CN111384089A

CN111384089A - Display panel and terminal

Info

Publication number: CN111384089A
Application number: CN201811639943.3A
Authority: CN
Inventors: 高静
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2020-07-07

Abstract

The present disclosure relates to a display panel including: a plurality of organic light emitting diodes; wherein the organic light emitting diode includes a transparent cathode. According to the embodiment of the disclosure, the transparent cathode can be arranged in the organic light emitting diode, and compared with the cathode made of the magnesium and silver composite alloy, the transparent cathode has higher transmittance and lower reflectivity, so that the overall transmittance of the display panel can be improved, and light can smoothly pass through the display panel.

Description

Display panel and terminal

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a display panel and a terminal.

Background

With the improvement of the requirement of the user on the display effect of the mobile phone, mobile phone manufacturers continuously improve the area proportion of the screen on the front side of the mobile phone to meet the requirements of the user.

However, due to the existence of the front camera, in order to arrange the front camera on the front face of the mobile phone, the area ratio of the screen on the front face of the mobile phone is inevitably influenced.

Disclosure of Invention

The present disclosure provides a display panel and a terminal to solve the disadvantages of the related art.

According to a first aspect of embodiments of the present disclosure, there is provided a display panel including:

a plurality of organic light emitting diodes;

wherein the organic light emitting diode includes a transparent cathode.

Optionally, the transparent cathode is comprised of a transparent metal oxide.

Optionally, the transparent cathode is composed of a simple metal.

Optionally, the transparent cathode is comprised of a metal alloy.

Optionally, the organic light emitting diode further comprises:

an electron injection layer.

Optionally, the display panel further comprises:

a pixel defining layer disposed between adjacent ones of the organic light emitting diodes;

wherein the material of the pixel defining layer is an inorganic material, and the thickness of the pixel defining layer is the same as that of the organic light emitting diode.

Optionally, the display panel further comprises:

the transparent filling layer is arranged above the organic light-emitting diode, the surface of the transparent filling layer is flat, and the surface of the transparent filling layer is flush with the surface of the pixel defining layer; or the transparent filling layer is arranged above the organic light-emitting diode and the pixel defining layer, and the surface of the transparent filling layer is flat.

According to a second aspect of the embodiments of the present disclosure, there is provided a terminal, including:

a display panel including a first display region and a second display region;

the first display region includes a plurality of organic light emitting diodes;

wherein the organic light emitting diode includes a transparent cathode.

Optionally, the terminal further includes:

the image acquisition equipment is arranged on one side, far away from the light emitting direction, of the first display area.

Optionally, an area of a sub-pixel in the first display region is larger than an area of a sub-pixel in the second display region.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

according to the embodiment of the disclosure, the transparent cathode can be arranged in the organic light emitting diode, and compared with the cathode made of the magnesium and silver composite alloy, the transparent cathode has higher transmittance and lower reflectivity, so that the overall transmittance of the display panel can be improved, and light can smoothly pass through the display panel.

And then will when display panel is applied to image acquisition equipment, can set up image acquisition equipment in display panel below, because light can pass display panel entering image acquisition equipment smoothly for image acquisition equipment can gather clear image, thereby needn't openly set up image acquisition equipment at the terminal, is favorable to improving the display panel at the positive area ratio of terminal.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram illustrating a display panel according to an embodiment of the present disclosure.

Fig. 2 is a schematic diagram illustrating another display panel according to an embodiment of the present disclosure.

Fig. 3 is a schematic diagram illustrating yet another display panel according to an embodiment of the present disclosure.

Fig. 4 is a schematic diagram showing an arrangement of sub-pixels based on the related art.

Fig. 5 is a schematic diagram illustrating an arrangement of sub-pixels in a display panel according to an embodiment of the disclosure.

Fig. 6 is a schematic diagram illustrating an arrangement of sub-pixels in another display panel according to an embodiment of the present disclosure.

Fig. 7 is a schematic diagram illustrating an arrangement of sub-pixels in another display panel according to an embodiment of the present disclosure.

Fig. 8 is a schematic block diagram illustrating a terminal according to an embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The embodiment of the present disclosure provides a display panel, which may be applied to a terminal as a screen, where the terminal may be an electronic device such as a mobile phone, a tablet computer, and a personal computer.

The display panel includes:

a plurality of organic light emitting diodes;

wherein the organic light emitting diode includes a transparent cathode.

Since the cathode of the organic light emitting diode in the related art is generally made of a magnesium and silver composite alloy, the transmittance of silver is low and the organic light emitting diode has high reflectivity, which may seriously affect the light transmission through the display panel.

And then will when display panel is applied to image acquisition equipment, can set up image acquisition equipment in display panel below, because light can pass display panel smoothly and get into image acquisition equipment for clear image can be gathered to image acquisition equipment, thereby needn't openly set up image acquisition equipment at the terminal, be favorable to improving the display panel at the positive area ratio (screen ratio) of terminal.

Optionally, the transparent cathode is comprised of a transparent metal oxide.

In one embodiment, the transparent metal oxidized material comprises at least one of:

indium tin oxide, indium gallium zinc oxide.

The transparent metal made of the material is oxidized to be used as a cathode, and compared with a cathode made of a composite alloy of magnesium and silver, the transparent metal has high transmittance and low reflectivity, and the overall transmittance of the display panel can be improved.

It should be noted that indium tin oxide and indium gallium zinc oxide are just a few of the options for transparent metal oxide materials that are examples of the present disclosure, and the present disclosure can also make the cathode from other metal oxides with higher transmittance.

Optionally, the transparent cathode is composed of a simple metal.

aluminum, magnesium, calcium, silver, lithium.

The cathode is made of the metal simple substance of the material, and compared with the cathode made of the composite alloy of magnesium and silver, the cathode is high in transmittance and low in reflectivity, and the overall transmittance of the display panel can be improved.

It should be noted that aluminum, magnesium, calcium, silver, and lithium are just a few choices for the simple metal substance exemplified in the present disclosure, and the cathode may also be formed by other simple metal substances with higher transmittance in the present disclosure.

Optionally, the transparent cathode is comprised of a metal alloy.

In one embodiment, the material of the metal alloy comprises at least one of:

lithium aluminum alloy, calcium aluminum alloy.

The cathode is made of the metal alloy of the materials, and compared with the cathode made of the composite alloy of magnesium and silver, the cathode is high in transmittance and low in reflectivity, and the overall transmittance of the display panel can be improved.

It should be noted that lithium aluminum alloy and calcium aluminum alloy are only a few choices for metal alloys as examples of the present disclosure, and the present disclosure may also constitute the cathode by other metal alloys with higher transmittance.

Optionally, the organic light emitting diode further comprises:

an electron injection layer.

In one embodiment, since the work function of the transparent cathode (e.g., a transparent cathode made by oxidizing a transparent metal, or a simple metal, or a metal alloy in the above embodiments) is higher than that of a composite alloy of magnesium and silver, and therefore, the ability of generating electrons is weak, for this reason, the embodiments of the present disclosure add an electron injection layer between the transparent cathode and the electron transport layer to assist the transparent cathode to generate electrons, so that enough electrons can be generated on the transparent cathode side of the organic light emitting diode to excite the organic material layer to emit light, thereby enabling the display panel to smoothly display images.

Optionally, the material of the electron injection layer comprises at least one of:

gadolinium, samarium, dysprosium, erbium, cerium and terbium.

The electron injection layer is made of the materials, and because the materials have low work functions, sufficient electrons can be conveniently generated to excite the organic material layer to emit light, so that the display panel can smoothly display images.

It should be noted that gadolinium, samarium, dysprosium, erbium, cerium and terbium are only examples of the electron injection layer, and the electron injection layer can be formed by other materials with lower work functions.

As shown in fig. 1, the display panel includes a pixel defining layer disposed between adjacent organic light emitting diodes. The pixel defining layer is generally made of an organic material, and a layer structure formed by the organic material is generally thicker, but the thickness of each layer structure in the organic light emitting diode is generally lower, so that after the organic light emitting diode is formed, a height difference exists between the surface of the organic light emitting diode and the surface of the pixel defining layer, and the display panel has more recesses in a macroscopic view.

And the border of the pixel definition layer is not vertical generally, but inclined, which can cause that light rays pass through the display panel, and the light path is changed when air medium in the recess enters the inclined border, and under the condition that the image acquisition equipment is arranged below the display panel, partial light rays are not injected into the image acquisition equipment below the display panel, so that the quality of the image acquired by the image acquisition equipment is influenced.

Although the organic light emitting diode is manufactured, a structure such as a cover glass is adhered to the surface of the organic light emitting diode, the adhesive for adhesion is thin and cannot fill the recess, which still causes the above-mentioned problems.

It should be noted that the structure shown in the drawings of the embodiments of the present disclosure is merely an exemplary illustration of the present disclosure.

For example, the display panel in fig. 1 may include transistors, but embodiments of the present disclosure may also be implemented based on a display panel that does not include transistors, for example, transistors fabricated on the periphery of the display panel.

Therefore, it should be understood that the structure shown in the drawings of fig. 1 and the structure shown in the drawings of the following embodiments are not intended to limit the embodiments of the present disclosure, but are merely one implementation manner of the embodiments of the present disclosure.

Fig. 2 is a schematic diagram illustrating another display panel according to an embodiment of the present disclosure. As shown in fig. 2, the display panel further includes:

a pixel defining layer 7 disposed between adjacent ones of the organic light emitting diodes; among them, the organic light emitting diode may include a cathode 6, an electron injection layer 11, an electron transport layer 12, an organic light emitting layer 9, a hole transport layer 14, a hole injection layer 13, and an anode 8.

In addition, the display panel may sequentially include a substrate 1, a buffer layer 2, a gate insulating layer 3, an interlayer dielectric layer 4, and a planarization layer 5 from bottom to top, and the driving transistor includes an active layer 16, a gate electrode 17, a source electrode 18, and a drain electrode 19.

Wherein the material of the pixel defining layer 7 is an inorganic material, and the thickness of the pixel defining layer 7 is the same as that of the organic light emitting diode.

The inorganic material includes at least one of:

silicon oxide, silicon nitride, silicon carbonitride.

According to the embodiment of the disclosure, the pixel defining layer can be formed by an inorganic material, and the inorganic material can form a layer structure by sputtering and evaporation process, so that compared with the layer structure formed by an organic material needing to be coated, the inorganic material can be made thinner, the thickness of the pixel defining layer is made to be the same as that of the organic light emitting diode, and therefore, a recess is not formed at a position corresponding to the organic light emitting diode, and the surface of the display panel is ensured to be flat.

Therefore, in the process that light rays pass through the display panel, on one hand, the light rays enter the inclined boundary from the transparent filling layer, and the refractive index of the transparent filling layer is larger than that of air, so that the light path change degree of the light rays is smaller relative to the condition that the light rays enter the inclined boundary from the air, and under the condition that the image acquisition equipment is arranged below the display panel, the light rays can be favorably ensured to enter the image acquisition equipment below the display panel; on the other hand, the surface of the display panel after the transparent filling layer is arranged is flat, so that diffraction caused by depression can be avoided to the greatest extent. Accordingly, the quality of the image collected by the image collecting equipment can be ensured.

Fig. 3 is a schematic diagram illustrating yet another display panel according to an embodiment of the present disclosure. As shown in fig. 3, the display panel further includes:

a pixel defining layer disposed between adjacent ones of the organic light emitting diodes; among them, the organic light emitting diode may include a cathode 6, an electron injection layer 11, an electron transport layer 12, an organic light emitting layer 9, a hole transport layer 14, a hole injection layer 13, and an anode 8.

A transparent filling layer 14 disposed above the organic light emitting diode, wherein the surface of the transparent filling layer is flat and flush with the surface of the pixel defining layer 7; or on the organic light emitting diode and the pixel defining layer 7, and the surface of the transparent filling layer 14 is flat.

According to an embodiment of the present disclosure, the material of the transparent filling layer includes at least one of:

OCA (optical Clear adhesive) optical cement, water cement and tetrafluoroethylene.

According to the embodiment of the present disclosure, a transparent filling layer may be disposed on the organic light emitting diode, and since the transparent filling layer may be disposed on the organic light emitting diode as shown in fig. 3, and has a flat surface and a surface flush with the surface of the pixel defining layer, or disposed on the organic light emitting diode and the pixel defining layer (not shown in the figure), the surface of the transparent filling layer is flat, in which case, the recess of the organic light emitting diode shown in fig. 1 may be filled, so as to ensure the flat surface of the display panel.

Therefore, in the process that light rays pass through the display panel, on one hand, the light rays enter the inclined boundary from the transparent filling layer, and the refractive index of the transparent filling layer is larger than that of air, so that the light path change degree of the light rays is smaller relative to the situation that the light rays enter the inclined boundary from the air, and under the condition that the image acquisition equipment is arranged below the display panel, the light rays can be favorably ensured to enter the image acquisition equipment below the display panel; on the other hand, the surface of the display panel after the transparent filling layer is arranged is flat, so that diffraction caused by depression can be avoided to the greatest extent. Accordingly, the quality of the image collected by the image collecting equipment can be ensured.

In addition to the above-described improvement of the transmittance of the display panel by adjusting the cathode material, the transmittance of the display panel may be improved according to the following embodiments.

In one embodiment, the sub-pixels in the pixel unit in the display panel are arranged in a matrix along a row direction and a column direction, and the distance between each sub-pixel in the sub-pixels in the same row in the column direction is 0, and the distance between each sub-pixel in the sub-pixels in the same column in the row direction is 0.

The structure can enable a slit which is obvious along the row direction to exist between sub-pixels of adjacent rows and a slit which is obvious along the column direction to exist between sub-pixels of adjacent columns, light can be diffracted when passing through the slits, the more neat the boundary of the slits, the stronger the diffraction effect is, and even the condition that light rays passing through the two slits are interfered can exist, and the more neat the boundary of the slits, the stronger the interference effect is.

Under the condition that image acquisition equipment is arranged below the display panel, if strong diffraction and interference phenomena occur to light passing through the display panel, obvious light and dark alternate stripes can be formed, so that the image acquired by the image acquisition equipment has the obvious light and dark alternate stripes, and the shooting effect is influenced.

According to an embodiment of the present disclosure, the display panel includes a plurality of pixel units, each pixel unit including a plurality of sub-pixels distributed along a row direction and a column direction;

and the distance between adjacent sub-pixels in the sub-pixels of the same row in the column direction is greater than 0, and/or the distance between adjacent sub-pixels in the sub-pixels of the same column in the row direction is greater than 0.

Based on the embodiment of the disclosure, by setting the distance between at least one sub-pixel in the sub-pixels of the same row and other sub-pixels in the column direction to be greater than 0, the slit boundaries in the row direction between the sub-pixels of adjacent rows can be irregular, so that the interference effect generated by the slits in the row direction is reduced. Similarly, by setting the distance between at least one sub-pixel in the sub-pixels in the same column and other sub-pixels in the row direction to be greater than 0, the slit boundaries in the column direction between the sub-pixels in adjacent columns can be irregular, thereby reducing the interference effect generated by the slits in the column direction. And then avoid the light through display panel to take place stronger diffraction or interference phenomenon to guarantee that there can not be comparatively obvious alternate light and shade stripe in the image that image acquisition equipment gathered under the display panel, be favorable to guaranteeing good shooting effect.

Next, taking the slits in the row direction as an example, the related art and the embodiment of the present disclosure are compared by fig. 4 and 5.

Fig. 4 is a schematic diagram showing an arrangement of sub-pixels based on the related art. Fig. 5 is a schematic diagram illustrating an arrangement of sub-pixels in a display panel according to an embodiment of the disclosure.

As shown in fig. 4 and 5, the pixel unit includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel.

In fig. 4, the distance in the column direction of all the sub-pixels in the red sub-pixels of the same row is equal to 0, and the distance in the column direction of all the sub-pixels in the green sub-pixels of the same row is equal to 0, which makes the boundaries of the slits in the row direction formed between the red sub-pixels and the green sub-pixels of the same row well-ordered.

In fig. 5, the distance between adjacent sub-pixels in the red sub-pixels of the same row in the column direction is greater than 0, and the distance between adjacent sub-pixels in the green sub-pixels of the same column in the row direction is greater than 0, which makes the boundaries of the slits in the row direction formed between the red sub-pixels of one row and the green sub-pixels of one row irregular.

Compared with the slit shown in fig. 4, the light is weak in diffraction and diffraction effects generated by the slit in fig. 5, and the arrangement mode of the sub-pixels in the display panel is set based on the embodiment, so that the phenomenon of strong diffraction or interference of the light passing through the display panel can be avoided, and therefore, the phenomenon that the light and the shade are alternated is not obvious in the image collected by the image collecting equipment under the display panel is ensured, and the good shooting effect is favorably ensured.

In one embodiment, the distance between adjacent sub-pixels in the sub-pixels of the same row in the column direction is greater than 0, and/or the distance between adjacent sub-pixels in the sub-pixels of the same column in the row direction is greater than 0. Therefore, the distance between the largest number of sub-pixels in the same row and other sub-pixels in the column direction is larger than 0, so that slit boundaries between the sub-pixels in adjacent rows in the row direction are irregular to a greater extent, and slit boundaries between the sub-pixels in adjacent columns in the column direction are irregular to a greater extent, and the phenomenon that light rays passing through the display panel are subjected to stronger diffraction or interference is favorably reduced.

In one embodiment, as shown in fig. 6, the distance between adjacent sub-pixels in the column direction is d1, and the distance between adjacent sub-pixels in the row direction is d 1/2.

According to the arrangement, the distance of the adjacent sub-pixels in the same row of sub-pixels in the column direction can be ensured to be the largest, so that the slit boundaries between the sub-pixels in the adjacent rows along the row direction are irregular to the greatest extent, and the phenomenon of strong diffraction or interference of light passing through the display panel is favorably reduced.

In one embodiment, as shown in fig. 7, the distance between adjacent sub-pixels in the row direction is d2, and the distance between adjacent sub-pixels in the column direction is d 2/2.

According to the arrangement, the distance between the adjacent sub-pixels in the same column of sub-pixels in the column direction can be ensured to be the largest, so that the slit boundaries between the sub-pixels in the adjacent columns in the column direction are irregular to the greatest extent, and the phenomenon of strong diffraction or interference of light rays passing through the display panel is favorably reduced.

In one embodiment, the signal lines of the sub-pixels of the same color are the same signal line.

Under the condition that the image acquisition device is arranged below the display panel, when the image acquisition device acquires an image, the image acquisition device needs to penetrate through the display panel to acquire the image on the front side of the terminal, but the display panel needs to be ensured to have a display function, so that the display panel needs to be ensured to have higher transmittance on the basis of having the display function.

According to the embodiment, signal lines of sub-pixels of the same color may be set to be the same signal line for the sub-pixels in the display panel, wherein the signal line includes at least one of:

a scan line, a signal line, and a driving current transmission line (i.e., a line connected to VDD for transmitting a current to the organic light emitting diode through the driving transistor).

For example, taking a scan line as an example, all red sub-pixels in the display panel are connected to one scan line, all green sub-pixels in the display panel are connected to one scan line, and all blue sub-pixels in the display panel are connected to one scan line, so that the display panel still has a certain display function, and the scan lines in the display panel are reduced to a great extent, thereby reducing the shielding of the scan lines on light rays, effectively improving the transmittance of the display panel, and ensuring that image acquisition equipment below the display panel can acquire clear images.

In addition, a signal line may be provided based on the embodiment shown in fig. 6 or fig. 7. Taking the scan line as an example, in order to connect all the red subpixels to one scan line, the red subpixels in the same row may be connected, and then one line is led out from each row of red subpixels to be connected to one scan line, and based on the embodiment shown in fig. 4 or 5, the distribution of the subpixels has strong regularity, so that the connection lines between the subpixels have strong regularity, which is beneficial to simplifying the patterning process for forming the connection lines.

In one embodiment, the sub-pixels of the same color in the pixel units in the same row are located in the same row, and the signal lines of the sub-pixels of the same color in the same row are the same signal line. A row of sub-pixels with the same color can be controlled by one signal line, so that the sub-pixels in the display panel can be controlled to be turned on and off in line granularity, and the display capability of the display panel is improved compared with the situation that the sub-pixels with all colors are connected to one signal box.

In one embodiment, the sub-pixels with the same color in the pixel units of the same column are located in the same column, and the signal lines of the sub-pixels with the same color in the same column are the same signal line. A column of sub-pixels with the same color can be controlled by one signal line, so that the sub-pixels in the display panel can be controlled to be turned on and off in a column granularity, and the display capability of the display panel can be improved compared with the situation that the sub-pixels with all colors are connected to one signal box.

In one embodiment, the display panel includes a plurality of sub-regions, wherein the signal lines of the sub-pixels of the same color in different sub-regions are different signal lines. Therefore, the sub-pixels with the same color in one sub-area can be controlled to be turned on or turned off through one signal line, namely, the display granularity of the display panel is the sub-area, and the display capability of the display panel is improved as compared with the situation that the sub-pixels with all colors are connected to one signal box.

An embodiment of the present disclosure further provides a terminal, where the terminal may be an electronic device such as a mobile phone, a tablet computer, and a personal computer, and the terminal includes:

a display panel including a first display region and a second display region;

the first display region includes a plurality of organic light emitting diodes;

wherein the organic light emitting diode includes a transparent cathode.

In one embodiment, the display panel may be the display panel described in any of the above embodiments.

In one embodiment, the display panel includes a first display region and a second display region, and the first region may have a high transmittance due to a high transmittance and a low reflectance with respect to a composite alloy of magnesium and silver in the related art by providing a transparent cathode in the organic light emitting diode.

Optionally, the terminal further includes:

the image acquisition equipment is arranged on one side, far away from the light emitting direction, of the first display area. The image acquisition equipment can be used as a front camera of the terminal.

In an embodiment, since the transmittance of the first display region is relatively high, for example, greater than that of the second display region, and the image acquisition device is disposed on the side of the first display region away from the light emitting direction, the image acquisition device can acquire an image of the side of the terminal where the display panel is disposed through the display panel, so that the image acquisition device does not need to be disposed on the front side of the terminal, which is beneficial to improving the area ratio (screen occupation ratio) of the display panel on the front side of the terminal.

In one embodiment, the area of the sub-pixels in the first display region is larger than the area of the sub-pixels in the second display region.

Because the image acquisition device is arranged below the first display area, when the image acquisition device acquires an image, the image on the front side of the terminal needs to be acquired through the first display area, but it needs to be ensured that the first display area has a display function, which needs to ensure that the first display area has a higher transmittance on the basis of having the display function, and at least the transmittance is higher than that of the second display area.

According to the embodiment, the area of the sub-pixels in the first display area is larger than that of the sub-pixels in the second display area, so that the number of the sub-pixels in the unit area of the first display area can be reduced, and the number of the sub-pixels in the unit area is smaller, so that the number of signal lines for connecting the sub-pixels is smaller, the shielding of the signal lines in the first display area on light rays can be reduced, the transmittance of the first display area is effectively improved, and clear images can be acquired by image acquisition equipment below the first display area.

Fig. 8 is a schematic block diagram illustrating a terminal 800 in accordance with an embodiment of the present disclosure. For example, the apparatus 800 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.

Referring to fig. 8, the apparatus 800 may include one or more of the following components: processing component 802, memory 804, power component 806, multimedia component 808, audio component 810, input/output (I/O) interface 812, sensor component 814, and communication component 816. The display panel of any one of the above embodiments is also included.

The processing component 802 generally controls overall operation of the device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operations at the apparatus 800. Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Power components 806 provide power to the various components of device 800. The power components 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the apparatus 800.

The multimedia component 808 includes a screen that provides an output interface between the device 800 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the apparatus 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for the device 800. For example, the sensor assembly 814 may detect the open/closed status of the device 800, the relative positioning of components, such as a display and keypad of the device 800, the sensor assembly 814 may also detect a change in the position of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, the orientation or acceleration/deceleration of the device 800, and a change in the temperature of the device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 816 is configured to facilitate communications between the apparatus 800 and other devices in a wired or wireless manner. The device 800 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an example embodiment, the apparatus 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic components.

In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 804 comprising instructions, executable by the processor 820 of the apparatus 800 is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A display panel, comprising:

a plurality of organic light emitting diodes;

wherein the organic light emitting diode includes a transparent cathode.

2. The display panel of claim 1, wherein the transparent cathode is comprised of a transparent metal oxide.

3. The display panel according to claim 1, wherein the transparent cathode is composed of a simple metal.

4. The display panel of claim 1, wherein the transparent cathode is comprised of a metal alloy.

5. The display panel according to any one of claims 1 to 4, wherein the organic light emitting diode further comprises:

an electron injection layer.

6. The display panel according to any one of claims 1 to 4, characterized by further comprising:

7. The display panel according to any one of claims 1 to 4, characterized by further comprising:

8. A terminal, comprising:

a display panel including a first display region and a second display region;

the first display region includes a plurality of organic light emitting diodes;

wherein the organic light emitting diode includes a transparent cathode.

9. The terminal of claim 8, further comprising:

10. A terminal as claimed in claim 8, characterised in that the area of sub-pixels in the first display region is greater than the area of sub-pixels in the second display region.