CN104020602B

CN104020602B - Display device

Info

Publication number: CN104020602B
Application number: CN201410249889.7A
Authority: CN
Inventors: 蒋顺; 孙润光
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-06-09
Filing date: 2014-06-09
Publication date: 2024-04-05
Anticipated expiration: 2034-06-09
Also published as: CN104020602A

Abstract

The invention provides a display device which can be used freely indoors and outdoors, wherein OLED (organic light emitting diode) display is used as a main display, the color is bright, the display effect is good, and a total reflection type liquid crystal display mode is used as a main display when outdoors, so that the display device which can be used freely indoors and outdoors is realized.

Description

Display device

Technical Field

The invention relates to a display device which can be used in indoor and outdoor.

Background

AMOLED display technology is gradually becoming a powerful competitor in the next generation display technology field due to the characteristics of high chromaticity domain, high response speed, lighter weight and thinner weight and the like, and the AMOLED display technology is currently replacing LCD technology.

At present, most of cover glass of mobile display equipment has higher reflectivity, low contrast ratio of effective display in an outdoor environment and cannot be directly and freely used in the outdoor environment.

The transflective LCD can be used for outdoor and indoor display, but the reflective part occupies the aperture ratio, so the power consumption is relatively large. In addition, the half-reflection and half-transmission mode is mainly a VA mode, is difficult to realize on high PPI products, and has low yield, complex process, high cost and other reasons, so that the technology is not mainstream.

Disclosure of Invention

The invention provides a display device combining an LCD and an OLED; the lower substrate is an OLED display substrate, the structure of the lower substrate is a top emission structure, the lower electrode of the OLED is provided with reflective metal, and OLED pixels emit light upwards when in operation; the upper substrate is an LCD pixel unit, an alignment layer is arranged on at least one side of the inner surfaces of the upper substrate and the lower substrate, a liquid crystal layer is arranged between the upper substrate and the lower substrate, and the orientation of the liquid crystal is controlled by the alignment layer and the electric field of the LCD pixel unit. When in the indoor mode, the OLED device works, the emitted light is unpolarized light, and the liquid crystal layer has no influence on the display state of the OLED. When in an outdoor mode, the ambient light is changed into polarized light firstly, then passes through the liquid crystal layer after being reflected by metal, passes through the liquid crystal layer again, and is subjected to polarization detection, and the orientation of liquid crystal can be controlled by changing the voltage on an LCD pixel, so that the final polarization detection state of the polarized light is determined. A reflective mode display is achieved.

Description of the drawings:

FIG. 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is a schematic diagram of an embodiment of the present invention.

Fig. 3 is a detailed structure of an LCD substrate according to an embodiment of the present invention.

Detailed Description

The following description of several embodiments of the invention is intended to provide a basic understanding of the invention, and is not intended to identify key or critical elements of the invention or to delineate the scope of the invention. According to the technical scheme of the invention, other implementation modes can be obtained by replacing the technical scheme without changing the true spirit of the invention. In the drawings, the thickness of layers and regions are exaggerated for clarity. Nor does it describe all of the various components shown in the figures. The various components in the figures are disclosed as being capable of being implemented by those of ordinary skill in the art. The definition of parity in the embodiment is intended to be interchangeable for classifying pixels of display content. In addition, directional terms (e.g., "upper", "lower", "lateral", "longitudinal", etc.) are used to describe the various embodiments as shown in the figures for the purpose of relative description and are not intended to limit the direction of any embodiment to a particular direction.

In one embodiment of the present invention, as shown in fig. 2, a top emission mode LTPS AMOLED substrate 201 is located on the lower side, where there are a plurality of pixel matrixes with staggered rows and columns, LTPS device circuitry 202 is located on the pixels, including reflective metal 203, anode 204, oled device 206, pixel defining layer 205, cathode 207, and thin film encapsulation layer 208 is located on the upper surface.

The AMLCD substrate 214 has a matrix of pixels thereon that are staggered with respect to rows and columns on the AMOLED one-to-one. The matrix has LTPS pixel circuits 213, common electrodes 211 and pixel electrodes 212, and alignment films 210 are present on the surfaces of the pixel circuits and display electrodes. As shown in fig. 3, the detailed structure of the display circuit is that, on the surface of the substrate 301, there are intrinsic polysilicon 310 of the channel structure active layer of the transistor device, a gate insulating layer 309, a doped polysilicon layer 311 of the gate circuit, a BM layer 312 for shading and insulating, a color filter 302, an M1 metal 307 connected to the intrinsic polysilicon layer 310 through a BM layer and gate insulating layer via hole, an M1 metal layer connected to the doped polysilicon layer 311 through a BM layer via hole, an M2 metal layer 306 connected to the M1 through an insulating layer OC1 (303), and a pixel electrode and a common electrode connected to the M2 metal through an insulating layer OC2 (304).

An alignment film 210 is present on the lower surface of the LCD substrate, and a liquid crystal layer 209 is present between the AMOLED substrate and the AMLCD substrate. When a voltage is applied between the two electrodes, a transverse electric field is formed. The state of deflection of the liquid crystal in the liquid crystal cell is controlled. A polarizer is present on the upper surface of the AMLCD substrate.

In other embodiments of the present invention, the OLED substrate may be a PMOLED, the LCD substrate may be a PMLCD, an alignment film is provided on the lower surface of the LCD substrate, the liquid crystal is in FFS mode or VA mode, a plurality of pixel matrixes with staggered rows and columns are provided on the OLED substrate, a reflective metal is provided on the pixels, an anode, an OLED device, a cathode, and no thin film encapsulation layer is provided on the upper surface. There is a matrix of pixels on the LCD substrate that are staggered with respect to rows and columns on the OLED one-to-one. The pixels are not provided with color filter films, and a liquid crystal layer is arranged between the OLED substrate and the LCD substrate. The polarizer may have a viewing angle compensation function.

Claims

1. A display device comprises a top emission mode OLED substrate, an LCD pixel TFT substrate, a polaroid, and a liquid crystal box display unit controlled by an electric field of the LCD pixel substrate unit between the two substrates.

2. The display device according to claim 1, wherein: the reflective LCD display function is turned on when the display device is in daytime and outdoor ambient light, and the OLED display function is turned on when the display device is in indoor ambient light.

3. The display device of claim 1, wherein: the liquid crystal display mode is a reflective IPS mode (including a reflective FFS mode).

4. The display device of claim 1, wherein: the liquid crystal box display unit is provided with no alignment layer at the OLED substrate side.

5. The display device of claim 1, wherein: and a thin film encapsulation layer is arranged on the OLED substrate.

6. The thin film encapsulation of claim 5, wherein the thin film encapsulation is an organic or inorganic layer or a multilayer structure of alternating organic and inorganic layers.

7. The display device of claim 1, wherein: a color filter film is provided on the pixel structure of the LCD.

8. The display device of claim 1, wherein: the OLED is in one-to-one correspondence with the pixels of the LCD device.

9. The display device of claim 1, wherein: the polaroid has a visual angle compensation function.

10. The display device of claim 1, wherein: the polaroid has a phase delay function.

11. The display device of claim 1, wherein: the LCD substrate has a BM On Array structure, and a BM layer is arranged between the metal wire and the substrate for shading.