CN202929332U

CN202929332U - Display panel and display device

Info

Publication number: CN202929332U
Application number: CN 201220674778
Authority: CN
Inventors: 铃木照晃; 杨亚锋; 金起满
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2012-12-07
Filing date: 2012-12-07
Publication date: 2013-05-08
Anticipated expiration: 2022-12-07

Abstract

The utility model provides a display panel and a display device, and relates to the technical field of the liquid crystal display. The display panel comprises a lower substrate, an upper substrate and a liquid crystal layer between the upper substrate and the lower substrate, wherein the light incidence side of the lower substrate is provided with a lower polarizing film; the light emitting side of the upper substrate is provided with an upper polarizing film; the display panel also comprises a compensation layer, wherein the compensation layer is arranged between the upper substrate and the liquid crystal layer; and the polarization direction of light emitted from the upper substrate is converted to be same with the polarization direction before the light is emitted from the lower substrate by the compensation layer. According to the display panel and the display device disclosed by the utility model, the compensation layer is arranged in the liquid crystal box, and the polarization direction of light penetrating through the upper substrate is converted to be same with the polarization direction before the light enters the lower substrate so as to prevent the dark-state light leakage phenomenon and display unevenness due to glass substrate deformation.

Description

Display panel and display device

Technical field

The utility model relates to technical field of liquid crystal display, relates in particular to a kind of display panel and display device.

Background technology

LCD(Liquid Crystal Display, liquid crystal display) device has the advantages such as lightweight, thin thickness, low in energy consumption and radiation be little, and oneself is widely used in the fields such as infotech, multimedia technology, and becomes gradually the main flow of various display device.Along with the development of display technique, high permeability, large scale, low-power consumption, liquid crystal display becomes the direction of future development cheaply.

The structure of LCD display panel as shown in Figure 1, comprise lower glass substrate 1, top glass substrate 2 and both between the liquid crystal layer 3 of filling.Be formed with transparent electrode layer on infrabasal plate 1 and/or upper substrate 2.The light inlet side of infrabasal plate 1 is provided with lower polaroid 4, and the bright dipping side of upper substrate 2 is provided with upper polarizer 5, as shown in the solid arrow in Fig. 1, and the absorption axes quadrature of lower polaroid 4 and upper polarizer 5 (being respectively 0 degree and 90 degree).When not applying electric field, light produces linearly polarized photon from lower polaroid 4 incidents, and its polarization direction rotates its direct of travel according to liquid crystal molecule, then penetrates from upper polaroid 5, and at this moment, display panel demonstrates white background color; When applying electric field, the permutations of liquid crystal molecule, linearly polarized photon is kept former direction by liquid crystal layer 3, and upper polarizer 5 absorptions, can't penetrate, thereby display panel shows black.

The height of the display quality of LCD and the bright dark degree of gained has direct relation, in order to obtain high contrast, must obtain in theory the lower complete black state of brightness, but in fact, as shown in Figure 2, the torsional deformation of upper lower-glass will cause changing through the retardation of the polarized light of this glass substrate, thereby causes the dark attitude unevenness of LCD.After linearly polarized photon passed from top glass substrate 2, its polarization state was from different before lower glass substrate 1 incident, therefore, can do not absorbed by upper polarizer 5 fully, a part of light can be gone out in transmission, as shown in dotted arrow in figure, cause the light leakage phenomena of dark attitude, caused the unevenness that shows.

The utility model content

The technical matters that (one) will solve

Technical problem to be solved in the utility model is: can avoid display panel and display device because of the unevenness of the caused dark attitude light leakage phenomena of the distortion of glass substrate and demonstration.

(2) technical scheme

For addressing the above problem, the utility model provides a kind of display panel, comprise the liquid crystal layer between infrabasal plate, upper substrate and described upper substrate and infrabasal plate, the light inlet side of described infrabasal plate is provided with lower polaroid, the bright dipping side of described upper substrate is provided with upper polarizer, this display panel also comprises: layer of compensation, be arranged between described upper substrate and described liquid crystal layer, it is identical with the polarization direction before described infrabasal plate incident that described layer of compensation will change into from the polarisation of light direction of described upper substrate outgoing.

Preferably, the long axis direction of the liquid crystal molecule of described liquid crystal layer is identical with the absorption axes direction of described upper polarizer or described lower polaroid.

Preferably, the retardation of described layer of compensation is identical with the retardation of described liquid crystal layer, and the major axis quadrature of the liquid crystal molecule of the slow axis of described layer of compensation and described liquid crystal layer.

Preferably, the direction of the absorption axes of described layer of compensation is identical with the direction of the long axis of liquid crystal molecule of described liquid crystal layer, the predominant wavelength retardation of described layer of compensation and the retardation of described liquid crystal molecule and that equal the incident light of described display panel.

Preferably, described predominant wavelength is 550nm.

Preferably, described display panel also comprises: transparent electrode layer is arranged on the bright dipping side of described infrabasal plate and/or the light inlet side of described upper substrate.

Preferably, described layer of compensation is made of cyclic olefin polymer class, polycarbonate-based or polystyrene type macromolecular material or Liquid Crystalline Polymer Materials.

The utility model also provides a kind of display device, comprises above-mentioned display panel.

(3) beneficial effect

Display panel of the present utility model and display device are by arranging layer of compensation in liquid crystal cell, the polarisation of light direction of passing upper substrate is changed into identical with the polarization direction before the incident infrabasal plate, and then can prevent dark attitude light leakage phenomena that the distortion because of glass substrate causes and the inequality of demonstration.Simultaneously, the utility model can drop to minimum due to the light leak that the glass substrate distortion causes in the situation that do not change the glass substrate deformation properties.

Description of drawings

Fig. 1 is the structural representation of LCD display panel;

Fig. 2 is that the display panel of bitmap 1 produces the principle schematic of light leakage phenomena due to glass deformation;

Fig. 3 is the structural representation of the display panel of embodiment 1;

Fig. 4 is the dark attitude principle schematic of the display panel of embodiment 1;

Fig. 5 is the dark attitude principle schematic of the display panel of embodiment 2.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is a part of embodiment of the present utility model, rather than whole embodiment.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work belongs to the scope that the utility model is protected.

as shown in Figure 3, display panel of the present utility model comprises infrabasal plate 1, liquid crystal layer 3 between upper substrate 2 and upper substrate 1 and infrabasal plate 2, the light inlet side of infrabasal plate 1 is provided with lower polaroid 4, the bright dipping side of upper substrate 2 is provided with upper polarizer 5, and the absorption axes quadrature of upper polarizer 5 and lower polaroid 4, the bright dipping side of infrabasal plate 1 and/or the light inlet side of upper substrate 2 also can arrange the transparent electrode layer (not shown), this display panel also comprises: layer of compensation 6, be arranged between upper substrate 2 and liquid crystal layer 3, it is identical with the polarization direction before infrabasal plate 1 incident that layer of compensation 6 will change into from the polarisation of light direction of upper substrate 2 outgoing, thereby effectively suppress light leak.Preferably, layer of compensation 6 can be made of the macromolecular materials such as cyclic olefin polymer COP class, polycarbonate class or polystyrene PS class or Liquid Crystalline Polymer Materials.

Further illustrate the utility model below by specific embodiment.

Embodiment 1

as shown in Figure 4, in the display panel of the present embodiment, the direction of the major axis of the liquid crystal molecule of the liquid crystal layer 3 shown in solid arrow identical with the direction of the absorption axes of upper polarizer 5 (perhaps can be identical with the direction of the absorption axes of lower polaroid 4), the retardation of layer of compensation 6 is identical with the retardation of liquid crystal layer 2, and the major axis quadrature of the liquid crystal molecule of the slow axis of layer of compensation 6 and liquid crystal layer 3, thereby realize that the polarisation of light direction that will pass upper substrate 2 transforms back into identical with the polarization direction before incident infrabasal plate 1, make the incident light shown in dotted arrow to be absorbed by upper polarizer 5 fully, can not produce light leakage phenomena.

Embodiment 2

as shown in Figure 5, in the display panel of the present embodiment, the long axis direction of the liquid crystal molecule of the liquid crystal layer 3 shown in the solid arrow still direction with the absorption axes of upper polarizer 5 is identical, the direction of the slow axis of layer of compensation 6 is identical with the direction of the long axis of liquid crystal molecule of liquid crystal layer 3, with institute in embodiment 1 lighttightly be, the predominant wavelength retardation of layer of compensation 6 and the retardation of liquid crystal molecule and that equal the incident light of display panel, 550nm for example, thereby can realize that the polarisation of light direction that will pass upper substrate 2 transforms back into identical with the polarization direction before incident infrabasal plate 1, make the incident light shown in dotted arrow to be absorbed by upper polarizer 5 fully, can not produce light leakage phenomena.

In addition, the utility model also provides a kind of display device that comprises above-mentioned display panel, comprise that transparent electrode layer is separately positioned on the display device of the light inlet side of the bright dipping side of infrabasal plate and infrabasal plate, perhaps transparent electrode layer only is arranged on a senior super dimension switch technology (ADvanced Super Dimension Switch of the bright dipping side of infrabasal plate, ADS) type display device, and other ingredients for display device known in the art, do not do at this and give unnecessary details, should be as the restriction to technical solutions of the utility model yet.

Above embodiment only is used for explanation the utility model; and be not limitation of the utility model; the those of ordinary skill in relevant technologies field; in the situation that do not break away from spirit and scope of the present utility model; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present utility model, and scope of patent protection of the present utility model should be defined by the claims.

Claims

1. display panel, comprise the liquid crystal layer between infrabasal plate, upper substrate and described upper substrate and infrabasal plate, the light inlet side of described infrabasal plate is provided with lower polaroid, the bright dipping side of described upper substrate is provided with upper polarizer, it is characterized in that, this display panel also comprises: layer of compensation, be arranged between described upper substrate and described liquid crystal layer, and it is identical with the polarization direction before described infrabasal plate incident that described layer of compensation will change into from the polarisation of light direction of described upper substrate outgoing.

2. display panel as claimed in claim 1, is characterized in that, the long axis direction of the liquid crystal molecule of described liquid crystal layer is identical with the absorption axes direction of described upper polarizer or described lower polaroid.

3. display panel as claimed in claim 2, is characterized in that, the retardation of described layer of compensation is identical with the retardation of described liquid crystal layer, and the major axis quadrature of the liquid crystal molecule of the slow axis of described layer of compensation and described liquid crystal layer.

4. display panel as claimed in claim 2, it is characterized in that, the direction of the slow axis of described layer of compensation is identical with the direction of the long axis of liquid crystal molecule of described liquid crystal layer, the predominant wavelength retardation of described layer of compensation and the retardation of described liquid crystal molecule and that equal the incident light of described display panel.

5. display panel as claimed in claim 4, is characterized in that, described predominant wavelength is 550nm.

6. display panel as claimed in claim 1, is characterized in that, described display panel also comprises: transparent electrode layer is arranged on the bright dipping side of described infrabasal plate and/or the light inlet side of described upper substrate.

7. as the described display panel of claim 1-6 any one, it is characterized in that, described layer of compensation is made of cyclic olefin polymer class, polycarbonate-based or polystyrene type macromolecular material or Liquid Crystalline Polymer Materials.

8. a display device, is characterized in that, comprises the described display panel of claim 1-7 any one.