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    Home / Finished / Good Display GDEW042T2 4.2" 400x300 ePaper display Grayscale

    Good Display GDEW042T2 4.2" 400x300 ePaper display Grayscale

    Code: DD141092A
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    LaskaKit GDEW042T2 (3)
    €20,58 €17,01 excl. VAT
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    Good Display GDEW042T2 4.2" 400x300 ePaper display Grayscale

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    Product detailed description

    E-Ink (or E-Paper) is a so-called electrophoretic display, i.e. a display containing white particles in microcapsules dispersed in a thin layer of dark viscous solution. By applying a short impulse, these white particles will move, possibly tilting towards the front side of the display, which causes the given pixel to appear white. By applying an impulse of opposite polarity, the given pixel appears black. High viscosity of the solution causes micro-particles to remain in their position without change practically permanently.

    It is a 4.2 inch electronic paper display with 400x300 resolution, SPI interface and the ability to display black and white images, logos, icons. The image you display will last indefinitely without power - display the image and then turn off the power. Once these electronic paper display modules are updated, they do not require any power and can actually be completely disconnected, with the content remaining on the display for an unlimited time. This ePaper display is ideal for devices with low energy consumption powered by solar sources or batteries.

    If the display does not refresh every 24 hours, it may lead to a phenomenon known as "Ghosting" or "Image Sticking". In case of use, it is recommended to refresh the display every 24 hours.

    Specifications:

    PART NUMBER GDEW042T2
    SIZE 4.2 inches STORAGE TEMP. -25℃~70℃
    TYPE Dot Matrix CONNECTOR 24 Pin FPC
    IC UC8176 MAX GRAYSCALE 4
    RESOLUTION 400x300 (DPI:120) COLOR Black, White
    OUTLINE SIZE (mm) 91x77x1.18 INTERFACE Sleep
    ACTIVE SIZE (mm) 84.8x63.6 FULL SCREEN UPDATE(s) 3
    PIXEL PITCH(mm) 0.212x0.212 PARTIAL SCREEN UPDATE(s) 0.5
    OPERATING TEMP. 0℃~50℃ STANDBY POWER CONSUMPTION (mW) 0.0165
    POWER CONSUMPTION OF THE REFRESH(mW) 26.4

    Included in delivery:

    • 1pc Good Display GDEW042T2 4.2" 400x300 ePaper display Grayscale

    Remark:

    • This product is not a standalone functional unit and may require professional installation.
    • Product images are for illustration purposes only and may sometimes differ from the actual appearance of the item. However, this does not change its basic properties.

    Additional parameters

    Category: Retired
    Warranty: 2 years
    Weight: 0.022 kg
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    TP Avatar of author 4 grayscale nebo black/white only? 02/09/2023 00:57
    Dobrý den, U displeje je uvedeno "max grayscale 4". Znamená to, že tento displej by měl umět kromě černé a bílé zobrazit ještě dva odstíny šedé? Nebo je ve skutečnosti pouze černobílý a ta poznámka o grayscale znamená něco jiného nebo je nepřesná? Tento displej mám, ale kromě bílé a černé se mi nic jiného zobrazit nepodařilo; podle dokumentace GoodDisplay jsou přenášená data black/white bits. Můžete prosím potvrdit, zdali vám displej zobrazuje i jiné odstíny šedé nebo pouze černou a bílou? Děkuji.
    Reply
    TP Avatar of author 28/09/2023 09:54
    Děkuji za odpověď. Nastavení setTextColor(...) pomocí GxEPD_DARKGREY, GxEPD_LIGHTGREY pouze vede k tomu, že text se vůbec nezobrazí. Při zápisu dat na displej knihovna pouze posílá pole 120 000 bitů, což odpovídá jednobitové white / black informaci pro každý pixel. Stejně tak funguje i ukázkový kód výrobce (též posílá pouze 1 bit pro každý pixel) na https://www.good-display.com/companyfile/70.html. Všechny zobrazené ukázky v tomto kódu obsahují pouze černou a bílou, nikoli další odstíny. Ve specifikaci výrobce, kterou zde uvádíte, se hned na začátku uvádí: "The 4.2'' active area contains 400x300 pixels, and has 1-bit white/black full display capabilities." Ani ukázkový kód od výrobce ani specifikace tedy další odstíny šedé nenaznačuje. Nevím, zdali vám se šedou skutečně podařilo přímo zobrazit? Pokud nikoli, předpokládám, že displej ve skutečnosti zobrazuje pouze černou a bílou, nikoli další odstíny.
    MF Avatar of author 4 grayscale nebo black/white only? 05/09/2023 09:09
    Dobrý den, ano tento displej umožňuje zobrazovat 4 odstíny šedi. Pro změnu barvy se dá použít v příkazu display.setTextColor(xxxxxx); tyto volby: GxEPD_BLACK, GxEPD_DARKGREY, GxEPD_LIGHTGREY a GxEPD_WHITE. Např. barva černá: display.setTextColor(GxEPD_BLACK);