CN117289813A - Backlight assembly - Google Patents
Backlight assembly Download PDFInfo
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- CN117289813A CN117289813A CN202210774868.1A CN202210774868A CN117289813A CN 117289813 A CN117289813 A CN 117289813A CN 202210774868 A CN202210774868 A CN 202210774868A CN 117289813 A CN117289813 A CN 117289813A
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- 230000000903 blocking effect Effects 0.000 claims description 7
- 238000002955 isolation Methods 0.000 abstract description 6
- 238000005452 bending Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000001795 light effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Planar Illumination Modules (AREA)
- Push-Button Switches (AREA)
Abstract
A backlight assembly includes a reflective sheet, a light shielding sheet, first and second light emitting elements, and a light guide plate. The reflector is arranged on the circuit board and provided with a first through hole and a second through hole. The shading sheet is arranged on the reflecting sheet and is provided with a hollowed-out part. The hollowed-out part is provided with a closed contour. The first and second light emitting elements are arranged on the circuit board, respectively accommodated in the first and second through holes and positioned in the hollowed-out part. The light guide plate is embedded in the hollowed-out part and comprises a first light guide area and a second light guide area. The first light guide area is provided with a first light equalizing area and a first light emitting area. The first light-emitting element and the first light-emitting area are positioned on two opposite sides of the first light-equalizing area. The second light guide area is provided with a second light equalizing area and a second light emitting area. The second light-emitting element and the second light-emitting area are positioned at two opposite sides of the second light-equalizing area. The light shielding sheet is further provided with a light shielding part arranged between the first light guide area and the second light guide area. Therefore, the light isolation part of the light shielding sheet can isolate the light emitted by the first light emitting element and the light emitted by the second light emitting element without mutual interference, so that the first graph and the second graph on the cover plate can be independently displayed.
Description
Technical Field
The present disclosure relates to a backlight assembly, and more particularly, to a backlight assembly for a touch pad device.
Background
The shape of the conventional touch pad device is generally dull, so that manufacturers around the computer have developed a luminous touch pad device with excellent visual effect. The backlight assembly used in the conventional light-emitting touch panel device is composed of two parts, namely a light shielding sheet and a light guide plate from top to bottom.
With the increasing functions, the marks on the touch pad device are also more and more complex. If the key icons only share the same light guide plate, a single key icon cannot be displayed or marked independently. In order to enable each key diagram on the touch device to emit light individually, a light source is generally required to be disposed under each key diagram, which is a direct type light emitting design. However, the direct type light emitting design needs to have a fixed light mixing distance to emit light uniformly, but the light mixing distance can cause that the thickness of the touch device cannot be reduced, and the sensitivity of the touch sensor is reduced.
Therefore, how to provide a backlight assembly capable of solving the above problems is one of the problems to be solved by the development resources in the industry.
Disclosure of Invention
Accordingly, an object of the present disclosure is to provide a backlight assembly that can effectively solve the above-mentioned problems.
In order to achieve the above object, according to one embodiment of the present disclosure, a backlight assembly includes a reflective sheet, a light shielding sheet, a first light emitting element, a second light emitting element, and a light guide plate. The reflector plate is arranged on the circuit board and provided with a first through hole and a second through hole. The shading sheet is arranged on the reflecting sheet and is provided with a hollowed-out part. The hollowed-out part is provided with a closed contour. The first light-emitting element and the second light-emitting element are arranged on the circuit board, respectively accommodated in the first through hole and the second through hole and positioned in the hollowed-out part. The light guide plate is embedded in the hollowed-out part and comprises a first light guide area and a second light guide area. The first light guide area is provided with a first light equalizing area and a first light emitting area. The first light-emitting element and the first light-emitting area are positioned on two opposite sides of the first light-equalizing area. The second light guide area is provided with a second light equalizing area and a second light emitting area. The second light-emitting element and the second light-emitting area are positioned at two opposite sides of the second light-equalizing area. The light shielding sheet is further provided with a light shielding part arranged between the first light guide area and the second light guide area.
In one or more embodiments of the present disclosure, the first light emitting region and the second light emitting region respectively have a first light guiding pattern and a second light guiding pattern formed by a plurality of microstructures.
In one or more embodiments of the present disclosure, the backlight assembly further includes a cover plate disposed over the light guide plate and the light shielding sheet. The cover plate is provided with a reflecting layer on one side of the light guide plate. The cover plate is further provided with a first light guide pattern and a second light guide pattern which can transmit light and respectively vertically correspond to the first light guide pattern and the second light guide pattern.
In one or more embodiments of the disclosure, the thickness of the light shielding sheet is greater than the thickness of the light guide plate, the height of the first light emitting element, and the height of the second light emitting element.
In one or more embodiments of the disclosure, at least one of the first light emitting element and the second light emitting element is disposed on a wall surface of the hollow portion and configured to emit light toward the light isolation portion.
In one or more embodiments of the disclosure, at least one of the first light emitting element and the second light emitting element is disposed on a wall surface of the light-shielding portion and configured to emit light toward the light-shielding portion.
In one or more embodiments of the present disclosure, the light guide plate has a connection portion. The two ends of the connecting part are respectively connected with the first light guide area and the second light guide area.
In one or more embodiments of the present disclosure, the connecting portion has a bending portion.
In one or more embodiments of the present disclosure, the light-emitting surface of the first light-emitting device has a first width. The first light-equalizing area is a part within a first distance from the light incident surface of the first light guide area. The first distance is at least about 1.5 times the first width.
In one or more embodiments of the disclosure, the light emitting surface of the second light emitting element has a second width. The second light-equalizing area is a part within a second distance from the light incident surface of the second light guide area. The second distance is at least about 1.5 times the second width.
In summary, in the backlight assembly of the present disclosure, the first light emitting element and the second light emitting element emit light toward the first light guiding region and the second light guiding region of the light guiding plate, respectively. And the light guide plate is embedded in the hollowed-out part of the light shielding sheet, and the light isolation part of the light shielding sheet is arranged between the first light guide area and the second light guide area. Therefore, the light isolation part of the light shielding sheet can isolate the light emitted by the first light emitting element and the light emitted by the second light emitting element without mutual interference, so that the first graph and the second graph on the cover plate can be independently displayed. In some embodiments, at least one of the first light emitting element and the second light emitting element is disposed on a wall surface of the hollow portion and configured to emit light toward the light-blocking portion, or disposed on a wall surface of the light-blocking portion and configured to emit light away from the light-blocking portion. In some embodiments, the light guide plate has a connecting portion with two ends respectively connected to the first light guide region and the second light guide region, and the connecting portion has a bending portion. Therefore, the light emitted by the first light-emitting element can reach the second light guide area after more than two turns, or the light emitted by the second light-emitting element can reach the first light guide area after more than two turns, so that the light emitted by the first light-emitting element and the light emitted by the second light-emitting element can be more ensured not to interfere with each other. In addition, compared with the scattered light guide blocks, the first light guide area and the second light guide area are connected through the connecting part in the embodiment, so that the assembly and the alignment of the light guide plate can be facilitated.
The above description is merely illustrative of the problems to be solved by the present disclosure, the technical means for solving the problems, the effects thereof and the like, and the specific details of the present disclosure are set forth in the following description and related drawings.
Drawings
The foregoing and other objects, features, advantages and embodiments of the present disclosure will be apparent from the following description of the drawings in which:
FIG. 1 is a perspective view of an electronic device according to an embodiment of the disclosure;
FIG. 2 is a schematic cross-sectional view illustrating a backlight assembly and a circuit board according to an embodiment of the disclosure;
FIG. 3 is a front view of a light shielding sheet and a light guiding plate according to an embodiment of the disclosure;
FIG. 4 is a partial enlarged view illustrating the structure of FIG. 3;
FIG. 5 is a partial enlarged view illustrating a light shielding sheet and a light guiding plate according to another embodiment of the disclosure;
fig. 6 is a front view illustrating a light shielding sheet and a light guiding plate according to another embodiment of the disclosure.
[ symbolic description ]
100 electronic device
110 host computer
120 display device
130 backlight assembly
131 reflecting sheet
131a first through hole
131b second through hole
132,232,332, shading sheet
132a,232a,332a, hollowed-out parts
132b light-blocking portion
133 first light-emitting element
133a,134a light-emitting surfaces
134 second light-emitting element
135,235,335 light guide plate
135a first light guiding region
135a1, first light homogenizing region
135a11,135b11, light incident surface
135a2, first light-emitting region
135b second light guiding region
135b1 second light homogenizing region
135b2 second light-emitting region
135c,235c,335c connecting portion
135c1 bending part
136 cover plate
136a reflective layer
140 circuit board
GP1 first light guide pattern
GP2 second light guide pattern
P1 first pattern
P2:second figure
S1 first distance
S2 second distance
W1 first width
W2 second width
Detailed Description
Various embodiments of the present disclosure are disclosed in the following figures, in which numerous practical details are set forth in the following description for purposes of clarity. However, it should be understood that these practical details are not to be used to limit the present disclosure. That is, in some embodiments of the present disclosure, these practical details are not necessary. Furthermore, for the sake of simplicity of the drawing, some conventional structures and elements are shown in the accompanying drawings in a simplified schematic manner.
Referring to fig. 1, a perspective view of an electronic device 100 according to an embodiment of the invention is shown. As shown in fig. 1, in the present embodiment, the electronic device 100 includes a host 110, a display 120, and a touch pad device. The touch pad device is an input device disposed on the host 110, but the invention is not limited thereto. In practical applications, the touch pad device may also be an electronic product (e.g., a personal digital assistant, a keyboard … including a touch pad, etc.) using the touch pad as an input or operation interface. In other words, the concept of the touch pad device of the present invention can be applied to electronic products using Ren Heyi touch pads as input or operation interfaces. The structure, function and connection and actuation relationship of some of the elements included in the touch pad device will be described in detail below.
Please refer to fig. 2 and fig. 3. Fig. 2 is a schematic cross-sectional view illustrating a backlight assembly 130 and a circuit board 140 according to an embodiment of the disclosure. Fig. 3 is a front view illustrating the light shielding sheet 132 and the light guiding plate 135 according to an embodiment of the disclosure. As shown in fig. 2 and 3, in the present embodiment, the touch pad device is disposed in the host 110 and includes a backlight assembly 130 and a circuit board 140. The backlight assembly 130 is exposed from an opening of the housing of the host 110. The circuit board 140 may include touch control circuitry. The backlight assembly 130 includes a reflective sheet 131, a light shielding sheet 132, a first light emitting element 133, a second light emitting element 134, and a light guide plate 135. The reflective sheet 131 is disposed on the circuit board 140 and has a first through hole 131a and a second through hole 131b. The light shielding sheet 132 is disposed on the reflective sheet 131 and has a hollowed-out portion 132a. The hollowed-out portion 132a has a closed contour. The first light emitting element 133 and the second light emitting element 134 are disposed on the circuit board 140, respectively accommodated in the first through hole 131a and the second through hole 131b of the reflective sheet 131, and located in the hollow portion 132a of the light shielding sheet 132. The light guide plate 135 is embedded in the hollow portion 132a. The first light emitting element 133 and the second light emitting element 134 are configured to emit light laterally toward the light guide plate 135. Since the light guide plate 135 is embedded in the hollow portion 132a with a closed contour (representing that the light shielding plate 132 completely surrounds the outer edge of the light guide plate 135), the light transmitted in the light guide plate 135 is blocked by the light shielding plate 132 when reaching the outer edge of the light guide plate 135, so that no light leakage occurs. Since the bottom of the light guide plate 135 is provided with the reflective sheet 131, it is possible to ensure that light transmitted in the light guide plate 135 is emitted only from the top surface of the light guide plate 135.
As shown in fig. 2, in the present embodiment, the thickness of the light shielding sheet 132 is greater than the thickness of the light guide plate 135, the height of the first light emitting element 133, and the height of the second light emitting element 134. Thereby, lateral light leakage of the light transmitted in the light guide plate 135 can be further prevented.
In detail, the light guide plate 135 includes a first light guide region 135a and a second light guide region 135b. The first light guiding region 135a has a first light equalizing region 135a1 and a first light emitting region 135a2. The first light emitting element 133 and the first light emitting region 135a2 are laterally located at two opposite sides of the first light equalizing region 135a 1. The second light guiding region 135b has a second light equalizing region 135b1 and a second light emitting region 135b2. The second light emitting element 134 and the second light emitting region 135b2 are laterally located at two opposite sides of the second light equalizing region 135b 1. Therefore, the light emitted by the first light emitting element 133 can be uniformly mixed in the first light equalizing region 135a1, and then transmitted to the first light emitting region 135a2 for emitting. Similarly, the light emitted by the second light emitting element 134 may be uniformly mixed in the second light equalizing region 135b1, and then transmitted to the second light emitting region 135b2 for emitting. It should be noted that, the Hot spot phenomenon is a region with the strongest brightness in front of the light emitting source (e.g. light emitting diode), which has obvious bright line or bright arc problem when appearing on the light incident surface of the light guide plate, resulting in uneven brightness with obvious contrast of the overall light effect. Therefore, in the present embodiment, the light emitted by the first light emitting element 133 and the second light emitting element 134 is totally reflected in the first light equalizing region 135a1 and the second light equalizing region 135b1 for multiple times, so that the light equalizing effect can be achieved.
As shown in fig. 2, in the present embodiment, the first light emitting region 135a2 and the second light emitting region 135b2 have a first light guide pattern GP1 and a second light guide pattern GP2 formed by a plurality of microstructures, respectively. In addition, the backlight assembly 130 further includes a cover plate 136 disposed over the light guide plate 135 and the light shielding plate 132. The cover plate 136 is provided with a light reflecting layer 136a on a side facing the light guide plate 135. The reflective layer 136a may vertically correspond to the first light emitting device 133, the second light emitting device 134 and a portion of the light guide plate 135, so as to reflect the light scattered upwards back to the light guide plate 135, thereby increasing the light utilization rate. The cover plate 136 further has a first light-transmissive pattern P1 and a second light-transmissive pattern P2 respectively corresponding to the first light-guiding pattern GP1 and the second light-guiding pattern GP2. With this configuration, the light transmitted to the first light emitting region 135a2 is reflected upward by the first light guiding pattern GP1 and then exits the cover 136 through the first pattern P1 of the cover 136, so that the user can clearly recognize the first pattern P1 of the light emission. Similarly, the light transmitted to the second light emitting region 135b2 is reflected upward by the second light guiding pattern GP2 and then exits the cover 136 through the second pattern P2 of the cover 136, so that the user can clearly identify the illuminated second pattern P2. In some embodiments, the reflective layer 136a is disposed on a side of the cover plate 136 facing the light guide plate 135 except for the first pattern P1 and the second pattern P2, so as to increase the convenience of the process.
In some embodiments, the first light-equalizing region 135a1 is defined by an overlapping region of the front projection of the light-reflecting layer 136a on the first light-guiding region 135a, but the disclosure is not limited thereto. In some embodiments, the second light-equalizing region 135b1 is defined by an overlapping region of the front projection of the light-reflecting layer 136a on the second light-guiding region 135b, but the disclosure is not limited thereto.
Referring to fig. 4, an enlarged view of a portion of the structure of fig. 3 is shown. As shown in fig. 4, in the present embodiment, the light emitting surface 133a of the first light emitting element 133 has a first width W1. The first light equalizing region 135a1 is a portion within the first distance S1 from the light incident surface 135a11 of the first light guiding region 135 a. The first distance S1 is at least about 1.5 times the first width W1. Thus, the light emitted by the first light emitting element 133 can be sufficiently and uniformly mixed in the first light equalizing region 135a 1.
As shown in fig. 4, in the present embodiment, the light emitting surface 134a of the second light emitting element 134 has a second width W2. The second light equalizing region 135b1 is a portion within a distance from the light incident surface 135b11 of the second light guiding region 135b. The second distance S2 is at least about 1.5 times the second width W2. Thereby, the light emitted by the second light emitting element 134 can be sufficiently uniformly mixed in the second light equalizing region 135b 1.
In practical applications, as shown in fig. 3, the backlight assembly 130 may further add more/fewer light emitting elements, and the light guide plate 135 may further include more/fewer light guiding regions to respectively correspond to the light emitting elements.
As shown in fig. 2 and 3, in the present embodiment, the light shielding sheet 132 further includes a light shielding portion 132b. The light-blocking portion 132b protrudes laterally from the wall surface of the hollow portion 132a of the light-shielding sheet 132, and is disposed between the first light-guiding region 135a and the second light-guiding region 135b. Therefore, the light-blocking portion 132b of the light-shielding sheet 132 can separate the light emitted by the first light-emitting element 133 and the light emitted by the second light-emitting element 134 without interfering with each other, so that the first pattern P1 and the second pattern P2 on the cover 136 can be presented separately.
As shown in fig. 2 and 3, in the present embodiment, the first light emitting element 133 is disposed on the wall surface of the hollow portion 132a and configured to emit light toward the light blocking portion 132b. Therefore, the light emitted by the first light emitting element 133 must pass through the two or more turns (e.g. through the connection portion 135c with the bent portion 135c1 shown in fig. 3 and 4 and described below) before reaching the second light guiding region 135b (i.e. the light emitted by the first light emitting element 133 does not cause the second pattern P2 of the cover 136 to emit light), so that the light emitted by the first light emitting element 133 and the light emitted by the second light emitting element 134 can be more ensured not to interfere with each other.
As shown in fig. 2 and 3, in the present embodiment, the second light emitting element 134 is provided on the wall surface of the light blocking portion 132b, and is disposed to emit light away from the light blocking portion 132b. Therefore, the light emitted by the second light emitting element 134 must pass through the two or more turns (e.g. through the connection portion 135c with the bent portion 135c1 shown in fig. 3 and 4 and described below) before reaching the first light guiding region 135a (i.e. the light emitted by the second light emitting element 134 does not cause the first pattern P1 of the cover 136 to emit light), so that the light emitted by the first light emitting element 133 and the light emitted by the second light emitting element 134 can be more ensured not to interfere with each other.
In practical applications, the light emitting element can be flexibly disposed on the wall surface of the hollow portion 132a or the wall surface of the light blocking portion 132b, and is not limited to the embodiment shown in fig. 2 and 3.
As shown in fig. 3 and 4, in the present embodiment, the light guide plate 135 has a connection portion 135c. Both ends of the connection portion 135c are respectively connected to the first light guiding region 135a and the second light guiding region 135b. Compared to the scattered light guide blocks, the present embodiment can facilitate the assembly and alignment of the light guide plate 135 by connecting the first light guide region 135a and the second light guide region 135b via the connecting portion 135c. Specifically, the connecting portion 135c has a bent portion 135c1. Thereby, the difficulty of the interference between the light emitted by the first light emitting element 133 and the light emitted by the second light emitting element 134 can be further increased.
As shown in fig. 3 and 4, in the present embodiment, the connection portion 135c with the bending portion 135c1 is U-shaped, but the disclosure is not limited thereto.
Referring to fig. 5, a partial enlarged view of a light shielding sheet 232 and a light guiding plate 235 according to another embodiment of the disclosure is shown. As shown in fig. 5, in the present embodiment, the light shielding sheet 232 has a hollowed-out portion 232a. The hollowed-out portion 232a has a closed contour. The light guide plate 235 is embedded in the hollow portion 232a. The light guide plate 235 includes a first light guide region 135a, a second light guide region 135b and a connection portion 235c, wherein the first light guide region 135a and the second light guide region 135b are identical or similar to the embodiment shown in fig. 3, and thus, reference is made to the above related description, and thus, the description thereof will be omitted herein. The difference between the present embodiment and the embodiment shown in fig. 3 is that the connection portion 235c of the present embodiment has a V shape, so that the difficulty of interfering the light emitted from the first light emitting element 133 and the second light emitting element 134 can be increased.
In practical applications, the connection portion 135c may be arranged between the first light guiding region 135a and the second light guiding region 135b and have a zigzag shape (e.g. a zigzag shape), which is not drawn herein.
As shown in fig. 3, in the present embodiment, the width of the connecting portion 135c is smaller than the width of the first light guiding region 135a and the width of the second light guiding region 135b (e.g. the width in the up-down direction in fig. 3), but the disclosure is not limited thereto.
Referring to fig. 6, a front view of a light shielding sheet 332 and a light guiding plate 335 according to another embodiment of the disclosure is shown. As shown in fig. 6, in the present embodiment, the light shielding sheet 332 has a hollowed-out portion 332a. The hollowed-out portion 332a has a closed contour. The light guide plate 335 is embedded in the hollow portion 332a. The light guide plate 335 includes a first light guide region 135a, a second light guide region 135b and a connection portion 335c, wherein the first light guide region 135a and the second light guide region 135b are the same or similar to the embodiment shown in fig. 3, and thus the description thereof is omitted herein for brevity. The difference between the present embodiment and the embodiment shown in fig. 3 is that the width of the connection portion 335c of the present embodiment is larger than the width of the first light guiding region 135a and the width of the second light guiding region 135b (for example, the width in the up-down direction in fig. 6).
In practical applications, the width of the connecting portion 135c may also be equal to the width of the first light guiding region 135a and the width of the second light guiding region 135b, which are not drawn herein.
As is apparent from the above description of the embodiments of the present disclosure, in the backlight assembly of the present disclosure, the first light emitting element and the second light emitting element emit light toward the first light guiding region and the second light guiding region of the light guiding plate, respectively. And the light guide plate is embedded in the hollowed-out part of the light shielding sheet, and the light isolation part of the light shielding sheet is arranged between the first light guide area and the second light guide area. Therefore, the light isolation part of the light shielding sheet can isolate the light emitted by the first light emitting element and the light emitted by the second light emitting element without mutual interference, so that the first graph and the second graph on the cover plate can be independently displayed. In some embodiments, at least one of the first light emitting element and the second light emitting element is disposed on a wall surface of the hollow portion and configured to emit light toward the light-blocking portion, or disposed on a wall surface of the light-blocking portion and configured to emit light away from the light-blocking portion. In some embodiments, the light guide plate has a connecting portion with two ends respectively connected to the first light guide region and the second light guide region, and the connecting portion has a bending portion. Therefore, the light emitted by the first light-emitting element can reach the second light guide area after more than two turns, or the light emitted by the second light-emitting element can reach the first light guide area after more than two turns, so that the light emitted by the first light-emitting element and the light emitted by the second light-emitting element can be more ensured not to interfere with each other. In addition, compared with the scattered light guide blocks, the first light guide area and the second light guide area are connected through the connecting part in the embodiment, so that the assembly and the alignment of the light guide plate can be facilitated.
While the present disclosure has been described with reference to the exemplary embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the disclosure, and it is therefore intended that the scope of the disclosure be limited only by the scope of the appended claims.
Claims (10)
1. A backlight assembly, comprising:
the reflecting sheet is arranged on a circuit board and is provided with a first through hole and a second through hole;
the shading sheet is arranged on the reflecting sheet and is provided with a hollowed-out part, and the hollowed-out part is provided with a closed contour;
the first light-emitting element and the second light-emitting element are arranged on the circuit board, respectively accommodated in the first through hole and the second through hole and positioned in the hollowed-out part; and
the light guide plate is embedded in the hollowed-out part and comprises:
the first light guide area is provided with a first light equalizing area and a first light emitting area, and the first light emitting element and the first light emitting area are positioned on two opposite sides of the first light equalizing area; and
a second light guiding region having a second light equalizing region and a second light emitting region, wherein the second light emitting device and the second light emitting region are located at two opposite sides of the second light equalizing region,
the light shielding sheet is further provided with a light shielding part arranged between the first light guiding area and the second light guiding area.
2. The backlight assembly of claim 1, wherein the first light-emitting region and the second light-emitting region respectively have a first light-guiding pattern and a second light-guiding pattern formed by a plurality of microstructures.
3. The backlight assembly of claim 2, further comprising a cover plate disposed over the light guide plate and the light shielding plate, wherein a reflective layer is disposed on a side of the cover plate facing the light guide plate, and the cover plate further has a first pattern and a second pattern that are transparent to light and vertically correspond to the first light guide pattern and the second light guide pattern, respectively.
4. The backlight assembly of claim 1, wherein the thickness of the light shielding sheet is greater than the thickness of the light guide plate, the height of the first light emitting element and the height of the second light emitting element.
5. The backlight assembly of claim 1, wherein at least one of the first light emitting element and the second light emitting element is disposed on a wall surface of the hollow portion and configured to emit light toward the light blocking portion.
6. The backlight assembly of claim 1, wherein at least one of the first light emitting element and the second light emitting element is disposed on a wall surface of the light blocking portion and configured to emit light away from the light blocking portion.
7. The backlight assembly of claim 1, wherein the light guide plate has a connection portion, and two ends of the connection portion are respectively connected to the first light guide region and the second light guide region.
8. The backlight assembly of claim 7, wherein the connection portion has a bent portion.
9. The backlight assembly of claim 1, wherein the light-emitting surface of the first light-emitting element has a first width, the first light-homogenizing region is a portion within a first distance from the light-incident surface of the first light-guiding region, and the first distance is at least about 1.5 times the first width.
10. The backlight assembly of claim 9, wherein the light-emitting surface of the second light-emitting device has a second width, the second light-homogenizing region is a portion within a second distance from the light-incident surface of the second light-guiding region, and the second distance is at least about 1.5 times the second width.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW111122506 | 2022-06-16 | ||
| TW111122506 | 2022-06-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117289813A true CN117289813A (en) | 2023-12-26 |
Family
ID=89132003
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210774868.1A Pending CN117289813A (en) | 2022-06-16 | 2022-07-01 | Backlight assembly |
| CN202310705470.7A Pending CN117251076A (en) | 2022-06-16 | 2023-06-14 | Luminous touch control module |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310705470.7A Pending CN117251076A (en) | 2022-06-16 | 2023-06-14 | Luminous touch control module |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN117289813A (en) |
| TW (1) | TW202401471A (en) |
-
2022
- 2022-07-01 CN CN202210774868.1A patent/CN117289813A/en active Pending
-
2023
- 2023-06-12 TW TW112121888A patent/TW202401471A/en unknown
- 2023-06-14 CN CN202310705470.7A patent/CN117251076A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN117251076A (en) | 2023-12-19 |
| TW202401471A (en) | 2024-01-01 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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