JPS607465A - Illuminator for liquid crystal tv - 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] Conventionally, light sources such as electroluminescence (hereinafter referred to as EL) have been used.
The lighting system for LCD TVs using the so-called half-mirror
It has a structure in which it is set between the EL panel and the polarizing plate. FIG. 1 is a sectional view showing the structure of a display section of a liquid crystal television equipped with a conventional lighting device. In Figure 1, 11 is a display unit, 12 is a half mirror, and 116 is an EL panel. Images can be viewed by using the half mirror 12 in bright places and by lighting up the EL panel 16 in dark places. can. However, the transparency of the no-f mirror is about 30 to 50%, and its properties as a reflector and the illumination properties of the EL itself are considerably degraded.

The present invention relates to a lighting device for a liquid crystal television set intended to improve the above-mentioned drawbacks. The sign of <7B construction is formed by the illumination device EL etc. yC blood and the foul surface, and if the surrounding light is dark, EL etc. -)'
6'/#, facing up, or for knots/tables with bright ambient light, with the reflective side facing up, and freely flip and replace them.'
Furthermore, when using an e-source such as EL lighting, a switching tM eW is also configured in which the C1 source lights up simultaneously when the light source is inserted with the light source facing upward.

Hereinafter, a detailed explanation of the present invention will be given using page 171.

FIG. 2 is a perspective view showing the appearance of a liquid crystal television that is an embodiment of the present invention. In FIG. 2, 21 is a display screen, and 22 is an inlet for inserting and removing a lighting device that integrates an EL panel and a reflector, and is configured so that it can be positioned at the bottom of the display screen 21. . FIG. 3 is a [θ] view showing a state in which the H(4-bright device) of the liquid crystal television of the present invention is inserted into the lower part of the display screen. In FIG. , 66 is an EL panel. Fig. 3 shows a case where the display screen of a liquid crystal television is viewed in a place with bright ambient light, and the display unit 31 is illuminated by the light reflected from the reflector plate 62. Ambient light When viewing the display screen of an LCD TV in a dark place, the reflector 62 and EL shown in FIG.
The integrated panel 66 is used by turning it upside down and inserting it. Figure 4 is a cross-sectional view showing the state, and 41
42 is an EL panel, and 46 is a reflective plate. By applying several tens of square meters of voltage to the EL panel 42, the display section 41 can be illuminated from the rear, making it possible to view the display screen even in places with poor ambient light. Furthermore, as shown in Fig. 4, with the EL panel 42 facing upward, insert the integrated EL panel 42 and reflector 46, and at the same time, switch the EL panel 42 to turn on (some parts are covered). Figure 5 shows an illumination device of the present invention in which an EL panel and a reflector are integrated.
51 is a notch, 52 is an EI panel, 56 is a reflective plate, 54 is a →j1 pattern, and 55 is a ground. When using an LCD TV in a place where the ambient light is dark, by inserting the EL panel 52 into the socket 22 shown in Figure 21gl with the EL panel 52 on the top, conduction is established through the conductive pattern 54, and the EL panel 52 emits light. The mechanism is to do so. Figure 6 is a F view showing the appearance of the illumination device of the present invention shown in Figure 5 with the reflector on the top, 61 is a notch, 62 is a reflector, 66 is an E L panel, 64 is a 4-letter pattern, 65
is earth. With the reflector on the top as shown in Figure 6 1-? When inserted into the slot 22 shown in 21gl, conduction is not established by the notch 1 61 and the EL panel 66 is emitted.

do not have. Grounds 55 and 65 in FIGS. 5 and 6 are positioned in parallel on the upper and lower surfaces, and are connected to the ground when inserted into the insertion port 22. Figure Makoto 7 shows 4 of the lighting device of the present invention explained in Figure 5 and Figure 6.
FIG. 4 is a plan view of the main part of the through-pattern contact ip, showing a case where a leaf spring is used in one embodiment of the contact point ip. In Fig. 7, 71 is a conductive pattern, 72 is a leaf spring, 73 is a ground, and 74 is a notch. leaf spring 7
2, a voltage is applied to the EL panel and it emits light. Fig. 8 is a plan view of the main parts showing the state shown in Fig. 7, inverted and inserted with the reflective plate facing upward; 81 is a conductive pattern, 82 is a leaf spring, 86 is a ground, and 84 is the incision. When inserted into the insertion port 22 in the state shown in FIG. 8, the plate spring 82 is not pressed by the notch 84, the four conductive patterns 81 are not removed, and the EL panel does not emit light. Figure 9 is silk 71me1
, is a plan view of essential parts showing an embodiment in which a coil spring is used instead of the root spring in FIG. 8, 91 is 44 patterns, 92 is a coil spring; 1-193 is a ground, and 94 is a notch. The state shown in FIG. 9 shows the case where the EL panel is inserted with the top surface, and the coil spring 92 is pressed and the conduction pattern 91 is made conductive. Similar] 01-1 is obtained by inverting the illumination device from the states i, ', and 'j in Figure 9, and placing the reflector on the top surface, i! 1 is a plan view of the main part showing the case where it is inserted, 1 [J i & i conductor jl11 pattern, 102 is a coil spring, 103 is a ground, 104 is a notch. The coil spring 102 is not pushed by the notch 104, and the conductive pattern 101 is not bent. In other words, when using the reflector as the top surface, the IBL panel will not emit light.

As explained above in Group A4111K, the light device is equipped with an outlet in the main body of the LCD TV, and when the Ll is inserted, the E
If the L panel and anti-I/J board are integrated, it can be freely reversed and replaced.If the surroundings are bright, the EL panel should not emit light with the reflector on top, and 14. 'l
If you need E L light, select E L
Insert the EL panel with the panel facing up.
It's something to stir.

FIG. 11 is a perspective view showing the appearance of another embodiment of the liquid crystal television of the present invention. In Figure 11, 111 is an insertion port, 112 is a display section, and 116 is an insertion port, and a reflective plate is inserted into the insertion ports 111 and 116.

FIG. 12 is a cut-away diagram showing the configuration of the illumination device of the embodiment shown in FIG. 11, in which 121 is an outlet, 122 is an EL panel (see-through), and 123 is an outlet. That is,
The EL panel 122 is fixed, and when the ambient light is bright, a reflector is inserted into the socket 121, and when the surrounding area is dark, the reflector is inserted into the socket 126. Similar to the embodiment described above, a reflector or an EL panel that emits light is used depending on the brightness of the surrounding light.

In the above embodiments, an EL panel is used as the light source, but the EL panel may be replaced by another light source such as a light emitting diode or a fluorescent tube.

As mentioned above, the present invention uses a reflector or a light source according to the brightness of the surrounding light, and when the JM 1#41 light is bright, it can be used in comparison with the conventional l, j, bright device. It is possible to use a reflector with better performance than that of a humirar, and also) Figure 11 is dark (・
In some cases, it will be possible to provide more illumination than when using a conventional lighting device.Furthermore, when using a light source such as EL, the light source such as an EL panel will be emitted by simply placing the light source above the counter board. The present invention has excellent performance as a lighting device for LCD televisions, and has the great effect of being easy to operate. Yes
1".

[Brief explanation of the drawing]

Hehe Figure 1 shows the configuration of a conventional LCD TV lighting device.
- Cross-sectional view, from Fig. 2, Fig. 10 shows the -6-no. The figure is a top view of the illumination device (1 showing h configuration), Figure N45, and Figure 6 is a perspective view showing the configuration of the illumination device.
7 and 8 are plan views of main parts showing a switching mechanism of a lighting device using a leaf spring, Figures 91 and 10 show a switching mechanism of a lighting device R using a coil spring.
A plan view of the main parts, FIG. 11, 121 and 12 show other embodiments of the present invention, FIG. 11 is a perspective view showing the outside of the liquid crystal television, and FIG. 32 is a sectional view showing the configuration of the lighting device. It is. 11.21.61.41.112...display section, 12.
... Half mirror 1 16, 6?3, 42, 52, 6 6,
1 22...EL nooknel, 22.111.116.121.126...Inlet, 62.46.56.62...Reflector, 51.61.7
4.84.94.104...Notch, 54.64.71.81.91,ioi...Continuity turn, 55,65,76,86,96,103...Earth,
72.82...Plate spring, ) Figure 1 Figure 2 Figure 5 Figure 6 Figure 11 Figure 12 371

Claims (1)

[Scope of Claims] (]) In a lighting device for a liquid crystal television that has a light source and a reflector, the vertical positions of the light source and the reflector can be replaced as necessary, and the light source or the reflector A lighting device for a liquid crystal television, characterized by having a switching mechanism that turns on and off a light source by changing the top and bottom positions of a board. (2) The lighting device for a liquid crystal television set according to claim 1, wherein the -ffi source is electroluminescence.