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Reflector and liquid crystal display device using the same

A technology of reflectors and recesses, which is applied in the direction of diffusion elements, static indicators, optics, etc., can solve the problems of reduced reflectivity, darkened display, etc., and achieve the goal of expanding the range of viewing angles, expanding the characteristics of viewing angles, and improving visual resolution Effect

Inactive Publication Date: 2005-04-06
ALPS ALPINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, if Figure 14 In the shown existing reflective liquid crystal display device, most of the incident light is reflected toward the direction of specular reflection and its vicinity (representing the reflection characteristic of Gaussian distribution type (refer to Figure 16 )), therefore, the display viewed from the direction of specular reflection and its surroundings is brighter, while the display viewed from other directions (especially the direction close to the normal direction H to the display surface) is brighter than that viewed from the direction of specular reflection dark situation
In addition, when the viewing angle is increased to effectively capture light incident from a more oblique direction (for example, light incident at an angle exceeding 45 degrees from the normal direction), the overall reflectance decreases and the display becomes dark.

Method used

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  • Reflector and liquid crystal display device using the same
  • Reflector and liquid crystal display device using the same
  • Reflector and liquid crystal display device using the same

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no. 1 Embodiment approach

[0058] FIG. 1 is a schematic partial cross-sectional structural view schematically showing a simple matrix reflective liquid crystal display device according to a first embodiment of the present invention.

[0059] In FIG. 1 , the reflective liquid crystal display device 1 has a structure in which a first substrate 10 (the other substrate away from the viewing side) and a second substrate 20 are formed of opposing transparent glass with a liquid crystal layer 30 sandwiched between them. (The substrate on the observation side) is bonded together by a sealing material (not shown) provided annularly at the edge of the two substrates 10 , 20 .

[0060] On the inner surface side (the liquid crystal layer 30 side) of the first substrate 10, a reflector 47, a transparent interlayer 53 formed as desired, a color filter 13 for color display, and a color filter 13 for color display are sequentially stacked and formed. A protective film (overcoat film) (transparent planarization layer) 1...

no. 2 Embodiment approach

[0115] Next, a reflection type liquid crystal display device as a second embodiment of the present invention will be described.

[0116] 13 is a schematic diagram showing a partial cross-sectional structure of a reflective liquid crystal display device according to a second embodiment.

[0117] Reflective liquid crystal display device 100 of the second embodiment and FIGS. image 3 The first reflective liquid crystal display device 1 shown differs in the structure of the reflector provided in the liquid crystal cell, and in the outer surface of the substrate 20 which is the viewing side of the pair of substrates 10 and 20 constituting the liquid crystal cell. A light scattering layer 29 is provided.

[0118] The reflector 47a included in the reflective liquid crystal display device 100 according to this embodiment is composed of an organic film 11a and a metal reflective film (metal film) 12a formed on the organic film 11a.

[0119] Figure 11 It is a top view showing a par...

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Abstract

A reflector is formed such that a plurality of large-diameter concave portions having light reflectivity are formed on a surface of a metal film formed on a base material in irregular pitches, a plurality of small-diameter concave portions each having a diameter smaller than that of the large-diameter concave portion are formed between the large-diameter concave portions, an inner surface of the large-diameter concave portion has a curved surface which is a portion of a sphere or a non-sphere, an inner surface of the small-diameter concave portion has a curved surface which is a portion of a sphere or a non-sphere, and, in the metal film formed with the plurality of the large-diameter concave portions and the plurality of the small-diameter concave portions on the surface thereof, the inclination of a sectional curved line of a vertical surface at the boundary of the adjacent concave portions is discontinuous. The liquid crystal display device is formed such that the reflector is attached on an inside or an outside of the liquid crystal cell.

Description

technical field [0001] The invention relates to a reflector and a liquid crystal display device using the reflector. Background technique [0002] In general, the display forms of liquid crystal display devices include those having a backlight called a transflective type, a transmissive type, and a reflective type. A reflective liquid crystal display device is a liquid crystal display device that uses only external light such as sunlight and illumination light to display without using a backlight, and is often used in portable information terminals that require thinner, lighter weight, and lower power consumption, for example. In addition, a transflective liquid crystal display device operates in a transmissive mode with the backlight turned on in an environment where the external light cannot be sufficiently obtained, and operates in a reflective mode in which the backlight is not turned on when sufficient external light can be obtained. It is mostly used in portable elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02G02B5/08G02B5/09G02B5/10G02F1/1333G02F1/1335
CPCG02B5/09G02F1/133553G02B5/10G02F1/1335
Inventor 吉井克昌
Owner ALPS ALPINE CO LTD
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