JPS6281687A - Plane color display unit - 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 [Industrial Field of Application] This defense relates to a small, inexpensive, high-resolution planar force display device.

[Conventional technology]

This will be explained using the conventional device 1Y drawing (Reference
Haaebe etal A Full-Color
FieldSeqwntial L CD Usi
ng Modulated Backlight “1
985 SID International
Symposium Digest of Tech
nical Papers, Mo1e IL
81-83).

FIG. 8(a) shows an example of the configuration of a conventional device of this type. In this figure, 10, 20, and 30 are respectively red (R
), CRT with 3a original colors of edge (G) and t (B), 40
50 is an original fiber, 50 is an original diffuser, and 60 is a transmission type liquid crystal display panel. An enlarged view of At1i is shown in Figure 8 (b
). The transmissive liquid crystal display panel 60 is formed by narrowing the liquid crystal to form a transparent matrix on the front and back sides, and the transmittance of selected coordinate points changes to form an m image.

Figure 9 is an operation timing chart of the device in Figure m8, and T
Are a, To, and Ta lit? ! The operation will be explained using Figures 8(a), (b), and 9, which show the Ill 1I41 signal. First, the red color is transmitted through the light diffusing plate 50 to the transmissive liquid crystal display. The information is sent to the display panel 60 and the transparency rate of each pixel is controlled according to the one-stroke information. In other words, the transmissive liquid crystal display panel 60 functions as a main shutter that controls the amount of light passing through the back.

When the transmittance of each pixel is stable, the red CRT1O
I'll give you YM money. The light from the red CRT1θ is optical fiber 4.
0 to the 1FIij direction of the light diffusing plate 50.

It is reflected by the original diffuser 50 and enters the transmissive liquid crystal display panel 60.The transmissive liquid crystal display panel 60 controls the transmittance of each pixel according to the red screen information, so The red light will pass through the transmissive liquid crystal display panel 60, and a red tdll@ will be displayed.
Then, the screen information of green and 'W is sequentially sent to the transmissive liquid crystal display panel 60 and the same operation is performed to display one screen in full color. Here, the transmission type liquid crystal display panel 60
to obtain sufficient display goods'x.

An active filter with a thin film transistor that can reduce the contrast is used.

[Problem that the invention seeks to solve]

This device has the advantage of being more powerful than devices that display color by applying a color filter to each pixel, but it is not suitable for the unique CRTl 0.20°30 or the rough shape. Since the original fiber 40 is used, it is expensive, and the space for accommodating the old CRTI O, 20, 30 and the original FFIHA 40Y is public expense outside the transmissive liquid crystal display panel 60, and the entire device becomes a shadow. There were drawbacks.

SUMMARY OF THE INVENTION An object of the present invention is to provide a small flat-panel display device which solves the disadvantage of the large size of such devices.

[Means for solving problems]

A first aspect of the present invention is a device in which a plurality of light-sensing layers, each of which emits light in one of the three primary colors, and whose luminous colors differ from each other, are laminated between transparent electrodes.

A thinly engineered luminescent panel.

I shouldered the transmissive liquid crystal display panel placed facing the illumination.

Furthermore, it is equipped with an Itllm circuit that controls the entire YflilJ.

Further, in a second invention according to the invention K, each of the optical layers in the first invention is constructed by combining separate thin luminescence panels and luminescence panels.

Furthermore, the third invention according to the present invention is a diffused ft, source that emits light in any of the father light colors of the plurality of thin films in the second invention. It has been replaced.

[Effect]

The first to third inventions according to this invention are all
Each father light color is switched by a control circuit and applied to a transmissive liquid crystal display panel every time field II field is scanned, resulting in a flat color display.

〔Example〕

FIG. 1 is a diagram illustrating a first embodiment of the present invention, in which 60 is a dove-shaped liquid crystal display panel, and 7 is a thin film electroluminescent display panel.

Figure 2 shows the town of thin film luminescence panel 7 in Figure 1! ll enlarged diagram and circuit diagram of Dra 47, 70 is a transparent substrate of thin film processing/pluminescence panel T, 71, 72, and 73 are (R) and green (
G), ! (B) 7m thin film with 3 or 9 corpses, T4
75, 76, 77, 78 are transparent insulating layer thin films, 75, 76, 77, 78 are transparent "a"
Others are thin glands.

Thin film process V chrominescence panel 7 is a transparent substrate 70 K
AThin film formation methods such as nitrogen evaporation and sputtering
It has an in' structure.

To operate this, a lighting (light emission) control signal Ta is used to switch the light emission color every time the screen field is scanned according to the timing chart shown in FIG.

TG, T11'! l” input to the drive circuit 81.T
When the R=ON signal is input, the drive circuit 81 applies an AC pulse voltage χ between the transparent electrode thin films 75 and 76 (
(state shown in FIG. 2). As a result, the light-emitting layer thin film 71 is again exposed to a flowing field and emits red light.

Similarly, when TO-ON, transparent 'Ka thin 1111
An AC pulse voltage is applied between 76° and 770°, and the 9th layer film T2 turns green. Furthermore, when Tn=ON, the luminescent pigeon IV membrane 73 emits light in the evening. In this way, i[k
For each song field scan, the emitted light color changes dramatically and enters the transmissive liquid crystal display panel 60. On the other hand, the transmittance of each pixel on the transmissive liquid crystal display panel 60 is controlled based on screen information. Then, the seven red, green, and yellow VJJJ sides are displayed in field order, and as a result, a color screen is displayed.

Light emitting 1m thin film 71 72.73 is 1 example ZnS:S
mF3, ZnS: TbF3, ZnS
: TmF3 Use and apply in hot weather. As these are almost transparent.

There is no problem for light to pass through. Further, the transparent electrode thin film T8 on the side after scanning is not necessarily transparent, and it goes without saying that it may be a metal electrode.

FIG. 3 is an explanatory diagram of the 20th embodiment of the invention between the lights, in which 60 is a transmission type electroluminescent display panel, 91 is a thin film of MA, and 92 is a green panel. Luminescent thin film electroluminescent panel, 93 iIr
Kaimoto 0 Enmeiko/Ctroluminescence Panel Al.

FIG. 4 is an enlarged view of the wT song of each thin film electroluminescent panel 91, 92, and 93 in the third layer, and 910
, 920, 930 are transparent substrates, 911° 915.921
．． 925,931.935 is transparent ia ultra-thin film, 912,
914, 922, 924, 932゜934 is an absolute M-layer thin film, 913 is a red-emitting button nine-layer thin film, 923 is a green-emitting button f
t, thinning film, 933 is "Pt labor light 0 original pigeon thin film, 82.
83 and 84 are drive circuits for a red light emitting thin film electroluminescent panel 91, a green light emitting thin film electroluminescent panel 92, and an evening light emitting thin film electroluminescent panel 93, respectively.

To operate this, the lighting control signals TB, Ta+Ta, and drive circuits 82, 83, and 84 are manually inputted to switch the luminescent color every time the screen field is scanned according to the timing chart shown in FIG.

When the Ta-0N signal is input manually, an AC pulse pressure is applied by the drive circuit 82 to the thin film electroluminescent panel 91 of reddish e light, and it emits a reddish red light. Similarly, when Ta = ON, #CC99 thin film 2Vri1-c
- Luminescence panel 92 or l & i original, 'l',=
When it is ON, the 93 thin film filter 93 emits light at night. In this way, the color of the light changes sequentially as the screen field moves, and the light enters the transparent mausoleum-shaped liquid crystal display panel 60. However, a color screen is displayed as in the first embodiment.

, 2 and 5 are explanatory diagrams of the third light-emitting embodiment according to the present invention, in which 60 is a transmissive liquid crystal display panel, 91 is a red-colored thin film electroluminescent panel, and 92 is a green light-emitting thin film. The electroluminescent panel 94 is a transparent diffuser, and 95 is a linear cold cathode mercury fluorescent tube.

FIG. 6 is an enlarged sectional view of the S section of FIG. 5, and is 910°9
20 is a transparent substrate, 911, 915, 921, 925 is a transparent NJJ11L ultra-thin film, 812, 914, 922, 924
913 is the insulating layer thin film, 923 is the light-emitting l-thin film of Akane-Yu.
82 and 83 are the drive circuits of the green-emitting thin-film electroluminescent panel 91 and the green-emitting thin-film electroluminescent panel 92, respectively. Reference numeral 85 is a drive circuit for the blue light-emitting linear cold-yin-other-water-reduction*former official 95.

FIG. 7 is a connection diagram of the blue light nine-shaped cold shade water light v95 and the drive (b) approximately 85 in the first embodiment,
96 is a brightness adjustment resistor.

In order to operate this, drive circuits 82, 83, 82, 83, 82, 83, 82, 82, 83, 70, 82, 83, 82, 83, 82, 83, 83, 60, 60, 90, 100, 100, 100, 200, 200, 200, etc., respectively, are supplied with lighting control signals Ta, Ta, and Tmt% for switching the luminescent color every time the screen field is scanned according to the timing chart shown in FIG. '85. And the first.
Similarly to the embodiment of the second invention, the red-emitting thin film nick troluminescence panel 91 emits light at TR-ON, and the T
When o=ON, the sa luminescence panel 92 on the edge xA+ emits light, and when Ta-0N, the blue-emitting grade cold cathode water iron fluorescent tube 95 emits light. The light emitted by this "W kogen tonaga-shaped cooled mercury pyrogen v95 enters the transparent diffuser plate 94,
Here, the scattering becomes a spatially uniform source and goes out in all directions (. In this way, the emitted light color changes sequentially for each screen field scan, and enters the !4-type enemy crystal display panel 60. - Transparent liquid 1 display panel 60 according to surface information
The transmittance of each upper pixel is controlled, resulting in a color screen being displayed.・Note that 3 in the thin film nicktroluminescence panel 7 shown in FIG. 2 above is replaced by the light layer thin film 71.
The stacking IvLF+ of ~T3 may be in other orders. Also, the thin film electroluminescent panels 91-93 in FIG. 3 may be powered in other orders as well.

Further, in the embodiment shown in FIG. 6, the linear cold cathode mercury fluorescence 'f95Y is used for blue light emission, but it may be used for light emission of other colors.

〔Effect of the invention〕

This invention K The first invention is a thin-film type luminescent device in which a plurality of xA original light layers are laminated between transparent electrodes, each of which emits light in one of three primary colors, and which emit light in different colors. Since it is equipped with a sense panel, a transmissive liquid crystal display panel placed in front of it, and a control circuit that controls the entire system, it can be constructed thinly and can be used as a color television receiver. It is possible to manufacture JN-type devices for use in information display terminals, etc.

Further, in the second aspect of the present invention, since each light emitting layer is a separate thin film electroluminescent panel, it is possible to partially tear and replace the panel.

Moreover, the third invention according to this invention is
Since the diffusion bowl corresponds to the t-layer, strong light emission can be obtained, and there are advantages such as the ability to have the same brightness as each light-emitting layer in front even if an @ structure is inserted in the middle.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the overall configuration of a first embodiment of the present invention, FIG. 2 is an enlarged partial cross-sectional view of FIG. 1 and a diagram showing its drive circuit, and FIG. 2 is a perspective view showing the overall configuration of the embodiment of the invention, and FIG. 4 is an enlarged partial sectional view of FIG. 3 and its drive times +! 8, FIG. 5 is a perspective view showing the overall configuration of the third embodiment of the present invention,
Figure g6 is an enlarged partial sectional view of Figure 5 and its drive circuit, Figure 7 is a partial wiring diagram of Figure 6, and Figure 8 (a). (b) is a perspective view showing the configuration of a conventional flat (3) color display device using a CRT as a back light source, and an enlarged view of its A area, and FIG. 9 is a timing common to the conventional device and the device of this invention. It is a chart. In the figure, 50 is light scattering 5, and 60 is 'i! In the i-type liquid crystal display panel, the lighting control signal for the red light source, TG is the lighting control signal for the green light source, Ta is the lighting control value number for the *light source, 70 is the transparent substrate, and 71, 72, and 73 are the light emitting layer thin films. , 74 is a transparent insulating thin film, 75, 76.7778 is a transparent battery thin film, 81 is a drive circuit, 91 is a red 'A-yt' thin film electroluminescence panel, 92 is a green-VA light W# film work. Troluminescence panel, 93 is J'rt luminescence thin film nick)R luminescence panel, 910,920.9
30 is a transparent substrate, 911.915, 921, 925, 9
31.935 is a transparent electrode thin film, 912,914,922
,924゜932.934 is an insulating layer thin film, 913 is a red light emitting 'th light m? I film, 923 c#'A light f)'
A light/Zengbo U933 is a blue light emitting I-thin film, 82 is a red light emitting thin film nicktroluminescence panel drive 1gl, 83 is a green light emitting thin film nicktroluminescence panel drive circuit, 84 is on a blue-emitting thin film)
a Dry 7 circuit of the luminescence panel, 85 is the drive circuit of the cold cathode liquid fluorescent tube in the form of a rim, 94 is the transparent scattering plate, 95 is the linear cold yin mercury fluorescent tube of the t source, 96 is the blue It is a resistor for true knots. 'i:p! Figure 3 Figure 1 Figure 4 Figure 5 Biko Soko Soko Soko Figure 6 Figure 7 Figure 8 Cλ) Figure 9

Claims (3)

[Claims] (1) Each emits light in one of the three primary colors,
The thin film electroluminescent panel has a thin film electroluminescent panel in which a plurality of light emitting layers of different luminescent colors are laminated between transparent electrodes, and a transmissive liquid crystal display panel placed in front of the panel, and the thin film electroluminescent panel has a transmissive liquid crystal display panel placed in front of the panel, and the thin film electroluminescent panel is formed by stacking a plurality of light emitting layers of different luminescent colors between transparent electrodes. A flat color display device characterized by comprising a control circuit that switches and lights up one of the light emitting layers of a luminescent panel and changes the emitted color in field sequential order. (2) a plurality of thin-film electroluminescent panels stacked on top of each other, each having a plurality of thin-film electroluminescent panels stacked on top of each other, each having a plurality of light-emitting layers that emit light in one of three primary colors and having different light-emitting colors; It has a transmissive liquid crystal display panel placed in front of a plurality of thin-film electroluminescent panels, and furthermore, one of the plurality of thin-film electroluminescent panels is switched on and turned on each time the screen field is scanned, and the emitted light color is changed sequentially in the field. A flat color display device characterized by comprising a control circuit for changing the color. (3) A plurality of thin film electroluminescent panels stacked on top of each other, each having a luminescent layer that emits light in one of the three primary colors, which is laminated between transparent electrodes, and which emit light in different colors. A diffused light source that emits light in one of three primary colors is placed behind the diffused light source, and a transmissive liquid crystal display panel is placed in front of the diffused light source that emits light in one of the three primary colors, and each of the plurality of thin film electroluminescent panels is scanned for each screen field scan. 1. A flat color display device characterized by comprising a control circuit that switches and lights up one of the diffused light sources or the rear diffused light source and changes the emitted light color sequentially in the field.