WO2021031578A1

WO2021031578A1 - Display apparatus

Info

Publication number: WO2021031578A1
Application number: PCT/CN2020/083712
Authority: WO
Inventors: 张继兵; 闫高宾
Original assignee: 海信视像科技股份有限公司
Priority date: 2019-08-19
Filing date: 2020-04-08
Publication date: 2021-02-25

Abstract

A display apparatus, comprising a light strip. The light strip comprises: a strip-shaped circuit board (10) and a plurality of light-emitting devices (20) located on the strip-shaped circuit board (10); the light-emitting devices (20) are arranged along the extension direction of the strip-shaped circuit board (10); emergent light of the light emitting devices (20) forms light spots on the strip-shaped circuit board (10); and a plurality of light-absorbing portions (30) that are separated from each other are provided within light spot regions located on both sides of the light emitting devices (20) in the extension direction of the strip-shaped circuit board (10), and the light-absorbing portions (30) are used to absorb incident light. The light-absorbing portions (30) are provided within the light spot regions on both sides of the light emitting devices (20) along the extension direction of the strip-shaped circuit board (10), and may absorb an appropriate amount of light having larger energy density within the light spot regions so as to reduce the amount of light reflected to a side facing away from the strip-shaped circuit board (10), thereby making the emission brightness of the light strip uniform in the extension direction, and avoiding the occurrence of bright bands directly above the light strip.

Description

A display device

Cross reference to related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on August 19, 2019, the application number is 201910762875.8, and the invention title is "a display device", and it is filed with the Chinese Patent Office on August 19, 2019. The priority of the Chinese patent application whose application number is 201921342677.8 and the invention title is "a display device", the entire content of which is incorporated in this application by reference.

Technical field

This application relates to the field of display technology, and in particular to a display device.

Background technique

The liquid crystal display panel is a non-self-luminous type display panel, which needs to be matched with a backlight module to provide backlight to realize image display. According to the structure of the backlight module, it is divided into a direct-type backlight module and an edge-type backlight module. Direct-lit backlight modules are widely used in LCD TVs due to the advantages of good light-emitting viewing angle, high utilization, simple structure, and low cost.

With the market competition of LCD TVs, continuous optimization of the cost of low-end models has become the main trend of each module. Measures such as exempting the screen printing of the diffuser and reducing the number of light bars have become the design direction. However, due to the requirements of the module's rigid optical indicators, it is necessary to keep the total luminous flux constant while reducing the number of light bars, which results in an increase in the number of lamp beads arranged on a single light bar and a reduction in the distance between the lamp beads. In order to avoid dark bands between the light bars, the lens divergence angle needs to be increased, and the lens light type is axisymmetrically distributed, which leads to superimposition of brightness in the extending direction of the light bars, forming a bright band directly above the light bars.

Summary of the invention

The application provides a display device to eliminate the bright band above the light bar.

The present application provides a display device. The display device includes a light bar, and the light bar includes: a bar-shaped circuit board and a plurality of light-emitting devices on the bar-shaped circuit board;

The light-emitting devices are arranged along the extending direction of the strip-shaped circuit board; the light emitted by the light-emitting devices forms a light spot on the strip-shaped circuit board;

A plurality of separate light absorption parts are provided in the light spot areas on both sides of the light emitting device in the extending direction of the strip-shaped circuit board, and the light absorption parts are used for absorbing incident light.

In some embodiments, in the above-mentioned display device provided in the present application, the distance between two adjacent light-emitting devices is less than 80 mm.

In some embodiments, in the above-mentioned display device provided by the present application, the light-emitting device includes: a light-emitting diode and a reflective lens located on the light-emitting side of the light-emitting diode.

In some embodiments, in the above-mentioned display device provided by the present application, the distance between the light-emitting device and the closest light-absorbing part is 5-10 mm.

In some embodiments, in the above-mentioned display device provided in the present application, the distribution density of the light absorption portion increases as the light energy density of the light-emitting device incident on the strip circuit board in this area increases. Big.

In some embodiments, in the above-mentioned display device provided in the present application, the shape of the light-absorbing portion is one or a combination of a dot, a square, an arc, and a bar.

In some embodiments, in the above-mentioned display device provided by the present application, the shape of the light-absorbing portion is a strip shape, the light-absorbing portion is a strip-shaped light-absorbing portion, and the extending direction of the strip-shaped light-absorbing portion is the same as that of the strip shape. The extension directions of the circuit boards are perpendicular to each other;

The strip-shaped light-absorbing part has a width of 1-2 mm along the extending direction;

The width of the strip-shaped light-absorbing part along the extending direction is less than or equal to the distance between the strip-shaped light-absorbing part and the adjacent strip-shaped light-absorbing part.

In some embodiments, in the above-mentioned display device provided in this application, the display device further includes: a reflective sheet located on the same side of the strip circuit board as the light-emitting device;

The reflective sheet includes a plurality of strip-shaped openings corresponding to each of the light-emitting devices, the extending direction of the strip-shaped opening is the same as the extending direction of the strip-shaped circuit board, and the strip-shaped opening exposes the light-emitting device. The area where the light-absorbing parts on both sides of the device and the light-emitting device are located.

In some embodiments, in the above-mentioned display device provided in the present application, the width of the connecting area between two adjacent bar-shaped openings along the extending direction of the bar-shaped opening is 5-8 mm.

In some embodiments, in the above-mentioned display device provided in the present application, the distance between two adjacent light bars is 200-260 mm.

The beneficial effects of this application are as follows:

The display device provided by the present application includes a light bar. The light bar includes: a strip-shaped circuit board and a plurality of light-emitting devices on the strip-shaped circuit board; the light-emitting devices are arranged along the extending direction of the strip-shaped circuit board; A light spot is formed on the strip-shaped circuit board; in the light spot area on both sides of the light-emitting device in the extending direction of the strip-shaped circuit board, a plurality of separate light-absorbing parts are arranged, and the light-absorbing parts are used to absorb incident light. Since the distance between two adjacent light-emitting devices is small, the light spots incident on the strip-shaped circuit board will overlap, and the light intensity in this part of the area is relatively large. In the embodiment of the present application, the light-absorbing part is arranged along the light-emitting device. In the light spot areas on both sides of the strip-shaped circuit board extending direction, the light in the area with greater intensity of the light spot can be absorbed appropriately, thereby reducing the light reflected to the side away from the strip-shaped circuit board, thereby making the light bar The output brightness in the extension direction is uniform, avoiding bright bands directly above the light bar.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present application more clearly, the following will briefly introduce the drawings needed in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings.

FIG. 1 is a schematic diagram of the structure of a backlight module in the prior art;

2 is a schematic top view of the structure of the light bar provided by the embodiment of the application;

3 is a schematic diagram of the structure of a light emitting device provided by an embodiment of the application;

4 is a schematic diagram of the light intensity distribution of the emitted light of the light emitting device provided by the embodiment of the application;

FIG. 5 is a schematic diagram of an exit light path of a light emitting device provided by an embodiment of the application;

FIG. 6 is one of the structural schematic diagrams of the light absorption part provided by the embodiment of the application;

FIG. 7 is the second schematic diagram of the structure of the light absorption part provided by the embodiment of the application;

FIG. 8 is the third structural diagram of the light absorption part provided by the embodiment of the application;

FIG. 9 is one of the schematic top view structures of the backlight module provided by the embodiment of the application;

FIG. 10 is a schematic diagram of a top view structure of a reflective sheet provided by an embodiment of the application;

FIG. 11 is one of the partial top view structural schematic diagrams of the backlight module provided by the embodiment of the application;

FIG. 12 is the second partial top view structural diagram of the backlight module provided by the embodiment of the application.

detailed description

In order to make the purpose, technical solutions and advantages of the application more clear, the application will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all of them. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of this application.

In order to reduce the production cost of liquid crystal display devices, it is necessary to reduce the number of light bars installed in the backlight module. While reducing the number of light bars, it is still necessary to keep the total luminous flux constant, which requires more installations on a single light bar. Of light-emitting devices. The top view structure of the backlight module shown in FIG. 1 includes two light bars extending along the x direction, and the two light bars are arranged along the y direction. The distance between two light bars is b. In order to reduce the number of light bars, more light-emitting devices need to be arranged on a single light bar, so that the distance a between adjacent light-emitting devices in the x direction is reduced. As a result, the emitted light spots of two adjacent light-emitting devices overlap seriously in the x direction, so that the brightness of the light bar in the extending direction x is superimposed, and a bright band extending in the x direction is formed directly above the light bar.

In order to overcome the above-mentioned problems, an embodiment of the present application provides a display device including a light bar. As shown in FIG. 2, the light bar includes: a strip-shaped circuit board 10 and a plurality of light-emitting devices on the strip-shaped circuit board 10 20; Among them, the light-emitting devices 20 are arranged along the extending direction of the strip-shaped circuit board 10; the light emitted by the light-emitting devices 20 forms a spot on the strip-shaped circuit board 10; the light spots located on both sides of the light-emitting device 10 in the extending direction of the strip-shaped circuit board 10 A plurality of separate light-absorbing parts 30 are provided in the area, and the light-absorbing parts are used to absorb incident light.

Since the distance between two adjacent light-emitting devices 20 is relatively small, the light spots incident on the driving circuit board 10 will overlap, and the light intensity in this part of the area is relatively large. However, in the embodiment of the present application, the light-absorbing part 30 is arranged at In the light spot areas on both sides of the light emitting device 20 along the extending direction of the strip circuit board 10, the light in the area where the light energy density of the light spot is higher can be absorbed appropriately, thereby reducing the light reflected to the side away from the strip circuit board 10 , Thereby making the light bar in the extension direction of the emitted brightness uniform, avoiding bright bands directly above the light bar.

The distance between two adjacent light-emitting devices 20 in the light bar provided by the embodiment of the present application is less than 80 mm. By reducing the arrangement distance of the light-emitting devices, more light-emitting devices can be arranged on a light bar to increase the luminous flux of a single light bar. However, when the distance between two adjacent light-emitting devices on the light bar is less than 80 mm, a large range of light spots overlaps, which causes the problem of a bright band above the light bar. The light absorbing part 30 is arranged in the light spot area, and by adjusting the distribution density of the light absorbing part, the light in the area with larger energy density of the light spot can be absorbed appropriately, thereby reducing the light reflected to the side away from the strip circuit board 10. This makes the emission brightness of the light bar in the extending direction uniform, and avoids bright bands directly above the light bar.

In the above-mentioned light bar provided by the embodiment of the present application, as shown in FIG. 3, the light-emitting device includes: a light-emitting diode 201 and a reflective lens 202 on the light-emitting side of the light-emitting diode 201. The reflective lens 202 includes a light-incident surface L1, a total reflection surface L2, and a light-emitting surface L3; the light-incident surface L1 constitutes a half-closed accommodating space, and the light emitting diode 201 is disposed in the accommodating space. The light emitted by the light emitting diode 201 is incident on the light-incident surface L1, the light-incident surface L1 refracts the light to the total reflection surface L2, and the total reflection surface L2 reflects the light to the light-emitting surface L3 and is emitted from the light-emitting surface. The light distribution of the light emitting device using the reflective lens is shown in Figure 3. When a light-emitting device with a reflective lens is used as the light source on the light bar, it needs to be used with a reflective sheet. The reflective sheet is generally arranged at the bottom of the light-emitting device 20, and the light emitted by the light-emitting device 20 will first irradiate the surface of the reflective sheet, and then be reflected and transmitted directly above through the reflective sheet as an exit light source.

The light intensity distribution of the light spot formed on the detection surface directly above the light-emitting device detected by the embodiment of the application is shown in FIG. 4, where the horizontal axis 0 point in FIG. 4 represents the position of the center of the light-emitting diode, and the horizontal axis coordinates represent The relative distance from the center of the LED, the vertical axis represents the relative light intensity at different positions of the light spot. It can be seen from Figure 4 that the relative light intensity in the area near the center 0 of the light-emitting diode on the reflector/strip circuit board is relatively weak, while the relative light intensity in the range of 50-100 mm from the center is relatively strong. The outgoing light spot is a center-symmetric structure, and the light spot on the detection surface is formed by the reflected light of the reflector. Therefore, the light spot formed on the detection surface can reflect the light of the light-emitting device incident on the reflector/strip circuit board. Strong distribution, and the light-emitting device emits to the position of the reflector/strip circuit board with strong light intensity, which also causes the reflected light intensity to be greater. In order to reduce the reflection of this part of the light, the relative light intensity can be on the strip circuit board The above-mentioned light-absorbing part 30 is arranged at a stronger position, and the distribution density of the light-absorbing part 30 matches the relative light intensity of the light spot. After the light-absorbing part 30 is provided, the light emission of the light-emitting device is shown in FIG. 5, the light emitted by the reflective lens 202 to the light-absorbing part is absorbed by the light-absorbing part 30, and the light emitted in other areas can still go above the light-emitting device Reflect, thus can absorb the light in the area where the light energy density of the spot is relatively large, and avoid the bright band directly above the light bar.

In specific implementation, the distance between the light-emitting device 20 and the closest light-absorbing part 30 is 5-10 mm. Taking into account the structure of the light-emitting device 20, the light emitted by the light-emitting device 20 onto the strip circuit board 10 will start to increase in intensity within a range of 5-10 mm from the edge of the light-emitting device 20, so light absorption can be set in this range. Section 30, and adjust the setting density of the light absorption section according to the distribution of light intensity.

In the embodiment of the present application, the setting area of the light absorption part is the area corresponding to the light intensity in the light spot area where the light intensity is greater than the average light intensity. In the actual operation process, the energy distribution of the light-emitting device without the light-absorbing part 30 can be detected first, and the light intensity distribution diagram of the light-emitting device as shown in FIG. 4 is obtained, and the average light intensity is calculated according to the detected light intensity distribution. The relative light intensity value m in represents the average light intensity level, then the area corresponding to the relative light intensity value greater than m can be provided with the above-mentioned light-absorbing part 30, and the number of light-absorbing parts 30 provided in the area with a higher relative light intensity is greater , The smaller the number of light absorbing parts 30 provided in the region with the lower relative light intensity. That is, the distribution density of the light absorption portion 30 increases as the light intensity density of the light-emitting device incident on the strip circuit board increases.

In practical applications, the strip-shaped circuit board can be a printed circuit board (PCB). The printed circuit board is coated with a layer of white ink except for the area where the light-emitting device is soldered. The white ink has a certain reflective effect. It is also possible to reflect the light incident from the light emitting device to the side away from the printed circuit board. Under normal circumstances, for product description or material differentiation, some identifying black characters are printed on the surface of the white ink of the PCB. Then the light absorbing part 30 can be made of black or gray ink like the black characters and formed in the stripe by the direction of the silk screen. Shaped circuit board.

In the above-mentioned light bar provided by the embodiment of the present application, the light-absorbing part 30 can be set as a circle as shown in FIG. 2, or as a square as shown in FIG. 6, or as an arc as shown in FIG. Or it can be set as a bar shape as shown in Fig. 8. When the light-absorbing part 30 is arranged in a dot shape or a square shape, the distribution on both sides of the light-emitting device is shown in Figures 2 and 6. It can be seen from Figures 2 and 6 that the light-absorbing part 30 is in the light-emitting device 20. The two sides present an approximately triangular distribution, and the top of the triangle points to the light-emitting device 20. This is because the light-emitting device using a reflective lens emits less light at the bottom edge position, and as the distance from the light-emitting device increases The light incident on the shaped circuit board increases and the intensity increases. Therefore, more light-absorbing parts need to be provided, and within a certain range, the light-absorbing parts present an approximately triangular distribution as shown in FIGS. 2 and 6.

Since the light spot on the drive circuit board at the bottom of the light-emitting device is a ring-shaped light spot, a number of arc-shaped or strip-shaped light-absorbing parts arranged in a ring shape can be used. The strip-shaped light-absorbing parts are relatively dot-shaped or block-shaped. For the light absorption part, the number of installations is much smaller, the processing difficulty is reduced, and the alignment is relatively easy. In addition, the strip-shaped light-absorbing part is easier to control when adjusting the position or width according to the light-emitting law of the light-emitting device.

Taking the strip-shaped light-absorbing part shown in Fig. 8 as an example, the extending direction of the strip-shaped light-absorbing part (30) and the extending direction of the strip-shaped circuit board 10 are perpendicular to each other, so that the strip-shaped light-absorbing part can be arranged along the ring of the light spot. By adjusting the spacing of the strip-shaped light-absorbing parts to achieve the purpose of changing the distribution density. Generally, the diameter of the reflective lens of the light-emitting device is about 17mm, and the amount of light emitted at the edge of the reflective lens is small, so the distance d1 between the first strip-shaped light-absorbing part (30) and the light-emitting device can be Set at 5-10mm. The width d2 of the vertical extension direction of the strip-shaped light-absorbing part can be set at 1-2mm. If the width d2 of the strip-shaped light-absorbing part is set too large, it will cause adhesion with the adjacent strip-shaped light-absorbing part during the screen printing process, and when the strip is light-absorbing When the width of the part is set too large, the number of strip-shaped light-absorbing parts that can be adjusted within a limited range becomes less, which is not conducive to the adjustment of the distribution width. The width d2 of the strip-shaped light-absorbing part (30) along the extending direction is less than or equal to the distance d3 between the strip-shaped light-absorbing part and the adjacent strip-shaped light-absorbing part. If the interval area between two adjacent strip-shaped light-absorbing parts is regarded as a strip-shaped spacer, the ratio of the area of the strip-shaped light-absorbing part to the total area of the strip-shaped light-absorbing part and the adjacent strip-shaped spacer is less than or equal to 50%, so the arrangement density of the strip-shaped light-absorbing parts is less than or equal to 50%.

On the other hand, an embodiment of the present application also provides a backlight module. As shown in FIG. 9, the backlight module provided by the embodiment of the present application includes at least one light bar 100 described above. In the above-mentioned backlight module provided by the embodiments of the application, the number of light bars used can be reduced, and the number of light-emitting devices on a single light bar can be increased. Even if the distance between adjacent light-emitting devices is reduced, the light-emitting devices extend along the strip-shaped circuit board. There are light-absorbing parts in the light spot area on both sides of the direction, which can absorb the light in the area with higher light energy density of the light spot, so as to reduce the light reflected to the side away from the strip-shaped circuit board, thereby making the light bar extend The output brightness in the direction is uniform, avoiding the bright band directly above the light bar.

In specific implementation, the backlight module further includes: a reflective sheet 40 on the same side of the driving circuit board 10 as the light-emitting device 20. The structure of the reflective sheet 40 is shown in FIG. 10, and the reflective sheet 40 includes a plurality of strip-shaped openings 401, such as As shown in FIG. 11, each strip-shaped opening 401 corresponds to each light-emitting device 20, and the extending direction of the strip-shaped opening 401 is the same as that of the strip-shaped circuit board 10. The strip-shaped opening 401 exposes the light-emitting device 20 and two of the light-emitting device. The area where the light-absorbing part 30 on the side is located.

The openings of the reflective sheet provided in the above-mentioned backlight module provided by the embodiments of the present application are strip-shaped openings, and the purpose of this arrangement is to expose the light-emitting device and the light-absorbing parts provided on both sides of the light-emitting device, as shown in FIG. 10 The strip-shaped opening 401 is composed of a square opening in the center and a rectangular opening extending from the square opening to both sides, and the width of the square opening in the center perpendicular to the extending direction of the strip-shaped circuit board is greater than the width of the extending rectangular opening , The square opening is used to expose the light emitting device, and the extended rectangular opening is used to expose the light absorption part. The square opening is adopted at the position of the light-emitting device, which is more suitable for re-reflection of the light emitted by the light-emitting diode after passing through the reflective lens, and matches the light shape formed by the reflective lens. The light absorption part is arranged in the strip-shaped opening, so that the emitted light in the area with high light energy density is absorbed in an appropriate amount, reducing the light reflected to the side away from the driving circuit board, and avoiding excessive superposition of the reflected light to form a bright band.

In practical applications, considering that the spacing of light-emitting devices is generally less than 80mm, the spacing between two adjacent light bars can be 200-260mm, so even if the number of light bars is small, the backlight module can still emit The total luminous flux remains unchanged, and the reduction in the number of light bars can reduce costs.

As mentioned above, the light-absorbing part needs to be provided in the areas on both sides of the light emitting device more than 5-10mm away from the edge, so the width of the connecting area between two adjacent strip-shaped openings can be adjusted along the extending direction of the strip-shaped opening on the reflector. Set around 5-8mm. The connecting area acts as a limit and restraint of the light bar. If it is set too narrow, the limit effect will be poor; if it is set too wide, it will occupy a large space and hinder the design of the light absorption part. After experimental testing, it is more appropriate to set the width of the above-mentioned connection area to a width of 5-8mm.

In some embodiments, the opening of the reflective sheet can also be configured as shown in FIG. 12. The reflective sheet includes: a first opening 402 and a second opening 403, wherein the first opening 402 exposes the area where the light emitting device is located, and the second The two openings 403 expose the area where the light absorption part is located. Since the light intensity of the area near the outer edge of the light-emitting device is weak, the reflector will not cause light reflection at this position. The use of such a reflector structure can still limit the light bar, and the adjacent first The width of the connecting area between one opening and the second opening can still be set at 5-8 mm.

It should be noted that the above numerical ranges provided in the embodiments of the present application are all set in consideration of the size and structure of the light-emitting device actually used, and the energy distribution of the exiting spot. In actual applications, other sizes, structures, or output are used as needed. When the light emitting device is a light emitting device, it is necessary to adaptively adjust the installation position and distribution density of the light absorbing part, which is not limited here, and all related and modified technical solutions that adopt the concept of this application belong to the protection scope of this application.

In specific implementation, the above-mentioned backlight module provided by the embodiments of the present application further includes a back plate and a plastic frame arranged around the back plate. The back plate and the plastic frame form an accommodating space, and the light bar is arranged in the accommodating space. In addition, the backlight module also includes an optical film such as a diffuser that is arranged on the side of the reflector away from the back plate and is at a set distance from the reflector. The distance between the reflector and the diffuser needs to be based on the location of the light-emitting device. Adjust the required mixing distance.

The above-mentioned display device provided by the present application includes any of the above-mentioned backlight modules and a display panel on the light-emitting side of the backlight module. The display device can be a display device such as a liquid crystal panel, a liquid crystal display, and a liquid crystal TV; it can also be a mobile terminal such as a mobile phone, a tablet computer, and a smart album. Since the principle of solving the problems of the display device is similar to that of the above-mentioned backlight module, the implementation of the display device can refer to the implementation of the above-mentioned backlight module, and the repetition will not be repeated.

The display device provided by the embodiment of the present application includes a light bar. The bar shape includes: a bar-shaped circuit board and a plurality of light-emitting devices on the bar-shaped circuit board; the light-emitting devices are arranged along the extending direction of the strip-shaped circuit board; the light emitted by the light-emitting devices A light spot is formed on the strip-shaped circuit board; a plurality of separate light-absorbing parts are arranged in the light spot areas on both sides of the light-emitting device in the extending direction of the strip-shaped circuit board, and the light-absorbing parts are used to absorb incident light. Since the distance between two adjacent light-emitting devices is small, the light spots incident on the strip-shaped circuit board will overlap, and the light intensity in this part of the area is relatively large. In the embodiment of the present application, the light-absorbing part is arranged along the light-emitting device. In the light spot areas on both sides of the strip-shaped circuit board extending direction, the light in the area with larger light energy of the light spot can be absorbed appropriately, thereby reducing the light reflected to the side away from the strip-shaped circuit board, thereby making the light bar The output brightness in the extension direction is uniform, avoiding bright bands directly above the light bar.

Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application also intends to include these modifications and variations.

Claims

A display device comprising a light bar,

The light bar includes: a bar-shaped circuit board and a plurality of light-emitting devices on the bar-shaped circuit board;

The light-emitting devices are arranged along the extending direction of the strip-shaped circuit board; the light emitted by the light-emitting devices forms a light spot on the strip-shaped circuit board;

A plurality of separate light absorption parts are provided in the light spot areas on both sides of the light emitting device in the extending direction of the strip-shaped circuit board, and the light absorption parts are used for absorbing incident light.
The display device of claim 1, wherein the distance between two adjacent light-emitting devices is less than 80 mm.
8. The display device of claim 1, wherein the light-emitting device comprises: a light-emitting diode and a reflective lens on the light-emitting side of the light-emitting diode.
8. The display device of claim 1, wherein the distance between the light-emitting device and the light-absorbing part that is closest to it is 5-10 mm.
8. The display device according to claim 1, wherein the distribution density of the light absorption portion increases as the light energy density of the light emitting device incident on the strip circuit board in the area increases.
8. The display device of claim 1, wherein the shape of the light-absorbing portion is one or a combination of a dot, a square, an arc, and a bar.
7. The display device of claim 6, wherein the shape of the light-absorbing portion is a strip shape, the light-absorbing portion is a strip-shaped light-absorbing portion, and the extending direction of the strip-shaped light-absorbing portion is the same as that of the strip-shaped circuit board. The extension directions are perpendicular to each other;

The strip-shaped light-absorbing part has a width of 1-2 mm along the extending direction;

The width of the strip-shaped light-absorbing part along the extending direction is less than or equal to the distance between the strip-shaped light-absorbing part and the adjacent strip-shaped light-absorbing part.
7. The display device according to any one of claims 1-7, wherein the display device further comprises: a reflective sheet located on the same side of the strip circuit board as the light-emitting device;

The reflective sheet includes a plurality of strip-shaped openings corresponding to each of the light-emitting devices, the extending direction of the strip-shaped opening is the same as the extending direction of the strip-shaped circuit board, and the strip-shaped opening exposes the light-emitting device. The area where the light-absorbing parts on both sides of the device and the light-emitting device are located.
8. The display device of claim 8, wherein the width of the connecting area between two adjacent bar-shaped openings along the extending direction of the bar-shaped opening is 5-8 mm.
9. The display device of claim 9, wherein the distance between two adjacent light bars is 200-260 mm.