WO2016137158A1

WO2016137158A1 - Liquid crystal display device

Info

Publication number: WO2016137158A1
Application number: PCT/KR2016/001620
Authority: WO
Inventors: 김영삼; 이종칠; 김형준
Original assignee: 엘지디스플레이 주식회사
Priority date: 2015-02-26
Filing date: 2016-02-17
Publication date: 2016-09-01
Also published as: CN208937869U; KR20160104386A; KR102317270B1

Abstract

A liquid crystal display device according to one embodiment of the present invention is configured so as to comprise: a first member for converting light of a light source into white light; and a second member for converting light which is not delivered to the first member also into white light. Thereby, provided is a liquid crystal display device which improves the defect of light leakage of a liquid crystal panel.

Description

Liquid crystal display

The present invention relates to a liquid crystal display device. More particularly, the present invention relates to a liquid crystal display device including a color conversion layer for converting light emitted from a light source into white light, wherein a part of light of a light source not transmitted to the color conversion layer is formed by a color layer positioned around the light source. By configuring to be converted to white light, it is to provide a liquid crystal display device that can reduce the screen quality due to the leakage of light of the light source.

In general, a liquid crystal display device (LCD) is driven by an image realization principle due to optical anisotropy and polarization of liquid crystal. Such a liquid crystal display device is an essential component of a liquid crystal panel bonded through a liquid crystal layer between two substrates, and generates an electric field in the liquid crystal panel to change the arrangement direction of the liquid crystal molecules to change the transmittance difference. Implement

However, since the liquid crystal panel does not have a self-luminous element, in order to display the difference in transmittance as an image, a separate light source for emitting white light is required. As a light source of the liquid crystal display, a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), or a light emitting diode (LED) may be used. In particular, since light emitting diodes have advantages of small size, low power consumption, high reliability, and the like, they are widely used as light sources of liquid crystal displays.

Meanwhile, the light source of the liquid crystal display including the light emitting diode may include a blue light emitting diode and a yellow phosphor. More specifically, a part of the blue light emitted from the blue light emitting diode is absorbed by the yellow phosphor and converted into yellow light, and the yellow light converted by the yellow phosphor and the remaining blue light not absorbed by the phosphor are mixed with each other, whereby white light Is implemented.

However, in the case of a light source composed of a blue light emitting diode and a yellow phosphor, light loss occurs because it is difficult to control and color-combine each of the wavelength of the blue light emitting diode and the wavelength of the yellow phosphor, which results in color reproduction of the liquid crystal display. Causes a decrease.

Recently, in order to improve the color reproducibility of the liquid crystal display, a structure in which a layer including quantum dots is separately disposed in a light source that emits blue light has been considered. Specifically, the light of the blue wavelength emitted from the light source passes through the layer including the quantum dots and is converted into the light of the red wavelength and the light of the green wavelength, and the converted red light and the light of the green wavelength are converted into the blue wavelength of the light source. It is mixed with the light of, white light is realized.

A quantum dot is a nanometer (nm) -sized semiconductor crystal material in which the wavelength of light emitted varies depending on the size of the particle. The smaller the size of the particle, the shorter the wavelength of light, and the larger the size of the particle. It emits light with a long wavelength. Quantum dots have high light emission quantum efficiency and convenient color control, which is advantageous for high color reproducibility.

However, as the layer including the quantum dots is spaced apart from the light source, a problem may occur in that the screen quality is degraded by the light leakage. Specifically, it is as follows. In the structure in which the light source is composed of a blue light emitting diode and a yellow phosphor, the light source itself emits white light, and the white light of the light source is incident on the liquid crystal panel through a light guide plate or the like. In contrast, in the structure in which the layer including the quantum dots is disposed separately from the light source, the blue light of the light source is transmitted to the layer including the quantum dots, and the light is converted into white light by the layer containing the quantum dots and incident on the liquid crystal panel. do. That is, since the light source and the layer including the quantum dots are disposed apart from each other by various mechanisms, all the light of the light source may not be incident on the layer including the quantum dots and light may be leaked. In this way, when the leaked blue light is incident on the liquid crystal panel as it is, some screens of the liquid crystal panel may also lead to poor light leakage, which may be blue, resulting in a problem of deterioration of screen quality.

Such blue light leakage defects may be generated in various parts of the liquid crystal panel according to positions of the layers including the light source and the quantum dots. For example, in the structure in which the light source is disposed at a position corresponding to the outer side of the liquid crystal panel, since light leakage occurs in the outer portion of the liquid crystal panel, blue light leakage defects may also occur in the outer portion of the liquid crystal panel. In this case, in order to block the blue light leakage defect, since the outer part of the liquid crystal panel must be covered by another apparatus, it may lead to another problem that the bezel area of the liquid crystal display is increased.

Accordingly, the inventor of the present invention recognizes the above-mentioned problem in a structure in which a light source emitting blue light and a layer including quantum dots are separately disposed, and do not merely shield the leaked light. We thought about a new structure that could convert the leaking light itself into white light. Accordingly, the inventor of the present invention has invented a liquid crystal display device having a new structure capable of improving blue light leakage defects and improving screen quality.

According to an aspect of the present invention, there is provided a liquid crystal display including: a first member converting light of a light source into white light, and a second light converting light not transmitted to the first member of the light source into white light; It is provided to include a member, to provide a liquid crystal display device that can solve the problem of screen quality degradation due to poor light leakage of the light source.

Problems according to an embodiment of the present invention are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

The liquid crystal display according to the exemplary embodiment of the present invention includes a liquid crystal panel, a light guide plate, and a light source. The light guide plate includes a light incident surface and a light exit surface in contact with the light incident surface, and is disposed below the liquid crystal panel. The light source is disposed corresponding to the light incident surface of the light guide plate so that light is incident into the light guide plate. In addition, the liquid crystal display includes a color conversion layer between the liquid crystal panel and the light exit surface of the light guide plate, and a color layer spaced apart from the color conversion layer and disposed to overlap at least a part of the light exit surface of the light guide plate. In the liquid crystal display according to the exemplary embodiment of the present invention, the light of the light source is configured to be converted into white light by the color layer, thereby providing a liquid crystal display device in which a problem of deterioration of screen quality due to light leakage of the light source is improved. have.

A liquid crystal display according to an exemplary embodiment of the present invention includes a light source, a first member converting light from a light source into white light, and a second member disposed around the light source and converting light not transmitted to the first member into white light. Member. Accordingly, it is possible to provide a liquid crystal display device in which light leakage defects of the liquid crystal panel due to the light source are improved.

According to an exemplary embodiment of the present invention, the light leakage defect of the light source may be improved by configuring some light of the light source not transmitted to the color conversion layer to be converted into white light by a color layer positioned around the light source.

Accordingly, the screen quality of the liquid crystal display device is improved.

In addition, since the light leakage defect generated in the outer portion of the liquid crystal panel does not need to be covered by a separate mechanism, the problem of increasing the bezel of the liquid crystal display may be improved.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

Since the content of the invention described in the problem, the problem solving means, and the effect to be solved above does not specify the essential features of the claim, the scope of the claims is not limited by the matter described in the content of the invention.

1A is a plan view of a liquid crystal display according to an exemplary embodiment of the present invention.

FIG. 1B is a cross-sectional view illustrating II ′ of FIG. 1A.

2 is a cross-sectional view illustrating a path and conversion of light in the liquid crystal display according to the exemplary embodiment of the present invention.

3A to 3C are plan views illustrating various embodiments of a color layer in a liquid crystal display according to an exemplary embodiment of the present invention.

4 is a cross-sectional view of a liquid crystal display according to another exemplary embodiment of the present invention.

5 is a cross-sectional view of a liquid crystal display according to another exemplary embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention and to provide general knowledge in the technical field to which the present invention pertains. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims.

Shapes, sizes, ratios, angles, numbers, and the like disclosed in the drawings for describing the embodiments of the present invention are exemplary, and the present invention is not limited to the illustrated items. Like reference numerals refer to like elements throughout. In addition, in describing the present invention, if it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In the case where 'comprises', 'haves', 'consists of' and the like mentioned in the present specification are used, other parts may be added unless 'only' is used. In the case where the component is expressed in the singular, the plural includes the plural unless specifically stated otherwise.

In interpreting a component, it is interpreted to include an error range even if there is no separate description.

In the case of the description of the positional relationship, for example, if the positional relationship of the two parts is described as 'on', 'upon', 'lower', 'next to', etc. Alternatively, one or more other parts may be located between the two parts unless 'direct' is used.

For a description of a temporal relationship, for example, if the temporal after-relationship is described as 'after', 'following', 'after', 'before', etc. This may include non-consecutive unless' is used.

The first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are only used to distinguish one component from another. Therefore, the first component mentioned below may be a second component within the technical spirit of the present invention.

The size and thickness of each component shown in the drawings are shown for convenience of description, and the present invention is not necessarily limited to the size and thickness of the illustrated configuration.

The features of each of the various embodiments of the invention may be combined or combined with one another, in whole or in part, and various interlocking and driving technically may be possible, and each of the embodiments may be independently implemented with respect to each other or may be implemented in association with each other. It may be.

Hereinafter, a liquid crystal display according to exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1A is a plan view of a liquid crystal display 100 according to an exemplary embodiment of the present invention, and FIG. 1B is a cross-sectional view illustrating II ′ of FIG. 1A. 1A and 1B, the liquid crystal display 100 according to an exemplary embodiment of the present invention may include a mechanism member 10, a light guide plate 30, a light source 40, a liquid crystal panel 80, and a first member ( 50, a second member 70, a reflective layer 60 and an additional reflective layer 20. In FIG. 1A, only the mechanical member 10, the first member 50, the additional reflective layer 60, and the light source 40 are shown for convenience of explanation.

The liquid crystal panel 80 is a key component for image representation of the liquid crystal display device 100 and has a structure in which a liquid crystal layer is interposed between two substrates. The liquid crystal panel 80 uses a principle that the arrangement direction of liquid crystal molecules is changed by an electric field applied between two electrodes. When light of the light source 40 passing through the light guide plate 30 is supplied to the liquid crystal panel 80, The amount of light transmitted according to the alignment direction of the liquid crystal molecules may be adjusted to express a desired image.

Referring to FIG. 1B, the light guide plate 30 is disposed below the liquid crystal panel 80, and includes a light incident surface 30a and a light exit surface 30b in contact with the light incident surface 30a. The light guide plate 30 serves to disperse the light of the light source 40 incident on the light incident surface 30a to the entire area of the light exit surface 30b. The light guide plate 30 may be made of a transparent material, and for example, polyolefine, polystyrene, glass, polymethyl methacrylate (PMMA), polycarbonate (PC), or silicone rubber (silicon) rubber).

As shown in FIG. 1B, the light source 40 is disposed corresponding to the light incident surface 30a of the light guide plate 30. The light source 40 emits light having a blue wavelength, and the light of the emitted light source 40 is incident into the light guide plate 30 through the light incident surface 30a of the light guide plate 30. Although not shown, the light source 40 may include a plurality of blue light emitting diodes, and the plurality of blue light emitting diodes may be arranged on the circuit board at regular intervals. In addition, the light source 40 may emit light having a blue wavelength of about 430 nm or more and 480 nm or less.

The first member 50 is disposed between the liquid crystal panel 80 and the light exit surface 30b of the light guide plate 30, and converts the light of the light source 40 into white light. Thus, the first member 50 may be referred to as a color conversion layer.

The first member 50 may be a layer including quantum dots. As mentioned above, the quantum dot is a nanometer (nm) -sized semiconductor crystal material in which the wavelength of light emitted according to the size of particles is high, and it is advantageous to realize high color reproducibility due to high photoluminescence quantum efficiency and convenient color control. . In addition, since the quantum dots are made of an inorganic material, there is an advantage in that the quantum dot has a long life compared to an organic light emitting diode (OLED) made of an organic material.

The light of the blue wavelength of the light source 40 is converted into the light of the red wavelength and the light of the green wavelength by the quantum dots included in the first member 50, and the converted red light and the light of the green wavelength are light sources The white light is finally mixed by mixing with the blue wavelength of 40.

The first member 50 may include at least two kinds of quantum dots of different sizes. For example, the first member 50 may include quantum dot particles having a size capable of emitting light of a red wavelength and quantum dot particles having a size capable of emitting light of a green wavelength. The quantum dots may be Group-VI, Group-V or group materials, and specifically, CdSe, CdTe, CdS, ZnSe, ZnTe, ZnS, InP, GaP, GaInP2, PbS, ZnO, TiO2, AgI, AgBr, HgI2, It may be at least one of PbSe, In2S3, In2Se3, Cd3P2, Cd3As2, and GaAs.

As the material of the quantum dot, cadmium-based compounds such as cadmium selenide (CdSe), cadmium telluride (CdTe), and cadmium sulfide (CdS) may be used, but recently, the use of cadmium, which is a hazardous substance, In consideration of problems such as cost and stability, non-cadmium-based quantum dots have also been continuously studied.

The first member 50 is a layer including quantum dots, and is positioned on the light guide plate 30 in the form of an optical sheet or a film, as shown in FIGS. 1A and 1B. Can be. Alternatively, a layer including quantum dots may be directly coated on the light emitting surface 30b of the light guide plate 30.

The second member 70 is positioned around the light source 40 and serves to convert the light that is not transmitted to the first member 50 into white light. More specifically, referring to FIG. 1B, the second member 70 is spaced apart from the first member 50 and disposed to overlap at least a portion of the light exit surface 30b of the light guide plate 30. In addition, the light of the light source 40 is converted into white light by the second member 70.

The second member 70 may be a color layer having a color having a complementary color relationship with the color of the light of the light source 40. That is, when the light source 40 emits light having a blue wavelength, the second member 70 may be a yellow print layer or a coating layer, and at this time, the wavelength of the light reflected by the second member 70 may be about. It may be 560 nm or more and 590 nm.

In the liquid crystal display 100 according to the exemplary embodiment of the present invention, the light of the light source 40 is converted into white light by the first member 50, and the light that is not transmitted to the first member 50 may also be formed. It is converted into white light by the two members 70. In order to explain this process in more detail with reference to FIG. 2 as follows. 2 is a cross-sectional view for describing a path of light and color conversion in the liquid crystal display 100 according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the light L of the light source 40 is incident into the light guide plate 30 through the light incident surface 30a of the light guide plate 30, and the incident light is emitted from the light exit surface 30b of the light guide plate 30. It is delivered to the first member 50 through). The transmitted light is converted into the first white light WL1 by the first member 50 and is incident on the liquid crystal panel 80.

As mentioned above, the light source 40 and the first member 50 are arranged to be separated from each other by a predetermined distance or more by a mechanical structure. Accordingly, the light L emitted from the light source 40 does not all enter the light guide plate 30, and light leaks may be generated. In this case, the leaked light does not pass through the first member 50. It may not be incident directly to the liquid crystal panel 80. More specifically, as shown in FIGS. 1B and 2, the first member 50 and the second member 70 may have a relationship with a tolerance, a process, or a peripheral device in the manufacturing process of the liquid crystal display device 100. Since it is designed in consideration of such, it is arranged to be spaced apart to some extent. As a result, a gap G exists between the first member 50 and the second member 70, and the leaked blue light is a gap between the first member 50 and the second member 70. Since the light is incident directly to the liquid crystal panel 80 through (G), a light leakage defect occurs in which some screens of the liquid crystal panel 80 have a blue color. In addition, when a separate mechanism is disposed on the outer portion of the liquid crystal panel 80 to cover the blue light leakage defect of the liquid crystal panel 80, another problem that the bezel of the liquid crystal display device 100 is increased. May be caused.

In the liquid crystal display device 100 according to an exemplary embodiment of the present invention, the light that is not incident to the light guide plate 30 and is emitted upward, or the light that is not transmitted to the first member 50 is also converted into white light and then the liquid crystal. By configuring to be incident on the panel 80, the blue light leakage defect of the liquid crystal panel 80 can be effectively improved. Specifically, as shown in FIG. 2, upwardly emitted light that is not incident into the light guide plate 30 or light that is not transmitted to the first member 50 may be disposed in the vicinity of the light source 40. The member 70 converts the second white light WL2. Thereafter, the converted second white light WL2 is emitted into the spaced gap G between the first member 50 and the second member 70 and is incident on the liquid crystal panel 80. ), The poor blue light leakage may be improved, thereby improving the screen quality. In addition, since the blue light leakage defect does not need to be covered by a separate device, the problem of increasing the bezel of the liquid crystal display 100 may be improved.

The luminance difference between the brightness of the first white light WL1 converted by the first member 50 and the second white light WL2 converted by the second member 70 may have a value of about 100 nits or less. . As shown in FIG. 2, the light L of the light source 40 is converted into the first white light WL1 by the first member 50 and is incident on the liquid crystal panel 80, and the second member 70. ) Is converted into the second white light WL2 and is incident on the liquid crystal panel 80. Therefore, if the luminance difference between the first white light WL1 and the second white light WL2 is too large, an uneven luminance difference occurs in the screen of the liquid crystal panel 80, and thus, the screen quality may be deteriorated. Can be.

Similarly, the color coordinates Wx and Wy of the first white light WL1 converted by the first member 50 and the color coordinates Wx and W2 of the second white light WL2 converted by the second member 70. The difference in Wy) may have a value of about 0.005 or less. More specifically, the difference between Wx of the first white light WL1 and Wx of the second white light WL2 may have a value of about 0.005 or less, and Wy of the first white light WL2 and the second white light The difference in Wy of WL2 may have a value of about 0.005 or less. Accordingly, the color non-uniformity problem of the liquid crystal panel 80 due to the first white light WL1 and the second white light WL2 may not occur, so that screen quality may be improved.

As described above, the second member 70 is disposed to be spaced apart from the first member 50 around the light source 40, and at least a part of the second member 70 overlaps the light exit surface 30b of the light guide plate 30. In order to describe the formation position of the second member 70 in more detail, the following description will be given with reference to FIG. 1B.

As shown in FIG. 1B, the liquid crystal display 100 according to the exemplary embodiment further includes a mechanism member 10 for accommodating the light source 40, the light guide plate 30, and the additional reflective layer 20. It may include. In addition, the instrument member 10 includes a vertical portion 10b corresponding to the side surface of the light source 40 and a horizontal portion 10a corresponding to the upper surface of the light source 40, and the light source 40 includes the instrument member ( 10 is accommodated in a form surrounded by the vertical portion 10b and the horizontal portion 10a.

The reflective layer 60 may be disposed on the inner surface of the horizontal portion 10a of the mechanism member 10. The reflective layer 60 serves to guide the light emitted from the light source 40 and not incident to the light guide plate 30 to be incident to the light guide plate 30. The material of the reflective layer 60 may be, for example, any one of acryl or polyethyleneterephthalate (PET). In FIG. 1B, although the end of the reflective layer 60 and the end of the horizontal portion 10a of the mechanism member 10 are shown at the same position, the reflective layer is used to reflect more light emitted above the light source 40. The end of the 60 may be configured to protrude more than the end of the horizontal portion 10a.

In addition, an additional reflective layer 20 may be disposed on the bottom surface of the light guide plate 30. The additional reflective layer 20 reflects the light of the light source 40 incident into the light guide plate 30 and transmits the light to the first member 50 more. The additional reflective layer 20 may be made of the same material as the reflective layer 60.

In addition, although not shown in the drawings, a plurality of optical films may be additionally disposed between the light guide plate 30 and the liquid crystal panel 80. The optical films may include, for example, a diffuser sheet and a prism sheet as a component for increasing the light efficiency of the liquid crystal display 100. The diffusion sheet scatters the light emitted from the light guide plate 30 in a predetermined direction to uniformly spread the light on the entire liquid crystal panel 80. The prism sheet has a structure in which prism in the form of a triangular column is arranged on the surface at regular intervals, and serves to enhance light efficiency of the liquid crystal panel 80 by refracting and condensing light passing through the diffusion sheet.

As shown in FIG. 1B, the second member 70 may be disposed to be in contact with at least a portion of the inner surface of the reflective layer 60. In other words, the second member 70 may be a color layer printed or coated on at least a portion of an inner surface of the reflective layer 60. To more specifically describe this, referring to FIGS. 3A and 3C as follows.

3A to 3C illustrate various embodiments of the second member 70, that is, the color layer, disposed in contact with the inner surface of the reflective layer 60 in the liquid crystal display device 100 according to the exemplary embodiment of the present invention. It is a top view showing. For convenience of explanation, all parts except for the reflective layer 60, the color layer 70, the light source 40, and the light guide plate 30 when viewed from the top are omitted.

Although not illustrated in the drawing, the second member 70 may be positioned to correspond to the entire inner surface of the reflective layer 60. In this case, since most of the light emitted upward of the light source 40 is easily converted into white light by the second member 70, it may be effective in the blue light leakage defect in which the blue light of the light source 40 leaks as it is. .

Alternatively, as shown in FIG. 3A, the end of the second member 70a may be configured to be positioned inside the end of the reflective layer 60. That is, the second member 70a may be configured to be positioned at a portion other than the entire region of the inner surface of the reflective layer 60 instead of the entire region of the inner surface of the reflective layer 60. In this case, a portion of the end portion of the reflective layer 60 in which the second member 70a is not disposed is an offset region, and the color of the end portion of the second member 70a may cause the liquid crystal panel 80 to have a different color. Other problems that can be caused by visual recognition can be minimized.

Referring to FIG. 3B, the second member 70b may be printed in a dot form on the inner surface of the reflective layer 60. In this case, the light of the upwardly emitted light source 40 is converted into white light through the second member 70b printed on the reflective layer 60 and the reflective layer 60 on which the second member 70b is not printed. Through the inner surface of the light emitted from the upwardly emitted light source 40 may be incident back into the light guide plate (30). That is, since the reflection function of the reflective layer 60 and the white light conversion function of the second member 70b can be properly adjusted and utilized, more free optical design may be possible.

Referring to FIG. 3C, the second member 70c may be configured of the first color layer 71 and the second color layer 72. As mentioned above, since the second member 70c should be made of a color complementary to the color of the light of the light source 40, the combination of the colors of the first color layer 71 and the second color layer 72 is the light source 40. ) Should be configured to be complementary to the color of light. For example, the first color layer 71 may be a red printing or coating layer, and the second color layer 72 may be a green printing or coating layer. In this case, the wavelength of the light reflected by the first color layer 71 and the second color layer 72 of the second member 70c may be about 530 nm or more and 720 nm, respectively. In this case, the blue light emitted upward from the light source 40 may be converted into white light by being repeatedly reflected to the first color layer 71 and the second color layer 72, respectively.

The second member 70 disposed on the inner surface of the reflective layer 60 is not necessarily limited to the structure described above with reference to FIGS. 3A to 3C, and the light of the light source 40 that is not transmitted to the first member 50 is not limited. It may have various structures for converting to white light.

Therefore, in the liquid crystal display device 100 according to the exemplary embodiment of the present invention, referring to FIGS. 1 to 3, the light emitted upward of the light source 40 or the light that is not transmitted to the first member 50 may be used. By arranging the second member 70 for converting the light into white light around the light source 40, the poor blue light leakage of the liquid crystal panel 80 can be improved and the screen quality can be improved. In addition, as a separate device, since it is not necessary to cover the outer portion of the liquid crystal panel 80 where a blue light leakage defect occurs, the problem of increasing the bezel of the liquid crystal display 100 may also be improved.

4 is a cross-sectional view of a liquid crystal display 200 according to another exemplary embodiment of the present invention, and FIG. 5 is a cross-sectional view of the liquid crystal display 300 according to another exemplary embodiment of the present invention. In the following description of the embodiments, detailed descriptions of the same or corresponding components as the previous embodiment will be omitted. Compared with the previous embodiment, the present embodiments differ only in the formation position of the second member 70, which will be described in detail below.

Referring to FIG. 4, the second member 70 may be disposed to directly contact at least a portion of an inner surface of the horizontal portion 10a of the instrument member 10. In this case, by directly forming the second member 70 on the inner surface of the mechanism member 10, there is an effect that the process and cost can be shortened. In addition, by including a highly reflective material in the second member 70, the second member 70 converts the light of the light source 40 that is not transmitted to the first member 50 to white light, and By reflecting the upwardly emitted light of the 40 to act again to enter the light guide plate 30, it can be utilized to design the mechanism more variously. Alternatively, the instrument member 10 may replace the role of the reflective layer 60 by configuring the material of the instrument member 10, in particular, the materials of the horizontal portion 10a and the vertical portion 10b with a highly reflective material. .

Referring to FIG. 5, the second member 70 may be disposed such that the inner surface of the vertical portion 10b extends to at least a partial region from the inner surface of the horizontal portion 10a of the instrument member 10. That is, since the second member 70 is disposed to surround the upper surface and the side surface of the light source 40, more light from the light source 40 that is not transmitted to the first member 50 is caused by the second member 70. Since it can be converted into white light, the blue light leaking into the gap between the first member 50 and the second member 70 can be minimized, whereby the blue light leakage defect of the liquid crystal panel 80 is also minimized. Can be effective.

In the liquid crystal display according to the exemplary embodiment of the present invention, the apparatus may further include a mechanism member for accommodating the light source and the light guide plate, and the mechanism member may include a vertical portion corresponding to the side of the light source and a horizontal portion corresponding to the top surface of the light source. have.

In the liquid crystal display according to the exemplary embodiment of the present invention, the liquid crystal display may further include a reflective layer disposed on an inner surface of the horizontal portion, and the color layer may be disposed to contact at least a portion of an inner surface of the reflective layer.

In the liquid crystal display according to the exemplary embodiment of the present invention, the end of the color layer may be located inside the end of the reflective layer.

In the liquid crystal display according to the exemplary embodiment, the color layer may be disposed to be in contact with at least a portion of the inner surface of the horizontal part.

In the liquid crystal display according to the exemplary embodiment, the color layer may extend from the inner surface of the horizontal portion to at least a portion of the inner surface of the vertical portion.

In the liquid crystal display according to the exemplary embodiment, the color of the light of the light source and the color of the color layer may be complementary to each other.

In the liquid crystal display according to the exemplary embodiment, the wavelength of light of the light source may be 430 nm or more and 480 nm or less, and the wavelength of light reflected by the color layer may be 530 nm or more and 720 nm or less.

In the liquid crystal display according to the exemplary embodiment of the present invention, the light source may include a blue light emitting diode, and the color layer may be a yellow layer.

In the liquid crystal display according to the exemplary embodiment, the light of the light source incident into the light guide plate may be converted into white light by the color conversion layer and incident on the liquid crystal panel.

In the liquid crystal display according to the exemplary embodiment, white light converted by the color layer may pass through the color conversion layer and the color layer and enter the liquid crystal panel.

In the liquid crystal display according to the exemplary embodiment, the luminance difference between the luminance of the white light converted by the color layer and the luminance of the white light converted by the color conversion layer may be 100 nit or less.

In the liquid crystal display according to the exemplary embodiment of the present invention, the color coordinate difference between the color coordinates (Wx, Wy) of the white light converted by the color layer and the white light (Wx, Wy) converted by the color conversion layer is 0.005. It may be:

In the liquid crystal display according to the exemplary embodiment of the present invention, the white light converted by the second member may be emitted to a spaced gap between the first member and the second member.

In the liquid crystal display according to another exemplary embodiment, the first member and the second member may be disposed between the light guide plate and the liquid crystal panel.

In the liquid crystal display according to another exemplary embodiment, the luminance difference between the luminance of the white light converted by the first member and the luminance of the white light converted by the second member may be 100 nit or less.

In the liquid crystal display according to the exemplary embodiment of the present invention, the difference between the color coordinates (Wx, Wy) of the white light converted by the first member and the color coordinates (Wx, Wy) of the white light converted by the second member is 0.005. It may be:

In the liquid crystal display according to the exemplary embodiment of the present invention, the first member may include a quantum dot.

Although the embodiments of the present invention have been described in more detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention. . Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The protection scope of the present invention should be interpreted by the claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims

Liquid crystal panels;

A light guide plate disposed under the liquid crystal panel, the light guide plate including a light incident surface and a light exit surface in contact with the light incident surface;

A light source disposed to correspond to a light incident surface of the light guide plate such that light is incident into the light guide plate;

A color conversion layer disposed between the liquid crystal panel and the light exit surface of the light guide plate; And

A color layer spaced apart from the color conversion layer and disposed to overlap at least a portion of the light exit surface of the light guide plate;

The light of the light source is converted into white light by the color layer.
According to claim 1,

Further comprising a mechanism member for receiving the light source and the light guide plate,

And the mechanism member includes a vertical portion corresponding to the side surface of the light source and a horizontal portion corresponding to an upper surface of the light source.
The method of claim 2,

Further comprising a reflective layer disposed on the inner surface of the horizontal portion,

And the color layer is in contact with at least a portion of an inner surface of the reflective layer.
The method of claim 3, wherein

An end of the color layer is positioned inside the end of the reflective layer.
The method of claim 2,

And the color layer is in contact with at least a portion of an inner surface of the horizontal part.
The method of claim 5,

And the color layer extends from an inner surface of the horizontal portion to at least a portion of an inner surface of the vertical portion.
According to claim 1,

The color of the light of the light source and the color of the color layer has a complementary color relationship with each other.
The method of claim 7, wherein

The wavelength of light of the light source is 430 nm or more and 480 nm or less,

A wavelength of light reflected by the color layer is 530 nm or more and 720 nm or less.
The method of claim 7, wherein

The light source includes a blue light emitting diode, and the color layer is a yellow layer.
According to claim 1,

The light of the light source incident into the light guide plate is converted into white light by the color conversion layer and is incident on the liquid crystal panel.
The method of claim 10,

The white light converted by the color layer passes through the color conversion layer and the color layer to enter the liquid crystal panel.
The method of claim 11, wherein

And a luminance difference between the luminance of the white light converted by the color layer and the white light converted by the color conversion layer is 100 nit or less.
The method of claim 11, wherein

The difference in the color coordinates (Wx, Wy) of the white light converted by the color layer and the color coordinates (Wx, Wy) of the white light converted by the color conversion layer are each 0.005 or less.
Light source;

A first member converting light of the light source into white light; And

And a second member positioned around the light source and converting light not transmitted to the first member into white light.
The method of claim 14,

And white light converted by the second member is emitted to a spaced gap between the first member and the second member.
The method of claim 14,

And the first member and the second member are disposed between the light guide plate and the liquid crystal panel.
The method of claim 14,

The luminance difference between the luminance of the white light converted by the first member and the white light converted by the second member is 100 nit or less.
The method of claim 14,

The difference between the color coordinates (Wx, Wy) of the white light converted by the first member and the color coordinates (Wx, Wy) of the white light converted by the second member is 0.005 or less.
The method of claim 14,

The first member includes a quantum dot.