to realize a large-size display with the advantages of ultra-long life, large viewing angle, high resolution, ultra-thin and lightweight, low power consumption, and low failure rate. The device provides important safeguards.

The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention are all Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (12)

1. A display device, comprising a plurality of display screens arranged in an array, with a splicing seam between two adjacent display screens, characterized in that the display device also includes: A light bar arranged at the seam; A reflective plate arranged on the back of the display screen, the reflective plate reflects the light emitted by the light bar, so that the light incident on the various parts of the display screen is parallel light. 2. The display device according to claim 1, wherein the light bar is located at the seam between every two adjacent rows of the display screens and/or is located at every two adjacent columns of the display screens seam between. 3. The display device according to claim 1, further comprising: a support member arranged at the seam between every two adjacent display screens, and the light bar is arranged on the support on parts; The outer frame arranged on the front of the display screen, the outer frame has a frame structure corresponding to the display screens one by one, so as to cooperate with the support component to fix the edge of each display screen. 4. The display device according to claim 2, characterized in that, the support member has a groove; The display device further includes: at least one layer of optical film disposed between the display screen and the reflective plate, and the edge of the optical film is embedded in the groove of the supporting component for fixing. 5. The display device according to any one of claims 1-4, wherein if the display device is formed by splicing two display screens, the reflector is a concave mirror structure, and the lamp A strip is located at the focal point of the reflector. 6 . The display device according to claim 5 , wherein a reflective film is provided on the side of the reflective plate facing the display screen, and the reflectivity of the reflective film is the same everywhere. 7 . 7. The display device according to any one of claims 1-4, wherein if the display device is formed by splicing two display screens, the reflector is a bent flat plate structure, The light bar overlaps with the projection of the bending line of the reflecting plate on the display screen in a direction perpendicular to the display screen. 8. The display device according to claim 7, wherein a reflective film is provided on the side of the reflective plate facing the display screen, and the reflectivity of the reflective film extends from the bend of the reflective plate to both sides. side increments. 9. The display device according to any one of claims 1-4, wherein if the display device is spliced by at least three display screens, and the light bars are located in every two adjacent rows or At the splicing seam between every two adjacent columns of the display screens, the reflector is a structure in which a plurality of concave mirrors are connected end to end, and the light bars are located at the focal points of the plurality of concave mirrors in one-to-one correspondence . 10 . The display device according to claim 9 , wherein a reflective film is provided on a side of the reflective plate facing the display screen, and the reflectivity of the reflective film is the same everywhere. 11 . 11. The display device according to any one of claims 1-4, wherein if the display device is spliced by at least three display screens, and the light bars are located in every two adjacent rows or At the seam between every two adjacent columns of the display screens, the reflector is a structure in which a plurality of bent flat plates are connected end to end, and the light bars correspond to the plurality of bent planes one by one. The projections of the bending lines of the planar plates on the display screen in a direction perpendicular to the display screen overlap. 12. The display device according to claim 11, wherein a reflective film is provided on the side of the reflective plate facing the display screen, and the reflectivity of the reflective film on each of the bent flat plates ranges from The bends of the bent planar plate gradually increase toward both sides.