JPH0733214Y2 - Transflective liquid crystal display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a liquid crystal display device capable of color display by reflected light and transmitted light.

[Conventional technology]

As a conventional liquid crystal display device of this type, there is one having a structure as shown in FIGS. 4 and 5, for example. This is because the front side polarizing plate 3 and the back side polarizing plate 4 are superposed on the front side and the back side of the liquid crystal cell 2 capable of positively displaying characters 1 and the like, and the back side of the back side polarizing plate 4 is A translucent colored film 5 that is translucently colored is overlaid, and a half mirror 6 is overlaid on the back surface of the translucent colored film 5, which is disposed on the half mirror 6 side. By turning on the illumination sphere 7, the characters etc. of the liquid crystal cell 2
Is displayed by transmitted light, and when the illuminating sphere 7 is not lit, the light incident from the front side of the liquid crystal display device is reflected by the half mirror 6, and the character 1 or the like is displayed by the reflected light. is there.

[Problems to be solved by the device]

At the time of the display by the reflection illumination and the display by the transmission illumination, the background of the display portion of the characters 1 is displayed in color in the five colors of the film by the light transmitted through the translucent colored film 5. However, the background color is determined by the translucent colored film 5, and there is a problem that the display color in day and night cannot be changed to multiple colors, for example.

[Means for Solving the Problems]

The present invention has been made in view of such a conventional liquid crystal display device. For example, a background color can be changed between a display by reflected light and a display by transmitted light, and a multicolor background display is performed. An object of the present invention is to provide a liquid crystal display device that can be manufactured.

〔Example〕

The present invention will be described below in detail with reference to the embodiments shown in FIGS.

In FIG. 1 and FIG. 2, reference numeral 11 denotes a TN type or GH type liquid crystal cell for positive display. As shown in FIG. 12b is configured to be positively displayed. 13 and 14 are
A front side polarizing plate and a back side polarizing plate, which are superposed on the front surface and the back surface of the liquid crystal cell 11, respectively.
13,14 are the same as the conventional ones. The upper half and the lower half of the back surface of the back side polarizing plate 14 are provided with translucent colored layers 15a and 15b, but these colored layers 15a and 15b are of different colors, and one of the colored layers is 15a is provided behind the display 12a, and the other colored layer 15b is provided corresponding to the back of the display 12b. A half mirror 16 is superposed on the back surface of the colored layers 15a and 15b, and a colored layer 15c different in color from the colored layers 15a and 15b is provided on the upper and lower surfaces of the back surface of the half mirror 16. Is. Reference numeral 17 indicates an illuminating sphere.

As described above, in the present embodiment, the half mirror 16 in which translucent colored layers of different colors are superposed on the front and back sides of the liquid crystal cell 11 is used.
Therefore, for example, when viewing the liquid crystal display device with reflected light, the light incident from the front (surface) thereof is reflected by the half mirror 16, and the reflected light is the colored layer 15a, Displayed as 12a, 1 as it is colored through 15b
The top and bottom of the background of 2b are displayed in different colors. Also its display
When viewing 12a, 12b with transmitted light due to lighting of the sphere 17,
Since the light emitted from the illumination sphere 17 is transmitted through the colored layers 15c and the colored layers 15a and 15b to display the background in a colored manner, the colored display color is a composite color of the colored layers 15c and 15a and the colored layer 15c. In order to display a color by a composite color of the colored layer 15b and the colored layer 15b, the background color due to the reflected light and the background color due to the transmitted light are different colors, and a multicolor display is possible.

In the embodiment shown in FIG. 3, a colored layer 15c is applied to the entire front surface of the half mirror 16, a colored layer 15a is applied to the upper half of the rear surface of the half mirror 16, and a colored layer 15b is applied to the lower half thereof. Is. Therefore, in this embodiment, the display 12a
And the background of 12b look the same color by the transmitted light of the colored layer 15c, and the light bulb 17
In the transmitted light of, the background of the display 12a is displayed in a composite color of the colored layers 15a and 15c, and the background of the display 12b is displayed in color of a composite color of the colored layers 15b and 15c. .

Although the half mirror 16 is used in the above embodiment, a semi-transmissive semi-reflective plate may be used.

[Effect of device]

Thus, according to the present invention, a monochromatic light-transmitting colored layer is applied to the entire surface of either the front surface or the back surface of a plate material that retains both the properties of semi-transmissivity and semi-reflective property, and On the back surface of the transmissive liquid crystal display panel (11), a semi-transmissive semi-reflective plate with a multi-colored translucent colored layer applied to each surface is divided into a plurality of areas. Since it is a semi-transmissive-semi-reflective liquid crystal display device that is superposed, according to this liquid crystal display device, when the liquid crystal display device is viewed with reflected light,
Light incident from the front (front surface) is reflected by the semi-transmissive semi-reflective plate, and the reflected light is transmitted through the colored layer on the front to be colored and displayed. Is displayed.

When viewing the multiple displays with transmitted light from the illumination sphere, the colored display color is the front because the light emitted from the illumination sphere is transmitted through the colored layer on the front surface and the colored layer on the back surface to display the colored background. A plurality of displays formed on the display surface of the transmissive liquid crystal display panel 11 become a composite color of the colored layer and the colored layer on the back surface.
The feature is that they are displayed in different colors (multicolor).

[Brief description of drawings]

FIG. 1 is a front explanatory view showing an embodiment of a liquid crystal display device according to the present invention, FIG. 2 is a sectional explanatory view thereof, FIG. 3 is a sectional view showing other embodiments, and FIG. 4 is a conventional example. Is a front view and FIG. 5 is a sectional view thereof. 11 …… Liquid crystal cell, 12a, 12b …… Display 13,14 …… Polarizing plate, 15a, 15b, 15c …… Coloring layer 16 …… Half mirror, 17 …… Illumination sphere

Claims (1)

[Scope of utility model registration request] 1. A single-color translucent colored layer is applied to the entire surface of either the front surface or the back surface of a plate material that retains both semi-transmissive and semi-reflective properties, and the other surface of the plate material is further provided. Is a semi-transmissive semi-reflecting plate, in which the surface is divided into a plurality of areas, and each translucent colored layer having multiple colors is applied to each of the divided areas.
A transflective liquid crystal display device, characterized in that the transflective liquid crystal display plate (11) is superposed on the back surface of the liquid crystal display plate (11).