CN101163358B - Display device - Google Patents

Abstract

The invention relates to a display device, comprising an OLED display device and at least one OLED light-emitting device, wherein the OLED light-emitting device is superimposed on the light-emitting side of the OLED display device, and serves as a backlight source of the OLED display device. Wherein the OLED display device comprises a substrate and a first electrode, an organic functional layer and a second electrode sequentially formed on the substrate, wherein at least one of the first electrodes adjacent to the substrate has a light reflection function, and the second electrode is a transparent electrode The OLED light-emitting device comprises a transparent substrate and a first transparent electrode, an organic functional layer and a second transparent electrode formed sequentially on the transparent substrate, wherein the second transparent electrode is close to the light-emitting side of the OLED display device, and the OLED display device The substrate serves as a packaging sheet for the OLED light-emitting device, and the substrate of the OLED light-emitting device serves as a packaging sheet for the OLED display device.

Description

a display device

technical field

The invention relates to the field of organic electroluminescence, in particular to an organic electroluminescence display device with improved special display effect.

Background technique

OLED is a self-luminous display device, including a transparent cathode, an organic functional layer and a reflective electrode. Due to the existence of reflective electrodes, the readability of the display device is greatly reduced in places with strong ambient light, which leads to a decrease in display contrast. In order to increase the contrast of the display device, an anti-glare film can be added to the surface of the display body, but the anti-glare film The increase will cause the brightness of the display device to decrease. In addition, the anti-glare film makes the screen appear black, which gives people a sense of sudden change during display, and makes the viewer prone to visual fatigue when reading the displayed content.

The applicant disclosed a laminated organic electroluminescent device in the patent application No. 200610144291.7, which is to stack the first organic electroluminescent device and at least one second organic electroluminescent device in a specific way, and The OLED light-emitting device obtained by selecting the electrode material and the light-emitting material can increase the amount of light output and the intensity of light emission, and can realize multiple colors at the same time, with adjustable chromaticity, and does not require separate packaging between different light-emitting devices , through the mutual encapsulation of the substrates, the preparation process is simplified.

According to the structural design of the laminated light-emitting device, a laminated display device with improved display contrast and readability can be realized on this basis.

Technical solutions

The object of the present invention is to provide an OLED display device which improves display brightness and contrast, increases visual comfort, and has a simple manufacturing process.

Above-mentioned purpose of the present invention is achieved by following technical scheme:

A display device includes an OLED display device and at least one OLED light-emitting device, wherein the OLED light-emitting device is superimposed on the light-emitting side of the OLED display device and serves as a backlight source for the OLED display device.

In the above display device, the OLED display device includes a substrate and a first electrode, an organic functional layer and a second electrode sequentially formed on the substrate, wherein at least one of the substrate and the first electrode adjacent to the substrate has a light reflection function, and the second The second electrode is a transparent electrode; the OLED light-emitting device includes a transparent substrate and a first transparent electrode, an organic functional layer and a second transparent electrode sequentially formed on the transparent substrate, wherein the second transparent electrode is close to the light-emitting side of the OLED display device.

In the above display device, the substrate of the OLED display device is used as a packaging sheet of the OLED light emitting device, and the substrate of the OLED light emitting device is used as a packaging sheet of the OLED display device, and the two are mutually packaged.

In the above display device, the OLED display device is a blue light device, and at least one OLED light emitting device is a yellow light device.

In the above display device, the OLED display device is a yellow light device, and the at least one OLED light emitting device is a blue light device.

In the above display device, the OLED light-emitting device includes a first light-emitting device and a second light-emitting device, which are respectively superimposed on both sides of the OLED display device, wherein the OLED display device includes top-emitting devices and bottom-emitting devices arranged at intervals thereon. device, so that the light emitted by the OLED display device is superimposed with the light emitted by the first light emitting device and the second light emitting device on both sides respectively, and then emitted.

In the above display device, the first light emitting device and the second light emitting device are blue light devices, and the OLED display device is a yellow light device.

In the above display device, the first light emitting device and the second light emitting device are yellow light devices, and the OLED display device is a blue light device.

In the above display device, the top emission device sequentially includes a substrate, a transparent anode, a reflective layer, an organic functional layer and a transparent cathode, and the bottom emission device sequentially includes a substrate, a transparent anode, an organic functional layer and a reflective cathode.

In the above display device, the substrate of the OLED display device is used as the packaging sheet of the first light emitting device and the second light emitting device, and the substrate of the first light emitting device or the second light emitting device is used as the packaging sheet of the OLED display device

In the above display device, the OLED display device and the substrate of the OLED light-emitting device are connected through encapsulation glue to realize the encapsulation of the display device.

By adopting the above-mentioned technical scheme, the present invention superimposes the OLED display device and at least one OLED light-emitting device in a specific way, and selects the electrode material and the material of the light-emitting layer, thereby obtaining an OLED display device with improved display effect, simplifying the preparation At the same time as the process, a display device that realizes double-sided display is also obtained by improving the device structure.

Description of drawings

Figure 1 is a structural diagram of an OLED display device that realizes white characters on a blue background according to the present invention

111 OLED yellow light display device substrate, 112 OLED yellow light display device reflective anode, 113 OLED yellow light display device transparent cathode, 114 OLED yellow light display device organic functional layer, 115 OLED yellow light display device isolation column, 121 OLED blue light emitting device Substrate, 122 OLED blue light emitting device transparent anode, 123 OLED blue light emitting device transparent cathode, 124 OLED blue light emitting device organic functional layer, 01 desiccant, 02 packaging glue

Fig. 2 The structure diagram of the OLED display device that realizes the display of white characters on a yellow background according to the present invention

211 OLED blue light display device substrate, 212 OLED blue light display device reflective anode, 213 OLED blue light display device transparent cathode, 214 OLED blue light display device organic functional layer, 215 OLED blue light display device isolation column, 221 OLED yellow light emitting device substrate, 222 OLED Transparent anode of yellow light emitting device, transparent cathode of 223 OLED yellow light emitting device, organic functional layer of 224 OLED yellow light emitting device, 01 desiccant, 02 packaging glue

Figure 3 is a structural diagram of an OLED display device that realizes double-sided display of blue background and white characters according to the present invention

311 OLED yellow light display device substrate, 312 OLED yellow light display device transparent anode, 313 OLED yellow light display device organic functional layer (bottom emission pixel), 314 OLED yellow light display device reflective cathode (bottom emission pixel), 315 OLED yellow light display device Display device reflective layer (top emission pixel), 316 OLED yellow light display device organic functional layer (top emission pixel), 317 OLED yellow light display device transparent cathode 318 OLED yellow light display device isolation column, 321 OLED first blue light emitting device substrate , 322 OLED first blue light emitting device transparent anode, 323 OLED first blue light emitting device transparent cathode, 324 OLED first blue light emitting device organic functional layer, 331 OLED second blue light emitting device substrate, 332 OLED second blue light emitting device transparent anode , 333 OLED second blue light emitting device transparent cathode, 334 OLED second blue light emitting device organic functional layer, 01 desiccant, 02 packaging glue

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example 1

As shown in Figure 1, it is a structural diagram of an OLED display device that realizes white characters on a blue background according to the present invention. A reflective anode 112, a transparent cathode 113, an organic functional layer 114 and a spacer 115 are arranged in order on top of it, and the OLED blue light emitting device includes a substrate 121, and a transparent anode 122, a transparent cathode 123 and an organic functional layer 124 arranged in sequence on the substrate 121, The OLED yellow light display device and the blue light emitting device are connected through encapsulation glue 02, wherein the substrate 111 of the yellow light display device is used as the encapsulation sheet of the blue light light emitting device, and the substrate 121 of the blue light light emitting device is used as the encapsulation sheet of the yellow light display device. They are mutually encapsulated, and a desiccant 01 is provided inside the display device.

The anode 122 and cathode 123 of the blue light-emitting device are both transparent electrodes, and the light is emitted from both sides. The light emitted from one side of the cathode 123 passes through the yellow light display device, and is reflected by the reflective anode 112 to be compared with the light emitted from the other side. The superposition is emitted from the direction indicated by the arrow in Figure 1, thereby obtaining blue light with significantly enhanced brightness. The light emitted by each pixel of the yellow light display device and the light emitted by the blue light emitting device are superimposed to produce white light, which is emitted from the direction indicated by the arrow in Figure 1, which can be To realize white character display, due to the reflection effect, the background color of blue light and the brightness of white characters are greatly enhanced, which not only improves the display effect and readability, but also increases the display contrast. In addition, the two devices are packaged with each other through the substrate, eliminating the need for The step of using the packaging sheet for packaging is eliminated, which simplifies the process while saving the manufacturing cost.

In addition to displaying Chinese characters, the display device can also display monochromatic patterns as required.

Example 2

Fig. 2 is a structural diagram of the OLED display device of the present invention that realizes the display of white characters on a yellow background. The difference from Embodiment 1 is that in the display device of this embodiment, the display device is a blue light device, the light emitting device is a yellow light device, and the two devices are superimposed Finally, the display effect of white characters on a yellow background with enhanced display brightness and contrast is realized.

Example 3

As shown in Figure 3, it is a structural diagram of an OLED display device for realizing double-sided display of white characters on a blue background according to the present invention. The two sides of the yellow light display device are stacked to form a double-sided display device. On the transparent substrate 311 of the yellow light display device, a transparent anode 312, an organic functional layer and a cathode in which bottom-emitting pixels and top-emitting pixels are alternately arranged are arranged in sequence, wherein a reflective cathode 314 is arranged on the bottom-emitting organic functional layer 313, so that the device is formed from the bottom. To emit light, a transparent cathode 317 is arranged on the top-emitting organic functional layer 316 arranged at intervals, and a reflective layer 315 is also provided between the light-emitting layer 316 and the anode 312, so that the device emits light from the top, and there are spacers 318 on the anode 312 , the two sides of the yellow light display device are stacked with a first blue light emitting device and a second blue light emitting device respectively, the first blue light emitting device includes a substrate 321, a transparent anode 322 arranged in sequence, a transparent cathode 323, an organic functional layer 324, and a second blue light emitting device The light-emitting device includes a substrate 331, a transparent anode 332, a transparent cathode 333 and an organic functional layer 334. Both the first and second blue light-emitting devices are bottom-emitting, and the light emitted from the top is reflected by the reflective cathode 314 or the reflective layer 315. The direction is changed from the bottom As shown by the arrow in Figure 3, the luminous brightness of the blue light is enhanced. At the same time, the light emitted alternately by the top-emitting pixels and the bottom-emitting pixels of the yellow light display device is respectively superimposed with the blue light on both sides and then emits white light, thereby realizing the double-color display of white characters on a blue background. The effect displayed on the screen.

The yellow light display device is connected with the first and second blue light emitting devices through packaging glue 02, and a desiccant 01 is provided inside the device, wherein the substrate 321 of the first blue light emitting device is used as the packaging sheet of the yellow light display device, and the yellow light display The substrate 311 of the device is used as the packaging sheet of the two blue light emitting devices, which are mutually packaged, which saves a separate packaging step and simplifies the process.

The device structure design of this embodiment enables the double-sided display device with white characters on a blue background to have a display effect that improves contrast and brightness, and enhances readability. In addition, the display of white patterns on a blue background can also be realized as required.

Example 4

Similarly, when the display device is a yellow light device, and the first and second light emitting devices are blue light devices, a double-sided display device with white characters on a yellow background can be obtained, and its device structure and principle are the same as those in Embodiment 3.

Claims (8)

1. display unit; Comprise OLED display device and at least one OLED luminescent device, what wherein the OLED luminescent device was superimposed upon the OLED display device sends light one side, and as the backlight of OLED display device; Said display device also comprises insulated column; The substrate of said OLED display device is as the case chip of OLED luminescent device, and the substrate of said OLED luminescent device is as the case chip of OLED display device

Said OLED display device comprises substrate and is formed on first electrode, organic function layer and second electrode on the substrate successively, and one of them has the light reflection function to first electrode that wherein substrate and substrate are adjacent at least, and second electrode is a transparency electrode; Said OLED luminescent device comprises transparency carrier and is formed on first transparency electrode, organic function layer and second transparency electrode on the transparency carrier successively, and wherein second transparency electrode is sent light one side near said OLED display device.

2. according to the display unit of claim 1, it is characterized in that said OLED display device is a blue-light device, said at least one OLED luminescent device is the gold-tinted device.

3. according to the display unit of claim 1, it is characterized in that said OLED display device is the gold-tinted device, said at least one OLED luminescent device is a blue-light device.

4. display unit; Comprise OLED display device and at least one OLED luminescent device; What wherein the OLED luminescent device was superimposed upon the OLED display device sends light one side, and as the backlight of OLED display device, said display device also comprises insulated column; The substrate of said OLED display device is as the case chip of OLED luminescent device; The substrate of said OLED luminescent device is as the case chip of OLED display device, and said OLED luminescent device comprises first luminescent device and second luminescent device, is superimposed upon the both sides of said OLED display device respectively; Wherein the OLED display device comprises on it spaced top ballistic device and end ballistic device of position, penetrates after the optical superposition that makes light that the OLED display device sends send with first luminescent device and second luminescent device of both sides respectively.

5. according to the display unit of claim 4; It is characterized in that said top ballistic device comprises substrate, transparent anode, reflector, organic function layer and transparent cathode successively, ballistic device of the said end comprises substrate, transparent anode, organic function layer and reflective cathode successively.

6. according to the display unit of claim 4 or 5, it is characterized in that said first luminescent device and second luminescent device are blue-light device, said OLED display device is the gold-tinted device.

7. according to the display unit of claim 4 or 5, it is characterized in that said first luminescent device and second luminescent device are the gold-tinted device, said OLED display device is a blue-light device.

8. according to the display unit of claim 4 or 5; It is characterized in that the case chip of the substrate of said OLED display device as first luminescent device and second luminescent device, the substrate of said first luminescent device or second luminescent device is as the case chip of OLED display device.

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