JPS61267781A - Electronic equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to electronic equipment, and more particularly to electronic equipment equipped with a liquid crystal display.

[Summary of Disclosure] This specification and drawings describe a case in which external light is reduced by providing an electroluminescent panel on the back of a liquid crystal panel via a transflective reflector in an electronic device equipped with a liquid crystal display. The present invention discloses a technology that allows display contents to be viewed even in a computer.

[Prior Art] Electronic devices such as small and portable portable computers that use replaceable batteries as a driving source are widely used.

With the advent of such portable computers, the scope of their use has expanded, and they are now often used outdoors at night or in dark places such as inside warehouses.

An example of a conventional electronic device of this type is shown in FIG.

Figure 2 shows a portable computer as an example of electronic equipment.
A keyboard section 12 consisting of a group 11 of input keys such as a numeric keypad is formed in one part of the portable computer 10, and a liquid crystal display 13 is provided in the other part.

This liquid crystal display 13 has M as shown in the male diagram in FIG.
It consists of a liquid crystal panel 1 that performs display under the control of a PU and a perfect reflector 4 placed on the back of the liquid crystal panel 1.The perfect reflector 4 reflects external light so that the liquid crystal display can be clearly displayed. It is composed.

[Problems to be Solved by the Invention] However, when an electronic device such as a portable computer is equipped with a liquid crystal display as a display, the liquid crystal display changes the orientation of liquid crystal molecules by applying a voltage.
Since it is a display device, it does not emit light by itself, and the displayed content could not be seen in a dark atmosphere.

That is, in the conventional structure, external light is reflected by a metal reflective plate to make the liquid crystal display easy to see, so if there is no external light, the display cannot be seen.

Therefore, it has been proposed to provide illumination lamps around the liquid crystal display, but this has the disadvantage that if the liquid crystal display is large, the entire display is not evenly illuminated, making it extremely difficult to see.

[Means for Solving the Problems] In order to solve the above-mentioned problems, in the present invention, an EL panel (electroluminescence panel) is arranged behind the liquid crystal display, and the illumination by this EL panel can be freely controlled. We adopted a structure that allows it to be turned on and off.

[Function] If the structure described above is adopted, when using a portable computer equipped with a liquid crystal display in a dark place,
This makes it possible to turn on the EL panel, uniformly illuminate the entire display area, and obtain an extremely easy-to-read liquid crystal display.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

FIG. 1 explains one embodiment of the present invention. In the figure, reference numeral 1 indicates a liquid crystal panel, a transflective plate 2 is provided below the liquid crystal panel, and an EL panel is further provided below the liquid crystal panel. A panel 3 is provided.

Since this embodiment is configured as described above, when there is external light in a normal atmosphere, the display is performed using the reflected light from the semi-transmissive reflector 2, and when there is no external light and the liquid crystal display is no longer visible, A switch provided in a part of the casing of a portable computer (for example, the symbol S in Fig. 2)
Turn on the switch (shown by ) to guide the light from the EL panel through the semi-transmissive reflector 2, thereby illuminating the liquid crystal display for easy viewing.

In the above-described embodiments, the EL panel was illustrated as a simple panel, but the EL panel may be provided with a character pattern so that it can display some kind of display at the same time as illumination.

[Effects] As is clear from the above description, according to the present invention, a structure in which an EL panel is arranged on the back side of a liquid crystal display via a semi-transmissive reflector is used, which reduces external light. In such a case, if the EL panel is turned on, the liquid crystal display can be illuminated from the back through the semi-transmissive reflector, allowing the display contents to be viewed freely even in a dark place.

[Brief explanation of the drawing]

Claims (1)

[Claims] 1. An electronic device equipped with a liquid crystal display, characterized in that an electroluminescent panel that can be turned on and off from the outside via a semi-transmissive reflector is arranged on the back side of the liquid crystal panel.