JP3052812U - Polarizing plate with colored adhesive - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To develop a polarizing plate capable of obtaining a higher quality display than when a color polarizing plate is used. A dye or a pigment is added to an adhesive used for a transmissive / reflective / semi-transmissive polarizing plate to color the adhesive and give the polarizing plate an arbitrary hue.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a polarizing plate used for a display device of a liquid crystal display device.

[0002]

[Prior art]

 In order to obtain a monochromatic color display by a liquid crystal display, a method of combining a color polarizer and a neutral gray polarizer, using an EL for a backlight, and coloring a background color when the EL is lit, have been adopted. However, the hue of the color polarizer is limited, the degree of polarization of the color polarizer is low, and only low-quality display with low contrast can be obtained. There's a problem.

[0003] Liquid crystal displays are used in many office equipment and home appliances, including watches and calculators, and most of them are black and white displays. In recent years, the colorization of the entire product including the LCD display device has been progressing, but the liquid crystal display device has not been able to sufficiently cope with this trend because the display device is still displaying black and white.

[0004]

[Problems to be solved by the invention]

 In response to the trend toward colorful products as a whole, including liquid crystal display devices, there is a need for a polarizing plate that gives a desired hue to the liquid crystal display device and obtains a display with higher contrast and quality than using a color polarizing plate. Was.

[0005]

[Means for Solving the Problems]

 A dye or pigment is added to the pressure-sensitive adhesive layers of various transmission / reflection / semi-transmission polarizing plates.

[0006]

[Embodiment of the invention]

 1 and 2 show the configuration of the present invention. A dye or pigment is added to any or all of the pressure-sensitive adhesive layers shown in FIGS.

The dye, pigment and polarizing plate used in the present invention are not particularly limited, but an oil-soluble dye is preferable as the dye, and a high transmittance and high polarization degree is desired as the polarizing plate. No.

[0008]

[Effect of the invention]

 Since an arbitrary hue can be obtained on the liquid crystal display, the degree of freedom in design including the colors of the entire product has been increased. Also, regardless of whether the backlight is lit or not, the same color display can be obtained at all times, so that a display body without discomfort can be obtained. In addition, by selecting a polarizing plate to be used, a high-contrast display was obtained, and a higher quality display was obtained than when a color polarizing plate was used.

[Brief description of the drawings]

FIG. 1 is a sectional view of a transmission type polarizing plate.

FIG. 2 is a cross-sectional view of a reflective or transflective polarizing plate.

[Explanation of symbols]

 1: Protective film 2: Polarizing plate 3: Adhesive 4: Release film 5: Reflector or translucent film

Claims (1)

[Utility model registration claims] 1. A dye or pigment is added to an adhesive layer for attaching a polarizing plate to an LCD cell, and / or an adhesive layer for attaching a reflective film or a transflective film to a polarizing plate, or both adhesives. A polarizing plate added to give an arbitrary hue.