JP2003240939A - Color filter and instrument mounted with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color filter having a optical performance of high color purity in both a reflecting function and a transmitting function, and various display devices using the color filter. <P>SOLUTION: The color filter is so constituted that a colorless transparent resin 2 is formed on a substrate 1 in a necessary shape and a color resin 4 is formed as an upper layer thereof. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color filter of various display devices having a reflection function and a transmission function at the same time, and a device equipped with the color filter.

[0002]

2. Description of the Related Art Conventionally, a color filter has been manufactured by using a color resin having a chromaticity value and a brightness that fall between the reflection function or the transmission function or the reflection function and the transmission function.

[0003]

This has the following drawbacks. (1) In the case of a color filter that emphasizes the display quality of the reflection function, when viewing the display with the transmission function, the range of color reproducibility determined from the chromaticity value is narrow, resulting in bright but pale colors, resulting in display quality. It was a bad display device. (2) In the case of a color filter that emphasizes the display quality of the transmissive function, the range of color reproducibility determined from the chromaticity value becomes wide during the reflective function, but it becomes very dark and the display device has poor visibility. Was there. (3) In the case of a color filter having a chromaticity value and brightness that fall between the reflective function and the transmissive function, the color reproducibility determined from the chromaticity value is in a sufficient range even if the brightness is satisfactory. As a result, the display device has poor display quality. The present invention has been made to eliminate these drawbacks.

[0004]

When a pixel is divided into a portion used for a reflection function and a portion used for a transmission function in a pixel, a color filter area of the reflection function portion is formed by combining a colored resin and a colorless transparent resin. The area of the color filter for the transmission function is composed of color resin only.
At this time, the color resin has a chromaticity value and brightness that are satisfactory in the transmission function. In addition, the colored resin or the colorless transparent resin has a certain shape having irregularities or a larger step.

[0005]

As a result, the color reproducibility of the transmission function becomes sufficient depending on the performance of the color resin, and the reflection function section can produce the required performance by combining with the colorless transparent resin. In addition, the necessary and sufficient irregularities and steps allow the colorless and transparent resin or the colored resin to be sufficiently fixed to a required portion.

[0006]

EXAMPLES Examples of the present invention will be described below. (1) First, a colorless transparent resin 2 (for example, PC45
2: JSR) is applied by spin coating or roll coating to a thickness of about 3 μm, and temporarily dried on a hot plate (for example, 9
After 0 degree X 180 seconds), using a mask 3 for removing the resin of an unnecessary portion by a photolithography method, after half exposure (for example, 150 mJ / cm2), development (for example, TMAH 2.38% for 60 seconds). ), And melt bake on a hot plate (for example, 150 degrees x 180 seconds)
After performing the final bake, for example, 230 degrees x 6
It is performed using a clean oven under the condition of 0 seconds. Next, in order to fix the color resin 4 in the order of R → G → B, a negative photoresist CFPR series (manufactured by Tokyo Ohka) was used. First, R (: RH1000) is applied by spin coating or roll coating to a thickness of about 1.3 μm, and the mask 5 is processed by photolithography so that the colored resin remains only in a predetermined portion. Similarly G (: GH1000)
And B (: BH1000). As a result, a cross-sectional view and a spectral characteristic of the manufactured color filter of FIG. 2 are shown in FIG.

[0007]

【The invention's effect】

By using the present invention, it is possible to provide a color filter having high cost performance in all respects and contribute to improving the performance of various display devices.

The color purity and brightness of the color filter can be freely controlled by the pattern design of the mask of the photosensitive colorless transparent resin.

Further, the color purity can be freely controlled by changing the film thickness of the color resin or the colorless transparent resin of the color filter.

Further, even in the printing method, it has become possible to freely control the color purity and brightness of the color filter by the pattern design of the printing plate and the film thickness of the color resin and the colorless transparent resin.

[Brief description of drawings]

FIG. 1 Example of manufacturing process by photolithography method

FIG. 2 is a sectional view of a color filter.

FIG. 3 is a spectral characteristic diagram of a color filter showing a usage state of the present invention.

[Explanation of symbols]

1 substrate 2 colorless transparent resin 3 masks 4-color resin 41 R (first color) 42 G (second color) 43 B (third color) 5 masks

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 2H025 AA00 AB13 AC01 AD01 CC11                       DA20 DA40                 2H042 BA02 BA15 BA20                 2H048 BA02 BA45 BA56 BB02 BB28                       BB42                 2H091 FA02Y FA15Z FA31Y FA31Z                       FB02 FC10 FD02 FD04 FD21                       FD24 GA03 LA15 LA16 LA20

Claims (10)

[Claims] 1. A color filter and a device equipped with the same, which provide a predetermined chromaticity value and brightness by a combination of a color resin and a colorless transparent resin. 2. A color filter according to claim 1, wherein a color resin and a colorless transparent resin are laminated, and a device equipped with the color filter. 3. A color filter according to claim 1, wherein the color resin and the colorless transparent resin are two-dimensionally arranged, and a device equipped with the color filter. 4. A color filter according to claim 2, wherein the colorless and transparent resin is arranged in a lower layer of the color resin, and a device equipped with the color filter. 5. A color filter according to claim 4, wherein the surface of the colorless transparent resin where necessary is uneven, and a device equipped with the color filter. 6. A color filter according to claim 2, wherein the color resin is arranged in a lower layer of the colorless transparent resin, and a device equipped with the color filter. 7. A color filter according to claim 6, wherein the surface of a required portion of the colored resin has irregularities, and a device equipped with the same. 8. A color filter according to claim 1, wherein the colorless transparent resin having a light scattering function is used, and a device equipped with the color filter. 9. A color filter manufactured by the photolithography method according to claim 1, and a device equipped with the color filter. 10. A color filter manufactured by the printing method according to claim 1, and a device equipped with the color filter.