JPH0248864Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Field of application of invention] The present invention relates to a liquid crystal display device.

[Background of the idea]

Examples of conventional liquid crystal display devices include those shown in FIG.
There is something like the one shown in Figure 4. This liquid crystal display device includes a numerical display section P that displays the speed of the automobile,
It is equipped with a mark display part Q forming a direction indication display part and a specific display part Q' showing the high beam of the headlights, and a color filter 2 which is a diffusion plate on the back side of the liquid crystal cell 1, a light guide plate 3, A reflector plate 4 is provided to guide light from a lamp 5 to the light guide plate 3 to display each display section P, Q, Q' in color.

By the way, in such a conventional liquid crystal display device, the light guide plate 3 emits the light from the lamp 5 toward each display section P, Q, and Q' from its exit surface side with approximately the same intensity. Therefore, the specific display part Q' that requires high visibility and other display parts P,
Unable to differentiate display brightness from Q,
There was a problem that the visibility of the specific display section Q' was lacking.

[Purpose of invention]

This invention was developed to solve these conventional problems, and by making the illumination light of a specific display part stronger than the illumination light of other display parts, the visibility of the specific display part is improved. It is an object of the present invention to provide a liquid crystal display device that allows

[Example of idea]

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

The liquid crystal display device according to this embodiment is provided with a speed display section (numerical display section) P at the bottom, a direction indication display section (mark display section) Q and a high beam display section (specific display section) for the headlights at the top. A color filter 2 serving as a diffuser plate, a light guide plate 10, a reflector 11, and an auxiliary light guide plate 12 are laminated in this order on the back surface of a liquid crystal cell 1 having Q′. Light from the main lamp 13 is guided, and light from the auxiliary lamp 14 is also guided to the auxiliary light guide plate 12. This leading light plate 1
0 is formed into a tapered shape that is thicker at the lower end and thinner at the upper end in order to reduce the thickness of the entire device, and guides the light from the main lamp 13 to the entire back surface of the liquid crystal cell 1 through the color filter 2. , Q, and Q' are displayed in color. Further, the emission part 12a of the auxiliary light guide plate 12 is arranged corresponding to the high beam display part Q' of the liquid crystal cell 1, and the light from the auxiliary lamp 14 is reflected by a reflecting plate provided corresponding to the emission part 12a. 11, through the light guide plate 10 and the color filter 2, and then led to the high beam display section Q' of the liquid crystal cell 1.

Therefore, the high beam display section Q' is illuminated by the main lamp 13 and the auxiliary lamp 14, and the speed display section P and direction indicator display section Q are illuminated only by the main lamp 13, so that the high beam display section Q' is illuminated by the main lamp 13 and the auxiliary lamp 14. The section Q' can be illuminated more brightly than the other display sections P and Q, and the visibility of the high beam display section Q' can be improved.

[Summary of the idea]

As described above, the present invention includes a liquid crystal display cell 1, a color filter 2 disposed on the back surface of the liquid crystal display cell 1, and a first light source 13 disposed on the back surface of the color filter 2. a first light guide 10 that guides light from the color filter 2 to the entire back surface of the color filter 2 to illuminate the entire display section of the liquid crystal display cell 1;
A second light source 14 is disposed on the back surface of the first light guide 10 and directs light from the second light source 14 to a portion of the back surface of the first light guide 10 corresponding to the specific display area Q' of the liquid crystal display cell 1. This is a liquid crystal display device characterized by comprising a second light guide 12 that guides and illuminates only the specific display section Q'.

[Effect of idea]

Therefore, according to the present invention, in addition to the light from the first light source 13 that illuminates the entire liquid crystal cell 1, the specific display section Q' receives light from the second light source 14 via the second light guide 12. light enters the specific display area.
Q' can be displayed in color brighter than other display parts of the liquid crystal cell 1, and the visibility of the specific display part Q' can be improved.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a liquid crystal display device according to the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a plan view of a conventional liquid crystal display device, and FIG. 4 is a sectional view thereof. There is. 10: Main light guide plate, 11: Reflector plate, 12: Auxiliary light guide plate, 13: Main lamp, 14: Auxiliary lamp, 1
5: Through hole.

Claims (1)

[Scope of utility model registration request] A liquid crystal display cell 1, a color filter 2 disposed on the back surface of the liquid crystal display cell 1, and a first light source 13 disposed on the back surface of the color filter 2, which directs light from the entire back surface of the color filter 2. a first light guide 10 that guides light to illuminate the entire display section of the liquid crystal display cell 1; and a second light guide 12 that guides to the back side of the first light guide 10 corresponding to the specific display area Q' of the display cell 1 and illuminates only the specific display area Q'. Characteristic liquid crystal display device.