CN201251665Y

CN201251665Y - RGBW type thin film transistor display device

Info

Publication number: CN201251665Y
Application number: CNU2008201527676U
Authority: CN
Inventors: 陈文娟; 叶訢
Original assignee: SVA Group Co Ltd
Current assignee: SVA Group Co Ltd
Priority date: 2008-09-05
Filing date: 2008-09-05
Publication date: 2009-06-03
Anticipated expiration: 2018-09-05

Abstract

The utility model discloses a RGBW type thin film transistor display device comprising an array lower substrate, a color film upper substrate and a liquid crystal layer filled arranged between the upper and the lower substrates, wherein sub-pixels are formed on the array lower substrate in a moment distribution, the color film upper substrate is provided with red, green, blue and white color filters, three adjacent sub-pixels R, G and B form a color pixel display unit, wherein a transparent color filter is arranged on at least one of the sub-pixels of the color pixel display unit. The RGBW type thin film transistor display device provided by the utility model can improve the color display brightness through dividing the single sub-pixels into two parts, namely one part is an existing color filter R, or G or B, the other part is the transparent color filter, TFT devices do not added, and the complexity of the system driving method does not added.

Description

Red, green, blue and white type thin-film transistor LCD device

Technical field

The utility model patent relates to a kind of thin film transistor (TFT) (TFT) liquid crystal indicator, specially refers to a kind of use red, green, blue and white (RGBW) colored filter and realizes the colored thin-film transistor LCD device that shows of high brightness.

Background technology

Liquid crystal display panel of thin film transistor generally comprises array infrabasal plate, color film upper substrate and is filled in liquid crystal layer between the upper and lower base plate.Form pixel electrode and common electrode on array base palte and the color membrane substrates respectively, form electric field between upper/lower electrode powering up the back, the orientation angles of the change modulates liquid crystal molecule by control electric field intensity, thus the light transmission rate of backlight is changed.Existing thin-film transistor LCD device carries out colour filter by use red (R), green (G), blue (B) colored filter on the color membrane substrates of the array base palte offside that disposes metal routing, obtain some GTGs of different colours red (R), green (G), blue (B) thus, realize versicolor colored the demonstration by the colour mixture addition.

Thin-film transistor LCD device is widely used as display devices such as display, televisor, mobile phone in recent years, and is also more and more higher in the requirement aspect the image demonstrations such as brightness, color saturation to liquid crystal indicator.In traditional color liquid crystal display panel, three sub-pixels that the corresponding colored filter R of each colour element display unit, three kinds of colors of G, B form are strip and arrange.This display packing has a shortcoming, and promptly the whole optical efficiency of panel is lower.Because with regard to single its transmitance of pixel simple computation, each pixel only has 1/3 backlight light can be through utilization, and this makes the backlight optical efficiency reduce greatly.In order to improve the whole transmitance of liquid crystal panel, four sub-pixels that proposed to set up transparent optical filter (W) among the patent JP2007-25697 except that common RGB type optical filter constitute the RGBW type liquid crystal display of color display pixel with 2 * 2 matrixes, and openly relate to the method for the liquid crystal panel pixel intensity that is used to improve this liquid crystal display.Specifically please refer to Fig. 1, this liquid crystal indicator comprises several gate lines 1 and the source electrode line 2 that level and vertical direction are arranged in parallel, gate line 1 and source electrode line 2 intersections are formed with sub-pixel, each sub-pixel carries out charge or discharge by 3 controls of a thin film transistor (TFT) to pixel electrode, and red pieces pixel 5, green sub-pixel 6, blue sub-pixel 7, white sub-pixel 8 constitute a color display pixel 4.The liquid crystal indicator that this patent provides can improve the whole display brightness of panel, but has increased the TFT number simultaneously.Also just using the liquid crystal display faceplate device of red, green, blue and white (RGBW) colored filter and source electrode driver to drive the display packing that pixel multiple writes panel with the polarity dots inversion mode among the patent CN200610152862.1 sets forth.But above existing patent all is transparent optical filter (W) the part drive that will increase newly, and ill effect also can appear in common reversal of poles driving when adopting red, green, blue and white (RGBW) colored filter, needs the comparatively complicated driving circuit of redesign.

The utility model content

Technical problem to be solved in the utility model provides a kind of thin-film transistor LCD device, can promote colored display brightness, and does not increase the TFT device, does not increase the system drive method complexity.

The utility model is to solve the problems of the technologies described above the technical scheme that adopts to provide a kind of red, green, blue and white type thin-film transistor LCD device, comprise the array infrabasal plate, color film upper substrate and be filled in liquid crystal layer between the upper and lower base plate, be formed with the sub-pixel that is matrix distribution on the described array infrabasal plate, dispose the alternate colored filter of RGB on the described color film upper substrate, three adjacent subpixels R, G, B forms a colour element display unit, wherein, have at least the colored filter of a sub-pixel to be provided with clear filter in the described colour element display unit.

In the above-mentioned red, green, blue and white type thin-film transistor LCD device, the area ratio that described clear filter accounts for sub-pixel is 0～50%.

In the above-mentioned red, green, blue and white type thin-film transistor LCD device, described clear filter is made with the Transparent color resistance.

The utility model contrast prior art has following beneficial effect: (1) promotes colored display brightness significantly by in the color display pixel sub-pixel clear filter being set; (2) by the size of the set clear filter area of adjusting and the difference of used look resistance material, perhaps regulate frequency spectrum backlight, keep certain colour gamut degree simultaneously in lifting brightness; (3) the clear filter part drives simultaneously with the place sub-pixel in each sub-pixel, does not increase the system drive method complexity.

Description of drawings

Fig. 1 is existing red, green, blue and white type liquid crystal indicator synoptic diagram.

Fig. 2 is first kind of red, green, blue and white type sub-pixel structure synoptic diagram of the present utility model.

Fig. 3 A is a red, green, blue and white type liquid crystal indicator synoptic diagram of the present utility model.

Fig. 3 B is the sectional view of Fig. 3 A along the A-A line.

Fig. 4 is second kind of red, green, blue and white type sub-pixel structure synoptic diagram of the present utility model.

Fig. 5 is the third red, green, blue and white type sub-pixel structure synoptic diagram of the present utility model.

Fig. 6 is the 4th a kind of red, green, blue and white type sub-pixel structure synoptic diagram of the present utility model.

Among the figure:

1 gate line, 2 source electrode lines, 3 thin film transistor (TFT)s

4 color display pixel, 5 red pieces pixels, 6 green sub-pixels

7 blue sub-pixel 8 white sub-pixel 9 black matrixes

10 public electrodes, 11 pixel electrodes

Embodiment

The utility model will be further described below in conjunction with drawings and Examples.

Fig. 2 is first kind of red, green, blue and white type sub-pixel structure synoptic diagram of the present utility model, sees also Fig. 2, and blue (B) sub-pixel is divided into two parts with it, and a part of zone is set to original blue color filter, and another part zone is set to clear filter (W).When clear filter (W) part accounts for the sub-pixel area ratio is 10%, and promptly the area ratio increases at 3% o'clock in color display pixel, and by analog computation, the whole penetrance of panel can increase by 10%.

The red, green, blue and white type liquid crystal indicator that the utility model provides sees also Fig. 3 A and Fig. 3 B, this liquid crystal indicator comprises several gate lines 1 and the source electrode line 2 that level and vertical direction are arranged in parallel, gate line 1 and source electrode line 2 intersections are formed with sub-pixel, each sub-pixel carries out charge or discharge by 3 controls of a thin film transistor (TFT) to pixel electrode, red pieces pixel 5,

green sub-pixel

6,7 three sub-pixels of blue sub-pixel constitute a color display pixel 4, also be provided with clear filter (W) on its medium blue sub-pixel 7, promptly at existing colored filter red (R), green (G), on the basis that blue (B) three sub-pixels form, blue sub-pixel 7 is divided into two parts, a part is existing colored filter indigo plant (B), another part is set to transparent optical filter (W), blue sub-pixel 7 after the division, white sub-pixel 8 is driven by same thin film transistor (TFT).Clear filter (W) can be made with the Transparent color resistance, also can adopt other schemes, such as use to should sub-pixel R or the low-purity look resistance of G or B make, thickness and former RGB chromatograph thickness are consistent, and specifically shown in Fig. 3 B, are formed with pixel electrode 11 on the array infrabasal plate, be formed with public electrode 10 on the color film upper substrate, the color filter of blue sub-pixel 7, white sub-pixel 8 is positioned on the public electrode 10, and both have essentially identical thickness, and its both sides are black matrix 9.

The setting of clear filter (W) is not limited to blue (B) sub-pixel.Promote effect for reaching better brightness, can in blue (B), red (R) sub-pixel, clear filter (W) be set respectively, the clear filter area accounts for the area of whole sub-pixel and can adjust between 0～50%, when simultaneously clear filter (W) being set on a plurality of sub-pixels, each several part clear filter (W) can equate, also can not wait.

Please continue referring to Fig. 4, Fig. 5 and Fig. 6, in red among Fig. 4 (R), blue (B) two sub-pixels clear filter (W) is set, the area of two parts clear filter (W) is equal substantially.In red among Fig. 5 (R), green (G), blue (B) three sub-pixels clear filter (W) is set respectively, the area of each several part clear filter (W) is unequal.Fig. 6 is provided with clear filter (W) respectively in red (R), green (G), blue (B) three sub-pixels, the area of each several part clear filter (W) is equal substantially.The clear filter area accounts for the area of whole sub-pixel and can adjust between 0～50%.The red, green, blue and white type thin-film transistor LCD device that the utility model provides, the backlight optical efficiency improves greatly, when back light source brightness is constant, can significantly promote colored display brightness; When colored display brightness is constant, can reduce back light source brightness, thereby reduce power consumption, especially be fit to the mobile phone faceplate display application.

In sum, the red, green, blue and white type thin-film transistor LCD device that the utility model provides is on the basis that existing colored filter red (R), green (G), blue (B) three sub-pixels form, single sub-pixel is divided into two parts, a part is existing colored filter R or G or B, another part is set to transparent optical filter (W), not only can promote colored display brightness, and not increase the TFT device, not increase the system drive method complexity.In addition, the utility model can be provided with transparent optical filter (W) on a plurality of sub-pixels, and can regulate the area that the clear filter area accounts for whole sub-pixel easily, keeps certain colour gamut degree simultaneously in lifting brightness.

Though the utility model discloses as above with preferred embodiment; right its is not in order to limit the utility model; any those skilled in the art; in not breaking away from spirit and scope of the present utility model; when doing a little modification and perfect, therefore protection domain of the present utility model is worked as with being as the criterion that claims were defined.

Claims

1, a kind of red, green, blue and white type thin-film transistor LCD device, comprise array infrabasal plate, color film upper substrate and be filled in liquid crystal layer between the upper and lower base plate, be formed with the sub-pixel that is matrix distribution on the described array infrabasal plate, dispose the alternate colored filter of RGB on the described color film upper substrate, three adjacent subpixels R, G, B form a colour element display unit, it is characterized in that having at least the colored filter of a sub-pixel to be provided with clear filter in the described colour element display unit.

2, red, green, blue and white type thin-film transistor LCD device according to claim 1 is characterized in that, the area ratio that described clear filter accounts for sub-pixel is 0～50%.

3, red, green, blue and white type thin-film transistor LCD device according to claim 1 and 2 is characterized in that, described clear filter is made with the Transparent color resistance.