TW200827408A - Anthocyanidin-added filter applying in plasma display panel - Google Patents

Abstract

The filter of the present invention comprises at least an anthocyanidin compound whose maximum absorbance is between 560 nm and 630 nm. According to the present invention, the filter can provide to eliminate stray lights mainly existed between 530 nm to 700 nm with excellent durability. The plasma display apparatus which use disclosed filter can improve the contrast in the brightness area and can improve the color purity of the light emitting color.

Description

200827408 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a filter for a plasma display and a cyanine dye used therefor. [Prior Art] Recently, a plasma display panel (PDP) has become a focus of being used as a large-screen flat panel display. The plasma display panel seals discharge gases such as neon (Ne), argon (Ar), xenon (Xe), etc., and then uses vacuum ultraviolet (UV) to emit red, green, and blue scales. Light 'supplied to provide two primary colors. However, because the blessing of the wind is emitted at about 590 rnn when the excited helium atom returns to the ground state, it is difficult to obtain a bright red color. To solve this problem, a plasma display filter is added to the plasma display panel so that the visible light of red (R), green (G), and blue (B) is passed through the filter. The orange light at a wavelength of about 590 nm and the near-infrared light at a wavelength of 800 to 1000 nm are blocked. The near-infrared absorbing film (NIR film) should have good durability at high temperatures and high humidity, and have a high absorption rate in the near-infrared region having a wavelength of 800 to 1200 nm, particularly a wavelength of 850 to 1000 legs. Further, the absorbing film preferably has a visible light transmittance of at least 60% for visible light having a wavelength of 430 to 700 nm. However, the filter that is mainly used at 590 nm without using light and using the pigment efficiency of 200827408, although the market demand is very high, the current situation is still not practical. Suitable dyes are exemplified in U.S. Patent No. 5,804,102 and U.S. Patent Application Serial No. 2001-0005278, the entire disclosure of which is incorporated herein by reference in its entirety, for example, the the the the the the the the the the the the the the the the Salt), strontium salt, anthraquinone, naphthol, and metal complexes. The above-mentioned pigment which can absorb unnecessary light will be significantly degraded under the conditions of use environment or temperature, light, heat and the like caused by the display device. It is a technique that is expected to have sufficient durability and that will exist in the vicinity of 590 nm without requiring light removal. SUMMARY OF THE INVENTION The present inventors have found through intensive studies by the inventors that the above problem can be easily solved by adding a cyanine dye having absorption at 560 mri to 630 nm to an optical filter. In other words, the present invention is an optical filter containing at least one cyanine dye having a maximum absorption wavelength between 560 nm and 630 nm and an absorption coefficient of 525 nm not exceeding 50% of the maximum absorption wavelength. In the present invention, the cyanine dye (the following formula 1) is used as a main component constituting the optical filter for specific light absorption, and the absorption of visible light between 560 nm and 630 nm by the chemical molecule can effectively make the optical filter have the optical filter. Functionally and effectively solve the aforementioned problems. 6 200827408

N〇2

Wherein 'R1 and R2 may be the same or each independently an alkyl group having 1 to 4 carbon atoms. [Embodiment] The optical filter of the present invention is characterized in that the constituent member contains at least a formula a compound having a maximum absorption in a wavelength region of 560 to 630 nm, and an absorption coefficient at 550 nm relative to 525. The ratio of the absorption coefficient of nm in the solvent (JIS K0115) is preferably above h2, preferably 15 or more, to! 8 or more is better. The plasma display panel has a green light-emitting peak near 525 nm, and the right absorption coefficient ratio is 12 or more, so that the brightness of the display device can be reduced, and only unnecessary light existing near 590 nm can be deleted efficiently. In Formula 1, Ri and R2 may be the same or each of a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, and a t-butyl group. Among them, & is butyl, and & is preferably ethyl. The filter structure of the present invention preferably has: (1) at least a transparent substrate, a conductive layer and a functional transparent layer, and at least one of the three layers contains the structure of the pigment of the present invention; (ii) at least In addition to the transparent substrate, the conductive layer, and the 7200827408 functional transparent layer, there is a structure containing the toner layer of the pigment of the present invention. The method of supporting the dye on the member is not particularly limited. Specifically, the dye is contained in the ruthenium molecular molded body, and the processing temperature and the film forming conditions are different depending on the type of the matrix resin to be mixed with the dye. The pigment is added to the powder or granules of the matrix resin, heated to 15 〇 to 35 (rc and melted, preferably after kneading, and then formed into a plastic sheet, a plastic particle, etc.). The amount of the pigment is usually a matrix resin. 1 (wt) ppm to 20 (wt)% of the molded body. Specific examples of the preferable heat resistance of the dye used in the present invention are the absorption retention ratio of the maximum absorption wavelength of the dye which is maintained at 25 〇 in an environment of 8 ° C. After that, it is still more than 8〇%, preferably 80% or more after 500 hours or more, especially after maintaining 1000 hours or more and more than 8〇%. Hereinafter, the components which can be used for the above optical filter are subjected to simple

The moon-permeable substrate is mainly a film and a plate, and is preferably a substrate having excellent transparency and having mechanical strength in response to the application. Here, "excellent transparency" means that the visible light transmittance is more than 鄕 in the thickness of the use state (measured to JISR3106). For example: 胄 molecular film, polymer plate, glass plate. = The conductive layer preferably has at least an electromagnetic wave shielding function. The reason is that the display device or the like, in the principle of its structure or operation, will generate a heart wave and/or a near-infrared ray, and it is necessary to shield the case. Pass: In order to shield the electromagnetic wave, most of the display surface is covered with the ancient guide "raw conductive material. This is because the above conductive material will absorb electromagnetic waves, and the electromagnetic wave shielding ability can be dissipated as a charge in the form of 200827408. It is suitable for the optical filter of the present invention, preferably a conductive bank: in order to make this transparent state, the specific example of the conductive layer is as follows: in the visible light king oxide semiconductor film, the transparent conductivity of the multilayer film = gold = film j. The metal-coated material on the synthetic fiber is made of a metal-coated material, or a metal fiber sifter is formed, and a metal coating is applied. The conductive layer is shielded by electromagnetic waves for each of the =::: The conductivity is based on the specification or the radiation intensity released from the electro-optical display. The case of the more stringent electromagnetic wave gauge required by the temple is as follows. In particular, it is preferably at least 1 Ω/□. The near-infrared rays emitted by the 敝攸 敝攸 敝攸 颁 颁 , , , , , 最好 最好 最好 最好 最好 最好 最好 10 10 10 10 10 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学Such as· A multilayer transparent conductive film layer or a conductive mesh layer laminated with a metal film and a transparent high-intensity film. The cost of the multilayer transparent conductive film layer is lower than that of the conductive screen, and the metal constituting the metal film is utilized. The free electrons will reflect the 4-inch nature of the near-infrared springs, and will combine the features of the electromagnetic wave shielding function and the near-infrared occlusion function. On the other hand, the conductivity_mesh layer will not have: the optical characteristics are significantly reduced and can have a high Conductivity: When the demand is high::, the function of the shielding function, because it can meet the strict electromagnetic wave specifications such as the above-mentioned people's livelihood, it is a suitable material. Function, specifically: hard coating, 9 200827408 anti-pressure, anti-glare anti-fouling, gas barrier, near-infrared occlusion, UV opacity, screen flattening, etc. It is known that at least this T to v is a kind of 'not limited to this. It is better to use the UV blocking performance #配在土& 寸取疋^ This layer is placed close to The human side. The functional transparent layer and the method of formation are not particularly limited, and all known techniques can be used. Further, it is also possible to open/form two or more layers, or a single layer can have a plurality of functions.

The electropolymerized display panel having the light sheet obtained according to the above, even if it does not deteriorate the performance for a long time, can be released from the light source (4) without removing the luminescence, and thus the color purity of the present invention will be improved. In addition, since the optical filter of the present invention can also remove unnecessary light generated by external light, it is possible to provide a display with improved brightness contrast. The invention is further illustrated by the following examples. EXAMPLES Example 1-1: Synthesis of Compound 1 200827408

As shown in the figure above, 100 g of Intermediate A, 132 ml of pyridine, and 87 g of Intermediate B were placed in a reaction flask, and the temperature was raised to an internal temperature coffee. c. Then slowly add milliliters of diethyl orthoformate (added in ten minutes), heat up to 1151 after the completion of the dropwise addition, and continue stirring for 1 hour. Add 350 ml of water while hot, cool to 2 (rc, filter. Place the solid in 400 ml of ethyl acetate and heat to reflux for 3 min. Cool to 2 〇c>c, filter, wash the filter cake with 400 ml of decyl alcohol Finally, it is dried by 15 (rc hot air. It gives 72 g of blue-green solid. The physical property values of compound 1 are as follows. · The maximum absorption wavelength measured in chloroform solvent is 585 nm, and the absorption coefficient phase plate in 585 nm The absorption coefficient ratio of η ^ Wang Ding at 525 nm is 2.2. 11 200827408 Example 1-2: Optical properties of the filter Dispersed and dissolved in a solvent of ethyl acetate/toluene (50:50 by weight) Compound No. 1, the pigment concentration in the resin is 1 〇〇〇 (wt) p_ state when dry, to obtain a pigment-doped diluent for acrylic adhesives. Secondly, an acrylic adhesive [butyl acrylate and acrylic acid) Copolymer], mixed with a pigment-doped diluent (weight ratio 8 〇: 2 〇), and continuously coated on the polyethylene terephthalate film and the oxime release layer by a bar coater method Release thin • The release layer of the film is dry and then another thin release The film is attached to the coated surface to form a pigmented adhesive sheet having a release film having different release forces and having a thickness of 25 //m. The release film of one side of the prepared adhesive sheet is peeled off. And attached to the moon propylene fee tree 曰 (thickness 2 mm), and then peel off the other side of the release film, and attached to the ultraviolet ray blocking film [Ηβ film, thickness 75 from the correction of the optical filter. Related to the obtained optical filter, the spectrophotometer is used to measure the light transmittance in the amount of 300 mn~800 nm. The light transmittance in 585 nm is compared with that in 525 nm. The ratio of the transmittance was 6 fingers. Example 1 - 3: Evaluation of Light Resistance of Filters Optical filters and optical sheets obtained from the compounds were subjected to environmental acceleration test using simulated solar irradiation using a solar simulator. The ultraviolet ray blocking film surface of the prepared optical filter is irradiated with light rays of 380 nm to 780 nm at a temperature of 30 ± 1 (rc, humidity 5 〇 ± 2 〇%, 5 〇 mW/cm 2 for 25 〇 hours). As a result, the absorption retention rate was 92%. Example 1 - 4: Evaluation of durability of the filter 12 200827408 The optical filter prepared by the compound 1 is subjected to an accelerated test of high temperature, high temperature and high humidity, and simulated sunlight. In this test, an 80 °C thermostat [DN-61], 60 °C / 90 is used. % RH constant temperature and humidity chamber (FX2200), and solar simulator. The test of simulated sunlight is applied to the ultraviolet shielding film surface of the above optical filter at a temperature of 3 〇 ° ° C, a vibration of 50 20 / From 6 to the inside, the visible light of 380 nm to 780 nm is irradiated by mW/cm2 at the same time.

The above optical filter was kept under ambient conditions for 5 hours and 1000 hours. The optical filter 'light transmittance after 5 hours and (10) hours was measured by a spectrophotometer. From the above formula (2), the absorption retention rate at the maximum absorption wavelength after each environmental acceleration test was obtained. The results are shown in Table 1 below.

It is also possible to simulate and test the solar light. As can be seen from the above, it is possible to provide long-term and excellent results by improving the contrast and color reproduction range of the plasma display device in the bright place. [Industrial Applicability] Winter The filter of the present invention is suitable for selectively absorbing 560 to 630 nm of a cyanine dye containing excellent durability contained in external light in a plasma display, and thus is long-term. Especially because it does not require light, and there is still no performance. 13 200827408 Deterioration occurs. Therefore, the utilization value of the industry is quite high. [Simple diagram description] None [Main component symbol description] None

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Claims (1)

200827408 X. Patent application scope: 1. A filter characterized in that it contains at least one cyanine pigment as described in the following formula 1: Wherein, 1 and R2 may be the same or respectively an alkyl group having 1 to 4 carbon atoms. 2. A plasma display comprising a filter having the first item of the patent application. XI. Schema: None 15