CN105319782A - Display panel and display device - Google Patents

Abstract

The invention provides a display panel and a display device. The display panel comprises a first substrate, a second substrate arranged opposite to the first substrate and a pixel array. The pixel array is arranged on the first substrate and at least comprises a pixel, the pixel is provided with a first electrode layer, the first electrode layer is provided with an auxiliary electrode part and a driving electrode part connected with the auxiliary electrode part, the driving electrode part is provided with a plurality of strip-shaped electrodes which are arranged at intervals along a first direction, the area of the auxiliary electrode part is A1, when a light ray passes through the pixel, the pixel is provided with a light-emitting area, the area of the light-emitting area is B, wherein A1 and B satisfy the following equations: 0.11 XB.ltoreq.A 1.ltoreq.0.27 XB, and the units of A1 and B are the same. The invention provides a display panel and a display device, which have higher penetration rate.

Description

Display panel and display device

technical field

The present invention relates to a display panel and a display device, in particular to a display panel and a display device with higher transmittance.

Background technique

With the advancement of technology, flat panel display devices have been widely used in various fields, especially liquid crystal display devices, which have gradually replaced traditional cathode ray tube display devices due to their superior characteristics such as light and thin body, low power consumption and no radiation. , and applied to many types of electronic products, such as mobile phones, portable multimedia devices, notebook computers, LCD TVs and LCD screens, and so on.

An existing liquid crystal display device mainly includes a liquid crystal display panel (LCDPanel) and a backlight module (BacklightModule), which are arranged opposite to each other. The liquid crystal display panel includes a color filter substrate, a thin film transistor substrate and a liquid crystal layer sandwiched between the two substrates. The color filter substrate, the thin film transistor substrate and the liquid crystal layer can form a plurality of pixel units arranged in an array. The backlight module can emit light through the liquid crystal display panel, and display colors through each pixel unit of the liquid crystal display panel to form an image.

In terms of the same brightness, a display panel with a high transmittance can make the display device more power-saving. Therefore, all businesses are working hard to increase the transmittance of the display panel in order to achieve the purpose of saving power and improve the efficiency of their products. Competitiveness.

Contents of the invention

The purpose of the present invention is to provide a display panel and a display device with higher transmittance, so as to improve the competitiveness of products.

To achieve the above purpose, a display panel according to the present invention includes a first substrate, a second substrate and a pixel array. The second substrate is opposite to the first substrate. The pixel array is arranged between the first substrate and the second substrate, and includes at least one pixel. The pixel has a first electrode layer, and the first electrode layer has an auxiliary electrode part and a driving electrode part connected to the auxiliary electrode part. The electrode part has a plurality of strip electrodes arranged at intervals along a first direction, the area of the auxiliary electrode part is A1, when a light passes through the pixel, the pixel has a light-emitting area, and the area of the light-emitting area is B, wherein A1 and B satisfy the following Equation: 0.11×B≤A1≤0.27×B, and the units of A1 and B are the same.

To achieve the above object, a display device according to the present invention includes a display panel, and the display panel has a first substrate, a second substrate and a pixel array. The second substrate is opposite to the first substrate. The pixel array is arranged between the first substrate and the second substrate, and includes at least one pixel. The pixel has a first electrode layer, and the first electrode layer has an auxiliary electrode part and a driving electrode part connected to the auxiliary electrode part. The electrode part has a plurality of strip electrodes arranged at intervals along a first direction, the area of the auxiliary electrode part is A1, when a light passes through the pixel, the pixel has a light-emitting area, and the area of the light-emitting area is B, wherein A1 and B satisfy the following Equation: 0.11×B≤A1≤0.27×B, and the units of A1 and B are the same.

In an embodiment, A1 and B also satisfy the following equation: 0.13×B≦A1≦0.25×B.

In one embodiment, the light emitting region has a first brightness curve along the first direction, the light emitting region has a second brightness curve along a second direction, and the area B of the light emitting region is the first brightness curve along the second direction. The maximum FWHM in one direction is multiplied by the maximum FWHM of the second brightness curve along the second direction, and the first direction is perpendicular to the second direction.

In one embodiment, at least one through hole is formed on the auxiliary electrode portion, and the first electrode layer is electrically connected to a thin film transistor through the through hole.

In one embodiment, the driving electrode portion further has a connection electrode, which is located on a side away from the auxiliary electrode portion and connected to the strip electrodes.

Based on the above, in the display panel and display device of the present invention, the driving electrode portion of the first electrode layer of the pixel has a plurality of strip electrodes arranged at intervals along the first direction, and the area of the auxiliary electrode portion is A1; in addition, When the light passes through the pixel, the area of the light-emitting area of the pixel is B, where A1 and B satisfy the following equation: 0.11×B≤A1≤0.27×B. Therefore, when the area A1 of the auxiliary electrode portion and the area B of the light-emitting region of the pixel satisfy the above equation, the display panel and the display device can take electrical and optical considerations into consideration, so that the transmittance of the pixel can be maximized. Therefore, the display panel and the display device of the present invention can have higher transmittance, and can improve the competitiveness of products.

Description of drawings

FIG. 1A is a schematic cross-sectional view of a display panel according to a preferred embodiment of the present invention.

FIG. 1B is a schematic diagram of a first electrode layer of the display panel shown in FIG. 1A .

FIG. 1C is a schematic diagram of a light-emitting area of a pixel when light passes through a pixel in an embodiment.

FIG. 1D and FIG. 1E are schematic diagrams of luminance distribution curves of the light emitting area of the pixel along a first direction and a second direction, respectively.

2 is a schematic diagram of the relationship between the sum of the charging error of the pixel plus the capacitive coupling voltage and the area ratio of the auxiliary electrode portion to the area of the light emitting region in an embodiment.

3A to 3D are schematic diagrams of the first electrode layer in different embodiments of the present invention.

FIG. 4 is a schematic diagram of a display device according to a preferred embodiment of the present invention.

detailed description

A display panel and a display device according to preferred embodiments of the present invention will be described below with reference to related drawings, wherein the same elements will be described with the same reference symbols.

Please refer to FIG. 1A and FIG. 1B , wherein FIG. 1A is a schematic cross-sectional view of a display panel 1 according to a preferred embodiment of the present invention, and FIG. 1B is a schematic view of the first electrode layer 141 of the display panel 1 in FIG. 1A . The display panel 1 of this embodiment is, for example but not limited to, a fringe field switching (FFS) liquid crystal display panel, or other horizontally driven liquid crystal display panels. In addition, in this embodiment, FIG. 1A and FIG. 1B show a first direction X (horizontal direction), a second direction Y (vertical direction) and a third direction Z, the first direction X, the second direction Y and The third directions Z are substantially perpendicular to each other. Wherein, the first direction X can be substantially parallel to the extending direction of the scanning lines, the second direction Y can be substantially parallel to the extending direction of the data lines, and the third direction Z is perpendicular to the first direction X and the second direction Y respectively. the other direction.

The display panel 1 includes a first substrate 11 , a second substrate 12 and a liquid crystal layer 13 . The first substrate 11 is opposite to the second substrate 12 , and the liquid crystal layer 13 is sandwiched between the first substrate 11 and the second substrate 12 . Wherein, the first substrate 11 and the second substrate 12 are made of light-transmitting materials, such as a glass substrate, a quartz substrate or a plastic substrate, which are not limited. The display panel 1 also includes a pixel array disposed on the first substrate 11 . Wherein, the pixel array includes at least one pixel (or sub-pixel, sub-pixel) P, here a plurality of pixels P are taken as an example. These pixels P are interposed between the first substrate 11 and the second substrate 12 and arranged in a matrix. In addition, the display panel 1 of this embodiment may further include a plurality of scanning lines (not shown in the figure) and a plurality of data lines D, these scanning lines and these data lines D are arranged alternately and perpendicular to each other to define the pixel arrays. area.

The pixel P includes a first electrode layer 141 , an insulating layer 142 and a second electrode layer 143 . In this embodiment, the second electrode layer 143 , the insulating layer 142 and the first electrode layer 141 are sequentially disposed on the side of the first substrate 11 facing the second substrate 12 from bottom to top. In addition, the data line D is disposed on the first substrate 11 , and the pixel P may have another insulating layer 145 covering the data line D, and the second electrode layer 143 is disposed on the insulating layer 145 . In addition, the insulating layer 142 covers the second electrode layer 143, and the first electrode layer 141 is disposed on the insulating layer 142, so that the second electrode layer 143 can be sandwiched between the insulating layer 142 and the insulating layer 145, avoiding the second electrode The layer 143 is short-circuited with the data line D and the first electrode layer 141 . The material of the insulating layer 142 and the insulating layer 145 may, for example but not limited to, include silicon oxide (SiOx) or silicon nitride (SiNx), or other insulating materials. In addition, the first electrode layer 141 and the second electrode layer 143 are respectively a transparent conductive layer, and its material is, for example but not limited to, indium tin oxide (indium-tinoxide, ITO) or indium zinc oxide (indium-zincoxide, IZO). ). In this embodiment, the first electrode layer 141 is a pixel electrode and is electrically connected to the data line D, and the second electrode layer 143 is a common electrode. However, in other embodiments, the first electrode layer 141 can also be a common electrode, and the second electrode layer 143 can be a pixel electrode.

The display panel 1 may further include a black matrix BM and a filter layer (not shown in the figure), and the black matrix BM is disposed on the first substrate 11 or the second substrate 12 and corresponding to the data lines D. The black matrix BM is an opaque material, such as metal or resin, and the metal can be chromium, chromium oxide or chromium oxynitride, for example. In this embodiment, the black matrix BM is arranged on the side of the second substrate 12 facing the first substrate 11, and is located above the data line D along the third direction Z, so when the display panel 1 is viewed from above, the black matrix BM can cover Data line D. The filter layer (not shown in the figure) is disposed on the side of the second substrate 12 and the black matrix BM facing the first substrate 11 , or disposed on the first substrate 11 . Since the black matrix BM is made of an opaque material, an opaque area can be formed on the second substrate 12 , thereby defining a transmissive area. The black matrix BM has a plurality of light-shielding sections, and there is at least one light-shielding section between two adjacent filter parts. The black matrix BM and the filter layer of this embodiment are respectively arranged on the second substrate 12, however, in other embodiments, the black matrix BM or the filter layer can also be respectively arranged on the first substrate 11, so that It is not limited to be a BOA (BMonarray) substrate or a COA (colorfilteronarray) substrate. In addition, the display panel 1 may further include a protective layer (for example, over-coating, not shown in the figure), and the protective layer may cover the black matrix BM and the filter layer. Wherein, the material of the protective layer can be photoresist material, resin material or inorganic material (such as SiOx/SiNx), etc., to protect the black matrix BM and the filter layer from being damaged by subsequent processes.

In addition, as shown in FIG. 1B , the first electrode layer 141 has an auxiliary electrode portion 1411 and a driving electrode portion 1412 connected to the auxiliary electrode portion 1411 . Wherein, the auxiliary electrode portion 1411 has at least one through hole O, and the first electrode layer 141 is electrically connected to a thin film transistor (not shown) of the pixel P through the through hole O. Here, the thin film transistor is the driving transistor of the pixel P, and when the thin film transistor is turned on, the grayscale voltage of the pixel P is input to the first electrode layer 141 through the source and drain of the thin film transistor. Wherein, the area of the auxiliary electrode portion 1411 is denoted by A1.

The driving electrode part 1412 has a plurality of strip electrodes arranged at intervals along the first direction X, and connected to the auxiliary electrode part 1411 respectively. In this embodiment, as shown in FIG. 1B , the number of strip electrodes is three (indicated by S1 , S2 , and S3 ), and the auxiliary electrode portions 1411 are respectively connected to one ends of the three strip electrodes S1 , S2 , and S3 . The strip electrodes S1 , S2 , S3 are spaced apart from each other and arranged in parallel along the first direction X. As shown in FIG. However, in different embodiments, there are also different numbers of strip electrodes, such as two, four, or other numbers. In addition, the driving electrode part 1412 of this embodiment also has a connecting electrode S4, which is located on a side away from the auxiliary electrode part 1411, and is respectively connected to the strip electrodes S1, S2, S3. Here, the area of the driving electrode portion 1412 is denoted by A2.

Please refer to FIG. 1B to FIG. 1E respectively, wherein FIG. 1C is a schematic diagram of the light emitting area of the pixel P when light passes through the pixel P in an embodiment, and FIG. 1D is the brightness of the light emitting area of the pixel P along the first direction X. 1E is a schematic diagram of the brightness distribution curve of the light emitting area of the pixel P along the second direction Y.

As shown in FIG. 1C , when light passes through the pixel P, the pixel P has a light-emitting area (the area where the light can pass through the pixel P). Wherein, when the light passes through the pixel P, as shown in FIG. 1D , the light emitting region has a first brightness curve C1 (the brightness has been normalized) along the first direction X. In addition, as shown in FIG. 1E , when the light passes through the pixel P, the light emitting region also has a second brightness curve C2 along the second direction Y (normalized brightness). Therefore, in this embodiment, the area B of the light-emitting region can be defined as: the maximum half-width Ax (FullWidthatHalfMaximum, FWHM) of the first luminance curve C1 along the first direction X (FullWidthatHalfMaximum, FWHM, that is, the width value of half luminance in the luminance distribution curve; For example, 10 μm≤Ax≤250 μm), multiplied by the maximum FWHM Ay of the second luminance curve C2 along the second direction Y (in general design, Ay≈3Ax; the first direction X is perpendicular to the second direction Y).

As mentioned above, when the scanning lines of the display panel 1 receive a scanning signal, the thin film transistors of the pixels P corresponding to the scanning lines can be respectively turned on, and a data signal corresponding to each row of pixels P can be transmitted through the data lines D To the corresponding pixel electrodes, the display panel 1 can display pictures. In this embodiment, the grayscale voltage can be transmitted from each data line D to the first electrode layer 141 (pixel electrode) of each pixel P, so that an electric field is formed between the first electrode layer 141 and the second electrode layer 143 to drive The liquid crystal molecules of the liquid crystal layer 13 rotate on the plane formed by the first direction X and the second direction Y, and further modulate the light to make the display panel 1 display images.

Please refer to FIG. 1B again. For the design of a pixel P, if the area A2 occupied by the driving electrode portion 1412 is larger, the area B of the light-emitting region of the pixel P will also be relatively larger (the two have a proportional relationship), so that the transmittance of the pixel P is also larger. However, when the size of each pixel P and the design of the thin film transistor are fixed, the area A2 of the driving electrode portion 1412 is also limited. Therefore, in order to increase the transmittance of the display panel 1 , it can be achieved by increasing the area A2 of the driving electrode portion 1412 and reducing the area A1 of the auxiliary electrode portion 1411 . However, the auxiliary electrode portion 1411 with a smaller area will not only affect the setting of the through hole O, but also affect the electrical properties of the pixel P. Capacitance) also becomes smaller, thereby affecting the charging time (charging time) and charging voltage of the pixel electrode. In addition, if the auxiliary electrode portion 1411 with a larger area is designed, the capacitance of the pixel P will be increased and the charging time of the pixel electrode will be increased (this is unfavorable for a panel with high ppi (PixelsPerInch)), but it can reduce the thin film in the pixel P. The leakage current ratio of the transistor makes the grayscale voltage of the pixel closer to its actual charging voltage. Therefore, the ratio of the area A1 of the auxiliary electrode portion 1411 to the area A2 of the driving electrode portion 1412 (or the area B of the light-emitting region) of the pixel P needs to be properly considered to meet both electrical and optical requirements.

Generally speaking, the actual charging voltage of the pixel electrode is approximately equal to the grayscale voltage transmitted by the data line D minus the charging error Ve, and then subtracts the capacitive coupling voltage (which can be called feedthrough voltage) V _FT (that is, the actual charging voltage=gray step voltage - Ve - V _FT ). Therefore, in order to make the actual charging voltage of the pixel P closer to the gray-scale voltage and have better display quality, the sum of the charging error Ve and the capacitive coupling voltage V _FT should be as small as possible, so that the actual charging voltage is closer to the gray-scale voltage the better. Among them, the formula of charging error Ve and capacitive coupling voltage V _FT can be shown as follows:

Ve＝V ₀ -V ₀ (1-e ^(-t/RC) )---(Formula 1)

$V_{\mathrm{FT}}=\frac{C_{\mathrm{gd}}}{C}(V_{\mathrm{g\; H}}-V_{\mathrm{gL}})$ ---(Formula 2)

Wherein, C is the total capacitance value of the pixel P (i.e. the sum of storage capacitance, parasitic capacitance and liquid crystal capacitance), C _gd is the parasitic capacitance of the gate and drain of the thin film transistor, R is the resistance value of the thin film transistor, V _gH and V _gL are the control voltages of the thin film transistors, respectively.

Then, using the proportional relationship between the capacitance and the electrode area, the calculation formulas of the charging error Ve and the capacitive coupling voltage V _FT can be deduced as follows:

$\begin{array}{c}\mathrm{<span\; class="notranslate">\; Ve</span>}<span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; e</span>}}^{<span\; class="notranslate">\; (</span><span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; RC</span>}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; )</span>\\ <span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; e</span>}}^{<span\; class="notranslate">\; (</span><span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; RC</span>}<span\; class="notranslate">\; )</span>}\end{array}$

$\begin{array}{c}<span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; e</span>}}^{<span\; class="notranslate">\; (</span><span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; R</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&epsiv;</span>}\frac{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; )</span>}\\ <span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; e</span>}}^{<span\; class="notranslate">\; (</span><span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; /</span><span\; class="notranslate">\; [</span>\frac{\mathrm{<span\; class="notranslate">\; R\&epsiv;A</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}}<span\; class="notranslate">\; ]</span><span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; )</span>}\\ <span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; e</span>}}^{<span\; class="notranslate">\; (</span><span\; class="notranslate">\; [</span>\frac{<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; td</span>}}{\mathrm{<span\; class="notranslate">\; R\&epsiv;A</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span><span\; class="notranslate">\; -</span>\frac{\mathrm{<span\; class="notranslate">\; td</span>}}{\mathrm{<span\; class="notranslate">\; R\&epsiv;A</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; )</span>}\end{array}$

Since the area A2 of the driving electrode portion 1412 is roughly proportional to the area B of the light emitting region in design, A2=(B/a). In one embodiment, the value of a may be 0.76. therefore,

$\mathrm{<span\; class="notranslate">\; Ve</span>}<span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; e</span>}}^{<span\; class="notranslate">\; (</span><span\; class="notranslate">\; [</span>\frac{{<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; tda</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; R\&epsiv;B</span>}}<span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; B</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span><span\; class="notranslate">\; -</span>\frac{\mathrm{<span\; class="notranslate">\; tda</span>}}{\mathrm{<span\; class="notranslate">\; R\&epsiv;B</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; )</span>}$

in addition,

$\begin{array}{c}{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; FT</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; C</span>}}_{\mathrm{<span\; class="notranslate">\; gd</span>}}}{\mathrm{<span\; class="notranslate">\; C</span>}}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; g\; H</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; gL</span>}}<span\; class="notranslate">\; )</span>\\ <span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; d</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; C</span>}}_{\mathrm{<span\; class="notranslate">\; gd</span>}}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; g\; H</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; gL</span>}}<span\; class="notranslate">\; )</span>}{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&epsiv;</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; d</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; C</span>}}_{\mathrm{<span\; class="notranslate">\; gd</span>}}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; g\; H</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; gL</span>}}<span\; class="notranslate">\; )</span>}{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&epsiv;</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; \&epsiv;</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>}\\ <span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; C</span>}}_{\mathrm{<span\; class="notranslate">\; gd</span>}}}{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&epsiv;</span>}\frac{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; g\; H</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; gL</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; d</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; C</span>}}_{\mathrm{<span\; class="notranslate">\; gd</span>}}}{\mathrm{<span\; class="notranslate">\; \&epsiv;</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; g\; H</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; gL</span>}}<span\; class="notranslate">\; )</span>\\ <span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; d</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; C</span>}}_{\mathrm{<span\; class="notranslate">\; gd</span>}}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; g\; H</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; gL</span>}}<span\; class="notranslate">\; )</span>}{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&epsiv;</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; B</span>}<span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; B</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; \&epsiv;</span>}<span\; class="notranslate">\; \&times;</span>\frac{\mathrm{<span\; class="notranslate">\; B</span>}}{\mathrm{<span\; class="notranslate">\; a</span>}}<span\; class="notranslate">\; )</span>}\end{array}$

Therefore, the sum of Ve and V _FT can be expressed as a function:

$\mathrm{<span\; class="notranslate">\; f</span>}<span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; B</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; Ve</span>}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; FT</span>}}<span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; e</span>}}^{<span\; class="notranslate">\; (</span><span\; class="notranslate">\; [</span>\frac{{<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; tda</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; R\&epsiv;B</span>}}<span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; B</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span><span\; class="notranslate">\; -</span>\frac{\mathrm{<span\; class="notranslate">\; tda</span>}}{\mathrm{<span\; class="notranslate">\; R\&epsiv;B</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; d</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; C</span>}}_{\mathrm{<span\; class="notranslate">\; gd</span>}}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; g\; H</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; gL</span>}}<span\; class="notranslate">\; )</span>}{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&epsiv;</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; B</span>}<span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; B</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; \&epsiv;</span>}<span\; class="notranslate">\; \&times;</span>\frac{\mathrm{<span\; class="notranslate">\; B</span>}}{\mathrm{<span\; class="notranslate">\; a</span>}}<span\; class="notranslate">\; )</span>}$

Since the calculation formula of the function f is quite complicated, the present invention does not solve the function f directly, but solves it by numerical solution. In the numerical solution, the actual data (C _gd , R, C, V _gH , C _gL ) of the pixel P of some existing implementations are substituted into the original formulas (1) (2) of the charging error Ve and the capacitive coupling voltage V _FT . Therefore, different sets of numerical values can obtain different (Ve+V _FT ) values shown in FIG. 2 , and further obtain the curve F1 formed by the actual data. Then the curve F1 is simulated mathematically to obtain the trend curve F2 of (Ve+V _FT ). Therefore, the equation of the resulting curve F2 is:

$\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; f</span>}<span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; B</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; 4.2792</span>}\mathrm{<span\; class="notranslate">\; x</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1.628</span>}\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 2.296</span>}$

In order to get the minimum value of (Ve+V _FT ), differentiate the above formula and find the extreme value:

${\mathrm{<span\; class="notranslate">\; the\; y</span>}}^{<span\; class="notranslate">\; \&prime;</span>}<span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; f</span>}}^{<span\; class="notranslate">\; \&prime;</span>}<span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; B</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 8.558</span>}\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1.628</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}$

$\frac{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; B</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0.19</span>}$

Therefore, when the ratio of the area A1 of the auxiliary electrode portion 1411 to the area B of the light-emitting region is 0.19, the sum of the charging error Ve and the capacitive coupling voltage V _FT is the minimum, so that the actual charging voltage of the pixel electrode and the gray scale voltage At this time, the charging efficiency of the pixel electrode is the highest, and the transmittance of the pixel P can also be maximized, thereby making the display panel 1 have a higher transmittance and improving the competitiveness of the product.

However, considering the variations in the process, in this embodiment, when A1 and B satisfy the following inequality, the display panel 1 can have a better transmittance: 0.11×B≤A1≤0.27×B, where A1 and B The unit is the square of microns. Preferably, when A1 and B also satisfy the following equation, the display panel 1 can have a better transmittance: 0.13×B≦A1≦0.25×B.

In addition, please refer to FIG. 3A to FIG. 3D , which are schematic diagrams of the first electrode layers 141 a to 141 d in different embodiments of the present invention. It should be noted firstly that the patterns of the first electrode layers 141 a - 141 d in FIGS. 3A to 3D are just examples and should not be used to limit the present invention.

As shown in FIG. 3A , the main difference between the first electrode layer 141 a and the first electrode layer 141 in FIG. 1B is that the first electrode layer 141 a only has three strip electrodes S1 , S2 , and S3 and does not have a connecting electrode S4 .

In addition, as shown in FIG. 3B, the main difference between the first electrode layer 141b and the first electrode layer 141 in FIG. 1B is that, in the first electrode layer 141b, the second direction Y is still substantially parallel to the extending direction of the data line D. , but the first direction X and the second direction Y are not perpendicular to each other, but form an acute angle, so that the pixel is approximately in the shape of a parallelogram. In addition, each strip electrode S1 , S2 , S3 of the first electrode layer 141 b has two turning points. In addition, the connection position between the auxiliary electrode part 1411 and the driving electrode part 1412 is slightly different from that in FIG. 1B .

In addition, as shown in FIG. 3C , the main difference between the first electrode layer 141c and the first electrode layer 141b in FIG. 3B is that the strip electrode S1 has only one turn, but the strip electrodes S2 and S3 have two turns respectively. In addition, the connection position between the auxiliary electrode portion 1411 and the driving electrode portion 1412 and the shape of the auxiliary electrode portion 1411 are slightly different from those in FIG. 3B .

In addition, as shown in Figure 3D, the main difference between the first electrode layer 141d and the first electrode layer 141b in Figure 3B is that the first electrode layer 141d has four strip electrodes S1, S2, S3, S5, so that the first electrode layer The area of the layer 141d is larger than that of the first electrode layer 141b.

In addition, other features of the first electrode layers 141 a - 141 d can refer to the same elements of the first electrode layer 141 correspondingly, and will not be repeated here.

In addition, please refer to FIG. 4 , which is a schematic diagram of a display device 2 according to a preferred embodiment of the present invention.

The display device 2 includes a display panel 3 and a backlight module 4 (BacklightModule). The display panel 3 and the backlight module 4 are arranged opposite to each other. Wherein, the display panel 3 can be the above-mentioned display panel 1, and the first electrode layer of the pixel of the display panel 1 can be the above-mentioned first electrode layer 141, 141a, 141b, 141c or 141d, or its variation, its structure The details thereof can be referred to above, and no further description is given. When the light E emitted by the backlight module 4 passes through the display panel 3 , each pixel of the display panel 3 can display colors to form an image.

To sum up, in the display panel and display device of the present invention, the driving electrode part of the first electrode layer of the pixel has a plurality of strip electrodes arranged at intervals along the first direction, and the area of the auxiliary electrode part is A1; in addition, When the light passes through the pixel, the area of the light-emitting area of the pixel is B, where A1 and B satisfy the following equation: 0.11×B≤A1≤0.27×B. Therefore, when the area A1 of the auxiliary electrode portion and the area B of the light-emitting region of the pixel satisfy the above equation, the display panel and the display device can take electrical and optical considerations into consideration, so that the transmittance of the pixel can be maximized. Therefore, the display panel and the display device of the present invention can have higher transmittance, and can improve the competitiveness of products.

The above descriptions are illustrative only, not restrictive. Any equivalent modification or change made without departing from the spirit and scope of the present invention shall be included in the scope of the patent application.

Claims (10)

1. A display panel, characterized in that the display panel comprises: a first substrate; a second substrate disposed opposite to the first substrate; and A pixel array, arranged between the first substrate and the second substrate, the pixel array includes at least one pixel, the pixel has a first electrode layer, the first electrode layer has an auxiliary electrode part and the auxiliary electrode A drive electrode part connected to the part, the drive electrode part has a plurality of strip electrodes arranged at intervals along a first direction, the area of the auxiliary electrode part is A1, when a light passes through the pixel, the pixel has a light-emitting area, the pixel The area of the light-emitting region is B, Wherein, A1 and B satisfy the following equation: 0.11×B≤A1≤0.27×B, and the units of A1 and B are the same. 2. The display panel according to claim 1, wherein A1 and B further satisfy the following equation: 0.13×B≦A1≦0.25×B. 3. The display panel according to claim 1, wherein the luminous region has a first luminance curve along the first direction, the luminous region has a second luminance curve along a second direction, and the luminous region has a Area B is the maximum FWHM of the first luminance curve along the first direction multiplied by the maximum FWHM of the second luminance curve along the second direction, and the first direction is perpendicular to the second direction. 4. The display panel as claimed in claim 1, wherein at least one through hole is formed on the auxiliary electrode portion, and the first electrode layer is electrically connected to a thin film transistor through the through hole. 5 . The display panel according to claim 1 , wherein the driving electrode portion further has a connecting electrode, the connecting electrode is located on a side away from the auxiliary electrode portion and is connected to the strip electrodes. 6. A display device, characterized in that the display device comprises: A display panel has a first substrate, a second substrate and a pixel array, the first substrate is opposite to the first substrate, arranged between the first substrate and the second substrate, and includes at least one Pixel, the pixel has a first electrode layer, the first electrode layer has an auxiliary electrode portion and a driving electrode portion connected to the auxiliary electrode portion, the driving electrode portion has a plurality of strip electrodes spaced along a first direction It is set that the area of the auxiliary electrode part is A1, when a light passes through the pixel, the pixel has a light-emitting area, and the area of the light-emitting area is B, Wherein, A1 and B satisfy the following equation: 0.11×B≤A1≤0.27×B, and the units of A1 and B are the same. 7. The display device according to claim 6, wherein A1 and B further satisfy the following equation: 0.13×B≦A1≦0.25×B. 8. The display device according to claim 6, wherein the light emitting region has a first brightness curve along the first direction, the light emitting region has a second brightness curve along a second direction, and the light emitting region has a second brightness curve along the first direction. Area B is the maximum FWHM of the first luminance curve along the first direction multiplied by the maximum FWHM of the second luminance curve along the second direction, and the first direction is perpendicular to the second direction. 9 . The display device according to claim 6 , wherein at least one through hole is formed on the auxiliary electrode portion, and the first electrode layer is electrically connected to a thin film transistor through the through hole. 10 . The display device according to claim 6 , wherein the driving electrode portion further has a connection electrode, the connection electrode is located on a side away from the auxiliary electrode portion and is connected to the strip electrode. 11 .