JPH0446260Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] The present invention is a liquid crystal display in which, for example, a liquid crystal display panel is used to display the scale of a meter, and a pseudo pointer formed by a light beam is used to indicate the scale. The present invention relates to an instrument that combines functions and a display function using a light beam.

[Background of the idea]

In general, meters using liquid crystal display panels typically display measured values, such as speed and voltage, digitally using a 7-segment display or analogously using a bar graph display.

However, in the case of meters using such liquid crystal display panels, for example, when displaying the pointer of the meter on a liquid crystal display, many linear segment electrodes must be formed radially, making electrode pattern formation complicated. There was a problem of digitization.

[Purpose of invention]

The purpose of this invention is to simplify the electrode pattern formation for liquid crystal display by displaying the pointer using a light beam such as a laser beam and displaying the scale etc. on liquid crystal, and at the same time to display three-dimensional display. The aim is to provide an instrument that can also obtain images.

[Example of idea]

The present invention will be explained in detail below based on the embodiment shown in FIGS. 1 and 2.

In the figure, 1 is a chip-on-glass type liquid crystal cell 2
and polarizing plates 3, 3 provided at the front and rear of the liquid crystal cell 2, respectively, and the polarizing axes of the polarizing plates 3, 3 are arranged so that the display section of the liquid crystal cell 2 displays a positive display. has been done.

The liquid crystal cell 2 has a TN liquid crystal 23 sealed between a pair of translucent substrates 21 and 22 facing each other with a spacer 20 in between, and the inner surface of one of the translucent substrates 21 has, as shown in FIG. For example, display electrodes 24 are provided to indicate speed scales and scale values, and a common electrode 25 is provided on the inner surface of the other transparent substrate 22. Further, on one of the transparent substrates 21, a second
In the figure, light-reflecting fine particles are mixed in the area indicated by the semicircular dotted line, and when a light beam such as a laser beam is incident from the end surface of one of the translucent substrates 21, the light beam is reflected. The particles are reflected and can be seen in a linear manner.

Reference numeral 4 denotes a drive unit consisting of a movement for driving a pointer used, for example, in an automobile speedometer, and its rotational drive axis 41 is parallel to the optical axis of the liquid crystal display panel 1.
A first reflecting mirror 5 that vertically reflects the laser beam toward the end face of one of the translucent substrates 21 is fixed thereto. A second reflecting mirror 6 is fixed to the liquid crystal cell 2, and is configured to reflect a laser beam A from a laser oscillator (not shown) onto the first reflecting mirror 5.

That is, by driving the drive unit 4, the laser beam A is deflected according to the rotation of the rotary drive shaft 41, so that a pseudo pointer (indicated by the broken line in FIG. 2) by the laser beam is created in one of the transparent substrates 21. will be formed.

Reference numeral 7 denotes a light diffusing and reflecting plate formed in a dome shape, which forms a space 71 behind the liquid crystal display panel 1 and gives a sense of depth to the display section of the liquid crystal display panel 1 and the pseudo pointer produced by the laser beam A. .
Reference numeral 8 denotes a cold cathode tube disposed around or in a part of the light diffusing and reflecting plate 7 to illuminate the surface of the light diffusing and reflecting plate 7 substantially uniformly, and the light from this discharge tube 8 directly enters the eye. An umbrella 9 is provided near the discharge tube 8 to prevent this.

That is, the display section of the liquid crystal display panel 1 is displayed in a positive manner, and the pseudo pointer formed by the laser beam is displayed in a linear form, and the liquid crystal display panel 1 is illuminated by light diffused and reflected on the inner surface of the light diffusing and reflecting plate 7. Therefore, each display section is displayed three-dimensionally.

Therefore, according to this embodiment, the pointer is a pseudo pointer using a laser beam, and the scale and scale values are displayed on the liquid crystal, so that the formation of the electrode pattern of the liquid crystal cell 2 can be simplified, and moreover, it is possible to simplify the formation of the electrode pattern of the liquid crystal cell 2. In combination with a laser beam, a new display formation can be provided, and if the liquid crystal cell and laser oscillator are driven only in a driving manner, it looks like a mere transparent plate in a non-driving manner, and at the same time as driving, e.g. A fresh taste is always obtained to be displayed as a speedometer.

In this embodiment, the light-reflecting fine particles are mixed only in a part of one of the light-transmitting substrates 21, but they may be mixed in the whole part, or the light-reflecting fine particles are mixed in both the light-transmitting substrates 21. may be mixed therein so that the light beams are incident on the end faces of the respective translucent substrates.

[Summary of the idea]

As explained above, the present invention includes a liquid crystal display panel 1 in which a liquid crystal 23 is sealed between a pair of transparent substrates 21 and 22, and a scale is provided in an arc shape on the display surface; a light diffuser and reflector 7 provided on the back surface of the liquid crystal display panel for verifying transmission through the liquid crystal display panel; and the transparent substrates 21 and 2.
2, at least light-reflecting fine particles mixed inside the arcuate scale; and a light beam generating means for making a light beam incident from the center of the arcuate scale toward the scale through the inside of the translucent substrate. This instrument is characterized by having:

[Effect of idea]

Therefore, according to the present invention, in addition to the display function of the liquid crystal display, the display function of using a light beam such as a laser beam as a pseudo guide is added. In addition to simplifying the formation of electrode patterns,
The effect of three-dimensional display can be obtained by using the light diffusing and reflecting plate.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of a meter according to the present invention, and FIG. 2 is a front view thereof. 1...Liquid crystal display panel, 2...Liquid crystal cell, 3...
...Polarizing plate, 4...Drive unit, 5, 6...Reflecting mirror, 7...Light diffusing and reflecting plate, 8...Cold cathode discharge tube,
9...Umbrella.

Claims (1)

[Scope of utility model registration request] A liquid crystal display panel 1 includes a liquid crystal 23 sealed between a pair of transparent substrates 21 and 22, and has scales arranged in an arc shape on its display surface; A light diffuser and reflector 7 for transmitting illumination of the display panel, light-reflecting fine particles mixed into at least the inside of the arc-shaped scale of the translucent substrates 21 and 22, and a light-transmitting part from the center of the arc-shaped scale 1. A meter comprising: a light beam generating means for making a light beam incident in the direction of the scale through the inside of the substrate.