JPH0618384Y2 - LCD display panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a liquid crystal display panel improved so as to improve display performance.

[Conventional technology]

For example, as a conventional example of a liquid crystal display panel capable of displaying the vehicle speed of an automobile by both a bar graph and a digital display, there is a structure as shown in FIGS. 4 and 5. (1) is a bar-graph-shaped speed display unit in which a large number of bar-shaped segments (2) are arranged in a substantially fan shape as shown in FIG.
A liquid crystal cell comprising (3) and a digital speed display section (4) in which the ones and tens are 7 segments and the hundreds is 6 segments. ), Both front and back sides, high polarization degree polarizing plate (5) or medium polarization degree polarizing plate (6)
Either one of them is overlaid to form a liquid crystal display panel for vehicle speed display.

[Problems to be solved by the device]

However, in a liquid crystal display panel having such a structure, for example, a polarizing plate using a high polarization degree polarizing plate (5), as shown in FIG. In 4), only the lit segment is displayed, and the non-lit segment is barely noticeable. Therefore, in this conventional example, the display of 180 km / h is clearly displayed. The lighted segment (2) is clearly displayed even in the bar graph display part (3), but it is barely noticeable in the non-lighted segment, as shown in Fig. 6 (a). In addition, there is a problem in that the entire area of the bar display for displaying 180 or more in the bar graph display unit is difficult to understand, and the display is uncomfortable or unclear.

If the polarizing plate used is a medium polarization plate (6), as shown in Fig. 6 (b), the non-lit segments in the bar graph-shaped display part (3), that is, 180 to 260 The segment showing the value of is displayed lightly by the polarized light by the transmitted illumination light (dotted line part in the drawing), so the entire display area of the bar graph display part (3) becomes clear and the visibility of the displayed value is improved. However, on the other hand, the non-lighted segment of the digital speed display section (4) (segment shown by the dotted line in the drawing) is also displayed faintly due to the polarization effect, so that the digital speed display section (4) has a display property. There is a problem that it is bad and hard to see.

[Means for Solving the Problems]

The present invention has been made in view of such a problem, and in a liquid crystal cell provided with a display pattern similar to that of the conventional example, that is, a bar graph-shaped display section and a digital display section, on the back surface of the liquid crystal cell. In the position corresponding to the bar graph-shaped display unit, the medium polarization degree polarizing plate is positioned, and the high polarization degree polarizing plate is positioned in the digital display unit, and in the bar graph shaped display unit, It is an object of the present invention to provide a liquid crystal display panel which can expect display of a segment by polarization of transmitted illumination light and can suppress segment display by polarization of a digital display to improve displayability.

〔Example〕

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

(11) is a bar graph display section (13) in which a large number of bar-shaped segments (12) are arranged in a substantially fan shape as shown in FIG. It is a liquid crystal cell in which a digital speed display section (14) having 6 segments is formed. A high polarization degree polarizing plate (15) is stacked on the surface of the liquid crystal cell (11), and a medium polarization degree polarizing plate (16) is stacked on the back surface of the liquid crystal cell (11). The position corresponding to the digital display part (14) in the polarization degree polarizing plate (15) is formed (may be attached) to the high polarization degree polarizing plate (15).
It has been done.

As described above, in this embodiment, when the transmitted illumination light (not shown) is turned on after driving the liquid crystal cell, the display segments of the digital display unit (14) and the bar graph-shaped display unit (13) are transmitted. Although it is lit by light, the non-lit segment of the bar-graph shaped display part (13) is shown in the dotted line area in FIG. 3 by the slight transmitted light that passes through the medium polarization plate (16). Since the part is displayed lightly, it is possible to judge the entire area of the bar graph-shaped display portion (13). On the back of the digital display (14), a high polarization degree polarizing plate
By (15) is overlapped, the transmission of polarized light is suppressed,
As a result, the segment in the non-illuminated state is hardly visible from the surface, and the display of 180 km / h is clearly displayed as shown in FIG.

[Effect of device]

As described above, according to the present invention, the bar graph-shaped display unit (13)
A liquid crystal display panel having a digital display section (14), wherein the bar graph-shaped display section (13) and the digital display section (1
Since it is a liquid crystal display panel in which the degree of polarization of the portion corresponding to 4) is made different, it is possible to change the degree of transmitted light between the bar graph display section and the digital display section, that is, the degree of polarization. Therefore, for example, in the digital display section, the non-lighted segment can be displayed lightly to display the entire display area, and in the digital display section, the shadow of the non-lighted segment can be eliminated and only the lighted segment can be displayed. Since it is possible to clearly display, it is possible to obtain the effect of improving the ease of display and the clarity.

[Brief description of drawings]

FIG. 1 is a front view showing a mode of a display segment showing an embodiment of a liquid crystal panel according to the present invention, FIG. 2 is an exploded perspective view thereof, FIG. 3 is an explanatory view of a display mode of the present embodiment, and FIG. FIG. 5 and FIG. 5 are explanatory views of the configuration of a conventional example, and FIGS. 6 (a) and 6 (b) are explanatory diagrams showing a conventional display mode. (11) …… Liquid crystal cell, (12) …… Bar segment (13) …… Bar graph display section (14) …… Digital display section, (15) …… High polarization degree polarization plate (16) …… Medium polarization plate

Claims (1)

[Scope of utility model registration request] 1. In a liquid crystal display panel having a bar graph-shaped display section (13) and a digital display section (14), a portion corresponding to the bar graph-shaped display section (13) and the digital display section (14) is provided. A liquid crystal display panel characterized by different polarizations.