TWI674458B - Display panel - Google Patents

Abstract

A display panel includes a first substrate, a pixel unit, a second substrate located on the first substrate, and a display medium layer located between the first substrate and the second substrate. The pixel unit is disposed on the first substrate and includes a first sub-pixel unit having a first pixel electrode, a second sub-pixel unit having a second pixel electrode, and a third sub-picture having a third pixel electrode.素 Unit. The first pixel electrode has only a first slit and a second slit that are staggered with each other. The second pixel electrode has only a third slit and a fourth slit that are staggered with each other. The third pixel electrode has only a fifth slit and a sixth slit that are staggered with each other. The width of the fifth slit is larger than the width of the fifth slit and the width of the third slit. The second substrate is located on the first substrate. The display medium layer is located between the first substrate and the second substrate.

Description

Display panel

The present invention relates to a display panel, and more particularly to a display panel with high transmittance and better image quality.

In the development of display panels, with the advancement of optoelectronic technology and semiconductor manufacturing technology, liquid crystal displays with superior characteristics such as high picture quality, good space utilization efficiency, low power consumption and no radiation have gradually become the mainstream of the market. In order to provide a wide viewing angle display effect, a technology of Polymer Stabilized Alignment (PSA) has been proposed.

A general polymer-stabilized alignment type liquid crystal display panel often has a plurality of slits parallel to each other. However, these comb-like or grid-like parallel slits will cause corresponding comb-like or grid-like dark streaks on the display panel, thereby reducing the transmittance. In addition, the liquid crystal in the polymer-stabilized alignment type liquid crystal display panel is a continuum. Therefore, the liquid crystal array may be discontinuous due to inconsistent electric fields. Such a phenomenon in the performance of the display panel, microscopic observation is that there will be dark streaks on the pixels, macroscopic performance will reduce the transmittance or produce color shifts, which will cause the display panel's pixel quality to decline.

The invention provides a display panel which has better picture quality.

The display panel of the present invention includes a first substrate, at least one pixel unit, a second substrate, and a display medium layer. The pixel unit is disposed on the first substrate, wherein the pixel unit is electrically connected to a signal line extending along the first direction. The pixel unit includes a first sub-pixel unit, a second sub-pixel unit, and a third sub-pixel unit. The first sub-pixel unit includes a first pixel electrode. The first pixel electrode only has a first slit and a second slit, wherein the first slit extends in the first direction, and the second slit extends in the second direction and is intersected with the first slit, wherein the first direction Different from the second direction, the first slit has a first width in the second direction, and the second slit has a second width in the first direction. The second sub-pixel unit includes a second pixel electrode. The second pixel electrode has only a third slit extending in the first direction and a fourth slit extending in the second direction and interlaced with the third slit. The third slit has a third width in the second direction. The fourth slit has a fourth width in the first direction. The third sub-pixel unit includes a third pixel electrode. The third pixel electrode has only a fifth slit extending in the first direction and a sixth slit extending in the second direction and intersecting with the fifth slit. The fifth slit has a fifth width in the second direction. The sixth slit has a sixth width in the first direction, wherein the fifth width is larger than the first width, and the fifth width is larger than the third width. The second substrate is located on the first substrate. The display medium layer is located between the first substrate and the second substrate.

Based on the above, in the display panel of the present invention, the first pixel electrode has only a first slit and a second slit that are interlaced with each other, and the second pixel electrode has only a third slit and a fourth slit that are interlaced with each other. , And the third pixel electrode has only The five slits and the sixth slit, and the fifth width of the fifth slit is larger than the first width of the first slit and the third width of the third slit. Therefore, the display panel can improve the problems of insufficient color saturation and color shift of the display screen, and has better image quality.

In order to make the above features and advantages of the present invention more comprehensible, embodiments are hereinafter described in detail with reference to the accompanying drawings.

100, 200, 300, 400, 500‧‧‧ display panels

110‧‧‧first substrate

111‧‧‧first electrode layer

112, 113‧‧‧ Insulation

121‧‧‧ the first signal line

122‧‧‧Second Signal Line

PU‧‧‧ Pixel Unit

PU1‧‧‧ the first sub pixel unit

131, 231, 331, 431‧‧‧ the first pixel electrode

131a, 231a, 331a, 431a, 531a‧‧‧ First slit

SRa‧‧‧first width

131b, 231b, 331b, 431b, 531b‧‧‧Second slit

SRb‧‧‧Second width

431c‧‧‧The first staggered point

141‧‧‧first color conversion layer

141h‧‧‧thickness

GapR‧‧‧First thickness

151‧‧‧first active element

S1‧‧‧First source

D1‧‧‧first drain

G1‧‧‧first gate

161a‧‧‧long side

161b‧‧‧short side

PU2‧‧‧Second Sub Pixel Unit

132, 232, 332, 432‧‧‧ second pixel electrode

132a, 232a, 332a, 432a, 532a‧‧‧ Third slit

SGa‧‧‧ Third Width

132b, 232b, 332b, 432b, 532b‧‧‧ Fourth slit

SGb‧‧‧ fourth width

432c‧‧‧Second Interlace

142‧‧‧second color conversion layer

142h‧‧‧thickness

GapG‧‧‧Second Thickness

152‧‧‧Second Active Element

S2‧‧‧Second Source

D2‧‧‧Second Drain

G2‧‧‧Second gate

162a‧‧‧long side

162b‧‧‧short side

PU3‧‧‧ the third sub pixel unit

133, 233, 333, 433‧‧‧ Third pixel electrode

133a, 233a, 333a, 433a, 533a‧‧‧ fifth slit

SBa, SBa1, SBa2‧‧‧ fifth width

133b, 233b, 333b, 433b, 533b‧‧‧ Sixth slit

SBb‧‧‧ Sixth Width

433c‧‧‧ Third Interlaced Point

143‧‧‧third color conversion layer

143h‧‧‧thickness

GapB‧‧‧ Third thickness

153‧‧‧Third active element

S3‧‧‧third source

D3‧‧‧th third drain

G3‧‧‧third gate

163a‧‧‧long side

163b‧‧‧short side

170‧‧‧Display media layer

180‧‧‧second substrate

181‧‧‧Second electrode layer

182‧‧‧Alignment layer

183‧‧‧Light-shielding layer

190a‧‧‧first direction

190b‧‧‧Second direction

H‧‧‧ Display panel vertical side view direction

V‧‧‧ Display panel horizontal side view direction

FIG. 1A is a schematic partial top view of a display panel according to a first embodiment of the present invention.

Fig. 1B is a schematic cross-sectional view taken along line A-A 'in Fig. 1A.

FIG. 2 is a schematic top view of a display panel according to a second embodiment of the present invention.

FIG. 3 is a schematic partial top view of a display panel according to a third embodiment of the present invention.

FIG. 4 is a schematic top view of a display panel according to a fourth embodiment of the present invention.

FIG. 5A is a display screen taken by a display panel of a comparative example of the present invention under an optical microscope.

FIG. 5B is a graph showing the correspondence between the grayscale value of each color and the normalized brightness in a display panel of a comparative example of the present invention in different directions.

6A is a display panel of a first test example of the present invention under an optical microscope; Captured display.

FIG. 6B is a graph showing the correspondence between the grayscale value of each color and the normalized brightness of the display panel in the first test example of the present invention in different directions.

FIG. 7A is a display screen image of a display panel of a second test example of the present invention taken under an optical microscope.

FIG. 7B is a curve diagram of the correspondence between the grayscale value of each color and the normalized brightness of the display panel in the second test example of the present invention in different directions.

In the drawings, the thicknesses of layers, films, panels, regions, etc. are exaggerated for clarity. Throughout the description, the same reference numerals denote the same elements. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or Intermediate elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connected" may refer to a physical and / or electrical connection (coupling), and an electrical connection (coupling) may have intervening elements.

As used herein, "about", "approximately", "approximately", "substantially" or "substantially" includes the stated value and an average value within an acceptable deviation range of a particular value determined by one of ordinary skill in the art Taking into account the measurement in question and the specific number of measurement-related errors (ie, limitations of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or ± 30%, ± 20%, ± 10%, ± 5% Inside. Furthermore, the terms "about", "approximately", "approximately", "substantially", or "substantially" as used herein may select a more acceptable range of deviation or standard deviation based on optical properties, etching properties, or other properties Instead of applying a standard deviation to all properties.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted to have meanings consistent with their meanings in the context of the related art and the present invention, and will not be interpreted as idealized or excessive Formal meaning unless explicitly defined as such in this article.

In addition, the same or similar reference numbers indicate the same or similar elements, which will not be described in detail in the following paragraphs.

FIG. 1A is a schematic partial top view of a display panel according to a first embodiment of the present invention. Fig. 1B is a schematic cross-sectional view taken along line A-A 'in Fig. 1A. For clarity and ease of description, the film layers in the drawing are omitted in FIGS. 1A and 1B. Hereinafter, an embodiment of the display panel 100 according to the first embodiment of the present invention will be described in detail with reference to FIGS. 1A and 1B.

The display panel 100 includes a first substrate 110, at least one pixel unit PU, at least one first signal line 121, at least one second signal line 122, a second substrate 180, and a display medium layer 170. The material of the first substrate 110 may be glass, quartz, organic polymer, or other suitable materials, and the present invention is not limited thereto. The first substrate 110 may have a first electrode layer 111 and a plurality of insulating layers 112 and 113. The second substrate 180 is located on the first substrate 110. The material of the second substrate 180 may be glass, quartz, or Organic polymers or other suitable materials are not limited in the present invention. The second substrate 180 may include a second electrode layer 181 and an alignment layer 182. The display medium layer 170 is located between the first substrate 110 and the second substrate 180. The display medium layer 170 may include liquid crystal molecules, an electrophoretic display medium, or other suitable media. The display medium layer 170 in the following embodiments of the present invention takes liquid crystal molecules as an example, but the present invention is not limited thereto. Furthermore, the liquid crystal molecules in the following embodiments of the present invention are preferably liquid crystal molecules that can be rotated or switched by a horizontal electric field or liquid crystal molecules that can be rotated or switched by a lateral electric field, but the present invention is not limited to this. this.

The first signal line 121 extends along the first direction 190a, the second signal line 122 extends along the second direction 190b, and the first direction 190a is different from the second direction 190b. The first signal line 121 and the second signal line 122 may be different conductive film layers on the first substrate 110. That is, the first signal line 121 and the second signal line 122 may be interlaced with each other on the first substrate 110. In addition, based on considerations of conductivity, the first signal line 121 and / or the second signal line 122 are generally made of a metal material, but the present invention is not limited thereto. In other embodiments, the first signal line 121 and / or the second signal line 122 may also use an alloy, a nitride of a metal material, an oxide of a metal material, an oxynitride of a metal material, a conductive polymer, or other suitable materials. material. In addition, in the embodiment shown in FIG. 1A, the number of the first signal lines 121 is three, and the number of the second signal lines 122 is one, but the present invention is not limited thereto. In other feasible embodiments, the number of the first signal lines 121 may be one or more, and the number of the second signal lines 122 may be one or more.

The pixel unit PU is disposed on the first substrate 110, and the pixel unit PU includes The first sub-pixel unit PU1, the second sub-pixel unit PU2, and the third sub-pixel unit PU3 are included. The first sub-pixel unit PU1 has a corresponding long side 161a and a corresponding short side 161b. The first slit (or the first main slit) 131a is substantially parallel to the long side 161a, and the second slit ( (Also referred to as a second main slit) 131b is substantially parallel to the short side 161b. The second sub-pixel unit PU2 has a corresponding long side 162a and a corresponding short side 162b. The third slit (or the third main slit) 132a is substantially parallel to the long side 162a, and the fourth slit ( (Also referred to as a fourth main slit) 132b is substantially parallel to the short side 162b. The third sub-pixel unit PU3 has a corresponding long side 163a and a corresponding short side 163b, the fifth slit (or the fifth main slit) 133a is substantially parallel to the long side 163a, and the sixth slit ( (Also referred to as a sixth main slit) 133b is substantially parallel to the short side 163b. That is, the long sides 161a, 162a, and 163a are located in the first direction 190a, and the short sides 161b, 162b, and 163b are located in the second direction 190b, but it is not limited thereto. In other embodiments, the long sides 161a, 162a, and 163a are located in the second direction 190b and the short sides 161b, 162b, and 163b are located in the first direction 190a. In this embodiment, the first direction 190a may be substantially perpendicular to the second direction 190b. That is, if viewed from a top view, the first sub-pixel unit PU1, the second sub-pixel unit PU2, and the third sub-pixel unit PU3 may be substantially rectangular, and the length of the first slit 131a is longer than the second The length of the slit 131b, the length of the third slit 132a is greater than the length of the fourth slit 132b, and the length of the fifth slit 133a is greater than the length of the sixth slit 133b, but is not limited thereto.

The first sub-pixel unit PU1 includes a first pixel electrode 131, a first active element 151, and a first color conversion layer 141. The first active element 151 may include a first A source S1, a first gate G1, and a first drain D1. The first source electrode S1 is electrically connected to a first signal line 121, the first gate electrode G1 is electrically connected to a second signal line 122, and the first drain electrode D1 is electrically connected to a first pixel electrode 131. The first color conversion layer 141 is configured corresponding to the first pixel electrode 131, so that the first sub-pixel unit PU1 displays the color corresponding to the first color conversion layer 141 under the control of the first active element 151. Preferably, the first pixel electrode 131 has only the first slit 131a and the second slit 131b. The first slit 131a extends substantially in the first direction 190a, and the second slit 131b extends substantially in the second direction 190b, but is not limited thereto. In some embodiments, the length of the first slit 131a is greater than the length of the second slit 131b, but is not limited thereto. The first slit 131a and the second slit 131b are substantially staggered. The first slit 131a has a first width SRa in the second direction 190b, and the second slit 131b has a second width SRb in the first direction 190a.

The second sub-pixel unit PU2 includes a second pixel electrode 132, a second active element 152, and a second color conversion layer 142. The second active element 152 may include a second source S2, a second gate G2, and a second drain D2. The second source electrode S2 is electrically connected to another first signal line 121, the second gate electrode G2 is electrically connected to a second signal line 122, and the second drain electrode D2 is electrically connected to a second pixel electrode 132. The second color conversion layer 142 is configured corresponding to the second pixel electrode 132 so that the second sub-pixel unit PU2 displays the color corresponding to the second color conversion layer 142 under the control of the second active element 152. Preferably, the second pixel electrode 132 has only the third slit 132a and the fourth slit 132b. The third slit 132a extends substantially in the first direction 190a, and the fourth slit 132b extends substantially in the second direction 190b, but is not limited thereto. Yube In this embodiment, the length of the third slit 132a is greater than the length of the fourth slit 132b, but is not limited thereto. The third slit 132a and the fourth slit 132b are substantially staggered. The third slit 132a has a third width SGa in the second direction 190b, and the fourth slit 132b has a fourth width SGb in the first direction 190a.

The third sub-pixel unit PU3 includes a third pixel electrode 133, a third active element 153, and a third color conversion layer 143. The third active element 153 may include a third source S3, a third gate G3, and a third drain D3. The third source electrode S3 is electrically connected to another first signal line 121, the third gate electrode G3 is electrically connected to a second signal line 122, and the third drain electrode D3 is electrically connected to a third pixel electrode 133. The third color conversion layer 143 is configured corresponding to the third pixel electrode 133, so that the third sub-pixel unit PU3 displays the color corresponding to the third color conversion layer 143 under the control of the third active element 153. Preferably, the third pixel electrode 133 has only the fifth slit 133a and the sixth slit 133b. The fifth slit 133a extends substantially in the first direction 190a, and the sixth slit 133b extends substantially in the second direction 190b, but is not limited thereto. In some embodiments, the length of the fifth slit 133a is greater than the length of the sixth slit 133b, but is not limited thereto. The fifth slit 133a and the sixth slit 133b are substantially staggered. The fifth slit 133a has a fifth width SBa in the second direction 190b, and the sixth slit 133b has a sixth width SBb in the first direction 190a. The fifth width SBa of the fifth slit 133a is larger than the first width SRa of the first slit 131a and the third width SGa of the third slit 132a.

In this embodiment, the first color conversion layer 141, the second color conversion layer 142, and the third color conversion layer 143 are disposed on the inner surface of the second substrate 180. In other words In other words, the first substrate 110 may constitute a structure of a non-color conversion on array (non-COA) substrate, but the present invention is not limited thereto. In other embodiments, the first color conversion layer 141, the second color conversion layer 142, and the third color conversion layer 143 may also be disposed on the first substrate 110 to form a color conversion layer on the pixel array (color conversion on array; COA) structure. In some embodiments, the first color conversion layer 141, the second color conversion layer 142, and / or the third color conversion layer 143 may include a color filter (CF), or other types of color conversion layers, but The invention is not limited to this. For example, the first color conversion layer 141, the second color conversion layer 142, and / or the third color conversion layer 143 may also include a quantum dot (rod) layer (QD film), a fluorescent layer, or other types of color conversion. A layer, or a combination of a color filter and at least one of the foregoing. The first color conversion layer 141, the second color conversion layer 142, and the third color conversion layer 143 may be separated from each other by a light shielding layer 183. The light-shielding layer 183 is, for example, a black matrix, but the present invention is not limited thereto.

In this embodiment, the first width SRa of the first slit 131a is substantially equal to the third width SGa of the third slit 132a, and the first width SRa of the first slit 131a is larger than the second width of the second slit 131b SRb, and the third width SGa of the third slit 132a is larger than the fourth width SGb of the fourth slit 132b, but the present invention is not limited thereto.

In this embodiment, the fifth width SBa of the fifth slit 133a is larger than the sixth width SBb of the sixth slit 133b, but the present invention is not limited thereto.

In the present embodiment, the fifth width SBa of the fifth slit 133a is substantially greater than or equal to about 3.46 microns and less than or equal to about 4.23 microns, but the present invention is not limited thereto.

In this embodiment, the thickness 143h of the third color conversion layer 143 is larger than that of the third color conversion layer 143. A thickness 141 h of one color conversion layer 141 and a thickness 142 h of the second color conversion layer 142. For example, the first color conversion layer 141 is a red color conversion layer, the second color conversion layer 142 is a green color conversion layer, and the third color conversion layer 143 is a blue color conversion layer, but the present invention is not limited thereto. In a general display panel, generally, the higher the driving voltage of the pixel unit, the corresponding color light emitted by the pixel unit may have a higher light intensity. However, the materials of the red color conversion layer, the green color conversion layer, and the blue color conversion layer are different from each other. In order to achieve substantially the same driving voltage, the light intensity emitted by the red pixel unit, the light intensity emitted by the green pixel unit, and the light intensity emitted by the blue pixel unit may be more consistent, so that the blue The thickness of the color conversion layer is greater than the thickness of the red color conversion layer and the green color conversion layer.

In this embodiment, the display medium layer 170 corresponding to the first color conversion layer 141 has a first thickness GapR, the display medium layer 170 corresponding to the second color conversion layer 142 has a second thickness GapG, and the third color conversion layer 143 The corresponding display medium layer 170 has a third thickness GapB, and the third thickness GapB is smaller than the first thickness GapR and the second thickness GapG.

In some embodiments, the fifth width SBa has a first slit ratio (labeled as: SBa / SRa) to the first width SRa, and the first thickness GapR has a first thickness ratio (labeled as: GapR / GapB), and the first slit ratio (SBa / SRa) and the first thickness ratio (GapR / GapB) basically satisfy the following relationship: ((GapR / GapB) × (1-5%)) ≦ (SBa / Sra ) ≦ ((GapR / GapB) × (1 + 5%)).

In some embodiments, the fifth width SBa to the third width SGa has a second slit ratio (labeled as: SBa / SGa), and the second thickness GapG to the third thickness GapB has a second thickness ratio (labeled as: GapG / GapB), and the second slit ratio (SBa / SGa) and the second thickness ratio (GapG / GapB) basically satisfy the following relationship: ((GapG / GapB) × (1-5%)) ≦ (SBa / SGa ) ≦ ((GapG / GapB) × (1 + 5%)).

FIG. 2 is a schematic top view of a display panel according to a second embodiment of the present invention. 1A and FIG. 2 at the same time, the display panel 200 of the second embodiment is similar to the display panel 100 of the first embodiment, except that the slits 231a and 231b of the first pixel electrode 231 and the second pixel electrode 232 The slits 232a, 232b and the slits 233a, 233b of the third pixel electrode 233 may have different arrangements.

In this embodiment, preferably, the first pixel electrode 231 has only a first slit (or may be referred to as a first main slit) 231a and a second slit (or may be referred to as a second main slit) 231b. The first slit 231a extends substantially in the first direction 190a, and the second slit 231b extends substantially in the second direction 190b. In some embodiments, the length of the first slit 231a is greater than the length of the second slit 231b, but is not limited thereto. The first slit 231a and the second slit 231b are substantially staggered. The first slit 231a has a first width SRa in the second direction 190b, and the second slit 231b has a second width SRb in the first direction 190a. Preferably, the second pixel electrode 232 has only a third slit (or may be referred to as a third main slit) 232a and a fourth slit (or may be referred to as a fourth main slit) 232b. The third slit 232a extends substantially in the first direction 190a, and the fourth slit 232b extends substantially in the second direction 190b. In some embodiments, the third slit 232a The length is greater than the length of the fourth slit 232b, but is not limited thereto. The third slit 232a and the fourth slit 232b are substantially staggered. The third slit 232a has a third width SGa in the second direction 190b, and the fourth slit 232b has a fourth width SGb in the first direction 190a. Preferably, the third pixel electrode 233 has only a fifth slit (or may be referred to as a fifth main slit) 233a and a sixth slit (or may be referred to as a sixth main slit) 233b. The fifth slit 233a extends substantially in the first direction 190a, and the sixth slit 233b extends substantially in the second direction 190b. In some embodiments, the length of the fifth slit 233a is greater than the length of the sixth slit 233b, but is not limited thereto. The fifth slit 233a and the sixth slit 233b are substantially staggered. The fifth slit 233a has a fifth width SBa in the second direction 190b, and the sixth slit 233b has a sixth width SBb in the first direction 190a. The fifth width SBa of the fifth slit 233a is larger than the first width SRa of the first slit 231a and the third width SGa of the third slit 232a.

In this embodiment, the first width SRa of the first slit 231a, the second width SRb of the second slit 231b, the third width SGa of the third slit 232a, and the fourth width SGb of the fourth slit 232b are mutually Substantially the same, but the present invention is not limited to this.

In the present embodiment, the fifth width SBa of the fifth slit 233a is substantially equal to the sixth width SBb of the sixth slit 233b, but the present invention is not limited thereto.

FIG. 3 is a schematic partial top view of a display panel according to a third embodiment of the present invention. 1A and FIG. 3 at the same time, the display panel 300 of the third embodiment is similar to the display panel 100 of the first embodiment, except that the slits 331a and 331b of the first pixel electrode 331 and the second pixel electrode 332 are similar. The slits 332a, 332b and the slits 333a, 333b of the third pixel electrode 333 may have different arrangements.

In this embodiment, preferably, the first pixel electrode 331 has only a first slit (or may be referred to as a first main slit) 331a and a second slit (or may be referred to as a second main slit) 331b. The first slit 331a extends substantially in the first direction 190a, and the second slit 331b extends substantially in the second direction 190b. In some embodiments, the length of the first slit 331a is greater than the length of the second slit 331b, but is not limited thereto. The first slit 331a and the second slit 331b are substantially staggered. The first slit 331a has a first width SRa in the second direction 190b, and the second slit 331b has a second width SRb in the first direction 190a. Preferably, the second pixel electrode 332 has only a third slit (or may be referred to as a third main slit) 332a and a fourth slit (or may be referred to as a fourth main slit) 332b. The third slit 332a extends substantially in the first direction 190a, and the fourth slit 332b extends substantially in the second direction 190b. In some embodiments, the length of the third slit 332a is greater than the length of the fourth slit 332b, but is not limited thereto. The third slit 332a and the fourth slit 332b are substantially staggered. The third slit 332a has a third width SGa in the second direction 190b, and the fourth slit 332b has a fourth width SGb in the first direction 190a. Preferably, the third pixel electrode 333 has only a fifth slit (or may be referred to as a fifth main slit) 333a and a sixth slit (or may be referred to as a sixth main slit) 333b. The fifth slit 333a extends substantially in the first direction 190a, and the sixth slit 333b extends substantially in the second direction 190b. In some embodiments, the length of the fifth slit 333a is greater than the length of the sixth slit 333b, but is not limited thereto. The fifth slit 333a and the sixth slit 333b are substantially staggered. The fifth slit 333a has a fifth width SBa in the second direction 190b, and the sixth slit 333b has a sixth width SBb in the first direction 190a. The fifth width SBa of the fifth slit 333a is larger than the first width SRa and the first width SRa of the first slit 331a. The third width SGa of the three slits 332a.

In this embodiment, the first width SRa of the first slit 331a may be substantially equal to the second width SRb of the second slit 331b, but the present invention is not limited thereto.

In this embodiment, the fifth width SBa of the fifth slit 333a is larger than the sixth width SBb of the sixth slit 333b, and the first width SRa of the first slit 331a and the second width SRb of the second slit 331b The sixth width SBb is larger than the sixth slit 333b, but the present invention is not limited thereto.

In some embodiments, the fifth width SBa of the fifth slit 333a is greater than the sixth width SBb of the sixth slit 333b, and the first width SRa of the first slit 331a and the second width SRb of the second slit 331b And the sixth width SBb of the sixth slit 333b may be substantially the same as each other.

FIG. 4 is a schematic top view of a display panel according to a fourth embodiment of the present invention. 1A and FIG. 4 at the same time, the display panel 400 of the fourth embodiment is similar to the display panel 100 of the first embodiment, except that the slits 431a, 431b, and the second pixel electrode 432 of the first pixel electrode 431 are different. The slits 432a, 432b and the slits 433a, 433b of the third pixel electrode 433 may have different configurations.

In this embodiment, preferably, the first pixel electrode 431 has only a first slit (or may be referred to as a first main slit) 431a and a second slit (or may be referred to as a second main slit) 431b. The first slit 431a extends substantially in the first direction 190a, and the second slit 431b extends substantially in the second direction 190b. In some embodiments, the length of the first slit 431a is greater than the length of the second slit 431b, but is not limited thereto. The first slit 431a and the second slit 431b are substantially staggered to form a first staggered point 431c. First A slit 431a has a first width SRa in the second direction 190b, and a second slit 431b has a second width SRb in the first direction 190a. Preferably, the second pixel electrode 432 has only a third slit (or may be referred to as a third main slit) 432a and a fourth slit (or may be referred to as a fourth main slit) 432b. The third slit 432a extends substantially in the first direction 190a, and the fourth slit 432b extends substantially in the second direction 190b. In some embodiments, the length of the third slit 432a is greater than the length of the fourth slit 432b, but is not limited thereto. The third slit 432a and the fourth slit 432b are substantially staggered to form a second staggered point 432c. The third slit 432a has a third width SGa in the second direction 190b, and the fourth slit 432b has a fourth width SGb in the first direction 190a. Preferably, the third pixel electrode 433 has only a fifth slit (or may be referred to as a fifth main slit) 433a and a sixth slit (or may be referred to as a sixth main slit) 433b. The fifth slit 433a extends substantially in the first direction 190a, and the sixth slit 433b extends substantially in the second direction 190b. In some embodiments, the length of the fifth slit 433a is greater than the length of the sixth slit 433b, but is not limited thereto. The fifth slit 433a and the sixth slit 433b are substantially staggered to form a third staggered point 433c. The fifth slit 433a has a fifth width SBa1, SBa2 in the second direction 190b, and the sixth slit 433b has a sixth width SBb in the first direction 190a.

In this embodiment, the fifth width SBa1, SBa2 of the fifth slit 433a increases from the third interlaced point 433c to both ends of the fifth slit 433a in a direction that is the same / opposite to the first direction 190a. That is, the fifth width SBa1, SBa2 of the fifth slit 433a includes a minimum width SBa1 and a maximum width SBa2, and the maximum width SBa2 is larger than the first width SRa and the third slit 432a of the first slit 431a. The third width SGa.

In some embodiments, the maximum width SBa2 of the fifth width SBa2 of the fifth slit 433a is substantially greater than or equal to about 3.46 microns and less than or equal to about 4.23 microns, but the present invention is not limited thereto.

In some embodiments, similar to the fifth slit 433a, the first width SRa of the first slit 431a may also increase from the first staggered point 431c to both ends of the first slit 431a, and / or the third slit The third width SGa of 432a may be increased from the second staggered point 432c to both ends of the third slit 432a. Moreover, the maximum width SBa2 of the fifth width SBa2 of the fifth slit 433a is larger than the maximum width of the first width SRa of the first slit 431a, and / or the maximum width SBa2 of the fifth width SBa2 of the fifth slit 433a is greater than The maximum width of the third width SGa of the three slits 432a.

In order to prove that the display panel of the present invention can improve the problems of insufficient color saturation and color shift of the display screen, the following test examples are taken as illustrations. However, these test cases are not to be construed as limiting the scope of the present invention in any sense.

In the following comparative examples and test examples, an actual display panel is used to photograph a display screen in the same manner under an optical microscope to determine the image quality of the display panel. In addition, in addition to observing the display screen with the naked eye, to actually understand whether the display panel has problems such as insufficient color saturation and color shift, it can also correspond to the grayscale values of red, green, and blue colors and standardized brightness. Relationship to determine whether the display panel has problems such as insufficient color saturation and color shift.

Please refer to FIG. 1A and FIG. 1B at the same time. In the following comparative examples and test examples, if shown in FIG. 1A and FIG. 1B, the first sub-pixel unit PU1 and the second sub-picture The pixel unit PU2 and the third sub-pixel unit PU3 are respectively a red pixel unit, a green pixel unit, and a blue pixel unit. In addition, compared with the red color conversion layer of the red pixel unit and the green color conversion layer of the green pixel unit, the blue color conversion layer of the blue pixel unit has a thicker thickness. That is, compared with the display medium layer 170 of the red pixel unit and the display medium layer 170 of the green pixel unit, the display medium layer 170 corresponding to the blue pixel unit has a smaller thickness.

FIG. 5A is a display screen of a display panel 500 according to a comparative example of the present invention photographed under an optical microscope. FIG. 5B is a graph showing the correspondence between the grayscale value of each color and the normalized brightness in a display panel of a comparative example of the present invention in different directions. In Figure 5B, to R _V, G _V and the curve indicated B _V, respectively, is about 60 degrees to the viewing angle in a first direction 190a (i.e., the display panel vertical side direction H) of red, green and blue gray The relationship curve between the order value and the normalized brightness (or normalized brightness). The curves marked by R _H , G _H and B _H are the red, green and blue grayscale values and normalized brightness of a viewing angle of about 60 degrees in the second direction 190b (ie, the horizontal side view direction V of the display panel). Correspondence curve. Among them, the grayscale value is unitless, and the standardized brightness is unitless.

Please refer to FIGS. 1A, 1B, and 5A at the same time. The display panel 500 of the comparative example is similar to the display panel 100 of the first embodiment, except that in the display panel 500 of the comparative example, each sub-pixel unit PU1, PU2, The cross-shaped slits of PU3 have the same width.

In the display panel 500 of the comparative example, the width of the first slit 531a, the width of the second slit 531b, the width of the third slit 532a, and the width of the fourth slit 532b Degrees, the width SBa of the fifth slit 533a, and the width SBb of the sixth slit 533b are substantially the same.

In the display panel 500 of the comparative example, since the display medium layer corresponding to the blue pixel unit generally has a small thickness, the display medium layer corresponding to the blue pixel unit is most sensitive to the influence of the electric field. Therefore, under high driving voltage (eg, about 20V), as shown in FIG. 5A, it may be seen with the naked eye that the blue pixel unit has dark streaks, resulting in insufficient color saturation and color shift of the display panel 500. problem.

In addition, as shown in FIG. 5B, in the display panel 500 of the comparative example, in the vertical side view direction H and the horizontal side view direction V, the relationship between the grayscale values of red R and green G and the normalized brightness can be changed. Yu consistent. However, in the vertical side view direction H and the horizontal side view direction V, the relationship curve between the grayscale value of blue B and the standardized brightness is significantly divergent. Therefore, the color saturation of the display panel 500 is insufficient and the color shift is caused. And other issues.

FIG. 6A is a display screen image taken by a display panel of a first test example of the present invention under an optical microscope. FIG. 6B is a graph showing the correspondence between the grayscale value of each color and the normalized brightness of the display panel in the first test example of the present invention in different directions. In FIG. 6B, the curves marked with R _V , G _V, and B _V are red, green, and blue gray, respectively, at a viewing angle of about 60 degrees in the first direction 190a (that is, the vertical side view direction H of the display panel). The relationship curve between the order value and the normalized brightness (or normalized brightness). The curves marked by R _H , G _H and B _H are the red, green and blue grayscale values and normalized brightness of a viewing angle of about 60 degrees in the second direction 190b (ie, the horizontal side view direction V of the display panel). Correspondence curve. Among them, the grayscale value is unitless, and the standardized brightness is unitless.

Please refer to FIG. 1A, FIG. 1B, and FIG. 6A to FIG. 6B together. The display panel of the first test example may be a specific implementation of the display panel 100 of the first embodiment. As shown in FIG. 1A, in the display panel of the first test example, the first width SRa of the first slit 131a, the second width SRb of the second slit 131b, the third width SGa of the third slit 132a, and The fourth width SGb of the fourth slit 132b is substantially the same. The fifth width SBa is larger than the first width SRa and the third width SGa, and the fifth width SBa is larger than the sixth width SBb.

As shown in FIG. 6A, compared with the comparative example (as shown in FIG. 5A), the display panel of the first test example may have better image quality when the display panel is seen with the naked eye.

In addition, as shown in FIG. 6B, the display panel of the first test example has the grayscale values and standardization of red R, green G, and blue B regardless of the vertical side viewing direction H and the horizontal side viewing direction V. The relationship curve of brightness can be made uniform. Therefore, the color saturation of the display panel can be improved by using general gamma correction, and problems such as color shift can also be reduced.

FIG. 7A is a display screen image of a display panel of a second test example of the present invention taken under an optical microscope. FIG. 7B is a curve diagram of the correspondence between the grayscale value of each color and the normalized brightness of the display panel in the second test example of the present invention in different directions. In Figure 7B, to R _V, G _V and the curve indicated B _V, respectively, is about 60 degrees to the viewing angle in a first direction 190a (i.e., the display panel vertical side direction H) of red, green and blue gray Correspondence curve of order value and normalized brightness. The curves marked by R _H , G _H and B _H are the red, green and blue grayscale values and normalized brightness of a viewing angle of about 60 degrees in the second direction 190b (ie, the horizontal side view direction V of the display panel). (Or normalized brightness).

Please refer to FIG. 2 and FIGS. 6A to 6B at the same time. The display panel of the second test example may be a specific implementation of the display panel 200 of the second embodiment. As shown in FIG. 2, in the display panel of the second test example, the first width SRa of the first slit 131a, the second width SRb of the second slit 131b, the third width SGa of the third slit 132a, and The fourth width SGb of the fourth slit 132b is substantially the same. The fifth width SBa of the fifth slit 133a and the sixth width SBb of the sixth slit 133b are substantially the same. The fifth width SBa is larger than the first width SRa and the third width SGa.

As shown in FIG. 7A, compared with the comparative example (as shown in FIG. 5A), the display panel of the second test example may have better image quality when the display panel is seen with the naked eye.

In addition, as shown in FIG. 7B, the display panel of the second test example has the grayscale values and standardization of red R, green G, and blue B regardless of the vertical side viewing direction H and the horizontal side viewing direction V The relationship curve of brightness can be made uniform. Therefore, the color saturation of the display panel can be improved by general gamma correction, and problems such as color cast can also be reduced.

In summary, in the display panel of the present invention, the first pixel electrode has only a first slit and a second slit that are interlaced with each other, and the second pixel electrode has only a third slit and a fourth slit that are interlaced with each other. And the third pixel electrode has only a fifth slit and a sixth slit that are staggered with each other, and the fifth width of the fifth slit is greater than the first width of the first slit and the third width of the third slit . Therefore, the display panel can improve the problems of insufficient color saturation and color shift of the display screen, and has better image quality.

Although the present invention has been disclosed as above with the examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims (12)

A display panel includes: a first substrate; at least one pixel unit disposed on the first substrate, wherein the at least one pixel unit is electrically connected to at least one signal line extending along a first direction, and The at least one pixel unit includes: a first sub-pixel unit, including: a first pixel electrode, wherein the first pixel electrode has only a first slit and a second slit, wherein the first The slit extends along the first direction, and the second slit extends along a second direction and intersects with the first slit, wherein the first direction is different from the second direction, and the first slit is at The second direction has a first width, and the second slit has a second width in the first direction. A second sub-pixel unit includes: a second pixel electrode, wherein the second pixel The element electrode has only a third slit extending along the first direction and a fourth slit extending along the second direction and interlaced with the third slit, and the third slit has the second direction A third width, and the fourth slit has a fourth width in the first direction; And a third sub-pixel unit, including: a third pixel electrode, wherein the third pixel electrode has only a fifth slit extending along the first direction and extending along the second direction and connecting with the first One of the six slits intersected by five slits, the fifth slit has a fifth width in the second direction, and the sixth slit has a sixth width in the first direction, wherein the fifth width Big At the first width and the fifth width is greater than the third width; a second substrate on the first substrate; and a display medium layer between the first substrate and the second substrate. The display panel according to item 1 of the scope of patent application, wherein: the first width is equal to the third width; the first width is greater than the second width; and the third width is greater than the fourth width. The display panel according to item 1 of the scope of patent application, wherein: the first width is equal to the third width; the first width is equal to the second width; and the third width is equal to the fourth width. The display panel according to item 1 of the scope of patent application, wherein the fifth width is greater than or equal to the sixth width. The display panel according to item 1 of the scope of patent application, wherein the fifth width is between 3.46 microns and 4.23 microns. The display panel according to item 1 of the scope of patent application, wherein the fifth width has a first slit ratio (SBa / SRa) to the first width, and the fifth width has a second slit ratio to the third width. Slit ratio (SBa / SGa), the first thickness has a first thickness ratio (GapR / GapB) to the third thickness, the second thickness has a second thickness ratio (GapG / GapB) to the third thickness, And the first slit ratio and the first thickness ratio satisfy the following relationship: (GapR / GapB) × (1-5%) ≦ SBa / SRa ≦ (GapR / GapB) × (1+ 5%); or the ratio of the second slit ratio to the second thickness ratio satisfies the following relationship: (GapG / GapB) × (1-5%) ≦ SBa / SGa ≦ (GapG / GapB) × (1 + 5% ). The display panel according to item 1 of the scope of patent application, wherein the first sub-pixel unit, the second sub-pixel unit and the third sub-pixel unit have a long side and a short side, respectively. A slit, the third slit and the fifth slit are respectively parallel to the long side, the second slit, the fourth slit and the sixth slit are respectively parallel to the short side, and the first slit Is longer than the length of the second slit, the third slit is longer than the fourth slit, and the fifth slit is longer than the sixth slit. The display panel according to item 7 of the scope of patent application, wherein the first slit and the second slit are staggered, the third slit and the fourth slit are staggered, and the fifth slit and the sixth slit are staggered. The slits are staggered to form a staggered point, and the fifth width is increased from the staggered point to both ends of the fifth slit. The maximum width of the fifth width is larger than the first width and the third width. The display panel according to item 8 of the scope of patent application, wherein: the first width is increased from the interlaced point to both ends of the first slit; the third width is from the interlaced point to the third slit The two ends of the second width increase; and the maximum width of the fifth width is greater than the maximum width of the first width and the maximum width of the third width. The display panel according to item 1 of the scope of patent application, wherein: The display medium layer corresponding to the first sub-pixel unit has a first thickness; the display medium layer corresponding to the second sub-pixel unit has a second thickness; and the display corresponding to the third sub-pixel unit The dielectric layer has a third thickness, and the third thickness is smaller than the first thickness and the second thickness. The display panel according to item 10 of the patent application scope, wherein: the first sub-pixel unit further includes a first color conversion layer having a fourth thickness; the second sub-pixel unit further includes a first The second color conversion layer with five thicknesses; and the third sub-pixel unit further includes a third color conversion layer with a sixth thickness, wherein the sixth thickness is greater than the fourth thickness and the fifth thickness. The display panel according to item 11 of the scope of patent application, wherein: the first color conversion layer is a red color conversion layer; the second color conversion layer is a green color conversion layer; and the third color conversion layer is Blue color conversion layer.