TWM514010U - Lighting module - Google Patents

Abstract

A lighting module includes a light guide plate, a light bar, and a buffer. The light bar is arranged at a light -incident surface of the light guide plate and includes a carrier board and a plurality of luminous components, wherein the luminous components are mounted on the carrier board and a light-emitting surface of each of the luminous components faces the light-incident surface. The buffer includes a connecting surface and a pressed surface, the connecting surface is in contact with the carrier board, and the pressed surface faces the light-incident surface. When specific condition is satisfied, the buffer cannot shield the light transmitted from the luminous components to the light guide plate and can provide sufficient capacity to prevent the optical quality of the light guide plate from affecting when the luminous components are lit and the distance between the light-incident surface and the luminous components is changed.

Description

Light source module

The present invention relates to a side-input light source module having a buffer member to prevent direct contact between the light guide plate and the light-emitting element to destroy optical quality.

The backlight module is an important component of the liquid crystal display, and the side-in backlight module is mounted on the side of the light guide plate by the light-emitting diode, and the light-emitting diode is formed by an optical pattern formed on the light guide plate. The point source can be converted into a surface source with sufficient brightness and uniform intensity distribution.

In general, when the light-emitting diode is lit, in addition to providing the light energy required by the backlight module, a large amount of heat energy is generated at the same time, which causes the light guide plate to be easily expanded by the heat energy in the vicinity of the light-emitting diode. During the expansion process of the light guide plate, the light incident surface of the light guide plate changes due to the distance from the light emitting diode, and the optical quality is deteriorated, for example, a hot spot, or even a light incident surface due to heat generation. When the diode is too close and the yellowing is damaged, the optical quality of the light guide plate is reduced.

The present invention provides a light source module, which is a side-input light source module. The light bar of the light source module is provided with a buffering member for preventing the light incident surface of the light guide plate from deteriorating due to the proximity of the light emitting element after the light guide plate is heated and expanded. In addition, the cushioning member of the present invention is designed to not shield the light emitted by the light-emitting element.

According to the present invention, a light source module includes a light guide plate, a light bar, and a buffer member. The light guide plate has a light incident surface. The light bar is disposed on the light incident surface and includes a carrier plate and a light emitting element. The light emitting element is fixed on the carrier along the extending direction of the light incident surface, and the light emitting surface of the light emitting element faces the light incident surface. The cushioning member includes a connecting surface and a pressure receiving surface which are oppositely disposed, the connecting surface is disposed on the carrier plate, and the pressure receiving surface faces the light incident surface. The height of the light-emitting element is h, and the length of the connecting surface in the extending direction of the light-incident surface is D. When the light-emitting element is lit, the light guide plate is thermally expanded to press the buffer member, so that the pressure receiving surface of the buffer member is on the light-incident surface. The length of the extending direction of the light guide plate is d, and the pressure of the buffer member is H, which satisfies the following conditions: h < H; and 0 < d < D.

In one embodiment of the present invention, when the light exiting angle of the light emitting element is α, the interval between the adjacent two light emitting elements is P1, and when the light emitting element is not lit, the distance from the light exiting surface to the light incident surface is L. When the following conditions are satisfied, the buffer member is made of a material having a black light absorbing ability, thereby eliminating a bright band formed in an excessive region of the light guide plate, tan(α/2) < P1/2L.

In another embodiment of the present invention, when the light exiting angle of the light emitting element is α, the interval between the adjacent two light emitting elements is P2, and when the light emitting element is not lit, the distance from the light emitting surface to the light incident surface is L. The buffer member is made of a material having a reflective property when the following conditions are satisfied, thereby eliminating the dark band formed in the transition region of the light guide plate, tan(α/2) ≧ P2/2L.

In addition, the light source module of the present invention may further comprise an adhesive member disposed between the carrier plate and the buffer member for connecting the buffer member and the carrier plate to each other.

Moreover, the side cross section of the cushioning member may be hemispherical or quadrangular; when the side cross section of the cushioning member is hemispherical, the connecting surface is connected to the pressure receiving surface; when the side cross section of the cushioning member is quadrangular, the connecting surface of the cushioning member and The pressure receiving surfaces further include sides for connecting the pressure receiving surface and the connecting surface.

1 and FIG. 2, FIG. 1 is a top view of a light source module according to a first embodiment of the present invention, and FIG. 2 is a partially enlarged view of the light source module according to the first embodiment of the present invention. The light source module 10 includes a light guide plate 100, a light bar 110, and a buffer member 120. The light guide plate 100 has a flat shape and is transparent to light, and is usually made of acrylic (PMMA) or plastic (PC), but does not exclude other equal substances, such as acrylic resin (Acrylic Resin), cycloolefin polymer (COC). At least one material selected from the group consisting of polymethyl methacrylate (PMMA), polycarbonate (PC), polyetherimide, fluorocarbon polymer, or silicone (Silicone) Or other alternative materials. The light guide plate 100 has a light incident surface 102, an effective light exit area A1 and a transition area A2, and the transition area A2 is between the light incident surface 102 and the effective light exit area A1. The effective light exit area A1 is provided for the light source module 10 to provide uniformity. In the region of the light of the brightness, the transition zone A2 has a bright band and a dark band distribution in which the light intensity is strongly contrasted due to the proximity of the light bar 110.

The light bar 110 includes a carrier 112 and a light emitting element 114. Carrier board 112 can be, for example, a printed circuit board. The light-emitting element 114 is used to provide a point light source, and can be realized, for example, by a light-emitting diode. Each of the light-emitting elements 114 has a light exit surface 1140 and an exit angle α, wherein the light exit angle α of the light-emitting element 114 is defined by its 50% light intensity envelope. The light-emitting elements 114 are fixed to the carrier 112 at equal intervals along the extending direction of the light-incident surface 102 (ie, the direction D1), and the adjacent two light-emitting elements 114 have a first pitch P1 in the direction D1.

The carrier 112 is disposed on the light incident surface 102 side, and the light emitting surface 1140 of the light emitting element 114 faces the light incident surface 102 of the light guide plate 100. The light-emitting element 114 has a component height h, which is defined as the vertical distance between the light-emitting surface 1140 and the bottom surface 1142 of the light-emitting element 114 in a direction perpendicular to the light-incident surface 102, which is close to the carrier 112.

Referring to FIG. 3, a perspective view of a cushioning member according to a first embodiment of the present invention is illustrated. The cushioning member 120 can be made of, for example, a material such as foam, rubber, or the like that has the ability to deform without applying compressive stress without breaking. It should be particularly noted that the cushioning member 120 may also be an elastomer made of a thermosetting or thermoplastic polymer material, but the thermoplastic polymer material must have a thermal deformation temperature higher than the operating temperature of the light-emitting element 114.

As shown in FIG. 3, the cushioning member 120 is a hemisphere having an oppositely disposed connecting surface 122 and a pressure receiving surface 124; wherein the connecting surface 122 is a circular plane, and the pressure receiving surface 124 is a curved surface. Referring to FIG. 1 and FIG. 2 , the buffer member 120 is fixed on the carrier 112 and located between the adjacent two light-emitting elements 114 . The first pitch P1 between the adjacent two light-emitting elements 114 is greater than the length D of the connecting surface 122 in the direction D1, so that the connecting surface 122 of the buffer member 120 is flat on the carrier 112. The pressure receiving surface 124 of the buffer member 120 faces the light incident surface 102 of the light guide plate 100.

As shown in FIG. 1 , the light source module 10 can include, for example, one or more buffer members 120 . When the light source module 10 includes only a single buffer member 120 , the buffer member 120 can be arranged on the central axis C of the light guide plate 100 . on. When the light source module 10 includes a plurality of buffering members 120, the buffering members 120 may be arranged on opposite sides of the central axis C of the light guiding plate 100, and the central axis C is the light incident surface 102 of the vertical light guiding plate 100 and will guide The light panel 100 is divided into the axes of the left and right halves. In addition, the number of the buffer members 120 may be proportional to the length of the light guide plate 100 in the direction D1, that is, the longer the length of the light guide plate 100 in the direction D1, the more the number of the buffer members 120; thereby the light guide plate 100 The opposite sides of the central axis C provide equal buffering capacity.

Between the buffer member 120 and the carrier 112, an adhesive member 130 may be further provided for connecting the buffer member 120 and the carrier plate 112 to each other. The heat-resisting temperature of the adhesive member 130 must be higher than the operating temperature of the light-emitting element 114, so as to avoid the adhesive member 120 that is fixedly connected to the carrier plate 112 by the adhesive member 130, and the adhesive member 130 loses the adhesive property under the normal operation of the light source module 10. The effect of protecting the light guide plate 100 cannot be achieved by falling off.

Refer to Figure 1 and Figure 2. The light source module 10 shown in FIG. 1 is in a state in which the light-emitting element 114 is not yet illuminated. The light source module 10 illustrated in FIG. 2 has been illuminated for a period of time, and the light guide plate 100 is subjected to the light-emitting element 114. The state when the thermal energy generated during lighting is expanded. In FIG. 1 , a first distance L1 is formed between the carrier 112 and the light incident surface 102 of the light guide plate 100 , and the first distance L1 is not less than the uncompressed height H1 of the buffer 120 . In other words, in this state, the first distance L1 between the carrier 112 and the light incident surface 102 is at least equal to the uncompressed height H1 of the buffer member 120. Thereby, the buffer member 120 can have sufficient buffer space for the expanded light guide plate 100 to be compressed after the light guide plate 100 is thermally expanded, and at the same time, the buffer member 120 is prevented from losing elastic force due to being pressed by the light guide plate 100 for a long time. It should be particularly noted that when the pressure receiving surface 124 is curved, the uncompressed height H1 of the cushioning member 120 is perpendicular to the light incident surface 102, and is tangent to the pressure receiving surface 124 from the connecting surface 122. The vertical distance between the hemispherical cushion members 120 shown in Fig. 1 is the radius of the hemisphere.

As shown in FIG. 2, the light guide plate 100 is elongated by thermal expansion to press the cushion member 120 to deform the cushion member 120. At this time, the cushioning member 120 has a pressure receiving height H2. The pressure height H2 is less than the uncompressed height H1, and the pressure height H2 is not less than the component height h of the light-emitting element 114, so as to prevent the light-incident surface 102 of the light guide plate 100 from directly contacting the light-emitting element 104 or less than a safe distance. Further, the effect of protecting the light guide plate 100 is achieved. More specifically, after the light-emitting element 114 is turned on, the heat generated by the light-emitting element 114 causes the light-guiding plate 100 to have a side of the light-incident surface 102 that is gradually expanded by heat to press the buffer member 120 until the length of the light guide plate 100 is no longer When the temperature is deformed, it means that the light source module 10 is in a state of thermal equilibrium. In the thermal equilibrium state, the length of the pressure receiving surface 124 of the buffer member 120 in contact with the light incident surface 102 of the light guide plate 100 in the extending direction of the light incident surface 102 is d, and the length of the connecting surface 122 of the buffer member 120 is D, which satisfies The following conditions are true: 0 < d < D.

When the foregoing conditions are satisfied, the buffering member 120 can provide a buffering effect to avoid a bright spot caused by the light incident surface 102 of the light guide plate 100 being too close to the light-emitting element 104 when heated, and the light-incident surface of the light-incident surface 102 due to heat generation When the 104 is too close and the yellowing is damaged to cause the optical quality of the light guide plate 100 to emit light, the buffer member 120 can be prevented from blocking the light having the light exit angle α emitted from the light emitting element 104 from being transmitted to the light guide plate 100.

The cushioning member 120 may be designed to have a light absorbing ability in black or gray or the like. Thereby, it is possible to alleviate the problem that the light-emitting element 140 is densely arranged on the light-incident surface 102 and the bright-band A3 is formed in the transition region A2 because the light-emitting element α of the light-emitting element 104 is large or the light source module 10 is provided with a specific light intensity.

When the light guide plate 100 is not thermally expanded, if the light exit angle of the light emitting element 114 is α, the interval between the adjacent two light emitting elements 114 is P1, and the distance between the light exit surface 1140 of the light emitting element 114 and the light incident surface 102 is L, Then, when the following conditions are satisfied, a bright band is formed in the transition region A2 of the light guide plate 100: tan(α/2) < P1/2L.

More specifically, when the light-emitting angle α of the light-emitting element 140 is large or the light source module 10 provides a specific light intensity, the light-emitting elements 140 are densely arranged on the light-incident surface 102 (such as the light-emitting element 114 shown in FIGS. 1 and 2). When the light-incident surface 102 is arranged at the first pitch P1, the light-emitting angles α of the adjacent two light-emitting elements 104 overlap at the transition region 102, so that the light intensity at the intersection of the light-emitting angles α of the two light-emitting elements 104 is higher than that. The light-emitting angle α of the two light-emitting elements 104 does not overlap the light intensity, and a bright band A3 is formed. The buffer member 120 having a light absorbing capability designed to be black or gray or the like can absorb the light emitted from the portion of the light-emitting element 114 and reduce the intensity of light entering the light guide plate 100 to eliminate the bright band A3.

Please refer to FIG. 4 and FIG. 5 . FIG. 4 and FIG. 5 respectively illustrate top views of a light source module according to a second embodiment of the present invention. The light source module 10 includes a light guide plate 100, a light bar 110 and a buffer member 120. The light guide plate 100 has a flat shape and is transparent to light, and is usually made of acrylic or plastic. The light guide plate 100 has a light incident surface 102, an effective light exit area A1 and a transition area A2, a transition area A2 is located between the light incident surface 102 and the effective light exit area A1, and the effective light exit area A1 is an area for the light source module 10 to output uniform intensity light. .

The light bar 110 includes a carrier 112 and a light emitting element 114. Each of the light-emitting elements 114 has a light exit surface 1140 and an exit angle α, wherein the light exit angle α of the light-emitting element 114 is defined by its 50% light intensity envelope. The light-emitting elements 114 are fixed on the carrier 112 at equal intervals along the extending direction of the light-incident surface 102 (ie, the direction D1), and the adjacent two light-emitting elements 114 have a second pitch P2 in the direction D1; and are arranged at the second pitch P2. The light-emitting element 114 partially overlaps the light-emitting angle α of the adjacent two light-emitting elements 114 in the transition region A2, and the intersection point is located in the transition region A2, and forms the dark band A4 in the transition region A2.

The carrier 112 is disposed on the light incident surface 102 side, and the light emitting surface 1140 of the light emitting element 114 faces the light incident surface 102 of the light guide plate 100. The light-emitting element 114 has a component height h from the light exit surface 1140 to a vertical distance between the bottom surface 1142 of the carrier plate 112 in a direction perpendicular to the light-incident surface 102.

The cushioning member 120 can be made of, for example, a material such as foam, rubber, or the like that has a capability of applying compressive stress to deform without breaking. Please refer to FIG. 6 and FIG. 7 , which respectively illustrate the buffer member 120 corresponding to the embodiment. In FIG. 6, the cushioning member 120 is a four-sided column and has oppositely disposed planar planes 122 and a pressure receiving surface 124. In FIG. 7, the cushioning member 120 is a truncated cone and has opposite arrangements and It is a flat connecting surface 122 and a pressure receiving surface 124.

The buffer member 120 is fixed on the carrier 112 and located between the light-emitting elements 114, and the number of the buffer members 120 is correspondingly arranged on opposite sides of the central axis C of the light guide plate 100. The connecting surface 122 of the buffer member 120 is flatly attached to the carrier 112, and the pressure receiving surface 124 faces the light incident surface 102 of the light guide plate 100. Between the buffer member 120 and the carrier 112, an adhesive member 130 is further disposed. The adhesive member 130 is used for connecting the buffer member 120 and the carrier plate 112 to each other.

The light source module 10 illustrated in FIG. 5 is a thermal equilibrium state in which the light-emitting element 114 has been illuminated for a period of time, and the light guide plate 100 is expanded by receiving thermal energy generated when the light-emitting element 114 is turned on. The light guide plate 100 is elongated by thermal expansion to press the cushioning member 120, and the cushioning member 120 is deformed to have a pressure receiving height H2. The pressure height H2 is not less than the component height h of the light-emitting element 114, thereby achieving the effect of protecting the light guide plate 100. In this state, the length of the connecting surface 122 of the buffer member 120 is D, and the length of the pressure receiving surface 124 of the buffer member 120 in contact with the light incident surface 102 of the light guide plate 100 is d, which satisfies the following condition: 0 < d < D.

Referring to FIG. 4, when the light guide plate 100 is not thermally expanded, when the light exiting angle of the light emitting element 114 is α, the adjacent two light emitting elements 114 have a second pitch P2, and the light exiting surface 1140 of the light emitting element 114 enters. The distance of the smooth surface 102 is L, and when the following conditions are satisfied, the dark band A4 is formed in the transition region A2 of the light guide plate 100: tan(α/2) ≧ P2/2L.

In order to further overcome the problem that the light exit angle α of the adjacent two light-emitting elements 104 arranged at the second pitch P2 forms the dark strip A4 in the transition region A2 of the light guide plate 100, the buffer member 120 may be selected to have a light-reflecting capability such as white or silver. Thereby, the buffer member 120 can reflect part of the light generated by the light-emitting element 114 to the dark band A4, and the area of the dark band A4 can be reduced or even the dark band A4 can be generated.

Moreover, the buffer member 120 can be designed to have a rough connecting surface 122, a pressure receiving surface 124, and a side surface connected to the connecting surface 122 and the pressure receiving surface 124, thereby scattering the light projected thereon by changing the light angle. α prevents the generation of the dark band A4, so that the light source module 10 achieves a uniform light output effect.

Please refer to FIG. 8 , which is a top view of a light source module according to a third embodiment of the present invention. The light source module 10 includes a light guide plate 100, a light bar 110, and buffer members 120a and 120b. The light guide plate 100 has a flat shape and is transparent to light, and is usually made of acrylic or plastic. The light guide plate 100 has a light incident surface 102, an effective light exiting area A1 and a transition area A2, and the transition area A2 is located between the light incident surface 102 and the effective light exiting area A1.

The light bar 110 includes a carrier 112 and light emitting elements 114a, 114b. Each of the light-emitting elements 114a has a light-emitting surface 1140a and a light-emitting angle α1, and each of the light-emitting elements 114b has a light-emitting surface 1140b and an light-emitting angle α2, and the light-emitting angle α1 of the light-emitting element 114a is smaller than the light-emitting angle α2 of the light-emitting element 114b. The light exit angle α1 and the light exit angle α2 of the light-emitting element 114b are respectively defined by their 50% light intensity envelope.

The light-emitting elements 114a and 114b are respectively fixed on the carrier 112 along the extending direction of the light-incident surface 102 (ie, the direction D1), and the light-emitting elements 114b are located between the light-emitting elements 114a, that is, the light-emitting elements 114a are distributed on the opposite sides of the light-emitting elements 114b. side. Each of the light-emitting elements 114b is adjacent to a central axis C perpendicular to the light-incident surface 102, and each of the light-emitting elements 114a is away from the central axis C. The central axis C is the light incident surface 102 of the vertical light guide plate 100 and divides the light guide plate 100 into the axes of the left and right halves.

The adjacent two light-emitting elements 114a have a first pitch P1 in the direction D1, and the adjacent two light-emitting elements 114b have a second pitch P2 in the direction D1, and the first pitch P1 is greater than the second pitch P2, thereby improving the central brightness of the light guide plate 100. .

The carrier 112 is disposed on the light incident surface 102 side, and the light emitting surfaces 1140a and 1140b of the light emitting elements 114a and 114b face the light incident surface 102 of the light guide plate 100, respectively. The light-emitting element 114a has a component height h1 of a vertical distance between the light-emitting surface 1140a and the bottom surface 1142a of the carrier 112 in a direction perpendicular to the light-incident surface 102. The light-emitting element 114b also has a component height h2 of a vertical distance from the light exit surface 1140b to the bottom surface 1142b of the carrier 112 adjacent thereto in a direction perpendicular to the light-incident surface 102. The element height h1 of the light-emitting element 114a may be the same or different from the element height h2 of the light-emitting element 114b, and the element height h1 of the light-emitting element 114a as shown in FIG. 7 is smaller than the element height h2 of the light-emitting element 114b.

The cushioning members 120a, 120b may be made of, for example, a material having the ability to deform by applying compressive stress without breaking, such as foam, rubber, or the like. In Fig. 8, the side portion of the cushioning member 120a has a quadrangular shape, and the side portion of the cushioning member 120b has a semicircular shape. The buffer members 120a, 120b are respectively disposed on the carrier plate 112, the buffer member 120a is disposed between the adjacent two light-emitting elements 114a, the buffer member 120b is disposed between the adjacent two light-emitting elements 114b, and the buffer members 120a, 120b may be the number Correspondingly arranged on opposite sides of the central axis C of the light guide plate 100. The connecting faces 122a and 122b of the cushioning members 120a and 120b are respectively placed on the carrier plate 112, and the pressure receiving faces 124a and 124b respectively face the light incident surface 102 of the light guiding plate 100.

The light source module 10 illustrated in FIG. 8 is in a state of thermal equilibrium after the light-emitting element 114 has been illuminated and the light guide plate 100 has been thermally expanded. In this state, the light guide plate 100 is pressed by the buffer members 120a, 120b due to thermal expansion, and the buffer members 120a, 120b are deformed to have a pressure receiving height H2, and the pressure receiving height H2 must not be smaller than the height of the light-emitting elements 114a, 114b. H1, h2, thereby achieving the effect of protecting the light guide plate 100. In the present embodiment, since the element height h1 of the light-emitting element 114a is smaller than the element height h2 of the light-emitting element 114b, the pressure-receiving height H2 must not be smaller than the element height h2 of the light-emitting element 114b, so that the effect of protecting the light guide plate 100 can be achieved.

In the thermal equilibrium state, the lengths of the connecting faces 122a, 122b of the buffer members 120a, 120b are respectively D, and the lengths of the pressure receiving faces 124a, 124b contacting the light incident face 102 of the light guide plate 100 are respectively d, which satisfy the following conditions : 0 < d < D.

As shown in FIG. 8, the light-emitting elements 114a arranged at the first pitch P1 overlap the light-emitting angle α1 of the adjacent two light-emitting elements 114a in the transition region A2, and the intersection is located behind the light-incident surface 102 to form a dark band in the transition region A2. A4. The light-emitting elements 114b arranged at the second pitch P2 overlap the light-emitting angle α2 of the adjacent two light-emitting elements 114b before the light-incident surface 102 and form a bright band A3 in the transition region A1.

In order to overcome the problem that the light exit angle α2 of the adjacent two light-emitting elements 114b arranged at the second pitch P2 forms the bright band A3 in the transition region A2 of the light guide plate 100, the buffer member 120b may be selected to be black or gray or the like to have the light absorbing capability. In order to absorb part of the light generated by the light-emitting element 114b to reduce the amount of light entering the transition zone A2. Meanwhile, in order to overcome the problem that the light exit angle α1 of the adjacent two light-emitting elements 114a arranged at the first pitch P1 forms the dark band A4 in the transition region A2 of the light guide plate 100, the buffer member 120a may be selected to be white or silver or the like to be provided. Reflective ability. Thereby, the buffer member 120a can reflect a part of the light generated by the light-emitting element 114a to the dark band A4, and the area of the dark band A4 is reduced or even no dark band A4 is generated.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and retouched without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application.

10‧‧‧Light source module

100‧‧‧Light guide plate

102‧‧‧Into the glossy surface

110‧‧‧Light strips

112‧‧‧ Carrier Board

114, 114a, 114b‧‧‧Lighting elements

1140, 1140a, 1140b‧‧‧ light exit surface

1142, 1142a, 1142b‧‧‧ bottom

120, 120a, 120b‧‧‧ cushioning parts

122, 122a, 122b‧‧‧ connection surface

124, 124a, 124b‧‧‧ pressure surface

130‧‧‧Adhesive parts

A1‧‧‧effective light-emitting area

A2‧‧‧ transition zone

A3‧‧‧ bright band

A4‧‧‧Darkband

、, α1, α2‧‧‧ light angle

C‧‧‧ center axis

D‧‧‧ Length of the joint surface in the direction of extension of the entrance surface

D1‧‧ Direction

H1‧‧‧Unpressed height

H2‧‧‧pressure height

h, h1, h2‧‧‧ component height

L‧‧‧The distance from the light exit surface to the entrance surface

L1‧‧‧ first distance

P1‧‧‧ first spacing

P2‧‧‧Second spacing

1 is a top plan view of a light source module according to a first embodiment of the present invention;

2 is a partial enlarged view of the light source module of the first embodiment of the present invention;

3 is a perspective view of the cushioning member of the first embodiment of the present invention;

4 is a top plan view of a light source module according to a second embodiment of the present invention;

FIG. 5 is a top plan view of a light source module according to a second embodiment of the present invention; FIG.

6 is a perspective view of the cushioning member of the second embodiment of the present invention;

7 is a perspective view of a cushioning member of a third embodiment of the present invention;

FIG. 8 is a top plan view of a light source module according to a third embodiment of the present invention.

10‧‧‧Light source module

100‧‧‧Light guide plate

102‧‧‧Into the glossy surface

110‧‧‧Light strips

112‧‧‧ Carrier Board

114‧‧‧Lighting elements

1140‧‧‧Light exit surface

1142‧‧‧ bottom

120‧‧‧ cushioning parts

130‧‧‧Adhesive

A1‧‧‧effective light-emitting area

A2‧‧‧ transition zone

C‧‧‧ center axis

D‧‧‧ Length of the joint surface in the direction of extension of the entrance surface

D1‧‧ Direction

H1‧‧‧Unpressed height

h‧‧‧Component height

L‧‧‧The distance from the light exit surface to the entrance surface

L1‧‧‧ first distance

P1‧‧‧ first spacing

Claims (6)

A light source module comprising: a light guide plate having a light incident surface; a light bar disposed on the light incident surface, the light bar comprising: a carrier plate; a plurality of light emitting elements extending along one of the light incident surfaces a direction is fixed on the carrier, and a light emitting surface of each of the light emitting elements faces the light incident surface; a buffering member includes a connecting surface and a pressure receiving surface disposed oppositely, the connecting surface is disposed on the carrier The pressure receiving surface faces the light incident surface, wherein the height of the element of each of the light emitting elements is h, and the length of the connecting surface in the extending direction of the light incident surface is D, when the light emitting elements are lit, The light guide plate is thermally expanded to press the buffering member such that the length of the pressure receiving surface of the cushioning member in contact with the light incident surface of the light guide plate is d, and one of the buffer members The pressure height is H, which satisfies the following conditions: h < H; and 0 < d < D. The light source module of claim 1, wherein when the light exiting angle of each of the light emitting elements is α, and the interval between the adjacent two light emitting elements is P1, and the light emitting element is not lit, the light emitting surface is The distance to the light incident surface is L, and the cushion member is made of a material having light absorbing ability when tantalum is satisfied, tan(α/2) < P1/2L. The light source module of claim 1, wherein when the light exiting angle of each of the light emitting elements is α, and the interval between two adjacent light emitting elements is P2, and the light emitting element is not lit, the light emitting surface is The distance to the light incident surface is L, and the buffer member is made of a material having a light reflecting ability, tan(α/2) ≧ P2/2L, when the following conditions are satisfied. The light source module of claim 1, further comprising an adhesive member disposed between the carrier and the buffer member. The light source module of claim 1, wherein the connecting surface and the pressure receiving surface are connected such that a side cross section of the buffer member is a hemisphere. The light source module of claim 1, wherein the buffer member further comprises a side surface, the connecting surface and the pressure receiving surface are connected on opposite sides of the side surface, so that the side cross section of the buffer member is quadrangular.