CN1258692C - Double-sided display LCD panel - Google Patents

Abstract

A double-sided display liquid crystal panel is composed of a semi-penetration type liquid crystal panel and a light-emitting device, wherein one side of the semi-penetration type liquid crystal panel is displayed in a penetration mode, and the other side of the semi-penetration type liquid crystal panel is used as a liquid crystal panel in a reflection mode to achieve the purpose of double-sided display; the light-emitting device can be used as a front light source of the display surface in a reflection mode and a backlight source of the display surface in a transmission mode; therefore, the purpose of double-screen display can be achieved on the same panel, and the requirements of light weight products and cost reduction can be met.

Description

The two-sided display liquid crystal panel

Technical field

The invention relates to a kind of demonstration liquid crystal panel of double screen, particularly utilize single panel to carry out the two-sided display liquid crystal panel that double screen shows about a kind of.

Background technology

In a feast for the eyes electronic product, light, thin, short, become the primary consideration of flat-panel screens technology for a short time.Constantly research and develop improvement except reaction velocity, resolution and image quality each side, further pursue the breakthrough on function or the display mode at display.As being extended at present the double screen display mode of consumption electronic products gradually, just picture is outputed to simultaneously two output units (as CRT screen or display panels), not only can extend image spacing, make the visual field broad more, also become real-time monitoring system, so that switch fast and the processing more work.

Because display panels has become the main force of monitor market, therefore, how the design by circuit makes an electronic system be driven the main force that two output units then become the development of present all big enterprises simultaneously.But, for double screen display (Dual Display) aspect that makes hardware, then mostly with two independently LCD be combined into one group of double screen display (DualDisplay).So, no matter on cost and shallow storage space, all need the twice of single LCD,, also lose light, thin, short, the little requirement that present electronic product is pursued except causing on the cost the burden.So exploitation can cooperate the double screen display of double screen display mode also to become important developing goal.

At lcd technology now, reflective liquid-crystal display comprises " fully-reflected type " (Reflective Type) and " semi penetration type " (Transflective Type) two big classes, the former is without backlight, utilization is attached to the baffle reflection extraneous light on the LCD panel, benefit is very power saving (number/one who has only penetration LCD), shortcoming is to can't see screen content and contrast is relatively poor in darker occasion, therefore generally uses front light-source as secondary light source.Yet, when environment light source is not enough, pure reflective contrast and brightness receives discount greatly, and pure penetration contrast deficiency when outdoor high light environment, therefore if can cooperate the penetration technology of auxiliary backlight to form " semi penetration type " LCD, can possess simultaneously penetration and reflective advantage are arranged.The semi penetration type display is just used external light source when extraneous light is enough, can light backlight when not enough, is the scheme that has power saving and auxiliary light concurrently.Because LCD becomes the main flow of monitor market gradually, thus how to make the double screen display in conjunction with existing display technology, but promptly become the current quite important developing focus that the people noted of being very less.

Summary of the invention

For achieving the above object, the present invention utilizes the half penetrated liquid crystal panel light-emitting device of arranging in pairs or groups to form the two-sided display liquid crystal panel.Utilize the penetration pattern to be shown the one side of this half penetrated panel, another side is then reached the purpose of double-sided display as the liquid crystal panel of reflective mode.Simultaneously, the liquid crystal panel that the penetration pattern shows is to come as backlight with light-emitting device, reflective mode then with light-emitting device as surround lighting the front light-source when not enough.

Two plane type LCD provided by the present invention, it includes: a half penetrated display panel, formed by first transparency carrier, second transparency carrier, plurality of electrodes, partially reflecting layer and liquid crystal material, insert an accommodation space between second transparency carrier and first transparency carrier, and between the two every this accommodation space to coincide mutually, this second transparency carrier, promptly the penetration display surface comprises an antireflection light shield layer, with contrast and the image quality that improves this penetration display surface; Liquid crystal material then places in this accommodation space, and plurality of electrodes then is formed at first transparency carrier and second transparency carrier respectively, to apply a voltage to liquid crystal material; Partially reflecting layer is the surface that is formed at second transparency carrier, with allow the part incident light by reflective layer reflects from the first transparency carrier outgoing, make it form reflective display panel; Another part incident light then penetrate through reflective layer forms the penetration display surface by the second transparency carrier outgoing in this second transparency carrier.And a light-emitting device, be to be arranged at first transparency carrier and the extraneous face that contact so that incident light to be provided, and can the while as the front light-source of reflective display panel and the backlight of penetration display surface.Wherein, this light-emitting device can be made up of light source and light guide plate, and light guide plate is to be located at the side of reflective display panel, and light source then provides light to import light guide plate, makes light guide plate that uniform incident light is provided.

In addition, the present invention more comprises the plurality of films transistor with the control plurality of electrodes and put on the voltage of liquid crystal material.And, respectively at overlapping waded polarization plates and the phasic difference wavelength plate of engaging of the reflective display panel and the side of penetration display surface, in order to interdict unwanted incident light and ambient light.This antireflection light shield layer is a black matrix" (Black Matrix).And the material of this black matrix" is to be selected from black resin (black resin) and chromium/chromium oxygen compound (Cr/CrO_x) material one of them form.This black matrix" is one of them layer that is formed at the surface of this second transparency carrier and is contained in this thin film transistor (TFT) of layer structure.

Relevant characteristics and implementation of the present invention cooperate the diagram most preferred embodiment to be described in detail as follows now:

Description of drawings

Fig. 1 is the synoptic diagram of the two-sided display liquid crystal panel of first embodiment of the invention;

Fig. 2 is the display mode synoptic diagram of the reflective display panel of first embodiment of the invention; And

Fig. 3 is the display mode synoptic diagram of the penetration display surface of first embodiment of the invention.

Among the figure

10 first transparency carriers, 20 second transparency carriers

11 colored filters, 21 thin film transistor (TFT)s

12 transparency electrodes, 22 transparency electrodes

13 first wide wave zone quarter-wave plate 23 first wide wave zone quarter-wave plates

14 first polaroids, 24 first polaroids

15 light guide plate, 25 partially reflecting layers

16 light sources, 30 liquid crystal materials

Embodiment

The invention discloses a kind of two-sided display liquid crystal panel, it reaches the purpose of double-sided display in conjunction with half penetrated display panel and light-emitting device.For being described in more detail the pattern of its double-sided display, please refer to Fig. 1, it is the synoptic diagram of the two-sided display liquid crystal panel of first embodiment of the invention.In this first embodiment, include half penetrated display panel and light-emitting device.As shown in Figure 1, half penetrated display panel is made up of reflective display panel part, penetration display surface part and liquid crystal material 30.Reflective display panel is coincided in regular turn by first polaroid, 14, the first wide wave zone quarter-wave plate 13 (being the phasic difference wavelength plate),first transparency carrier 10, coloredfilter 11 andtransparency electrode 12 from outside to inside and forms.The penetration display surface is then combined by first polaroid, 24, the first wide wave zone quarter-wave plate 23,second transparency carrier 20, thin film transistor (TFT) 21,transparency electrode 22 and partially reflectinglayer 25 equally from outside to inside.Insert an accommodation space between reflective display panel and the penetration display surface, and between the two every this accommodation space to coincide mutually, 30 of liquid crystal materials are contained in this accommodation space.An and light-emitting device, formed bylight source 16 andlight guide plate 15,light guide plate 15 is to be located at the side of reflective display panel, 16 of light sources provide light to importlight guide plate 15, makelight guide plate 15 that uniform incident light is provided, and can be simultaneously as the front light-source of reflective display panel and the backlight of penetration display surface.

Wherein, thin film transistor (TFT) is the voltage that puts on liquid crystal material in order to control, its luminous flux of modulation with via color that colored filter produced.Polarization plates and wide wave zone quarter wave plate are then in order to interdict unwanted incident light and ambient light.

The display mode of reflective display panel among first embodiment, as shown in Figure 2, it is the display mode synoptic diagram of the reflective display panel of first embodiment of the invention.Incident light is to provide for surround lighting or via light-emitting device, incident light is by after reflective display panel and theliquid crystal material 30, reflecting incident light via partially reflectinglayer 25 again makes it via 10 outgoing of first transparency carrier, and see through the modulation of thin film transistor (TFT) 21, control outgoing light quantity and color are to form reflective display panel.The display mode of its penetration please refer to Fig. 3, and it is the display mode synoptic diagram of the penetration display surface of first embodiment of the invention.It is the backlight that is used as the penetration display surface with light-emitting device, as shown in Figure 3, incident light is by after reflective display panel and theliquid crystal material 30, there is the part incident light then to pass throughtransparency electrode 22 via 20 outgoing of second transparency carrier, and see through the modulation of thin film transistor (TFT) 21, control outgoing light quantity and color are to form the penetration display surface.

Simultaneously,, can form the antireflection light shield layer, to reduce thin film transistor (TFT) 21 and the reflective light evil that is produced of each metallic signal lines in the display panels in the side of penetration display surface for improving the contrast and the image quality of penetration display surface.The antireflection light shield layer can adopt the black matrix" (Black Matrix) of special processing, is made in the arbitrary layer in the second transparency carrier surface or the thin-film transistor structure.This black matrix" can be by black resin (black resin) or chromium/chromium oxygen compound (Cr/CrO_x) material one of them form.

The present invention forms two-sided display panels in conjunction with half penetrated display panel and light-emitting device, owing to only need use single panel can reach double-sided display, can be used as quite frivolous double screen display, further be widely used in portable product.Simultaneously, can save cost of manufacture, its double-sided display pattern can be used same drives system, and when different user mode, upset or spin upside down gets final product about only the display frame of main display surface need being done.

Though preferred embodiment of the present invention openly as mentioned above; right its is not in order to limit the present invention; any personage who has the knack of correlation technique; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, therefore the scope of patent protection of the present invention scope person of defining that must look the appended claim of this instructions is as the criterion.

Claims (9)

1. two-sided display liquid crystal panel, it includes a half penetrated display panel and a light-emitting device, wherein,

Described half penetrated display panel, it includes:

One first transparency carrier, it allows light incident and outgoing and as a reflective display panel;

One second transparency carrier, it is as a penetration display surface, insert an accommodation space between this second transparency carrier and this first transparency carrier, and with this first transparency carrier at interval this accommodation space to coincide mutually, this penetration display surface comprises an antireflection light shield layer, with contrast and the image quality that improves this penetration display surface;

One liquid crystal material, it places in this accommodation space, can utilize to apply different voltage and control light by this liquid crystal material;

Plurality of electrodes, it is formed at this first transparency carrier and this second transparency carrier respectively, to apply a voltage to this liquid crystal material;

Part reflection horizon, it is formed at the surface of this second transparency carrier, and from the first transparency carrier outgoing, another part incident light then penetrates this partially reflecting layer by the second transparency carrier outgoing by this partially reflecting layer reflection to allow a part of incident light;

Described light-emitting device is that the side that is arranged at this first transparency carrier provides incident light, with as the front light-source of this reflective display panel when ambient light is not enough and the backlight of this penetration display surface.

2. two-sided display liquid crystal panel as claimed in claim 1, it is characterized in that: this light-emitting device is made up of a light source and a light guide plate, this light guide plate is the side that is arranged at this first transparency carrier, and this light source provides light to import this light guide plate, provides uniform incident light via this light guide plate again.

3. two-sided display liquid crystal panel as claimed in claim 1 is characterized in that: described half penetrated display panel also comprises the plurality of films transistor with the control plurality of electrodes and put on the voltage of liquid crystal material.

4. two-sided display liquid crystal panel as claimed in claim 1 is characterized in that: this reflective display panel is to comprise a polarization plates and a phasic difference wavelength plate, in order to interdict unwanted incident light and ambient light.

5. two-sided display liquid crystal panel as claimed in claim 1 is characterized in that: this penetration display surface is to comprise a polarization plates and a phasic difference wavelength plate, in order to interdict unwanted incident light and ambient light.

6. two-sided display liquid crystal panel as claimed in claim 1 is characterized in that: this antireflection light shield layer is a black matrix".

7. two-sided display liquid crystal panel as claimed in claim 6 is characterized in that: the material of this black matrix" is to be selected from black resin and chromium/chromium oxygen compound material one of them forms.

8. two-sided display liquid crystal panel as claimed in claim 6 is characterized in that: this black matrix" is the surface that is formed at this second transparency carrier.

9. two-sided display liquid crystal panel as claimed in claim 6 is characterized in that: this black matrix" is one of them layer that is contained in the thin film transistor (TFT) of layer structure.

Images