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常见问题

常见问题

Categories:
电子纸常见问题
2020-06-16 15:42:53
Answer

 

 

Please see following important safety instructions:

1. The nominal voltage of DC input to the A/D board is 12V, The size of DC current depends on the TFT    LCD panel, audio amplifier, etc. Please note that your AC/DC adapter's output plug need to match the DC input jack, the diameter of the jack is 5.5 mm.

2. Before connecting these input/output ports, Video port, it is strongly recommended that your turn off the A/D board and remove the DC 12V plug from the DC input jack.

3. Don’t put the A/D board into an airtight package. When it works, it will produce a certain heat.

4.  When assembling it, please use a suitable force; don’t distort the PCB and other components.

 

 

 

 

Categories:
电子纸常见问题
2020-06-16 15:42:53
Categories:
电子纸常见问题
2020-06-16 15:32:52
Answer


Q: Do you have more information about Bluetooth-communication between Access Processor and ESL Tag? Which standard is used?   
A: BLE4.0


Q: Which frequencies?
A: 2.4G


Q: Do you have any documents that use in Europe is allowed?
A: We're applying for the CE approval, and will get the certification in September.


Q: Is communication between Access Processor and ESL Tag protected/save?
A: Yes, it is protected.


Q: How can we avoid unauthorized access to the system?
A: The communication is encrypted by AES(Advanced Encryption Standard)


Q: You told me, that lifetime of ESL Tag is between 5 and 10 years. Can you also tell me the max. number of refreshes? In my opinion this value is better to calculate.
A: Yes, this value is worked out by calculation, as 4 time refresh per day and waked up once very 20 seconds.
   Standby current: 0.001mA
   Waked up peck current:10mA
   Refreshed peak current:20mA
   The aboved values can be measured
   A common CR2450 Electric quantity is 620mAh
So we can get the electric quantity for one hour
   Standby electric quantity:0.001x1=0.001 mAh
   Waked up electric quantity:3600/20x10x0.01/3600=0.005 mAh (as peak value)
   Refreshed  electric quantity:20x0.3x4/3600=0.0067 mAh (as peak value)
   The shortest lifetime of ESL tag is 620/(0.001+0.005+0.0067)/24/365=5.573 years
In fact, most ESL tags can't reach 4 time refresh per day, so we said that lifetime of ESL Tag is between 5 and 10 years.


Q: Am I right, that POE is possible for Power supply of Access Processor?
A: Yes, you are right, our current Access processor just support POE power supply, our engineer considered this one.

 

Categories:
电子纸常见问题
2020-06-16 15:32:52
Categories:
电子纸常见问题
2020-06-16 15:24:48
Answer

 

 

Q: What is the difference between an epaper matrix display and an epaper segmented display?
A: The underlying ePaper technology is very similar but is tuned to the needs of the different applications of a matrix display versus a segmented display.


Matrix displays are intended for applications requiring the display of many different forms of text and images. These displays comprise of a large array of pixels. These individual pixels are controlled by a TFT array similar to what you will have a typical computer monitor or TV screen.

Segmented displays are intended for applications where the display requirements can be met using predefined segments that can be turned on or off. This is similar to what one would see in a typical calculator with a numeric or alphanumeric display.

Basically will the display be made up of an array of pixels or by a collection of predefined shapes.

Q: What is E Ink's minimum purchase quantity for custom Segmented displays?
A: Good Display has a minimum quantity per order requirement of 10,000 units.


Q: Does Good Display have standard Segmented displays?
A: Good Display has several standard parts available at
good-display.com.


Q: What is the pricing for Good Display Segmented displays?
A: Good Display develops Segmented displays for its customers based upon the minimum quantity per order commitment of 10,000 units. Pricing is dependent upon volume, including a minimum quantity per order commitment of 10,000 units, overall display size, and the number of segments required for the display. Segmented epaper displays are generally more expensive than traditional TFT LCD and LED displays.


Q: What if volume is less than 10,000 units per order?
A: In some cases, Good Display standard epaper displays can be used for your design. They can be purchased at
buyepaper.com


Q: Does Good Display develop prototype Segmented epaper displays?
A: For those customers who are investigating an Segmented epaper display application, we provide a prototype development program. Good Display works with customers to finalize the specifications for the desired display. Based on the specifications Good Displat will provide a quote for the prototype design. Upon completion of the specifications and quote acceptance, first working samples can typically be delivered in 5 weeks. At the completion of the prototype, per unit mass production pricing is finalized.


Q: Can I use Segmented epaper displays for academic research, educational projects, or personal use?
A: Yes, we recommend that you use one or more of our standard displays, which can be purchased directly at
buyepaper.com.


Q: How large/small can Good Display Segmented epaper displays be?
A: The smallest Segmented display dimensions are approximately 6x6mm. The largest display is 600x400mm.


Q: What voltage is required to drive a Segmented epaper display?
A: Segmented epaper displays can be driven between 5 volts and 15 volts.


Q: How much power does an Segmented e-ink epaper display consume?
A: Segmented e-ink epaper displays are bi-stable; they do not consume power after an update. It takes of the order of microwatts to switch from one display state to another.


Q: What is the minimum number of segments that can be created with E-Ink epaper?
A: Segmented displays range from 1 to 200+ segments.

 

 

 

Categories:
电子纸常见问题
2020-06-16 15:24:48
Categories:
电子纸常见问题
2020-06-16 15:22:04
Answer

 

 

 

Product lifetime and Certifications

Q: What is the normal product lifetime of Good Display LCDs?
A: For standard products, it is a minimum of 3 years. If a model change is required due to component end of life, then we will try every effort to make the new module backward compatible.

Q: Do Good Display LCDs have CE certification?
A: CE certification is typically given to end products. Since the LCD is a component, it does not carry CE certification.

Q: Are your TFT LCDs RoHS compliant?
A: All of Good Display TFT LCDs are RoHS compliant. Please contact your Good Display sales representative for confirmation.


Image Quality & Performance

Q: What is the viewing angle of your LCDs?
A: All of our TFT LCDs meet or exceed 130 degree (Horizontal) and 110 degree (Vertical) viewing angle. Our wide view film technology achieve viewing angle 160 degree (Horizontal) and 140 degree(Vertical). We also have Super-Wide-View technology that will achieve 85/85/85/85 viewing angle, which is the best technology for viewing angle and color reproduction. Please consult the individual part specification for details.

Q: What is Natural Color Matrix (NCM) technology?
A: NCM enables vivid reproduction of even the most subtle colors, such as pastels and flesh tones, and provides independent control of six colors without one color influencing any of the others. It supports 18-bit and 24-bit color and full motion video and compensates for any color shifts caused by LCD components such as CCFLs and optical films. Read the NCM Technology WhitePaper.

Q: Are Good Display TFT LCDs sunlight readable?
A: There are basically two approches to increase a display's sunlight readability: increase the brightness level of the display, or reduce the ambient light reflection on the display surface. Good Display has several technology for outdoor readable applications, such as high brightness panel, transflective panel, anti-reflection and antiglare surface treatment, for more information, please check Outdoor Use TFT Displays for more information.

Q: Is the response time of your TFT LCDs enough for moving picture?
A: Yes. Good Display TFT LCDs response time is between 16ms to 25ms. Most of our newly developed LCD panels have 16ms response time, which is enough for moving picture. Please check the individual display specification for detail information.

Q: What is reverse scan function?
A: LCD displays typically feature a wider viewing angle from straight on or above, compared to the viewing angle from below. The reverse-scan feature enables customers to select either a normal scan or reverse scan to obtain the best intended image, depending on whether the mounted display will be viewed typically from above or below. Good Display TFT LCDs have reverse scan function.


Backlight

Q: What is the lifetime of a CCFL backlight?
A: The defination of the CCFL lifetime is when the brightness level droped to 50% of its initial full brightness level. All the CCFL backlights for TFT LCDs are rated at 50,000 hours minimum. But most of the CCFL lamp unit can be replaced easily.

Q: Are your backlights replaceable?
A: Most of our backlights for the active modules are serviceable. Please check the individual part specification for information on a specific LCM.

Q: What is the expected life of a LED backlight?
A: For industrial grade LED backlits TFT-LCD, the minimum lifetime is 60K hours. Be sure to consult the individual part specification for information on a specific LCM.

Q: How do I specify an inverter for an Good Display's LCD?
A: Most inverter manufacturers have a cross reference by LCD manufacturer.


Design & Specifications

Q: What is the temperature range of Good Display TFT LCDs?
A: For industrial application, operating temperature: -20 ~ 70 °C Storage temperature: -20 ~ 80 °C For automotive application, operating temperature: -40 ~ 80°C Storage temperature: -40 ~ 80 °C

Q: Will your TFT LCD Modules operate at 5V?
A: Many of the Good Display TFT LCDs operate at both 3.3 and 5V. However, as the 3.3V becomes the new standard, the LSI manufactory might decide to only support 3.3V, that is not controlled by Good Display. Please check the individual part specification for information.

Q: Is MTBF data available for Good Display's LCDs?
A: The Mean time between failures (MTBF) data is not generally available. Under special circumstances MTBF data can be provided, but this is the exception, not the norm. Please contact your representative for further information.

Q: Can Good Display provide initialization codes for their modules?
A: Yes, we can, you can find the initialization codes on our website under the diplay module part detail page.

 

 

 

 

Categories:
电子纸常见问题
2020-06-16 15:22:04
Categories:
电子纸常见问题
2020-06-15 16:22:01
Answer

 

Precautions for Tri-color E-paper Display

 

 

1.      Storage condition of Tri-color electronic paper display

1.1  Transportation conditions

Temperature range: -25~60℃

 

1.2  Storage condition

Temperature range: 20℃±5℃

Humidity range: 50±5%RH

Maximum storage time: 3 months

 

Note: When the three-color product is stored, the display screen should be kept white and face up. In addition, please be sure to refresh the e-paper every three months, and the final picture is a white screen.

 

2.      Refresh requirement

2.1  Refresh frequency of tri-color e-paper display

It is recommended that the refresh interval be at least 180 seconds

 

2.2 Three-color e-paper display refresh times

When the three-color e-paper display is refreshed, it is recommended to update the display at least every 24 hours.

 

2.3  Normal use conditions of the product

Temperature range: 0~40℃

Humidity range: 40%~70%RH

 

*Note: Avoid direct sunlight. For additional details, please check the product specification.

 

 

 

 

Categories:
电子纸常见问题
2020-06-15 16:22:01
Categories:
电子纸常见问题
2020-04-27 11:15:34
Answer

We have compiled all the collected e-paper FAQs into a small tool that allows customers to easily find out the answers themselves. If you have a need, please click here to view.

 

Q: Are your E-Paper Displays RoHS compliant?

A: All of Good Display E-Paper Displays are RoHS compliant.

 

 

Q: What is the difference between an Matrix display and an Segmented display?

A: The underlying ePaper technology is very similar but is tuned to the needs of the different applications of a Matrix display versus a Segmented display.

Matrix displays are intended for applications requiring the display of many different forms of text and images. These displays comprise of a large array of pixels. These individual pixels are controlled by a TFT array similar to what you will have a typical computer monitor or TV screen.

Segmented displays are intended for applications where the display requirements can be met using predefined segments that can be turned on or off. This is similar to what one would see in a typical calculator with a numeric or alphanumeric display.

Basically will the display be made up of an array of pixels or by a collection of predefined shapes.

 

Q: What is Good Display's minimum purchase quantity for Matrix e-paper displays? And what about the small size, for example, 2.9 inch? 

A: You can purchase one unit matrix display for standard products, but you must have 100,000 unit and even more volume for custom products, this varies based on the size and requirements of the display application and whether it is a custom or standard size display. It is best to discuss your requirements with a member of our sales team. And for the small size(less than 3.5 inches), the molding fee is about 100,000 US dollars, the MOQ is 500K.

 

Q: What is the pricing for Good Display Matrix E-ink displays?

A: Pricing for Matrix displays depends on volumes and whether the display is a custom or standard display. The main driver of pricing is the overall display size, whether the display is monochrome or color.

    And you can get the current pricing for Matrix E-ink displays from the following linking.  

➸ buy-lcd.com

➸ amazon.com

➸ aliexpress.com

➸ eink-display.com

 

Q: How large/small can Matrix e-ink displays be?

A: The size and shape of a Matrix e-ink display is totally dictated by the size of the electrical backplane that the FPL is laminated to. Displays can be very small or very large. E Ink has standard display modules. Almost any size and shape can be made depending on the volumes.

 At present, the largest e-ink display is 32 inch E-ink Display, and the smallest e-ink display is 1.02 inch E-ink Display.

 

Q: What voltage is required to drive a Matrix e-ink display?

A: The drive for E Ink displays is typically 15 volts. An ecosystem of electronic components exists for design of complete epaper systems.

 

Q: How much power does a Matrix e-ink display consume?

A: Matrix e-ink displays are bi-stable. This means that they only consume power while the display is being updated. No power is required to maintain an image after it has been updated. The power required to for the update process depends on the size of the display but is of the order of microwatts.

 

Q: Does Good Display have developer kits for Matrix products?

A: Yes there are E-ink display developer kits available for Matrix products from Good Display. and you can buy these development kits online or contact our sales.

 

Q: Does Good Display have a color product or is it only monochrome?

A: Good Display does have a tri-color E-ink display products,.Black White Red mode or Black White Yellow mode, you can learn more by visiting 3-color epaper.  

 

Q: How long does it take to update an image on an Matrix e-ink display?

A: An e-ink display module supports numerous modes for updating the display. Different modes exist to support the different update requirements. Update times can be as short as 300 msec. for the entire display. Also to consider is that because e-ink screens are bi-stable, only the regions of the screen that are changing require updating. Any pixels that are not changing do not require updating.

 

Q: Can an Matrix e-ink display support animation or video rates?

A: Using the faster update modes, e-ink screens can support animation quality video rates. A number of examples are available from customers that show examples of e-ink screens showing video.

 

Q: Does Good Display provide or support flexible matrix displays?

A: The flexibility of an EPD display is controlled by the backplane. Good Display does support flexible backplanes, if you're intrested, please contact us.

 

Q: What is the thickness of an Matrix E-Paper display?

A: Thicknesses range from 1mm to 1.2 mm. This includes the FPL, protective sheet and the glass TFT backplane.

 

Q: What is the temperature range for Matrix E-Paper displays?

A: The operating temperature range for an Matrix display is from 0-50 °C, and the storage temperature range is from -20-70°C.

 

Q: What is waveform?

A: Waveform are predefined voltage impulse sequences used by display controller to manipulate ink.
The voltage sequence and temperature range are stored in a lookup Table(LUT) and is precisely paired to the display by production lots to enable precise placement of pigment to achieve accurate gray-level.

 

Q: Why does waveform need?

A: Because of every lots of E INK material has slightly different at ink characteristics which effects are temperature dependent.
So, waveform is a driving method which consider the factor of temperature, production lot, display size and waveform type to control the each lots of EPD performance at same range, and this is Good Display's responsibility to provide the suitable waveform to our customer.

 

Q: What are the types of waveform mode?

A: The waveform mode optional argument allows you to select the type of waveform update.

WF type

Updated time

Bit depth

Properties

INIT

4 sec

1

The INIT waveform flashes the display and drives the display to a white state. Used this waveform if the display is in an unknown state such as when the previous image is unknown due to reboot, or just test the host function.

MU/DU

260 ms

1

Direct update is only used when pixels are updating from any gray-level to either white to black such as handwriting or menu. Gray pixels will not be affected, MU/DU is about twice as fast as GC or GU.

GU

780 ms

2~4

Grayscale Update is a non-flashing waveform that can be used to update changing grayscale pixels.

GC4/8/16

600/780/980 ms

2~4

Grayscale Clear is a flashing waveform used to provide the accurate update performance. All pixels are updated or cleared.

 

Q: What is the normal product lifetime of Good Display's e-ink display?

A: For standard products, it is a minimum of 5 years or the times of refresh is 1,000,000. 
       

Q: Do Good Display E-Paper Displays have CE certification?

A: CE certification is typically given to end products. Since the E-Paper Display is a component, it does not carry CE certification.

 

Q:Can it be realistic? If want to integrate the circuit onto the e paper FPC to replace PCB directly, the PCB will not be used in the product, and the FPC of the epaper need open a mould

A: If the FPC fixed with the components will have a yield problem. The FPC is bendable and it is easy to cause the loss of the components. This solution cannot be operated.

 

Q:Can you do an irregular shape segmen E paper?

A:Yes,, we can .As long as the number of segment is not too many and IC is easy to choose. Additionally, PCB is more easy packaging than that of flexible one . But we can do if must be, tooling cost will be higher 20% - 30%  than normal  type segment E paper .

 

Q: Can large size monochrome or color E paper support FPC open mould?

A:Yes. Minimum order is 10K.The sample delivery date is 25 to 30 days after payment of the model fee.

 

Q: What does LUT and OTP stand for?

A:LUT stands for external waveform, OTP represents the built-in waveform.

 

Q: How to set LUT for OTP support products?

A:The partial refresh support product needs LUT, and the rest can be.

 

Q: Partial refresh remnant shadow problem for GDEW0154D27

A:Extend the refresh time, add a full update after several times.

 

Q: What is the voltage of adapt board?

A:3.3 V, 5 V  without any connection.

 

Q: The reason for the horizontal bar in the three color electronic paper.

A:There is a possibility of a horizontal bar for hardware settings and improper changes in software programs.

 

Q: The cause of red diffusion in the short time after the refresh of the color electronic paper.

A:When the steady state is not established, the refresh is stopped.

 

Q: Why is a SPI  Epaper screen longer than a parallel screen when updating?

A:Because the serial port only transmits 1 bit of data at a time, the parallel way can be transmitted simultaneously.

 

Q: Storage humidity for electronic paper.

A:40% to 70%.

 

Q:Is the E paper display can work on Operation Conditions: Temperature 0℃~40 ℃ ; Humidity 5%~90% RH ?

A:The operating Temperature is okay, but we recommend the suitable Humidity is from 35% to 65% RH.

 

Q:If it is acceptable for Indoor Humidity about 30-60% in Summer & 30-80% in Winter?

A:The Humidity in Summer and in Winter can be acceptable for the matched Temperature range of 0--25℃or +10--35℃.

 

Q:If Tcon demo can come with temperature sensor?

A:The IC LM75A installed on the Tcon is temperature sensor.

 

Q:How to solve the unclean problem when 2.9 inch e-paper display refreshed in the first time from deep sleep mode?

A: The process of refreshing from deep sleep mode is the proccess of re-energizing actually. So it is necessary to have a full refresh first to avoid ghost.

 

Q:Can our normal temperature e-paper display be used under strong light? Why is it partially darkened under strong light? 

A: No.Strong light will dry the charged particles in the microcapsules of e-paper display, make them lose activity and can not be refreshed or be recovered.

 

Q:What is the refreshing time of e-paper display?

A:1,For 2-color(black and white) e-paper display, full refresh is generally around 6s. The display with partial refresh, full refresh: 1s;partial refresh : 300ms around.

2, For 3-color(black, white and red/yellow) e-paper display, full refresh is generally around 12s except for GDEW0154C39 and GDEW0213C38, both of them are 25s around.

 

Q: Can the demo board integrate with the Arduino system?

A: No, only the Raspberry Pi system.

 

Q: Lower Power Solution for the e-paper display.

A: Two ways: cancel the deep sleep mode, or add an analog switch at the front end of the driver circuit.

 

Q:If the waveform file does not correspond to the display, will it affect the refresh?

A:Wave files and e-paper must be one-to-one correspondence. If confused, it may affect the refresh.

 

Q:How to intuitively distinguish the full refresh and the partial refresh?

A:The picture does not flash when partial refresh.

 

Q:What is the meaning of the DSP in the e-paper timing diagram?

A:The DSP is the feedback information that the e-paper passes to the MCU. After receiving the information, the MCU indicates that the e-paper data transmission is completed. This command is generally not used.

 

Q:Can I use the emulator to power e-paper directly?

A:No. Because the power supply of the emulator is unstable, the voltage will be pulled down when the e-paper is refreshed, and eventually it will not work properly.

 

Q:How does the e-paper rotate 180 degrees?

A:This can usually be done by modifying the initial scan direction.

 

Q:I can't find the 0x11 and 0x13 commands in the e-paper specification. What should I do?

A:If the required command is not found in the specification, the customer can consult the IC manual, which has detailed command explanations.

 

Note:

1. After downloading the program of the e-paper, you need to remove the short cap of P12, otherwise the e-paper display will not be lit.

2. In the case of long-term non-refresh, we need to power off the electronic paper or put it into deep sleep mode, otherwise it will damage the IC.

 

Q:When there is a delay in the middle of the two pictures when the e-paper is refreshed, can it be removed?

A:Yes, it can be removed.

 

Q:Does Good Display's DEMO board support the GCC compilation environment?

A:This does not support, the DESPI board is the Keil development environment, and the Arduino board is the Arduino development environment.

 

Q:What is the capacitance range of the e-paper drive circuit?

A:In theory, 50V is needed, and the user can also use 25V instead of the actual design.

 

 

 

Categories:
电子纸常见问题
2020-04-27 11:15:34
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