TWI537647B - Backlight module and supporting element - Google Patents

Description

Backlight module and support component

The invention relates to a backlight module and a supporting component, in particular to a backlight module and a supporting component provided with a supporting frame.

Among the many display technologies available today, display panels are classified into self-illuminating and non-self-illuminating types. The non-self-luminous display panel includes, for example, a liquid crystal display panel and an electrowetting display panel. When the ambient light is dim, it is more difficult for the user to view the content displayed by the non-self-illuminating display panel. Therefore, this type of display panel usually also has a backlight module on the back of the display panel to provide the light required by the user to view the display panel.

In order not to affect the display content of the display panel, the light provided by the backlight module is preferably uniform. Therefore, the display manufacturers are all demanding to provide a backlight module capable of emitting uniform light. However, in a direct type backlight module in which the light source is directly under the diffusion plate, the diffusion plate is often suspended from the light source. However, when the size of the display panel is getting larger and larger, the diffusion plate is easily bent and deformed due to the influence of gravity and other external forces. Once the diffuser is deformed and scratched, the light will travel unevenly after the deformed diffuser. Therefore, the diffusion plate of the backlight module is not easily deformed to provide uniform light, which is a problem faced by the industry today.

In view of the above problems, the present invention provides a backlight module and a supporting component, and the diffusion plate of the backlight module is supported by the support frame to provide uniform light.

The invention provides a backlight module, which comprises a base, a support frame, a casing, a light source and a diffusion plate. The support frame has one of the connecting ends and one end on the opposite sides. The connection end is disposed on the base. The support frame has at least one recess. The distance between the recess and the connecting end is less than or equal to twice the distance between the recess and the end. The housing has a bottom and a side wall. The base is placed at the bottom. The side walls surround the support frame. The side wall has a support table. The distance between the support table and the base is greater than or equal to the distance between the end and the base. The light source is disposed on the housing, and the sidewall surrounds the light source. The diffusion plate is disposed on the support table.

The invention also provides a support element comprising a base and a support frame. The support frame has one of the connecting ends and one end on the opposite sides. The connection end is disposed on the base. The support frame has at least one recess. The distance between the recess and the connecting end is less than or equal to twice the distance between the recess and the end.

According to the backlight module and the supporting member of the present invention, the diffusion plate can be prevented from being bent and deformed by the support of the support frame even if it is affected by gravity or other external force by the support table and the support frame. Further, it is possible to avoid the problem of uneven light due to the bending deformation of the diffusion plate. In addition, when the backlight module is subjected to vibration, the support frame can also be swayed by the diffusion plate by the concave portion thereof, thereby avoiding the scratch of the diffusion plate due to the relative displacement between the support frame and the diffusion plate. Thereby, the backlight module and the supporting member of the present invention can avoid the problem of uneven light due to the scratch of the diffusion plate.

The above description of the present invention and the following description of the embodiments of the present invention are intended to illustrate and explain the spirit and principles of the invention.

The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art. The following examples are intended to describe the present invention in further detail, but are not intended to limit the scope of the invention.

Please refer to FIG. 1 , which is a side cross-sectional view of a backlight module 10 according to an embodiment of the invention. The backlight module 10 includes a plurality of supporting components 110, a casing 120, a light source 130, a diffusing plate 140, an optical film 150, and an outer frame 160. The support member 110 includes a base 111, a support frame 112, two lamp tube holders 114, and a plurality of fixing members 115. The support frame 112 has one of the connecting ends 112a and one end 112b on opposite sides. The connection end 112a is disposed on the base 111. The support frame 112 has at least one recess 113. The distance D1 between the recess 113 and the connecting end 112a is less than or equal to twice the distance D2 between the recess 113 and the end 112b. The housing 120 includes a backing plate 120a and a reflective element 120b. The bottom portion 121 of the back plate 120a and the bottom portion 121' of the reflective member 120b are formed as the bottom of the casing 120. The side wall 122 of the backing plate 120a and the side wall 122' of the reflective element 120b are formed as side walls of the housing 120. The side wall 122 of the back plate 120a and the side wall 122' of the reflective member 120b each have a support base 123' and a support base 123', and are formed as a support base of the housing 120. Since the support table 123' is located on the support table 123', the support surface 123a of the support table of the housing 120 is located on the surface of the support table 123'.

The susceptor 111 is provided to the bottom portions 121, 121' via the fixing member 115. Fixing member 115 It can be engaged with the bottom portions 121, 121'. The side walls 122, 122' surround the support frame 112 and the light source 130. The bottom portion 121' of the partially reflective element 120b is located between the base 111 and the bottom 121 of the backing plate 120a. The distance between the support surface 123a of the support table formed by the support tables 123', 123' and the base 111 is greater than the distance between the end 112b and the base 111. When the light source 130 is a light pipe, the light source 130 is disposed in the casing 120 via the susceptor 111 and the accommodating portion of the lamp accommodating frame 114. The diffusion plate 140 is disposed on the support surface 123a of the support table 123'. The optical film 150 is disposed on the diffusion plate 140. The outer frame 160 is disposed around the housing 120, and a portion thereof is located around the optical film 150.

In the present embodiment, the number of the supporting members 110 can be two, but is not limited thereto. In other embodiments, the number of support members 110 can be single or multiple depending on design requirements. In this embodiment, the base 111 and the support frame 112 are integral and inseparable. In this embodiment, the number of the lamp housings 114 of each of the support members 110 can be two, but is not limited thereto. In other embodiments, the number of the lamp holders 114 of the support member 110 can also be single or multiple according to design requirements. When the light source 130 is not a lamp but a light-emitting diode or other light-emitting device, the lamp holder can be omitted.

In the present embodiment, the recess 113 can be a recess 113 that smoothes the surface of the support frame 112. The distance D1 between the center position of the recess 113 and the connecting end 112a is less than or equal to twice the distance D2 between the center position of the recess 113 and the end 112b. In some embodiments, the distance between the upper edge of the recess 113 and the connecting end 112a may be less than or equal to twice the distance D2 between the upper edge of the recess 113 and the end 112b. In some embodiments, the distance between the lower edge of the recess 113 and the connecting end 112a can be less than or equal to the concave. The lower edge of the portion 113 is twice the distance D2 from the end 112b. In some embodiments, the distance between the lower edge of the recess 113 and the connecting end 112a can be less than twice the distance D2 between the upper edge of the recess 113 and the end 112b. Alternatively, in some embodiments, the distance between the upper edge of the recess 113 and the connecting end 112a may be less than twice the distance D2 between the lower edge of the recess 113 and the end 112b.

The diffusion plate 140 is disposed on the support surface 123a and supported by the support surface 123a and the support frame 112. Therefore, even if the diffusion plate 140 provided on the support surface 123a is affected by gravity or other external force, the deformation of the support frame 112 may be slowed down by the support of the support frame 112. In the present embodiment, the support table 123' of the side wall 122 and the support table 123' of the side wall 122' are formed as a support base of the housing 120. In other embodiments, the side wall 122' of the reflective element 120b can also have no support table. Therefore, the support surface 123a of the support table of the housing 120 can be the surface of the support table 123' of the side wall 122 of the back panel. In other embodiments, only the backing plate 120a having the reflective function can be provided as the housing 120, such as a polished stainless steel plate, to save component count and cost.

In the present embodiment, the distance between the support surface 123a and the base 111 is greater than the distance between the end 112b and the base 111. Therefore, there is a gap between the end 112b and the diffusion plate 140. In other embodiments, the distance between the support surface 123a and the base 111 can also be substantially equal to the distance between the end 112b and the base 111. Therefore, there is substantially no space between the end 112b and the diffusion plate 140, so that the support frame 112 can directly support the diffusion plate 140 without deforming the diffusion plate 140 in the pitch range.

In the present embodiment, the support frame 112 is a tapered body having a recess 113. The horizontal cross-sectional area of the support frame 112 gradually increases from top to bottom. However, the recess 113 is annular Around the support frame 112, the horizontal cross-sectional area of the support frame 112 is first narrowed and enlarged when passing through the concave portion 113.

When the backlight module 10 is subjected to vibration, the diffusion plate 140 may be shaken or shaken by vibration. If the support frame 112 and the diffusion plate 140 are not easily displaced relative to each other, the possibility that the diffusion plate 140 is scratched is reduced. That is, if the support frame 112 and the diffusion plate 140 are in contact with each other, the support frame 112 swings with the shaking of the diffusion plate, and the diffusion plate 140 is less likely to be scraped by the support frame 112 when there is a corresponding swing between the two. Scratch. If the diffusion plate 140 is scratched, the backlight module 10 is provided with uneven light, thereby interfering with the display effect of the display using the backlight module 10. In the present embodiment, the recess 113 enables the support frame 112 to swing more easily, and the diffusion plate 140 is less likely to cause scratches.

Referring to FIG. 2A, a top view of the backlight module 10 in which the diffusion plate 140, the optical film 150, and the outer frame 160 are removed in FIG. 1A is shown. FIG. 2A shows an example of the arrangement of the support member 110 and the light source 130. In this example, the backlight module 10 (including the diffusion plate 140, the optical film 150, and the outer frame 160) is subjected to vibration tests in three directions of X, Y, and Z. In this test, the 1.75 gravitation root mean square value Grms (Gravity root mean square) is input for each direction, and the frequency is 10 to 300 Hz. The test is a variable frequency, and the frequency is continuously changed from low frequency to high frequency or high frequency to low frequency. Multiple cycles of testing, each direction lasts for 30 minutes.

Please refer to FIGS. 2B to 2E for the test results of different support members according to the configuration of FIG. 2A. The support frame in Figures 2B and 2C has a tapered shape and does not have a recess. In the test of Figure 2B, the distance between the end of the support frame and the base The distance of the support frame is 23.05 mm. The distance between the support surface of the support table and the base is 1 mm, so that the distance between the diffusion plate and the end of the support frame is 1 mm. The support frame is made of polycarbonate (PC) material. The O symbol in Fig. 2B is the position where the support frame is located, and the X symbol is the position where the diffusion plate is scratched after the test. After the test, five of the eight support frames caused scratches on the diffuser. In the test of Figure 2C, the distance between the end of the support frame and the base, that is, the length of the support frame is 22.92 mm. The distance between the support surface of the support table and the base is the same, so that the diffusion plate and the end of the support frame have substantially no spacing. The support frame is made of Acrylonitrile Butadiene Styrene (ABS) material. The O symbol in Fig. 2C is the position where the support frame is located, and the X symbol is the position where the diffusion plate is scratched after the test. After the test, six of the eight support frames caused scratches on the diffuser.

The support frame in Figures 2D and 2E is similar to the structure shown in Figure 1. The support frame is a cone having a recess. In the test of Fig. 2D, the distance between the end of the support frame and the base, that is, the length of the support frame was 22.98 mm. The distance between the support surface of the support table and the base is 1 mm, so that the distance between the diffusion plate and the end of the support frame is 1 mm. The support frame is made of ABS material. The O symbol in Fig. 2D is the position where the support frame is located. After the test, no support frame in the eight support frames caused scratches on the diffuser plate. In the test of Fig. 2E, the distance between the end of the support frame and the base, that is, the length of the support frame was 23.96 mm. The distance between the support surface of the support table and the base is the same, so that the diffusion plate and the end of the support frame have substantially no spacing. The support frame is made of ABS material. The O symbol in Figure 2E is the position where the support frame is located, and the X symbol is the diffusion plate in the test. The position where the scratch is produced. After the test, only three of the eight support frames caused scratches on the diffuser.

Compared with ABS materials, ABS materials have a larger Young's modulus. That is, in the same shape, the ABS material is harder and less swaying than the PC. Comparing Fig. 2B and Fig. 2D, in the case where the distance between the diffuser plate and the end of the support frame is the same, even if the support frame in Fig. 2B uses a soft PC material, the support frame without the recess is still diffused. The board caused scratches. In contrast, in the 2D figure, even if a hard ABS material is used, the support frame having the recess does not cause scratches on the diffusion plate.

Comparing FIGS. 2C and 2E, in the case where the diffusion plate and the end of the support frame are substantially free from each other, the support frame having no recess in FIG. 2C causes the most scattering of the diffusion plate. In contrast to Figure 2E, the support frame with the recesses causes only three scratches on the diffuser.

Even comparing 2B and 2E, the support frame in Fig. 2B is not only separated from the diffuser by a distance of 1 mm, but also uses a soft PC material. The support without the recess still causes five scratches on the diffuser. The support frame in Fig. 2E is not only substantially non-spaced from the diffuser plate, but also uses a harder ABS material, resulting in fewer scratches than the support frame in Fig. 2B. Therefore, it can be seen that the support frame of the support member in the backlight module is provided with a concave portion, which can effectively reduce the occurrence of scratches on the diffusion plate by the support frame.

In other embodiments, depending on the vibration situation, the recess can have a variety of designs that make the support frame susceptible to sloshing with the diffuser. Please refer to Figures 3, 4A and 5A. Side views of support members 310, 410, and 510 of other embodiments are shown. As shown in Fig. 3, in the support member 310, the support frame 312 has two concave portions 313 which are stacked one above another. As shown in FIG. 4A and its elevational cross-sectional view, FIG. 4B, in the support member 410, the support frame 412 has two recesses 413 which are disposed in the positive Y direction and the negative Y direction, respectively. The recess 413 is symmetrical with respect to the line L of the connection end 412a and the end 412b. Therefore, the support frame 412 can be easily shaken in the Y direction. As shown in FIG. 5A and its elevational cross-sectional view, FIG. 5B, in the support member 510, the support frame 512 has four recesses arranged around the positive X direction, the negative X direction, the positive Y direction, and the negative Y direction. 513. The recess 513 is symmetrical to the line L of the connection end 512a and the end 512b. Therefore, the support frame 512 can be easily shaken in the X and Y directions.

In summary, the backlight module and the supporting component of the present invention can prevent the diffusing plate from being bent and deformed by the support of the support frame even if it is affected by gravity or other external force by the support table and the support frame. situation. The present invention can thereby avoid the problem of unevenness of light caused by the bending deformation of the diffusion plate. In addition, when the backlight module is subjected to vibration, the support frame can also be shaken by the diffusion plate by the concave portion thereof to avoid the scratch of the diffusion plate due to the relative displacement between the support frame and the diffusion plate. Thereby, the present invention can avoid the problem of uneven light due to scratches on the diffusion plate.

Although the present invention has been disclosed above in the foregoing embodiments, it is not intended to limit the invention. It is within the scope of the invention to be modified and modified without departing from the spirit and scope of the invention. Please refer to the attached patent application for the scope of protection defined by the present invention.

10‧‧‧Backlight module

110, 310, 410, 510‧‧‧ support components

111‧‧‧Base

112, 312, 412, 512‧‧‧ support frame

112a, 412a, 512a‧‧‧ connectors

End of 112b, 412b, 512b‧‧‧

113, 313, 413, 513 ‧ ‧ recess

114‧‧‧Light tube holder

115‧‧‧Fixed parts

120‧‧‧shell

120a‧‧‧ Backplane

120b‧‧‧reflecting elements

121, 121’‧‧‧ bottom

122, 122’‧‧‧ side wall

123, 123’‧‧‧ support table

123a‧‧‧Support surface

130‧‧‧Light source

140‧‧‧Diffuser

150‧‧‧Optical diaphragm

160‧‧‧Front frame

D1, D2‧‧‧ distance

L‧‧‧ connection

O, X‧‧ symbol

1 is a side cross-sectional view of a backlight module in accordance with an embodiment of the present invention.

FIG. 2A is a plan view showing the backlight module in which the diffusing plate, the optical film, and the outer frame are removed in FIG. 1A.

2B to 2E are diagrams showing test results of different support members in accordance with the configuration of FIG. 2A.

Figure 3 is a side elevational view of the support member of the other embodiment.

Figure 4A is a side elevational view of the support member of the other embodiment.

Fig. 4B is a cross-sectional view taken along line 4B-4B of Fig. 4A.

Figure 5A is a side elevational view of the support member of the other embodiment.

Fig. 5B is a cross-sectional view taken along line 5B-5B of Fig. 5A.

10‧‧‧Backlight module

110‧‧‧Support components

111‧‧‧Base

112‧‧‧Support frame

112a‧‧‧Connected end

End of 112b‧‧‧

113‧‧‧ recess

114‧‧‧Light tube holder

115‧‧‧Fixed parts

120‧‧‧shell

120a‧‧‧ Backplane

120b‧‧‧reflecting elements

121, 121’‧‧‧ bottom

122, 122’‧‧‧ side wall

123, 123’‧‧‧ support table

123a‧‧‧Support surface

130‧‧‧Light source

140‧‧‧Diffuser

150‧‧‧Optical diaphragm

160‧‧‧Front frame

D1, D2‧‧‧ distance

Claims (12)

A backlight module includes: a base; a support frame having a connecting end and an end on opposite sides, the connecting end is disposed on the base, the support frame is a cone, and has the same At least one recess of the surface of the support frame, the recess having a distance from the connecting end that is less than or equal to twice the distance between the recess and the end; a housing having a bottom and a side wall, the base being disposed on the a bottom wall, the side wall surrounds the support frame, the side wall has a support table, the support table and the base are at a distance greater than or equal to the distance between the end and the base; a light source is disposed on the housing, and the side wall is surrounded by The light source; and a diffusion plate disposed on the support table. The backlight module of claim 1, wherein the recess surrounds the support frame. The backlight module of claim 1, wherein the recesses surround the support frame and are symmetric with respect to a connection between the connection end and the end. The backlight module of claim 1, wherein the base is integral with the support frame and is inseparable. The backlight module of claim 1, wherein the light source is disposed in the housing via the base. The backlight module of claim 5, wherein the base is provided with a lamp housing, the light source is a lamp, and the light source is disposed in the housing via the lamp holder of the base. The backlight module of claim 1, wherein the light source is a light emitting diode. A support member includes: a base; and a support frame having a connecting end and an end on opposite sides, the connecting end is disposed on the base, the support frame is a cone, and has the The at least one recess of the surface of the support frame is smooth, and the distance between the recess and the connecting end is less than or equal to twice the distance between the recess and the end. The support member of claim 8, wherein the recess surrounds the support frame. The support member of claim 8, wherein the recesses surround the support frame and are symmetric with respect to the connection between the connection end and the end. The support member of claim 8, wherein the base is integral with the support frame and is inseparable. The support member of claim 8, wherein the base is provided with a lamp housing for receiving a lamp.