JPH0428146Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a display device that can switch between red, blue, and yellow displays on one display unit, for example, to display signals in underground parking lots. It is related to.

[Conventional technology and problems]

Conventionally, such display devices generally house indicator lights for each of red, blue, and yellow display colors in a case, and selectively display red, blue, and yellow, respectively, by lighting each indicator light separately. It's becoming like that.

However, in a display device configured in this way, an indicator light must be provided for each display color within the case, which increases manufacturing costs and requires space to mount these indicator lights. This results in a relatively large display device as a whole, and since the indicator lamp itself consumes a large amount of power, there are drawbacks such as high running costs.

[Purpose of invention]

In view of the above points, the present invention displays red, blue, and yellow on one display unit.
It is an object of the present invention to provide a display device having a simple and compact configuration, which reduces the number of parts, and reduces manufacturing costs and running costs.

[Means and actions for solving problems]

The above objects, according to the present invention, include a color dot matrix liquid crystal cell, a display frame disposed in front of the liquid crystal cell and provided with a notch defining a display surface of the liquid crystal cell, and a display frame provided in front of the display frame. A light diffusing member, preferably a diffusing plate or a lens, disposed on the liquid crystal cell, an upper frame and a lower frame extending horizontally from the upper and lower edges of the liquid crystal cell toward the rear, and holding the display frame and the light diffusing member. , and a liquid crystal display panel consisting of a drive circuit for driving a liquid crystal cell attached to the upper frame or lower frame is disposed inside the case, and a liquid crystal display panel for back illuminating the liquid crystal display panel is disposed approximately in the center of the case. This is achieved by a display device that is provided with a light source and further has a drive control circuit for controlling a drive circuit of a liquid crystal display panel in its case.

According to this invention, one color dot matrix liquid crystal cell is used, and by appropriately selectively driving and controlling the three color display dots that constitute each pixel of the liquid crystal cell, the display can be controlled by the light from the light source. For example, red, blue, or yellow display can be performed on the entire display surface of the liquid crystal cell.

Therefore, manufacturing costs are reduced, the mounting space within the case is significantly reduced, and power consumption during display is also reduced, and the light transmitted through the liquid crystal cell is diffused by the light diffusing member. Therefore, even when the display device is observed from an oblique direction, the display by the display device can be observed with good visibility.

〔Example〕

The present invention will be described below based on embodiments shown in the drawings.

FIG. 1 shows an embodiment of a display device according to the present invention, in which a display device 10 has a liquid crystal display panel 12 mounted inside a case 11 facing the front thereof.

The liquid crystal display panel 12, as shown in FIG.
a color dot matrix type liquid crystal cell 13 that is upright and has a substantially rectangular shape for performing a desired display; a display frame 14 that is disposed in front of the liquid crystal cell 13 and defines a display surface of the liquid crystal cell 13; Furthermore, it includes a diffusion plate 15 disposed in front of the liquid crystal cell 13, and an upper frame 16 and a lower frame 17 extending horizontally from the upper and lower edges of the liquid crystal cell 13 toward the rear,
The display frame 14 and the diffusion plate 15 are connected to the upper frame 16.
and is held by the lower frame 17. In addition, either one or both of the upper frame 16 and the lower frame 17,
A drive circuit 18 made of a printed circuit board for driving the liquid crystal cell 13 to display an appropriate display is mounted with, for example, screws.

The liquid crystal display panel 12 is configured in this manner and is attached to the front surface of the case 11. Further, a light source 19 for back-irradiating the liquid crystal cells 13 of the liquid crystal display panel 12 from behind is provided in a space defined between the liquid crystal display panels 12 at approximately the center of the case 11. A control circuit 20 is provided at the bottom of the case 11 to appropriately drive the drive circuit 18 of each liquid crystal display panel 12 to perform display.

The display device according to the present invention is configured as described above, and the drive circuit 18 of the liquid crystal display panel 12 is
By appropriately controlling the control circuit 20, the liquid crystal cell 13 of the liquid crystal display panel 12 displays a desired color, for example, red, and yellow between blue, thus changing the display frame 14 of the liquid crystal display panel 12. A desired signal is displayed on the display section defined by the above.

At this time, when the light from the light source 19 passes through the liquid crystal cell 13, it is colored in the display color of each pixel, passes through the liquid crystal cell 13, is diffused by the diffuser plate 15, and is emitted to the outside. Therefore, even when the display surface of the display device 10 is observed from an oblique direction as shown by the arrow A, the signal display of the desired color by the liquid crystal cell 13 can be observed with good visibility.

In addition, in the embodiment described above, the liquid crystal cell 13
Although the diffuser plate 15 is used to diffuse the light that has passed through the lens, other configurations can be used as long as it has the effect of diffusing light, such as a light-diffusing lens as shown in Figure 3. It is also possible to use 15'.

[Effect of idea]

As described above, according to the present invention, there is provided a color dot matrix liquid crystal cell, a display frame disposed in front of the liquid crystal cell and provided with a notch defining a display surface of the liquid crystal cell, and the display frame. a light diffusing member, preferably a diffusing plate or lens, disposed in front of the liquid crystal cell; an upper frame extending horizontally from the upper and lower edges of the liquid crystal cell toward the rear and holding the display frame and the light diffusing member; A liquid crystal display panel consisting of a lower frame and a drive circuit for driving the liquid crystal cells attached to the upper frame or the lower frame is disposed inside the case, and the liquid crystal display panel is provided with back lighting approximately in the center of the case. Since the display device is configured such that a light source is disposed for controlling the liquid crystal display panel, and a drive control circuit for controlling the drive circuit of the liquid crystal display panel is disposed within the case, one color dot matrix liquid crystal cell can be used. By appropriately selectively driving and controlling the three color display dots constituting each pixel of the liquid crystal cell, the entire display surface of the liquid crystal cell is illuminated with red, blue, or yellow, for example, by light from the light source. It becomes possible to perform display.

Therefore, with the display device of the present invention, the manufacturing cost is reduced, the mounting space within the case is significantly reduced, the power consumption during display is also reduced, and the liquid crystal cell can be Since the transmitted light is diffused by the light diffusing member, the display by the display device can be observed with good visibility even when the display device is observed from an oblique direction.

Thus, according to the present invention, it is possible to provide a display device that has a simple and compact configuration, can be manufactured at low cost, and has high visibility and excellent display quality.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view showing an embodiment of the display device according to the present invention, FIG. 2 is a side sectional view of the display device shown in FIG. 1, and FIG. It is a partial side sectional view. 10...display device, 11...case, 12...
Liquid crystal display panel, 13...Liquid crystal cell, 14...Display frame, 15...Diffusion plate, 15'...Lens, 16
...Upper frame, 17...Lower frame, 18...Drive circuit, 1
9...Light source, 20...Control circuit.

Claims (1)

[Claims for Utility Model Registration] (1) A color dot matrix liquid crystal cell, a display frame disposed in front of the liquid crystal cell and provided with a notch defining the display surface of the liquid crystal cell, and a light diffusing member disposed at the front; an upper frame and a lower frame extending horizontally from the upper and lower edges of the liquid crystal cell toward the rear and holding the display frame and the light diffusing member; A liquid crystal display panel consisting of a drive circuit for driving a liquid crystal cell mounted on a lower frame is disposed within a case, and a light source for backlighting the liquid crystal display panel is provided approximately in the center of the case. . A display device further comprising a drive control circuit for controlling a drive circuit of a liquid crystal display panel within the case. (2) The display device according to claim 1, wherein the light diffusing member is a flat diffusing plate. (3) The display device according to claim 1, wherein the light diffusing member is a lens.