JPH112711A - Manufacture of color filter, color filter and display device, and device equipped with the display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the manufacture of the color filter which can position an ink jet head precisely about a color filter substrate. SOLUTION: This method includes a jetting process for jetting ink out of ink jet nozzles corresponding to alignment marks 92 formed on a substrate 1 among ink jet nozzles of an ink jet head to the substrate, a measuring process for measuring the distances between the alignment marks 92 on the substrate and ink dots formed of the ink jetted corresponding to the alignment marks one by one, a positioning process for positioning the ink jet head about the substrate 1 according to data on the measured distances between the alignment marks and ink dots, and a coloring process for coloring the substrate 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color filter manufacturing method, a color filter, and a display for manufacturing a color filter by discharging ink toward a substrate by an ink jet head and coloring each pixel of the color filter. The present invention relates to a device and a device including the display device.

[0002]

2. Description of the Related Art A color filter used for a liquid crystal display or a camera is a filter in which pixels colored in different colors are arranged in a mosaic or stripe shape. Pixels are most commonly colored in the three primary colors of red (R), green (G), and blue (B) light. Each pixel is
Each of R, G, and B is formed of at least one color, and is generally partitioned by a light-shielding grid (black matrix) having a desired width in order to increase display contrast.

In a method of manufacturing a color filter using an ink jet head, in consideration of throughput and the like, walls are provided at boundaries between pixels of an ink receiving layer formed on a filter substrate to prevent color mixing between pixels. ing. Or,
When the ink receiving layer is not provided, pixels containing three colors of ink-containing resin are simultaneously discharged onto the substrate to form pixels. However, in the case of simultaneously ejecting three colors of ink using a long inkjet head having a large number of nozzles, the adjacent pixels are colored unless the inkjet head is accurately positioned with respect to the color filter substrate. The mixed ink may enter over the wall of the color mixture prevention layer and mix with each other (color mixture), thereby deteriorating the characteristics as a color filter. Therefore, there arises a problem that a high-definition color filter cannot be obtained or the yield decreases.

[0004]

Conventionally, when a color filter is manufactured by an ink-jet method, in order to align the color filter substrate with the ink-jet head, the color filter is actually colored to reduce the color mixture. A method of visually revising, coloring again, and confirming the color was used. According to this method, the degree of color mixing changes depending on the difference between the operators performing alignment, alignment takes time with human eyes, and there are inconveniences such as inaccuracy due to insufficient measurement points.

[0005] In addition, the color filter substrate
If the position of the head is determined only by points, there has been a problem that color mixing occurs due to the ejection direction characteristics of the inkjet head. Therefore, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a method of manufacturing a color filter capable of precisely positioning an ink jet head with respect to a color filter substrate.

It is another object of the present invention to provide a color filter and a display device manufactured by the above-described manufacturing method, and an apparatus provided with the display device.

[0007]

Means for Solving the Problems The above-mentioned problems are solved,
In order to achieve the object, a method of manufacturing a color filter according to the present invention includes ejecting ink while causing an inkjet head having a plurality of ink ejection nozzles to relatively scan with respect to a substrate to form each pixel on the substrate. A method of manufacturing a color filter by coloring, wherein, among the plurality of ink discharge nozzles, ink is discharged onto the substrate from ink discharge nozzles corresponding to each of a plurality of alignment marks formed on the substrate. A measuring step of measuring a distance between the plurality of alignment marks on the substrate and ink dots formed by ink discharged corresponding to each of the plurality of alignment marks. Based on a plurality of data of the distance between the alignment mark and the ink dot measured in the measurement step,
A positioning step of positioning the inkjet head with respect to the substrate, and a coloring step of coloring the substrate by scanning the inkjet head positioned in the positioning step relative to the substrate. I have.

In the method of manufacturing a color filter according to the present invention, in the positioning step, the position of the inkjet head with respect to the substrate is determined based on an average value of a plurality of data of the distance between the alignment mark and the ink dot. It is characterized by performing.

In the method of manufacturing a color filter according to the present invention, in the positioning step, the ink jet head may be mounted on the substrate by using a least square method from a plurality of data of the distance between the alignment mark and the ink dot. Is characterized in that the positioning of

In the method of manufacturing a color filter according to the present invention, the ink jet head is a head for discharging ink using thermal energy,
It is characterized by having a thermal energy generator for generating thermal energy given to the ink.

Further, the color filter according to the present invention comprises:
A color filter manufactured by discharging ink while causing an inkjet head having a plurality of ink discharge nozzles to scan relative to a substrate to color each pixel on the substrate, wherein the plurality of ink discharge nozzles are provided. An ejection step of ejecting ink onto the substrate from an ink ejection nozzle corresponding to each of the plurality of alignment marks formed on the substrate among the nozzles; and the plurality of alignment marks on the substrate; A measuring step of measuring a distance between ink dots formed by ink ejected corresponding to each of the alignment marks; and a plurality of distances between the alignment mark and the ink dots measured in the measuring step. A positioning step of positioning the ink jet head with respect to the substrate based on the data; It is characterized in the the positioned ink jet head is relatively scanned with respect to the substrate that is manufactured through the coloring step of coloring the substrate with degree.

Further, the color filter according to the present invention comprises:
A color filter manufactured by discharging ink while coloring an inkjet head having a plurality of ink discharge nozzles relative to a substrate to color each pixel on the substrate, and formed on the substrate. And a plurality of alignment marks formed in the vicinity of the alignment mark, and a trace of ejected ink formed near the alignment mark.

A display device according to the present invention is manufactured by discharging ink while scanning an ink jet head having a plurality of ink discharge nozzles relative to a substrate to color each pixel on the substrate. A display device provided with a color filter, wherein, among the plurality of ink ejection nozzles, ink ejection nozzles corresponding to a plurality of alignment marks formed on the substrate eject ink onto the substrate. A step of measuring a distance between the plurality of alignment marks on the substrate and ink dots formed by ink ejected corresponding to each of the plurality of alignment marks; Based on a plurality of data of the distance between the alignment mark and the ink dot measured in the measurement step, the A color filter manufactured through a positioning step of positioning the jet head, and a coloring step of coloring the substrate by relatively scanning the inkjet head positioned in the positioning step with respect to the substrate; It is characterized in that a variable light amount varying means is integrally provided.

Further, the display device according to the present invention is manufactured by discharging ink while scanning an ink jet head having a plurality of ink discharge nozzles relative to the substrate to color each pixel on the substrate. A display device comprising a color filter, a plurality of alignment marks formed on the substrate, a color filter having a trace of ink ejected formed in the vicinity of the alignment mark, a variable light amount And a light amount varying means for controlling the amount of light.

Further, in an apparatus having a display device according to the present invention, ink is ejected while an ink jet head having a plurality of ink ejection nozzles is relatively scanned with respect to a substrate to color each pixel on the substrate. A display device having a color filter manufactured by performing the method, wherein, among the plurality of ink ejection nozzles, the ink ejection nozzles corresponding to a plurality of alignment marks formed on the substrate, respectively. A discharging step of discharging ink onto the substrate, and a distance between the plurality of alignment marks on the substrate and ink dots formed by ink discharged corresponding to each of the plurality of alignment marks; Based on a plurality of data of the distance between the alignment mark and the ink dot measured in the measurement step of measuring the A color filter manufactured through a positioning step of positioning the ink jet head with respect to the substrate, and a coloring step of coloring the substrate by scanning the ink jet head positioned in the positioning step relative to the substrate; And a display device integrally provided with light amount varying means for varying the light amount, and an image signal supply means for supplying an image signal to the display device.

Further, in the apparatus provided with the display device according to the present invention, ink is ejected while an ink jet head having a plurality of ink ejection nozzles is scanned relative to the substrate to color each pixel on the substrate. A display device having a color filter manufactured by the method, comprising: a plurality of alignment marks formed on the substrate; and a trace of ejecting ink formed in the vicinity of the alignment mark. A display device integrally including a color filter and a light amount varying unit that varies a light amount;
Image signal supply means for supplying an image signal to the display device.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic diagram showing the configuration of an embodiment of a color filter manufacturing apparatus.

In FIG. 1, reference numeral 51 denotes an apparatus pedestal; 52, an XY stage disposed on the pedestal 51; 53, a color filter substrate set on the XY stage 52; Red), G (green),
B (blue) inkjet head unit, 56 is a television camera for imaging the surface of the color filter substrate 53, and 57 is a control controller for controlling the operation of the manufacturing apparatus 90.

The apparatus shown in FIG. 1 uses the respective R, G, and B ink ejection heads to scan the substrate 1 in the vertical direction, and skips in the horizontal direction to create a color filter.

FIG. 2 is a configuration diagram of a control controller of the color filter manufacturing apparatus 90. 59 is a teaching pendant which is an input / output means of the controller 58;
Reference numeral denotes a display unit for displaying information such as the progress of manufacturing and whether or not the head is abnormal. Reference numeral 60 denotes an operation unit (keyboard) for instructing the operation of the color filter manufacturing apparatus 90 and the like.

Reference numeral 58 denotes a controller for controlling the overall operation of the color filter manufacturing apparatus 90; 65, an interface for transferring data to and from the teaching pendant 59; 66, a CPU for controlling the color filter manufacturing apparatus 90 and performing image processing and the like. And 67, a ROM storing a control program for operating the CPU 66;
Is a RAM for storing abnormality information and the like, 70 is an ejection control unit for controlling ink ejection, 71 is a color filter manufacturing apparatus 9
A stage controller 90 for controlling the operation of the XY stage 52 of 0 is connected to the controller 58, and shows a color filter manufacturing apparatus that operates according to the instruction.

FIG. 3 is a view showing the structure of an ink jet head 55a used in the above-described color filter manufacturing apparatus 90. In FIG. 1, three ink jet heads are provided corresponding to the three colors of R, G, and B. However, since these three heads have the same structure, respectively, FIG. The structure of one of the heads is shown as a representative.

In FIG. 3, the ink jet head 55
“a” is schematically composed of a heater board 104 as a substrate on which a plurality of heaters 102 for heating ink are formed, and a top plate 106 overlaid on the heater board 104. The top plate 106 has a plurality of discharge ports 108.
A tunnel-like liquid passage 110 communicating with the discharge port 108 is formed behind the discharge port 108. Each liquid channel 110 is separated from an adjacent liquid channel by a partition 112. Each fluid channel 110 has one
The two ink liquid chambers 114 are connected in common, and ink is supplied to the ink liquid chambers 114 through ink supply ports 116, and the ink is supplied from the ink liquid chambers 114 to the respective liquid paths 110.

The heater board 104 and the top plate 106
Each heater 102 is positioned so as to come to a position corresponding to each liquid path 110, and assembled in a state as shown in FIG.
Although only two heaters 102 are shown in FIG. 3, one heater 102 is
Are arranged one by one. Then, when a predetermined drive pulse is supplied to the heater 102 in an assembled state as shown in FIG. 3, the ink on the heater 102 boils to form bubbles, and the ink expands from the ejection openings 108 by volume expansion of the bubbles. Extruded and discharged. Therefore, it is possible to control the driving pulse applied to the heater 102, for example, by controlling the magnitude of the electric power, to adjust the size of the bubble,
The volume of the ink ejected from the ejection port can be freely controlled.

FIG. 4 is a diagram showing an example of a manufacturing process of a color filter.

In the color filter of the present invention, a light-transmitting substrate is preferable as the substrate, and a glass substrate is generally used. However, any material having necessary characteristics such as transparency and mechanical strength as a color filter for liquid crystal is used. However, it is not limited to a glass substrate. FIG. 4A shows the light transmitting section 7.
And a glass substrate 1 provided with a black matrix 2 which is a light shielding portion. First, a resin composition curable by light irradiation or light irradiation and heating and having an ink receiving property is applied to the substrate 1 on which the black matrix 2 is formed, and prebaking is performed as necessary to form the resin layer 3. Form (Fig. 4
(B)). For forming the resin layer 3, a coating method such as spin coating, roll coating, bar coating, spray coating, or dip coating can be used, and is not particularly limited.

Next, a portion of the resin layer, which is shielded from light by the black matrix 2, is subjected to pattern exposure using a photomask 4 in advance, thereby curing a part of the resin layer and absorbing no ink 5 (non-colored portion). 4) (FIG. 4)
(C)), and then R,
Each color of G and B is colored at a time (FIG. 4D), and the ink is dried if necessary.

As the photomask 4 used at the time of pattern exposure, a photomask having an opening for curing a light-shielding portion by a black matrix is used. At this time, it is necessary to apply a relatively large amount of ink in order to prevent color loss of the colorant in a portion in contact with the black matrix. Therefore, it is preferable to use a mask having an opening smaller than the (light-shielding) width of the black matrix.

As the ink used for coloring, both dye-based and pigment-based inks can be used, and both liquid inks and solid inks can be used.

As the curable resin composition used in the present invention, any resin composition can be used as long as it has ink receptivity and can be cured by light irradiation or at least one of light irradiation and heating. Yes, as a resin, for example, acrylic resin, epoxy resin, silicone resin, hydroxypropyl cellulose, hydroxyethyl cellulose,
Examples include cellulose derivatives such as methylcellulose and carboxymethylcellulose, and modified products thereof.

It is also possible to use a photoinitiator (crosslinking agent) to cause a crosslinking reaction of these resins by light or light and heat. As a photoinitiator, dichromate,
Bisazide compounds, radical initiators, cationic initiators, anionic initiators and the like can be used. These photoinitiators can be used as a mixture or in combination with other sensitizers. Further, a photoacid generator such as an onium salt can be used in combination as a crosslinking agent. Note that heat treatment may be performed after light irradiation in order to further promote the crosslinking reaction.

The resin layer containing these compositions is extremely excellent in heat resistance, water resistance and the like, and can sufficiently withstand a high temperature or a washing step in a later step.

As the ink jet system used in the present invention, a bubble jet type using an electrothermal converter or a piezo jet type using a piezoelectric element can be used as an energy generating element. It can be set arbitrarily.

Although this embodiment shows an example in which a black matrix is formed on a substrate, the black matrix is formed on a resin layer after forming a curable resin composition layer or after coloring. However, there is no particular problem, and the form is not limited to this example. Also,
As a forming method thereof, it is preferable to form a metal thin film on a substrate by sputtering or vapor deposition and pattern it by a photolithography process, but it is not limited thereto.

Next, only the light irradiation, only the heat treatment, or the light irradiation and the heat treatment are performed to cure the curable resin composition (FIG. 4E), and a protective layer 8 is formed as needed (FIG. 4E).
(F). In the drawing, hν indicates the intensity of light, and in the case of heat treatment, heat is applied instead of the light of hν. The protective layer 8 can be formed using a second resin composition of a photo-curing type, a thermo-setting type or a combination of light and heat, or can be formed by vapor deposition or sputtering using an inorganic material. Any material can be used as long as it has the transparency in this case and can sufficiently withstand the subsequent ITO forming process, alignment film forming process, and the like.

FIG. 5 is a sectional view showing the basic structure of a color liquid crystal display device 30 incorporating the above color filters.

11 is a polarizing plate, 1 is a transparent substrate such as glass, 2 is a black matrix, 3 is a resin composition layer, 8
Is a protective layer, 16 is a common electrode, 17 is an alignment film, 18 is a liquid crystal compound, 19 is an alignment film, 20 is a pixel electrode, 21 is a glass substrate, 22 is a polarizing plate, and 23 is backlight. 5
Reference numeral 3 denotes the color filter described above, and reference numeral 24 denotes a counter substrate.

The color liquid crystal display device 30 includes a color filter 53 and an opposing substrate 24 in which the liquid crystal compound 18 is sealed.
Transparent pixel electrodes 20 are formed in a matrix inside 1. The color filter 53 is arranged so that R, G, and B pixels are arranged at the position of the pixel electrode 20.

Further, an alignment film 17 is formed on the inside of both substrates, and by subjecting it to a rubbing treatment, liquid crystal molecules can be aligned in a certain direction. Polarizing plates 11 and 22 are adhered to the outside of each substrate, and a liquid crystal compound is filled in the gap between these substrates. As the backlight, a combination of a fluorescent lamp and a scattering plate (both are not shown) is generally used, and the liquid crystal compound 18 functions as an optical shutter for changing the transmittance of the backlight 23. Display.

An example in which such a liquid crystal display device is applied to an information processing device will be described with reference to FIGS.

FIG. 6 is a block diagram showing a schematic configuration when the above-mentioned liquid crystal display device is applied to an information processing device having functions as a word processor, a personal computer, a facsimile device, and a copying device.

In the figure, reference numeral 1801 denotes a control unit for controlling the entire apparatus, which includes a CPU such as a microprocessor and various I / O ports, outputs control signals and data signals to each unit, and controls signals from each unit. And control by inputting data signals. Reference numeral 1802 denotes a display unit, on which various menus, document information, and the image reader 18 are displayed.
In step 07, the read image data and the like are displayed. 18
Reference numeral 03 denotes a transparent pressure-sensitive touch panel provided on the display unit 1802. By pressing the surface of the touch panel with a finger or the like, it is possible to input items, coordinate positions, and the like on the display unit 1802.

Reference numeral 1804 denotes an FM (Frequency Modulation) sound source unit which stores music information created by a music editor or the like as digital data in a memory unit 1810 or an external storage device 1812, and reads out the FM information from the memory or the like to read the FM information.
The modulation is performed. The electric signal from the FM sound source unit 1804 is converted into an audible sound by the speaker unit 1805.
The printer unit 1806 is used as an output terminal of a word processor, a personal computer, a facsimile machine, and a copying machine.

Reference numeral 1807 denotes an image reader unit for reading and inputting the original data photoelectrically, which is provided in the original transport path and reads various originals such as facsimile originals and copy originals.

Reference numeral 1808 denotes facsimile transmission of the original data read by the image reader unit 1807, and facsimile (F) for receiving and decoding the transmitted facsimile signal.
AX), and has an external interface function. Reference numeral 1809 denotes a telephone unit having various telephone functions such as a normal telephone function and an answering machine function.

A ROM 1810 stores a system program, a manager program, other application programs, character fonts, a dictionary, and the like, an application program and document information loaded from an external storage device 1812, and a memory including a video RAM and the like. Department.

Reference numeral 1811 denotes a keyboard for inputting document information and various commands.

Reference numeral 1812 denotes an external storage device using a storage medium such as a floppy disk or a hard disk. The external storage device 1812 stores document information, music or voice information,
A user application program and the like are stored.

FIG. 7 is a schematic overview of the information processing apparatus shown in FIG.

In the figure, reference numeral 1901 denotes a flat panel display using the above-mentioned liquid crystal display device, which displays various menus, graphic information, document information and the like. By pressing the surface of the touch panel 1803 with a finger or the like on the display 1901, coordinate input and item designation input can be performed. A handset 1902 is used when the device functions as a telephone. Keyboard 190
3 is detachably connected to the main body via a cord,
Various document functions and various data inputs can be performed. The keyboard 1903 has various function keys 1904.
Etc. are provided. 1905 is an external storage device 1812
This is the slot for the floppy disk.

Reference numeral 1906 denotes a sheet placing portion on which a document to be read by the image reader portion 1807 is placed. The read document is discharged from the rear of the apparatus. In the case of facsimile reception or the like, printing is performed by the inkjet printer 1907.

When the information processing apparatus functions as a personal computer or a word processor, various information input from the keyboard section 1811 is processed by the control section 1801 according to a predetermined program, and the information is processed by the printer section 1.
The image is output to an image 806.

When functioning as a receiver of a facsimile apparatus, facsimile information input from a facsimile transmission / reception unit 1808 via a communication line is received and processed by a control unit 1801 according to a predetermined program.
Is output as a received image.

When functioning as a copier, a document is read by an image reader unit 1807, and the read document data is sent to a printer unit 18 via a control unit 1801.
06 is output as a copy image. When functioning as a facsimile receiver, the image reader unit 1
The original data read by 807 is transmitted to control unit 180.
After transmission processing according to a predetermined program by 1
The data is transmitted to the communication line via the facsimile transmission / reception unit 1808.

As shown in FIG. 8, the information processing apparatus described above may be of an integrated type in which an ink jet printer is built in the main body. In this case, portability can be further improved. In the figure, parts having the same functions as those in FIG. 7 are denoted by the corresponding reference numerals.

FIG. 9 is a view showing an example of a color filter manufacturing process and a configuration of a color filter according to the present invention.

FIG. 9 (a) shows an ink receiving type substrate, which has a black matrix 2 which is a light-shielding portion on the substrate 1 as described above, and further has a resin having ink receiving properties thereon. The resin layer 3 coated with the (composition) is formed.

FIG. 9 (b) shows a substrate 1 'of the direct hit type, which is made of a thermosetting or photocurable ink or a resin having both thermosetting and photocuring properties. , BM substrate.

Next, the substrate 1 or the substrate 1 'is set in the color filter manufacturing apparatus 90, and the relative positions of the R, G, and B heads are adjusted so as to have a distance corresponding to the pixel pitch of the color filter substrate to be colored. The head need not necessarily be perpendicular to the drawing direction as shown in FIG. 11, but may be adjusted to the pixel pitch of the color filter substrate by adjusting the angle.

Thereafter, alignment of the substrate and the head position, which is a characteristic part of the present invention, is performed.

As shown in FIG. 10, at least two or more reference marks (alignment marks) 9 for position detection are formed on the color filter substrate 1 for forming the color filters.
2 are formed. Although the reference mark 92 may be located at any position on the color filter substrate 1, at least two areas that can be colored by one scan of the inkjet head are provided.
It is desirable to cover in more than one point. Furthermore, it is more preferable that the pixel is formed every other pixel row of the same color pixel row above the colored portion of the colored pixel row.

The reference mark 92 does not need to be at a position on the blue (B) pixel row as shown in FIG. 11, but at a position where the pixel pitch of the color filter substrate 1 is related to the ink dot pitch. I just need.

The reference mark 92 may be any mark whose center position is derived by image processing.
It need not be a cross as indicated by zero.

Next, the ink is injected into a desired position at a desired position on the substrate shown in FIGS. 9A and 9B in a desired amount.

As described above, various methods can be used to implement the present invention by the ink-jet method. However, whichever method is used, two or more position detection reference marks provided on the color filter substrate are used. The method for determining the relative position of the ink jet head and the color filter substrate by using the method falls within the scope of the present invention.

Hereinafter, specific embodiments will be described.

(First Embodiment) 7059 manufactured by Corning Incorporated
The glass substrate was washed by a conventional method, and a black matrix was formed thereon. On top of this, hydroxypropylcellulose (HP manufactured by Nippon Soda)
CH) and 5 g of a methylolated melamine derivative (Sumitec M-3, manufactured by Sumitomo Chemical Co., Ltd.), and spin-coated with a water-based ink-absorbing resin composition so as to have a film thickness of 1 μm, and 50 ° C. for 10 minutes. Pre-baking, exposure,
Post baking was performed at 120 ° C. for 90 seconds.

Next, using an ink-jet manufacturing apparatus as shown in FIG. 1 in which the relative positions between the RGB heads are adjusted in advance, every other pixel above the blue (B) colored portion as shown in FIG. A blue (B) dot pattern was formed on the color filter substrate 1 having the reference mark 92 next to the reference mark 92 of the color filter substrate 1 by using a nozzle of an ink jet head at a position as shown in FIG. . Next, the reference mark 92 and the dot pattern of B were detected using the television camera 56 on the manufacturing apparatus, and the XY stage 52 of the manufacturing apparatus 90 was moved in the direction in which the pixel rows were arranged, so that the respective center positions were measured alternately. . The calculation of the center position was performed using an image processing unit incorporated in the controller 58. The center positions of the reference mark 92 and the dot pattern of B are measured 60 times (120 points in total), and the center distances l1, l2, l3,... Between the reference mark 92 and the dot pattern of B in each measurement are calculated. Then, the average distance L1 was derived. Next, the average distance L1 is the standard value D of the distance between pixels of the color filter substrate 1 (see FIG. 10).
The starting position of coloring with respect to the substrate 1 was adjusted so as to be as follows.

After the adjustment, the color filter pattern was colored. Microscopic observation revealed no color mixture. Thereafter, drying of the ink and drying of the resin layer 3 were performed to prepare a color filter.

(Second Embodiment) In the adjustment of the start position of coloring in the first embodiment, an optimum value is derived from the distance between the center of the reference mark 92 and the center of the dot pattern of B by using the least squares method. When the color of the color filter pattern was adjusted by adjusting the position of the head, a color filter having no color mixture could be produced.

(Third Embodiment) In deriving the adjustment amount of the coloring start position in the first embodiment, the distance between the centers of the reference mark 92 and the dot pattern of the B was measured over a plurality of substrates. When a color filter pattern was drawn using the adjustment amounts derived in this way, a color filter free of color mixture could be created.

(Fourth Embodiment) Color filter substrates manufactured under the same conditions have the same substrate characteristics. Therefore, by applying the alignment method of the present invention to only the first one of a plurality of color filter substrates manufactured under the same conditions, it is possible to create a color filter without color mixture for all the substrates. Was completed.

The present invention includes a means (for example, an electrothermal converter or a laser beam) for generating thermal energy as energy used for performing ink ejection, particularly in an ink jet recording system. The printing apparatus of the type that causes a change in the state of the ink has been described.
High definition can be achieved.

The typical configuration and principle are described in, for example, US Pat. Nos. 4,723,129 and 4,740.
It is preferable to use the basic principle disclosed in the specification of Japanese Patent No. 796. This method can be applied to both the so-called on-demand type and continuous type. In particular, in the case of the on-demand type, liquid (ink)
By applying at least one drive signal corresponding to the recorded information and providing a rapid temperature rise exceeding the film boiling to the electrothermal transducer arranged corresponding to the sheet or the liquid path holding the Since thermal energy is generated in the electrothermal transducer and film boiling occurs on the heat-acting surface of the recording head, bubbles in the liquid (ink) corresponding to this drive signal on a one-to-one basis can be formed. It is valid. By discharging the liquid (ink) through the discharge opening by the growth and contraction of the bubble, at least one droplet is formed. When the drive signal is formed into a pulse shape, the growth and shrinkage of the bubble are performed immediately and appropriately, so that the ejection of the liquid (ink) having particularly excellent responsiveness can be achieved, which is more preferable.

As the pulse-shaped drive signal, those described in US Pat. Nos. 4,463,359 and 4,345,262 are suitable. Further, if the conditions described in US Pat. No. 4,313,124 relating to the temperature rise rate of the heat acting surface are adopted, more excellent recording can be performed.

As the configuration of the recording head, in addition to the combination configuration (a linear liquid flow path or a right-angled liquid flow path) of a discharge port, a liquid path, and an electrothermal converter as disclosed in the above-mentioned respective specifications, A configuration using U.S. Pat. No. 4,558,333 or U.S. Pat. No. 4,459,600, which discloses a configuration in which a heat acting surface is arranged in a bent region, is also included in the present invention. In addition, for multiple electrothermal transducers,
JP-A-59-123670 which discloses a configuration in which a common slot is used as a discharge part of an electrothermal transducer, and JP-A-59-123670 which discloses a configuration in which an opening for absorbing a pressure wave of thermal energy corresponds to a discharge part. A configuration based on 138461 may be adopted.

Further, as a full-line type recording head having a length corresponding to the width of the maximum recording medium that can be recorded by the recording apparatus, the length is determined by a combination of a plurality of recording heads as disclosed in the above specification. This may be either a configuration satisfying the above requirements or a configuration as a single recording head formed integrally.

In addition, the print head is replaceable with a print head of a replaceable chip type, which can be electrically connected to the main body of the apparatus or supplied with ink from the main body of the apparatus, or is integrated with the print head itself. Alternatively, a cartridge type recording head provided with an ink tank may be used.

It is preferable to add recovery means for the recording head, preliminary auxiliary means, and the like provided as components of the recording apparatus of the present invention since the effects of the present invention can be further stabilized. . If these are specifically mentioned, capping means for the recording head, cleaning means, pressurizing or suction means, preheating means using an electrothermal transducer or another heating element or a combination thereof, and printing Performing a preliminary ejection mode for performing another ejection is also effective for performing stable printing.

In the embodiments of the present invention described above, the ink is described as a liquid. However, an ink that solidifies at room temperature or lower, or an ink that softens or liquefies at room temperature may be used. It is only necessary that the ink be in a liquid state when the recording signal is applied.

In addition, in order to positively prevent temperature rise due to thermal energy as energy for changing the state of the ink from the solid state to the liquid state, the temperature can be positively prevented.
Alternatively, in order to prevent evaporation of the ink, an ink which solidifies in a standing state and liquefies by heating may be used. In any case, the application of heat energy causes the ink to be liquefied by the application of the heat energy recording signal and the liquid ink to be ejected, or by the time the ink reaches the recording medium, the solidification of the ink already begun. The present invention is also applicable to a case where an ink having a property of liquefying for the first time is used. In such a case, as described in JP-A-54-56847 or JP-A-60-71260, the ink is held in a liquid state or a solid state in the concave portion or through hole of the porous sheet. It is good also as a form which opposes an electrothermal transducer. In the present invention, the most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

[0083]

As described above, according to the present invention,
By positioning the inkjet head with respect to the color filter substrate with reference to a plurality of alignment marks on the color filter substrate, it is possible to precisely align the inkjet head.

As a result, color mixture between pixels can be eliminated, and the yield can be increased.

Further, by performing the above-described alignment on a plurality of color filter substrates, it is possible to reduce the influence of the color misregistration of the ink dots due to the difference between the substrates and to eliminate the color mixture between pixels.

Thus, the yield can be improved and an inexpensive color filter can be manufactured.

[0087]

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration of an embodiment of a color filter manufacturing apparatus.

FIG. 2 is a diagram illustrating a configuration of a control unit that controls the operation of the color filter manufacturing apparatus.

FIG. 3 is a diagram illustrating a structure of an ink jet head used in a color filter manufacturing apparatus.

FIG. 4 is a diagram showing a manufacturing process of a color filter.

FIG. 5 is a cross-sectional view illustrating a basic configuration of a color liquid crystal display device incorporating a color filter according to one embodiment.

FIG. 6 is a diagram illustrating an information processing apparatus in which a liquid crystal display device is used.

FIG. 7 is a diagram illustrating an information processing apparatus in which a liquid crystal display device is used.

FIG. 8 is a diagram illustrating an information processing apparatus in which a liquid crystal display device is used.

FIG. 9 is a diagram showing a manufacturing process of a color filter.

FIG. 10 is a view showing an alignment mark on a color filter substrate.

FIG. 11 is a diagram illustrating a state in which ink dots are formed next to an alignment mark.

[Explanation of symbols]

 52 XY stage 53 Glass substrate 55 Inkjet head unit 56 TV camera 58 Control controller 59 Teaching pendant 60 Keyboard 90 Color filter manufacturing device

Claims (10)

[Claims] 1. A method of manufacturing a color filter by discharging ink while causing an inkjet head having a plurality of ink discharge nozzles to scan relative to a substrate and coloring each pixel on the substrate. An ejection step of ejecting ink onto the substrate from an ink ejection nozzle corresponding to each of a plurality of alignment marks formed on the substrate, among the plurality of ink ejection nozzles; and the plurality of alignments on the substrate. A measuring step of measuring a distance between a mark and an ink dot formed by ink ejected corresponding to each of the plurality of alignment marks; and an alignment mark and an ink dot measured in the measuring step. Positioning for positioning the ink jet head with respect to the substrate based on a plurality of data of distances between A method for producing a color filter, comprising: a step of coloring the substrate by scanning the inkjet head positioned in the positioning step relative to the substrate. 2. The method according to claim 1, wherein in the positioning step, the inkjet head is positioned with respect to the substrate based on an average value of a plurality of data of a distance between the alignment mark and the ink dot. A method for producing the color filter according to the above. 3. In the positioning step, the inkjet head is positioned with respect to the substrate by using a least square method from a plurality of data of the distance between the alignment mark and the ink dot. 2. The method for producing a color filter according to 1. 4. The ink-jet head according to claim 1, wherein the ink-jet head is a head that uses thermal energy to eject ink, and includes a thermal energy generator for generating thermal energy to be applied to the ink. A method for producing the color filter according to the above. 5. A color filter manufactured by discharging ink while causing an inkjet head having a plurality of ink discharge nozzles to scan relative to a substrate to color each pixel on the substrate, An ejection step of ejecting ink onto the substrate from an ink ejection nozzle corresponding to each of the plurality of alignment marks formed on the substrate, among the plurality of ink ejection nozzles, and the plurality of alignment marks on the substrate When,
A measuring step of measuring a distance between ink dots formed by ink ejected corresponding to each of the plurality of alignment marks, and a distance between the alignment mark and the ink dots measured in the measuring step A positioning step of positioning the inkjet head with respect to the substrate based on the plurality of data, and a coloring step of coloring the substrate by relatively scanning the inkjet head positioned in the positioning step with respect to the substrate And a color filter manufactured through the following. 6. A color filter manufactured by discharging ink while causing an inkjet head having a plurality of ink discharge nozzles to scan relative to a substrate and coloring each pixel on the substrate, A plurality of alignment marks formed on the substrate,
A mark formed by ejecting ink formed in the vicinity of the alignment mark. 7. A display device including a color filter manufactured by discharging ink while causing an inkjet head having a plurality of ink discharge nozzles to scan relative to a substrate to color each pixel on the substrate. An ejection step of ejecting ink onto the substrate from ink ejection nozzles corresponding to a plurality of alignment marks formed on the substrate, among the plurality of ink ejection nozzles, Multiple alignment marks,
A measuring step of measuring a distance between ink dots formed by ink ejected corresponding to each of the plurality of alignment marks, and a distance between the alignment mark and the ink dots measured in the measuring step A positioning step of positioning the inkjet head with respect to the substrate based on the plurality of data, and a coloring step of coloring the substrate by relatively scanning the inkjet head positioned in the positioning step with respect to the substrate And a light quantity varying means for varying the light quantity. 8. A display device including a color filter manufactured by discharging ink while causing an inkjet head having a plurality of ink discharge nozzles to scan relative to a substrate to color each pixel on the substrate. A plurality of alignment marks formed on the substrate;
A display device, comprising: a color filter having a trace of ejected ink formed in the vicinity of the alignment mark; and a light amount varying means for varying a light amount. 9. A display device having a color filter manufactured by discharging ink while causing an inkjet head having a plurality of ink discharge nozzles to scan relative to a substrate to color each pixel on the substrate. A discharge step of discharging ink onto the substrate from ink discharge nozzles corresponding to a plurality of alignment marks formed on the substrate, among the plurality of ink discharge nozzles, The plurality of alignment marks on a substrate,
A measuring step of measuring a distance between ink dots formed by ink ejected corresponding to each of the plurality of alignment marks, and a distance between the alignment mark and the ink dots measured in the measuring step A positioning step of positioning the inkjet head with respect to the substrate based on the plurality of data, and a coloring step of coloring the substrate by relatively scanning the inkjet head positioned in the positioning step with respect to the substrate A display device integrally including a color filter manufactured through the steps described above, and a light amount varying unit that varies a light amount, and an image signal supply unit that supplies an image signal to the display device. A device with a device. 10. A display device having a color filter manufactured by discharging ink while causing an inkjet head having a plurality of ink discharge nozzles to scan relative to a substrate to color each pixel on the substrate. A plurality of alignment marks formed on the substrate,
A display device integrally including a color filter having a trace of ejected ink formed near the alignment mark, and a light amount varying unit for varying a light amount, and an image signal supply for supplying an image signal to the display device And a display device.