Classifications

• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
  • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
  • C03C17/001—General methods for coating; Devices therefor
  • C03C17/002—General methods for coating; Devices therefor for flat glass, e.g. float glass
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
  • H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
  • H01J11/20—Constructional details
  • H01J11/34—Vessels, containers or parts thereof, e.g. substrates
• • G—PHYSICS
  • G02—OPTICS
  • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
  • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
  • G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
  • G02F1/33—Acousto-optical deflection devices
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
  • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B33/00—Electroluminescent light sources
  • H05B33/02—Details

Definitions

• the present invention provides a display glass having a first side (short side) dimension of 300 to 300 Omm, a second side (long side) dimension of 300 to 3000 mm, and an average plate thickness of 1.5 to 3.0 mm. Regarding the substrate. Background art
• the display glass substrate includes, for example, a plasma display panel (hereinafter abbreviated as a PDP), a field emission display (FED), a TFT liquid crystal display (TFT—LCD), and an STN liquid crystal. It is used as a glass substrate for flat panel displays (general term for flat displays) such as displays (STN-LCD), plasma-assisted liquid crystal displays (PALC), recto ports, and luminescence displays (EL).
• PDP plasma display panel
• FED field emission display
• TFT—LCD TFT liquid crystal display
• STN liquid crystal STN liquid crystal
• STN-LCD displays
• PLC plasma-assisted liquid crystal displays
• EL luminescence displays
• a required coating material is applied to the surface of the glass substrates according to the type of the display and assembled.
• a dielectric coating solution is applied to each of a front glass substrate and a rear glass substrate to form a dielectric film having a thickness of about 30 m.
• a cell is formed between the front glass substrate and the rear glass substrate with their dielectric films facing each other, and a plasma discharge is generated in the cell, whereby the phosphor layer on the inner wall of the cell is formed. It emits light to form an image.
• a float glass which is easy to enlarge the glass substrate and has excellent flatness and homogeneity is used.
• This float glass is formed into a plate shape while floating and transporting the molten glass on the molten tin. Therefore, the temperature of the molten tin and the atmosphere in the tin path, the temperature distribution, the elongation rate by the top roll, and other factors change the float glass.
• Some float glass having an average thickness of 2.8 mm, which is generally used as a glass substrate for PDP, has a difference in thickness per piece of 50 ⁇ m or more.
• the coating thickness varies due to the thickness difference, warpage, radius, etc. of the glass substrate, and as a result, the thickness of the dielectric film varies. This is one of the causes of poor insulation, poor light emission, and poor image quality. Therefore, it is required that the error of the coating thickness be within ⁇ 6 / zm.
• the discharge amount of the coating liquid is determined. It has been proposed to detect the thickness difference, warpage, and deflection of the glass substrate so that the distance between the discharge port and the glass substrate can be maintained substantially constant so that the glass substrate can be kept substantially constant.
• the present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a glass substrate for a display which can easily apply a coating material such as a dielectric necessary for a type of a display with a substantially constant thickness with high accuracy. . Disclosure of the invention
• the characteristic configuration of the display glass substrate of the present invention is as follows.
• the first characteristic configuration according to the present invention has a first side (short side) dimension of 300 to 300 mm and a second side (long side) dimension of 300 mm.
• a glass substrate for a display having a thickness of 1.5 to 3.0 mm and an average thickness of 1.5 to 3.0 mm, and a maximum thickness Tmax and a minimum thickness Tmin. Is characterized in that the difference D in the plate thickness is not more than 20 ⁇ m.
• the difference between the maximum plate thickness and the minimum plate thickness exceeds 20 ⁇ , the difference in the thickness of the coating material applied to the plate surface increases, but the difference in plate thickness becomes 20 ⁇ m. Since the following conditions are satisfied, the difference in thickness of the coating material applied to the plate surface is reduced, and it is easy to apply a coating material such as a dielectric material necessary for the type of display with a substantially constant thickness with high accuracy.
• a second characteristic configuration according to the present invention is characterized in that, in the first characteristic configuration, the thickness difference is 10 ⁇ m or less.
• the difference in thickness between the maximum and minimum plate thicknesses is 10 ⁇ ⁇ ⁇ or less, so the difference in thickness of the coating material applied to the plate surface is further reduced, and the required coating material is substantially reduced. It is easy to apply with a constant thickness with higher accuracy.
• a third characteristic configuration according to the present invention is characterized in that in the first characteristic configuration, the thickness difference is equal to or less than 10 ⁇ in a thickness measurement range extending over a unit of 10 O mm in length.
• the thickness difference between the maximum and minimum thicknesses is set to 20 ⁇ m or less, and between 100 mm length units! : Since the thickness difference is set to 10 ⁇ m or less in the thickness measurement range, the difference (amplitude) between the peak and valley of the concave It is small and easy to apply the required coating material with a substantially constant thickness with higher accuracy.
• a fourth characteristic configuration according to the present invention is characterized in that, in the third characteristic configuration, the thickness difference is 5 ⁇ or less.
• a fifth characteristic configuration according to the present invention is the third characteristic configuration, wherein the function F in each of the plate thickness measurement ranges is represented by a function F (X) of a distance X from a reference position in the measured plate thickness. It is characterized in that the sign of the differential value of (X) satisfies the relationship of being positive or negative over the entire range of the thickness measurement range.
• the function F (X) in each thickness measurement range The rate of increase of the sheet thickness calculated as the differential value of the sheet thickness is positive or negative over the entire thickness measurement range, that is, the sheet thickness monotonically increases or decreases monotonically, so unevenness is distributed on the sheet surface
• the period of the irregularities is long It can be regarded as smooth and undulating, and it is easy to apply the required coating material with a substantially constant thickness and with higher accuracy.
• a sixth characteristic configuration according to the present invention is characterized in that, in the first characteristic configuration, warpage in the thickness direction is 0.1% or less.
• the thickness difference between the maximum thickness and the minimum thickness is set to 20 ⁇ m or less, and the warpage in the thickness direction is 0.1% or less.
• the coating material can be applied while correcting the warpage without being damaged, and the required coating material can be easily applied with a substantially constant thickness with higher accuracy.
• a seventh characteristic configuration according to the present invention is characterized in that, in the sixth characteristic configuration, the warpage is equal to or less than 0.05%.
• the coating material can be applied while easily correcting the warpage, and the required coating material can be applied with a substantially constant thickness and more accurately. Easy.
• An eighth characteristic configuration according to the present invention is that the first side (short side) dimension is 300 to 300 mm, the second side (long side) dimension is 300 to 300 mm, and A display glass substrate having an average thickness of 1.5 to 3.0 mm, characterized in that an error of a measured thickness with respect to a target thickness is 10 m or less.
• the thickness difference of the coating material applied to the plate surface increases, but the error is set to 10 or less.
• the difference in thickness of the coating material applied to the plate surface can be reduced, and it is easy to apply the coating material such as a dielectric material necessary for the type of display with a substantially constant thickness with high accuracy.
• a ninth characteristic configuration according to the present invention is characterized in that, in the eighth characteristic configuration, the error is 5 m or less.
• the error in the measured plate thickness with respect to the target plate thickness is set to 5 ⁇ m or less, so that the difference in thickness of the coating material applied to the plate surface can be further reduced, and the required coating material is kept substantially constant. It is easy to apply more precisely with thickness.
• FIG. 1 is a diagram for explaining measurement data.
• FIG. 2 is a diagram illustrating a correlation between a difference in thickness of a glass substrate and a difference in thickness of a dielectric film.
• the first side is 300 to 3000 mm
• the second side is 300 to 300 Omm
• the average thickness is 1.5 to 3.0 mm.
• the dielectric coating solution contains, for example, a resin, a solvent, a glass powder, and a plasticizer.
• a resin for example, a resin, a solvent, a glass powder, and a plasticizer.
• poly heptyl methacrylate Ichito poly Bulle butyral
• polymethyl methacrylate ⁇ chestnut poly E chill meth Atari rate
• Tabineoru diethylene glycol Petit ether acetate, 2, 2, 4-trimethyl one 1, 3-solvents pentanediol monoisostearate butyrate etc.
• the measurement items 1 to 5 are listed below.
• the thickness T was measured according to the distance X from the edge (reference position) of the glass substrate, and the thickness difference D between the maximum thickness Tmax and the minimum thickness Tmin in the entire width B of the glass substrate was measured (Fig. 1). .
• the measurement was performed using a laser thickness gauge by scanning over the entire width B in a direction along any one side.
• Measurement item 2 Based on the measurement result of measurement item 1, the maximum value of the thickness difference d between the maximum thickness tmax and the minimum thickness tmin in the thickness measurement range L over an arbitrary length of 100 mm units was calculated. ( Figure 1 ) .
• Measurement item 3 Based on the measurement result of measurement item 1, the maximum value of the thickness difference d between the maximum thickness tmax and the minimum thickness tmin in the thickness measurement range L over an arbitrary length of 100 mm units was calculated. ( Figure 1 ) .
• Measurement item 3 Based on the measurement result of measurement item 1, the maximum value of the thickness difference d between the maximum thickness tmax and the minimum thickness tmin in the thickness measurement range L over an arbitrary length of 100 mm units was calculated. ( Figure 1 ) .
• Measurement item 3 Based on the measurement result of measurement item 1, the maximum value of the thickness difference d between the maximum thickness tmax and the minimum thickness tmin in the thickness measurement range L over an arbitrary length of 100 mm units was calculated. ( Figure 1 ) .
• the measured plate thickness T is expressed as a function F (X) of the distance X from the edge of the glass substrate (reference position) (Fig. 1), between arbitrary lengths of 100 mm.
• the sign of the differential value of the function F (X) was determined to be positive or negative in each of the sheet thickness measurement ranges L over the range.
• the glass substrate was cut into a rectangle of 300 mm ⁇ 300 mm, placed on a platen, and the gap between the platen and the plate surface was measured with a gap gauge.
• the warpage of the glass substrate was determined as a percentage (%) with respect to the width (300 mm) of the cut glass substrate.
• the error of the measured plate thickness T to the target plate thickness was determined.
• the table in Fig. 2 shows the measurement results for each glass substrate (sample:! ⁇ 16). That is, the thickness difference D between the maximum thickness Tmax and the minimum thickness Tmin in the entire width B of the glass substrate, and the maximum thickness tmax and the minimum thickness in the thickness measurement range L over an arbitrary length of 100 mm.
• the thickness difference between the maximum thickness Tmax and the minimum thickness Tmin in the entire width B of the glass substrate is less than 20 Aim. Since the thickness is 6 ⁇ m or less, it has been found that it is easy to apply a coating material such as a dielectric necessary for a type of display with a substantially constant thickness and with high accuracy. In particular, it was found that the glass substrates of samples 1 to 4 having a thickness difference D of 10 m or less had a dielectric film thickness difference of 4 ⁇ or less, and were easy to apply with higher precision.
• the glass substrates of Samples 1, 4, and 5 are obtained by differentiating the function F (X) in the thickness measurement range L over an arbitrary length of 100 mm units.
• the sign of the value satisfies the relationship of being positive over the entire thickness range L. Since the thickness difference between the dielectric films of the glass substrates of Samples 1, 4, and 5 was 3 / zm or less, it was found that the coating material could be easily applied with a substantially constant thickness with high accuracy. .
• a suction tape equipped with a suction port for sucking the glass surface. Place the glass substrate with the convex surface facing upward. And apply it while correcting the warpage by sucking the glass substrate through the suction port. This makes it easier to apply the coating material with a substantially constant thickness with high accuracy. In particular, when the warpage of the glass substrate is equal to or less than 0.05%, it is easy to apply with a substantially constant thickness with higher accuracy.
• a preferable warp shape is that the surface on which the dielectric film is applied is convex as described above.
• shape of the warp is S-shaped, when the warp is 0.1%, only about 50% of the glass substrate is adsorbed, but when the warp is less than 0.05%, the glass substrate is substantially omitted. 100% was adsorbed, and a difference in dielectric film thickness equivalent to that of a glass substrate without warpage was obtained.
• a glass substrate having an error of the measured plate thickness T with respect to the target plate thickness of 1 or less, particularly a glass substrate having an error of 5 ⁇ m or less, can easily apply a coating material with a substantially constant thickness with high accuracy.
• the error of the measured plate thickness T with respect to the target plate thickness is 10 ⁇ m or less, when the coating material is discharged from the discharge force and applied to the glass substrate, the discharge port and the glass substrate are The discharge amount of the coating material could be made substantially constant with almost no adjustment of the distance between the coating materials.
• the glass substrate for a display according to the present invention is preferably manufactured by controlling the following conditions. 1 Precise control of heater output installed on the roof inside Tin Pass and prevention of output fluctuation
• the glass substrate for display of the present invention is used, for example, for a glass substrate for flat panel display such as a plasma display panel, a field emission display, a TFT liquid crystal display, an STN liquid crystal display, a plasma assisted liquid crystal display, and an electroluminescence display. It is possible.

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• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• General Physics & Mathematics (AREA)
• Nonlinear Science (AREA)
• Plasma & Fusion (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Theoretical Computer Science (AREA)
• Optics & Photonics (AREA)
• Devices For Indicating Variable Information By Combining Individual Elements (AREA)
• Gas-Filled Discharge Tubes (AREA)
• Liquid Crystal (AREA)
• Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

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• 2002
  • 2002-08-28 JP JP2002248842A patent/JP3922986B2/ja not_active Expired - Fee Related
• 2003
  • 2003-05-19 WO PCT/JP2003/006255 patent/WO2004021317A1/ja not_active Ceased
  • 2003-05-19 TW TW092113485A patent/TW200403195A/zh unknown
  • 2003-05-19 KR KR1020057003088A patent/KR100933673B1/ko not_active Expired - Fee Related
  • 2003-05-19 CN CNB038203308A patent/CN100334673C/zh not_active Expired - Fee Related

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