TWI510603B - Sealant material and display device - Google Patents

Description

Frame glue material and display device

The present invention relates to a sealant material and a display device using the sealant material, and more particularly to a sealant material and a display device which use the excitation light generated by the photoexcited light material to excite the photoinitiator to generate a polymerization reaction.

A conventional liquid crystal display panel is mainly composed of an array substrate, an opposite substrate, and a liquid crystal layer disposed between the two substrates. The array substrate and the opposite substrate are generally bonded by a sealant, and the liquid crystal layer is sealed between the two substrates by a sealant. The array substrate has a display area and a peripheral area on the outer side of the display area. The display area is provided with a pixel array for providing a display screen, and the peripheral area is provided with peripheral traces such as gate wires and data wires, and the opposite substrate. A position corresponding to the peripheral area is generally provided with a light shielding pattern such as a black matrix. The commonly used sealant is a light-hardened sealant. The polymerization reaction must be completed after sufficiently illuminating the light of the corresponding wavelength range to provide an adhesive effect. However, the above-mentioned peripheral traces and the black matrix both block the light and affect the polymerization of the sealant. reaction. Therefore, in a general design, the position of the sealant will try to avoid the area where the black matrix is disposed. However, in the design of a slim border, since the area of the peripheral area is limited, the sealant must be applied to the area where the black matrix is disposed, and therefore the gap between the peripheral traces on the array substrate is utilized. The frame glue is subjected to an illuminating reaction. The gap between the surrounding traces also needs to be reduced as much as possible due to the consideration of the narrow bezel design, so it is easy to cause the adhesive reaction in this case to be incomplete and affect the adhesion, thereby making the display panel production yield and Product reliability issues.

One of the main purposes of the present invention is to provide a frame material and a display device. The photoexcitation light material is disposed in the sealant material, so that the excitation light generated by the photoexcitation light material can be used to complete the polymerization of the unpolymerized sealant, thereby achieving the purpose of improving the adhesive strength of the frame and the reliability of the display device.

In order to achieve the above object, a preferred embodiment of the present invention provides a sealant material comprising a photoinitiator and a photoexcitation material. The photoexcited light material absorbs a first light of a first wavelength range for generating a second light of a second wavelength range, and the second light is used to excite the photoinitiator to cause a polymerization reaction of the sealant material.

In order to achieve the above object, a preferred embodiment of the present invention provides a display device including a first substrate, a second substrate, a sealant layer, and a liquid crystal layer. The first substrate is disposed opposite to the second substrate. The sealant layer is disposed between the first substrate and the second substrate for bonding the first substrate and the second substrate, and the sealant layer comprises the above-mentioned sealant material. The liquid crystal layer is disposed between the first substrate and the second substrate, and the sealant layer surrounds the liquid crystal layer.

10‧‧‧First substrate

20‧‧‧second substrate

30‧‧‧Block layer

30M‧‧‧Frame material

31‧‧‧Photoinitiators

32‧‧‧Photoluminescent materials

40‧‧‧Liquid layer

50‧‧‧ shading pattern

50S‧‧‧slit

60‧‧‧ shading layer

100‧‧‧ display device

200‧‧‧ display device

L1‧‧‧First light

L2‧‧‧second light

L3‧‧‧3rd light

W1‧‧‧ first width

W2‧‧‧ second width

Fig. 1 is a schematic view showing a display device of a first embodiment of the present invention.

Fig. 2 is a partially enlarged schematic view showing the display device of the first embodiment of the present invention.

Fig. 3 is a schematic view showing the sealant material of the first embodiment of the present invention.

Fig. 4 is a view showing the photoreaction of the photoexcited light material of the first embodiment of the present invention.

Fig. 5 is a schematic view showing a display device of a second embodiment of the present invention.

The present invention will be further understood by those of ordinary skill in the art to which the present invention pertains. .

Please refer to Figure 1 and Figure 2. 1 is a schematic view showing a display device according to a first embodiment of the present invention, and FIG. 2 is a partially enlarged schematic view showing the display device of the present embodiment. For the convenience of description, the drawings of the present invention are only for the purpose of understanding the present invention, and the detailed proportions thereof can be adjusted according to the design requirements. As shown in FIGS. 1 and 2, the display device 100 of the present embodiment includes a first substrate 10, a second substrate 20, a sealant layer 30, and a liquid crystal layer 40. The first substrate 10 is disposed opposite to the second substrate 20. The sealant layer 30 is disposed between the first substrate 10 and the second substrate 20 for bonding the first substrate 10 and the second substrate 20. The liquid crystal layer 40 is disposed between the first substrate 10 and the second substrate 20 , and the sealant layer 30 surrounds the liquid crystal layer 40 . The sealant layer 30 of the present invention includes the sealant material 30M. In other words, the sealant layer 30 is formed by the polymerization of the sealant material 30M, and the detailed features of the sealant material 30M will be described later. In addition, the display device 100 of the embodiment may further include a plurality of light shielding patterns 50 and a light shielding layer 60. The light shielding layer 60 is disposed on the first substrate 10, and the light shielding pattern 50 is disposed on the second substrate 20. The sealant layer 30 is disposed between the light shielding layer 60 and the light shielding pattern 50, and a slit 50S is disposed between the adjacent light shielding patterns 50. In the present embodiment, the width of the slit 50S and the light shielding pattern 50 is preferably greater than or equal to 1. When the sealant material 30M undergoes polymerization, the first light L1 illuminates the sealant material 30M through the slit 50S. For example, the light shielding pattern 50 and the slit 50S may have a first width W1 and a second width W2 in the horizontal direction, respectively, and the ratio of the second width W2 to the first width W1 is preferably greater than or equal to 1, but not This is limited to this. In addition, at least one of the first substrate 10 and the second substrate 20 of the embodiment may include an array substrate, a color filter substrate, or other substrate used in the display. For example, the second substrate 20 of the embodiment may be an array substrate, the light shielding pattern 50 may be a metal wire on the array substrate, and the first substrate 10 may be a color filter substrate or a counter substrate provided with the light shielding layer 60. , but not limited to this. It should be noted that the sealant layer 30 of the embodiment is disposed between the light shielding layer 60 and the light shielding pattern 50, so that the size of the frame region of the display device 100 can be reduced, thereby achieving the effect of narrow borders.

In order to further explain the sealant material 30M of the present embodiment, please refer to FIGS. 2 to 4 . FIG. 3 is a schematic view showing the sealant material of the embodiment, and FIG. 4 is a schematic view showing the photoreaction of the photoexcited light material of the embodiment. As shown in FIGS. 2 to 4, the sealant material 30M of the present embodiment includes a photoinitiator 31 and a photoexcited light material 32. The photoexcited light material 32 absorbs the first light ray L1 of the first wavelength range for exciting the second light ray L2 of the second wavelength range, and the second light ray L2 can be used to excite the photoinitiator 31 to produce the sealant material 30M. The polymerization reaction is carried out to form a sealant layer 30. The photoexcitation material 32 comprises a fluorescent material or a phosphorescent material such as bromobenzene (C ₆ H ₅ Br), phenate ion (C ₆ H ₅ O ^- ), aniline (Aniline, C ₆ H ₅ NH) ₂ ) Benzoic acid (C ₆ H ₅ COOH), Fluorene and its derivatives such as 9-(4-tert-Butylphenyl)-3,6-bis[9-(4-methoxyphenyl)-9H -fluoren-9-yl]-9H-carbazole), ruthenium complex such as Ir(1-phenyl-3-methyl-imidazolin-2ylindene) ₃ , Ir(1-phenyl-3-methyl-benzimidazolin-2ylindene) _3, etc. Materials or other suitable materials. The photoinitiator 31 includes a benzene ring, an acetophenone or the like or other suitable material. In the present embodiment, the sealant material 30M further includes an acrylic monomer, a hardener, an epoxy resin monomer, a filler, and other suitable materials.

In the present invention, the wavelength range of the absorption light of the photoinitiator 31 is preferably between 300 nm and 500 nm, but the invention is not limited thereto, and other photoinitiators that absorb the wavelength range of light are not limited thereto. It can also be applied to the sealant material of the present invention. In addition, the first wavelength range of the first light L1 and the second wavelength range of the second light L2 are between 300 nm and 500 nm, and the first wavelength range and the second wavelength range are preferably between 300 and 300 nm. Nano to 450 nm, but not limited to this. The second wavelength range is preferably equal to or higher than the first wavelength range, but is not limited thereto. As shown in FIG. 3, when the first light L1 illuminates the sealant material 30M through the slit 50S, part of the photoinitiator 31 can be directly irradiated by the first light L1 to react, but is located below the light shielding pattern 50. The photoinitiator 31 is not directly irradiated by the first light L1, causing the partial sealant material 30M to be incompletely reacted. Meanwhile, the first light L1 penetrating the slit 50S is also irradiated to the photoexcited light material 32, and the photoexcited light material 32 absorbs the first light L1 and excites the second light L2, and the second light L2 is irradiated to the unreacted light initiator 31 which is shielded by the light-shielding pattern 50 to cause the polymerization of the sealant material 30M to be completed. That is, the photo-exciting light material 32 of the present invention can cause the partial sealant material 30M not irradiated by the first light ray L1, and the second ray L2 generated by the excitation of the photo-excited light material 32 to promote the partial sealant material. The 30M polymerization reaction is complete, thereby increasing the adhesion between the sealant material 30M and the substrate.

In addition, please refer to Figure 3, Figure 4 and the following relation (1). When the first light L1 illuminates the light-exciting light material 32, in addition to the third light L3 passing through the light-exciting light material 32, a second light L2 (excitation light) in a lateral direction (or other indefinite direction) may be generated. The intensity of the second light ray L2 is proportional to the intensity difference between the first light ray L1 and the third light ray L3, and the intensity of the second light ray L2 is also affected by the material properties of the photoexcited light material 32 itself. In relation (1), F represents the intensity of the second ray L2, k represents a constant relating to the measured parameters of the instrument, φ represents the quantum efficiency of the photoexcited light material 32, P ₀ represents the intensity of the first ray L1, and a represents The light absorption coefficient of the photoexcited light material 32, b represents the path length of the light through the photoexcited light material 32, and c represents the concentration of the photoexcited light material 32. The intensity of the second light ray L2 can be estimated by the relation (1), and the material properties of the desired photoexcited light material 32 can be reversed according to the relationship.

F=2.303kφP ₀ abc (1)

In addition, in order to explain the condition between the weight percentage of the photoexcited light material 32 in the sealant material 30M and the illumination intensity under the light shielding pattern 50, please refer to Table 1, which lists different weight percentages of photoexcited light materials. The illumination intensity change under the light shielding pattern 50 is irradiated with the first light L1 of different intensity. As shown in Table 1, the higher the weight percentage of the photoexcitation light material 32, the higher the light intensity under the light shielding pattern 50, but if the excessive proportion of the photoexcitation light material 32 is considered to be the adhesion to the sealant material 30M, Force has a negative impact. The desired illumination intensity can be calculated according to the material composition or composition ratio of the sealant material 30M and the photoinitiator 31, and the weight percentage of the appropriate photoexcitation light material 32 can be selected according to the corresponding first light L1 intensity. . According to the results of Table 1, the weight percentage of the photoexcitation material 32 of the present embodiment in the sealant material 30M is preferably greater than or equal to 1% and less than or equal to 20%, but the invention is not limited thereto. In other embodiments of the present invention, the weight percentage of the photoexcitation light material 32 may be adjusted to an appropriate ratio depending on the properties of the materials in the sealant material 30M.

Please refer to Figure 5. Fig. 5 is a schematic view showing a display device of a second embodiment of the present invention. As shown in FIG. 5, the display device 200 of the present embodiment is different from the first embodiment in that the light shielding layer 60 of the present embodiment is not provided with the sealant layer 30, so that the frame adhesive material 30M is irradiated. A light ray L1 may be irradiated from one side of the first substrate 10 (ie, irradiated from the lower side of FIG. 5), and in this design, the line width and the gap of the light shielding pattern 50 (for example, a metal wire) on the second substrate 20 It can be more unrestricted, thereby improving the variability in the layout of the line. This embodiment The display device 200 is similar to the above-described first embodiment except for the position where the light shielding layer 60 is disposed, and thus will not be described herein.

In summary, the present invention utilizes a photoexcitation light material in a sealant material, so that the excitation light generated by the photoexcitation light material causes the unpolymerized frame glue to complete polymerization, thereby achieving the purpose of improving the adhesive strength of the frame. In addition, the display device using the sealant material of the present invention to form the sealant layer can also achieve the purpose of improving production yield and product reliability under the design of the narrow bezel.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

10‧‧‧First substrate

20‧‧‧second substrate

30‧‧‧Block layer

30M‧‧‧Frame material

31‧‧‧Photoinitiators

32‧‧‧Photoluminescent materials

50‧‧‧ shading pattern

50S‧‧‧slit

60‧‧‧ shading layer

L1‧‧‧First light

L2‧‧‧second light

Claims (12)

A sealant material comprising: a photoinitiator; and a photoexcited light material, wherein the photoexcited light material absorbs a first light of a first wavelength range to generate a second wavelength range Two rays, and the second light is used to excite the photoinitiator to cause a polymerization reaction of the sealant. The sealant material of claim 1, wherein the photoinitiator has an absorption light wavelength ranging from 300 nm to 500 nm. The sealant material of claim 1, wherein the first wavelength range is between 300 nm and 500 nm. The sealant material of claim 1, wherein the second wavelength range is between 300 nm and 500 nm. The sealant material of claim 1, wherein the photoexcitation material comprises a fluorescent material or/and a phosphorescent material. The sealant material according to claim 1, wherein the photoexcitation material comprises Bromobenzene (C ₆ H ₅ Br), Phenolate ion (C ₆ H ₅ O ^- ), aniline (Aniline, C). ₆ H ₅ NH ₂ ), Benzoic acid (C ₆ H ₅ COOH), Fluorene and its derivatives or hydrazine complex. The sealant material of claim 1, wherein the weight percentage of the photoexcitation material in the sealant material is greater than or equal to 1% and less than or equal to 20%. The sealant material of claim 1, wherein the photoinitiator comprises a benzene ring or an acetophenone photoinitiator. The sealant material as claimed in claim 1 further comprising an acrylic monomer, a hardener, an epoxy resin monomer or a filler. A display device includes: a first substrate; a second substrate disposed opposite the first substrate; a sealant layer disposed between the first substrate and the second substrate for bonding the first substrate And the second substrate, wherein the sealant layer comprises the sealant material according to any one of claims 1 to 9; and a liquid crystal layer disposed between the first substrate and the second substrate Wherein the sealant layer surrounds the liquid crystal layer. The display device of claim 10, further comprising: a light shielding layer disposed on the first substrate; and a plurality of light shielding patterns disposed on the second substrate, wherein the sealant layer is disposed on the light shielding layer And a slit is disposed between the two adjacent light shielding patterns, and a ratio of a width of the slit to a width of each of the light shielding patterns is greater than or equal to 1. The display device of claim 10, wherein at least one of the first substrate and the second substrate comprises an array substrate or a color filter substrate.