TWM562403U - Backlight assembly - Google Patents

Abstract

The invention discloses a backlight assembly for an LCD panel assembly. The backlight assembly of the invention including a light-guiding plate, a plurality of light-emitting devices, a transparent upper barrier film, a wavelength-converting film, a transparent lower barrier film and a reflector. The LCD panel assembly defines a first display region. The transparent upper film, the wavelength-converting film and the transparent barrier film are disposed between the light-guiding plate and the reflector. The wavelength-converting film is divided into a second display region and a potential decaying region surrounding the second display region. The area of the second display region is equal to or larger than that of the first display region.

Description

Backlight combination

The present invention relates to a backlight combination for use in combination with a liquid crystal display panel, and more particularly to a backlight combination in which a wavelength conversion film is disposed under the back surface of the light guide plate and has a potential degradation region reserved.

It is well known that liquid crystal display systems display images by means of a liquid crystal panel. However, the liquid crystal panel itself does not emit light, and the light-emitting function must be achieved by a so-called backlight combination, and thus the backlight combination is an important component of the liquid crystal display device.

A typical liquid crystal display system includes a backlight combination and a liquid crystal display panel combination. A typical backlight assembly typically comprises a plurality of optical films (eg, cymbals, diffusers, etc.), light guides, reflectors, light sources, and external structures (eg, bezels, etc.). A typical liquid crystal display panel assembly comprises two glass substrates and has a liquid crystal material injected between the two glass substrates. In the assembly process of the liquid crystal display device, the combination of the backlight assembly and the liquid crystal display panel needs to be connected by the edge of the connecting member, so that the backlight combination and the liquid crystal display panel are stacked and fixed together.

At present, the backlight combination of the liquid crystal display system uses quantum dots to improve the quality of the display. Quantum dots are semiconductors in the form of nanocrystals that provide an alternative display. The electronic properties of quantum dots are usually determined by the size and shape of the nanocrystals. Quantum dots of the same material, but with different sizes, can emit different colors of light when excited. More specifically, the wavelength of the light emitted by the quantum dot varies with the size and shape of the quantum dot. In one example, larger quantum dots can emit longer wavelengths of light (eg, red light), while smaller quantums A point can emit light of a shorter wavelength (eg, blue or violet). For example, the quantum dots formed by cadmium selenide (CdSe) can be gradually modulated, emitting from a red light region of the visible spectrum from a quantum dot having a diameter of 5 nm to a violet dot emitting region of a quantum dot having a diameter of 1.5 nm. By changing the size of the quantum dots, the entire visible wavelength from about 460 nm (blue light) to about 650 nm (red light) can be emitted. The quantum dot technology is applied to a liquid crystal display system, which can greatly improve the color gamut and color vividness of the liquid crystal display system, and reduce energy consumption.

With regard to prior art techniques employing backlight combinations of quantum dots, some prior art techniques have incorporated a wavelength-transferring film comprising quantum dots onto a lower diffusion sheet in a plurality of optical films. Here, the wavelength-transfer film requires an upper and a lower transparent gas barrier film to block the wavelength-transfer film from contacting the air.

There are also prior art techniques for bonding a wavelength-transferring film comprising quantum dots to the light-emitting surface of a light guide. Here, the wavelength-transfer film also requires an upper and a lower transparent gas barrier film to block the wavelength-transfer film from contacting the air. In addition, the upper and lower transparent gas barrier films need to be coated with diffusion particles to avoid adsorption with the light guide plate and the diamond lens, which increases the material cost.

Obviously, prior art techniques using wavelength-converting films comprising quantum dots are required to be combined with upper and lower transparent gas barrier films.

It should be emphasized that even if the upper and lower transparent gas barrier films have been joined, the edge of the wavelength-transferred film will be degraded by air attack over time. It is considered that the current liquid crystal display system has a tendency to develop toward a narrow frame, that is, the shielding area around the periphery of the display screen is small. Over time, the edge of the wavelength-transfer film is degraded due to air attack, and light leakage problems occur at the edge of the backlight combination, which affects the color coordinate uniformity and picture quality of the liquid crystal display system.

Therefore, one technical problem to be solved by the present invention is to provide a backlight combination for combination of liquid crystal display panels. Backlight combination of this creation The wavelength conversion film is disposed between the light guide plate and the reflective sheet and has a potential degradation area reserved.

The backlight combination according to the first preferred embodiment of the present invention is for use in combination with a liquid crystal display panel. The liquid crystal display panel combination defines a first display area. The backlight assembly according to the first preferred embodiment of the present invention comprises a light guide plate, a plurality of light-emitting elements, a transparent gas barrier film, a wavelength conversion film, a transparent gas film, and a reflection plate. The light guide plate has a light emitting surface, a back surface opposite to the light emitting surface, and at least one light incident side. A plurality of light emitting elements are disposed adjacent to at least one light incident side of the light guide plate. A plurality of light emitting elements are used to emit the first color light. The first color light is incident from at least one light incident side of the light guide plate, and is guided by the light guide plate. The transparent upper gas barrier film is disposed on the back surface of the light guide plate. The area of the transparent gas barrier film is larger than the area of the back surface of the light guide plate. The wavelength conversion film is bonded to the transparent upper gas barrier film and covers all of the transparent upper gas barrier film. The wavelength conversion film comprises a plurality of first wavelength converting particles. The wavelength conversion film is divided into a second display area and a potentially degraded area. The potentially degraded area surrounds the second display area. The area of the second display area is equal to or larger than the area of the first display area. The transparent lower gas barrier film is bonded to the wavelength conversion film and covers all of the wavelength conversion film. The reflector is disposed under the transparent lower gas barrier film. The first portion of the first color light is converted into the second color light by the plurality of first wavelength converting particles, and then reflected by the reflecting plate to be emitted from the light emitting surface of the light guide plate. The remaining portion of the first color light is emitted from the light exit surface of the light guide plate, and is mixed with the second color light to form a third color light.

Further, the backlight assembly according to the first preferred embodiment of the present invention further includes a plurality of optical films and an inner frame. A plurality of optical films are disposed on the light exit surface of the light guide plate and define a third display area. The inner frame is connected to a plurality of optical films, a light guide plate, a transparent gas barrier film, a wavelength conversion film, a transparent lower gas barrier film, and a reflector, and is fixed together, so that the second display area is aligned with the third Display area. The inner frame has a shield to shield the potentially degraded area. Area of the second display area, etc. The area of the third display area.

In one embodiment, the plurality of first wavelength converting particles may be a plurality of first quantum dots or a plurality of first fluorescent particles.

According to a variation of the first preferred embodiment of the present invention, the wavelength conversion film further comprises a plurality of second wavelength converting particles. The second portion of the first color light is converted into the fourth color light by the plurality of second wavelength converting particles, and then reflected by the reflecting plate to be emitted from the light emitting surface of the light guide plate. The remaining portion of the first color light is emitted from the light exit surface of the light guide plate, and is mixed with the second color light and the fourth color light to form a fifth color light.

In a specific embodiment, the plurality of second wavelength converting particles may be a plurality of second quantum dots or a plurality of second fluorescent particles.

According to another variation of the first preferred embodiment of the present invention, a plurality of light-emitting elements are used to emit a sixth color light. The sixth color light is incident from at least one light incident side of the light guide plate, and is guided by the light guide plate, and then reflected by the reflection plate to be emitted from the light exit surface of the light guide plate. The remaining portion of the first color light is emitted from the light exit surface of the light guide plate, and is mixed with the second color light and the sixth color light to form a seventh color light.

The backlight combination according to the second preferred embodiment of the present invention is for use in combination with a liquid crystal display panel. The liquid crystal display panel combination defines a first display area. A backlight assembly according to a second preferred embodiment of the present invention includes a backlight module, a reflective plate, a wavelength conversion film, and a transparent upper gas barrier film. A plurality of light emitting elements. The backlight module includes a light guide plate and a plurality of light emitting elements. The light guide plate has a light emitting surface, a back surface opposite to the light emitting surface, and at least one light incident side. A plurality of light emitting elements are disposed adjacent to at least one light incident side of the light guide plate. A plurality of light emitting elements are used to emit the first color light. The first color light is incident from at least one light incident side of the light guide plate, and is guided by the light guide plate. The reflector has a reflective surface. The wavelength conversion film is bonded to the reflection surface of the reflector. The wavelength conversion film comprises a plurality of first wavelength converting particles. The wavelength conversion film is divided into a second display area and a potentially degraded area. The potentially degraded area surrounds the second display area. The area of the second display area is equal to or larger than the area of the first display area. The transparent upper gas barrier film is bonded to the wavelength conversion film and covers all of the wavelength conversion film. The reflective plate is disposed under the back surface of the light guide plate such that the transparent upper gas barrier film abuts against the back surface of the light guide plate and the second display region covers the back surface of the light guide plate. The first portion of the first color light is converted into the second color light by the plurality of first wavelength converting particles, and then reflected by the reflecting plate to be emitted from the light emitting surface of the light guide plate. The remaining portion of the first color light is emitted from the light exit surface of the light guide plate, and is mixed with the second color light to form a third color light.

Further, the backlight assembly according to the second preferred embodiment of the present invention further includes a plurality of optical films and an inner frame. A plurality of optical films are disposed on the light exit surface of the light guide plate and define a third display area. The inner frame is connected around a plurality of optical films, light guide plates, wavelength conversion films, transparent gas barrier films, and reflective plates, and is fixed together such that the second display area is aligned with the third display area. The inner frame has a shield to shield the potentially degraded area. The area of the second display area is equal to the area of the third display area.

Unlike the prior art, the backlight combination according to the present invention has its wavelength conversion film bonded to the underside or under the light guide plate. Moreover, the backlight combination according to the present invention has a reserved potential degradation area. Over time, the edge of the backlight combination according to the present invention may also have a light leakage problem, but does not affect the color coordinate uniformity and picture quality of the liquid crystal display system.

The advantages and spirit of the present invention can be further understood by the following embodiments and the drawings.

1‧‧‧Backlight combination

10‧‧‧Light guide plate

102‧‧‧Glossy surface

104‧‧‧Back

106‧‧‧light side

11‧‧‧Transparent upper gas barrier film group

12‧‧‧ wavelength conversion film

122‧‧‧First wavelength conversion particles

124‧‧‧second wavelength conversion particles

126‧‧‧Second display area

128‧‧‧ Potentially degraded areas

14‧‧‧Transparent lower gas barrier film

15‧‧‧Back cover

16‧‧‧reflector

17‧‧‧Optical diaphragm

172‧‧‧ Third display area

18‧‧‧Lighting elements

182‧‧‧Diode die

184‧‧‧Diode die

19‧‧‧ inner border

192‧‧ ‧Mask

2‧‧‧LCD panel combination

22‧‧‧First display area

3‧‧‧Backlight combination

30‧‧‧Light guide

302‧‧‧Glossy

304‧‧‧Back

306‧‧‧light side

32‧‧‧ wavelength conversion film

322‧‧‧First wavelength conversion particles

324‧‧‧second wavelength conversion particles

326‧‧‧Second display area

328‧‧‧ Potentially degraded areas

34‧‧‧Transparent upper gas barrier film

35‧‧‧Back cover

36‧‧‧reflector

362‧‧‧reflecting surface

37‧‧‧Optical diaphragm

372‧‧‧ Third display area

38‧‧‧Lighting elements

382‧‧‧Diode die

384‧‧‧Diode die

39‧‧‧ inner border

392‧‧‧Shading Department

4‧‧‧LCD panel combination

42‧‧‧First display area

L1‧‧‧first color light

L1a‧‧‧The first part of the light

L1b‧‧‧Part 2 Light

L2‧‧‧Second shade

L3‧‧‧ third color light

L4‧‧‧ fourth color light

L5‧‧‧ fifth color light

L6‧‧‧ sixth color light

L7‧‧‧ seventh color light

1 is an external view of a backlight assembly in accordance with a first preferred embodiment of the present invention.

2 is a cross-sectional view of the backlight assembly of FIG. 1 taken along line A-A.

3 is a cross-sectional view of the backlight assembly of FIG. 1 taken along line B-B.

4 is a top plan view of one of the necessary elements of a backlight assembly in accordance with a first preferred embodiment of the present invention.

Figure 5 is another cross-sectional view of the backlight assembly of Figure 1 taken along line A-A.

Figure 6 is another cross-sectional view of the backlight assembly of Figure 1 taken along line A-A.

Figure 7 is a perspective view of a backlight assembly in accordance with a second preferred embodiment of the present invention.

Figure 8 is a cross-sectional view of the backlight assembly of Figure 7 taken along line C-C.

Figure 9 is a cross-sectional view of the backlight assembly of Figure 7 taken along line D-D.

Figure 10 is a top plan view of one of the necessary elements of a backlight assembly in accordance with a second preferred embodiment of the present invention.

Figure 11 is another cross-sectional view of the backlight assembly of Figure 7 taken along line C-C.

Figure 12 is another cross-sectional view of the backlight assembly of Figure 7 taken along line C-C.

Referring to FIGS. 1 through 6, the drawings schematically illustrate a backlight assembly 1 according to a first preferred embodiment of the present invention. 1 is an external view of a backlight assembly 1 in accordance with a first preferred embodiment of the present invention. 2 is a cross-sectional view of the backlight assembly 1 of FIG. 1 taken along line A-A to schematically illustrate the architecture of the backlight assembly 1 according to the first preferred embodiment of the present invention. 3 is a cross-sectional view of the backlight assembly 1 of FIG. 1 taken along line B-B to schematically illustrate the architecture of the backlight assembly 1 according to the first preferred embodiment of the present invention. 4 is a top plan view of one of the necessary elements of the backlight assembly 1 according to the first preferred embodiment of the present invention. 5 is another cross-sectional view of the backlight assembly 1 of FIG. 1 taken along line A-A to schematically illustrate a variation of one of the backlight assemblies 1 according to the first preferred embodiment of the present invention. 6 is another cross-sectional view of the backlight assembly 1 along line A-A of FIG. 1 to schematically illustrate Another variant of the backlight combination 1 of the first preferred embodiment is created. The cross-sectional views of the liquid crystal display panel assembly 2 are also schematically shown in Figs. 2, 3, 5 and 6, respectively.

As shown in FIG. 1, FIG. 2 and FIG. 3, the backlight assembly 1 according to the first preferred embodiment of the present invention is used for the liquid crystal display panel assembly 2. The liquid crystal display panel 2 is combined to define a first display area 22.

The backlight assembly 1 according to the first preferred embodiment of the present invention includes a light guide plate 10, a plurality of light-emitting elements 18, a transparent upper gas barrier film 11, a wavelength conversion film 12, a transparent lower gas barrier film 14, and a reflection plate 16.

As shown in FIG. 2, the light guide plate 10 has a light-emitting surface 102, a back surface 104 opposite to the light-emitting surface 102, and at least one light-incident side surface 106. A plurality of light-emitting elements 18 are disposed adjacent to at least one light-incident side 106 of the light guide plate 10. A plurality of light emitting elements 18 are used to emit the first color light L1. The first color light L1 is incident from at least one light incident side surface 106 of the light guide plate 10, and is guided by the light guide plate 10.

In one embodiment, the plurality of light emitting elements 18 can include the diode die 182 of the emitted first color light L1. The diode bare crystal 18 can be a gallium nitride (GaN)-based diode bare crystal, but is not limited thereto. The first color light L1 emitted by the plurality of light-emitting elements 18 may be blue light or violet light, but is not limited thereto. A plurality of light-emitting elements 18 are soldered to a flexible circuit board (not shown). Actually, the size of the plurality of light-emitting elements 18 is small compared to the light guide plate 10, and for the sake of clarity, in FIG. 2, the size of the plurality of light-emitting elements 18 is slightly enlarged.

As shown in FIG. 3, a plurality of light-emitting elements 18 are not shown in FIG. 3, and both sides of the light guide plate 10 fall within the potentially degraded area 128. For the convenience of description, the light conducted in the light guide plate 10 and the wavelength conversion film 12 is not shown in FIG.

As shown in FIGS. 2 and 3, the transparent gas barrier film 11 is provided on the back surface 104 of the light guide plate 10. The area of the transparent upper gas barrier film 11 is larger than The area of the back surface 104 of the light guide plate 10.

Similarly, as shown in FIGS. 2 and 3, the wavelength conversion film 12 is bonded to the transparent upper gas barrier film 11 and covers all of the transparent upper gas barrier film 11. The wavelength conversion film 12 includes a plurality of first wavelength converting particles 122.

As shown in FIG. 4, the wavelength conversion film 12 is divided into a second display region 126 and a potentially degraded region 128. The potentially degraded area 128 surrounds the second display area 126. In particular, as shown in FIGS. 2 and 3, the area of the second display area 126 is equal to or larger than the area of the first display area 22.

In one embodiment, the wavelength conversion film 12 can be uniformly mixed into the resin by coating the plurality of first wavelength converting particles 122, and then the resin is coated on the transparent gas barrier film 11, and then the resin is cured to complete the wavelength conversion. Film 12.

Similarly, as shown in FIGS. 2 and 3, the transparent lower gas barrier film 14 is bonded to the wavelength conversion film 12 and covers all of the wavelength conversion film 12. The reflecting plate 16 is disposed under the transparent lower gas barrier film 14.

In one embodiment, both the transparent upper gas barrier film 11 and the transparent lower gas barrier film 14 may be formed of a polymer material, for example, polyethylene terephthalate (PET), polyacrylate. (polyacrylate), polystyrene, polyimide, polyacrylamide, polyethylene, polyvinyl, poly-diacetylene, poly Polyphenylene-vinylene, polypeptide, polysaccharide, polysulfone, polypyrrole, polyimidazole, polythiophene, polyether ), epoxy, silica glass silica gel, siloxane, polyphosphate, hydrogel, agarose ),fiber (cellulose), etc.

The first partial light L1a of the first color light L1 is converted into the second color light L2 by the plurality of first wavelength converting particles 122, and is reflected by the reflecting plate 16 to be emitted from the light emitting surface 102 of the light guiding plate 10. The remaining portion of the first color light L1 is emitted from the light exit surface 102 of the light guide plate 10, and is mixed with the second color light L2 to form the third color light L3. In practical applications, the third color light L3 may be white light, but is not limited thereto. Obviously, the backlight assembly 1 according to the first preferred embodiment of the present invention has a reserved potential degradation area 128. Over time, the edge of the backlight assembly 1 according to the first preferred embodiment of the present invention may also A light leakage problem occurs, but does not affect the color coordinate uniformity and picture quality of the liquid crystal display system 2.

In one embodiment, the plurality of first wavelength converting particles 122 may be a plurality of first quantum dots or a plurality of first fluorescent particles. The plurality of first quantum dots may be formed of a first II-VI compound, a first III-V compound, a first IV-VI compound, a first Group IV compound, or a mixture of the above compounds.

In a specific embodiment, the first II-VI compound forming the first quantum dot used in the present invention may be composed of CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, CdSeS, CdSeTe, CdSTe. , ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe or others Form II-VI compounds.

In a specific embodiment, the first III-V compound forming the first quantum dot used in the present invention may be made of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb. , GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb or III-V compounds are formed.

In a specific embodiment, the first IV-VI compound forming the first quantum dot used in the present invention may be composed of SnS, SnSe, SnTe, PbS, PbSe, PbTe, SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe. Formed by SnPbS, SnPbSe, SnPbTe, SnPbSSe, SnPbSeTe, SnPbSTe or other IV-VI compounds.

In one embodiment, the first Group IV compound forming the first quantum dot employed in the present application may be formed from Si, Ge, SiC, SiGe, or other Group IV compounds.

Further, as shown in FIG. 1, FIG. 2 and FIG. 3, the backlight assembly 1 according to the first preferred embodiment of the present invention further includes a plurality of optical films 17 and an inner frame 19. The plurality of optical films 17 may comprise a crepe, a diffusion sheet, and the like. A plurality of optical films 17 are disposed on the light-emitting surface 102 of the light guide plate 10, and define a third display region 172. The inner frame 19 is connected to the periphery of the plurality of optical films 17, the light guide plate 10, the transparent upper gas barrier film 11, the wavelength conversion film 12, the transparent lower gas barrier film 14, and the reflection plate 16, and is fixed together, thereby causing The second display area 126 is aligned with the third display area 172. The inner bezel 19 has a shield 192 to shield the potentially degraded region 128, as shown in Figures 2 and 3. The area of the second display area 126 is equal to the area of the third display area 172. In a specific embodiment, the inner frame 19 can be made of a polymer material, but is not limited thereto. According to the first preferred embodiment of the present invention, the edge of the backlight assembly 1 has a light leakage problem, and the shielding portion 192 of the inner frame 19 shields the potentially degraded region 128, thereby ensuring that the color coordinates of the liquid crystal display system 2 are not affected. Uniformity and picture quality. The lower surface of the liquid crystal display system 2 can be attached to the inner frame 19.

Further, as shown in FIG. 1, FIG. 2 and FIG. 3, the backlight assembly 1 according to the first preferred embodiment of the present invention further includes a back cover 15. The plurality of optical films 17, the light guide plate 10, the transparent upper gas barrier film 11, the wavelength conversion film 12, the transparent lower gas barrier film 14, and the reflection plate 16 which are fixed together by the inner frame 19 are disposed in the back cover 15. In a specific embodiment, the back cover 15 can be made of metal, but is not limited thereto.

According to a variation of the first preferred embodiment of the present invention, as shown in FIG. 5, the wavelength conversion film 12 further includes a plurality of second wavelength converting particles 124. The second partial light L1b of the first color light L1 is converted into the fourth color light L4 by the plurality of second wavelength converting particles 124, and is reflected by the reflecting plate 16 to be emitted from the light emitting surface 102 of the light guiding plate 10. The remaining portion of the first color light L1 is emitted from the light exit surface 102 of the light guide plate 10, and is mixed with the second color light L2 and the fourth color light L4 to form a fifth color light L5. In practical applications, the fifth color light L5 may be white light, but is not limited thereto. The components in FIG. 5 having the same reference numerals as those in FIG. 2 have the same or similar structures and functions, and will not be further described herein.

In one embodiment, the plurality of second wavelength converting particles 124 may be a plurality of second quantum dots or a plurality of second fluorescent particles. Similarly, the plurality of second quantum dots may be formed of a second II-VI compound, a second III-V compound, a second IV-VI compound, a second Group IV compound, or a mixture of the above compounds.

According to another variation of the first preferred embodiment of the present invention, as shown in FIG. 6, a plurality of light-emitting elements 18 are used to emit a sixth color light L6. The sixth color light L6 is incident from at least one light incident side surface 106 of the light guide plate 10, is guided by the light guide plate 10, and is reflected by the reflection plate 16 to be emitted from the light exit surface 102 of the light guide plate 10. The remaining portion of the first color light L1 is emitted from the light-emitting surface 102 of the light guide plate 10, and is mixed with the second color light L2 and the sixth color light L6 to form the seventh color light L7. In practical applications, the seventh color light L7 may be white light, but is not limited thereto. The components in FIG. 6 having the same reference numerals as those in FIG. 2 have the same or similar structures and functions, and will not be further described herein.

In one embodiment, the plurality of light-emitting elements 18 may further comprise a diode die 184 of the emitted sixth color light L6, as shown in FIG. The diode die 184 can show a gallium nitride-based diode bare crystal, but is not limited thereto. The sixth color light L6 emitted by the plurality of light-emitting elements 18 may be red light, but is not limited thereto.

Referring to FIG. 7 to FIG. 12, the drawings schematically illustrate a backlight assembly 3 according to a second preferred embodiment of the present invention. Figure 7 is an external view of a backlight assembly 3 in accordance with a second preferred embodiment of the present invention. 8 is a cross-sectional view of the backlight assembly 3 of FIG. 7 taken along line C-C to schematically illustrate the architecture of the backlight assembly 3 according to the second preferred embodiment of the present invention. 9 is a cross-sectional view of the backlight assembly 3 of FIG. 7 taken along the line D-D to schematically illustrate the architecture of the backlight assembly 3 according to the second preferred embodiment of the present invention. Figure 10 is a top plan view of one of the necessary elements - wavelength conversion film 32 of a backlight assembly 3 in accordance with a second preferred embodiment of the present invention. 11 is another cross-sectional view of the backlight assembly 3 of FIG. 7 taken along line C-C to schematically illustrate a variation of one of the backlight assemblies 3 according to the second preferred embodiment of the present invention. 11 is another cross-sectional view of the backlight assembly 3 of FIG. 7 taken along line C-C to schematically illustrate another variation of the backlight assembly 3 according to the second preferred embodiment of the present invention. The cross-sectional views of the liquid crystal display panel assembly 4 are also schematically shown in Figs. 8, 9, 11, and 12, respectively.

As shown in FIG. 7, FIG. 8, and FIG. 9, the backlight assembly 3 according to the second preferred embodiment of the present invention is used for the liquid crystal display panel assembly 4. The liquid crystal display panel combination 4 defines a first display area 42.

The backlight assembly 3 according to the first preferred embodiment of the present invention includes a light guide plate 30, a plurality of light-emitting elements 38, a wavelength conversion film 32, a transparent upper gas barrier film 34, and a reflection plate 36.

As shown in FIG. 8, the light guide plate 30 has a light exit surface 302, a back surface 304 opposite to the light exit surface 302, and at least one light incident side surface 306. Multiple hair The light element 38 is disposed adjacent to at least one light incident side 306 of the light guide plate 30. A plurality of light emitting elements 38 are used to emit the first color light L1. The first color light L1 is incident from at least one light incident side surface 306 of the light guide plate 30, and is guided by the light guide plate 30.

In one embodiment, the plurality of light emitting elements 38 can include the diode die 382 of the emitted first color light L1. The diode bare crystal 38 can exhibit a gallium nitride-based diode bare crystal, but is not limited thereto. The first color light L1 emitted by the plurality of light-emitting elements 38 may be blue light or violet light, but is not limited thereto. A plurality of light-emitting elements 38 are soldered to a flexible circuit board (not shown). Actually, the size of the plurality of light-emitting elements 38 is small compared to the light guide plate 30, and for the sake of clarity, in FIG. 8, the size of the plurality of light-emitting elements 38 is slightly enlarged.

As shown in FIG. 9, a plurality of light-emitting elements 38 are not shown in FIG. 9, and both sides of the light guide plate 30 fall within the potentially degraded area 328. For the convenience of description, the light conducted in the light guide plate 30 and the wavelength conversion film 32 is not shown in FIG.

As also shown in FIGS. 8 and 9, the reflecting plate 36 has a reflecting surface 362. The area of the reflecting surface 362 of the reflecting plate 36 is larger than the area of the back surface 304 of the light guiding plate 30. The wavelength conversion film 32 is bonded to the reflection surface 362 of the reflection plate 36. The wavelength conversion film 32 includes a plurality of first wavelength converting particles 322.

As shown in FIG. 10, the wavelength conversion film 32 is divided into a second display area 326 and a potentially degraded area 328. The potentially degraded region 328 surrounds the second display region 326. In particular, as shown in FIGS. 8 and 9, the area of the second display area 326 is equal to or larger than the area of the first display area 42.

In a specific embodiment, the wavelength conversion film 32 can be uniformly mixed into the resin by coating the plurality of first wavelength converting particles 322, and then the resin is coated on the reflecting surface 362 of the reflecting plate 36, and then curing the resin to complete the wavelength. The conversion film 32 is used.

Similarly, as shown in FIGS. 8 and 9, the transparent upper gas barrier film 34 is bonded to the wavelength conversion film 32 and covers the entire wavelength conversion film 32. unit. The reflective plate 36 is disposed under the back surface 304 of the light guide plate such that the transparent upper gas barrier film 34 abuts against the back surface 304 of the light guide plate 30, and the second display region 326 covers the back surface 304 of the light guide plate 30. The material for forming the transparent upper gas barrier film 34 is the same as the material for forming the transparent lower gas barrier film 14, and will not be described herein.

The first partial light L1a of the first color light L1 is converted into the second color light L2 by the plurality of first wavelength converting particles 322, and is reflected by the reflecting plate 36 to be emitted from the light emitting surface 302 of the light guide plate 30. The remaining portion of the first color light L1 is emitted from the light exit surface 302 of the light guide plate 30, and is mixed with the second color light L2 to form the third color light L3. In practical applications, the third color light L3 may be white light, but is not limited thereto. Obviously, the backlight assembly 3 according to the second preferred embodiment of the present invention requires only a transparent upper gas barrier film 34. Moreover, the backlight assembly 3 according to the second preferred embodiment of the present invention has a reserved potential degradation region 328. Over time, the edge of the backlight assembly 3 according to the second preferred embodiment of the present invention may also have The light leakage problem occurs, but does not affect the color coordinate uniformity and picture quality of the liquid crystal display system 4.

In one embodiment, the plurality of first wavelength converting particles 322 can be a plurality of first quantum dots or a plurality of first fluorescent particles. The plurality of first quantum dots may be formed of a first II-VI compound, a first III-V compound, a first IV-VI compound, a first Group IV compound, or a mixture of the above compounds.

Further, as shown in FIGS. 7, 8, and 9, the backlight assembly 3 according to the second preferred embodiment of the present invention further includes a plurality of optical films 37 and inner portions 39. The plurality of optical films 37 may comprise a crepe, a diffusion sheet, and the like. A plurality of optical films 37 are disposed on the light-emitting surface 302 of the light guide plate 30, and define a third display region 372. The inner frame 39 is connected to the periphery of the plurality of optical films 37, the light guide plate 30, the wavelength conversion film 32, the transparent upper gas barrier film 34, and the reflection plate 36, and is fixed together, so that the second display region 326 is aligned. Three display areas 372. The inner bezel 39 has a shield 392 to shield the potentially degraded region 328. The area of the second display area 326 is equal to the third The area of the display area 372. In a specific embodiment, the inner frame 39 can be made of a polymer material, but is not limited thereto. According to the second preferred embodiment of the present invention, the edge of the backlight assembly 3 has a light leakage problem, and the hidden portion 328 is shielded by the shielding portion 392 of the inner frame 39, thereby ensuring that the color coordinates of the liquid crystal display system 4 are not affected. Uniformity and picture quality. The lower surface of the liquid crystal display system 4 can be attached to the inner bezel 39. The reflecting plate 36 can be attached to the inner frame 39.

Further, as shown in FIGS. 7, 8, and 9, the backlight assembly 3 according to the second preferred embodiment of the present invention further includes a back cover 35. A plurality of optical films 37, a light guide plate 30, a wavelength conversion film 32, a transparent upper gas barrier film 34, and a reflection plate 36, which are fixed together by the inner frame 39, are disposed in the back cover 35. In one embodiment, the back cover 35 may be made of metal, but is not limited thereto.

According to a variation of the second preferred embodiment of the present invention, as shown in FIG. 11, the wavelength conversion film 32 further includes a plurality of second wavelength converting particles 324. The second partial light L1b of the first color light L1 is converted into the fourth color light L4 by the plurality of second wavelength converting particles 324, and is reflected by the reflecting plate 36 to be emitted from the light emitting surface 302 of the light guiding plate 30. The remaining portion of the first color light L1 is emitted from the light exit surface 302 of the light guide plate 30, and is mixed with the second color light L2 and the fourth color light L4 to form a fifth color light L5. In practical applications, the fifth color light L5 may be white light, but is not limited thereto. The elements in FIG. 11 having the same reference numerals as in FIG. 8 have the same or similar structures and functions, and will not be described herein.

In one embodiment, the plurality of second wavelength converting particles 324 can be a plurality of second quantum dots or a plurality of second fluorescent particles. Similarly, the plurality of second quantum dots may be formed of a second II-VI compound, a second III-V compound, a second IV-VI compound, a second Group IV compound, or a mixture of the above compounds.

According to another variation of the second preferred embodiment of the present invention, As shown in FIG. 12, a plurality of light-emitting elements 38 are used to emit a sixth color light L6. The sixth color light L6 is incident from at least one light incident side surface 306 of the light guide plate 30, is guided by the light guide plate 30, and is reflected by the reflection plate 36 to be emitted from the light exit surface 302 of the light guide plate 30. The remaining portion of the first color light L1 is emitted from the light exit surface 302 of the light guide plate 30, and is mixed with the second color light L2 and the sixth color light L6 to form the seventh color light L7. In practical applications, the seventh color light L7 may be white light, but is not limited thereto. The components in Fig. 12 having the same reference numerals as those in Fig. 8 have the same or similar structures and functions, and will not be further described herein.

In one embodiment, the plurality of light emitting elements 38 may further comprise a diode die 384 of the emitted sixth color light L6, as shown in FIG. The diode bare crystal 384 can show a gallium nitride-based diode bare crystal, but is not limited thereto. The sixth color light L6 emitted by the plurality of light-emitting elements 38 may be red light, but is not limited thereto.

By way of a detailed description of the preferred embodiments, it is believed that one would understand that the present invention is different from the prior art. According to the backlight combination of the present invention, the wavelength conversion film is bonded to the back surface of the light guide plate by a transparent gas barrier film, or bonded to the reflection surface of the reflection plate, even if only a transparent gas barrier film is used. Moreover, according to the creation of the backlight combination, there is a reserved potential degradation area. Over time, the edge of the backlight combination according to the present invention may also have a light leakage problem, but does not affect the color coordinate uniformity and picture quality of the liquid crystal display system. .

The features and spirit of the present invention are more clearly described in the above detailed description of the preferred embodiments, and are not intended to limit the scope of the present invention. On the contrary, the purpose is to cover all kinds of changes and equivalence arrangements within the scope of the patent application to which the present invention is intended. Therefore, the scope of the patent application filed by this creator should be interpreted broadly based on the above description so that it covers all possible changes and equivalent arrangements.

Claims (14)

A backlight assembly for use in a combination of a liquid crystal display panel, the liquid crystal display panel combination defining a first display area, the backlight assembly comprising: a light guide plate having a light exiting surface opposite to the light emitting surface a back surface and at least one light incident side; a plurality of light emitting elements disposed adjacent to the at least one light incident side, the plurality of light emitting elements for emitting a first color light, the first color light being emitted from the at least one light incident side And a transparent gas barrier film disposed on the back surface, the transparent upper gas barrier film has an area larger than the back surface; and a wavelength conversion film is bonded to the transparent gas barrier And covering the entire upper film of the gas barrier film, the wavelength conversion film comprises a plurality of first wavelength converting particles, wherein the wavelength converting film is divided into a second display area and a potential degradation area, the potential degradation area surrounding the a second display area, the area of the second display area is equal to or larger than the area of the first display area; a transparent lower gas barrier film is bonded to the wavelength Replacing the film and covering all of the wavelength conversion film; and a reflecting plate disposed under the transparent lower gas barrier film; wherein the first portion of the first color light is converted by the plurality of first wavelength converting particles A second color light is then emitted from the light exit surface by the reflection plate, and the remaining portion of the first color light is emitted from the light exit surface and mixed with the second color light to form a third color light. The backlight combination of claim 1, wherein the plurality of first wavelength converting particles are a plurality of first quantum dots or a plurality of first fluorescent particles. The backlight combination of claim 2, wherein the wavelength conversion film further comprises a plurality of second wavelength converting particles, wherein the second portion of the first color light is converted into a fourth color light by the plurality of second wavelength converting particles The reflection from the reflector is emitted from the light exit surface, and the remaining portion of the first color light is emitted from the light exit surface and mixed with the second color light and the fourth color light to form a fifth color light. The backlight combination of claim 3, wherein the plurality of second wavelength converting particles are a plurality of second quantum dots or a plurality of second fluorescent particles. The backlight assembly of claim 2, wherein the plurality of illuminating elements are configured to emit a sixth color light, the sixth color light is incident from the at least one light incident side and guided by the light guide plate, and the reflection is further performed by the reflection The plate reflection is emitted from the light exiting surface, and the remaining portion of the first color light is emitted from the light emitting surface and mixed with the second color light and the sixth color light to form a seventh color light. The backlight assembly of claim 2, further comprising: a plurality of optical films disposed on the light-emitting surface and defining a third display area; and an inner frame coupled to the plurality of optical films, The light guide plate, the transparent upper gas barrier film, the wavelength conversion film, the transparent lower gas barrier film, and the periphery of the reflector are fixed together, such that the second display area is aligned with the third display area. The bezel has a shielding portion to shield the potentially degraded region, wherein an area of the second display region is equal to an area of the third display region. The backlight assembly of claim 6, further comprising: a back cover, wherein the plurality of optical films fixed by the inner frame, the light guide plate, the transparent upper gas barrier film, the wavelength conversion film, the A transparent lower gas barrier film and the reflector are disposed in the back cover. A backlight assembly for use in a combination of a liquid crystal display panel, the liquid crystal display panel combination defining a first display area, the backlight assembly comprising: a light guide plate having a light exiting surface opposite to the light emitting surface a back surface and at least one light-incident side; and a plurality of light-emitting elements disposed adjacent to the at least one light-incident side, the plurality of light-emitting elements for emitting a first color light, the first color light being from the at least one light-incident side Injecting and guiding by the light guide plate; a reflector having a reflective surface, wherein the reflective surface has an area larger than the area of the back surface; a wavelength conversion film is bonded to the reflective surface, the wavelength conversion film includes a plurality of first wavelength-converting particles, the wavelength conversion film being divided into a second display area and a potential degradation area, the potential degradation area surrounding the second display area, the area of the second display area being equal to or greater than the first An area of the display area; and a transparent upper gas barrier film bonded to the wavelength conversion film and covering all of the wavelength conversion film, wherein Based on the reflection plate disposed below the rear surface, resulting in gas barrier film tightly against the back surface and the back surface of the second display region on the transparent cover; The first portion of the first color light is converted into a second color light by the plurality of first wavelength converting particles, and then reflected by the reflecting plate is emitted from the light emitting surface, and the remaining portion of the first color light is emitted from the light emitting surface. The light is emitted and mixed with the second color light to form a third color light. The backlight combination of claim 8, wherein the plurality of first wavelength converting particles are a plurality of first quantum dots or a plurality of first fluorescent particles. The backlight combination of claim 9, wherein the wavelength conversion film further comprises a plurality of second wavelength converting particles, and the second portion of the first color light is converted into a fourth color light by the plurality of second wavelength converting particles The reflection from the reflector is emitted from the light exit surface, and the remaining portion of the first color light is emitted from the light exit surface and mixed with the second color light and the fourth color light to form a fifth color light. The backlight combination of claim 10, wherein the plurality of second wavelength converting particles are a plurality of second quantum dots or a plurality of second fluorescent particles. The backlight assembly of claim 9, wherein the plurality of illuminating elements are configured to emit a sixth color light, the sixth color light is incident from the at least one light incident side and guided by the light guide plate, and then reflected by the light guide plate The plate reflection is emitted from the light exiting surface, and the remaining portion of the first color light is emitted from the light emitting surface and mixed with the second color light and the sixth color light to form a seventh color light. The backlight assembly of claim 9, further comprising: a plurality of optical films disposed on the light-emitting surface and defining a third display area; and an inner frame coupled to the plurality of optical films, The light guide plate, the wavelength conversion film, the transparent upper gas barrier film, and the periphery of the reflector The two display areas are fixed to each other such that the second display area is aligned with the third display area. The inner frame has a shielding portion to shield the potentially degraded area, wherein the area of the second display area is equal to the area of the third display area. The backlight assembly of claim 13, further comprising: a back cover, wherein the plurality of optical films, the light guide plate, the wavelength conversion film, the transparent upper gas barrier film, and the same are fixed by the inner frame A reflector plate is disposed in the back cover.